论文标题
在逆变器交换微电网上进行负载总线保护的动态状态估计
Dynamic State Estimation for Load Bus Protection on Inverter-Interfaced Microgrids
论文作者
论文摘要
设计保护系统时，逆变器交织的微电网会导致挑战。由于缺乏故障电流，短路或需要安装的防护装置数量过时，传统的时流，接收和差异保护方法是不合适的。当前的做法是迫使所有逆变器在断层条件下关闭，降低弹性并降低可靠性。以前已经为线路保护和负载总线保护探索的动态状态估计（DSE）是解决这些挑战的潜在解决方案，以创建广泛利用，高度可靠的保护系统。但是，它仅通过理想的电压源对负载保护进行了测试，这些电压源不会捕获逆变器交换生成的短路行为，尤其是故障电流和不平衡的输出电压。本文旨在扩展有关DSE负载保护的最先进：在短路条件下，DSE的性能具有与网格形成的逆变器，并研究了在断层条件下具有电流限制行为的逆变器。
Inverter-interfaced microgrids results in challenges when designing protection systems. Traditional time-overcurrent, admittance, and differential protection methods are unsuitable on account of lack of fault current, excessively short lines, or a prohibitive number of protective devices needing to be installed. Current practice is to force all inverters to shut down during fault conditions, weakening resilience and reducing reliability. Dynamic state estimation (DSE), which has been explored for both line protection and load bus protection before, is a potential solution to these challenges to create widely utilizable, highly reliable protection systems. However, it has only been tested for load protection with ideal voltage sources, which do not capture the short-circuit behavior of inverter-interfaced generation, notably low fault current and unbalanced output voltage. This paper aims to extend the state-of-the-art on DSE load protection: the performance of DSE during short-circuit conditions with a grid-forming inverter with current-limiting behavior during fault conditions is investigated.
