电工技术学报2017，Vol.32Issue(z1)：30-38,9.DOI:10.19595/j.cnki.1000-6753.tces.L70025
宁夏多直流外送系统SSO特性分析及次同步阻尼控制器设计
Sub-Synchronous Oscillation Characteristics Analysis and SSDC Design of Ningxia Multiple DC Transmissions System
摘要
Abstract
For a simplified equivalent sending system with multiple thermal power units and multiple DC transmissions in Ningxia power grid, the complex torque coefficient method is employed based on the complex frequency domain port-equivalence conductance matrix (CPCM) to analyze the damping characteristics of generation units. It is observed that reducing the DC power level or improving the ac system strength of the sending end and strengthening the electrical coupling between dc systems contribute to damping improvement of the system subsynchronous oscillation (SSO). In addition, a subsynchronous damping controller (SSDC) designed is intended to reduce the SSO risk of the turbine-generators in Ningxia power grid. Simulations are conducted to verify the effectiveness of the controller. The research is expected to provide the technical support and guidance for the operation, planning and SSO mitigation of Ningxia power grid.关键词
高压直流输电系统/次同步振荡/复转矩系数法/次同步阻尼控制器Key words
High-voltage direct current/subsynchronous oscillation (SSO)/complex torque coefficient method/subsynchronous damping controller (SSDC)分类
信息技术与安全科学引用本文复制引用
江桂芬,孙海顺,陈霞,朱鑫要,高峰..宁夏多直流外送系统SSO特性分析及次同步阻尼控制器设计[J].电工技术学报,2017,32(z1):30-38,9.基金项目
国家自然科学基金资助项目(51607092). （51607092）
