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采用同步电压反转(synchronous voltage reversal,SVR)触发控制的可控串联补偿电容(thristor controlled series compensator,TCSC)本身不会诱发系统的次同步谐振(sub-synchronous resonance SSR),而且因为其在次同步频率范围内固有的感性阻抗特性,一直以来工程中都把TCSC作为一种缓解SSR的有效措施。虽然采用SVR触发的TCSC可缓解系统SSR的压力,但其本身却无法主动抑制SSR,该文提出一种TCSC的附加控制——主动阻尼控制,通过调节TCSC的触发,可使系统在危险振荡模式下向机组提供正值的电气阻尼,从而更好地抑制SSR。时域及频域的仿真也验证了该主动阻尼控制的有效性。
The thristor controlled series compensator (TCSC) triggered by synchronous voltage reversal (SVR) does not by itself induce a sub-synchronous resonance (SSR) of the system, The inherent inductive impedance characteristics in the synchronous frequency range have long been used as an effective measure to mitigate SSR in engineering. Although SVR-triggered TCSC can relieve the pressure of system SSR, it can not inhibit SSR by itself. In this paper, an additional control of TCSC, Active Damping Control, is introduced. By adjusting TCSC triggering, The unit is supplied with a positive electrical damping to better suppress the SSR. Simulations in time domain and frequency domain also verify the effectiveness of the active damping control.