含分布式光伏的主动配电网电压分布式优化控制

针对高比例分布式光伏接入配电网所带来的电压越限问题,提出一种含分布式光伏的主动配电网电压分布式优化控制策略.根据配电网支路潮流模型和光伏逆变器控制模型,构建以节点电压偏差、光伏削减量和网损最小为目标的主动配电网电压优化控制模型;利用二阶锥松弛技术对所构建的模型进行凸化处理;针对集中式优化控制存在计算复杂度高和信息私密性...

Distributed optimal control of voltage in active distribution network with distributed photovoltaic

As for the problem of voltage over-limit due to the high penetration of PV(PhotoVoltaic) integrated into distribution network, a distributed optimal control strategy of voltage in active distribution network with distributed PV is proposed. Based on the branch flow model of distribution network and PV inverter control model, an optimal control model of voltage in active distribution network is formulated, which takes the minimum of the voltage deviation of each bus, PV curtailment and network loss as the objective. Then, SOC(Second-Order Cone) relaxation technique is employed to convert the developed model from nonconvex to convex model. In view of the disadvantages of high computation complexity and poor information privacy for the centralized optimal control, the distribution network partition is achieved based on the decomposition and coordination principle, and then the multi-region distributed cooperative optimization control framework of voltage based on ADMM(Alternating Direction Method of Multipliers) is constructed. Furthermore, to improve the convergence of the algorithm, an accelerated ADMM is proposed based on the residual balance principle and relaxation technique. Finally, the case analysis is conducted on the IEEE 33-bus test system, and the results show that the proposed method can effectively solve the problem of voltage over-limit, and reduce the network loss.