基于PSCAD的辅机低电压穿越附加装置仿真分析Simulation and Analysis of Auxiliaries LVRT Attachment Based on PSCAD
汪冬辉,吕文韬,罗华峰,柯人观
WANG Donghui,LYU Wentao,LUO Huafeng,KE Renguan
摘要(Abstract)：
由于发电厂厂用电系统或者外部电网的暂态过程,导致输入辅机变频器的电压降低,可能出现辅机工况紊乱,甚至变频器切除,低电压穿越已经成为辅机正常运行必须考虑的问题。安装附加装置可以在尽可能少地改变原电路基础上应对低电压问题,其中增加升压模块、直流侧安装储能装置、交流侧安装在线式UPS是比较典型的方案。通过在PSCAD/EMTDC软件中建模仿真证明,直流侧储能装置以及交流侧UPS系统的安装,在低电压穿越时对辅机变频器基本无影响,但这2种方案费用较高;而增加升压模块可能导致变频器直流侧过电压,需要采取抑制措施,但其费用较低,可根据现场条件以及技术经济性综合考虑采用何种方案。
Frequency converter voltage of auxiliaries may drop due to transient state process of power plant auxiliary power system or external power networks, which results in operation condition turbulence of auxiliaries or even frequency converter removal. Therefore, low voltage ride through(LVRT) must be taken into consideration for the normal operation of auxiliaries. By installing attachment the original circuit can be less changed. A typical scheme is to increase voltage boosting modules, install energy storage device at DC side and online UPS at AC side. It is proved by modeling and simulation in PSCAD/EMTDC software that the energy storage device at DC side and UPS at AC side have little impact on frequency converter of auxiliaries during low voltage ride through, but the two schemes are costly; however, increase of voltage boosting modules may result in overvoltage at DC side of frequency converter and some suppression measures must be taken, but this scheme is less costly. The schemes can be chosen in comprehensive consideration of field conditions as well as technical and economical efficiencies.
关键词(KeyWords)：
辅机;变频器;低电压穿越;升压模块;储能装置
auxiliary;frequency converter;low voltage ride through;voltage boosting module;energy storage equipment
基金项目(Foundation):
作者(Author):
汪冬辉,吕文韬,罗华峰,柯人观
WANG Donghui,LYU Wentao,LUO Huafeng,KE Renguan
DOI: 10.19585/j.zjdl.2015.11.020
参考文献(References)：
- [1]陈建行,刘茂山.高压变频器在寿光金太阳热电厂辅机节能改造中的应用[J].变频器世界,2010(12):75-82.
- [2]赵兴武.变频器在黔东电厂工业水系统上的应用[J].黑龙江科技信息,2010(03):15-16.
- [3]李树明,李长庆,宋光增,等.国产高压变频器在电厂辅机节能改造中的应用[J].变频器世界,2010(01):68-72.
- [4]杨宝峰,陶军,董永乐,等.火电机组辅机变频器低电压过渡能力测试研究[J].内蒙古电力技术,2014,32(04):10-15.
- [5]钱可弭,沙励,林松秋,等.变频器在火力发电厂的应用[J].电力自动化设备,2001,21(07):60-61.
- [6]韩其国,陈林.防止变频器电压跌落停机的电源方案[J].电源技术,2012,36(11):1735-1738.
- [7]彭博.发电厂凝泵高压变频调速系统的研究[D].淮南:安徽理工大学,2014.
- [8]傅钧,许卫东,盖东飞.发电厂辅机各种常用调速系统的应用研究[J].电源技术,2012,36(11):1735-1738.
- [9]谢雅,黄中华,左金玉.三相交流异步电机矢量控制系统仿真建模[J].湖南工程学院学报,2013,23(01):1-4.
- [10]张成,王心坚,衣鹏,等.SVPWM与SPWM比较仿真研究[J].机械与电子,2013(01):3-6.
- [11]周源,王黎,邱忠才,等.异步电机矢量控制系统的仿真建模与实现[J].信息技术,2012(06):195-200.
- [12]王晓宇,张涛,刘树,等.火电厂辅机变频器低电压穿越电源[J].电力自动化设备,2015,35(05):152-157.
- [13]张东明,姚秀萍,王维庆,等.含低电压穿越电源的火电厂辅机变频器的研究[J].华东电力,2013,41(06):1345-1347.
- [14]白丹.三相在线式UPS及其并联技术研究[D].武汉:华中科技大学,2004.