Distribution network system simulation method considering access of doubly-fed type wind motor

A simulation method, wind turbine technology, applied in the direction of electrical digital data processing, single network parallel feeding arrangement, special data processing applications, etc., can solve problems such as oversimplification, complex models, and lack of

Active Publication Date: 2013-11-27
HUNAN UNIV
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Problems solved by technology

Some of these literatures focus on the dynamic behavior of DFIG itself, and some focus on the dynamic behavior of the connection with the power grid; the former has a complex model, which is difficult to apply in power system simulation calculations, and the latter is too simplified and does not consider DFIG power generation. The overall dynamic characteristics of the system; there is a lack of a model system that can accurately reflect the characteristics of DFIG itself and can be simulated on the grid
However, research on the second question is rarely reported.

Method used

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  • Distribution network system simulation method considering access of doubly-fed type wind motor
  • Distribution network system simulation method considering access of doubly-fed type wind motor
  • Distribution network system simulation method considering access of doubly-fed type wind motor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0107] The generalized comprehensive load model (GSLM) mathematical model (corresponding figure 2 ):

[0108] The comprehensive load model contains four major components: induction motor IM, static load ZIP load, DFIG load, reactive power compensation components (corresponding to figure 1 shown). Now treat DFIG as a constant power source, combine it with the constant power load in the original ZIP model to form a generalized ZIP load, and form a load element together with IM and reactive power compensation, corresponding to figure 2 shown. The following are given respectively figure 2 A mathematical model of the individual components of the Generalized Synthetic Load Model (GSLM).

[0109] 1. All loads are connected to the infinite power supply (the voltage amplitude and frequency are constant). For simplification let the transformer

[0110] Transformer ratio k * T =1, and IM and inter-system reference power conversion ratio K=1.

[0111] The line impedance from t...

example

[0166] P WG IM ,P LOAD >P WG >P IM ,P LOAD WG , at the infinite power outlet bus B 1 A three-phase short-circuit fault is set at B so that 2 The voltage drop range at the busbar is 20%, and its U, P (motor convention), Q (motor convention) samples are collected for parameter identification, and the model parameters are obtained to build a model. The parameter identification results are shown in Table 1-2, and then the simulation and The measured data comparison curve is as follows Figure 4-9 shown, where Figure 1-2 1, 2, 3 and Figure 4-9 The mode of operation is as above respectively P WG IM ,P LOAD >P WG >P IM ,P LOAD WG . Then for the transformed equivalent model namely figure 2 , to identify the constant power source coefficient Sp, when the base value and Sp are known, the formula P pen =P B ×S p Calculate the actual grid-connected capacity P of DFIG pen , predict and estimate the grid-connected capacity of DFIG, and the results are shown in Table 3. ...

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Abstract

The invention discloses a distribution network system simulation method considering the access of a doubly-fed type wind motor. The load (generalized composite load) of a power distribution network is composed of an induction motor load part, a static load Z'I'P' part and a reactive compensation part. The response of the static load Z'I'P' part is preset. According to the distribution network system simulation method considering the access of the doubly-fed type wind motor, the load of the power distribution network is made to be equal to equivalence ZIP conformation, the distribution side structure is simple, and the temporary state simulation research of the distribution network system considering the access of the doubly-fed type wind motor is made to be more convenient and quick.

Description

technical field [0001] The invention belongs to the field of power system load modeling, and relates to a simulation method of a distribution network system considering the access of doubly-fed wind generators. machine modeling and its equivalent description model), the establishment of distribution network side load model (connected to doubly-fed wind turbine) and its equivalent description. Background technique [0002] The increasing human demand for energy has made more development and utilization of clean and renewable new energy a major social issue related to human survival and development. Therefore, new energy power generation has been highly valued and developed rapidly, and the proportion of its installed capacity has increased rapidly , concepts and technologies such as distributed power generation, microgrid, and smart grid have also emerged as the times require. The emergence of a large number of distributed generating sources (Distributed Generating Source, D...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38G06F17/50
CPCY02T10/82
Inventor 李欣然徐振华户龙辉
Owner HUNAN UNIV
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