A new T-circuit model of wind turbine generator for power system steady state studies

Abstract

Modeling of wind power plant (WPP) is a crucial issue in power system studies. In this paper, a new model of WPP for steady state (i.e. load flow) studies is proposed. Similar to the previous T-circuit based models, it is also developed based on equivalent T-circuit of the WPP induction generator. However, unlike in the previous models, the mathematical formulation of the new model is shorter and less complicated. Moreover, the derivation of the model in the present work is also much simpler. Only minimal mathematical operations are required in the process. Furthermore, the rotor voltage value of the WPP induction generator is readily available as an output of the proposed new model. This rotor voltage value can be used as a basis to calculate the induction generator slip. Validity of the new method is tested on a representative 9-bus electrical power system installed with WPP. Comparative studies between the proposed method (new model) and other method (previous model) are also presented

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

“…It should be noted that in (16), the voltage at WTGS node or WTGS terminal is also the voltage of SCIG stator, and the power injection at WTGS node is also the power output of WTGS, therefore:…”

“…In [6]- [16], several steady-state mathematical models of fixed speed WTGS for load flow analyses have been developed. In the analyses, the equations of the WTGS models, combined with the existing power system equations (i.e., power system equations without the WTGS), are solved using some non-direct or iterative techniques.…”

“…The model in [14] is derived based on the theory of a two-terminal network (or two-port network). In [15], [16] propose WTGS load flow models, which are obtained based on the Y or T equivalent circuit of the WTGS induction generator. The model in [15], [16] is derived using Kirchhoff and Ohm laws.…”

“…In [15], [16] propose WTGS load flow models, which are obtained based on the Y or T equivalent circuit of the WTGS induction generator. 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.…”

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

“…In the context of modeling WPP for load flow analysis, several methods have been proposed, as reported in [1]- [13]. The researchers in [1]- [8] proposed methods specific for fixed speed WPP, while the methods proposed in [9]- [13] were intended to be used for DFIGbased variable speed WPP. This paper discusses the steady state model of SCIG-based variable speed WPP for distribution system load flow (DSLF) analysis.…”