考虑电池储能老化和需求侧响应的交直流混合配电网动态重构方法

现有的电池储能模型一方面认为电池的充放电功率和效率为固定不变的，另一方面有关电池储能的充放电过程对循环老化的影响缺少考虑，这与电池单元本体的非线性等效电路模型相违背。因此，考虑电池储能的循环老化成本、需求侧响应，提出了交直流混合配电网动态重构方法。通过对实际电池储能的充放电功率的运行区域进行采样，在凸包络的采样点集合中将非理想状态下的电池储能模型重构为线性模型。在此基础上，分别建立了基于累积吞吐电量和放电深度的循环老化成本模型，构建了综合成本最小化的交直流混合配电网动态重构模型。并采用混合整数二阶锥规划方法求解。在改进的33节点算例上仿真验证了所提基于放电深度的循环老化成本模型的经济性，分析了交直流混合配电网重构方法经济性的影响因素。

Dynamic reconfiguration of an AC/DC hybrid distribution network considering battery energy storage aging and demand response

The existing battery energy storage model considers that the charging and discharging power and efficiency of the battery are fixed. On the other hand, the impact of the charging and discharging process on the cycle aging is not considered. This is contrary to the nonlinear equivalent circuit model of the battery cell body. Therefore, considering the cycle aging cost of the battery energy storage and demand response, this paper proposes a dynamic reconfiguration method of the AC/DC hybrid distribution network. By sampling the operational area of the actual battery energy storage charging and discharging power, a non-ideal battery energy storage model is reconstructed into a linear model in the convex envelope sampling point set. From this a cycle aging cost model based on the cumulative throughput and discharge depth is established, and the dynamic reconfiguration model of the AC/DC hybrid distribution network with minimum comprehensive cost is constructed. The mixed integer second-order cone programming method is used to solve the problem. The economics of the cycle aging cost model based on the depth of discharge proposed in this paper is verified by simulation on a modified 33-bus example, and the factors affecting the economics of the AC/DC hybrid distribution network reconfiguration method are analyzed.