Matlab Simulink下的LLC并网与离网逆变器功能介绍：电流闭环控制并网，电压电流双闭环孤岛发电，基于Matlab2020b Simulink模块实现,Matlab Simulink下的LL
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Matlab Simulink下的LLC并网与离网逆变器功能介绍：电流闭环控制并网，电压电流双闭环孤岛发电，基于Matlab2020b Simulink模块实现,Matlab Simulink下的LLC并网与离网逆变器功能介绍：电流闭环控制并网，电压电流双闭环孤岛发电，支持SVPWM或SPWM调制，需Matlab2020b及以上版本实现。,Matlab Simulink：LLC并网 离网逆变器，可实现的功能如下1.并网模式下逆变器与主电网（相电压有效值220V，频率50Hz）连接，采用电流闭环控制模式实现并网。2.离网模式下逆变器与负载连接，采用电压电流双闭环控制模式实现孤岛发电。仿真组成：1.主电路2.坐标变，从abc坐标系转至dq坐标系3.控制模块，离网：电流闭环PI控制，并网：电压电流双闭环PI控制4.调制模块：SVPWM或SPWM版本为Matlab2020b，所有部分均由Simulink模块搭建，由于部分模块低版本没有，因此只能用20b或以上版本,LLC并网; 离网逆变器; 电流闭环控制; 电压电流双闭环控制; Simulink模块搭建; SVPWM或SPWM <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/90400103/2/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/90400103/bg1.jpg"/><div class="t m0 x1 h2 y1 ff1 fs0 fc0 sc0 ls0 ws0">Matlab Simulink<span class="_ _0"> </span><span class="ff2">是一款功能强大的工程仿真软件<span class="ff3">，</span>可以用于各种电力系统的仿真与设计<span class="ff4">。</span>本文将</span></div><div class="t m0 x1 h2 y2 ff2 fs0 fc0 sc0 ls0 ws0">围绕<span class="_ _1"> </span><span class="ff1">LLC<span class="_ _0"> </span></span>并网离网逆变器展开讨论<span class="ff3">，</span>并探讨其在并网模式和离网模式下的实现功能<span class="ff4">。</span></div><div class="t m0 x1 h2 y3 ff2 fs0 fc0 sc0 ls0 ws0">首先<span class="ff3">，</span>我们需要了解<span class="_ _1"> </span><span class="ff1">LLC<span class="_ _0"> </span></span>并网离网逆变器的基本概念和原理<span class="ff4">。<span class="ff1">LLC<span class="_ _0"> </span></span></span>并网离网逆变器是一种用于将太阳</div><div class="t m0 x1 h2 y4 ff2 fs0 fc0 sc0 ls0 ws0">能电池板<span class="ff4">、</span>风力发电机等可再生能源转化为交流电并实现与电网连接的设备<span class="ff4">。</span>它具有高效<span class="ff4">、</span>稳定的特</div><div class="t m0 x1 h2 y5 ff2 fs0 fc0 sc0 ls0 ws0">点<span class="ff3">，</span>在实际应用中得到了广泛的应用<span class="ff4">。</span></div><div class="t m0 x1 h2 y6 ff2 fs0 fc0 sc0 ls0 ws0">在并网模式下<span class="ff3">，<span class="ff1">LLC<span class="_ _0"> </span></span></span>并网离网逆变器与主电网相连接<span class="ff3">，</span>并通过电流闭环控制模式实现并网<span class="ff4">。</span>具体而言</div><div class="t m0 x1 h2 y7 ff3 fs0 fc0 sc0 ls0 ws0">，<span class="ff2">逆变器通过控制电流的大小和相位与主电网保持同步</span>，<span class="ff2">从而实现将直流电能转化为交流电能并注入</span></div><div class="t m0 x1 h2 y8 ff2 fs0 fc0 sc0 ls0 ws0">主电网中<span class="ff4">。</span>这种电流闭环控制模式可以有效地保证逆变器输出的电流与主电网的电流保持一致<span class="ff3">，</span>降低</div><div class="t m0 x1 h2 y9 ff2 fs0 fc0 sc0 ls0 ws0">并网时的电流谐波<span class="ff3">，</span>提高逆变器的并网性能<span class="ff4">。</span></div><div class="t m0 x1 h2 ya ff2 fs0 fc0 sc0 ls0 ws0">在离网模式下<span class="ff3">，<span class="ff1">LLC<span class="_ _0"> </span></span></span>并网离网逆变器与负载相连接<span class="ff3">，</span>并通过电压电流双闭环控制模式实现孤岛发电<span class="ff4">。</span></div><div class="t m0 x1 h2 yb ff2 fs0 fc0 sc0 ls0 ws0">具体而言<span class="ff3">，</span>逆变器通过控制输出电压和电流的大小和相位与负载保持稳定<span class="ff3">，</span>从而实现在无电网环境下</div><div class="t m0 x1 h2 yc ff2 fs0 fc0 sc0 ls0 ws0">为负载提供稳定的交流电能<span class="ff4">。</span>这种电压电流双闭环控制模式可以有效地保证逆变器输出的电压和电流</div><div class="t m0 x1 h2 yd ff2 fs0 fc0 sc0 ls0 ws0">的稳定性<span class="ff3">，</span>降低离网时的波动性<span class="ff3">，</span>提高逆变器的离网性能<span class="ff4">。</span></div><div class="t m0 x1 h2 ye ff2 fs0 fc0 sc0 ls0 ws0">为了实现<span class="_ _1"> </span><span class="ff1">LLC<span class="_ _0"> </span></span>并网离网逆变器的仿真<span class="ff3">，</span>我们可以将仿真模型分为以下几个部分<span class="ff3">：</span></div><div class="t m0 x1 h2 yf ff1 fs0 fc0 sc0 ls0 ws0">1.<span class="_ _2"> </span><span class="ff2">主电路<span class="ff3">：</span>主电路是<span class="_ _1"> </span></span>LLC<span class="_ _0"> </span><span class="ff2">并网离网逆变器的核心组成部分<span class="ff3">，</span>包括逆变器<span class="ff4">、</span>滤波器和输出电路等<span class="ff4">。</span></span></div><div class="t m0 x2 h2 y10 ff2 fs0 fc0 sc0 ls0 ws0">通过建立主电路的模型<span class="ff3">，</span>我们可以模拟逆变器在并网和离网模式下的工作过程<span class="ff4">。</span></div><div class="t m0 x1 h2 y11 ff1 fs0 fc0 sc0 ls0 ws0">2.<span class="_ _2"> </span><span class="ff2">坐标变换<span class="ff3">：</span>为了将主电路中的信号从<span class="_ _1"> </span></span>abc<span class="_ _0"> </span><span class="ff2">坐标系转换至<span class="_ _1"> </span></span>dq<span class="_ _0"> </span><span class="ff2">坐标系<span class="ff3">，</span>以便进行后续的控制和调制</span></div><div class="t m0 x2 h2 y12 ff2 fs0 fc0 sc0 ls0 ws0">操作<span class="ff3">，</span>我们需要添加坐标变换模块<span class="ff4">。</span>该模块可以将三相电压和电流转化为两相电压和电流<span class="ff3">，</span>方便</div><div class="t m0 x2 h2 y13 ff2 fs0 fc0 sc0 ls0 ws0">后续的控制算法实现<span class="ff4">。</span></div><div class="t m0 x1 h2 y14 ff1 fs0 fc0 sc0 ls0 ws0">3.<span class="_ _2"> </span><span class="ff2">控制模块<span class="ff3">：</span>在离网模式下<span class="ff3">，</span>逆变器需要采用电流闭环控制模式实现稳定的孤岛发电<span class="ff4">。</span>在并网模式</span></div><div class="t m0 x2 h2 y15 ff2 fs0 fc0 sc0 ls0 ws0">下<span class="ff3">，</span>逆变器需要采用电压电流双闭环控制模式实现与电网的稳定连接<span class="ff4">。</span>因此<span class="ff3">，</span>我们可以添加相应</div><div class="t m0 x2 h2 y16 ff2 fs0 fc0 sc0 ls0 ws0">的控制模块<span class="ff3">，</span>如电流闭环<span class="_ _1"> </span><span class="ff1">PI<span class="_ _0"> </span></span>控制和电压电流双闭环<span class="_ _1"> </span><span class="ff1">PI<span class="_ _0"> </span></span>控制<span class="ff3">，</span>以实现逆变器的稳定运行<span class="ff4">。</span></div><div class="t m0 x1 h2 y17 ff1 fs0 fc0 sc0 ls0 ws0">4.<span class="_ _2"> </span><span class="ff2">调制模块<span class="ff3">：</span>为了将控制信号转化为对逆变器开关管的控制信号<span class="ff3">，</span>我们可以添加调制模块<span class="ff4">。</span>常用的</span></div><div class="t m0 x2 h2 y18 ff2 fs0 fc0 sc0 ls0 ws0">调制技术有<span class="_ _1"> </span><span class="ff1">SVPWM<span class="ff3">（</span>Space Vector Pulse Width Modulation<span class="ff3">）</span></span>和<span class="_ _1"> </span><span class="ff1">SPWM<span class="ff3">（</span>Sinusoidal </span></div><div class="t m0 x2 h2 y19 ff1 fs0 fc0 sc0 ls0 ws0">Pulse Width Modulation<span class="ff3">），<span class="ff2">可以根据实际需求选择合适的调制技术<span class="ff4">。</span></span></span></div><div class="t m0 x1 h2 y1a ff2 fs0 fc0 sc0 ls0 ws0">需要注意的是<span class="ff3">，</span>所需的<span class="_ _1"> </span><span class="ff1">Matlab Simulink<span class="_ _0"> </span></span>版本为<span class="_ _1"> </span><span class="ff1">2020b<span class="_ _0"> </span></span>或以上<span class="ff3">，</span>因为部分模块在低版本中可能无</div><div class="t m0 x1 h2 y1b ff2 fs0 fc0 sc0 ls0 ws0">法使用<span class="ff4">。</span>通过使用<span class="_ _1"> </span><span class="ff1">Simulink<span class="_ _0"> </span></span>模块搭建以上部分<span class="ff3">，</span>我们可以实现<span class="_ _1"> </span><span class="ff1">LLC<span class="_ _0"> </span></span>并网离网逆变器的仿真<span class="ff4">。</span></div></div><div class="pi" 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