Method for controlling reactive-load compensation capacitor and capable of on-line detecting and reactive-load compensation controller thereof

Abstract

The invention discloses a method for online detecting and controlling reactive compensation capacitor and a reactive compensation controller. The method can execute online detection and control of a reactive compensation capacitor through an external electrical parameter extraction circuit, an AC conversion circuit, a sampling hold circuit, a multi-way switch, an A / D conversion circuit, a CPU and a memory, which are sequentially connected with each other, and a display alarm circuit and a switch circuit connected with the CPU. The invention can detect the work condition online and the performance parameter of the capacitor, and determine the disabled capacitor group when the running capacitors can not operate normally due to the increase of the three phase capacitances and difference thereof or the dielectric loss, thus obviating long-term operation of disabled capacitor and enhancing the compensation effect.

Description

【Technical field】 [0001] The invention relates to a detection and control method and its detection instrument applied in the electric power system, and more specifically relates to a method capable of on-line detection and control of a reactive power compensation capacitor and its controller. 【Background technique】 [0002] The reactive power of the power system must be balanced, that is, the reactive power generated by the power system must be equal to the sum of the reactive power of the load and the reactive power consumed by the transformer and the power line. The loss caused by reactive power in the power system is quite large, generally accounting for about 50% of the total loss of the system. A large part of these losses is caused by the transmission of reactive power between transformers and power lines. Therefore, reducing the transmission of reactive power and achieving local balance of reactive power is an important method to reduce power system losses. In order ...

AI Technical Summary

Problems solved by technology

[0003] However, the current reactive power compensation controllers that use capacitors for reactive power compensation cannot detect the working conditions and performance parameters of the capacitors online. Sometimes, it is impossible to detect which group of capacitors has problems, so that the capacitors will run sick for a long time, reducing the compensation effect. In serious cases, not only the loss is not reduced, but the loss is increased.

[0004] If regular power outages are detected group by group, not only the workload is heavy, but also extremely inconvenient

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