含虚拟同步机光伏并网电力系统小干扰稳定约束最优潮流算法
SMALL DISTURBANCE STABILITY CONSTRAINED OPTIMAL POWER FLOW ALGORITHM OF PHOTOVOLTAIC GRID-CONNECTED POWER SYSTEMS WITH VIRTUAL SYNCHRONOUS GENERATOR
李生虎 1宫俊伟 1夏伟健 1姚家伟1
作者信息
- 1. 合肥工业大学电气与自动化工程学院,合肥 230009;新能源利用与节能安徽省重点实验室,合肥 230009
- 折叠
摘要
为改善含虚拟同步机(VSG)光伏(PV)并网电力系统小干扰稳定性,根据特征值及其阻尼比,筛选电力系统弱阻尼振荡模式和邻近失稳模式.建立上述危险模式对PV-VSG控制参数灵敏度,进而以潮流雅克比矩阵为桥梁,提出危险模式对同步发电机(SG)出力灵敏度的解析表达.以控制参数和SG出力调整量最小为目标函数,以危险模式阈值为约束,提出PV-VSG并网电力系统稳定约束最优潮流(SC-OPF)算法.算例结果分析了对危险模式的优化控制效果,验证了所提算法的有效性.
Abstract
To improve the stability of the photovoltaic(PV)grid-connected power systems with virtual synchronous generator(VSG),and the weakly damped modes and the marginal stable modes are screened according to the eigenvalues and the damping ratios.The sensitivities of these critical modes with respect to the control parameters of the PV-SVG are derived.With the help of the Jacobian matrix of the power flow equations,the sensitivities of the critical modes with respect to the active power of the synchronous generator(SG)is proposed.With the objective function of the minimum adjustment to the control parameters and the SGs'active power,and the constraints of the criterion of the critical modes,the stability constrained optimal power flow(SC-OPF)algorithm for the PV-VSG integrated power systems is proposed.The numerical results confirm the effect of the optimized control on the critical modes,and verify the effectiveness of the proposed algorithm.
关键词
光伏发电/优化/同步发电机/虚拟同步机/小干扰稳定性/特征值灵敏度Key words
photovoltaic power/optimization/synchronous generators/virtual synchronous generator(VSG)/small disturbance stability/eigenvalue sensitivity引用本文复制引用
出版年
2024
NETL
NSTL
万方数据