| 引用本文: | 李文,陈海东,崔战涛,等.基于离散傅里叶频谱分析的直流配电网储能规划配置方法[J].电力系统保护与控制,2019,47(7):92-98.[点击复制] |
| LI Wen,CHEN Haidong,CUI Zhantao,et al.A configuration method of energy storage device in DC distribution network based on discrete Fourier spectrum analysis[J].Power System Protection and Control,2019,47(7):92-98[点击复制] |
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| 摘要: |
| 直流配电网中合理配置适当类型及容量的储能设备，可有效抑制直流电压闪变，提高系统运行稳定性和故障穿越能力。储能设备的配置属于直流配电网建设的前期规划设计范畴，以配网对储能设备的功率需求样本数据为基础。首先对功率样本数据进行离散傅里叶的频谱分析，得到低频段基础功率和高频段波动功率，考虑储能设备的储能周期和响应速率，采用储能电池和超级电容作为直流配电网的混合储能方案。引入权重系数对多维的低频段基础功率进行权重优化，配置储能电池的额定功率；然后对多维高频段的波动功率进行更新，在功率平衡的约束条件下配置超级电容的额定功率。同时，引入表征储能设备荷电状态SOC越限次数的影响指标，分析不同储能设备容量与影响指标之间的关系，寻求降低影响指标的储能设备容量的临界值。最后，以分布式新能源与负荷间的功率差额作为储能设备的功率需求样本数据，并建立算例对储能设备的功率和容量的配置方法进行验证。 |
| 关键词: 直流配电网 规划配置 离散傅里叶频谱分析 混合储能 |
| DOI：10.7667/PSPC181244 |
| 投稿时间：2018-10-08修订日期：2018-12-10 |
| 基金项目:国家重点研发计划“智能电网技术与装备”重点专项资助(2018YFB0905000) |
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| A configuration method of energy storage device in DC distribution network based on discrete Fourier spectrum analysis |
| LI Wen,CHEN Haidong,CUI Zhantao,YANG Ning,WANG Dongxia,REN Airong |
| (Shizuishan Power Supply Company, State Grid Ningxia Electric Power Co., Shizuishan 753000, China) |
| Abstract: |
| Reasonable configuration of proper type and capacity of energy storage device in DC distribution network can effectively suppress DC voltage flicker and promote reliable stability of system operation and fault ride-through capability. The configuration of energy storage device is the pre-planning design of the DC distribution network construction, which is based on the power supply sample data of the energy storage device in the distribution network. The discrete Fourier spectrum analysis is performed on the power sample data of the energy storage device to obtain the base power in the low frequency and the fluctuation power in the high frequency. A hybrid energy storage device is obtained considering response rate and energy storage cycle characteristics. Then, a weight coefficient is introduced to optimize the weight of the multi-dimensional power in low frequency, to configure the rated power of the energy storage battery. After that, the configuration of the rated power of the supercapacitor is proposed under the constraints of power balance. Additionally, an impact index is introduced to characterize the relationship between State Of Capacity (SOC) and capacity of the energy storage device, to seek the threshold for the capacity of energy storage device reducing the impact. The validity of the method above is verified by an example taking the power difference between distributed renewable energy and load as the sample data of power requirement for energy storage device. This work is supported by National Key Research and Development Program of China “Smart Grid Techniques and Equipments” (No. 2018YFB0905000). |
| Key words: DC distribution network capacity configuration discrete Fourier spectrum analysis hybrid energy storage |
