Abstract
Since the detailed model simulation of electric elements with converter has great calculation load, its scale and speed could not be easily enhanced, aiming at which, a rapid fault transient simulation method is proposed for relay protection. The functions and control strategy of converter are analyzed and its simplified mathematical model is obtained based on the active power conservation law, which keeps its functions and control characteristics and neglects its internal complex structure. By discretizing the simplified model equations, the iterative equations of output power-frequency components are obtained for the electric elements with converter. The proposed method avoids the use of plentiful separated power electronic devices and trigger units, which reduces the complexity of simulation model, lowers the computational load of converter simulation and enhances the simulation speed. Its feasibility and rapidity are verified by the results of PSCAD simulation.
| Original language | English |
|---|---|
| Pages (from-to) | 90-94 and 130 |
| Journal | Dianli Zidonghua Shebei/Electric Power Automation Equipment |
| Volume | 35 |
| Issue number | 8 |
| DOIs | |
| State | Published - 10 Aug 2015 |
Keywords
- Computer simulation
- Electric converters
- Electric elements
- Large-scale system
- Models
- Relay protection
- Transients