基于相变储能系统主动响应能力挖掘的配电网经济调度

Economic dispatch of distribution network based on active response capability mining of phase change material energy storage system

为了解决配电网面临的供电电压不合格和潮流分布欠优等问题,提出基于相变储能系统(PCMTESS)需求响应的配电网经济调度策略。介绍PCMTESS的构造和工作机理,分析热力侧的能耗规律,建立计及热耗散的热力侧和计及无功调节能力的电力侧封装模型。在此基础上,考虑潮流分布约束和分布式新能源出力特性,以配电网的购电成本最小化为目标,在综合考虑光伏、风机、负荷不确定性的条件下,建立统一的配电网调度模型。提出主、子问题交互迭代的求解策略,实现优化模型的高效求解。基于IEEE 41节点配电网的仿真结果表明,所提PCMTESS在维持室温舒适的前提下,能够优化配电网的潮流分布和改善电网的电能质量;所提调度模型为配电网的安全经济调度和综合能源消纳问题的解决提供了一个崭新的视角。

In order to solve the problems of unqualified power supply voltage and poor power flow distribution in distribution network,a PCMTESS(Phase Change MaTerial Energy Storage System)demand response based economic dispatch strategy of distribution network is proposed.The structure and working mechanism of PCMTESS are introduced,the energy consumption law of thermal side is analyzed.The encapsulation model of thermal side considering heat dissipation and the encapsulation model of power side considering reactive power regulation capability are established.On this basis,considering the power flow distribution constraints and the output characteristics of distributed new energy,aiming at the minimum power purchase cost of distribution network,a unified dispatch model of distribution network is established considering the uncertainties of photovoltaic,wind turbine and load.The interactive iterative solution strategy is proposed to realize the efficient solution of the optimization model.Simulative results of IEEE 41-bus distribution net work show that the proposed PCMTESS can optimize the power flow distribution of distribution network and improve the power quality of the power grid under the premise of maintaining room temperature com fort.The proposed dispatch model provides a new perspective for the safe and economical dispatch of dis tribution network and the comprehensive energy consumption.