A voltage powerless control system for transformer station and its control method

Abstract

The invention relates to a transformer substation voltage reactive power control system and the method thereof. The invention is characterized in that, with the adoption of a fifteen area diagram control method, the system collects the electrical information such as current, voltage, active power, reactive power, COS Phi, switch position, etc. through a RTU. The electrical information will enter into the control process, when meeting the switching-in requirement. The collected real-time voltage and real-time reactive power are respectively compared with a voltage limiting value and a reactive limiting value to confirm the position of the current system at the fifteen area diagram. If a switched capacitor group or a transformer-conditioning shift is confirmed to meet the control requirement according to the control strategy, then the switched capacitor group or transformer-conditioning shift will carry out the conditioning exit of the transformer-conditioning shift or the switching exit of the capacitor to control the transformer or the capacitor group. The invention can effectively lower the consumption of the prior equipment, promote the voltage qualified rate, eliminate the burden of the working personnel and is applied in the reactive voltage automatic control of the transformer substation.

Description

1. Technical field [0001] The invention belongs to electrical engineering technology, in particular to the improvement of a voltage and reactive power control system of a substation and a control method thereof. 2. Background technology [0002] At present, in the voltage and reactive power control of the substation, the traditional nine-zone map control method is used. The control strategy of the traditional nine-area diagram method is to divide the voltage-reactive power plane into nine areas according to the upper and lower limits of the fixed voltage and reactive power (or the power factor of the substation incoming line terminal). The traditional nine-area diagram method does not consider the reactive power adjustment The impact on voltage and the impact of voltage regulation on reactive power will cause oscillation in the voltage and reactive power control of the substation during actual use, the labor intensity of the staff on duty is high, and the device operates fre...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to design a voltage and reactive power control system and its control method of a substation, so as to overcome the shortcomings of the traditional nine-zone diagram control method that will cause oscillation and frequent device actions in the voltage and reactive power control of the substation

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