基于Crowbar电路和Chopper电路的低电压穿越控制算法在DFIG风力发电系统中的仿真研究,基于Crowbar电路和Chopper电路的双馈异步风力发电系统LVRT控制算法仿真研究,DFIG双馈
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基于Crowbar电路和Chopper电路的低电压穿越控制算法在DFIG风力发电系统中的仿真研究,基于Crowbar电路和Chopper电路的双馈异步风力发电系统LVRT控制算法仿真研究,DFIG双馈异步式风力发电系统的低电压穿越（LVRT）控制算法的仿真模型，基于Crowbar电路（转子串电阻）和Chopper电路：1. 正常并网发电时的网侧变流器与机侧变流器的控制算法仿真，网侧为四象限整流，电压外环电流内环双闭环，基于SOGI二阶广义积分器进行锁相，可实现电网电压严重畸变、不平衡、网压波动工况下的精准锁相。加入了300Hz谐振控制器来抑制网侧电流的5 7次谐波；2. 机侧变流器采用有功无功解耦控制，可控制并网功率因数，定子磁链定向控制；3.低电压穿越控制电路：网侧变流器为Chopper电路，机侧变流器为Crowbar电路；4. 低电压穿越控制算法分为“电网三相电压发生对称跌跌落”和“电网电压发生不对称跌落”两种工况，对称跌落工况除了进行转子能量泄放还进行了无功支撑，在电网电压跌落阶段控制向电网发无功来支撑电网电压恢复。,DFIG; LVRT控制算法; 仿真模型; Cro <link href="/image.php?url=https://csdnimg.cn/release/download_crawler_static/css/base.min.css" rel="stylesheet"/><link href="/image.php?url=https://csdnimg.cn/release/download_crawler_static/css/fancy.min.css" rel="stylesheet"/><link href="/image.php?url=https://csdnimg.cn/release/download_crawler_static/90428714/2/raw.css" rel="stylesheet"/><div id="sidebar" style="display: none"><div id="outline"></div></div><div class="pf w0 h0" data-page-no="1" id="pf1"><div class="pc pc1 w0 h0"><img alt="" class="bi x0 y0 w1 h1" src="/image.php?url=https://csdnimg.cn/release/download_crawler_static/90428714/bg1.jpg"/><div class="t m0 x1 h2 y1 ff1 fs0 fc0 sc0 ls0 ws0">**DFIG<span class="_ _0"> </span><span class="ff2">风力发电系统低电压穿越控制算法仿真模型探索</span>**</div><div class="t m0 x1 h2 y2 ff2 fs0 fc0 sc0 ls0 ws0">在风<span class="_ _1"></span>力发<span class="_ _1"></span>电的<span class="_ _1"></span>领域<span class="_ _1"></span>里，<span class="_ _1"></span><span class="ff1">DFIG</span>（<span class="_ _1"></span>双馈<span class="_ _1"></span>异步<span class="_ _1"></span>式风力<span class="_ _1"></span>发电<span class="_ _1"></span>系统<span class="_ _1"></span>）因<span class="_ _1"></span>其高<span class="_ _1"></span>效率<span class="_ _1"></span>与良<span class="_ _1"></span>好的<span class="_ _1"></span>可调<span class="_ _1"></span>性被<span class="_ _1"></span>广</div><div class="t m0 x1 h2 y3 ff2 fs0 fc0 sc0 ls0 ws0">泛应用<span class="_ _1"></span>。而<span class="_ _1"></span>其面临<span class="_ _1"></span>的一<span class="_ _1"></span>个主要<span class="_ _1"></span>挑战<span class="_ _1"></span>便是<span class="_ _1"></span>电网低<span class="_ _1"></span>电压<span class="_ _1"></span>穿越（<span class="_ _1"></span><span class="ff1">LVRT</span>）<span class="_ _1"></span>问题。<span class="_ _1"></span>本文<span class="_ _1"></span>将从<span class="_ _1"></span>一种独<span class="_ _1"></span>特</div><div class="t m0 x1 h2 y4 ff2 fs0 fc0 sc0 ls0 ws0">角度，<span class="_ _2"></span>探讨<span class="_ _0"> </span><span class="ff1">DFIG<span class="_ _0"> </span></span>在低电压穿越控制算法中的仿真模型，<span class="_ _2"></span>特别关注于基于<span class="_ _0"> </span><span class="ff1">Crowbar<span class="_"> </span></span>电路<span class="_ _2"></span>（转</div><div class="t m0 x1 h2 y5 ff2 fs0 fc0 sc0 ls0 ws0">子串电阻）和<span class="_ _0"> </span><span class="ff1">Chopper<span class="_"> </span></span>电路的解决方案。</div><div class="t m0 x1 h2 y6 ff1 fs0 fc0 sc0 ls0 ws0">**<span class="ff2">一、正常并网发电时的仿真</span>**</div><div class="t m0 x1 h2 y7 ff2 fs0 fc0 sc0 ls0 ws0">在正常并网发电时，<span class="_ _3"></span>网侧变流器与机侧变流器协同工作，<span class="_ _3"></span>确保电力平稳输出。<span class="_ _3"></span>网侧变流器采</div><div class="t m0 x1 h2 y8 ff2 fs0 fc0 sc0 ls0 ws0">用四象限整流技术，<span class="_ _4"></span>其电压外环与电流内环的双闭环控制策略，<span class="_ _4"></span>使得系统在电网电压严重畸</div><div class="t m0 x1 h2 y9 ff2 fs0 fc0 sc0 ls0 ws0">变、不平衡或网压波动的情况下仍能稳定运行。</div><div class="t m0 x1 h2 ya ff1 fs0 fc0 sc0 ls0 ws0">SOGI<span class="ff2">（二<span class="_ _1"></span>阶广义<span class="_ _1"></span>积分<span class="_ _1"></span>器）在<span class="_ _1"></span>此处<span class="_ _1"></span>发挥了<span class="_ _1"></span>重要作<span class="_ _1"></span>用，<span class="_ _1"></span>它能够<span class="_ _1"></span>实现<span class="_ _1"></span>精准的<span class="_ _1"></span>锁相<span class="_ _1"></span>功能，<span class="_ _1"></span>即使在<span class="_ _1"></span>电</span></div><div class="t m0 x1 h2 yb ff2 fs0 fc0 sc0 ls0 ws0">网电压出<span class="_ _1"></span>现上述不<span class="_ _1"></span>良工况时<span class="_ _1"></span>。此外，<span class="_ _1"></span>为了抑制<span class="_ _1"></span>网侧电<span class="_ _1"></span>流的<span class="_ _0"> </span><span class="ff1">5<span class="_"> </span></span>次和<span class="_ _0"> </span><span class="ff1">7<span class="_"> </span></span>次谐波，我<span class="_ _1"></span>们还加入<span class="_ _1"></span>了</div><div class="t m0 x1 h2 yc ff1 fs0 fc0 sc0 ls0 ws0">300Hz<span class="_ _0"> </span><span class="ff2">的谐振控制器。</span></div><div class="t m0 x1 h2 yd ff2 fs0 fc0 sc0 ls0 ws0">机侧变流器则采用有功无功解耦控制，<span class="_ _4"></span>这种控制方式不仅可以控制并网功率因数，<span class="_ _4"></span>还通过定</div><div class="t m0 x1 h2 ye ff2 fs0 fc0 sc0 ls0 ws0">子磁链定向控制，确保了电机的高效运行和功率因数的精确调节。</div><div class="t m0 x1 h2 yf ff1 fs0 fc0 sc0 ls0 ws0">**<span class="ff2">二、低电压穿越控制电路的引入</span>**</div><div class="t m0 x1 h2 y10 ff2 fs0 fc0 sc0 ls0 ws0">面对电网低电压的情况，<span class="ff1">DFIG<span class="_ _0"> </span></span>需要采取特殊措施来应对。其中，网侧变流器采用<span class="_ _0"> </span><span class="ff1">Chopper</span></div><div class="t m0 x1 h2 y11 ff2 fs0 fc0 sc0 ls0 ws0">电路，<span class="_ _1"></span>机侧<span class="_ _1"></span>变流<span class="_ _1"></span>器则<span class="_ _1"></span>采用<span class="_ _5"> </span><span class="ff1">Crowbar<span class="_"> </span></span>电路。这<span class="_ _1"></span>两种<span class="_ _1"></span>电路<span class="_ _1"></span>的设<span class="_ _1"></span>计均<span class="_ _1"></span>是为<span class="_ _1"></span>了在电<span class="_ _1"></span>网电<span class="_ _1"></span>压下<span class="_ _1"></span>降时<span class="_ _1"></span>，</div><div class="t m0 x1 h2 y12 ff2 fs0 fc0 sc0 ls0 ws0">为系统提供额外的电流通路或电阻消耗，从而保护设备免受损害。</div><div class="t m0 x1 h2 y13 ff1 fs0 fc0 sc0 ls0 ws0">**<span class="ff2">三、低电压穿越控制算法的仿真</span>**</div><div class="t m0 x1 h2 y14 ff2 fs0 fc0 sc0 ls0 ws0">低电压穿越控制算法的仿真分为两种工况<span class="_ _4"></span>：<span class="_ _4"></span>电网三相电压发生对称跌落和电网电压发生不对</div><div class="t m0 x1 h2 y15 ff2 fs0 fc0 sc0 ls0 ws0">称跌落。</div><div class="t m0 x1 h2 y16 ff2 fs0 fc0 sc0 ls0 ws0">在对称跌落<span class="_ _1"></span>工况下，系<span class="_ _1"></span>统通过快速<span class="_ _1"></span>检测电压变<span class="_ _1"></span>化，启动<span class="_ _0"> </span><span class="ff1">Crowbar<span class="_"> </span></span>电路和<span class="_ _0"> </span><span class="ff1">Chopper<span class="_"> </span></span>电路，迅</div><div class="t m0 x1 h2 y17 ff2 fs0 fc0 sc0 ls0 ws0">速将转子中的多余能量通过电阻消耗掉，<span class="_ _3"></span>同时保持系统的稳定性。<span class="_ _3"></span>这一过程中，<span class="_ _3"></span>网侧与机侧</div><div class="t m0 x1 h2 y18 ff2 fs0 fc0 sc0 ls0 ws0">的变流器需协同工作，确保电流的平滑过渡和系统的稳定运行。</div><div class="t m0 x1 h2 y19 ff2 fs0 fc0 sc0 ls0 ws0">而<span class="_ _6"></span>在<span class="_ _6"></span>不<span class="_ _6"></span>对<span class="_ _6"></span>称<span class="_ _6"></span>跌<span class="_ _6"></span>落<span class="_ _6"></span>工<span class="_ _6"></span>况<span class="_ _6"></span>下<span class="_ _6"></span>，<span class="_ _6"></span>由<span class="_ _6"></span>于<span class="_ _6"></span>电<span class="_ _6"></span>网<span class="_ _6"></span>电<span class="_ _6"></span>压<span class="_ _6"></span>的<span class="_ _6"></span>不<span class="_ _6"></span>平<span class="_ _6"></span>衡<span class="_ _6"></span>，<span class="_ _6"></span>系<span class="_ _6"></span>统<span class="_ _6"></span>需<span class="_ _6"></span>更<span class="_ _6"></span>加<span class="_ _6"></span>精<span class="_ _6"></span>确<span class="_ _6"></span>地<span class="_ _6"></span>控<span class="_ _6"></span>制<span class="_ _7"> </span><span class="ff1">Crowbar<span class="_ _7"> </span></span>和</div><div class="t m0 x1 h2 y1a ff1 fs0 fc0 sc0 ls0 ws0">Chopper<span class="_"> </span><span class="ff2">的投入与切除时机。此时，</span>SOGI<span class="_"> </span><span class="ff2">锁相环的精准性显<span class="_ _1"></span>得尤为重要，它<span class="_ _1"></span>能够确保系统</span></div><div class="t m0 x1 h2 y1b ff2 fs0 fc0 sc0 ls0 ws0">在不对称电压条件下仍能准确检测电网相位，实现精确的控制。</div><div class="t m0 x1 h2 y1c ff1 fs0 fc0 sc0 ls0 ws0">**<span class="ff2">四、代码示例</span>**</div><div class="t m0 x1 h2 y1d ff2 fs0 fc0 sc0 ls0 ws0">以下是网侧变流器控制算法的简化代码片段（伪代码）<span class="_ _8"></span>：</div><div class="t m0 x1 h2 y1e ff1 fs0 fc0 sc0 ls0 ws0">```plaintext</div></div><div class="pi" data-data='{"ctm":[1.611830,0.000000,0.000000,1.611830,0.000000,0.000000]}'></div></div>