文章摘要
唐晓骏,张正卫,韩民晓,等.支撑城市电网分区互联的柔性直流优化控制技术[J].电力系统自动化,2019,43(12):179-185. DOI: 10.7500/AEPS20180925006.
TANG Xiaojun,ZHANG Zhengwei,HAN Minxiao, et al.Optimization Control Technology of VSC-HVDC Supporting Partition Interconnection of Urban Power Grid[J].Automation of Electric Power Systems,2019,43(12):179-185. DOI: 10.7500/AEPS20180925006.
支撑城市电网分区互联的柔性直流优化控制技术
Optimization Control Technology of VSC-HVDC Supporting Partition Interconnection of Urban Power Grid
DOI:10.7500/AEPS20180925006
关键词: 城市电网  柔性互联  自适应下垂控制  紧急功率支援
KeyWords: urban power grid  flexible interconnection  adaptive droop control  emergency power support
上网日期:2019-04-26
基金项目:国家自然科学基金资助项目(51777196);国家电网公司科技项目(XTB11201703025)
作者单位E-mail
唐晓骏 华北电力大学电气与电子工程学院, 北京市 102206  
张正卫 华北电力大学电气与电子工程学院, 北京市 102206
电网安全与节能国家重点实验室(中国电力科学研究院有限公司), 北京市 100192 
zhang-zhengwei@qq.com 
韩民晓 华北电力大学电气与电子工程学院, 北京市 102206  
王璟 国网河南省电力公司, 河南省郑州市 450052  
谢岩 电网安全与节能国家重点实验室(中国电力科学研究院有限公司), 北京市 100192  
田春筝 国网河南省电力公司, 河南省郑州市 450052  
摘要:
      针对城市电网分层分区网架供电能力不足、负载不均衡、安全可靠性差等问题,提出一种支撑城市电网分区互联的柔性直流优化控制策略。首先,针对城市电网安全经济运行需求建立了稳态和暂态优化控制目标;其次,建立了计及负载均衡和网络损耗的综合评价指标,采用逐步逼近法快速求解柔性直流最优功率,以实现稳态下城市电网潮流最优控制;设计了基于换流站功率裕度的多端柔性直流自适应下垂控制策略,合理分配故障后各分区紧急功率支援,同时减小直流电压偏差。以郑州城市电网实际算例仿真验证了所提方法的有效性和工程实用性。
Abstract:
      Aiming at the problems of insufficient power supply capacity, unbalanced load and poor safety and reliability of urban grid voltage-grading and district-dividing structure, an optimal control strategy of voltage source converter based high voltage direct current(VSC-HVDC)supporting the partition interconnection of urban power grid is proposed. Firstly, the steady-state and transient-state optimization control objectives are established for the safe and economic operation requirements of urban power grids. Secondly, a comprehensive evaluation index considering load balancing and network loss is established, and the step-by-step approximation method is used to quickly solve the VSC-HVDC optimal power so as to achieve optimal power flow control of urban power grid in steady state. A multi-terminal HVDC adaptive droop control strategy based on the power margin of converter station is designed, which can reasonably allocate emergency power support in each partition after fault and reduce DC voltage deviation. The effectiveness and engineering practicability of the proposed method are verified through the actual example of Zhengzhou urban power grid of China.
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