有文档I型NPC三电平逆变器SVPWM仿真设计描述：①为了实现直流均压控制，加入中点电位平衡控制，直流侧支撑电容两端电压偏移在0.3V之内 ②输出滤波采用LCL型滤波，效果优越于LC型③采
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【有文档】I型NPC三电平逆变器SVPWM仿真设计描述：①为了实现直流均压控制，加入中点电位平衡控制，直流侧支撑电容两端电压偏移在0.3V之内。②输出滤波采用LCL型滤波，效果优越于LC型③采用SVPWM调制策略，直流电压1200V，交流侧输出线电压有效值800V，波形标准，谐波含量低。输出三相电流THD分析谐波畸变率就0.19%④除此之外逆变器应用了双闭环解耦控制，电压环实现稳定跟踪，电流环加快响应速度。资料内容：三相逆变参数计算、理论分析、SVPWM、中点电位平衡控制等等都有说明文档如下图所示 <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/90213009/2/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/90213009/bg1.jpg"/><div class="t m0 x1 h2 y1 ff1 fs0 fc0 sc0 ls0 ws0">**<span class="ff2">关于<span class="_ _0"> </span></span>I<span class="_ _1"> </span><span class="ff2">型<span class="_ _0"> </span></span>NPC<span class="_ _1"> </span><span class="ff2">三电平逆变器<span class="_ _0"> </span></span>SVPWM<span class="_ _1"> </span><span class="ff2">仿真设计的技术分析</span>**</div><div class="t m0 x1 h2 y2 ff2 fs0 fc0 sc0 ls0 ws0">一<span class="ff3">、</span>背景与引言</div><div class="t m0 x1 h2 y3 ff2 fs0 fc0 sc0 ls0 ws0">近年来<span class="ff4">，</span>随着电力电子技术的快速发展<span class="ff4">，<span class="ff1">NPC</span>（<span class="ff1">Neutral Point Clamped</span>）</span>三电平逆变器在能源领</div><div class="t m0 x1 h2 y4 ff2 fs0 fc0 sc0 ls0 ws0">域中的应用日益广泛<span class="ff3">。</span>为了提高直流均压控制效果<span class="ff4">，</span>减少直流侧支撑电容两端电压偏移<span class="ff4">，</span>许多厂商开</div><div class="t m0 x1 h2 y5 ff2 fs0 fc0 sc0 ls0 ws0">始对三电平逆变器的<span class="_ _0"> </span><span class="ff1">SVPWM<span class="_ _1"> </span></span>仿真设计给予高度重视<span class="ff3">。</span>本次技术博客文章将围绕逆变器的直流均压控制</div><div class="t m0 x1 h2 y6 ff2 fs0 fc0 sc0 ls0 ws0">策略及仿真设计展开讨论<span class="ff4">，</span>以期为工程师们提供深入的技术分析依据<span class="ff3">。</span></div><div class="t m0 x1 h2 y7 ff2 fs0 fc0 sc0 ls0 ws0">二<span class="ff3">、<span class="ff1">NPC<span class="_ _1"> </span></span></span>三电平逆变器设计要点</div><div class="t m0 x1 h2 y8 ff1 fs0 fc0 sc0 ls0 ws0">1.<span class="_ _2"> </span><span class="ff2">直流均压控制策略</span></div><div class="t m0 x1 h2 y9 ff2 fs0 fc0 sc0 ls0 ws0">为了实现直流均压控制<span class="ff4">，</span>逆变器在设计中加入了中点电位平衡控制<span class="ff3">。</span>这一控制策略通过优化中点电压</div><div class="t m0 x1 h2 ya ff2 fs0 fc0 sc0 ls0 ws0">的平衡<span class="ff4">，</span>确保直流侧支撑电容两端电压的稳定<span class="ff4">，</span>从而有效降低直流侧电压波动<span class="ff4">，</span>提高系统的稳定性<span class="ff3">。</span></div><div class="t m0 x1 h2 yb ff1 fs0 fc0 sc0 ls0 ws0">2.<span class="_ _2"> </span><span class="ff2">输出滤波设计</span></div><div class="t m0 x1 h2 yc ff2 fs0 fc0 sc0 ls0 ws0">采用<span class="_ _0"> </span><span class="ff1">LCL<span class="_ _1"> </span></span>型滤波器替代传统的<span class="_ _0"> </span><span class="ff1">LC<span class="_ _1"> </span></span>滤波器<span class="ff4">，</span>其优越的性能和较低的谐波含量使得逆变器的输出滤波效</div><div class="t m0 x1 h2 yd ff2 fs0 fc0 sc0 ls0 ws0">果更加出色<span class="ff3">。</span>同时<span class="ff4">，</span>该设计也满足了现代电力电子设备对低噪声<span class="ff3">、</span>低纹波的要求<span class="ff3">。</span></div><div class="t m0 x1 h2 ye ff1 fs0 fc0 sc0 ls0 ws0">3.<span class="_ _2"> </span>SVPWM<span class="_ _1"> </span><span class="ff2">调制策略</span></div><div class="t m0 x1 h2 yf ff2 fs0 fc0 sc0 ls0 ws0">采用<span class="_ _0"> </span><span class="ff1">SVPWM<span class="_ _1"> </span></span>调制策略是逆变器的重要特点之一<span class="ff3">。</span>在直流电压为<span class="_ _0"> </span><span class="ff1">1200V<span class="_ _1"> </span></span>的情况下<span class="ff4">，<span class="ff1">SVPWM<span class="_ _1"> </span></span></span>能够有效地</div><div class="t m0 x1 h2 y10 ff2 fs0 fc0 sc0 ls0 ws0">控制逆变器的输出电流波形<span class="ff4">，</span>确保输出线电压的有效值达到<span class="_ _0"> </span><span class="ff1">800V<span class="ff4">，</span></span>从而实现标准化的波形和低谐波</div><div class="t m0 x1 h2 y11 ff2 fs0 fc0 sc0 ls0 ws0">含量的输出<span class="ff3">。</span></div><div class="t m0 x1 h2 y12 ff2 fs0 fc0 sc0 ls0 ws0">三<span class="ff3">、</span>仿真设计详述</div><div class="t m0 x1 h2 y13 ff1 fs0 fc0 sc0 ls0 ws0">1.<span class="_ _2"> </span><span class="ff2">三相逆变参数计算</span></div><div class="t m0 x1 h2 y14 ff2 fs0 fc0 sc0 ls0 ws0">在进行逆变器的仿真设计之前<span class="ff4">，</span>首先需要准确计算三相逆变器的参数<span class="ff4">，</span>包括逆变器的主电路参数<span class="ff3">、</span>开</div><div class="t m0 x1 h2 y15 ff2 fs0 fc0 sc0 ls0 ws0">关器件参数等<span class="ff3">。</span>这些参数的计算需要根据逆变器的具体应用场景和要求进行<span class="ff4">，</span>确保仿真设计的准确性</div><div class="t m0 x1 h3 y16 ff3 fs0 fc0 sc0 ls0 ws0">。</div><div class="t m0 x1 h2 y17 ff1 fs0 fc0 sc0 ls0 ws0">2.<span class="_ _2"> </span>SVPWM<span class="_ _1"> </span><span class="ff2">调制策略实现</span></div><div class="t m0 x1 h2 y18 ff1 fs0 fc0 sc0 ls0 ws0">SVPWM<span class="_ _1"> </span><span class="ff2">调制策略的实现是通过编写相应的仿真程序来实现的<span class="ff3">。</span>在仿真程序中<span class="ff4">，</span>需要模拟逆变器的开关</span></div><div class="t m0 x1 h2 y19 ff2 fs0 fc0 sc0 ls0 ws0">状态<span class="ff4">，</span>并根据不同的开关状态选择不同的<span class="_ _0"> </span><span class="ff1">PWM<span class="_ _1"> </span></span>波形<span class="ff4">，</span>实现对逆变器输出的控制<span class="ff3">。</span>此外<span class="ff4">，</span>还需要考虑</div><div class="t m0 x1 h2 y1a ff1 fs0 fc0 sc0 ls0 ws0">PWM<span class="_ _1"> </span><span class="ff2">波形对系统性能的影响<span class="ff4">，</span>确保其满足系统性能要求<span class="ff3">。</span></span></div></div><div class="pi" data-data='{"ctm":[1.568627,0.000000,0.000000,1.568627,0.000000,0.000000]}'></div></div>