CN104979906A - Anti-false-alarm apparatus for relay protection hard press plate - Google Patents

Abstract

The invention discloses an anti-false alarm device for a hard press plate for relay protection, which includes a hard press plate and an alarm device. The alarm device is provided with a data port and an alarm control power supply. The port is provided with a mechanical normally closed contact, and the mechanical normally closed contact is used to control the on-off of the alarm control power supply. When the five-proof alarm key is inserted into the data port, the mechanical normally closed contact is disconnected, and the alarm control power supply is disconnected. When the five-proof alarm key is pulled out, the mechanical normally closed contact is closed, and the alarm control power is automatically turned on. The invention can avoid false alarms caused by the inconsistency between the actual state of the hard pressing plate and the state set by the computer when the five-proof alarm key is inserted into the data port for data transmission.

Description

Relay protection hard pressure plate anti-false alarm device

technical field

The invention relates to a relay protection technology, in particular to a relay protection hard pressing board anti-misoperation technology.

Background technique

The relay protection hard press is an important part of the relay protection device, and its opening and closing state is directly related to whether the protection automation device can operate correctly. At present, the operation of the hard pressing plate of the relay protection device in the substation is carried out by the operator according to the dispatch order. However, because some protection devices have a large number of hard pressure plates, for example, the number of hard pressure plates on the screen of the main transformer protection device may be as many as 20, so the problem of hard pressure plate misoperation often occurs. However, most of the power supply companies in our country currently adopt the method of manual review for this problem, that is, after the operation personnel complete the operation of the hard pressure plate, they check the position of the hard pressure plate one by one according to the requirements of the dispatch order. This method is extremely dependent on the operator himself , is extremely unreliable.

Here, the present invention proposes a method for automatic judgment by computer to avoid misoperation, but it is also necessary to prevent false alarms caused by the inconsistency between the actual state of the hard platen and the state set by the computer.

Contents of the invention

The technical problem to be solved by the present invention is to provide an anti-false alarm device for relay protection hard plate to avoid the occurrence of false alarms.

In order to solve the above-mentioned technical problems, the present invention adopts the following technical scheme: the relay protection hard press plate anti-false alarm device includes a hard press plate and an alarm device, the alarm device is provided with a data port and an alarm control power supply, and the data port is connected to the five anti With the cooperation of the alarm key, the data port is provided with a mechanical normally closed contact, and the mechanical normally closed contact is used to control the on-off of the alarm control power supply. When the five-proof alarm key is inserted into the data port, the mechanical normally closed contact is disconnected , the alarm control power supply is disconnected, when the five-proof alarm key is pulled out, the mechanical normally closed contact is closed, and the alarm control power supply is automatically turned on.

Preferably, the hard press plate includes vertically arranged contacts, and the bottom of the contact is provided with a hard press plate contact, and the hard press plate contact includes a contact on the incoming side and a contact on the sampling side. Below the contact on the sampling side, there are correspondingly an incoming call side and a sampling side, and there is also a hard pressing plate guide with the control contact down to make the hard pressing plate contact conduct. The contact is connected with a return spring. When the hard pressing plate is in position , the contact is subjected to the upward force of the return spring, and the contact of the hard pressure plate is in the disconnected state.

The invention can avoid false alarms caused by the inconsistency between the actual state of the hard pressing plate and the state set by the computer when the five-proof alarm key is inserted into the data port for data transmission.

Description of drawings

The present invention will be further described below in conjunction with accompanying drawing and specific embodiment:

Fig. 1 is the input interface that hard platen is set in the computer;

Figure 2 is a schematic diagram of the structure of the relay protection hard press plate anti-malfunction operating system;

Fig. 3 is a schematic diagram showing that the alarm device is located on the relay protection screen;

Figure 4 is a schematic diagram of the back of the alarm device;

Fig. 5 is a circuit diagram of hard platen state sampling, state comparison, and alarm;

Fig. 6 is the judgment logic diagram of the state quantity of the hard platen state comparison module;

Fig. 7 is a schematic diagram of the hard pressing plate in the sub-position state;

Fig. 8 is a schematic diagram of the hard pressing plate in a closed state.

Detailed ways

As shown in Figures 1 to 8, the relay protection hard-press plate anti-misoperation operating system includes a hard-press-plate state setting module, a hard-press-plate state sampling module, a hard-press-plate state comparison module, and an anti-misoperation alarm module. The setting module sets the state of each hard press plate according to the dispatch order, the hard press plate state sampling module obtains the working state of the hard press plate by collecting the voltage at the contact point of each hard press plate, and the hard press plate state comparison module compares the working status of each hard press plate The state is compared with the set state, and the anti-misoperation alarm module sends a misoperation alarm correspondingly according to the comparison result of the hard platen state comparison module.

As shown in Figure 1, the operator selects the corresponding protective device screen in the computer according to the dispatch order, and sets the state of the hard pressure plate in the interface.

As shown in Figures 2 to 4, the anti-misoperation alarm module includes an alarm device 1 and five anti-alarm keys 2. The anti-misoperation alarm module is connected to the computer 4 through the data line 3, and the operating personnel can check the status of each hard pressing plate through the computer 4. Transmission to five anti-alarm key 2, described alarm device 1 is provided with alarm device and data port 15, and data port 15 can present the structure of USB interface on alarm device 1, and five anti-alarm key 2 is provided with data transmission plug 21, The five-proof alarm key cooperates with the data port 15 through the data transmission plug 21, and transmits the status of each hard platen set by the dispatch order to the alarm device 1.

As shown in Figures 3 and 4, the alarm includes a sound 13 and a warning light 14, and there are two warning lights, one is a red light and the other is a green light. Divided 12 indications on hard pressed boards.

As shown in FIG. 4 , the back of the alarm device 1 is provided with a hard plate state input terminal row 19 , the alarm device is connected to the working power source 16 and the alarm control power source 17 , and the data port 15 is provided with a mechanical normally closed contact 18 . The working power supply is the power required for the normal operation of the anti-misoperation alarm device; the alarm control power supply is the power required for the anti-misoperation alarm device to alarm. When the five-prevention alarm key is inserted into the data port to feed the state quantity to the anti-misoperation alarm device, the mechanical normally closed contact located at the data port of the anti-misoperation device is disconnected, and the alarm control power is disconnected. When the five-proof alarm key is pulled out, the mechanical normally closed contact is closed, and the alarm control power supply is automatically switched on (the power supply of the processor, alarm module, audio, red light, and green light in the anti-misoperation alarm device is provided by the alarm control power supply) . This design can avoid false alarms caused by the discrepancy between the actual state of the hard pressing plate and the state set by the computer when the five-proof alarm key is inserted into the data port for data transmission.

As shown in Figures 7 and 8, the hard press plate includes vertically arranged contacts 101, and the bottom of the contact is provided with a hard press plate contact 103, and the hard press plate contact includes an incoming call side contact and a sampling side contact, Correspondingly be provided with incoming call side 104 and sampling side 105 under contact of incoming call side and sampling side contact, also be provided with the hard pressing plate guide sheet 106 that control contact downwards makes hard pressing plate contact conduction, described contact is connected with Back-moving spring 102, when the hard pressing plate is in the dividing position, the contact is subjected to the upward active force of the returning spring, and the hard pressing plate contact is in a disconnected state.

The hard press plate state sampling module collects the voltage at the contacts of each hard press plate. When the hard press plate is in the position, the contacts are forced upward by the return spring. When the guide piece of the pressure plate is closed, the contact is in contact with the guide piece of the hard pressure plate, and receives a downward force. At this time, the contact of the hard pressure plate is turned on, and there is voltage on the sampling side. When the hard pressing plate is divided, the contact is disconnected; when the hard pressing plate is closed, the contact is turned on. At points 1, 2...n, the voltage is taken as the state quantity of the hard pressing plate. As shown in Figure 5, the voltage state quantity becomes a digital quantity after passing through the converter, so that it is compared with the state input by the operator through the processor. When the states of any group of A and a, B and b are different (uppercase letters represent the setting state, and lowercase letters represent the operating state entered by the operator), the anti-misoperation alarm module is activated, and an alarm is issued to remind the operator to press the hard plate Misuse.

As shown in Figure 6, when A and a are both 1 or 0, the output of the NOR gate is 1, that is, A⊙a=1. If A is different from a, then A⊙a=0. F is 1 only when all the NOR gate outputs (Fa, Fb...) are 1. Therefore, as long as the operating personnel has a hard platen operation error, F will be 0, and the alarm module will give an alarm (sound alarm, red light is on)

After using this invention, the operation steps of relay protection hard pressure plate:

Step 1: Set the status of each hard pressing plate in the computer according to the dispatch order, and transmit it to the five-proof alarm key.

Step 2: Insert the five-proof alarm key into the anti-misoperation alarm device, and transmit the state of the hard pressing plate set by the computer to the anti-misoperation alarm device (alarm control power supply is disconnected, no comparison of state quantities is performed at this time).

Step 3: Operators operate each hard platen.

Step 4: Pull out the five-defense alarm key (the alarm control power is restored, and start to compare the state quantities), if someone operates the hard press without the five-defense alarm key, when he operates the first hard press, The anti-misoperation alarm device will detect that the actual state of the hard platen is different from the set state and send out an alarm signal.

Therefore, the present invention (alarm system for preventing misoperation of relay protection hard press plate) can well solve the problem of misoperation of relay protection hard press plate.

Claims (2)

1. Relay protection hard press plate anti-false alarm device, characterized in that: it includes a hard press plate and an alarm device, the alarm device is provided with a data port and an alarm control power supply, the data port cooperates with the five-proof alarm key, and the data The port is provided with a mechanical normally closed contact, and the mechanical normally closed contact is used to control the on-off of the alarm control power supply. When the five-proof alarm key is inserted into the data port, the mechanical normally closed contact is disconnected, and the alarm control power supply is disconnected. When the five-proof alarm key is pulled out, the mechanical normally closed contact is closed, and the alarm control power is automatically turned on. 2. The relay protection hard press plate anti-false alarm device according to claim 1, characterized in that: the hard press plate includes a vertically arranged contact, the bottom of the contact is provided with a hard press plate contact, and the hard press plate The pressure plate contact includes the incoming call side contact and the sampling side contact. The incoming call side and the sampling side are correspondingly arranged under the incoming call side contact and the sampling side contact. There is also a control contact downward to make the hard pressure plate contact conductive. The guide piece of the hard pressure plate, the contact is connected with a return spring, when the hard pressure plate is in the position, the contact is subjected to the upward force of the return spring, and the contact of the hard pressure plate is in a disconnected state.