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Method and device for grid connection of emergency power supply unit

A technology of emergency power supply and speed regulation device, applied in the direction of single grid parallel feeding arrangement, etc., can solve the problems of inability to meet the grid connection period of the power supply unit, low stability and reliability, and high success rate of grid connection, and achieve fast and stable The effect of automatic grid connection, fast dynamic response, high stability and reliability

Pending Publication Date: 2018-11-20
WOLONG ELECTRIC NANYANG EXPLOSION PROTECTION GRP CO LTD +1
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AI Technical Summary

Problems solved by technology

Commonly used grid-connected methods include no-load start-up grid-connected, instant power supply cut-off grid-connected and grid-connected load resistance, using the above grid-connected methods, the grid-connected cycle is long, the success rate is low, and the stability and reliability are not high , unable to meet the requirements of short grid-connection period, high grid-connection success rate, stable and reliable grid-connection, fast automatic off-grid and automatic grid-connection of power supply units

Method used

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  • Method and device for grid connection of emergency power supply unit
  • Method and device for grid connection of emergency power supply unit
  • Method and device for grid connection of emergency power supply unit

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Embodiment Construction

[0031] The present invention will be further described below in conjunction with the accompanying drawings.

[0032] Such as figure 1 As shown, the present invention provides a grid connection method for an emergency power supply unit, comprising the following steps:

[0033] S01: Set the units to be connected to the grid and run in parallel for initialization;

[0034] S02: Collect the unit information of the units to be connected to the grid and operate in parallel, and generate a unit information difference, and judge the unit information difference;

[0035] S03: According to the difference value of the unit information, control and adjust the speed of the unit item corresponding to the unit information of the units to be connected to the grid and operated in parallel;

[0036] S04: When the information difference of the generating set satisfies the grid-connection threshold condition, perform grid-connection operation.

[0037] Preferably, in the present invention, ste...

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Abstract

The invention provides a method and device for grid connection of an emergency power supply unit, the device and method achieve the follow technical effects by setting a speed regulating device, a control device and a grid connection device: (1) simulating load by using an electromagnetic induction principle to quickly realize grid connection condition and realize fast, reliable, stable and automatic grid connection; (2) using the electromagnetic induction principle to simulate the load and regulate the speed of a generator set, realizing the smooth, stepless and adjustable simulation load control, fast dynamic response speed, no friction, low noise, stable and reliable work and long service life; (3) realizing the fast and stable automatic grid connection, automatic disconnection (splitting) and re-grid connection of the generator set, with short grid connection period, high success rate, high stability and reliability; (4) having the function of fast automatic grid connection and thefunction of real-time torque and speed control.

Description

technical field [0001] The invention relates to the technical field of emergency power supply in electric power systems, in particular to a method and device for connecting an emergency power supply unit to a grid. Background technique [0002] With the development of society and science and technology, power demand and supply are becoming more and more important in the fields of production, life, medical care, service, scientific research, national defense and security. The power quality of the power supply grid seriously affects the stability and reliability of the normal operation of the power system. Especially important factories, enterprises, medical and health care, government agencies, scientific research institutes, national defense and security departments and other units have higher requirements on the power quality of the power supply grid, and even require uninterrupted high-quality power supply. According to the national standard "GB / T30137 Power Quality Voltag...

Claims

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Application Information

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IPC IPC(8): H02J3/42
CPCH02J3/42
Inventor 范红伟张浩胡述静来海丰王成硕张虎高峤刘建波周良刘平顺王天锋逵振雨
Owner WOLONG ELECTRIC NANYANG EXPLOSION PROTECTION GRP CO LTD
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