影响BZT装置正确动作的原因分析及自适应改进措施  

Analysis on Reasons affecting Correct Action of Automatic Throw-in Device of Stand-by Power and Its Adaptive Improving Measures

作　　者：王红 常喜强 

机构地区：[1]新疆电力调度控制中心,新疆乌鲁木齐830002

出　　处：《四川电力技术》2014年第2期14-17,77,共5页Sichuan Electric Power Technology

摘　　要：电网中备用电源自动投入装置(简称备自投或BZT)可以提高供电可靠性和连续性,在生产实际中得到广泛应用。但是,随着电网中新设备的接入BZT正常运行受到了影响。首先介绍了BZT装置基本工作原理及其分类;其次分析了影响BZT装置正确动作的主要因素——分布式电源(DG)的接入、与安自装置功能冲突以及备自投后主变压器过负荷等。最后,针对DG接入问题提出了主供电源跳开时联切DG的方案,针对安自装置与BZT功能冲突问题提出了电压不平衡启动判据,针对主变压器过负荷问题提出了基于功率负荷的自适应BZT方案,具有较强的实用性。Automatic throw - in devices of stand - by power can improve the reliability and continuity of power supply system, and it is widely used in the actual production. However, with grid integration of new devices, the operation of automatic throw - in device of stand - by power is affected. Firstly, the basic working principle of automatic throw - in device and its classifi- cation are introduced. Secondly, the main factors that affect the right action of automatic throw - in device are analyzed, that is, the integration of distributed generation （ DG）, the confliction with automatic safety control devices and the overload of main transformer etc. Finally, for DG integration, the scheme is proposed that DC is jointly cut when the main supply power jumps; for the confliction of automatic safety control device with automatic throw - in device, the startup criterion of voltage unbalance is proposed; for the overload of main transformer, the adaptive automatic throw - in device based on power load is proposed, which has a strong practicality.

关 键 词：备自投 分布式电源 安自装置 负荷 自适应 

分 类 号：TM762[电气工程—电力系统及自动化]