Analysis on reverse voltage characteristics of HVDC thyristor valves in the fault state

作者：Xie Ting^*; Tang Guangfu; Zheng Jianchao; Zha Kunpeng; Gao Chong

来源：Proceedings of the CSEE, 2012, 32(1): 140-146.

• Circuit topology analysis
• Current rate
• Damping parameters
• Damping resistance
• Forward currents
• HVDC thyristor valve
• Junction temperatures
• Mathematic model
• Mathematics model
• Reverse recovery
• Reverse recovery charge
• Reverse voltages
• Simulation methods
• Thyristor valves
• Voltage stress

The reverse voltage characteristic of HVDC thyristor valve on the state of fault current was analyzed. A mathematics model was put forward by using circuit topology analysis, which can be validated by test. The influence of thyristor junction temperature, current rate of change, forward current and damping parameters was studied and simulated by implementing the mathematic model. The results show that thyristor junction temperature, current rate of change and forward current can change and influence the reverse recovery charge and voltage. When the damping capacitance is constant, a unique value of damping resistance can be achieved leading to the minimal reverse recovery voltage. The feasibility of the simulation method is verified by tests and high accuracy is achieved.

• 出版日期2012
• 单位清华大学