企业电网低频减载与马达低压保护优化协调  

Coordination Strategy of Low Frequency Load Shedding and Under-voltage Tripping of Motors in Large Industrial Power Grid

作　　者：杨琦[1] 韩天真 郭庆奎 原永禹 孙建军[3] 

机构地区：[1]中国电力科学研究院,北京100192 [2]华北电力大学电气与电子工程学院,保定071003 [3]中国石油化工股份有限公司天津分公司,天津300271

出　　处：《电力系统及其自动化学报》2015年第12期70-76,共7页Proceedings of the CSU-EPSA

摘　　要：基于轨迹的时域动态仿真分析方法,分析得出大型工业电网在孤岛运行时低频减载措施与马达低压保护配置间普遍存在的问题,提出了低频减载措施与电动机低压保护协调配合策略。文中以某大型炼化企业电网为例,模拟了严重故障下企业电网孤岛运行全过程,校核了现有企业电网低频减载措施与电动机低压保护定值间的配合情况,采取搜索+校验的方法,结合电压、频率变化轨迹,给出企业电网低频减载与低压保护定值的协调配合方案,确保了企业电网安全稳定运行。Trajectory-based time-domain dynamic simulation method is used to analyze problems of the configuration of low frequency load shedding and under-voltage tripping of the large industrial enterprise grids when island operation. In this paper,take a large petrochemical enterprise grid for example,simulations of island operation caused by the serious fault are made and the existing configurationof low frequency load shedding and the low voltage protection of motors are checked. Taking search and check method and combining the voltage and frequency curves,the coordination scheme is proposed to ensure the operation of the enterprise grid safe and stable.

关 键 词：低频减载 低压脱扣 协调配置 孤岛运行 频率 

分 类 号：TM727[电气工程—电力系统及自动化]