特高压直流接地极近区新能源入网运行方式对直流偏磁电流分布的影响研究
Gaoya dianqi湖北境内有多条直流外送通道，运行以来多次发生单极闭锁，直流偏磁的风险评估和防御治理问题突出。武汉特高压换流站的接地极位于随州广水岗上湾，接地极近区新能源站分布密集、数量众多，新能源接入电网方式对随州地区直流偏磁分布影响显著。本文开展随州地区新能源站多种接入电网方式下直流偏磁分析研究，获得了不同运行工况下新能源站和枢纽变电站直流偏磁电流分布规律，首次提出从优化电网调度运行方式的角度来治理直流偏磁问题。结果表明，金山风电场、吉阳光伏场对随州永阳和景星供区直流偏磁分布的影响比其他新能源站显著。根据分析 ...
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Gaoya dianqi, 2012 国家应对气候变化战略研究和国际合作中心主任李俊峰昨日在第二届北京国际储能大会上表示,目前国家发改委和国家能源局正在制定新能源发展规划,"十二五"时期 ...
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Gaoya dianqi交直流混联配电网线损小、供电容量高、电能质量优，是现代配电网的发展趋势。同时，交直流混联配电网故障后，分布式电源的不确定性会引起配电网故障切除后的电压波动。为解决此问题，提出基于储能控制的交直流混联配电网故障电压波动平抑方法，分析了交直流混合配电网故障特征，建立了配电网储能逆变器控制器模型，提出了基于变步长扰动控制的改进V/f控制策略，减小了光伏出力波动对故障配电网电压及频率安全的影响。仿真结果表明：通过对储能系统的控制，系统发生三相故障、两相短路故障和单相接地故障时，电压和频率波动都有一定的抑制作用 ...
李锰, 孙义豪, 樊江川, 赵岩
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