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为了解决变电站电压无功在线控制中补偿调压设备频繁动作问题,提出了一种根据电压无功偏差值和变化速率对日控制时段进行自适应划分的模糊解耦在线控制新方法。引入三次样条插值拟合技术对预测值进行动态拟合校正,根据电压无功偏差值和变化速率对负荷(或电压)曲线自适应分段,将电压无功控制解耦为电容器子控制和分接头子控制,使得短期负荷预测与在线模糊控制有机结合,避免了负荷波动和传统9区图控制缺陷导致的不必要动作,实现了补偿调压设备有限调节次数下变电站全天在线控制。仿真结果验证了本文所提出的算法的正确性、有效性,为电压无功在线控制提供了一种思路。
In order to solve the problem of frequent operation of compensation voltage regulator in on-line control of substation voltage and reactive power, a new method of fuzzy decoupling on-line control based on adaptive control of voltage and reactive power deviation and variation rate is proposed. The cubic spline interpolation fitting technique is introduced to dynamically fit and predict the predicted values. According to the voltage reactive variation and the rate of change, the load (or voltage) curve is adaptively segmented, and the voltage reactive power control is decoupled into the capacitor sub-control and Tap control makes short-term load forecasting and online fuzzy control organically combine to avoid the load fluctuation and unnecessary control caused by the traditional 9-area map control. It realizes the on-line control of substation with limited number of times of regulating voltage regulating equipment. The simulation results verify the correctness and validity of the proposed algorithm and provide an idea for online control of voltage and reactive power.