550 kV快速断路器液-机-气整机联合仿真
Co-simulation of Liquid-machine-gas Machine of 550 kV Fast Circuit Breaker
邹焕成 1林莘 1钟建英 2魏建巍 2徐华 3陈孝信3
作者信息
- 1. 沈阳工业大学电气工程学院,沈阳 110870
- 2. 平高集团有限公司,平顶山 467001
- 3. 国家电网浙江省电力有限公司,杭州 310007
- 折叠
摘要
快速断路器可实现短路故障的快速切除,对保证电力系统安全稳定运行具有重要意义.针对一种快速响应、高速运动的新型液压操动机构,建立液压操动机构、传动系统和灭弧室之间的耦合关系,开展液-机-气联合仿真研究,分析不同操作功对动触头运动特性、液压缸缓冲特性和灭弧室反力特性的影响规律,在此基础上,对传动系统应力分布进行计算,对存在破坏风险的零部件提出改进策略,确定试验样机设计方案.研究结果表明:操作功对分闸速度影响明显,确定机构活塞杆侧作用面积为3160 mm2,分闸速度提升至13.63 m/s,触头机械分离时间缩短至4.45 ms,满足快速开断需求.随着机构操作功的提升,机构缓冲力峰值和灭弧室压气反力峰值提升明显,造成部分传动件应力值超标,通过优化液压操动机构缓冲性能以及传动件结构,设计出满足机械强度要求的传动系统.研究成果指导研发了操动机构试验样机,试验结果满足快速开断要求.
Abstract
The fast circuit breaker plays a crucial role in ensuring the safe and stable operation of the power system by swiftly removing short circuit faults.Aiming at a new type of hydraulic operating mechanism with fast response and high speed movement,we established a coupling relationship between the hydraulic operating mechanism,transmission system,and arc extinguishing chamber,and conducted a liquid-mechanical-gas co-simulation study.Moreover,we analyzed the influences of different operating powers on the motion characteristics of moving contacts,the buffering characteristics of hydraulic cylinders,and the reaction characteristics of arc extinguishing chambers.Based on this basis,the stress distribu-tion of the transmission system was calculated,and an improvement strategy was proposed for parts with damage risk.The design scheme of the test prototype was determined.The research results show that the operating power significantly impacts the opening speed.The mechanism's piston rod side acting area is determined to be 3160 mm2,increasing the opening speed to 13.63 m/s and shortening the mechanical separation time of the contact to 4.45 ms,meeting fast break-ing requirements.However,with an improvement in the operating work of the mechanism,the peak of the mechanism buffer force and the peak of the pressure reaction force of the arc extinguishing chamber increase obviously,causing some transmission parts'stress values to exceed the standard.By optimizing the buffering performance of the hydraulic operat-ing mechanism and the structure of the transmission parts,the transmission system which can meet the requirements of mechanical strength is designed.The research guides the development of the operating mechanism test prototype,whose test results meet the fast breaking requirements.
关键词
快速断路器/液压操动机构/传动系统/灭弧室/操作功/分闸速度/机械强度Key words
fast circuit breaker/hydraulic operating mechanism/transmission system/arc extinguishing chamber/oper-ating power/opening speed/mechanical strength引用本文复制引用
基金项目
国家电网科技项目(SGZJDK00ZTJS2000467)
出版年
2024
国家科技期刊平台
NSTL
万方数据