风光储联合发电系统中储能设备容量配置与运行策略研究

发布时间：2018-02-27 17:54

本文关键词： 风光储系统容量配置神经网络遗传算法平滑波动运行策略　出处：《华北电力大学》2014年硕士论文　论文类型：学位论文

【摘要】：风能、太阳能等可再生能源具有间歇性、波动性及不确定性等特点。随着风力发电、光伏发电在电网中的比例越来越高,对电网的安全可靠运行影响带来越来越多挑战。储能系统凭借其可充可放的运行特性,能有效克服可再生能源发电系统的不确定性。本文在分析风光储联合发电系统的基础上,主要对储能系统的容量配置问题和运行策略问题进行了研究,主要内容如下： (1)在分析风光储联合发电系统方面,首先详细阐述了风力发电原理、光伏发电原理；然后对储能技术,特别是应用于电力系统中的储能技术进行了详细分析,同时介绍了储能系统的充放电原理；最后,重点分析了风光储联合发电系统接入电网特性和控制要求。 (2)在储能容量配置方面,首先分析风光储联合发电系统工作原理,介绍用于平滑风、光有功功率波动的传统控制策略,作为储能系统容量配置中仿真计算的参考方法；然后,分析风电场、光伏电站输出功率平滑度的判据标准以及输出功率波动特性,在研究国家标准对风、光波动要求的前提下,提出了适用于储能系统容量配置的平滑度判据标准,并概括了反映输出功率波动特性的特征参数；最后,提出了一种储能系统容量配置方法,包括建立波动特性、储能系统参数——功率平滑度短期神经网络模型、储能系统参数——功率平滑度长期数学模型以及运用遗传算法求解最优储能系统容量和最大输出功率3个部分。通过对某风电场和光伏电站一年的数据分析,经过仿真计算,为其配置了合理的储能系统。 (3)在运行策略方面,首先对超短期风光功率预测曲线进行傅里叶变换,得到风光功率预测曲线频谱图,依据此频谱图的幅频特性以及设置的对风光功率波动率要求,确定一阶低通滤波截止频率选取范围；然后,在确定的截止频率选取范围内,以一定步长计算每一截止频率下储能系统输出功率曲线,并以储能系统输出功率总量最低和储能系统尽量保持能量守恒为目标,选取其中最优输出功率曲线,即为储能系统计划发电功率曲线；最后,由于风力发电预测和光伏发电预测均不同程度存在误差,对风光发电功率进行实时平滑时,依据储能系统计划发电功率曲线,并运用时间窗的限制得到储能系统实时发电功率。
[Abstract]:With wind power generation , the proportion of photovoltaic power generation in power grid is becoming more and more challenging . As wind power generation and photovoltaic power generation are more and more important in power grid , the uncertainty of the power generation system can be overcome effectively . Based on analyzing the wind - light storage combined power generation system , this paper mainly studies the problem of capacity configuration and operation strategy of energy storage system . The main contents are as follows : ( 1 ) In the aspect of analyzing the wind - light storage and power generation system , firstly , the principle of wind power generation and the principle of photovoltaic power generation are explained in detail , and then the energy storage technology , especially the energy storage technology applied in the power system , is analyzed in detail , and the charge - discharge principle of the energy storage system is introduced . Finally , the characteristics and control requirements of the wind - light storage combined power generation system are emphatically analyzed . ( 2 ) In the aspect of energy storage capacity configuration , firstly , the working principle of the wind - light storage combined power generation system is analyzed , and the traditional control strategy for smoothing wind and light active power fluctuation is introduced . ( 3 ) performing Fourier transformation on the ultra - short - term wind power prediction curve in the aspect of running strategy to obtain a spectrum diagram of the wind power prediction curve , determining a first - order low - pass filtered cut - off frequency selection range according to the amplitude - frequency characteristic of the spectrum map and the set pair of wind power fluctuation rate requirements ;

【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM61

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