摘要
【目的】为了提高光伏的无功响应能力,限制电压越限问题,提出考虑大量分布式光伏并网下的基于分区的无功电压调差系数优化方法。【方法】以限制多种场景下各节点电压波动为目标,提出基于分区的含无功-电压调差系数节点的优化模型,利用“区间内部强耦合,分区之间弱耦合”的特点简化控制模型,实现光伏根据外界电压波动自主调节输出无功、充分利用无功剩余。【结果】以IEEE 33节点标准算例进行仿真。结果表明:基于分区的无功电压调差系数优化方法可以有效地利用无功进行节点电压调节,更利于满足无功优化精准性与快速性的要求。【结论】所提方法可以有效改善多种不同场景下配电网节点电压质量,充分利用光伏无功剩余。
[Objective]To improve the reactive response of photovoltaics and limit the problem of voltage overlimit,a subdivision-based reactive voltage adjustment coefficient optimization method is proposed considering a large number of distributed photovoltaics connected to the grid.[Methods]To limit the voltage fluctuations of each node under various scenarios,an optimization model of nodes with reactive voltage differential coefficients based on partitions is proposed.The control model is simplified by using the characteristics of"strong coupling within the interval and weak coupling between partitions"to realize that photovoltaics can independently adjust the reactive output according to external voltage fluctuations and make full use of the reactive residual.[Results]The simulation results of the IEEE 33 node standard example show that the partition-based reactive voltage adjustment coefficient optimization method can effectively use the reactive to regulate node voltage,which is more conducive to meeting the requirements of accuracy and speed of reactive optimization.[Conclusions]The method proposed in this study can effectively improve the voltage quality of distribution grid nodes under various scenarios,effectively utilizing the photovoltaic reactive residual.
作者
莫静山
宋娜
范凯民
MO Jingshan;SONG Na;FAN Kaimin(Key Laboratory of Modern Power System Simulation and Control&Renewable Energy Technology,Ministry of Education(Northeast Electric Power University),Jilin 132012,Jilin Province,China)
出处
《电力建设》
北大核心
2025年第8期12-21,共10页
Electric Power Construction
基金
国家自然科学基金项目(52307084)。
关键词
电压调差系数优化
无功电压控制
配电网电压
分布式光伏
optimization of voltage adjustment coefficient
reactive power voltage control
distribution network voltage
distributed photovoltaic
