Capacitance online monitoring device for parallel capacitor

Abstract

The invention discloses a capacitance online monitoring device for a parallel capacitor. The capacitance online monitoring device for the parallel capacitor comprises a current sensor module, a wireless terminal module, a ZigBee receiving and transmitting module and an upper computer, wherein the current sensor module is connected with the wireless terminal module, the ZigBee reserving and transmitting module and the upper computer in sequence. The current sensor module transmits signals to the wireless terminal module, and the wireless terminal module transmits data to the upper computer through the ZigBee receiving and transmitting module. The wireless terminal module comprises a main control unit, an A / D converting unit and a wireless receiving and transmitting unit, and the main control unit is connected with the A / D converting unit and the wireless receiving and transmitting module respectively. The capacitance online monitoring device for the parallel capacitor is high in reliability and capable of carrying out monitoring in real time, reduces the workload of checking and maintenance greatly, improves the stability of a power grid power supply system, and plays a very important role for the normal power supply of the whole electric power system.

Description

technical field [0001] The invention belongs to the technical field of state monitoring of electrical equipment, in particular to an online monitoring device for capacitance of parallel capacitors. Background technique [0002] The shunt capacitor is the main reactive power compensation equipment of the power system. It is used to compensate the reactive power of the inductive load of the power system. It can effectively improve the power factor of the system, adjust the network voltage and reduce the line loss. It is an effective means of reducing the loss of the power grid. It occupies the first place in the capacity of the entire compensation device, and its safe operation plays a very important role in the stable and normal power supply of the entire power system. In recent years, although the production process of capacitors has been greatly improved, and the dielectric materials have been improved accordingly, serious explosion accidents of capacitors still continue to...

AI Technical Summary

Problems solved by technology

Moreover, the above detection work can only be carried out after the capacitor is damaged and the relay protection action trips the switch. Before the detection, the damage degree of the faulty capacitor cannot be accurately judged. The inspection and maintenance workload is heavy, and it requires a lot of manpower and material resources, and consumes more time, affecting the normal operation of the equipment

[0004] From the statistical analysis of a large number of failures, the sensitivity of the traditional preventive test method to detect early defects of capacitors is relatively low, and capacitor failures frequently occur in two adjacent test cycles.

This shows that the conventional preventive test methods currently used cannot fully and effectively detect the insulation hazards that endanger the safe operation of capacitors.

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