Abstract
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.
| Original language | English |
|---|---|
| Pages (from-to) | 140-146 |
| Number of pages | 7 |
| Journal | Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering |
| Volume | 32 |
| Issue number | 1 |
| State | Published - 5 Jan 2012 |
Keywords
- Fault current
- HVDC thyristor valve
- Reverse recovery
- Voltage stress