抑制次同步谐振的TCSC主动阻尼控制

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。

Active Damping Control of TCSC for Subsynchronous Resonance Mitigation

Thristor controlled series compensator (TCSC) fired by synchronous voltage reversal (SVR) technology would not result in sunchronous resonance (SSR) naturally because of its inherent inductance within the sunsynchronous frequency range. Therefore, TCSC with SVR has been well known as one of the main countermeasures to release the SSR pressure since it was introduced. Even though the operation constrains from SSR could be released by adopting the TCSC, it could not provide active positive damping to the potential SSR risk of power system. A novel supplemental control strategy called active damping control was consequently proposed, which has the ability to lead the TCSC to provide positive damping to mitigate the SSR. Simulation in both time and frequency domain verified the efficiency of the active damping control.