基于灵敏度的光储直流配电网电压/网损自适应优化协调控制OA北大核心CSTPCD
Sensitivity-Based Adaptive Voltage/Network Loss-Coordinated Optimal Control in Photovoltaic-Storage DC Distribution Systems
直流配电组网形态对分布式光伏、储能等直流电源具有天然接纳优势,是实现碳达峰、碳中和目标的有效途径之一.分布式光伏随机功率波动易导致直流配电网潮流双向性变化,节点电压频繁越限以及运行网损增大等问题突出.针对含分布式光伏与储能接入的直流配电网(光储直流配电网),提出了计及电压调控与网损优化的协调优化控制策略.首先,分析了光储直流配电网的电压调控特性,并推导出适用于光储直流配电网的电压、网损灵敏度解析表达式;然后,设计了基于灵敏度的光储直流配电网电压校正与网损优化双模式自适应切换的协调优化控制策略,实现对电压源换流器(voltage source converter,VSC)、DC/DC变流器以及储能可控性资源的协同控制,以兼顾对系统网损优化和电压安全控制的要求;最后,通过DIgSILENT和Python仿真与程序设计,基于 33 节点和 69 节点的光储直流配电网模型验证了所提控制策略的有效性.
The configuration of a direct-current(DC)distribution system has prominent advantages in accommodating distributed photovoltaics,energy storage,and other DC power sources,making it an effective approach for achieving emission peaks and carbon neutrality.Random power fluctuations in photovoltaics can cause bidirectional changes in the power flow,frequent voltage beyond the limit,and increased network losses.A sensitivity-based adaptive voltage/network loss-coordinated optimal control strategy is proposed for a DC distribution system with integrated photovoltaics and energy storage(photovoltaic-storage DC distribution system).First,the voltage control characteristics of the photovoltaic-storage DC distribution system were analyzed,and analytical expressions for the voltage and network loss sensitivity suitable for photovoltaic and storage DC distribution networks were derived.Subsequently,a coordinated optimization control strategy based on sensitivity was designed,which included adaptive switching between two modes:voltage correction control and network loss optimization.This strategy performs coordinated control of the voltage source converter(VSC),DC transformer,and controllable energy-storage resources to achieve voltage safety control and network loss optimization.Finally,through simulations and programming combining DIgSILENT and Python,models of 33-node and 69-node photovoltaic-storage DC distribution systems were constructed,and the effectiveness of the proposed control strategy was verified.
李晓庆;张培超;祝炜昊;牛晓光;杨浩;孙正龙
山东电力工程咨询院有限公司,济南市 250013现代电力系统仿真控制与绿色电能新技术教育部重点实验室(东北电力大学),吉林省吉林市 132012
动力与电气工程
直流配电网灵敏度解析电压校正网损优化自适应协调协同控制
DC distribution systemsensitivity analysisvoltage correction controlnetwork loss optimizationadaptive switch controlcooperative optimal control
《电力建设》 2024 (007)
88-99 / 12
This work is supported by the National Key R&D Program of China(No.2021YFB2400800)and Science and Technology Program of Shandong Electric Power Engineering Consulting Institute Co.,Ltd.(No.37202345K0005). 国家重点研发计划项目(2021YFB2400800);山东电力工程咨询院有限公司科技项目(37202345K0005)
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