| 对比研究链式STATCOM与SVC对电网的暂态支撑能力 |
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| 引用本文： | 陈霞,许伯强. 对比研究链式STATCOM与SVC对电网的暂态支撑能力[J]. 电力科学与工程, 2012, 28(8): 30-35 |
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| 作者姓名： | 陈霞 许伯强 |
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| 作者单位： | 华北电力大学电气与电子工程学院,河北保定,071003 |
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| 基金项目： | 国家自然科学基金资助项目 |
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| 摘 要： | 大型互联电网若缺乏充足的动态无功支撑将面临严重暂态电压失稳现象,在输电系统的关键位置安装快速可控的无功补偿装置将有效抑制这一现象.重点研究了电网故障下动态无功补偿装置SVC和链式STATCOM的暂态电压支撑能力以及暂稳极限提高能力.针对链式STATCOM的独特结构,提出了一种改进分相控制策略.基于Matlab/Simulink搭建了系统仿真模型,仿真结果证实故障下链式STATCOM的暂态电压支撑能力略高于SVC,暂稳极限提升能力明显优于SVC,同时验证了改进分相控制策略可确保不对称故障期间链式STATCOM对系统的暂态支撑作用正常发挥.
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| 关 键 词： | SVC 链式STATCOM 电网故障 暂态稳定性 分相控制 |
Comparing Transient Support Capability of Cascade STATCOM and SVC during Grid Faults |
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| Chen Xia , Xu Boqiang. Comparing Transient Support Capability of Cascade STATCOM and SVC during Grid Faults[J]. Power Science and Engineering, 2012, 28(8): 30-35 |
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| Authors: | Chen Xia Xu Boqiang |
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| Affiliation: | (School of Electrical and Electronic Engineering,North China Electric Power University,Baoding 071003,China) |
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| Abstract: | Large scale interconnected power system will front the transient voltage stability problem once lacking adequate dynamic VAR compensation.In this paper,a comparison is made for the transient voltage support capability and transient limits improve capability of SVC and cascade STATCOM,and the main factors influencing the capability also in-depth discussed.A newly improved control strategy is presented,which ensures the transient voltage support capability of cascade STATCOM even under asymmetric grid faults.Based on Matlab/Simulink build a system simulation model,simulation results verify that the transient support ability of cascade STATCOM is slightly better than that of SVC,but much better in the transient limits improve aspects,and meanwhile validate the validity of the improved control strategy. |
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| Keywords: | SVC cascade STATCOM grid faults transient stability single-phase control |
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