论文部分内容阅读
针对抑制由HVDC引起的次同步振荡问题,阐述了附加次同步振荡阻尼控制器(SSDC)抑制次同步振荡(SSO)的原理。对SSDC设计中的控制器结构、输入信号的选取、相位补偿和增益调整等方面进行了重点论述,分析了不同方案的优缺点。从工程应用的角度,提出了一种便于工程实现的SSDC设计方案。在此基础上,针对东北-华北联网的高岭背靠背换流站附近绥中发电机组的次同步振荡问题,设计了相应的SSDC。实时数字仿真(RTDS)和实际控制器的闭环试验验证了所设计的SSDC能有效地抑制SSO,并对HVDC的动态特性影响较小。
In order to suppress the subsynchronous oscillation caused by HVDC, the principle of subsynchronous oscillation damping controller (SSDC) suppressing subsynchronous oscillation (SSO) is described. The structure of SSDC controller, input signal selection, phase compensation and gain adjustment are discussed in detail. The advantages and disadvantages of different schemes are analyzed. From the perspective of engineering application, this paper presents a design scheme of SSDC that is easy to implement. On this basis, aiming at the subsynchronous oscillation of Suizhong generator set near the back-to-back converter station in northeast-north China, a corresponding SSDC was designed. The real-time digital simulation (RTDS) and the closed-loop control of the actual controller verify that the designed SSDC can effectively suppress the SSO and has little impact on the dynamic characteristics of the HVDC.