Voltage stability assessment for wind farms integration in electricity grids with and without consideration of voltage dependent loads

Toma, Radu; Gavrilaș, Mihai

doi:10.1109/icepe.2016.7781440

Cited by 7 publications

(7 citation statements)

References 4 publications

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“…Thesis [17] proposes a curve based voltage stability assessment method, and implements a visualization framework for assessing voltage stability margins. Thesis [18] studies the effects on voltage stability of the integration of a wind farm into the electricity grid. With the large capacity of wind power installed in modern power system, traditional voltage state assessment methods are hard to apply, and using these methods, it is especially hard to deal with the randomness and correlation of wind power.…”

Section: Literature Reviewmentioning

confidence: 99%

A Vine-Copula Based Voltage State Assessment with Wind Power Integration

et al. 2019

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With the increasing rate of wind power installed capacity, voltage state assessment with large-scale wind power integration is of great significance. In this paper, a vine-copula based voltage state assessment method with large-scale wind power integration is proposed. Firstly, the nonparametric kernel density estimation is used to fit the wind speed distribution, and vine-copula is used to construct the wind speed joint distribution model of multiple regions. In order to obtain voltage distribution characteristics, probabilistic load flow based on the semi-invariant method and wind speed independent transformation based on the Rosenblatt transformation are described. On this basis, a voltage state assessment index is established for the more comprehensive evaluation of voltage characteristics, and a voltage state assessment procedure is proposed. Taking actual wind speed as an example, the case study of the IEEE 24-node power system and the east Inner Mongolia power system for voltage state assessment with large-scale wind power integration are studied. The simulation results verify the effectiveness of the proposed voltage state assessment method.

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Section: Literature Reviewmentioning

confidence: 99%

A Vine-Copula Based Voltage State Assessment with Wind Power Integration

et al. 2019

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“…Solving nonlinear Equation (10) we can obtain V t,lim and f (V t ) (see (14)); continue to check m adjustable sources if there is any source violated. If there is no source violated, M(Q t , P t ) is located on the stability limit; otherwise, we recalculate Step 2.…”

Section: Determining Points On Stability Boundarymentioning

confidence: 99%

“…Among them, P-V and Q-V curves are still widely used both in the research and in industry [7,[10][11][12][13][14][15]; with these curves, the maximum active and reactive power at a system load bus can be determined when the voltage at that bus reaches the voltage collapse boundary. In particular, a P-V curve gives the relationship between the real power load and bus voltage.…”

Section: Introductionmentioning

confidence: 99%

A Methodology for Determining Permissible Operating Region of Power Systems According to Conditions of Static Stability Limit

Ngo

et al. 2017

Energies

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Abstract:For power systems with long-distance ultra-high-voltage (UHV) transmission lines, power transmission limits are often determined by static stability limits. Therefore, the assessment of stability and finding solutions to improve the stability reserve are essential for the operation of the system. This article presents an analytical approach to construct limit characteristics according to static stability conditions on a power plane. Based on the approach proposed, a program is developed and tested on a system with long-distance UHV transmission lines, showing a good performance.

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“…Many studies have shown the importance of such detailed modeling in improving the reliability of simulation. Researchers have investigated the voltage stability in distribution networks integrating wind farms, using different load model representations. Khlifi has shown that voltage instability occurred only due to the presence of the induction motor load.…”

Section: Introductionmentioning

confidence: 99%

“…In Saïdi et al, the authors have used wind generation as a bifurcation parameter for determining the stability margin, based on static and dynamic continuation power flow (CPF) techniques. The study in Toma et al has demonstrated that voltage dependency of load has increased the saddle‐node bifurcation point, but with the cost of much lower voltage values at system buses. In all the above studies, most of wind power system voltage stability studies carried out by using bifurcation theory are single‐parameter bifurcation analysis.…”

Section: Introductionmentioning

confidence: 99%

Analysis and study of two‐dimensional parameter bifurcation of wind power farms and composite loads

Saidi

Slimene

Khlifi³

et al. 2019

Wind Energy

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This study focuses on the stability of power system based on codimension‐two bifurcation theory. In this paper, we investigate the impact of load modeling on permissible wind power generation margins in distribution networks. The study considers codimension‐two bifurcations of equilibria and limit cycles in wind power systems depending on varying two parameters simultaneously. The principle parameter is the wind power generation, and the other parameter depends on the different types of loads. The types of loads are ZIP, exponential recovery, dynamic induction loads, and composite load models. To study the effects of the induction motor loads, the proportion of the static component in the motor load is changed and assessed with respect to their mechanical loads. Wind generation margin boundaries are traced, and saddle‐node, Hopf, and limit‐induced bifurcation branches are obtained, delimiting the stable and unstable operating regions in the parameter space. The analysis presented in this paper can pave the way for determining methods for improving and monitoring these margins with consideration to the system parameters and load composition.

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Voltage stability assessment for wind farms integration in electricity grids with and without consideration of voltage dependent loads

Cited by 7 publications

References 4 publications

A Vine-Copula Based Voltage State Assessment with Wind Power Integration

A Vine-Copula Based Voltage State Assessment with Wind Power Integration

A Methodology for Determining Permissible Operating Region of Power Systems According to Conditions of Static Stability Limit

Analysis and study of two‐dimensional parameter bifurcation of wind power farms and composite loads

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