Steady‐state model of DFIG‐based wind power plant for load flow analysis

Elbani

2021

EJECE

Self Cite

As they are more efficient in extracting wind energy, variable speed wind power plants (WPPs) are currently replacing the fixed speed WPPs. One possible way to achieve a variable speed WPP is by using a squirrel cage induction generator (SCIG) with full-scale power electronic converter (PEC). In fact, as its cost is relatively lower, the application of SCIG-based variable speed WPP is gaining popularity nowadays. To be able to perform proper analyses (including the load flow analysis) of an electric power system, valid and accurate modeling of the system components is very important. This paper discusses the steady state model of SCIG-based variable speed WPP in power factor control mode for a load flow analysis of an electric power distribution system. The model was developed based on formulas that calculate the turbine mechanical power input and WPP electrical power output. Integration of the proposed model in load flow analysis is also discussed and presented in this paper.

“…It can be shown that a solution to the load flow problem of a power system can be found by solving the following bus or nodal equations [12]:…”

Section: Dslf Problem Formulationmentioning

confidence: 99%

Modeling of SCIG-Based Variable Speed Wind Turbine in Power Factor Control Mode for Load Flow Analysis

Elbani

2021

EJECE

Self Cite

“…In recent years, many investigations have been conducted in the context of modeling and integrating WTGS into steady state load flow analysis of an electric power system. For example, references [3]- [21] propose interesting methods to incorporate WTGS into load flow analysis. In [3]- [5], the induction generator equivalent circuit of the WTGS is converted to a three-node model.…”

Section: Introductionmentioning

confidence: 99%

“…The model in [15], [16] is derived using Kirchhoff and Ohm laws. In [17]- [21], DFIG-based variable speed WTGS models for steady state load flow analysis have been proposed. Equivalent circuits of the doubly fed induction generator (DFIG) have also been used in developing the models in [17]- [21].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Two-port network model of wind turbine generator for three-phase unbalanced distribution system load flow analysis

Purwoharjono

2022

Bulletin EEI

Self Cite

An unbalanced electric power system can occur due to unequal lines and/or loads in each phase of the system. For a system with a high level of unbalance, the assumption that the system is balanced becomes incorrect. For a case like this, the system must be analyzed using three-phase approaches because single-phase analysis techniques can no longer be used to obtain accurate results. Therefore, the development of three-phase models of all components of the electric power system, including the wind turbine generating system (WTGS), is very important so that the system can properly be analyzed and its performance can correctly be evaluated. This paper proposes a method to incorporate WTGS in a three-phase load flow analysis of an unbalanced distribution system. The proposed method is based on the previously published single-phase two-port network model. In this paper, the single-phase two-port network model is modified and extended so that it can be applied to unbalanced systems. The model is then included in the three-phase distribution system load flow (DSLF) analysis. The proposed method is validated using 12-node and 19-node distribution systems.

“…In the context of WPP steady state load flow model, several interesting techniques have been proposed. References [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18], for example, report some of the recent methods. In [7][8][9], multiple-node models of asynchronous generator-based WPP for load flow analysis are proposed.…”

Section: Introductionmentioning

confidence: 99%

Constant Voltage Model of DFIG-Based Variable Speed Wind Turbine for Load Flow Analysis

2021

Energies

Self Cite

At present, the penetration of wind-driven electric generators or wind power plants (WPPs) in electric power systems is getting more and more extensive. To evaluate the steady state performances of such power systems, developing a valid WPP model is therefore necessary. This paper proposes a new method in modeling the most popular type of WPP, i.e., DFIG (doubly fed induction generator)-based WPP, to be used in power system steady state load flow analysis. The proposed model is simple and derived based on the formulas that calculate turbine mechanical power and DFIG power. The main contribution of the paper is that, in contrast to the previous models where the DFIG power factor has been assumed to be constant at unity, the constant voltage model proposed in this paper allows the power factor to vary in order to keep the voltage at the desired value. Another important contribution is that the proposed model can be implemented in both sub-synchronous and super-synchronous conditions (it is to be noted that most of the previous models use two different mathematical models to represent the conditions). The case study is also presented in the present work, and the results of the study confirm the validity of the proposed DFIG model.