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Device and control method for simulating characteristics of synchronous generator and generation of harmonic voltage

A generator characteristic, synchronous generator technology, applied in output power conversion devices, measuring devices, parts of electrical measuring instruments, etc.

Active Publication Date: 2019-08-02
HEFEI UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] 1. The application of synchronous generators is becoming more and more widespread in the research of distributed power generation systems. The grid simulators that can only simulate grid faults in the past can no longer meet the testing requirements of modern electrical and power electronic equipment. It is necessary to integrate the characteristics of synchronous generators into the grid In the simulator, improve and perfect the function of the power grid simulator;

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  • Device and control method for simulating characteristics of synchronous generator and generation of harmonic voltage
  • Device and control method for simulating characteristics of synchronous generator and generation of harmonic voltage
  • Device and control method for simulating characteristics of synchronous generator and generation of harmonic voltage

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Embodiment Construction

[0061] Use MATLAB / Simulink simulation platform to build the system model.

[0062] see figure 1 , the device for simulating synchronous generator characteristics and harmonic voltage generation in the present invention includes a synchronous generator characteristic realization module 10 , a harmonic generation module 20 , a three-phase series coupled transformer group 30 and a three-phase load 40 .

[0063] The synchronous generator characteristic realization module 10 includes a DC source 1 , a three-phase three-level PWM inverter 1 , a three-phase LC filter 1 , a three-phase Δ / Y type isolation transformer and a three-phase STS static switch 1 . In this embodiment, the voltage of the DC source 1 is 600V, the power of the three-phase three-level PWM inverter 1 is 100KW, the rated voltage is 400V, and the switching frequency is 6KHz. The three-phase LC filter 1 of this embodiment has an inductance of 0.5mH and a capacitance of 90uF. The three-phase Δ / Y type isolation transfo...

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Abstract

The invention discloses a device for simulating characteristics of a synchronous generator and generation of harmonic voltage and a control method thereof. A power grid simulator with the characteristics of the synchronous generator and a harmonic generation function comprises a synchronous generator characteristic implementation module, a harmonic generation module, a three-phase series coupling transformer bank and a three-phase load. Capacitor voltage output by a three-phase LC filter 2 in the harmonic generation module is connected in series with the output voltage of a three-phase LC filter 1 in the synchronous generator characteristic implementation module, for powering the three-phase load jointly. The power grid simulator provided by the invention improves and completes functions of the existing power grid simulator by simulating the characteristics of the synchronous generator and meanwhile emitting harmonics, and thus meets performance tests and research of more electrical and electronic products in the case of abnormal power grid voltage.

Description

technical field [0001] The invention belongs to the field of power quality analysis and control, and relates to a power grid simulator with synchronous generator characteristics and harmonic generation function and its control method, which can not only simulate the characteristics of synchronous generators, but also generate harmonics. In the research of power generation, a power grid test environment with synchronous generator characteristics and harmonic generation function is provided for the system to meet the performance test and research needs of more electrical and power electronic equipment. Background technique [0002] The grid-connected operation of new energy power generation systems can save investment, reduce energy consumption, and improve the reliability and flexibility of the power system. It is an important direction for the development of the power industry in the 21st century. In order to ensure the safety of the system installer and the reliable operati...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/483H02J3/38G01R1/28
CPCG01R1/28H02J3/38H02M7/483
Inventor 张兴朱虹李飞李明杨莹
Owner HEFEI UNIV OF TECH