高压配电网无功/电压的日分段综合优化控制

Time-interval Based Comprehensive Control Strategy for Daily Voltage/VAR Optimization in Distribution Systems

为了给出配电网全天无功/电压优化调度方案,提出了一种参照电容器最大允许动作次数对次日控制时段进行划分的启发式算法,该算法综合考虑降损效益和有载调压变压器(OLTC)、并联补偿电容器的操作费用。在优化分段的基础上,根据各控制时段内不同时刻的网损及电压质量,再决定是否用OLTC进行二次调节。某实际系统的算例结果表明,所述算法及控制策略能在满足电压质量、降低网络损耗的同时,有效地简化了无功电压调节设备的操作。

A new time-interval based comprehensive optimization control strategy is presented for reducing the daily energy loss, improving the voltage quality and simplifying the operations of on-load tap changer （OLTC） and shunt capacitor （SC）. The algorithm considers not only the reduction of energy loss but also the operation cost of OLTCs and SCs. A heuristic and iterative algorithm is introduced to determine the control period of the next day, in which the number of the control period depends on the maximal allowable switching times of SCs. After the partition results being achieved, a secondary control strategy of the OLTCs is implemented depending on the voltage quality and energy loss reduction in the period of specified interval. Case studies illustrate that the proposed partition algorithm and control strategy can effectively reduce the daily energy loss, improve the voltage quality and simplify the control operations.