摘要
特高压直流以其快速、灵活的调控特点成为电网运行中有效的控制手段,结合实际电网,研究特高压直流控制在电网安全防御的作用及功能尤其必要。结合中国典型的受端电网"强直弱交"实际场景,仿真分析了强直流冲击弱交流的安全稳定风险,提出了应对直流闭锁风险的特高压直流参与受端电网三道安全防线的控制策略,包括:特高压直流功率预控;特高压直流与切负荷等安控的紧急协调控制策略;弱交流通道解列后特高压直流与低频减载的协调配合策略等。仿真验证了受端电网的直流闭锁冲击特性及直流参与安控防线策略的合理性。
Ultra high voltage direct current(UHVDC)is characterized by fast and flexible control,thus has been widely adopted to implement effective power control in power systems.It is of great significance to investigate the capability of UHVDC in power system risk defense.The potential risk of power system operation under the condition of weak AC and strong DC is analyzed,which is a typical engineering problem in China.Based on the analysis,the control strategies are proposed that involve UHVDC in the three-defense-line control at the receiving end of power systems,so as to counter the risk of DC blocking.The proposed control strategies include:pre-control of active power of UHVDC,coordinated control of UHVDC and load shedding,coordinated control of UHVDC and under-frequency load shedding in the occurrence of the breaking of weak AC connection.The validity of the proposed methods is verified by simulation.
作者
袁森
陈得治
陈涛
汤伟
马世英
罗亚洲
宋云亭
任建文
訾鹏
王青
李再华
YUAN Sen;CHEN Dezhi;CHEN Tao;TANG Wei;MA Shiying;LUO Yazhou;SONG Yunting;REN Jianwen;ZI Peng;WANG Qing;LI Zaihua(School of Electrical and Electronic Engineering,North China Electric Power University,Baoding 071003,China;China Electric Power Research Institute,Beijing 100192,China;State Grid Chongqing Electric Power Company,Chongqing 400015,China;State Grid Anhui Electric Power Company Ltd.,Hefei 230061,China;North China Branch of State Grid Power Dispatch&Control Center,Beijing 100053,China)
出处
《中国电力》
CSCD
北大核心
2018年第10期72-79,共8页
Electric Power
基金
国家电网公司科技项目(多交流特高压通道强耦合大受端电网稳定控制及系统保护方案研究
XT71-16-043)~~
关键词
强直弱交
直流闭锁
三道防线
直流功率预控
直流功率紧急调制
协调控制
strong DC and weak AC
DC blocking
three defense line
pre-control measures of active power of HVDC
emergency modulation of HVDC
coordinated control
