CN203180652U - Five-prevention electric display locking system - Google Patents

Abstract

The utility model discloses a five-prevention electric display locking system comprising three units. A first unit is integrated by a high voltage electric display device and a wireless emitting device, the first unit is connected to an outlet position of a grid and a cable, and the unit collects device electric signals and sends the signals via a wireless manner. A second unit comprises a wireless receiving device and a five-prevention electric display locking device, a third unit comprises a five-prevention system and a monitoring system, and the five-prevention electric display locking device is respectively connected with the five-prevention system and the monitoring system via a wireless communication protocol. A wireless receiving module and the five-prevention electric display locking device are additionally provided so that a logic database of the five-prevention system is prevented from going wrong, the switch-out with a load without a complete cut-off of a circuit breaker is prevented, and misinformation and false alarm of the monitoring system are prevented.

Description

Five anti-live display locking system

technical field

The utility model relates to a five-prevention system for electric power, in particular to a five-prevention electrification locking system applied to the five-prevention system.

Background technique

In the power system, the charged state is an important parameter to characterize whether a certain line is charged and whether it is running normally. With the continuous progress of the society, the rapid development of the national economy, and the widespread application of high-tech in the power system, the utilization rate of cables is also increasing, and the safety status is also more important. Because the places where the power system uses cables are large in coverage, large in number, and densely laid, and often the power cables are prone to short circuits at the joint points in the sealed network cabinets and branch boxes. Fire will have catastrophic consequences. Therefore, monitoring whether the cable is live is a means to ensure the reliability of power supply and the effectiveness of safe production.

The five-proof function refers to: (1) Preventing the wrong opening and closing of the circuit breaker. (2) Prevent load opening and closing isolating switches. (3) Prevent charged from hanging (closing) the grounding wire (grounding switch). (4) Prevent the circuit breaker (isolating switch) with a grounding wire (grounding switch) from being closed. (5) Prevent strayed into the electrified interval.

The five-prevention system is the main equipment to prevent misoperation in the substation, and it is an important equipment to ensure the safe operation of the substation and prevent human misoperation. Any normal switching operation must go through the simulation preview and logical judgment of the five-prevention system, so ensure the integrity of the five-prevention system And perfection, can greatly prevent and reduce the occurrence of power grid accidents. With the development of the power grid and the increasing power consumption of users, the reliability of power supply for users is getting higher and higher, and the role of the five-proof system has become more important.

The working principle of the five-prevention system is to first simulate the rehearsal operation on the anti-mistake host computer during the switching operation. The anti-mistake host computer performs a locking logic judgment on each simulated operation according to the pre-stored anti-misoperation locking logic library and the current equipment position status. The correct simulated operation content generates the actual operation program and transmits it to the computer key, and the operator opens the corresponding coded lock in turn to operate the equipment according to the operation content displayed by the computer key. After all the operations are completed, the device status is kept consistent with the on-site device status through the return of the computer key.

However, the five-defense system has no prompt function for equipment displacement, and completely depends on the background monitoring signal. If the operator is sloppy, careless or the monitoring is not in place, the background displacement signal will be missed, especially in the process of overhaul, regular inspection or large-scale operation. In the background, the background signals are frequent and numerous, and the displacement signals sent by the device are often mixed with other signals, which is difficult to be found at this time. During the shift change, the handover personnel may also fail to explain clearly the location and status of the equipment due to busyness or negligence. Once these situations occur, misoperation accidents may be caused, and the consequences will be disastrous.

To sum up, the existing five-defense system does not have the ability to independently determine the location of the equipment. When the equipment sends a displacement signal by mistake, it will cause the five-defense system to misjudge the location of the equipment, lose the basic ability to prevent errors, and cause errors. Occurrence of operational accidents.

Utility model content

The utility model overcomes the deficiencies of the prior art, and provides a five-prevention electrification display locking system. The system adds a wireless receiving module and a five-prevention electrification display locking device to prevent errors in the logic library of the five-prevention system; The on-load switching occurs during disconnection; at the same time, the monitoring system is prevented from misreporting and misreporting, and the technical problems in the prior art are solved.

In order to solve the above-mentioned technical problems, the utility model adopts the following technical solutions:

A five anti-live display locking system, the five anti-live display locking system includes three units:

The first unit: It is composed of an integrated high-voltage live display device and a wireless transmitter, connected to the outlet position of the power grid cable, and the unit collects the live signal of the equipment and sends the signal through wireless form;

The second unit: It is composed of a wireless receiving device and a five anti-live display locking device,

The third unit: It is composed of the five-proof system and the monitoring system; the five-proof live display locking device is connected to the five-proof system and the monitoring system through a wireless communication protocol. The five-prevention system and the monitoring system used in this patent all adopt the five-prevention system and the monitoring system in the prior art.

When the high-voltage charged display device shows that the equipment is charged, the charged signal can be transmitted back to the second unit through the wireless communication protocol through the wireless module. It is transmitted to the five-defense system and the monitoring system, and the five-defense device will be completely blocked. In this way, one can prevent errors in the logic library of the five-proof device, two can prevent the problem of switching on load when the circuit breaker is not completely disconnected, and three can transmit the signal remotely by combining with a high-voltage live display device Go to the background machine of the monitoring system, and intuitively display whether the equipment is charged on the background machine of the monitoring system, which is conducive to remote monitoring of the equipment and avoids signal misinformation and false alarms.

Further technical solutions are:

The five anti-live display locking device includes a signal receiving separator and a relay. Because there are many manufacturers of monitoring systems, the communication protocols of each monitoring system are different, and most of the monitoring systems of each substation are also different. Therefore, on the one hand, it is necessary to rely on the signal receiving separator to transmit the live information of the equipment to the monitoring system through the communication bus, and at the same time, the signal of the grounding switch of the relay should be used to communicate with the monitoring system. When the signal receiving separator receives the signal from the electrification display device, it transmits the signal to the five-prevention system on the one hand, and at the same time, its five-prevention electrification display locking device has a built-in relay, which can output the closure information of the node to the outside. The closing of the relay can be controlled by judging whether the signal is electrified or not. In this way, the monitoring system can directly access the closure information of the node, and judge whether the device is charged through the closure information of the node, so as to achieve an intuitive display of whether the device is charged on the monitoring background machine, which is conducive to remote monitoring of the device and avoids signal misinformation. .

The five anti-live display locking devices are respectively connected with the five anti-static system and the monitoring system through the 485 wireless communication protocol or the 232 wireless communication protocol.

The circuit structure of the high-voltage charged display device includes a bridge rectifier circuit, a capacitor Cx, a bidirectional trigger diode DB3 and a thyristor MCR100, and the two input terminals of the bridge rectifier circuit are respectively connected to the metal ring of a phase cable and the ground body, the two output terminals of the bridge rectifier circuit are respectively connected to both ends of the capacitor Cx, the bidirectional trigger diode DB3, the thyristor MCR100 and at least one light emitting diode LED are connected in series.

A current-limiting resistor R is also connected in series between the thyristor MCR100 and the light-emitting diode LED. High-voltage charged display device: the current signal input to the ground capacitor is rectified by the rectifier bridge, and then the capacitor Cx is charged. When the voltage across the capacitor Cx is greater than the voltage of the bidirectional trigger diode DB3, the bidirectional trigger diode DB3 reversely breaks down and starts the thyristor MCR100 , the capacitor passes through the thyristor MCR100, the current limiting resistor R discharges the light-emitting diode, lights up the light-emitting diode, when the voltage across the capacitor is 0V, the thyristor MCR100 cuts off the capacitor Cx and stops discharging, and at this time the load is disconnected and the capacitor Cx is charged again, Such a repeated cycle makes the light-emitting diodes flash and light periodically, and at the same time send the signal to the wireless transmitting device for transmission.

Compared with the prior art, the beneficial effects of the utility model are:

1. It can prevent errors in the logic library of the five-defense system.

2. It can prevent the problem of switching on load when the circuit breaker is not completely disconnected.

3. The signal can be remotely transmitted to the background machine of the monitoring system by combining with the high-voltage live display device, and the background machine can intuitively display whether the equipment is charged, which is conducive to remote monitoring of the equipment and avoids signal misinformation and false alarms.

Description of drawings

Fig. 1 is a block diagram of the utility model;

Fig. 2 is a circuit schematic diagram of the utility model high-voltage charged display device.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further elaborated.

As shown in Figure 1, a five anti-live display locking system includes three units:

The first unit: It is composed of a high-voltage live display device and a wireless transmitting device integrated into one body, and is connected to the outlet position of the power grid cable. After the unit collects the live signal of the equipment, it sends the signal wirelessly; the second unit: consists of a wireless receiving device and five The anti-live display locking device is formed, and the five anti-live display locking devices include a signal receiving separator and a relay. The third unit: consists of five anti-systems and a monitoring system; the five anti-live display locking devices are connected to the five anti-systems and the monitoring system through the 485 wireless communication protocol or the 232 wireless communication protocol. The five-prevention system and the monitoring system used in this patent all adopt the five-prevention system and the monitoring system in the prior art.

When the high-voltage charged display device shows that the equipment is charged, the charged signal can be transmitted back to the second unit through the wireless communication protocol through the wireless module. After the wireless receiving device of the second unit receives the charged signal, the five anti-charged display locking device The signal receiving separator transmits the live information of the equipment to the monitoring machine system through the communication bus, and at the same time uses the signal of the relay grounding switch to communicate with the monitoring machine system. When the signal receiving separator receives the signal from the charged display device, it transmits the signal to the five-prevention system on the one hand, and at the same time, its five-prevented live display locking device has a built-in relay, which can output the closure information of the node to the outside. The closing of the relay can be controlled by judging whether the signal is electrified or not. In this way, the monitoring system can directly access the closure information of the node, and judge whether the device is charged through the closure information of the node, so as to achieve an intuitive display of whether the device is charged on the monitoring background machine, which is conducive to remote monitoring of the device and avoids signal misinformation. .

The high-voltage charged display device in this embodiment can be completed by using any high-voltage charged display device purchased on the market. For example: the models produced by Fuzhou Fuyikai Electric are GSN7-T, GSN4-10T high-voltage live display devices.

Example 2

This embodiment is basically the same as that of Embodiment 1, the difference is that the circuit structure of the high-voltage live display device of this embodiment is shown in Figure 2, including a bridge rectifier circuit, a capacitor Cx, a bidirectional trigger secondary Tube DB3 and thyristor MCR100, the two input terminals of the bridge rectifier circuit are respectively connected to the metal ring and the grounding body of the one-phase cable, and the two output terminals of the bridge rectifier circuit are respectively connected to the two ends of the capacitor Cx, bidirectionally triggering the secondary The tube DB3 and the thyristor MCR100 are connected in series with one light-emitting diode (of course, it can also be connected in series with more than one light-emitting diode). A current-limiting resistor R is also connected in series between the thyristor MCR100 and the light-emitting diode LED. The ground capacitance current signal input is rectified by the rectifier bridge, and then the capacitor Cx is charged. When the voltage across the capacitor Cx is greater than the voltage of the bidirectional trigger diode DB3, the bidirectional trigger diode DB3 reverse breakdown starts the thyristor MCR100, and the capacitor passes through the controllable Silicon MCR100, the current-limiting resistor R discharges the light-emitting diode, lights up the light-emitting diode, when the voltage across the capacitor is 0V, the thyristor MCR100 cut-off capacitor Cx stops discharging, at this time, the load is disconnected and the capacitor Cx is charged again, so that the cycle makes light The diode flashes light periodically, and at the same time sends the signal to the wireless transmitter for transmission. The high-voltage charged display device used in this embodiment is specially made for the measurement of the charged display of the five-proof system, which is highly targeted and can improve the error prevention rate. the

Claims (5)

1. A five anti-live display locking system, the five anti-live display locking system includes three units: The first unit: It is composed of a high-voltage live display device and a wireless transmitter device, connected at the outlet of the grid cable; The third unit: consists of five defense systems and a monitoring system; It is characterized in that: the five-anti-static display locking system also includes a second unit: composed of a wireless receiving device and a five-anti-static display locking device; The five anti-live display locking devices are respectively connected with the five anti-static system and the monitoring system through a wireless communication protocol. 2. The five anti-static display locking system according to claim 1, characterized in that: said five anti-static display locking device includes a signal receiving separator and a relay. 3. The five anti-liveness display locking system according to claim 1, characterized in that: the five anti-liveness display locking devices are respectively connected to the five anti-static system and the monitoring system through the 485 wireless communication protocol. 4. The five anti-charged display locking system according to claim 1, characterized in that: the circuit structure of the high-voltage charged display device includes a bridge rectifier circuit, a capacitor Cx, a bidirectional trigger diode DB3 and a thyristor MCR100 , the two input terminals of the bridge rectifier circuit are respectively connected to the metal ring and the grounding body of a phase cable, the two output terminals of the bridge rectifier circuit are respectively connected to the two ends of the capacitor Cx, the bidirectional trigger diode DB3, the thyristor MCR100 In series with at least one light emitting diode LED. 5. The five anti-charge display locking system according to claim 4, characterized in that: a current-limiting resistor R is connected in series between the thyristor MCR100 and the light-emitting diode LED.

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