| With the construction of u HV substation of power system,long-distance transmission and the putting into use of large-capacity units,higher requirements have been put forward for reactive power/Voltage regulation.That is to say,the safety,quality and economy can be optimized at the same time,which is also the ultimate goal of AVC(Automatic Voltage Control).Shijiazhuang grid in front of the AVC system put into operation,shijiazhuang area due to the effect of high temperature in summer and heating in winter,peak valley load fluctuation is bigger,lead to voltage distribution,to provide high quality electricity,network loss is relatively large,so the introduction of the AVC system,for applied research and found in the use of this system to resolve the problem,in shijiazhuang area of voltage stability has important significance.In this paper,the principle of voltage and reactive power regulation is simply described by deducing the formula of the brief model of substation,and the control strategies currently used in substation are illustrated in the nine-zone diagram and seventeen-zone diagram.This paper briefly describes the AVC reactive power optimization algorithm of regional power grid,briefly introduces the basic structure of AVC system of regional power grid,formulates corresponding control strategies according to the actual operation situation of Shijiazhuang regional power grid,introduces the main operation interfaces and optimizes AVC system.Finally,according to the actual operation situation of Shijiazhuang,the AVC system of Shijiazhuang is put into construction and functional test.This paper analyzes the influence of AVC on voltage qualification rate,line loss and equipment operation times of Shijiazhuang power grid,and after verifying that AVC system has good regulation and control function in Shijiazhuang area,makes a brief summary of the problems existing in its specific use.Finally,the future development of AVC system is briefly prospected. |
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