| 引用本文: | 赵政嘉,李海波,赵宇明,等.多类型分布式电源接入下的低压交流与直流配电网运行经济性对比[J].电力系统保护与控制,2020,48(12):50-61.[点击复制] |
| ZHAO Zhengjia,LI Haibo,ZHAO Yuming,et al.Operational economic comparison of low voltage AC and DC distribution networks with multi-type distributed generation integration[J].Power System Protection and Control,2020,48(12):50-61[点击复制] |
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| 摘要: |
| 配电网运行经济性是配电网经济评估的重要组成部分，直接影响着用户用电效益。随着直流配电网的快速发展以及多类型分布式电源接入低压配电网，如何定量评估低压交流与直流配电网运行损耗，进而对比二者运行经济性，对于未来低压配电系统的规划和运行具有重要指导意义。根据含有多类型分布式电源接入的低压交流与直流配电系统典型拓扑结构，建立了基于系统全环节功率损耗的交直流运行经济性对比评估模型，并以运行经济性为优化目标建立考虑储能充放电状态的配网运行策略优化模型。最后基于深圳中美中心低压直流配网示范工程实际数据对系统典型运行日的功率损耗进行分类统计，对比了交流与直流配网运行经济性的差异以及储能接入的影响。结果表明，在多类型分布式电源接入下，系统功率损耗呈现明显的时空分布差异性，且长期运行下低压直流配电网运行经济性具有一定优势。 |
| 关键词: 直流配电网 交流配电网 分布式电源 功率损耗 运行经济性 |
| DOI：10.19783/j.cnki.pspc.190982 |
| 投稿时间：2019-08-14修订日期：2019-12-30 |
| 基金项目:中国南方电网公司重点科技项目资助(090000KK52180116);电力系统国家重点实验室资助课题(SKLD19KZ04);四川省科技计划项目资助(2019YJ0631) |
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| Operational economic comparison of low voltage AC and DC distribution networks with multi-type distributed generation integration |
| ZHAO Zhengjia,LI Haibo,ZHAO Yuming,LIU Guowei,YANG Chao,JIANG Shiyong,LI Yutong |
| (College of Electrical Engineering, Sichuan University, Chengdu 610065, China;Sichuan Energy Internet Research Institute, Tsinghua University, Chengdu 610213, China;Shenzhen Power Supply Bureau Co., Ltd., Shenzhen 518020, China;Zhuhai Geli Electrical Appliances Co., Ltd., Shenzhen 519070, China;Shenzhen Institute of Building Research Co., Ltd., Shenzhen 518049, China) |
| Abstract: |
| The operational economy of a distribution network is an important part of its economic evaluation. It directly affects the power efficiency of consumers. With the rapid development of the DC distribution network and the integration of multi-type distributed generation to a low-voltage network, how to quantitatively evaluate the operational loss of LVAC (low voltage AC) and LVDC (low voltage DC) distribution networks and further compare their operational economy have important guiding significance for the planning and operation of the future low-voltage distribution system. Given a typical topological structure of LVAC and LVDC distribution networks with multi-type distributed generation, an operational economy comparison evaluation model between LVAC and LVDC based on the whole system power loss is established. Then taking the operational economy as an objective, an optimization model of the operation strategy considering the charge-discharge state of energy storage is proposed. Finally, based on the data of the demonstration project of Shenzhen China-US Center LVDC distribution network, the power loss in the typical operation day is calculated and classified. Then the operational economy of AC and DC distribution networks is compared, while the impact of energy storage is discussed. The results show that the power loss of the system is different in spatial and temporal distribution with multi-type distributed generation integration, and the LVDC distribution network has certain advantages in operational economy under long-term operation. This work is supported by Key Science and Technology Project of China Southern Power Grid Company (No. 090000KK52180116), National Key Laboratory of Power System (No. SKLD19KZ04), and Sichuan Provincial Science and Technology Project (No. 2019YJ0631). |
| Key words: DC distribution network AC distribution network distributed generation power loss operational economic |
