The impact of X/R ratio on voltage stability in a distribution network penetrated by wind farms

2016 ◽  
Author(s):  
Seyed Morteza Alizadeh ◽  
Cagil Ozansoy ◽  
Tansu Alpcan
Keyword(s):  
Voltage Stability ◽  
Distribution Network ◽  
Wind Farms ◽  
R Ratio ◽  
The Impact

Impact of Large-Scale Integrated Wind Farms on the Voltage Stability of Regional Power System

2013 ◽  
Vol 724-725 ◽  
pp. 659-663 ◽  
Author(s):  
Qian He ◽  
Zhen Yu Xu ◽  
Zhen Qiao ◽  
Xu Zhang
Keyword(s):  
Large Scale ◽  
Voltage Stability ◽  
Power Grid ◽  
Wind Farms ◽  
Regional Power ◽  
Variable Speed Wind Turbine ◽  
Transient Voltage Stability ◽  
Transient Voltage ◽  
Doubly Fed ◽  
The Impact

In this paper, a variable speed wind turbine model based on doubly-fed induction generator (DFIG) and a section of a practical power grid model to be studied are implemented in DIgSILENT / PowerFactory. The static voltage stability and the transient voltage stability of the regional power grid with high wind power penetration will be studied. Moreover, this paper will focus on the impact of static var compensator (SVC) on both steady state voltage stability and transient voltage stability.

scholarly journals Power System Voltage Stability analysis with Renewable power Integration

2021 ◽  
Vol 10 (6) ◽  
pp. 114-117
Author(s):  
Sinan M ◽  
Sivakumar W M ◽  
Anguraja R
Keyword(s):  
Power System ◽  
Voltage Stability ◽  
Wind Farm ◽  
Stability Margin ◽  
Wind Farms ◽  
Wind Speeds ◽  
Voltage Instability ◽  
Renewable Power ◽  
Power Difference ◽  
The Impact

The purpose of this research is to find the loading limit of a power system before hitting voltage instability and to assess the margin to voltage instability of a system consisting of a wind farm. An index called Bus Apparent Power Difference Criterion (BSDC) is used to find maximum loadable point. The measure depends on the way that in the region of the voltage collapse no extra apparent power can be delivered to the affected bus. The analysis is performed combination of wind power injection at different wind speeds and line outages in the network. In the feasibility and siting studies of wind farms the steady state analysis with network contingencies give the utility or the developer a sense of network condition upon the injection of power in the network. However, the extent of voltage stability impacted due to load growth in the system is not assessed. The research paper makes way to assess the impact on voltage stability margin with obtaining the maximum loadable point of the system and assessing the best suited bus to integrate a wind farm into the system.

scholarly journals Energy Optimization for Distributed Energy Resources Scheduling with Enhancements in Voltage Stability Margin

2016 ◽  
Vol 2016 ◽  
pp. 1-20
Author(s):  
Hugo Morais ◽  
Tiago Sousa ◽  
Angel Perez ◽  
Hjörtur Jóhannsson ◽  
Zita Vale
Keyword(s):  
Voltage Stability ◽  
Distribution Network ◽  
Stability Margin ◽  
Stability Index ◽  
Energy Resources ◽  
System Stability ◽  
Distributed Energy Resources ◽  
Distributed Energy ◽  
Electric Networks ◽  
The Impact

The need for developing new methodologies in order to improve power system stability has increased due to the recent growth of distributed energy resources. In this paper, the inclusion of a voltage stability index in distributed energy resources scheduling is proposed. Two techniques were used to evaluate the resulting multiobjective optimization problem: the sum-weighted Pareto front and an adapted goal programming methodology. With this new methodology, the system operators can consider both the costs and voltage stability. Priority can be assigned to one objective function according to the operating scenario. Additionally, it is possible to evaluate the impact of the distributed generation and the electric vehicles in the management of voltage stability in the future electric networks. One detailed case study considering a distribution network with high penetration of distributed energy resources is presented to analyse the proposed methodology. Additionally, the methodology is tested in a real distribution network.

The Impact on the Voltage Fluctuation of Wind Power Integrated Separately in Chongqing Distribution Network

2013 ◽  
Vol 385-386 ◽  
pp. 1053-1058
Author(s):  
Hui Peng ◽  
Sheng Fang Li ◽  
Ya Jun Li ◽  
Yuan Yuan Li ◽  
Jian Ding ◽  
...  
Keyword(s):  
Wind Power ◽  
Large Scale ◽  
Wind Farm ◽  
Distribution Network ◽  
Wind Farms ◽  
Distribution Networks ◽  
National Standards ◽  
Voltage Fluctuation ◽  
Access Mode ◽  
The Impact

Recently, the development of Chinese wind power generation has formally entered the strategic transformation stage with the combination of large-scale integrated exploitation and distributed access exploitation. It is suitable to adopt distribution access mode due to the characteristics of Chongqings planning wind farm including small generation capacity and distributed location. However, considering that most of planning wind farms are located in the mountain area of northeast and southeast Chongqing with the large-scale geographic area and small load request and the distribution networks are relatively weak, there may be remarkable effect on quality of electric energy even though the distribution access mode is adopted. In this paper, aiming at the voltage fluctuation of access point, the relationships among variables affecting the voltage fluctuation is analyzed, then taking two planning wind farms in northeast and southeast Chongqing respectively as examples, the effects of voltage fluctuation caused by different access points are calculated and analyzed in order to get the allowed maximum capacity of wind farms fitting national standards. In the end, the proposals relevant to the development of wind power and contribution of distribution network are submitted according to the case results.

scholarly journals Voltage stability in distribution network

2020 ◽  
Author(s):  
◽  
Sboniso Brutus Masikana
Keyword(s):  
Voltage Stability ◽  
Reactive Power ◽  
Distribution Network ◽  
Research Work ◽  
Electric Energy ◽  
Load Flow ◽  
Voltage Profile ◽  
Voltage Instability ◽  
Bus Voltage ◽  
The Impact

Voltage stability studies and to maintain the flat voltage profile is quite important in order to maintain the healthy operation of electric power network as well as to provide the quality and cheap electric energy to the modern power users. Further with the advancement of power electronics technologies and its application to design flexible alternating current transmission devices (FACTS) have made it easier to alleviate the voltage stability problem in a quicker and cheaper way in the modern DNs. Therefore, this research work shows an attempt to investigate and solve the problem of voltage instability in the distribution network (DN) with the help of FACTS. All buses and lines are calculated in terms of voltage stability index (VSI) and to identify the optimal location of FACTS. The bus or line with minimum voltage profile in terms of VSI are more sensitive to the voltage collapse and it may further lead to blackouts. Hence, the FACTS are permanently installed at the weakest point to enhance voltage profile and improve the voltage stability in the DN. The present study is tested on standard IEEE-15 bus DN and application results are shown to verify the feasibility of the present studies for DN. The beauty and future promise of UPFC in power quality improvement was authenticated on the IEEE-15 bus DN carried out using MATLAB software tool, five different scenarios were considered by increasing the load up to 40% at an interval of 10% from its nominal operating load. With the aim of determining the impact of UPFC on bus voltage and system losses, the load flow analysis was contributed on each scenario with and without UPFC placement in the DN. After UPFC placement there was a significant enhancement of voltages of all busses as well as weakest bus voltage jump from 0.5750 to 0.9750 p.u. and shifting that bus as well as system from voltage instability to stable zone. The active and reactive power loses were decrease by 9.83% and 27.27% that fulfil the beauty of the UPFC installation in the DNs as well as it promise to mitigate the voltage instability problem of the modern DNs

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