面向配电网优化运行的混合储能容量配置

发布时间：2018-01-27 12:25

本文关键词： 主动配电网混合储能系统希尔伯特-黄变换容量配置全寿命周期成本　出处：《电网技术》2017年11期 　论文类型：期刊论文

【摘要】：为提高配电网对分布式光伏的消纳能力,实现主动配电网优化运行,提出一种基于改进希尔伯特-黄变换(Hilbert-Huang transform,HHT)的混合储能(hybrid energy storage system,HESS)容量优化配置方法。该方法首先获得光储系统参与配电网运行的最优出力与光伏实际出力之间的不平衡功率,将其作为混合储能的参考功率,采用集合经验模态分解(ensemble empirical mode decomposition,EEMD)将不平衡功率分解为一系列固有模态函数(intrinsic mode functions,IMF),通过递归希尔伯特变换得到各IMF的瞬时频率-时间曲线,可有效避免传统HHT存在的模态混叠效应,提高瞬时频率的准确性。根据功率型和能量型储能的特性,以瞬时频率-时间曲线混叠最少为原则确定分频频率,采用功率型储能和能量型储能分别对不平衡功率的高频分量和低频分量进行平抑。最后,考虑充放电效率、荷电状态和全寿命周期成本,提出经济最优配置方案。
[Abstract]:In order to improve the absorption ability of distribution network to distributed photovoltaic, the optimal operation of active distribution network is realized. A Hilbert-Huang transform based on improved Hilbert-Huang transform is proposed. Hybrid energy storage system. This method firstly obtains the unbalanced power between the optimal output power of the optical storage system participating in the distribution network operation and the actual output of photovoltaic system, which is used as the reference power for hybrid energy storage. The ensemble empirical mode decomposition is decomposed by means of set empirical mode decomposition. EEMD decomposes the unbalanced power into a series of intrinsic mode functions. The instantaneous frequency-time curves of each IMF can be obtained by recursive Hilbert transform, which can effectively avoid the modal aliasing effect of traditional HHT. The accuracy of instantaneous frequency is improved. According to the characteristics of power type and energy type energy storage, the frequency division frequency is determined according to the principle of minimum aliasing of instantaneous frequency-time curve. The high-frequency and low-frequency components of unbalanced power are suppressed by power storage and energy storage, respectively. Finally, charge and discharge efficiency, charge state and life cycle cost are considered. The economic optimal allocation scheme is put forward.
【作者单位】：南京工程学院电力工程学院;国网江苏省电力公司电力科学研究院;江苏科能电力工程咨询有限公司;国网南通供电公司;国网苏州市吴江区供电公司;
【基金】：国家自然科学基金项目(51707089) 国家电网公司总部科技项目(5210EF17001C)~~
【分类号】：TM732
【正文快照】： 0引言以光伏为代表的清洁能源发电技术,正深刻改变着全世界范围内的电力与能源结构。然而,光伏发电存在随机性、间歇性等问题,高渗透率光伏并网会对配电网潮流分布、电能质量等带来严重影响。因此,需在配电网中配置储能以平衡光伏电站输出功率的随机波动[1]。储能系统(energy

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