Abstract
According to the digital discrete control system of HVDC based on voltage source converter (VSC-HVDC), the discrete model is derived in synchronous dq reference frame. The inner-loop current discrete controller and the related outer loop controller of VSC-HVDC are developed according to the discrete model. In order to compensate the sampling delay of discrete model the inner-loop current controller based on Smith predictor is also presented, and an improved Smith predictor based on estimation error feedback gain in inner loop controller is also developed. The correctness of discrete model and the validities of control strategies are verified by PSCAD/EMTDC simulation.
| Original language | English |
|---|---|
| Pages (from-to) | 6-11 |
| Number of pages | 6 |
| Journal | Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering |
| Volume | 27 |
| Issue number | 28 |
| State | Published - 5 Oct 2007 |
Keywords
- Control
- Discrete model
- High voltage direct current transmission
- Smith predictor
- Time delay compensation
- Voltage source converter