Development of the Novel Real-Time Static Voltage Stability Enhancement Control Strategy to Improve Voltage Stability of Power Systems with Wind Power Generation Systems

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基本資料

Project title

Code/計畫編號

MOST107-2218-E155-010

Translated Name/計畫中文名

發展新型即時靜態電壓穩定度強化控制策略以提升含風力發電系統之電力系統電壓穩定度

Project Coordinator/計畫主持人

Jian-Hong Liu

Funding Organization/主管機關

National Science and Technology Council

Department/Unit

YZU Electrical Engineering

Website

https://www.grb.gov.tw/search/planDetail?id=12666660

Year

2018

Start date/計畫起

01-08-2018

Expected Completion/計畫迄

31-07-2019

Bugetid/研究經費

770千元

ResearchField/研究領域

電子電機工程

由於風能的高度間歇性出力與風力發電吸收虛功率的特性，電壓穩定度問題普遍存在於風力發電併網的電力系統中，因此，電網必須適當地強化負載裕度，確保電網能有足夠承受偶發事故的容忍力，傳統的負載裕度強化控制法皆是使用基於潮流模型的電壓穩定度評估法的負載裕度靈敏度，因其計算效能極度受限於系統的節點數，不適合應用於即時環境中。為了克服傳統強化控制的缺點，本研究擬採用基於量測資訊的負載裕度評估法，將其延伸至負載裕度靈敏度的計算，藉此建構一新穎的即時靜態電壓穩定度強化控制策略。提出的負載裕度強化控制可根據負載裕度靈敏度，適當地調整虛功元件的無效功率輸出，使負載裕度能滿足要求的安全負載裕度門檻值，另外，本研究也將結合負載裕度靈敏度於Gram Charlier 機率密度函數擴展式之中，藉此求取風能隨機波動下的解析式負載裕度機率密度函數，該函數可透過累加大於安全負載裕度門檻值之機率，計算當前電網運轉的可靠度，負載強化控制便可適當地調整電網的負載裕度，滿足要求的安全運轉可靠度門檻值，藉此維持電網的安全運轉。最後本研究將以典型的IEEE 測試系統以及台電系統，驗證所提出的強化控制策略的正確性與可行性。 Due to the intermittent nature of wind energy and the inherent characteristic of absorbing reactive power in wind power generators, the problem regarding to voltage stability security commonly exists in power systems containing wind power generation systems. In order to ensure the sufficient tolerance of bearing contingencies, the load margin of power grids is necessary to be enhanced appropriately. Since the traditional load margin enhancement control strategy comes from the load margin sensitivity derived from the model-based voltage stability assessment, its computational performance is strictly restricted by the amount of nodes. Thus, it is not applicable to the real-time environment. In our study, we will utilize the measurement-based load margin prediction to overcome the computational difficulties in the traditional approach. Our aim is to extend the measurement-based approach to derive the corresponding load margin sensitivity, and then the novel real-time static voltage stability enhancement control strategy is proposed. According to the load margin sensitivity, the proposed enhancement control is to adjust the reactive power output from those installed reactive power devices in order to satisfy the required safe threshold load margin. On the other hand, the load margin sensitivity will be integrated to the Gram-Charlier probabilistic expansion series to find an analytical probability density function of the load margin under stochastic wind power fluctuations. Such analytical function can be used to calculate the reliability of the current operation condition through accumulating the probability the range of which is greater than the safe threshold load margin. Therefore, the load margin enhancement control can be performed appropriately to meet the required safe threshold reliability for maintaining the safety operation of power grids. In the end, several IEEE test systems and the Taipower test system will be adopted in our numerical simulation to verify the correctness and feasibility of the proposed enhancement control strategy.

Keyword(s)

風力發電系統
雙饋式感應發電機
定速型感應發電機
電壓穩定度評估
負載裕度靈敏度
負載裕度強化控制
戴維寧等效電路
負載裕度機率分析
解析式機率密度函數
Wind Power Generation System
Doubly-Fed Induction Generator
Fixed-Speed Induction Generator
Voltage Stability Assessment
Load Margin Sensitivity
Load Margin Enhancement Control
Thevenin Equivalent Circuit
Probabilistic Load Margin Analysis
Analytical Probabilistic Density Function

DSpace CRIS

Development of the Novel Real-Time Static Voltage Stability Enhancement Control Strategy to Improve Voltage Stability of Power Systems with Wind Power Generation Systems

基本資料

Description