模块化多电平流器，MMC-HVDC直流输电系统，单个桥臂4个子模块（5电平），采用载波移相调制simulink仿真模型直流电压4KV，功率等级5MW流站1：定直流母线电压控制+定无功功率控制；
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模块化多电平流器，MMC-HVDC直流输电系统，单个桥臂4个子模块（5电平），采用载波移相调制simulink仿真模型直流电压4KV，功率等级5MW流站1：定直流母线电压控制+定无功功率控制；流站2：定有功功率控制+定无功功率控制二倍频环流抑制控制+子模块电容电压均衡控制（附参考文献和pi控制器参数计算，内容详实，适合初学者） <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/90239559/2/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/90239559/bg1.jpg"/><div class="t m0 x1 h2 y1 ff1 fs0 fc0 sc0 ls0 ws0">**<span class="ff2">模块化多电平换流器<span class="ff3">（</span></span>MMC-HVDC<span class="ff3">）<span class="ff2">直流输电系统技术详解</span></span>**</div><div class="t m0 x1 h2 y2 ff2 fs0 fc0 sc0 ls0 ws0">一<span class="ff4">、</span>引言</div><div class="t m0 x1 h2 y3 ff2 fs0 fc0 sc0 ls0 ws0">随着电力电子技术的不断发展<span class="ff3">，</span>高压直流输电<span class="ff3">（<span class="ff1">HVDC</span>）</span>技术在电力系统中的地位愈发重要<span class="ff4">。</span>其中<span class="ff3">，</span>模</div><div class="t m0 x1 h2 y4 ff2 fs0 fc0 sc0 ls0 ws0">块化多电平换流器<span class="ff3">（<span class="ff1">MMC-HVDC</span>）</span>以其模块化<span class="ff4">、</span>高电压等级和低谐波污染等优点<span class="ff3">，</span>成为了直流输电领</div><div class="t m0 x1 h2 y5 ff2 fs0 fc0 sc0 ls0 ws0">域的研究热点<span class="ff4">。</span>本文将详细分析<span class="_ _0"> </span><span class="ff1">MMC-HVDC<span class="_ _1"> </span></span>直流输电系统的基本结构<span class="ff3">，</span>以一个具体的仿真模型为例<span class="ff3">，</span></div><div class="t m0 x1 h2 y6 ff2 fs0 fc0 sc0 ls0 ws0">探讨其工作原理及控制策略<span class="ff4">。</span></div><div class="t m0 x1 h2 y7 ff2 fs0 fc0 sc0 ls0 ws0">二<span class="ff4">、<span class="ff1">MMC-HVDC<span class="_ _1"> </span></span></span>系统概述</div><div class="t m0 x1 h2 y8 ff1 fs0 fc0 sc0 ls0 ws0">MMC-HVDC<span class="_ _1"> </span><span class="ff2">系统主要由两个换流站组成<span class="ff3">，</span>每个换流站采用模块化多电平换流器结构<span class="ff4">。</span>本文以单个桥臂</span></div><div class="t m0 x1 h2 y9 ff2 fs0 fc0 sc0 ls0 ws0">包含四个子模块<span class="ff3">（</span>共形成<span class="_ _0"> </span><span class="ff1">5<span class="_ _1"> </span></span>电平输出<span class="ff3">）</span>的<span class="_ _0"> </span><span class="ff1">MMC<span class="_ _1"> </span></span>为例<span class="ff3">，</span>进行后续的分析<span class="ff4">。</span>这种结构采用载波移相调制技</div><div class="t m0 x1 h2 ya ff2 fs0 fc0 sc0 ls0 ws0">术<span class="ff3">，</span>能有效降低输出电压的谐波含量<span class="ff3">，</span>提高系统效率<span class="ff4">。</span></div><div class="t m0 x1 h2 yb ff2 fs0 fc0 sc0 ls0 ws0">三<span class="ff4">、<span class="ff1">Simulink<span class="_ _1"> </span></span></span>仿真模型分析</div><div class="t m0 x1 h2 yc ff1 fs0 fc0 sc0 ls0 ws0">Simulink<span class="_ _1"> </span><span class="ff2">是<span class="_ _0"> </span></span>MATLAB/Simulink<span class="_ _1"> </span><span class="ff2">中用于建模和仿真的工具包<span class="ff3">，</span>可以很好地模拟<span class="_ _0"> </span></span>MMC-HVDC<span class="_ _1"> </span><span class="ff2">直流输</span></div><div class="t m0 x1 h2 yd ff2 fs0 fc0 sc0 ls0 ws0">电系统的运行情况<span class="ff4">。</span>在仿真模型中<span class="ff3">，</span>我们设定直流电压为<span class="_ _0"> </span><span class="ff1">4KV<span class="ff3">，</span></span>功率等级为<span class="_ _0"> </span><span class="ff1">5MW<span class="ff4">。</span></span>这样的设定能够更</div><div class="t m0 x1 h2 ye ff2 fs0 fc0 sc0 ls0 ws0">好地观察和分析系统在不同工况下的运行特性<span class="ff4">。</span></div><div class="t m0 x1 h2 yf ff2 fs0 fc0 sc0 ls0 ws0">四<span class="ff4">、</span>换流站控制策略</div><div class="t m0 x1 h2 y10 ff1 fs0 fc0 sc0 ls0 ws0">1.<span class="_ _2"> </span><span class="ff2">换流站<span class="_ _0"> </span></span>1<span class="ff3">：<span class="ff2">采用定直流母线电压控制和定无功功率控制<span class="ff4">。</span>这种控制策略能够保证直流母线电压的</span></span></div><div class="t m0 x2 h2 y11 ff2 fs0 fc0 sc0 ls0 ws0">稳定<span class="ff3">，</span>同时根据系统需求调节无功功率的输出<span class="ff4">。</span></div><div class="t m0 x1 h2 y12 ff1 fs0 fc0 sc0 ls0 ws0">2.<span class="_ _2"> </span><span class="ff2">换流站<span class="_ _0"> </span></span>2<span class="ff3">：<span class="ff2">采用定有功功率控制和定无功功率控制<span class="ff4">。</span>通过调整有功功率的输出</span>，<span class="ff2">实现对系统功率</span></span></div><div class="t m0 x2 h2 y13 ff2 fs0 fc0 sc0 ls0 ws0">的灵活调度<span class="ff4">。</span>同时<span class="ff3">，</span>通过无功功率的控制<span class="ff3">，</span>维持系统的无功平衡<span class="ff4">。</span></div><div class="t m0 x1 h2 y14 ff2 fs0 fc0 sc0 ls0 ws0">五<span class="ff4">、</span>二倍频环流抑制控制及子模块电容电压均衡控制</div><div class="t m0 x1 h2 y15 ff2 fs0 fc0 sc0 ls0 ws0">在<span class="_ _0"> </span><span class="ff1">MMC-HVDC<span class="_ _1"> </span></span>系统中<span class="ff3">，</span>二倍频环流和子模块电容电压的均衡是两个重要的问题<span class="ff4">。</span>为此<span class="ff3">，</span>系统采用了二</div><div class="t m0 x1 h2 y16 ff2 fs0 fc0 sc0 ls0 ws0">倍频环流抑制控制和子模块电容电压均衡控制策略<span class="ff4">。</span>这两种控制策略能够有效地解决上述问题<span class="ff3">，</span>保证</div><div class="t m0 x1 h2 y17 ff2 fs0 fc0 sc0 ls0 ws0">系统的稳定运行<span class="ff4">。</span></div><div class="t m0 x1 h2 y18 ff2 fs0 fc0 sc0 ls0 ws0">六<span class="ff4">、<span class="ff1">PI<span class="_ _1"> </span></span></span>控制器参数计算及实际应用</div><div class="t m0 x1 h2 y19 ff1 fs0 fc0 sc0 ls0 ws0">PI<span class="_ _1"> </span><span class="ff2">控制器在<span class="_ _0"> </span></span>MMC-HVDC<span class="_ _1"> </span><span class="ff2">系统中扮演着重要的角色<span class="ff4">。</span>本文将详细介绍<span class="_ _0"> </span></span>PI<span class="_ _1"> </span><span class="ff2">控制器的参数计算方法<span class="ff3">，</span>并</span></div><div class="t m0 x1 h2 y1a ff2 fs0 fc0 sc0 ls0 ws0">给出具体的计算过程和结果<span class="ff4">。</span>同时<span class="ff3">，</span>还将分析这些参数在实际系统中的应用情况<span class="ff3">，</span>为初学者提供详实</div><div class="t m0 x1 h2 y1b ff2 fs0 fc0 sc0 ls0 ws0">的参考<span class="ff4">。</span></div></div><div class="pi" data-data='{"ctm":[1.568627,0.000000,0.000000,1.568627,0.000000,0.000000]}'></div></div>