Static var compensators （SVCs） are used for voltage and reactive power control in power systems. In this paper, we will consider the structure of SVCs that mainly consists of Y-connection of mechanically-switched ca...Static var compensators （SVCs） are used for voltage and reactive power control in power systems. In this paper, we will consider the structure of SVCs that mainly consists of Y-connection of mechanically-switched capacitor （MSC） and delta connection of thyrister-controlled reactor （TCR）. First, the control model of SVC was established in this paper. Then, a novel optimal nonlinear voltage controller for SVCs is proposed. The proposed SVC voltage controller consists of a nonlinear function and a conventional PI controller. The improved simplex method （SPX） is presented to adjust and optimize the parameters of the nonlinear PI controller in real-time, and to make transient state response procedure of SVC optimum. The integration of time multiplied absolute error （ITAE） is adopted as the optimized objective function of SPX. Simulation and engineering application results show that the proposed voltage control method is able to track reference voltage value of SVC immediately. It also demonstrates that the whole SVC control System can synthetically compensate reactive power.展开更多
通过对含静止无功补偿器(static var compensator,SVC)的单机无穷大(single machine infinite-bus,SIMB)系统进行电磁转矩计算,从理论上分析SVC的电压控制和阻尼调节之间的相互作用关系,既要保证同时为系统提供正的同步转矩和阻尼转矩,...通过对含静止无功补偿器(static var compensator,SVC)的单机无穷大(single machine infinite-bus,SIMB)系统进行电磁转矩计算,从理论上分析SVC的电压控制和阻尼调节之间的相互作用关系,既要保证同时为系统提供正的同步转矩和阻尼转矩,电压控制增益和阻尼控制增益的取值需满足一定的限制关系。通过对PSASP中36节点系统进行特征值分析,从广义阻尼的角度分析SVC控制参数对系统阻尼的影响。分析结果表明,电压控制增益和时间常数可改变系统的总阻尼,阻尼控制增益只能对系统的阻尼特性进行重新配置,从而改善系统的弱阻尼区间振荡模式。仿真验证了上述结论的有效性。展开更多
在电力系统仿真软件DIgSILENT/PowerFactory中建立了静止无功补偿器(static var compensator,SVC)补偿型定速风电机组的模型,分析了其稳态和暂态特性以及由SVC补偿型风电机组组成的风电场对电网的影响,分别采用上述风电机组模型和用电...在电力系统仿真软件DIgSILENT/PowerFactory中建立了静止无功补偿器(static var compensator,SVC)补偿型定速风电机组的模型,分析了其稳态和暂态特性以及由SVC补偿型风电机组组成的风电场对电网的影响,分别采用上述风电机组模型和用电容器组进行补偿的普通定速风电机组模型进行仿真实验,比较结果表明SVC补偿型风电机组具有快速调节无功功率的能力,当系统故障时,该风电机组可快速恢复系统电压,且风电机组启动过程对系统的冲击较小。展开更多
基金supported by the National Basic Research Program of China (973 Program) (No. 2009CB219706)the Scientific Research Plan of Hunan Provincial Science and Technology Department of China (Nos. 2009FJ3036, 2011FJ3035)
文摘Static var compensators （SVCs） are used for voltage and reactive power control in power systems. In this paper, we will consider the structure of SVCs that mainly consists of Y-connection of mechanically-switched capacitor （MSC） and delta connection of thyrister-controlled reactor （TCR）. First, the control model of SVC was established in this paper. Then, a novel optimal nonlinear voltage controller for SVCs is proposed. The proposed SVC voltage controller consists of a nonlinear function and a conventional PI controller. The improved simplex method （SPX） is presented to adjust and optimize the parameters of the nonlinear PI controller in real-time, and to make transient state response procedure of SVC optimum. The integration of time multiplied absolute error （ITAE） is adopted as the optimized objective function of SPX. Simulation and engineering application results show that the proposed voltage control method is able to track reference voltage value of SVC immediately. It also demonstrates that the whole SVC control System can synthetically compensate reactive power.
文摘通过对含静止无功补偿器(static var compensator,SVC)的单机无穷大(single machine infinite-bus,SIMB)系统进行电磁转矩计算,从理论上分析SVC的电压控制和阻尼调节之间的相互作用关系,既要保证同时为系统提供正的同步转矩和阻尼转矩,电压控制增益和阻尼控制增益的取值需满足一定的限制关系。通过对PSASP中36节点系统进行特征值分析,从广义阻尼的角度分析SVC控制参数对系统阻尼的影响。分析结果表明,电压控制增益和时间常数可改变系统的总阻尼,阻尼控制增益只能对系统的阻尼特性进行重新配置,从而改善系统的弱阻尼区间振荡模式。仿真验证了上述结论的有效性。
基金中国风电项目（wind power research and training,CWPP）的资助
文摘在电力系统仿真软件DIgSILENT/PowerFactory中建立了静止无功补偿器(static var compensator,SVC)补偿型定速风电机组的模型,分析了其稳态和暂态特性以及由SVC补偿型风电机组组成的风电场对电网的影响,分别采用上述风电机组模型和用电容器组进行补偿的普通定速风电机组模型进行仿真实验,比较结果表明SVC补偿型风电机组具有快速调节无功功率的能力,当系统故障时,该风电机组可快速恢复系统电压,且风电机组启动过程对系统的冲击较小。
