Reactive compensation switch cabinet

Abstract

The invention relates to the technical field of power reactive compensation, in particular to a reactive compensation switch cabinet. The reactive compensation switch cabinet comprises a high-voltage power switch which is connected with a power transmission line, wherein the other end of the high-voltage power switch is connected with a vacuum contactor, a fuse protector, a capacitor and an electric reactor in sequence, the fuse protector and the capacitor are connected in series and then are connected with a discharge coil in parallel, and an intelligent detection module collects the output voltage on the power transmission line, carries out filtering processing and voltage comparison and then outputs control signals to the vacuum contactor to control the connection and disconnection of the vacuum contactor. According to the reactive compensation switch cabinet, the vacuum contactor is adopted, the vacuum contactor uses a vacuum arc-extinguishing chamber to achieve arc extinguishing, then running currents can be frequently connected and disconnected, and switching of capacitance can be achieved on the premise that the high-voltage power switch does not need to be disconnected; meanwhile, the switching of the capacitance is controlled directly by the intelligent detection module according to a measured voltage value, the whole process is achieved automatically, manual operation is not needed, and the accuracy and safety of capacitance switching are improved.

Description

technical field [0001] The invention relates to the technical field of electric reactive power compensation, in particular to a reactive power compensation switchgear. Background technique [0002] In the field of power transmission, the transformer has impedance, and in power transmission, a voltage drop will occur, which will change with the change of the load on the user side. The fluctuation of system voltage and the change of load on the user side will cause large fluctuations in voltage. On the premise of realizing the local balance of reactive power, when the voltage fluctuation exceeds a fixed value, in order to maintain the stability of the voltage, a transformer is required to adjust the voltage. [0003] The existing common practice is to realize the voltage adjustment through the on-load tap changer and the switching of the capacitor bank. The schematic diagram is as follows: figure 1 As shown, when the voltage is unstable and needs to be switched, first discon...

AI Technical Summary

Problems solved by technology

This solution has the following disadvantages: 1. Due to the manual switching, the switching accuracy is not enough, and it is easy to cause the problem of reactive power reverse; 2. Manual switching has certain dangers, and the high-voltage isolation switch needs to be checked every time. Shut off, close, the process is more cumbersome

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