Method for monitoring current acquisition circuit of electric power secondary system
A power secondary system and circuit technology, which is applied in the direction of emergency protection circuit devices, measuring electricity, measuring devices, etc., can solve the problems of inaccurate abnormal location and heavy workload, so as to reduce maintenance power outage time, reduce workload, and improve The effect of work efficiency
Inactive Publication Date: 2010-04-28
STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST +1
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However, this method only realizes the alarm function after the secondary circuit is abnormal, and the location of the abnormality is not accurate enough. When checking the abnormality, it is necessary to check the current secondary circuit and the current acquisition circuit of the relay protection device in an interval, and the workload is heavy.
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[0015] The current acquisition loop monitoring system used in this embodiment is composed of a relay protection device and a state monitoring center. The relay protection device can collect the protection current value and the measurement current value, and transmit the current collection value of each phase to the state monitoring center, and the state monitoring center will comprehensively judge whether there is any abnormality in the entire current collection circuit. If there is an abnormality, locate a certain The phase current collection circuit is abnormal.
[0016] The AC acquisition circuit of the relay protection device itself has a self-inspection function, and the self-inspection information is sent to the state monitoring center, and the detection result is used as the judgment condition for abnormal location. The AC acquisition loop includes a current acquisition loop and a voltage acquisition loop.
[0017] like figure 1 As shown, the method for monitoring the...
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The invention relates to a method for monitoring the state of a current acquisition circuit of an electric power secondary system. The method adopts a state monitoring center to collect electrical quantities acquired by a relay protective device so as to judge the abnormities of the current acquisition circuit and position the abnormities of a secondary circuit of certain single-phase current by combining the judgment and abnormity alarm signals of a TA circuit. The method accurately reflects the condition of the current acquisition circuit, realizes the circuit state monitoring, greatly reduces the workload of overhaul and fault removal, reduces the power-cut time for overhauling equipment, and improves the working efficiency.
Description
technical field [0001] The invention relates to a state monitoring technology of a power secondary system, in particular to a monitoring method for a current collection circuit of a power secondary system. Background technique [0002] The power relay protection system consists of various links such as the AC circuit, the DC circuit, the relay protection device itself, and the tripping and closing circuit of the circuit breaker. The maintenance of relay protection is still in the stage of preventive maintenance, and the mode of regular maintenance is adopted during operation. Regular maintenance does play a role in directly preventing or delaying failures in ensuring the normal operation of the equipment, but this kind of maintenance that is not based on the actual condition of the equipment, but simply at regular intervals, will inevitably lead to redundant maintenance, which will not only cause the equipment to use time effectively. Loss and waste of manpower, material an...
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IPC IPC(8): G01R31/08G01R31/02H02H7/00
Inventor 韩平李瑞生包伟石光赵勇李晓朋
Owner STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST