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Three-phase matrix conversion-based hybrid type power electronic transformer and modulation method thereof

A matrix converter, power electronics technology, applied in the direction of AC network voltage adjustment, electrical components, circuit devices, etc., can solve the problem of unable to suppress the harmonics of the power grid, unable to adjust and stabilize the voltage, etc., to suppress the unbalance of the power grid and harmonious The effect of wave pollution and improvement of various indicators

Pending Publication Date: 2018-02-23
ELECTRIC POWER SCI RES INST OF GUIZHOU POWER GRID CO LTD
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  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem solved by the present invention is to provide a hybrid power electronic transformer based on three-phase matrix transformation and its modulation method, which is used to solve the problems that the traditional transformer cannot suppress the harmonics of the power grid, and cannot adjust and stabilize the voltage

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  • Three-phase matrix conversion-based hybrid type power electronic transformer and modulation method thereof

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Embodiment Construction

[0037] A hybrid power electronic transformer based on three-phase matrix transformation, including a three-phase multi-winding transformer, a filter, and a matrix converter. The primary side of the three-phase multi-winding transformer is connected to a 10kV power grid, and the secondary side of the three-phase multi-winding transformer side a phase contains a 1 winding, b 1 Winding, secondary side b phase contains a 2 winding, b 2 winding, secondary side c phase contains a 3 winding, b 3 winding, the a 1 winding, a 2 winding and a 3 The first ends of the windings are connected to the filter inductance of the filter, a 1 winding, a2 winding and a 3 The tail ends of the windings are all connected to the neutral point of the filter and the inductive load, the b 1 winding, b 2 winding and b 3 The first ends of the windings are connected to the inductive load, b 1 winding, b 2 winding and b 3 The ends of the windings are all connected to a matrix converter, and the m...

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Abstract

The invention discloses a three-phase matrix conversion-based hybrid type power electronic transformer and a modulation method thereof. By adding a matrix converter and a filter to the conventional three-phase multi-winding transformer, a novel three-phase matrix converter-based hybrid type transformer is formed, so that power grid imbalance degree and harmonic pollution are suppressed effectively; meanwhile, by introducing the proper voltage modulation method, a three-phase symmetrical sinusoidal voltage at the input side is modulated into a voltage with appointed frequency and amplitude at the output end according to an instruction signal; meanwhile, a three-phase symmetrical sinusoidal current for modulating the sinusoidal output current into the input frequency under the effect of an output voltage is output synchronously, so as to achieve the purposes of electric energy quality management of voltage sudden drop and fluctuation compensation, voltage adjustment and constant voltageadjustment and the like, thereby greatly improving each electric energy quality index.

Description

technical field [0001] The invention relates to the technical field of application of power electronics in power systems, in particular to a hybrid power electronic transformer based on three-phase matrix transformation and a modulation method thereof. Background technique [0002] Electric energy is the most widely used energy in modern society, and its application degree marks the development level of a country. With the rapid development of science and technology and national economy in our country, people's demand for electric energy has increased significantly. At the same time, the requirements for electric energy quality Power quality is of great significance to the safety of power systems and electrical equipment, economic operation, industrial production and product quality, and maintenance of normal life order. [0003] A power transformer is a static induction appliance that transmits alternating current energy by changing the voltage. In the power system, the pow...

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Application Information

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IPC IPC(8): H02J3/18H02J3/16H02J3/01
CPCH02J3/01H02J3/16H02J3/1857Y02E40/30Y02E40/40
Inventor 刘君曾华荣杨佳鹏陈沛龙杨涛马晓红张迅曾鹏许逵陈仕军刘宇田承越
Owner ELECTRIC POWER SCI RES INST OF GUIZHOU POWER GRID CO LTD
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