Method for monitoring current acquisition circuit of electric power secondary system
A power secondary system and circuit technology, applied in emergency protection circuit devices, measuring power, measuring devices, etc., can solve the problems of inaccurate abnormal positioning and large workload, so as to reduce maintenance and power outage time, reduce workload, and improve The effect of work efficiency
Inactive Publication Date: 2012-07-04
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 adopted in this embodiment consists of a relay protection device and a state monitoring center. The relay protection device can collect the current value for protection and the current value for measurement, and transmit the current collection value of each phase to the status monitoring center, where the status monitoring center comprehensively judges whether there is any abnormality in the entire current acquisition circuit. The current acquisition loop of the phase is abnormal.
[0016] The AC acquisition circuit of the relay protection device itself has the function of self-checking, and sends the self-checking information to the state monitoring center, and the detection result is used as the judgment condition for abnormal location. The AC acquisition circuit includes a current acquisition circuit and a voltage acquisition circuit.
[0017] like figure 1 As shown, the method for monitoring the current acquisition lo...
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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 secondary power system, in particular to a method for monitoring a current acquisition loop of a secondary power system. Background technique [0002] The power relay protection system consists of AC circuit, DC circuit, relay protection device itself, circuit breaker tripping and closing circuit and other links. At present, the maintenance of relay protection still adopts the stage of preventive maintenance, and the periodic maintenance mode is adopted during operation. Regular maintenance does play a role in directly preventing or delaying failures in ensuring the normal operation of the equipment. However, this kind of maintenance that is not based on the actual conditions of the equipment and is only based on the specified time interval will inevitably result in excess maintenance, which will not only cause the equipment to effectively utilize time. Losses and waste of manpower, material ...
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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