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...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。展开更多
串联补偿装置会引发汽轮机组的次同步谐振(subsynchronous resonance,SSR)。提出了一种改进粒子群算法,并基于该算法利用静止无功补偿器(static var compensators,SVC)抑制SSR的原理,选取适当的测试量,设计了次同步阻尼控制器。将SVC的...串联补偿装置会引发汽轮机组的次同步谐振(subsynchronous resonance,SSR)。提出了一种改进粒子群算法,并基于该算法利用静止无功补偿器(static var compensators,SVC)抑制SSR的原理,选取适当的测试量,设计了次同步阻尼控制器。将SVC的控制器参数视为自适应参数,通过改进粒子群算法,以阻尼比为目标函数,计算出不同运行情况下的控制器参数,达到抑制SSR的目的。以南方电网墨红串补、砚崇串补子系统的仿真模型为例,验证了该阻尼控制器的有效性。展开更多
With more and more wind power generation integrated into power grids to replace the conventional turbine-generator (T-G) units,how the subsynchronous resonance (SSR) of conventional T-G units is affected becomes an im...With more and more wind power generation integrated into power grids to replace the conventional turbine-generator (T-G) units,how the subsynchronous resonance (SSR) of conventional T-G units is affected becomes an important technical issue.In this paper,a group of T-G units are interconnected with a series compensated transmission line,and some units are substituted by a nearby DFIG-based wind farm (WF).Under such circumstances,the SSR of power systems would change accordingly.This paper establishes the mathematical model to analyze the torsional interaction (TI) and the induction generator effect of the T-G units.Both eigenvalue analysis and time domain simulations demonstrate the impact of DFIG-based WF on SSR of power systems and how the control parameters of wind farms can affect the SSR.展开更多
文摘采用同步电压反转(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。
文摘串联补偿装置会引发汽轮机组的次同步谐振(subsynchronous resonance,SSR)。提出了一种改进粒子群算法,并基于该算法利用静止无功补偿器(static var compensators,SVC)抑制SSR的原理,选取适当的测试量,设计了次同步阻尼控制器。将SVC的控制器参数视为自适应参数,通过改进粒子群算法,以阻尼比为目标函数,计算出不同运行情况下的控制器参数,达到抑制SSR的目的。以南方电网墨红串补、砚崇串补子系统的仿真模型为例,验证了该阻尼控制器的有效性。
文摘With more and more wind power generation integrated into power grids to replace the conventional turbine-generator (T-G) units,how the subsynchronous resonance (SSR) of conventional T-G units is affected becomes an important technical issue.In this paper,a group of T-G units are interconnected with a series compensated transmission line,and some units are substituted by a nearby DFIG-based wind farm (WF).Under such circumstances,the SSR of power systems would change accordingly.This paper establishes the mathematical model to analyze the torsional interaction (TI) and the induction generator effect of the T-G units.Both eigenvalue analysis and time domain simulations demonstrate the impact of DFIG-based WF on SSR of power systems and how the control parameters of wind farms can affect the SSR.
