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Grid environment energy front end control system and control method

A control system and control method technology, applied in electrical components, circuit devices, emergency protection circuit devices, etc., can solve problems such as grid voltage imbalance, grid phase loss, grid voltage distortion, etc., to ensure closed-loop static-free control, The effect of ensuring power supply quality and improving response speed

Active Publication Date: 2019-07-26
CRRC QINGDAO SIFANG ROLLING STOCK RES INST
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Problems solved by technology

[0002] At present, the DC stabilized power supplies that are common in the market focus on outputting stable DC voltage, and do not have energy management between the grid and the load, especially when the grid environment changes suddenly, such as violent fluctuations in grid voltage and serious distortion of grid voltage. , unbalanced grid voltage, and lack of phase in the grid, the traditional DC stabilized voltage cannot output a stable DC voltage, lacks the function of adapting to the grid environment, and even affects the quality of power supply of the grid

Method used

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  • Grid environment energy front end control system and control method
  • Grid environment energy front end control system and control method

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[0066] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0067] It should be noted that the terms "first" and "second" are used for description purposes only, and are not used to imply relative importance.

[0068] The present invention firstly provides a front-end control system for grid environment energy, which is used for the control of a DC power supply system.

[0069] refer to figure 1 , the main circuit of the DC power supply system includes the mains access terminal (for connecting to the three-phase mains), the three-phase rectification unit connected to the mains access terminal, and the DC output terminal; t...

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Abstract

The invention provides a grid environment energy front end control system and a control method for controlling a DC power system that comprises a mains access terminal, a three-phase rectifying unit connected to the mains access terminal, and a DC output end. The control system comprises a grid voltage collecting unit, a grid current collecting unit and a control board, wherein the control board performs voltage conversion according to the voltage collected by the grid voltage collecting unit, performs current conversion according to the current collected by the grid current collecting unit, performs a third harmonic suppression calculation according to the above values obtained from the conversion to obtain harmonic suppression calculation output, calculates the three-phase modulation wave based on the harmonic suppression calculation output, and calculates a rectification rectifier unit control signal according to the three-phase modulation wave to control the opening and closing ofthe IGBT unit of the DC power supply system. The invention provides an energy front end control system with adaptive grid environment, which can stably adjust the output of the power grid, ensure stable output of the grid energy under normal conditions and fluctuations of the grid environment, and ensure the quality of the power supply.

Description

technical field [0001] The invention relates to the technical field of power grid control, in particular to a front-end control system and control method for power grid environment energy. Background technique [0002] At present, the DC stabilized power supplies that are common in the market focus on outputting stable DC voltage, and do not have energy management between the grid and the load, especially when the grid environment changes suddenly, such as violent fluctuations in grid voltage and serious distortion of grid voltage. , Unbalanced network voltage, and lack of phase in the grid, the traditional DC stabilized voltage cannot output stable DC voltage, lacks the function of adapting to the grid environment, and may even affect the power supply quality of the grid. Contents of the invention [0003] The purpose of the present invention is to provide a grid environment energy front-end control system and control method, which are used to control the stable output of...

Claims

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Application Information

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IPC IPC(8): H02M7/219H02J3/24H02J3/01H02H3/253H02H11/00
CPCH02H3/253H02H11/004H02J3/01H02J3/24H02M7/219Y02E40/40
Inventor 张家明张利军李泽元孙启航闫青亮李学生林飞
Owner CRRC QINGDAO SIFANG ROLLING STOCK RES INST
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