联于海岛弱交流系统的直流输电系统稳态优化控制策略  

Improved steady-state control strategies of HVDC system connected to weak AC system on island

作　　者：彭发喜 黄伟煌 刘涛 辛清明 雷博 PENG Fa-xi;HUANG Wei-huang;LIU Tao;XIN Qing-ming;LEI Bo;XU Shu-kai(State Key Laboratory of HVDC,Electric Power Research Institute,CSG,Guangzhou 510663,China)

机构地区：[1]直流输电技术国家重点实验室,南方电网科学研究院,广东广州510663

出　　处：《能源工程》2021年第6期74-78,共5页Energy Engineering

基　　金：2019年南方电网科学研究院基础性前瞻性科技项目(SEPRI-K194003)。

摘　　要：近年来国内建设的常规直流输电工程主要联于交流系统较强的陆上主网,联于海岛弱交流系统的常规直流输电工程设计和建设经验较少。相比于陆上交流电网,海岛交流电网的规模小、强度低,交直流相互影响也更加严重。针对直流输电系统联于海岛弱交流系统面临的频繁潮流反转、易于换相失败和交流电压波动大等问题提出了三种稳态优化控制策略,包括在线功率反转、增大γ角和抑制交流电压波动等。最后,在PSCAD/EMTDC平台上搭建直流输电系统的仿真模型,仿真验证了所提稳态优化控制策略的有效性和可行性。HVDC projects are usually connected to strong AC grid on land,fewer cases for design and construction of HVDC project connecting to weak AC grid on island can be found.Compared to AC grid on land,the island AC grid is smaller in scale,weaker in intensity,and being more vulnerable to the interaction between AC and DC system.In order to address the challenge caused by HVDC system connected to weak AC system on island,such as frequent power reversal,commutation failure and AC voltage fluctuation,three improved steady-state control strategies are proposed,including the online power reversal,gamma angle increasing and AC voltage fluctuation suppression.Finally,the simulation model is built on PSCAD/EMTDC platform to verify the effectiveness and feasibility of the above improved steadystate control strategies.

关 键 词：海岛 弱交流系统 高压直流输电 稳态优化控制 

分 类 号：TM721[电气工程—电力系统及自动化]