Tripping circuit of electric power system safety and stability control device, detection system and method
A technology of safe and stable control and trip circuit, applied in circuit devices, emergency protection circuit devices, components of emergency protection devices, etc., can solve problems such as difficulty, and achieve the effect of verifying reliability, ensuring safety, and improving test efficiency.
Pending Publication Date: 2021-08-24
STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST +1
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Problems solved by technology
Therefore, it is necessary for inspectors to take a lot of secondary system safety measures in relevant substations before they can conduct inspections, and the inspection process requires the cooperation of staff in different substations, which is difficult and has certain safety risks
Method used
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Embodiment 1
[0035] see figure 1 , a trip circuit of a power system safety and stability control device, including control power supply, test power supply, normally closed contact CJ1, normally closed contact CJ2, normally open contact TJ1, circuit breaker mechanism, test lamp D1, normally open contact CJ3, normally open Contact CJ4; the circuit breaker mechanism includes a trip coil TQ, figure 1 The dotted line indicates that there are other contacts and components connected in series, but they are omitted in the schematic diagram. The trip circuit also includes a trip circuit monitoring mechanism, which is set outside the safety and stability control device to monitor the trip circuit outside the safety and stability control device. Integrity, which belongs to the currently existing technology, will not be described in detail.
[0036] Among them, the positive pole of the control power supply, the normally closed contact CJ2, the normally open contact TJ1, the normally closed contact CJ...
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The invention belongs to the field of electric power system automation, and particularly relates to a tripping circuit of an electric power system safety and stability control device, a detection system and a detection method, and the tripping circuit comprises a tripping execution circuit and a test execution circuit. The positive electrode of the control power supply, the normally-closed contact CJ2, the normally-open contact TJ1, the normally-closed contact CJ1, the circuit breaker mechanism and the negative electrode of the control power supply are sequentially connected in series to form a tripping execution loop, the tripping execution loop is further connected in parallel with an abnormal indicating lamp D2 and an abnormal indicating lamp D3, and the abnormal indicating lamp D2 and the abnormal indicating lamp D3 are respectively connected in series with a diode; and the positive electrode of the test power supply, the test lamp D1, the normally open contact CJ3, the normally open contact TJ1, the normally open contact CJ4 and the negative electrode of the test power supply are sequentially connected in series to form a test execution loop. According to the invention, the tripping loop can realize automatic detection without power failure, and secondary safety measures do not need to be taken in related substations, so that the test efficiency is greatly improved, and the safety of a large power grid is guaranteed.
Description
technical field [0001] The invention belongs to the field of electric power system automation, and in particular relates to a tripping circuit, a detection system and a method of a power system safety and stability control device. Background technique [0002] The power system safety and stability control device and the system it consists of belong to the "second line of defense" to protect the safety of the power grid, and its reliability directly affects the safety of the entire power grid and power system. The safety and stability control devices of substations constitute the safety and stability control system. When its action is required, the safety and stability control host issues commands to the safety and stability control devices of different substations to perform machine or load shedding operations. Therefore, under normal circumstances, when required When inspecting the safety and stability control device, it will face difficulties, mainly in the following aspec...
Claims
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IPC IPC(8): H02H7/26H02H1/00H02H3/04
CPCH02H7/26H02H1/0007H02H3/046H02H1/0092
Inventor 马伟东宋闯李琼林王阳吴春红孔圣立韩伟刘磊刘超陈宇王默段文岩党一奇刘尧蔡得雨
Owner STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST