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首页> 外文会议>2014 IEEE PES Innovative Smart Grid Technologies Conference >Effect of DG and induction motor load power rating on Microgrid transient behavior
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Effect of DG and induction motor load power rating on Microgrid transient behavior

机译：DG和感应电动机负载额定功率对微电网瞬态行为的影响

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摘要

This paper presents an analysis of the effect of power rating on the dynamic characteristics of a Microgrid. The purpose of such analysis is to permit the results of experimentation and simulation to be compared over Microgrids with varying rating. It is shown that nominal power and the parameters of the Distributed Generators (DG) and Induction Motor (IM) loads can be characterized by a nonlinear but tractable relationship. Then, a small signal analysis is used to observe the natural frequencies of the system for nominal power ranging from 1kVA to 1MVA. Results show that the natural frequencies of most DGs and IM loads decrease their damping coefficient as power increases. This has implications on the ability of the Microgrid to recover voltage after a fault triggered islanding and on the speed at which the control loops of the DGs have to be implemented. A non-linear model of the complete system is built in MATLAB/Simulink to observe the combined effect of varying all parameters with power rating. The results show that increase in per unit inertia of machines leads to a slower recovery after a fault.
机译：本文分析了额定功率对微电网动态特性的影响。这种分析的目的是允许在具有不同等级的微电网上比较实验和模拟的结果。结果表明，额定功率以及分布式发电机（DG）和感应电动机（IM）负载的参数可以通过非线性但易于处理的关系来表征。然后，使用小信号分析观察标称功率范围为1kVA至1MVA的系统的固有频率。结果表明，大多数DG和IM负载的固有频率会随着功率的增加而降低其阻尼系数。这影响到微电网在故障触发孤岛后恢复电压的能力，以及必须实施DG的控制回路的速度。在MATLAB / Simulink中建立了完整系统的非线性模型，以观察随额定功率变化所有参数的组合效果。结果表明，机器单位惯性的增加导致故障后恢复速度变慢。

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