TCSC的阻抗控制是实现TCSC其他控制功能的基础。为更好地实现TCSC对命令阻抗的响应,采用了一种新型阻抗控制策略——小脑模型神经网络(Cerebella Model Articulation Controller,CMAC)与PID复合控制策略。该控制策略能够实现被控对象的...TCSC的阻抗控制是实现TCSC其他控制功能的基础。为更好地实现TCSC对命令阻抗的响应,采用了一种新型阻抗控制策略——小脑模型神经网络(Cerebella Model Articulation Controller,CMAC)与PID复合控制策略。该控制策略能够实现被控对象的逆动态模型,同时保证系统能有效地抑制扰动,具有足够的稳定性。在Matlab/Simulink仿真环境下搭建两区域四机系统进行仿真,结果证实了该控制策略的有效性。展开更多
This paper analyzes the fundamental frequency impedance presents a novel transmission line pilot protection scheme characteristic of a thyristor controlled series capacitor （TCSC） and based on fault component integr...This paper analyzes the fundamental frequency impedance presents a novel transmission line pilot protection scheme characteristic of a thyristor controlled series capacitor （TCSC） and based on fault component integrated impedance （FCII） calculated for a transmission line with TCSC and controllable shunt reactor （CSR）. The FCII is defined as the ratio of the sum of the fault component voltage phasors of a transmission line with TCSC and CSR to the sum of the fault component current phasors where all the phasors are determined at both line＇s terminals. It can be used to distinguish internal faults occurring on the line from external ones. If the fault is an external one the FCII reflects the line＇s capacitive impedance and has large value. If the fault is an internal one on the line the FCII reflects the impedance of the equivalent system and the line and is relatively small. The new pilot protection scheme can be easily set and has the fault phase selection ability and also it is not affected by the capacitive current and the fault transition resistance. It is not sensitive to compensation level and dynamics of TCSC and CSR. The effectiveness of the new scheme is validated against data obtained in ATP simulations and Northwest China 750 kV Project.展开更多
文摘TCSC的阻抗控制是实现TCSC其他控制功能的基础。为更好地实现TCSC对命令阻抗的响应,采用了一种新型阻抗控制策略——小脑模型神经网络(Cerebella Model Articulation Controller,CMAC)与PID复合控制策略。该控制策略能够实现被控对象的逆动态模型,同时保证系统能有效地抑制扰动,具有足够的稳定性。在Matlab/Simulink仿真环境下搭建两区域四机系统进行仿真,结果证实了该控制策略的有效性。
基金supported by the National Natural Science Foundation of China (Grant Nos.50877061 and 51037005)
文摘This paper analyzes the fundamental frequency impedance presents a novel transmission line pilot protection scheme characteristic of a thyristor controlled series capacitor （TCSC） and based on fault component integrated impedance （FCII） calculated for a transmission line with TCSC and controllable shunt reactor （CSR）. The FCII is defined as the ratio of the sum of the fault component voltage phasors of a transmission line with TCSC and CSR to the sum of the fault component current phasors where all the phasors are determined at both line＇s terminals. It can be used to distinguish internal faults occurring on the line from external ones. If the fault is an external one the FCII reflects the line＇s capacitive impedance and has large value. If the fault is an internal one on the line the FCII reflects the impedance of the equivalent system and the line and is relatively small. The new pilot protection scheme can be easily set and has the fault phase selection ability and also it is not affected by the capacitive current and the fault transition resistance. It is not sensitive to compensation level and dynamics of TCSC and CSR. The effectiveness of the new scheme is validated against data obtained in ATP simulations and Northwest China 750 kV Project.
