摘要
整县分布式光伏电源的大量开发与利用及分布式电源规模化并网对实现“碳达峰、碳中和”与“乡村振兴”两大国家战略具有重要的现实意义。由于分布式电源发电尖峰和低谷阶段与负荷峰谷时常不同步,进而导致配电系统过/欠电压问题,严重影响了电能质量,甚至威胁系统安全。针对上述问题,本文提出一种基于“先无功–后有功”功率补偿的配电网层级式电压协同控制策略。首先,建立基于“先无功–后有功”功率补偿的配电网层级式电压协同控制框架。其次,结合多微电网节点注入电流与电压的方程与功率–电压灵敏度分析,根据多节点电压越限程度,提出一种基于“先无功–后有功”功率补偿的多智能体协同调节策略,该策略先通过无功补偿器进行无功调节,当电压尚未得到有效治理时,再采用多微电网进行有功调节。再次,为了进一步满足各节点微电网有功功率调节需求,并考虑电网内部源–荷–储运行成本与污染排放,提出一种基于多目标优化的微电网内部分布式源–荷–储优化协调功率控制策略。最后,在MATLAB平台中设计了3种仿真场景以及IEEE测试系统模型对所提控制策略进行了验证。结果表明,所提出的电压协同控制方法在最经济的情况下可以实现各节点电压的综合高效治理,同时,所提出的微电网优化协调功率控制策略能使源–荷–储在绿色经济的供电模式下实时精准地满足电压治理目标下微电网有功调节的需求。仿真实验结果验证了本文所提控制策略的有效性。
The widespread development and integration of distributed photovoltaic power sources across the county,alongside the the large-scale grid connection of these distributed energy sources,play a crucial role in supporting two national strategies:achieving“carbon peaking and neut-rality”and“revitalizing rural areas”.However,The misalignment between the peak and trough phases of distributed power generation and those of the load demand often leads to voltage fluctuations within the distribution system.Such fluctuations not only degrade the quality of power but also pose significant risks to system stability.To mitigate these issues,this study introduces a hierarchical voltage cooperative control strategy for distribution networks based on“reactive power first-active power later”power compensation.Initially,a hierarchical voltage cooperative control framework based on“reactive power first-active power later”power compensation was established.Subsequently,combining the equation of in-jected current and voltage at the nodes of multi-microgrid with power-voltage sensitivity analysis,a multi-intelligent cooperative regulation strategy based on“reactive power first-active power later”power compensation was proposed according to the voltage crossing degree of mul-tiple nodes.In this strategy,reactive power regulation was first performed via reactive power compensator,and then multi-microgrid was used for active power regulation when the voltage had not been effectively governed.Furthermore,in order to further satisfy the active power regulation requirements of each node,and to consider the internal source-load-storage operation cost and pollution emission of the grid,a multi-objective optimization-based distributed internal source-load-storage optimal coordinated power control strategy of the microgrid was proposed.Finally,three simulation scenarios were designed in MATLAB platform and IEEE test system model to validate the proposed control strategy.The results indicated that the proposed voltage cooperative control method facilitates comprehensive and efficient voltage regulation at each node,achieving this under economically optimal conditions.Additionally,the proposed microgrid’s optimal coordinated power control strategy effectively en-sures that source-load-storage meets the microgrid’s active power regulation requirements.This is accomplished in a timely and precise manner,adhering to both green and economic power supply principles.The effectiveness of the proposed control strategy is verified by the simulation results.
作者
贺春光
王涛
杨书强
张菁
安佳坤
郭伟
范文弈
赵杰
王辉
窦春霞
HE Chunguang;WANG Tao;YANG Shuqiang;ZHANG Jing;AN Jiakun;GUO Wei;FAN Wenyi;ZHAO Jie;WANG Hui;DOU Chunxia(Economic and Technological Research Inst.,State Grid Hebei Electric Power Co.,Ltd.,Shijiazhuang 050011,China;Shijiazhuang Power Supply Co.,State Grid Hebei Electric Power Co.,Ltd.,Shijiazhuang 050011,China;Carbon Neutral Advanced Technol.Inst.,Nanjing Univ.of Posts and Telecommunications,Nanjing 210023,China;College of Automation&Artificial Intelligence,Nanjing Univ.of Posts and Telecommunications,Nanjing 210023,China)
出处
《工程科学与技术》
EI
CAS
CSCD
北大核心
2024年第2期26-36,共11页
Advanced Engineering Sciences
基金
国网河北省电力有限公司科学技术项目(SGHEJY00GHJS2100008)。
关键词
配电网
“先无功-后有功”功率补偿
电压协同控制
源-荷-储协调控制
distribution network
“reactive power first-active power later”power compensation
voltage cooperative control
source-load-stor-age coordination control
