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Zhou Yefei, Zhao Jinrong(Naming Automation Research institute. Naming 210003, China)  
The principle of substation's voltage and reactive power controller (VQC) is analyzed at first. The regulatingtactics are provided on different control zone of voltage and reactive power, according to integrated influence of voltage andreactive power with tap change and capacitor action. The realization of voltage and reactive power automatic control inunmanned substations with automation systems is illustrated in detail. In conclusion. this paper presents a feasible methodrealizing on a local background computer to optimize voltage and reactive power control for many kinds of substations withdifferent configurations, voltage levels and scales. This method regards one bus as one object of VQC. The locking conditionsof VQC operation may be divided into "remote signal locking'. "remote measured value locking". and "microprocessor--basedprotection signal locking" according to categoly of acquired signals by the supervisory control system. And the remoteSCADA system can monitor and control the VQC operation for unmanned substations.
【CateGory Index】: TM76
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