Emerging sub-synchronous interactions(SSI)in wind-integrated power systems have added intense attention after numerous incidents in the US and China due to the involvement of series compensated transmission lines and ...Emerging sub-synchronous interactions(SSI)in wind-integrated power systems have added intense attention after numerous incidents in the US and China due to the involvement of series compensated transmission lines and power electronics devices.SSI phenomenon occurs when two power system elements exchange energy below the synchro-nous frequency.SSI phenomenon related to wind power plants is one of the most significant challenges to main-taining stability,while SSI phenomenon in practical wind farms,which has been observed recently,has not yet been described on the source of conventional SSI literature.This paper first explains the traditional development of SSI and its classification as given by the IEEE,and then it proposes a classification of SSI according to the current research status,reviews several mitigation techniques and challenges,and discusses analysis techniques for SSI.The paper also describes the effect of the active damping controllers,control scheme parameters,degree of series compensation,and various techniques used in wind power plants(WPPs).In particular,a supplementary damping controller with converter controllers in Doubly Fed Induction Generator based WPPs is briefly pronounced.This paper provides a real-istic viewpoint and a potential outlook for the readers to properly deal with SSI and its mitigation techniques,which can help power engineers for the planning,economical operation,and future expansion of sustainable development.展开更多
可控串联电容补偿(thyristor controlled series capacitor,TCSC)能够控制串联电容器与汽轮发电机轴系之间的能量交换,抑制系统中的次同步分量,从而避免发生次同步谐振的风险。对TCSC抑制次同步谐振(sub-synchronous resonance,SSR)的2...可控串联电容补偿(thyristor controlled series capacitor,TCSC)能够控制串联电容器与汽轮发电机轴系之间的能量交换,抑制系统中的次同步分量,从而避免发生次同步谐振的风险。对TCSC抑制次同步谐振(sub-synchronous resonance,SSR)的2种不同方法,即自然抑制和主动抑制,进行了分析和对比,设计了次同步阻尼控制器,研究了TCSC在不同触发角下及附加了阻尼控制器的主动抑制下对次同步谐振抑制的效果,通过PSCAD/EMTDC对这些方法进行时域仿真发现,2种方法均能有效抑制SSR,而主动抑制的效果更好一些。展开更多
以含串补的交直流混合输电系统为研究对象,通过在交流系统中采取有效措施削弱次同步谐振。首先用可控串联电容补偿器(thyristor-controlled series capacitor,TCSC)代替部分固定串补;然后进行TCSC主电路参数选择和基于相位补偿法的TCSC...以含串补的交直流混合输电系统为研究对象,通过在交流系统中采取有效措施削弱次同步谐振。首先用可控串联电容补偿器(thyristor-controlled series capacitor,TCSC)代替部分固定串补;然后进行TCSC主电路参数选择和基于相位补偿法的TCSC附加次同步阻尼控制器设计;最后用PSCAD/EMTDC软件进行仿真验证。结果表明,该策略可以提高系统阻尼,有效抑制系统的次同步谐振,改善系统的稳定性。展开更多
以高压直流输电系统快速可控为出发点,采用极大极小值原理和改进粒子群优化算法相结合的新方法,针对向家坝—上海±800 k V特高压直流输电系统送端可能发生的次同步振荡(sub-synchronous oscillation,SSO)问题,建立一种基于比例积...以高压直流输电系统快速可控为出发点,采用极大极小值原理和改进粒子群优化算法相结合的新方法,针对向家坝—上海±800 k V特高压直流输电系统送端可能发生的次同步振荡(sub-synchronous oscillation,SSO)问题,建立一种基于比例积分微分控制的UHVDC附加次同步振荡阻尼控制器(subsynchronous oscillation damping controller,SSDC)模型。对不同方式的时域仿真结果表明,该SSDC控制器能够有效抑制交直流互联电网送端系统汽轮机组的轴系扭振,可在相当大范围内保证系统的SSO稳定性,具有较强的鲁棒性。展开更多
基金supported financially by the Ministerio de Ciencia e Innovación(Spain)and the European Regional Development Fund,under Research Grant WindSound project(Ref.:PID2021-125278OB-I00).
文摘Emerging sub-synchronous interactions(SSI)in wind-integrated power systems have added intense attention after numerous incidents in the US and China due to the involvement of series compensated transmission lines and power electronics devices.SSI phenomenon occurs when two power system elements exchange energy below the synchro-nous frequency.SSI phenomenon related to wind power plants is one of the most significant challenges to main-taining stability,while SSI phenomenon in practical wind farms,which has been observed recently,has not yet been described on the source of conventional SSI literature.This paper first explains the traditional development of SSI and its classification as given by the IEEE,and then it proposes a classification of SSI according to the current research status,reviews several mitigation techniques and challenges,and discusses analysis techniques for SSI.The paper also describes the effect of the active damping controllers,control scheme parameters,degree of series compensation,and various techniques used in wind power plants(WPPs).In particular,a supplementary damping controller with converter controllers in Doubly Fed Induction Generator based WPPs is briefly pronounced.This paper provides a real-istic viewpoint and a potential outlook for the readers to properly deal with SSI and its mitigation techniques,which can help power engineers for the planning,economical operation,and future expansion of sustainable development.
文摘可控串联电容补偿(thyristor controlled series capacitor,TCSC)能够控制串联电容器与汽轮发电机轴系之间的能量交换,抑制系统中的次同步分量,从而避免发生次同步谐振的风险。对TCSC抑制次同步谐振(sub-synchronous resonance,SSR)的2种不同方法,即自然抑制和主动抑制,进行了分析和对比,设计了次同步阻尼控制器,研究了TCSC在不同触发角下及附加了阻尼控制器的主动抑制下对次同步谐振抑制的效果,通过PSCAD/EMTDC对这些方法进行时域仿真发现,2种方法均能有效抑制SSR,而主动抑制的效果更好一些。
文摘以含串补的交直流混合输电系统为研究对象,通过在交流系统中采取有效措施削弱次同步谐振。首先用可控串联电容补偿器(thyristor-controlled series capacitor,TCSC)代替部分固定串补;然后进行TCSC主电路参数选择和基于相位补偿法的TCSC附加次同步阻尼控制器设计;最后用PSCAD/EMTDC软件进行仿真验证。结果表明,该策略可以提高系统阻尼,有效抑制系统的次同步谐振,改善系统的稳定性。
