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In-loop test system and method of impedance hardware of double-fed blower fan

A double-fed fan and test system technology, applied in the field of electric power, can solve problems such as complicated operation, difficult implementation, and no consideration of filtering branches, etc., and achieve the effects of simple and flexible operation, accurate test results, and improved guiding significance

Active Publication Date: 2016-12-07
NORTH CHINA ELECTRICAL POWER RES INST +3
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Problems solved by technology

First, the theoretical calculation method is used to calculate the impedance of DFIG, which is only applicable to the classic DFIG model at present, without considering the actual filtering branches and other links, and the models of different manufacturers are quite different
Second, the time-domain simulation method is used to measure the impedance of the digital model of the double-fed fan. Since there are certain differences between the digital simulation and the actual engineering, the impedance measured by this method has limited guiding significance for the actual engineering.
Third, test the impedance of the double-fed fan for the physical system built in the laboratory. This method is difficult to implement, and the entire system including the double-fed fan needs to be built, and the operation is complicated.

Method used

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  • In-loop test system and method of impedance hardware of double-fed blower fan

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Embodiment Construction

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.

[0031] The stability of power systems including DFIGs is a hotspot in academic and engineering research. Therefore, it is of great significance to calculate or measure the impedance of DFIGs. In order to realize the hardware-in-the-loop test of the impedance of the double-fed fan flexibly and conveniently, and approach the engineering practice, so that the test results are more accurate, the embodiment of the present invention provides a hardware-in-the-loop test system of the impedance of the double-fed fan, such as figure 1 As shown, the DFIG impedance hardware-in-t...

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Abstract

The invention discloses an in-loop test system and method of impedance hardware of a double-fed blower fan. The system comprises an electric and electronic real-time simulation platform; the electric and electronic real-time simulation platform establishes a real-time digital simulation model including an electrical network, a small signal voltage source for impedance test, a shafting of a wind turbine generator system, a motor and a main circuit, a protective circuit and filtering branches of a current transformer; the real-time digital simulation model is made real-time and then downloaded into a simulator of the electric and electronic real-time simulation platform; and a controller of the to-be-tested double-fed blower fan is connected with the real-time digital simulation model via an input and output interface of the simulator. According to the invention, in-loop test for the impedance hardware of the double-fed blower fan can be realized flexibly and simply, engineering practicality is approached, and a test result is more accurate.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to a hardware-in-the-loop testing system and method for the impedance of a double-fed fan. Background technique [0002] Impedance is a fundamental characteristic of electrical systems. At present, impedance-based system stability analysis is a hotspot in academic research, and it has been used to solve the problem of system stability analysis including power electronic equipment. Therefore, it is of great significance to calculate or measure the impedance of each electrical equipment, and the calculation or measurement of the impedance of the double-fed fan is very important for the stability analysis of the power system including the double-fed fan. [0003] At present, there are several problems in the calculation or measurement of the impedance of double-fed fan. First, the theoretical calculation method is used to calculate the impedance of DFIG, which is currently on...

Claims

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Application Information

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IPC IPC(8): G01R27/02G01R27/08
CPCG01R27/02G01R27/08
Inventor 刘辉李蕴红江浩宁文元李雨崔正湃吴林林王靖然
Owner NORTH CHINA ELECTRICAL POWER RES INST
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