Study on the Effect of Multi-Type Current Transformers Hybrid Operation on Differential Protection of the Bus Based on Dynamic Simulation
- 1 CEPRI, Beijing, China
- 2 CEPRI, Beijing, China
- 3 CEPRI, Beijing, China
- 4 CEPRI, Beijing, China
- 5 CEPRI, Beijing, China
Abstract
This paper analyzes characteristics of multi type current transformers hybrid operation for each branch of the bus and their effects on differential protection of the bus. By theoretically analyzing transmission characteristics of multi type current transformers and their influence factors, we study the dynamic model testing method of multi type current transformers for the bus, and design 3 kinds of testing schemes by making the equivalent model based on the field of P-level current transformer, TPY-level current transformer and electronic current transformer, and build the hybrid operation testing platform of multi type current transformers. Finally, we compare and analyze the transmission characteristics difference of multi type current transformers on the same branch and the characteristics difference of hybrid operation in two successive external faults, analyze the cause behind the differences, and put forward the corresponding improvement measures.
- Yuan, J.X., Sheng, H.L. and Wu, J.Y. (2004) Protection of Current Transformer Application Guide. China Electric Power Press, Beijing.
- DL/T866-2004 (2004) Selection and Calculation of Current Transformer and Voltage Transformer.
- Hou, H., You, D.H., Yin, X.G., Chen, W. and Xu, T.Q. (2006) Influence and Application of Electronic Current Transducer on Distance Protection. Power System Technology, 30, 349-353.
- Ji, H.Q., Zhang, J., Yang, Y.H., Li, Y.S. and Guo, Z.Z. (2006) Comment on Performance of Differential Protection Taking into Account Electronic Current Trans-ducers. Power System Technology, 30, 61-65.
- Luo, S.N., Tian, Z.B. and Zhao, X.C. (2004) Performance Analysis of Air-Core Current Transformer. Proceedings of the CSEE, 24, 108-113.
- Zhou, Z.X., Zhou, C.X., Dong, M.H., Du, D.X. and Zhang, X.L. (2008) Construction of Dynamic Simulation Lab in SGCC Simulation Center and Research of Protective Relay Test. Power System Technology, 32, 50-55.
- Zhou, Z.H., Zhou, C.X., Zhang X.L., et al. (2007) Experimental Study on 1000kV AC System Dynamic Simulation and Relay Protection. China Electric Power Research Institute, Beijing.