CN116930814A

CN116930814A - Ground detection device

Info

Publication number: CN116930814A
Application number: CN202310813052.XA
Authority: CN
Inventors: 王佼; 田小龙; 刘钊; 刘冬; 张娴
Original assignee: Baoding Power Supply Co of State Grid Hebei Electric Power Co Ltd; State Grid Corp of China SGCC
Current assignee: Baoding Power Supply Co of State Grid Hebei Electric Power Co Ltd; State Grid Corp of China SGCC
Priority date: 2023-07-04
Filing date: 2023-07-04
Publication date: 2023-10-24

Abstract

This application relates to a ground detection device, which relates to the technical field of power system detection. The ground detection device includes a detection host for connecting the secondary circuit of the voltage transformer and the earth. The detection host is equipped with a variable resistor, and the detection host is used for Adjust the resistance value of the variable resistor, and according to the resistance value of the variable resistor and the corresponding detection current, the output voltage transformer indicates whether there is multi-point grounding or there is no multi-point grounding signal; the detector is communicated with the detection host, and the detector is used Used to detect the current of different secondary circuits of voltage transformers. The ground detection device can improve the accuracy of detection results of whether a voltage transformer is grounded multiple times, and can determine the secondary circuit in which grounding occurs among multiple groups of secondary circuits.

Description

Ground detection device

Technical Field

The application relates to the technical field of power system detection, in particular to a ground detection device.

Background

The voltage transformer (PT) is used for converting primary high voltage in the power system into standard secondary voltage in proportion, and is used for devices such as relay protection, measurement and control, metering instruments and the like. In order to ensure that primary voltage is accurately transmitted to the secondary side when a power system fails, and meanwhile, in order to prevent primary and secondary insulation breakdown of a voltage transformer, a plurality of groups of secondary circuits in the voltage transformer are required and only one grounding point is needed for preventing personal injury and equipment damage caused by high-voltage channeling into the secondary side. However, in practical application, due to various reasons such as the construction process is not closed, the operation and maintenance are not in place, the cable is broken, and the like, the situation of multipoint grounding is often caused in a plurality of groups of secondary circuits of the voltage transformer, thus, when the power grid has a grounding fault, the voltage difference of the ground network is instantaneously increased, a great voltage difference is applied to the secondary circuit of the voltage transformer through a neutral line, the voltage actually flowing into the protection device is the voltage superposition differential of the secondary actual voltage of the voltage transformer, the voltage after the phasor superposition can not normally reflect the amplitude and the phase of the primary voltage, the protection action behavior is seriously disturbed, the protection misoperation and the refusal action are possibly caused, and the serious hidden trouble is brought to the safe and reliable operation of the relay protection device. Therefore, in order to avoid the safety accident caused by the multipoint earthing, it is necessary to detect whether the multiple groups of secondary circuits of the voltage transformer have multipoint nodes, in the prior art, a worker tests the current at the earthing position of the secondary circuits of the voltage transformer by using a clamp ammeter, and confirms whether the multiple groups of secondary circuits of the voltage transformer have multipoint earthing through the magnitude of the current at the earthing position.

Disclosure of Invention

In order to solve the above technical problems, embodiments of the present application provide a ground detection device, which can improve the accuracy of a detection result of whether a voltage transformer is grounded multiple times, and can determine secondary circuits in which a ground condition occurs among multiple groups of secondary circuits.

In a first aspect, there is provided a ground fault detection device comprising:

the detection host is used for connecting a secondary circuit of the voltage transformer with the ground, a variable resistor is arranged in the detection host, and the detection host is used for adjusting the resistance value of the variable resistor and outputting a signal that the voltage transformer is in multipoint grounding or in no multipoint grounding according to the resistance value of the variable resistor and the corresponding detection current;

and the detector is in communication connection with the detection host, and is used for detecting the currents of the secondary loops different from the voltage transformer.

According to a first aspect of the application, the probing host comprises:

a host power supply;

the first main control module is connected with the host power supply;

the first test unit comprises a variable resistor and a first current acquisition component, wherein the variable resistor and the first current acquisition component are both connected with the first main control module, and the variable resistor and the first current acquisition component are connected between the secondary circuit of the voltage transformer and the ground.

According to a first aspect of the application, the first test unit further comprises:

and the first contactor is connected with the variable resistor and the first current acquisition component and is used for enabling a circuit between the variable resistor and the first current acquisition component to be connected or disconnected.

According to a first aspect of the present application, the probing host further comprises:

the first indicating unit comprises a first indicating power supply and a first indicating lamp, wherein the first indicating power supply is connected with the first indicating lamp, and the first contactor is further used for enabling a circuit between the first indicating power supply and the first indicating lamp to be connected or disconnected.

the second testing unit comprises a second contactor and a second current acquisition component, the second contactor and the second current acquisition component are both connected with the first main control module, and the second contactor and the second current acquisition component are connected between the secondary circuit of the voltage transformer and the ground;

the second contactor is used for enabling a circuit between the secondary circuit of the voltage transformer and the second current acquisition component to be connected or disconnected.

the second indicating unit comprises a second indicating power supply and a second indicating lamp, wherein the second indicating power supply is connected with the second indicating lamp, and the second contactor is also used for enabling a circuit between the second indicating power supply and the second indicating lamp to be connected or disconnected.

and the first display screen is connected with the first main control module.

the first wireless transceiver is connected with the first main control module;

the detector comprises:

detecting a power supply;

the second main control module is connected with the detection power supply;

and the second wireless transceiver is connected with the first wireless transceiver and the second main control module.

According to a first aspect of the application, the detector further comprises:

the third current acquisition component is connected with the second main control module and the detection power supply;

and the amplifying current sensor is connected with the third current acquisition component.

According to a first aspect of the application, the detector further comprises:

the second display screen is connected with the detection power supply and the second main control module;

and the third display screen is connected with the detection power supply and the second main control module.

The grounding detection device provided by the embodiment of the application comprises a detection host and a detector, wherein the detection host is connected with a secondary circuit of a voltage transformer and the ground, a variable resistor is arranged in the detection host, when the detection host detects multiple groups of secondary circuits of the voltage transformer, the condition that the current changes along with the change of the variable resistor is detected to judge whether the multiple groups of secondary circuits of the voltage transformer are grounded at multiple points or not; in addition, the detector is utilized to sequentially detect multiple groups of secondary circuits of the voltage transformer, so that current change trends in different groups of secondary circuits of the voltage transformer are obtained, then the secondary circuits with specific grounding conditions can be determined according to comparison between the current change trends in different groups of secondary circuits and the resistance change trend of the variable resistor, and the subsequent targeted maintenance is facilitated, and the work efficiency is improved.

Drawings

The above and other objects, features and advantages of the present application will become more apparent by describing embodiments of the present application in more detail with reference to the attached drawings. The accompanying drawings are included to provide a further understanding of embodiments of the application and are incorporated in and constitute a part of this specification, illustrate the application and together with the embodiments of the application, and not constitute a limitation to the application. In the drawings, like reference numerals generally refer to like parts or steps.

Fig. 1 is a block diagram of a ground fault detection device according to an exemplary embodiment of the present application.

Fig. 2 is a block diagram of a probing host according to an exemplary embodiment of the present application.

Fig. 3 is a schematic architecture diagram of a probing host according to an exemplary embodiment of the present application.

Fig. 4 is a block diagram of a detector according to an exemplary embodiment of the present application.

Fig. 5 is a schematic diagram of a detector according to an exemplary embodiment of the present application.

Fig. 6 is a block diagram of a first master control module according to an exemplary embodiment of the present application.

Reference numerals: 100-ground detection device; 110-detecting a host; 111-host power supply; 112-a first master control module; 113-a first test unit; 1131-variable resistance; 1132-a first current acquisition assembly; 1133-a first contactor; 114-a first indication unit; 1141-a first indication power supply; 1142-a first indicator light; 115-a second test unit; 1151-a second contactor; 1152-a second current acquisition component; 116-a second indication unit; 1161-a second indicator power supply; 1162-a second indicator light; 117-a first display; 118-a first wireless transceiver; 120-detector; 121-detecting a power supply; 122-a second master control module; 123-a second wireless transceiver; 124-a third current collection assembly; 125-amplifying the current sensor; 126-a second display screen; 127-a third display screen; 200-secondary loop; 300-earth.

Detailed Description

Hereinafter, exemplary embodiments according to the present application will be described in detail with reference to the accompanying drawings. It should be apparent that the described embodiments are only some embodiments of the present application and not all embodiments of the present application, and it should be understood that the present application is not limited by the example embodiments described herein.

Fig. 1 is a block diagram of a ground fault detection device according to an exemplary embodiment of the present application. Fig. 2 is a block diagram of a probing host according to an exemplary embodiment of the present application. Fig. 3 is a schematic architecture diagram of a probing host according to an exemplary embodiment of the present application.

As shown in fig. 1 to 3, the ground detection device 100 provided in the embodiment of the present application may include a detection host 110, where the detection host 110 is used to connect the secondary circuits 200 of the voltage transformers with the ground 300, specifically, before detection, the concentrated ground points of the multiple groups of secondary circuits 200 of the voltage transformers are disconnected from the ground 300, the concentrated ground points are connected to one signal end of the detection host 110, and the other signal end of the detection host 110 is connected to the ground 300, so that the current of the concentrated ground points of the multiple groups of secondary circuits 200 of the voltage transformers may pass through the detection host 110.

It should be noted that, the detection host 110 is provided with a variable resistor 1131, and in the process of detecting whether the voltage transformer has multipoint grounding, the resistance value of the variable resistor 1131 can be adjusted, and according to the change condition of the organization of the variable resistor 1131 and the corresponding detection current, a signal that the voltage transformer has multipoint grounding or does not have multipoint grounding is output.

Specifically, if the voltage transformer is grounded at multiple points, and multiple secondary circuits 200 of the voltage transformer are grounded at multiple points, a circuit is formed between the voltage transformer and the ground 300, and a larger grounding current is formed. Therefore, in the detection process using the detection host 110, if the detection current changes along with the resistance change of the variable resistor 1131, it is indicated that a complete loop is formed between the multiple groups of secondary loops 200 of the voltage transformer and the ground 300, and it is also indicated that the multiple groups of secondary loops 200 of the voltage transformer are grounded at multiple points; if the detected current does not change along with the change of the variable resistor 1131, it is indicated that no complete loop is formed between the multiple groups of secondary loops 200 of the voltage transformer and the ground 300, and it is also indicated that the multiple groups of secondary loops 200 of the voltage transformer do not have the condition of multipoint grounding.

It should be understood that when the detecting host 110 is used to detect the multiple secondary circuits 200 of the voltage transformer, by detecting the current changing along with the change of the variable resistor 1131, whether the multiple secondary circuits 200 of the voltage transformer are grounded at multiple points is determined, so that compared with the mode of determining whether the multiple secondary circuits 200 of the voltage transformer are grounded at multiple points by current values alone, the situation of erroneous determination due to abrupt change of current values can be avoided, thereby improving the accuracy of the final detection result and being beneficial to more accurately determining whether the multiple secondary circuits 200 of the voltage transformer are grounded at multiple points.

Fig. 4 is a block diagram of a detector according to an exemplary embodiment of the present application. Fig. 5 is a schematic diagram of a detector according to an exemplary embodiment of the present application. As shown in fig. 1, 4 and 5, the ground fault detection device 100 provided in the embodiment of the present application may further include a detector 120, where the detector 120 is communicatively connected to the detection host 110, and the detector 120 may be used to detect currents of different secondary circuits 200 of the voltage transformer.

In practical application, after the detecting host 110 outputs a signal that the voltage transformer has multipoint grounding, the detector 120 can be utilized to sequentially detect multiple groups of secondary circuits 200 of the voltage transformer, so as to obtain current variation trends in different groups of secondary circuits 200 of the voltage transformer, and then the secondary circuits 200 with specific grounding conditions can be determined according to the current variation trends in different groups of secondary circuits 200 and the resistance variation trend of the variable resistor 1131.

Specifically, if the current change trend in the secondary circuit 200 coincides with the resistance change trend of the variable resistor 1131, it can be considered that the secondary circuit 200 is grounded; in contrast, if the current change trend in the secondary circuit 200 does not coincide with the resistance change trend of the variable resistor 1131, it is considered that the secondary circuit 200 is not grounded.

It should be appreciated that after the detector 120 sequentially detects the multiple sets of secondary circuits 200 of the voltage transformer, the secondary circuit 200 with the specific grounding condition can be determined, which is beneficial to the subsequent targeted maintenance and the improvement of the working efficiency.

The grounding detection device 100 provided by the embodiment of the application comprises a detection host 110 and a detector 120, wherein the detection host 110 is connected with a secondary circuit 200 of a voltage transformer and the ground 300, a variable resistor 1131 is arranged in the detection host 110, when the detection host 110 detects multiple groups of secondary circuits 200 of the voltage transformer, whether the multiple groups of secondary circuits 200 of the voltage transformer are grounded at multiple points is judged by detecting the condition that the current changes along with the change of the variable resistor 1131, so that compared with the mode of judging whether the multiple groups of secondary circuits 200 of the voltage transformer are grounded at multiple points by singly using the current value, the misjudgment caused by abrupt change of the current value can be avoided, the accuracy of the final detection result is improved, and the judgment of whether the multiple groups of secondary circuits 200 of the voltage transformer are grounded at multiple points is facilitated to be more accurately confirmed; in addition, the detector 120 is utilized to sequentially detect multiple groups of secondary circuits 200 of the voltage transformer, so as to obtain current variation trends in different groups of secondary circuits 200 of the voltage transformer, and then the secondary circuits 200 with grounding conditions can be determined according to comparison between the current variation trends in different groups of secondary circuits 200 and the resistance variation trend of the variable resistor 1131, thereby being beneficial to follow-up targeted maintenance and improving the working efficiency.

As shown in fig. 2 and 3, the detection host 110 may include a host power supply 111, a first main control module 112, and a first test unit 113, where the first main control module 112 is connected to the host power supply 111, the host power supply 111 may provide electric energy for the first main control module 112, the first test unit 113 may include the aforementioned variable resistor 1131 and a first current collecting component 1132, where the variable resistor 1131 and the first current collecting component 1132 are both connected to the first main control module 112, and the variable resistor 1131 and the first current collecting component 1132 are connected between the secondary circuit 200 of the voltage transformer and the ground 300.

Specifically, in practical applications, the first main control module 112 may send a control signal to the variable resistor 1131 to control the resistance of the variable resistor 1131 to change, and the first current collecting component 1132 may collect the detected current. Because the variable resistor 1131 and the first current collecting component 1132 are connected between the secondary circuits 200 of the voltage transformer and the ground 300, if the multi-group secondary circuits 200 of the voltage transformer have the multi-point grounding condition, the resistance value of the variable resistor 1131 is adjusted, and the value of the detection current collected by the first current collecting component 1132 also changes correspondingly.

It should be noted that, the current sampling circuit adopted by the first current collecting component 1132 is described in the related art, and the specific circuit structure of the first current collecting component 1132 is not specifically described in the present application.

As shown in fig. 2 and 3, the first test unit 113 may further include a first contactor 1133, the first contactor 1133 connects the variable resistor 1131 and the first current collecting assembly 1132, and the first contactor 1133 may connect or disconnect a circuit between the variable resistor 1131 and the first current collecting assembly 1132.

Specifically, in a state where the first contactor 1133 is closed, a circuit is communicated between the variable resistor 1131 and the first current collecting member 1132; in a state where the first contactor 1133 is opened, a circuit between the variable resistor 1131 and the first current collecting member 1132 is opened.

In an embodiment, the first contactor 1133 may be mechanically configured to open or close the first contactor 1133 by manual operation, thereby allowing or opening a circuit between the variable resistor 1131 and the first current collection assembly 1132.

In an embodiment, the first contactor 1133 may be in an electrical structure, the first contactor 1133 is connected to the first main control module 112, and the first main control module 112 may control the first contactor 1133 to be opened or closed by a control signal, so that a circuit between the variable resistor 1131 and the first current collecting component 1132 is connected or disconnected.

As shown in fig. 2 and 3, the detection host 110 may further include a first indication unit 114, the first indication unit 114 may include a first indication power supply 1141 and a first indication lamp 1142, the first indication power supply 1141 is connected to the first indication lamp 1142, the first indication power supply 1141 may provide power to the first indication lamp 1142, and the first contactor 1133 is further configured to connect or disconnect a circuit between the first indication power supply 1141 and the first indication lamp 1142.

It should be noted that, when the first contactor 1133 is opened, the circuit between the variable resistor 1131 and the first current collecting component 1132 is opened, and the circuit between the first indication power supply 1141 and the first indication lamp 1142 is opened; under the condition that the first contactor 1133 is closed, the variable resistor 1131 is communicated with the first current collecting component 1132, the first indication power supply 1141 is communicated with the first indication lamp 1142, and the first indication lamp 1142 is turned on, so that a worker can judge whether the variable resistor 1131 is communicated with the first current collecting component 1132 or not through the state of the first indication lamp 1142, and the accuracy of the subsequent multipoint grounding detection result is improved.

As shown in fig. 2 and 3, the probing host 110 further includes a second testing unit 115, where the second testing unit 115 includes a second contactor 1151 and a second current collecting component 1152, where the second contactor 1151 and the second current collecting component 1152 are connected to the first main control module 112, and the second contactor 1151 and the second current collecting component 1152 are connected between the secondary circuit 200 of the voltage transformer and the ground 300, and the second contactor 1151 is used to connect or disconnect a circuit between the secondary circuit 200 of the voltage transformer and the second current collecting component 1152.

Specifically, in a state where the second contactor 1151 is closed, electrical communication with the second current collection assembly 1152; in a state where the second contactor 1151 is opened, a circuit between the variable resistor 1131 and the second current collecting member 1152 is opened.

In an embodiment, in a state that the first contactor 1133 is opened and the second contactor 1151 is closed, the concentrated grounding points of the multiple groups of secondary circuits 200 of the voltage transformer are connected to the ground 300 through the second current collecting component 1152, so that whether the multiple groups of secondary circuits 200 of the voltage transformer have multipoint grounding can be determined according to the magnitude of the current value collected by the second current collecting component 1152.

Specifically, if the current value collected by the second current collecting component 1152 is less than 50mA, then it can be considered that the multiple groups of secondary circuits 200 of the voltage transformer do not have the multipoint earthing condition; if the current value collected by the second current collecting component 1152 is greater than or equal to 50mA, then it can be considered that the multiple groups of secondary circuits 200 of the voltage transformer have the multipoint earthing condition, that is, the detecting host 110 in the present application further integrates the function of detecting the current value by using the clamp ammeter in the related art to determine whether the multiple groups of secondary circuits 200 of the voltage transformer have the multipoint earthing function, and according to the actual situation, the first contactor 1133 is closed or the second contactor 1151 is closed, and the function of determining whether the multiple groups of secondary circuits 200 of the voltage transformer have the multipoint earthing function in different detection manners, so that the application range is wider.

In an embodiment, the second contactor 1151 may be mechanically configured to open or close the second contactor 1151 by a manual operation, thereby enabling or opening a circuit between the secondary circuit 200 of the voltage transformer and the second current collecting assembly 1152.

In an embodiment, the second contactor 1151 may be in an electrical structure, the second contactor 1151 is connected to the first main control module 112, and the first main control module 112 may control the second contactor 1151 to be opened or closed by a control signal, so that a circuit between the secondary circuit 200 of the voltage transformer and the second current collecting assembly 1152 is connected or disconnected.

It should be noted that, the current sampling circuit adopted by the second current collecting component 1152 is described in the related art, and the specific circuit structure of the second current collecting component 1152 is not specifically described in the present application.

As shown in fig. 2 and 3, the detection host 110 further includes a second indicating unit 116, where the second indicating unit 116 includes a second indicating power source 1161 and a second indicating lamp 1162, the second indicating power source 1161 is connected to the second indicating lamp 1162, the second indicating power source 1161 may provide power to the second indicating lamp 1162, and the second contactor 1151 is further used to connect or disconnect a circuit between the second indicating power source 1161 and the second indicating lamp 1162.

Note that, in the case where the second contactor 1151 is opened, a circuit between the secondary circuit 200 of the voltage transformer and the second current collecting member 1152 is opened, and a circuit between the second indication power source 1161 and the second indication lamp 1162 is opened; under the condition that the second contactor 1151 is closed, a circuit between the secondary circuit 200 of the voltage transformer and the second current collection component 1152 is communicated, a circuit between the second indication power source 1161 and the second indication lamp 1162 is communicated, and the second indication lamp 1162 is turned on, so that a worker can judge whether a circuit between the secondary circuit 200 of the voltage transformer and the second current collection component 1152 is communicated or not through the state of the second indication lamp 1162, and the detection host 110 is favorable for determining whether the detection host 110 is currently subjected to multipoint grounding detection by using the variable resistor 1131 and the first current collection component 1132 or is subjected to multipoint grounding detection by using the second current collection component 1152.

As shown in fig. 2 and 3, the detection host 110 may further include a first display screen 117, where the first display screen 117 is connected to the first main control module 112.

In an embodiment, when the first contactor 1133 is closed and the second contactor 1151 is opened, the first main control module 112 controls the resistance of the variable resistor 1131 to change, the first main control module 112 may control the first display screen 117 to display a resistance change trend of the variable resistor 1131, and meanwhile, the first main control module 112 may also control the first display screen 117 to display a change trend of the detection current collected by the first current collection component 1132, and a worker may intuitively and rapidly determine whether the multi-group secondary circuit 200 of the voltage transformer has a multi-point grounding condition according to the change trend of the detection current and the change trend of the variable resistor 1131.

In an embodiment, when the first contactor 1133 is opened and the second contactor 1151 is closed, the first main control module 112 may further control the first display screen 117 to display the current value collected by the second current collecting component 1152, and a worker may intuitively and rapidly determine whether the multiple groups of secondary circuits 200 of the voltage transformer have the multipoint grounding condition according to the current value.

In addition, in the detection process, the voltage transformer output by the first main control module 112 may have a multipoint grounded signal or may not have a multipoint grounded signal, and may also be displayed on the first display screen 117 in the form of text, a chart, or the like.

As shown in fig. 2 to 5, the probing host 110 further includes a first wireless transceiver 118, where the first wireless transceiver 118 is connected to the first master control module 112; correspondingly, the detector 120 may include a detection power source 121, a second main control module 122, and a second wireless transceiver 123, where the detection power source 121 is connected to the second main control module 122, and the second wireless transceiver 123 is connected to the first wireless transceiver 118 and the second main control module 122.

Specifically, in the process of detecting the currents of the secondary circuits 200 with different voltage transformers by using the detector 120, the second main control module 122 may transmit the detected current variation trend to the first wireless transceiver 118 in the form of a wireless signal through the second wireless transceiver 123, the first wireless transceiver 118 transmits the signal to the first main control module 112, the first main control module 112 may control the first display screen 117 to display the corresponding current variation trend, and the first main control module 112 may determine whether the detected current variation trend is the same as the resistance variation trend of the variable resistor 1131.

As shown in fig. 4 and 5, the detector 120 further includes a third current collecting component 124 and an amplifying current sensor 125, the third current collecting component 124 is connected to the second main control module 122 and the detecting power source 121, and the amplifying current sensor 125 is connected to the third current collecting component 124.

Specifically, in the process of detecting by using the detector 120, the amplifying current sensor 125 is sleeved on the secondary circuit 200, so that the current in the secondary circuit 200 can be detected and amplified, and the third current collecting assembly 124 is convenient to collect the current in the secondary circuit 200 more easily, so that the accuracy of the collected current is improved.

As shown in fig. 4 and 5, the detector 120 may further include a second display screen 126 and a third display screen 127, where the second display screen 126 is connected to the detection power supply 121 and the second main control module 122, and the third display screen 127 is connected to the detection power supply 121 and the second main control module 122.

In an embodiment, the second display screen 126 may be used to display the operation states of the detection power source 121, the second main control module 122, the fault information, etc.

In an embodiment, the third display 127 may be used for the current magnitude, the current waveform, the current trend, etc. collected by the second current collecting component 1152.

In an embodiment, the first display screen 117, the second display screen 126, and the third display screen 127 may be LED screens, or LCD screens.

It should be noted that, in the embodiment of the present application, the first main control module 112 and the second main control module 122 have the same structure, and the structure of the first main control module 112 is described below as an example.

Fig. 6 is a block diagram of a first master control module according to an exemplary embodiment of the present application. As shown in fig. 6, the first main control module 112 may be either or both of the first device and the second device, or a stand-alone device independent thereof, which may communicate with the first device and the second device to receive the acquired input signals therefrom.

As shown in fig. 6, the first main control module 112 includes one or more processors 1121 and a memory 1122.

The processor 1121 may be a Central Processing Unit (CPU) or other form of processing unit having data processing and/or instruction execution capabilities, and may control other components in the first master control module 112 to perform desired functions.

Memory 1122 may include one or more computer program products that may include various forms of computer-readable storage media, such as volatile memory and/or non-volatile memory. The volatile memory may include, for example, random Access Memory (RAM) and/or cache memory (cache), and the like. The non-volatile memory may include, for example, read Only Memory (ROM), hard disk, flash memory, and the like. One or more computer program instructions may be stored on the computer readable storage medium that can be executed by the processor 1121 to implement the control methods and/or other desired functions of the various embodiments of the present application described above. Various contents such as an input signal, a signal component, a noise component, and the like may also be stored in the computer-readable storage medium.

In one example, the first master control module 112 may further include: an input device 1123 and an output device 1124, interconnected by a bus system and/or other form of connection mechanism (not shown).

When the controller is a stand-alone device, the input means 1123 may be a communication network connector for receiving the collected input signals from the first device and the second device.

In addition, the input device 1123 may also include, for example, a keyboard, a mouse, and the like.

The output device 1124 may output various information to the outside including determined distance information, direction information, etc. The output devices 1124 can include, for example, a display, speakers, a printer, and a communication network and remote output device connected thereto, etc.

Of course, only some of the components of the first main control module 112 relevant to the present application are shown in fig. 6 for simplicity, and components such as buses, input/output interfaces, etc. are omitted. In addition, the first main control module 112 may also include any other suitable components according to the specific application.

The computer program product may write program code for performing operations of embodiments of the present application in any combination of one or more programming languages, including an object oriented programming language such as Java, C++ or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computing device, partly on the user's device, as a stand-alone software package, partly on the user's computing device, partly on a remote computing device, or entirely on the remote computing device or server.

The computer readable storage medium may employ any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. The readable storage medium may include, for example, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More specific examples (a non-exhaustive list) of the readable storage medium would include the following: an electrical connection having one or more wires, a portable disk, a hard disk, random Access Memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

The basic principles of the present application have been described above in connection with specific embodiments, however, it should be noted that the advantages, benefits, effects, etc. mentioned in the present application are merely examples and not intended to be limiting, and these advantages, benefits, effects, etc. are not to be considered as essential to the various embodiments of the present application. Furthermore, the specific details disclosed herein are for purposes of illustration and understanding only, and are not intended to be limiting, as the application is not necessarily limited to practice with the above described specific details.

The block diagrams of the devices, apparatuses, devices, systems referred to in the present application are only illustrative examples and are not intended to require or imply that the connections, arrangements, configurations must be made in the manner shown in the block diagrams. As will be appreciated by one of skill in the art, the devices, apparatuses, devices, systems may be connected, arranged, configured in any manner. Words such as "including," "comprising," "having," and the like are words of openness and mean "including but not limited to," and are used interchangeably therewith. The terms "or" and "as used herein refer to and are used interchangeably with the term" and/or "unless the context clearly indicates otherwise. The term "such as" as used herein refers to, and is used interchangeably with, the phrase "such as, but not limited to.

It is also noted that in the apparatus, devices and methods of the present application, the components or steps may be disassembled and/or assembled. Such decomposition and/or recombination should be considered as equivalent aspects of the present application.

The previous description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects without departing from the scope of the application. Thus, the present application is not intended to be limited to the aspects shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

The foregoing description has been presented for purposes of illustration and description. Furthermore, this description is not intended to limit embodiments of the application to the form disclosed herein. Although a number of example aspects and embodiments have been discussed above, a person of ordinary skill in the art will recognize certain variations, modifications, alterations, additions, and subcombinations thereof.

Claims

1. A ground fault detection device, comprising:

2. The ground fault detection device of claim 1, wherein the detection host comprises:

a host power supply;

the first main control module is connected with the host power supply;

3. The ground fault detection device of claim 2, wherein the first test unit further comprises:

4. A ground fault detection device in accordance with claim 3 wherein said detection host further comprises:

5. The ground fault detection device of claim 2, wherein the detection host further comprises:

6. The ground fault detection device of claim 5, wherein the detection host further comprises:

7. The ground fault detection device of claim 2, wherein the detection host further comprises: and the first display screen is connected with the first main control module.

8. The ground fault detection device of claim 2, wherein the detection host further comprises:

the first wireless transceiver is connected with the first main control module;

the detector comprises:

detecting a power supply;

the second main control module is connected with the detection power supply;

9. The ground fault detection device of claim 8, wherein the detector further comprises: the third current acquisition component is connected with the second main control module and the detection power supply;

10. The ground fault detection device of claim 8, wherein the detector further comprises: