[原创]电网对称故障下双馈感应发电机低电压穿越分析

<p class="1" style="MARGIN: 5pt 0cm;"><font face="黑体" size="6"><strong>电网对称故障下双馈感应发电机低电压穿越分析</strong></font></p><p class="2" style="MARGIN: 0cm 0cm 5pt;"><span lang="EN-US" style="COLOR: black;"><a href="http://film.eptchina.cn/"><font size="5"><font face="仿宋_GB2312"><strong><span lang="EN-US"><span lang="EN-US">宋新甫<span style="mso-spacerun: yes;">&nbsp; </span></span></span><span lang="EN-US"><span lang="EN-US">刘军<span style="mso-spacerun: yes;">&nbsp; </span></span></span><span lang="EN-US"><span lang="EN-US">黄戈<span style="mso-spacerun: yes;">&nbsp; </span></span></span><span lang="EN-US"><span lang="EN-US">敬强</span></span></strong></font></font></a>^<p></p></span></p><p class="3" style="MARGIN: 0cm 0cm 7pt;"><font face="楷体_GB2312"><strong>（<span lang="EN-US">1. </span>西安理工大学 水利水电学院<span lang="EN-US">, </span>西安<span lang="EN-US"> 710048)</span></strong></font></p><p class="4" style="MARGIN: 0cm 0cm 0pt;"><strong><span class="Char"><span style="COLOR: black; mso-ascii-font-family: 宋体;"><font face="黑体">摘要</font></span></span><font face="宋体"><span class="Char0"><span lang="EN-US" style="COLOR: black;">: </span></span>随着风电装机容量的急剧扩大，风电场对地区电网稳定性造成的影响愈发显著。电网短时故障情况下风力发电机的低电压穿越<span lang="EN-US">(LVRT)</span>技术越来越受关注，新的电网规程要求风力发电机具有低电压穿越功能。首先介绍<span lang="EN-US">LVRT</span>应用策略及要求，并对电网对称故障下<span lang="EN-US">DFIG</span>的电磁关系（发电机端电压、定子磁链、转子磁链）进行分析，找出影响故障时<span lang="EN-US">DFIG</span>稳定性的因素，然后在仿真软件<span lang="EN-US">SCAD</span>环境下，在电网电压跌落时采用一种基于<span lang="EN-US">crowbar</span>装置的保护方法进行<span lang="EN-US">LVRT</span>仿真实验，分析<span lang="EN-US">DFIG</span>的运行特性分析，并提出一些可供参考的观点。<span class="Char"><span lang="EN-US" style="FONT-WEIGHT: normal; COLOR: black; FONT-FAMILY: 宋体; mso-fareast-font-family: 黑体; mso-bidi-font-weight: bold;"><p></p></span></span></font></strong></p><p class="5" style="MARGIN: 6pt 0cm 10pt;"><strong><font face="黑体"><span class="Char"><span style="FONT-SIZE: 10.5pt;">关键词</span></span><span lang="EN-US" style="FONT-FAMILY: 黑体;"><font size="2">:</font></span></font><font face="宋体"><span lang="EN-US"><font size="2">
                                        </font></span><span class="Char1"><span style="FONT-SIZE: 10.5pt;">双馈感应发电机<span lang="EN-US">; </span>风力发电<span lang="EN-US">; </span>对称故障<span lang="EN-US">; </span></span></span><font size="2">低电压穿越</font><span class="Char1"><span lang="EN-US" style="FONT-SIZE: 10.5pt;">; Crowbar</span></span><span class="Char1"><span style="FONT-SIZE: 10.5pt;">电路<span lang="EN-US"><p></p></span></span></span></font></strong></p>

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