The time-varying of load and stochastic variability of distribution generation (DG) deteriorate the voltage control based on real-time reactive power optimization.Voltage and reactive power control strategy for distribution network with the presence of multiple DGs is presented to address the above issue.The nodes' reactive power injections was deduced based on the voltage deviation of real-time detection and the sensitivity matrix of reactive power to voltage deviation,so that the shunt capacitor bank set number can be determined.Optimum transformer tap position is estimated by improved recursive Bayesian approach.The optimum step voltage regulator position is calculated based on the remote terminal unit (RTU) data which are collected from the selected points of distribution feeders.And next moment the control center adjusts the control variables according to a target value which guarantees the real-time character.Simulations are carried on the 33-bus IEEE test system to illustrate that the approach is reliable and with high efficiency,it is also well fit for on-line application.%针对负荷的时变性和分布式电源(DG)出力的波动性使得基于实时无功优化的电压控制效果劣化问题,提出了一种含多DG的配电网电压无功优化控制策略;推导了负荷节点注入无功功率对电压变化的灵敏度矩阵;给出了SCB投切组数的确定方法.基于改进递推贝叶斯估计方法估算最佳的OLTC,利用RTU所获取的相关数据确定各馈线处SVR的分接头开关档位,根据目标值调整控制变量实行自主优化选择和投切控制,达到最优控制方式.以加入多种DG和负荷类型的IEEE33节点典型馈线系统作为仿真算例,分析结果表明所提控制策略能显著地稳定电压幅值,具有较好的在线应用前景.
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