CAJ | 학술논문

分析了含分布式风场的多分布式电源的配电网支路故障电流特性,对故障定位矩阵算法进行改进优化.该方案对含分布式电源支路进行改进,首先采用故障正序和负序分量幅值之和初始突变量来定位故障相关区域,其次通过比较线路两侧电流幅值变化特性来定位故障.对综合幅值判据进行简化,在实际中采取对含分布式电源支路保护方案进行改进,其他支路保存不变方式减少了设备、节约成本,并且可以定位故障区段.在PSCAD/EMTDC平台上搭建配网模型,在对称及不对称负荷情况下对保护算法进行验证,试验结果证明方案的有效性.
분석료함분포식풍장적다분포식전원적배전망지로고장전류특성,대고장정위구진산법진행개진우화.해방안대함분포식전원지로진행개진,수선채용고장정서화부서분량폭치지화초시돌변량래정위고장상관구역,기차통과비교선로량측전류폭치변화특성래정위고장.대종합폭치판거진행간화,재실제중채취대함분포식전원지로보호방안진행개진,기타지로보존불변방식감소료설비、절약성본,병차가이정위고장구단.재PSCAD/EMTDC평태상탑건배망모형,재대칭급불대칭부하정황하대보호산법진행험증,시험결과증명방안적유효성.
Based on the analysis of fault current characteristics of distribution network branch with DG, matrix algorithm for fault location is optimized. The branch contained with distributed generations is improved. To begin with, fault associated area is located by the initial mutations quantity from sum of positive-sequence component and negative-sequence component rms. What’s more, fault line is located by comparing both sides of the line current amplitude variation characteristics. Comprehensive amplitude is simplified, protection scheme is improved for distributed generations branch, and other branches remain unchanged in order to reduce equipment, keep cost saving, and locate fault line. The typical model is built on PSCAD/EMTDC platform for proving the protection algorithm in both symmetric and asymmetric fault. The simulation results of different fault type results show the effectiveness of this scheme.