VSC-HVDC抑制串补引发的次同步振荡研究  

Subsynchronous Oscillation Caused by VSC-HVDC for Damping Fixed Series Compensation

作　　者：高本锋[1] 徐坤[1] 肖湘宁[1] 赵成勇[1] 

机构地区：[1]华北电力大学电力系统保护与动态安全监控教育部重点实验室,北京102206

出　　处：《华东电力》2011年第4期556-560,共5页East China Electric Power

基　　金：国家自然科学基金项目(50577024);中央高校基本科研业务费专项资金资助项目(09QX63)~~

摘　　要：与传统的HVDC相比,基于电压源换流器的高压直流输电技术(VSC-HVDC)具有有功、无功独立控制、方便迅速的优点。从VSC-HVDC的原理出发,分析了其对相邻发电机组电气阻尼特性的影响。结果表明,VSC-HVDC自身能够增强相邻发电机组的电气阻尼特性,但不能从根本抑制串补引发的次同步振荡(Sub-synchronous Oscillation,SSO)问题。提出了在VSC-HVDC系统中配置混合附加阻尼控制器(Hybrid-SSDC,H-SSDC)抑制SSO的方法,并给出了H-SSDC参数整定方法。时域仿真和复转矩系数分析结果表明,采用H-SS-DC后,VSC-HVDC能够有效的抑制串补引发的SSO。Compared with the traditional HVDC,voltage source converter based HVDC transmission technology has the advantages in independent,convenient and fast active and reactive power control,From the perspective of VSC-HVDC operation mechanism,this paper analyzes the impact of VSC-HVDC on its adjacent turbine.Analysis results show that VSC-HVDC can enhance the electric damping of adjacent generators,but can not basically inhibit subsynchronous oscillation（SSO） caused by fixed series compensation.A method of damping SSO using VSC-HVDC equipped with hybrid SSDC is proposed.And its parameter tuning methods is also presented.Time-domain simulation and complex torque coefficient analysis show that VSC-HVDC equipped with hybrid-SSDC can effectively inhibit SSO caused by the fixed series compensation.

关 键 词：高压直流输电 电压源型换流器 次同步振荡 固定串联补偿 附加次同步阻尼控制器 

分 类 号：TM721[电气工程—电力系统及自动化]