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

发布时间：2018-01-16 23:31

本文关键词：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　出处：《电工技术学报》2017年S1期 　论文类型：期刊论文

【摘要】：针对宁夏电网近电气距离耦合的火电机群与多直流输电的简化等值送端系统,利用基于复频域端口等效导纳矩阵的复转矩系数法对其进行次同步振荡(SSO)特性分析。研究表明,降低宁夏电网直流输电外送功率,加强宁夏电网送端交流系统,增强直流换流站之间电气耦合强度等均有利于改善系统SSO阻尼特性。其次,针对存在SSO风险的灵武二期电厂机组,开展直流输电附加次同步阻尼控制器设计,并通过仿真证明了其有效性。该文研究成果可为宁夏电力外送系统的运行、规划及SSO抑制提供技术支撑和参考。
[Abstract]:A simplified equivalent terminal system for thermal power generation cluster and multi-DC transmission system in Ningxia power grid with near electric distance coupling. Using the complex torque coefficient method based on the complex frequency domain port equivalent admittance matrix, the sub-synchronous oscillation (SSO) characteristics are analyzed. The results show that the output power of Ningxia DC transmission system is reduced. Strengthening the AC system of Ningxia power grid, enhancing the electrical coupling between DC converter stations and so on are all conducive to improve the damping characteristics of the system SSO. Secondly, aiming at the unit of Lingwu Phase II Power Plant with SSO risk. The design of additional subsynchronous damping controller for HVDC transmission is carried out, and the effectiveness of the controller is proved by simulation. The research results can provide technical support and reference for the operation, planning and SSO suppression of Ningxia electric power outputting system.
【作者单位】：强电磁工程与新技术国家重点实验室(华中科技大学电气与电子工程学院);国网江苏省电力公司电力科学研究院;国网宁夏电力公司电力科学研究院;
【基金】：国家自然科学基金资助项目(51607092)
【分类号】：TM712
【正文快照】： 0 引言随着高压直流(High Voltage Direct Current,HVDC)输电的广泛应用,与传统火电机组的次同步振荡(Subsynchronous Oscillation,SSO)问题不同,电力系统的次同步振荡现象呈现了新特点[1,2]。根据我国电网未来发展规划,将有多条西电东送高压直流输电工程建成并投入使用,在

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