| 引用本文: | 王书征,孙玉柱,赵景涛,郑舒,吴志,石春虎.含大规模分布式光伏的低压配电网综合治理技术[J].电力自动化设备,2026,46(1):171-178,208 |
| WANG Shuzheng,SUN Yuzhu,ZHAO Jingtao,ZHENG Shu,WU Zhi,SHI Chunhu.Comprehensive treatment technology of low-voltage distribution network with large-scale distributed photovoltaic[J].Electric Power Automation Equipment,2026,46(1):171-178,208 |
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| 摘要: |
| 随着越来越多的分布式光伏并入低压配电网，配电网的线路损耗、电压越限、三相不平衡等问题日益严重，而单一的治理手段无法满足光伏并网产生的多样化治理需求。为此，提出一种基于电抗器、AC/DC变换器协调配合的低压台区综合治理装置，该装置提供2个直流接口，可以灵活增配储能以及实现台区间的柔性互联。基于该装置，构建以减小台区电压偏差、治理三相不平衡以及降低网损为目标的低压配电网运行优化模型；利用对称半正定规划算法，通过凸松弛将原始的非凸非线性模型转换成便于求解的对称半正定规划模型。在某实际系统上对不同综合治理装置配置方式下的治理效果进行对比分析，验证了综合治理装置对解决分布式光伏并网带来的一系列问题的有效性。 |
| 关键词: 综合治理 光伏并网 低压台区 对称半正定规划算法 配电网 运行优化 |
| DOI：10.16081/j.epae.202509012 |
| 分类号:TM71;TM615 |
| 基金项目:国家自然科学基金资助项目(52177077) |
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| Comprehensive treatment technology of low-voltage distribution network with large-scale distributed photovoltaic |
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WANG Shuzheng1, SUN Yuzhu1, ZHAO Jingtao2, ZHENG Shu2,3, WU Zhi3, SHI Chunhu2
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1.School of Electric Power Engineering, Nanjing Institute of Technology, Nanjing 211167, China;2.NARI Technology Company Limited, Nanjing 211106, China;3.School of Electrical Engineering, Southeast University, Nanjing 210096, China
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| Abstract: |
| With the increasing gird connection of distributed photovoltaic into low-voltage distribution network, issues such as line loss, voltage violation and three-phase imbalance of distribution network have become increasingly severe. Single treatment measure cannot meet the diverse treatment needs caused by the grid connection of photovoltaic. Therefore, a comprehensive treatment device based on the coordinated operation of reactors and AC/DC converters is proposed for low-voltage substation area, which offers two DC interfaces to flexibly add energy storage and realize flexible interconnection between substation areas. Based on the device, an operation optimization model of low-voltage distribution network is constructed with the goals of reducing voltage deviation, treating three-phase imbalance, and reducing network loss of substation area. Using the symmetric semi-definite programming algorithm, the original non-convex nonlinear model is converted into a symmetric semi-definite programming model that is easier to be solved through convex relaxation. The treatment effect under different configuration modes of comprehensive treatment device is compared and analyzed on an actual system, which verifies the effectiveness of comprehensive treatment device in solving series issues brought by the grid connection of distributed photovoltaic. |
| Key words: comprehensive treatment photovoltaic grid connection low-voltage substation area symmetric semi-definite programming algorithm distribution network operation optimization |
