Application Of Automatic Voltage Control System In Hengshui Power Grid

With the vigorous development of China’s industry, the electric power load demand increases unceasingly, network scale is expanding, control center and substation with load fluctuations on the voltage and reactive power regulation is more and more frequent, rely on operation personnel to manually adjust the voltage and reactive power compensation mode has been unable to meet the requirements of power network and the user. In this situation, automatic voltage control system (hereinafter referred to as AVC system) came into being, because the fluctuation of grid voltage, not easy to control, so the research of AVC system has never stopped in the international. While the AVC system before commissioning of Hengshui power grid, the reactive power and voltage control mode based on the substation site compensation, lack of coordination between the neighboring substation, not able to deal effectively with the problem of reactive power optimization in the whole network, can not achieve the optimal operation of power grid. At the same time, each in the substation device fragmentation, maintenance defects, device itself is not in place or different manufacturers, different communication protocols, easily lead to frequent action, equipment area reactive power deficiency or excessive reactive power.This paper presents a method for reactive power optimization control mode is optimized on the basis of grid voltage. First of all, combined with the advanced development of the characteristics and the current AVC system of domestic and foreign power grid, the paper expounds the significance of building a AVC system, analysis and control methods at home and abroad, the control strategy of the AVC system; secondly, based on analyzing the method of control strategy of AVC system at home and abroad, compares the nine zone diagram based on the "calculation method" and the advantages and disadvantages OPF calculation of the AVC system design method based on the principle of "", and put forward the comprehensive advantages of the two kinds of methods of "no control method of reactive power optimization based on" control mode; again, this work studies how to practical application of this control method to improve the existing AVC system; finally, the improved system practical application summary and benefit to verify the improved system running effect.Through the actual operation of the system show that the improved AVC system to reduce the power consumption at the same time, reduces the working intensity of dispatchers. Not only that, the average decrease comparing AVC system loss rate, improved than before improvement was reduced by 0.033 percentage points, has the certain economic efficiency and promotion of value.