中国电机工程学报2018，Vol.38Issue(3)：716-726,后插6,12.DOI:10.13334/j.0258-8013.pcsee.162218
考虑分布式电源稳定助增效应的电压修正反时限过电流保护方案
A Voltage Correction based Inverse-time Overcurrent Protection Scheme Considering Distributed Generation Stable Infeed Effect
摘要
Abstract
To solve the problem that traditional protection scheme can hardly satisfy the requirements of both coordination and sensitivity with distributed generation (DG) infeed effect, the operating behavior characteristics of inverse-time overcurrent protection with the changing of fault location with and without DG connection were revealed. The impacts of DG to the performance of inverse-time overcurrent protection were analyzed. A voltage correction based inverse-time overcurrent (VCITO) protection method with high sensitivity was proposed in this paper. Voltage correction factor and voltage correction gradient exponent, which are constructed based on the voltage natural distribution under fault and the change law of measuring voltage with the changing of fault location, was used to correct the inverse-time characteristic curve. The operating time of VCITO protection was obtained based on local information and it can ensure the coordination meanwhile the optimization of operating speed. A typical 35kV model with DG was established in PSCAD/ EMTDC and the simulation results proved that VCITO protection can solve the coordination and operating speed problems with DG connection and its sensitivity is high.关键词
分布式电源/保护选择性/电压修正反时限过电流保护/电压修正因子/电压梯度指数Key words
distributed generation/protection coordination/voltage correction based inverse-time overcurrent protection/voltage correction factor/voltage correction gradient exponent分类
信息技术与安全科学引用本文复制引用
喻锟,林湘宁,李浩,赵航,李正天,黄景光,薄志谦..考虑分布式电源稳定助增效应的电压修正反时限过电流保护方案[J].中国电机工程学报,2018,38(3):716-726,后插6,12.基金项目
国家自然科学基金项目(51477090,51577077) （51477090,51577077）
国网湖北省电力公司科技项目(SGTYHT/15-JS-191). Project Supported by National Natural Science Foundation of China (51477090, 51577077) （SGTYHT/15-JS-191）
Project Supported by State Grid Hubei Electric Power Company (SGTYHT/15-JS-191). （SGTYHT/15-JS-191）
