Impact of Large-Scale Wind Power Integration on Small Signal Stability Based on Stability Region Boundary

Wenying Liu,Jiangbei Ge,Rundong Ge,Huiyong Li

doi:10.3390/su6117921

Wenying Liu, Jiangbei Ge + Show 2 more

Open Access

https://doi.org/10.3390/su6117921

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Journal: Sustainability	Publication Date: Nov 10, 2014
Citations: 40	License type: CC BY 4.0

Affiliation: North China Electric Power University

Abstract

Up until now, study results on the impact of large-scale wind power integration on small signal stability have often been in conflict. Sometimes, the conclusions are even completely opposite, making people unable to agree on which is right. The reason behind this phenomenon is that most of these studies are based on a certain grid and typical working conditions, so conclusions are reached by comparing changes in oscillation mode, one by one. This study method lacks a broader perspective, and often reflects only a part of the grid conditions. However, the small signal stability region boundary describes the critical operating range of power system small signal stability as a whole, making possible an overall evaluation of the system from a more macro perspective. Thus it is more suitable for analysis of the impact of large-scale wind power integration on small signal stability. Based on the above, using the model of wind farm integration to the single-machine infinite bus power system, this paper studies the impact of wind power integration scale and the coupling strength with synchronous generator on small signal stability through the comparison of the stability region boundaries, thus providing a new method and support for analyzing the impact of wind power integration on small signal stability.

Highlights

With the aggravation of the energy crisis and increasingly prominent environmental problems, renewable energy has become the most effective solution [1]
By using the model of wind farm integration to the single-machine infinite bus power system, this paper studies the impact of wind power integration scale and the coupling strength with synchronous generator on small signal stability through comparison of the stability region boundaries, searching for a new way of thinking about and analyzing the impact of wind power integration on small signal stability
The reason is that most of these studies are based on a certain grid and typical working conditions, which study the impact of different integration scales of wind power on small signal stability by replacing the conventional units with wind turbines

Summary

Introduction

With the aggravation of the energy crisis and increasingly prominent environmental problems, renewable energy has become the most effective solution [1]. Among the various methods of renewable energy generation, wind power generation, seen as the most technologically sophisticated and economically beneficial [2], has been developing rapidly [3,4]. Great attention [6,7] has been paid to large-scale wind power integration. The impact of large-scale wind power integration on power system small signal stability is a high research priority. Bu et al [9] studied the impact of stochastic uncertainty of grid-connected wind generation on probabilistic small signal stability of the power system based on the Gram–Charlier expansion and the probabilistic density function of critical eigenvalues. Soleimanpour and Mohammadi [10] presented a new method based on two-point estimation for probabilistic eigenvalues analysis in power systems containing wind energy, obtaining information on probabilistic system stability with less computation

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Discussion

Conclusion