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Power control method for asynchronous power generation system of direct current station

A power generation system and power control technology, applied in control systems, control generators, AC network circuits, etc., can solve problems such as incomplete consistency of line parameters, large difference in power distribution of generator sets, and large output power, etc., to achieve The effect of automatic equalization distribution

Active Publication Date: 2021-07-13
WUHAN MARINE ELECTRIC PROPULSION RES INST CHINA SHIPBUILDING IND CORP NO 712 INST
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

The incomplete consistency of the line parameters leads to a large difference in power distribution between the generator sets running in parallel, and there may even be a situation where one generator set has a larger output power while the other generator set works in a light electric mode

Method used

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  • Power control method for asynchronous power generation system of direct current station
  • Power control method for asynchronous power generation system of direct current station
  • Power control method for asynchronous power generation system of direct current station

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Embodiment Construction

[0027] The present invention will be clearly and completely described below in conjunction with the accompanying drawings and embodiments.

[0028] The invention mainly aims at the power balance adjustment problem of the asynchronous power generation system of the direct current power station, and adopts the mode of the direct current current equalizing loop combined with the droop control to control the voltage of the direct current side of the asynchronous generator set, so as to achieve the purpose of power balance adjustment.

[0029] In the present invention, a "diesel rectifier generator set" composed of a diesel engine 4, a three-phase asynchronous generator 3 and a power converter 2 is taken as an example to study a method for power balance control of an asynchronous power generation system in a DC power station.

[0030] Such as figure 1 , figure 2 and image 3 As shown, the present invention discloses a method for controlling the power of a DC power station asynch...

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Abstract

The invention discloses a power control method for an asynchronous power generation system of a direct current station, which adopts a mode of combining a direct current equalizing ring with droop control, and divides a power control process of a generator set into two processes of 'coarse' regulation and 'fine' regulation for power regulation and control. For a direct current station asynchronous power generation system, droop control is based on a relation curve of direct current bus voltage and direct current, a direct current equalizing ring is combined as an additional adjusting link, and the purpose of adjusting the output power is achieved by adjusting the output voltage of the direct current side of a generator set. The power balance control between the parallel operation generator sets of the asynchronous power generation system of the direct-current station is realized.

Description

technical field [0001] The invention relates to a power control method for an asynchronous power generation system of a direct current power station, which is applicable to all application occasions involving the power control of the asynchronous power generation system of a direct current power station, such as onshore direct current microgrids and ship direct current power stations. Background technique [0002] In recent years, the DC power station system, as a new form of ship power grid, has developed rapidly, with breakthroughs in the number of ships installed, ship type and power station capacity. Different from the AC power grid system, the main grid of this system adopts DC power system, without frequency constraints, the generator speed can break through the limit of 3000rpm, the unit can adopt variable speed power generation technology, and integrate power distribution and variable frequency drive into the DC main switchboard , Improve the efficiency and power den...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/46H02P9/30H02J3/36
CPCH02J3/466H02P9/305H02J3/36Y02E60/60
Inventor 陈坤李争光胡传西
Owner WUHAN MARINE ELECTRIC PROPULSION RES INST CHINA SHIPBUILDING IND CORP NO 712 INST
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