Electromagnetic Transient (EMT) Simulation Algorithm for Evaluation of Photovoltaic (PV) Generation Systems

2021 IEEE Kansas Power and Energy Conference (KPEC) Pub Date : 2021-04-19 DOI:10.1109/KPEC51835.2021.9446234

Jongchan Choi, S. Debnath

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引用次数: 5

Abstract

Use of inverter-based resources facilitating renewable energy resources such as photovoltaic (PV) generation is increasing rapidly with decreasing costs and reduced emissions associated. To accommodate such rapid growth of inverter-based resources like PV systems, electromagnetic transient (EMT) simulation models of both PV systems and grids are required to analyze the interaction of PVs in the grid (like the post-event analysis). In addition, the EMT simulation would help with the planning of future power grid with a large number of PVs as well as other inverter-based distributed generation systems. In this paper, the EMT simulation models of PV systems and grids are developed based on the differential algebraic equations (DAEs) representing their EMT dynamics. Furthermore, advanced simulation algorithms including numerical stiffness-based hybrid discretization, DAE clustering and aggregation, multi-order integration, and matrix splitting approaches are applied to accelerate the EMT simulation. The proposed algorithm was applied to 125 PV inverters within 52-bus medium-voltage (MV) distribution grid.

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用于光伏发电系统评估的电磁暂态仿真算法

利用基于逆变器的资源促进可再生能源(如光伏发电)的使用，随着成本的降低和排放的减少，正在迅速增加。为了适应光伏系统等基于逆变器的资源的快速增长，需要光伏系统和电网的电磁瞬变(EMT)仿真模型来分析光伏在电网中的相互作用(如事后分析)。此外，EMT仿真将有助于规划未来的大量光伏电网以及其他基于逆变器的分布式发电系统。本文基于代表光伏系统和电网EMT动力学的微分代数方程，建立了光伏系统和电网的EMT仿真模型。此外，采用基于数值刚度的混合离散化、DAE聚类和聚合、多阶积分和矩阵分裂等先进的仿真算法来加速EMT仿真。将该算法应用于52母线中压配电网内的125台光伏逆变器。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2021 IEEE Kansas Power and Energy Conference (KPEC)

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