Title :
Modeling of transient overvoltages in wind power plants
Author :
Liu, B. ; Tang, W.H. ; Chen, X.D. ; Wu, Q.H.
Author_Institution :
Sch. of Electr. Power Eng., South China Univ. of Technol., Guangzhou, China
Abstract :
Compared with conventional power plants, wind power plants (WPP) have their own characteristic, which are more vulnerable to transient overvoltages. Transient overvoltages may contribute to insulation failures of step-up transformers. In WPPs, the transient overvoltage is mainly caused by switching operations of vacuum circuit breakers. In this paper, suitable models for the simulation of transient overvoltages are developed. A detailed model of vacuum circuit breaker, which is required to simulate both the capability of high-frequency current interruption and the withstand capability of transient recovery voltage, is developed. Input parameters for cable models are calculated on the basis of the parameters of actual cables. A wide band transformer model is also proposed for studying the transient behaviors in WPPs. Simulations of transient overvoltages during circuit breaker switching operations in WPP have been carried out in PSCAD/EMTDC. In case studies, it considers some influence factors of transient overvoltages, such as the length of cable feeders and the collector system topology adopted in WPPs. The results obtained from this research can be used as a reference for the insulation level designation of electrical components in WPPs.
Keywords :
overvoltage protection; power system simulation; power transformers; vacuum circuit breakers; wind power plants; EMTDC; PSCAD; cable feeders; cable models; circuit breaker switching operations; collector system topology; electrical components; high-frequency current interruption; insulation failures; insulation level designation; step-up transformers; transient overvoltages; transient recovery voltage; vacuum circuit breakers; wide band transformer model; wind power plants; withstand capability; Integrated circuit modeling; Power cables; Power transformer insulation; Surges; Topology; Transient analysis; Wind power plant; collector system topology; transformer insulation; transient overvoltage; vacuum circuit breaker;
Conference_Titel :
Power and Energy Engineering Conference (APPEEC), 2014 IEEE PES Asia-Pacific
DOI :
10.1109/APPEEC.2014.7066072