CN203535172U - Abnormity state multi-point monitoring positioning device for power distribution network - Google Patents

Abstract

The utility model discloses a multi-point monitoring and positioning device for an abnormal state of a distribution network, which belongs to the professional technical field of energy saving and loss reduction of a distribution network, and is characterized in that it includes a power supply module, a state sensor, a monitoring device and a positioning unit; the power supply module It includes a voltage transformer and a storage battery connected by a circuit; the state sensor includes a sequentially connected signal acquisition module, a digital switch and a protection resistor; the signal acquisition module is connected to the data circuit of the monitoring device, and the output end of the monitoring device is connected to the digital switch ; The input terminal of the positioning unit is connected with the digital switch data circuit of the state sensor. Compared with the prior art, it has the characteristics of high degree of automation, fast data transmission and positioning speed.

Description

Multi-point detection and positioning device for abnormal state of distribution network

technical field

The utility model relates to a positioning device, in particular to a multi-point monitoring and positioning device for an abnormal state of a power distribution network. the

Background technique

Short circuit fault is the most frequent fault in power system. The so-called short circuit refers to the short circuit between all phases and phases and between phases and ground in the power system except for normal operation. There are many hazards to the power system caused by short-circuit faults: ① When a short-circuit occurs, a large electromotive force and high problems will be generated, which will damage the components in the short-circuit circuit and may cause a fire accident. ②The voltage of the circuit drops suddenly during a short circuit, which seriously affects the normal operation of electrical equipment. ③When the short circuit occurs, the protective device operates, such as the fuse of the fuse blows, and the short circuit is cut off, which will cause a power outage, and the closer the short circuit point is to the power supply, the greater the power outage range, causing inconvenience to life and economic losses. ④Severe short circuit will affect the stability of the power system operation, which can cause the generator sets running in parallel to lose synchronization and cause the system to be disconnected. ⑤Asymmetric short circuit, like single-phase short circuit and two-phase short circuit, the short circuit current will generate a strong unbalanced alternating electromagnetic field, which will cause electromagnetic interference to nearby communication lines and electronic equipment, affecting its normal operation, and may cause malfunction . the

It can be seen from the above that a short circuit in the power system has a serious impact. At present, traditional electromagnetic sensors are mainly used for power system status monitoring, which cannot collect and track line status signals in real time and accurately. Moreover, the fault information transmission speed is slow, and real-time monitoring and real-time transmission cannot be achieved, so that the staff cannot take corresponding measures for the fault in time, which increases the danger of the circuit. At the same time, after a fault occurs, the fault location cannot be located in time. Generally, the method of manual on-site line inspection is used to find the fault, and the degree of automation is low. It is impossible to determine the specific location of the fault in the line, so it still takes a lot of time and manpower to determine the specific location of the fault when troubleshooting, which cannot meet the growing needs of the distribution line operation. Therefore, it is very necessary to develop a device for on-line, timely and accurate monitoring and positioning of distribution network faults. the

Utility model content

The technical task of the utility model is to provide a multi-point monitoring and positioning device for the abnormal state of the distribution network in view of the above deficiencies in the prior art. the

The technical solution of the utility model to solve the technical problem is: a multi-point monitoring and positioning device for abnormal state of distribution network, which is characterized in that it includes a power supply module, a state sensor, a monitoring device and a positioning unit; the power supply module includes a circuit-connected A voltage transformer and a storage battery; the state sensor includes a sequentially connected signal acquisition module, a digital switch and a protective resistor; the signal acquisition module is connected to the data circuit of the monitoring device, and the output terminal of the monitoring device is connected to a digital switch; the positioning The input terminal of the unit is connected with the digital switch data circuit of the state sensor. the

The above-mentioned signal acquisition module is a current collector. the

The above-mentioned monitoring device is a DSP data processor. the

The above positioning unit is a remote radio frequency card. the

Compared with the prior art, the utility model has the following prominent beneficial effects. the

1. The fault information monitoring and transmission speed is fast, which can achieve real-time monitoring and real-time transmission, which improves the efficiency of data collection and processing, enables the staff to take corresponding measures for faults in time, and reduces the danger of the circuit. After a fault occurs, the fault location can be located in time, the degree of automation is high, and the expenditure of manpower and material resources is reduced. the

2. The signal acquisition module adopts KL-M4514 current collector, which can collect and track the line current signal in real time and accurately. the

3. The monitoring device is a DSP data processor, which has fast calculation speed and high accuracy and meets the requirements of real-time monitoring. the

4. The positioning unit is CTC202 remote radio frequency card, which is an electronic tag specially used to be recognized by the remote card reader, and can complete remote transmission. It is an active radio frequency identification card, powered by a button battery, and adopts a power-saving circuit design to save energy Durable, small in size, easy to install, high in receiving sensitivity, and not susceptible to electromagnetic interference from the power grid. Can quickly complete the position and transmit the signal in time. the

Description of drawings

Fig. 1 is a structural schematic block diagram of the utility model. the

Detailed ways

The utility model will be further described below in conjunction with the accompanying drawings and specific embodiments of the description. the

As shown in Figure 1, the utility model includes a power module, a state sensor, a monitoring device and a positioning unit. the

The power module includes a voltage transformer and a storage battery connected with a circuit, and is used to ensure the power consumption demand of the terminal device. the

The state sensor includes a sequentially connected signal acquisition module, a digital switch and a protection resistor. The signal acquisition module is specifically KL-M4514 current collector, KL-M4514 is a multi-channel analog quantity acquisition module, 16 channels of 4-20mA DC current or 0-5V, 0-10V DC voltage signal input, optional RS- 232 or RS-485 interface, the key components are high-precision components, which ensures the high precision and good linearity of the module, and is convenient for on-site installation and debugging. It is suitable for the collection of sensor signals and the communication transmission with the upper computer, which can meet Build monitoring system requirements. the

The signal acquisition module is connected with the data circuit of the monitoring device, the monitoring device is a DSP data processor, and the DSP data processor is embedded with a threshold system, and the threshold value of the system is set in advance according to the actual situation of the line, so as to give full play to the function of the DSP. Data processing capability, designed to perform full digital processing on the collected current signal, convert the current signal into a digital signal, and use it as a fault criterion after calculation. If the actual current value collected is greater than the DSP built-in threshold, it means that a short circuit fault has occurred. The output terminal of the monitoring device is connected to a digital switch and controls its opening and closing. When the actual current value is greater than the threshold value, the monitoring device controls the digital switch to be turned on, and the series connection between the signal acquisition module, the digital switch and the protection resistor is connected, so that the protection The resistor plays the role of protecting the circuit to prevent the status sensor from being burned out by excessive current in the circuit, and the digital switch can continue to transmit the fault information when the digital switch is turned on. the

The input end of the positioning unit is connected to the digital switch data circuit of the state sensor. When the digital switch is turned on, the positioning unit will play a positioning role. The positioning unit is a CTC202 remote radio frequency card, which is an electronic device specially used to be recognized by a remote card reader. The tag can complete long-distance transmission. It is an active radio frequency identification card, powered by a button battery, using a power-saving circuit design, energy-saving and durable, small in size, easy to install, high in receiving sensitivity, and not susceptible to electromagnetic interference from the power grid. the

The positioning unit wirelessly transmits the electronic tag information with a unique location code to the monitoring personnel's computer terminal or mobile terminal with a radio frequency receiving reader, and the staff will deal with the fault in time. the

All the electronic components in the utility model are prior art, can be purchased from the market, the cost performance is high, and its internal structure, hardware and embedded system will not be repeated here. the

It should be noted that the specific embodiments of the present invention have described the present invention in detail, and for those skilled in the art, it will be obvious to those skilled in the art that it can be carried out without departing from the spirit and scope of the present invention. All changes are within the protection scope of the present utility model. the

Claims (4)

1. A distribution network abnormal state multi-point monitoring and positioning device is characterized in that: it includes a power module, a state sensor, a monitoring device and a positioning unit; the power module includes a voltage transformer and a storage battery connected to a circuit; the state sensor It includes a sequentially connected signal acquisition module, a digital switch and a protective resistor; the signal acquisition module is connected to the data circuit of the monitoring device, and the output end of the monitoring device is connected to the digital switch; the input end of the positioning unit is connected to the digital switch data of the state sensor circuit connection. 2. The multi-point monitoring and positioning device for abnormal state of distribution network according to claim 1, characterized in that: the signal acquisition module is a current collector. 3. The multi-point monitoring and positioning device for abnormal state of distribution network according to claim 1, characterized in that: the monitoring device is a DSP data processor. 4. The multi-point monitoring and positioning device for abnormal state of distribution network according to claim 1, characterized in that: the positioning unit is a remote radio frequency card.

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