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大规模新能源集中并网地区无功电压控制中的无功分配不均衡、无功环流问题日益突出，严重影响了系统安全稳定和新能源消纳。对此提出一种基于无功电压控制系统（AVC）子站电压控制的新能源集群无功环流抑制策略。通过分析新能源场站无功环流现象的特征及产生原因，提出无功环流的评价指标；依据无功环流产生原因，在保证满足电压指令值的前提下，重新分配新能源集群的无功功率，实现对无功环流的抑制；最后在RT-LAB平台搭建仿真测试模型，验证了所提策略可以在保证汇集母线电压稳定的前提下，减小无功不均衡，抑制无功环流。
Abstract：The problems of unbalanced reactive power distribution and reactive power circulation in reactive power and voltage control in large-scale new energy centralized grid-connected areas are increasingly prominent, which seriously affect the security and stability of the system and the consumption of new energy. This paper proposes a reactive circulating current suppression strategy for new energy clusters based on AVC substation voltage control. By analyzing the characteristics and causes of reactive circulating current phenomenon in renewable energy field stations, the author proposes an evaluation index for reactive power circulating current. According to the causes of circulating reactive power, the reactive power of the new energy cluster is redistributed to achieve the suppression of circulating reactive power while ensuring that the voltage command value is satisfied. Finally, a simulation test model is built in RT-LAB platform to verify that the proposed strategy can reduce reactive power imbalance and suppress reactive circulating current while ensuring the voltage stability of the bus voltage.
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基本信息:
DOI：10.19929/j.cnki.nmgdljs.2023.0049
中图分类号:TM714.2
引用信息:
[1]吴宇辉1,尚斌2,杨鹏飞2等.新能源集群无功环流抑制策略研究[J].内蒙古电力技术,2023,41(04):13-19.DOI:10.19929/j.cnki.nmgdljs.2023.0049.
基金信息:
国网冀北电力有限公司科技项目“基于大数据的新能源场站运行特性建模与集群功率控制策略优化技术研究”（52018K220016）