级联H桥并网 10KV 每相12个H桥，单个H桥直流电压为850V，采用电流闭环控制 为了测试系统控制性能效果，在1s时，控制输出电流从2000A下降到1500A，控制效果好，电流电压无超调，网侧
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级联H桥并网 10KV。每相12个H桥，单个H桥直流电压为850V，采用电流闭环控制。为了测试系统控制性能效果，在1s时，控制输出电流从2000A下降到1500A，控制效果好，电流电压无超调，网侧电流THD只有0.31%，控制电流越小，畸变率越小为0.05%，符合并网标准。整个仿真全部离散化，采用离散解析器，离散PI。没有采用Matlab自带的模块。 <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/90239540/2/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/90239540/bg1.jpg"/><div class="t m0 x1 h2 y1 ff1 fs0 fc0 sc0 ls0 ws0">标题<span class="ff2">：</span>基于电流闭环控制的级联<span class="_ _0"> </span><span class="ff3">H<span class="_ _1"> </span></span>桥并网系统仿真分析</div><div class="t m0 x1 h2 y2 ff1 fs0 fc0 sc0 ls0 ws0">摘要<span class="ff2">：</span>本文针对级联<span class="_ _0"> </span><span class="ff3">H<span class="_ _1"> </span></span>桥并网系统进行了仿真分析<span class="ff2">，</span>系统每相包含<span class="_ _0"> </span><span class="ff3">12<span class="_ _1"> </span></span>个<span class="_ _0"> </span><span class="ff3">H<span class="_ _1"> </span></span>桥<span class="ff2">，</span>单个<span class="_ _0"> </span><span class="ff3">H<span class="_ _1"> </span></span>桥的直流电压</div><div class="t m0 x1 h2 y3 ff1 fs0 fc0 sc0 ls0 ws0">为<span class="_ _0"> </span><span class="ff3">850V<span class="ff2">，</span></span>并采用电流闭环控制<span class="ff4">。</span>通过测试系统在<span class="_ _0"> </span><span class="ff3">1s<span class="_ _1"> </span></span>时从<span class="_ _0"> </span><span class="ff3">2000A<span class="_ _1"> </span></span>降至<span class="_ _0"> </span><span class="ff3">1500A<span class="_ _1"> </span></span>的控制性能<span class="ff2">，</span>证明了该</div><div class="t m0 x1 h2 y4 ff1 fs0 fc0 sc0 ls0 ws0">系统具有良好的控制效果<span class="ff4">。</span>仿真结果显示<span class="ff2">，</span>系统的电流电压无超调<span class="ff2">，</span>网侧电流总谐波失真率<span class="ff2">（<span class="ff3">THD</span>）</span></div><div class="t m0 x1 h2 y5 ff1 fs0 fc0 sc0 ls0 ws0">仅为<span class="_ _0"> </span><span class="ff3">0.31%<span class="ff2">，</span></span>控制电流越小<span class="ff2">，</span>畸变率越小为<span class="_ _0"> </span><span class="ff3">0.05%<span class="ff2">，</span></span>并且符合并网标准<span class="ff4">。</span>本文采用离散化方法进行整</div><div class="t m0 x1 h2 y6 ff1 fs0 fc0 sc0 ls0 ws0">体仿真<span class="ff2">，</span>并采用离散解析器和离散<span class="_ _0"> </span><span class="ff3">PI<span class="_ _1"> </span></span>控制策略<span class="ff2">，</span>未使用<span class="_ _0"> </span><span class="ff3">Matlab<span class="_ _1"> </span></span>自带的模块<span class="ff4">。</span></div><div class="t m0 x1 h2 y7 ff1 fs0 fc0 sc0 ls0 ws0">关键词<span class="ff2">：</span>级联<span class="_ _0"> </span><span class="ff3">H<span class="_ _1"> </span></span>桥并网<span class="ff4">、</span>电流闭环控制<span class="ff4">、</span>仿真分析<span class="ff4">、</span>谐波失真率<span class="ff4">、</span>离散化<span class="ff4">、</span>离散解析器<span class="ff4">、</span>离散<span class="_ _0"> </span><span class="ff3">PI<span class="_ _1"> </span></span>控</div><div class="t m0 x1 h2 y8 ff1 fs0 fc0 sc0 ls0 ws0">制</div><div class="t m0 x1 h2 y9 ff1 fs0 fc0 sc0 ls0 ws0">引言<span class="ff2">：</span></div><div class="t m0 x1 h2 ya ff1 fs0 fc0 sc0 ls0 ws0">随着电力系统的发展<span class="ff2">，</span>对并网系统的控制要求越来越高<span class="ff4">。</span>级联<span class="_ _0"> </span><span class="ff3">H<span class="_ _1"> </span></span>桥并网系统作为一种高性能<span class="ff4">、</span>可靠性</div><div class="t m0 x1 h2 yb ff1 fs0 fc0 sc0 ls0 ws0">强的电力电子装置<span class="ff2">，</span>被广泛应用于风力发电<span class="ff4">、</span>光伏发电等领域<span class="ff4">。</span>在级联<span class="_ _0"> </span><span class="ff3">H<span class="_ _1"> </span></span>桥并网系统中<span class="ff2">，</span>采用电流闭</div><div class="t m0 x1 h2 yc ff1 fs0 fc0 sc0 ls0 ws0">环控制可以有效提高系统的控制性能<span class="ff2">，</span>降低谐波失真率<span class="ff4">。</span>本文将针对级联<span class="_ _0"> </span><span class="ff3">H<span class="_ _1"> </span></span>桥并网系统进行仿真分析</div><div class="t m0 x1 h2 yd ff2 fs0 fc0 sc0 ls0 ws0">，<span class="ff1">以验证其控制性能与谐波失真率等指标的优异表现<span class="ff4">。</span></span></div><div class="t m0 x1 h2 ye ff3 fs0 fc0 sc0 ls0 ws0">1.<span class="_ _2"> </span><span class="ff1">系统结构及参数设置</span></div><div class="t m0 x1 h2 yf ff1 fs0 fc0 sc0 ls0 ws0">级联<span class="_ _0"> </span><span class="ff3">H<span class="_ _1"> </span></span>桥并网系统由多个<span class="_ _0"> </span><span class="ff3">H<span class="_ _1"> </span></span>桥连接而成<span class="ff2">，</span>每相含有<span class="_ _0"> </span><span class="ff3">12<span class="_ _1"> </span></span>个<span class="_ _0"> </span><span class="ff3">H<span class="_ _1"> </span></span>桥<span class="ff4">。</span>单个<span class="_ _0"> </span><span class="ff3">H<span class="_ _1"> </span></span>桥的直流电压为<span class="_ _0"> </span><span class="ff3">850V<span class="ff4">。</span></span>本文</div><div class="t m0 x1 h2 y10 ff1 fs0 fc0 sc0 ls0 ws0">所采用的控制策略为电流闭环控制<span class="ff2">，</span>即通过对电流进行反馈<span class="ff4">、</span>控制和调节<span class="ff2">，</span>实现系统的稳定运行<span class="ff4">。</span></div><div class="t m0 x1 h2 y11 ff3 fs0 fc0 sc0 ls0 ws0">2.<span class="_ _2"> </span><span class="ff1">控制性能测试</span></div><div class="t m0 x1 h2 y12 ff1 fs0 fc0 sc0 ls0 ws0">为了评估系统的控制性能<span class="ff2">，</span>本文在<span class="_ _0"> </span><span class="ff3">1s<span class="_ _1"> </span></span>的时间内对系统进行了控制输出电流从<span class="_ _0"> </span><span class="ff3">2000A<span class="_ _1"> </span></span>下降到<span class="_ _0"> </span><span class="ff3">1500A</span></div><div class="t m0 x1 h2 y13 ff1 fs0 fc0 sc0 ls0 ws0">的测试<span class="ff4">。</span>实验结果表明<span class="ff2">，</span>系统控制效果良好<span class="ff2">，</span>无超调现象出现<span class="ff4">。</span>同时<span class="ff2">，</span>通过对电流电压的波形分析<span class="ff2">，</span></div><div class="t m0 x1 h2 y14 ff1 fs0 fc0 sc0 ls0 ws0">也可以看出系统的稳定性和响应速度都达到了较高水平<span class="ff4">。</span></div><div class="t m0 x1 h2 y15 ff3 fs0 fc0 sc0 ls0 ws0">3.<span class="_ _2"> </span><span class="ff1">谐波失真率分析</span></div><div class="t m0 x1 h2 y16 ff1 fs0 fc0 sc0 ls0 ws0">谐波失真率是评估并网系统质量的重要指标之一<span class="ff4">。</span>本文通过分析系统在网侧电流上的谐波失真率<span class="ff2">（</span></div><div class="t m0 x1 h2 y17 ff3 fs0 fc0 sc0 ls0 ws0">THD<span class="ff2">），<span class="ff1">来评估系统的谐波抑制能力<span class="ff4">。</span>仿真结果显示</span>，<span class="ff1">系统的网侧电流<span class="_ _0"> </span></span></span>THD<span class="_ _1"> </span><span class="ff1">仅为<span class="_ _0"> </span></span>0.31%<span class="ff2">，<span class="ff1">远低于并网</span></span></div><div class="t m0 x1 h2 y18 ff1 fs0 fc0 sc0 ls0 ws0">标准要求<span class="ff2">，</span>表明系统具有较好的谐波抑制能力<span class="ff4">。</span></div><div class="t m0 x1 h2 y19 ff3 fs0 fc0 sc0 ls0 ws0">4.<span class="_ _2"> </span><span class="ff1">控制电流越小<span class="ff2">，</span>畸变率越小</span></div><div class="t m0 x1 h2 y1a ff1 fs0 fc0 sc0 ls0 ws0">本文进一步分析了系统控制电流越小<span class="ff2">，</span>谐波失真率越小的关系<span class="ff4">。</span>仿真结果表明<span class="ff2">，</span>在控制电流为<span class="_ _0"> </span><span class="ff3">1500A</span></div><div class="t m0 x1 h2 y1b ff1 fs0 fc0 sc0 ls0 ws0">时<span class="ff2">，</span>系统的畸变率仅为<span class="_ _0"> </span><span class="ff3">0.05%<span class="ff2">，</span></span>比较理想<span class="ff2">，</span>符合并网标准的要求<span class="ff4">。</span>因此<span class="ff2">，</span>对于级联<span class="_ _0"> </span><span class="ff3">H<span class="_ _1"> </span></span>桥并网系统的设</div><div class="t m0 x1 h2 y1c ff1 fs0 fc0 sc0 ls0 ws0">计与控制<span class="ff2">，</span>应尽量降低控制电流<span class="ff2">，</span>以优化系统的谐波特性和控制性能<span class="ff4">。</span></div><div class="t m0 x1 h2 y1d ff3 fs0 fc0 sc0 ls0 ws0">5.<span class="_ _2"> </span><span class="ff1">离散化方法与控制策略选择</span></div></div><div class="pi" data-data='{"ctm":[1.568627,0.000000,0.000000,1.568627,0.000000,0.000000]}'></div></div>