储能科学与技术 ›› 2021, Vol. 10 ›› Issue (1): 355-361.doi: 10.19799/j.cnki.2095-4239.2020.0225

• 储能系统与工程 • 上一篇    下一篇

离网型风-光-抽水蓄能恒压供电系统

陈星宇1(), 刘忠1(), 寇攀高2, 邹淑云1, 潘宜桦1   

  1. 1.长沙理工大学能源与动力工程学院，湖南 长沙 410114
    2.国网湖南省电力有限公司电力科学研究院，湖南 长沙 410007
  • 收稿日期:2020-06-28 修回日期:2020-09-24 出版日期:2021-01-05 发布日期:2021-01-08
  • 通讯作者: 刘忠 E-mail:chenxingyu0401@foxmail.com;drliuzhong@csust.edu.cn
  • 作者简介:陈星宇（1995—），男，硕士研究生，主要研究方向为可再生能源与抽水蓄能联合优化运行，E-mail：chenxingyu0401@foxmail.com；
  • 基金资助:
    国家电网公司科技项目(5216A016000X);湖南省教育厅创新平台开放基金项目(18K050)

The off-grid wind-PV-PHES hybrid system with continuous power at constant voltage

Xingyu CHEN1(), Zhong LIU1(), Pangao KOU2, Shuyun ZOU1, Yihua PAN1   

  1. 1.School of Energy and Power Engineering, Changsha University of Science and Technology, Changsha 410114, Hunan, China
    2.Electric Power Research Institute, State Grid Hunan Electric Power Company Limited, Changsha 410007, Hunan, China
  • Received:2020-06-28 Revised:2020-09-24 Online:2021-01-05 Published:2021-01-08
  • Contact: Zhong LIU E-mail:chenxingyu0401@foxmail.com;drliuzhong@csust.edu.cn

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摘要：

根据风能与太阳能互补的特性，并利用农村地区常见的开口水井作为抽水蓄能的下水库，本工作提出了一种适用于偏远农村地区的小型离网风-光-抽水蓄能联合运行系统。采用了一种新颖的发电技术，使得系统的输出功率、输出电压不受风速和太阳能辐射强度变化的影响，且不需要使用电池、逆变器、控制器和控制电路等设备。建立了所提出系统的数学模型，基于湖南省某偏远农村24 h的真实数据进行了恒压供电系统电能输出特性的仿真与对比分析。结果表明，所提出的系统能够实现昼夜连续稳定运行，输出功率几乎保持与设计值相等的0.3 kW，输出电压也基本维持在220 V；在用电高峰时段8～22 h，整个系统的平均输出功率为294.5 W，最大值为300 W，平均输出电压为217.8 V，与设计值的功率偏差为1.8%，电压偏差为1%。与风电-抽水蓄能和光伏-抽水蓄能联合运行系统的结果相比，功率偏差分别降低了28.8%和34.8%，电压偏差分别降低了27.7%和34.1%。所提出系统具有简单、可靠、故障率低、无污染和供电恒压稳定的优点，有助于向风能、太阳能资源贫乏地区的偏远农村居民提供低成本的优质电能。

关键词: 风力发电, 光伏发电, 抽水蓄能, 恒压供电

Abstract:

A small off-grid wind-photovoltaic pumped hydroelectric energy storage (PV-PHES) hybrid system for remote rural areas is proposed, based on the complementary characteristics of wind and solar energy and an open well common in rural areas as a lower reservoir for a PHES system. In this paper, a novel power generation technique is used, where the output power and voltage of the system are unaffected by changes in wind speed or solar irradiation and does not require the use of batteries, inverters, controllers, or controlling circuits. A mathematical model of the proposed system is also established in this paper. The simulation and comparative analysis of the power output characteristics of the constant voltage power supply system is carried out using real data of a remote rural area in the Hunan Province over a period of 24 hours. The results indicate that the proposed system can achieve continuous and stable operation day and night, with an output power almost equal to the design value of 0.3 kW, and a nearly constant output voltage of 220 V. During the peak hours of 822 h, the average output power of the whole system was 294.5 W, the maximum value reached 300 W, and the average output voltage was 217.8 V, with a power deviation of 1.8% and a voltage deviation of 1% from the design value. Compared to the results of the combined operation of wind-PHES and PV-PHES hybrid systems, the power deviation is reduced by 28.8% and 34.8%, respectively, and the voltage deviation is reduced by 27.7% and 34.1%, respectively. The proposed system has the desirable features of simplicity, reliability, low failure rate, no pollution, and the ability to generate constant power at a constant voltage, which helps to provide low-cost and high-quality electricity to remote rural residents in areas with poor wind and solar resources.

Key words: wind energy, photovoltaic power, pumped hydroelectric energy storage, constant voltage

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