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对光伏储能系统的控制策略进行优化研究,考虑多模式运行

Fang Liu¹, Zhongliang Li¹, Xiaomeng Wang¹

¹State Grid Henan Electric Power Company Jiaozuo Power Supply Company, Jiaozuo, 454000, China.

|September 16, 2024

概括

一项新的战略通过在电网中断期间选择性地管理其输入和输出来提高光伏储能 (PV-storage) 虚拟同步发电机 (VSGs) 的寿命. 这种方法可将充/放电周期缩短37.82%,提高系统可靠性并降低成本.

科学领域:

电气工程电气工程
可再生能源系统可再生能源系统
控制系统控制系统

背景情况:

太阳能储能 (PV-storage) 虚拟同步发电机 (VSGs) 由于随机负载干扰和电网干扰而面临寿命缩短.
电网变化可能会对储能寿命产生负面影响,并减缓频率恢复过程.
现有的策略可能无法充分解决频率恢复期间的二次振荡,影响系统稳定性.

研究的目的:

为光伏存储VSG提出选择性输入/输出策略,以提高其运行寿命.
通过尽量减少充电和放电周期来降低与储能设备相关的成本.
为了提高频率恢复速度和电网在干扰后的稳定性.

主要方法:

基于干扰大小的选择性VSG输入策略,使用离线模型方程和在线频率变化匹配.
一个动态的VSG退出策略,利用动态频率特征来防止二次振荡.
在NI-PXI + LabVIEW平台上通过计算机模拟和半物理实验进行验证.

主要成果:

实现了VSG的选择性启动,优先考虑物理惯性利用.
与传统策略相比,能源存储寿命得到改善,充电和放电周期减少37.82%.
避免了光伏存储VSG中的二次充电和放电引起的生命损失,从而有助于更快的频率恢复.

结论:

提出的选择性输入/输出策略有效地提高了光伏存储VSG的寿命.
该战略通过减少存储设备退化,显著降低了运营成本.
该方法提高了电网频率稳定性和可靠性,特别是在动态负载条件下.

关键词:

储能储能是指储能过程中的能量.太阳能光伏存储系统的使用.光伏发电是光伏发电的重要组成部分.存储寿命存储寿命虚拟同步发生器 (VSG)

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