STATCOM提高系统暂态稳定及阻尼的动模实验研究

TRANSIENT STABILITY ENHANCEMENT AND DAMPING IMPROVEMENT BY STATCOM PHYSICAL EXPERIMENTAL STUDY

介绍了在清华大学±１０ｋｖａｒｓｔａｔｉｃ Ｓｙｎｃｈｒｏｎｏｕｓ Ｃｏｍｐｅｎｓａｔｏｒ（ＳＴＡＴＣＯＭ） 动模装置上最新的实验结果。在系统发生故障时，ＳＴＡＴＣＯＭ 如何向系统贡献力量是本文主要研究的问题。从系统解列固然可以保护ＳＴＡＴＣＯＭ 自身安全，但却由于太长的恢复时间而丧失了其在系统最需要电压支持时可以快速吞吐无功的优点，并介绍了ＳＴＡＴＣＯＭ 在异常工况下脉冲封锁、快速恢复技术的动模实验结果。在该技术的基础上，还报道了ＳＴＡＴＣＯＭ 用以提高系统暂态稳定和增强系统阻尼的动模实验结果，证明了ＳＴＡＴＣＯＭ 可提高输电系统传输容量极限，实验还验证了ＳＴＡＴＣＯＭ

This paper presents a series of physical experiments performed on a ±10?kvar Static Synchronous Compensator(STATCOM) model developed by Tsinghua University. Harmonic analysis, step response, pulse blocking, transient stability enhancement and damping improvement of power system by using STATCOM are all reported in this paper. It is proved that the voltage feedback controlled STATCOM can enhance the transient stability and increase the synchronizing torque coefficient considerably, however, it is helpless to the improvement of damping. By introducing a auxiliary signal, the delivered active power through the transmission lines as an example in this paper, the STATCOM can suppress the power swings effectively. It is believed that these basic but important experimental experiences will be directly applicable to the operation of the ±20?Mvar STATCOM commissioned in China.