以高压静止无功补偿器(static var compensator,SVC)为研究对象,针对传统比例-积分-微分(proportional integral differential,PID)控制器难以对设定值进行有变化的跟踪和对扰动进行抑制的缺陷,提出在传统PID控制器的基础上加入一个2阶...以高压静止无功补偿器(static var compensator,SVC)为研究对象,针对传统比例-积分-微分(proportional integral differential,PID)控制器难以对设定值进行有变化的跟踪和对扰动进行抑制的缺陷,提出在传统PID控制器的基础上加入一个2阶微分控制环节以实现公共连接点的电压稳定控制,并采用改进的神经网络粒子群优化算法对控制器的参数进行优化,使得系统瞬态响应性能和控制性能达到最佳。仿真和实验结果验证了所提出的控制方法能够保证快速、无超调的跟踪电压设定值,具有较强的鲁棒性、适应性,提高了SVC系统的补偿精度。展开更多
以高压静止无功补偿器(Static Var Compensator,SVC)为研究对象,针对传统PID控制器难以对设定值进行有变化的跟踪和对扰动进行抑制的缺陷,提出了一种新的非线性神经元PID控制+二阶微分控制算法以实现公共连接点的电压稳定控制,采用改进...以高压静止无功补偿器(Static Var Compensator,SVC)为研究对象,针对传统PID控制器难以对设定值进行有变化的跟踪和对扰动进行抑制的缺陷,提出了一种新的非线性神经元PID控制+二阶微分控制算法以实现公共连接点的电压稳定控制,采用改进的神经元学习算法对控制器的参数进行优化,使得SVC系统的瞬态响应性能和控制性能达到最佳,引入非线性函数消除了系统的超调。实验结果验证了所提出的控制方法能够保证快速、无超调地跟踪电压设定值,具有较强的鲁棒性和适应性,提高了SVC系统的补偿精度。展开更多
For dealing with the resonance fault of ultra-high voltage transformers(UHVTs)with the parallel thyristor controlled reactor(TCR)+the filter compensator(FC)type static var compensator(SVC)caused by dc magnetic biasing...For dealing with the resonance fault of ultra-high voltage transformers(UHVTs)with the parallel thyristor controlled reactor(TCR)+the filter compensator(FC)type static var compensator(SVC)caused by dc magnetic biasing,a simulation model of UHVT with parallel SVC for the frequency analysis of the impedance characteristics and a magnetic-field coupling model for UHVT based on classic Jiles-Atherton hysteresis theories are constructed based on the MATLAB/Simulink platform.Both the theoretical and simulation results prove that the resonance fault is caused by the resonance point on the low-voltage side of the transformer,which will approach the 4th harmonic point under magnetic biasing.Based on the fault analysis,a new resonance control method is proposed by adding reactance with by-pass switches in series with FC branches.Under dc magnetic biasing,the cutoff of the by-pass switch will increase the series reactance rate of the FC branches and change the resonance point.In order to avoid the 7th harmonic increasement caused by this method,the firing angle of the TCR branches is locked between 130°and 180°.The effect of the proposed method is validated by the simulation model of a 750 kV UHVT and the results show that the mechanism analysis of the resonance fault is correct and the resonance control method is valid.展开更多
文摘以高压静止无功补偿器(static var compensator,SVC)为研究对象,针对传统比例-积分-微分(proportional integral differential,PID)控制器难以对设定值进行有变化的跟踪和对扰动进行抑制的缺陷,提出在传统PID控制器的基础上加入一个2阶微分控制环节以实现公共连接点的电压稳定控制,并采用改进的神经网络粒子群优化算法对控制器的参数进行优化,使得系统瞬态响应性能和控制性能达到最佳。仿真和实验结果验证了所提出的控制方法能够保证快速、无超调的跟踪电压设定值,具有较强的鲁棒性、适应性,提高了SVC系统的补偿精度。
文摘以高压静止无功补偿器(Static Var Compensator,SVC)为研究对象,针对传统PID控制器难以对设定值进行有变化的跟踪和对扰动进行抑制的缺陷,提出了一种新的非线性神经元PID控制+二阶微分控制算法以实现公共连接点的电压稳定控制,采用改进的神经元学习算法对控制器的参数进行优化,使得SVC系统的瞬态响应性能和控制性能达到最佳,引入非线性函数消除了系统的超调。实验结果验证了所提出的控制方法能够保证快速、无超调地跟踪电压设定值,具有较强的鲁棒性和适应性,提高了SVC系统的补偿精度。
基金The Science Foundation of State Grid Xinjiang(No.SGTYHT/19-JS-215)。
文摘For dealing with the resonance fault of ultra-high voltage transformers(UHVTs)with the parallel thyristor controlled reactor(TCR)+the filter compensator(FC)type static var compensator(SVC)caused by dc magnetic biasing,a simulation model of UHVT with parallel SVC for the frequency analysis of the impedance characteristics and a magnetic-field coupling model for UHVT based on classic Jiles-Atherton hysteresis theories are constructed based on the MATLAB/Simulink platform.Both the theoretical and simulation results prove that the resonance fault is caused by the resonance point on the low-voltage side of the transformer,which will approach the 4th harmonic point under magnetic biasing.Based on the fault analysis,a new resonance control method is proposed by adding reactance with by-pass switches in series with FC branches.Under dc magnetic biasing,the cutoff of the by-pass switch will increase the series reactance rate of the FC branches and change the resonance point.In order to avoid the 7th harmonic increasement caused by this method,the firing angle of the TCR branches is locked between 130°and 180°.The effect of the proposed method is validated by the simulation model of a 750 kV UHVT and the results show that the mechanism analysis of the resonance fault is correct and the resonance control method is valid.
