计及设备损耗成本的含光储配电网分布式电压控制策略

针对分布式光伏接入配电网带来的电压越限问题,考虑电池储能与光伏逆变器的调压经济性,本文基于一致性算法提出一种计及设备寿命损耗成本的分布式电压控制策略。首先,分析光伏逆变器与储能的调压机理,推导出可用于分布式迭代计算的配电网电压灵敏度参数;其次,分别建立储能电池与光伏逆变器的寿命损耗模型,并利用寿命损耗模型推导出单位功率成本模型,再结合电压灵敏度参数构建出单位调压成本模型;然后,以单位调压成本作为一致性变量,设计基于一致性算法的分布式电压控制策略,得到各节点储能与光伏逆变器的功率调节方案。算例结果表明,所提控制策略能够兼顾各节点设备寿命损耗与总体调压经济性,在有效抑制电压越限的前提下充分降低配电网电压控制成本。

Distributed voltage control strategy of distribution network with photovoltaic and energy storage considering equipment loss cost

Aiming at the voltage violation problem caused by distributed photovoltaic connected to the distribution network, a distributed voltage control strategy based on consistency algorithm is proposed considering the economy of voltage regulation of battery energy storage and photovoltaic inverters. Firstly, the voltage regulation mechanism of photovoltaic inverter and energy storage is analyzed, and the voltage sensitivity parameters of distribution network which can be used for distributed iterative calculation are deduced. Secondly, the life loss model of en-ergy storage battery and photovoltaic inverter is established respectively, and the unit power cost model is de-rived by using the life loss model, and then the unit voltage regulation cost model is constructed by combining the voltage sensitivity parameter. Then, with the unit voltage regulation cost as the consistency variable, a dis-tributed voltage control strategy based on the consistency algorithm is designed, and the power regulation scheme of each node''s energy storage and photovoltaic inverter is obtained. The simulation results demonstrate that the proposed control strategy can consider the lifetime loss of each node equipment and the overall voltage regulation economy, and fully reduce the voltage control cost of distribution network on the premise of effective-ly inhibiting voltage violation.