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New energy power generation direct-current grid-connected system and control method thereof

A control method and new energy technology, which are applied in wind power generation, parallel operation of DC power supplies, and DC network circuit devices, etc., can solve problems such as the inability of distribution network to meet the needs of electric vehicle power load operation.

Inactive Publication Date: 2021-01-22
安徽怡咖电气科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional distribution network cannot meet the needs of electric vehicle power load operation

Method used

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  • New energy power generation direct-current grid-connected system and control method thereof
  • New energy power generation direct-current grid-connected system and control method thereof
  • New energy power generation direct-current grid-connected system and control method thereof

Examples

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Embodiment

[0045] Such as figure 1 As shown, this embodiment provides a DC grid-connected system for new energy power generation, including a distributed power supply, an interface converter, an energy storage device, and a grid. The distributed power supply is composed of a wind power station, a fuel cell, and an electrolytic hydrogen production composition;

[0046] The input end of the electrolytic hydrogen production is electrically connected to the DC bus through the DC / DC converter, the output end of the electrolytic hydrogen production is connected to the input end of the fuel cell, and the fuel cell is connected to the DC bus through the DC / DC converter , forming a closed loop;

[0047] The distributed power supply is connected in parallel to the DC bus through the DC / DC converter, the DC bus is electrically connected to the AC bus through the DC / AC interface converter, the AC bus is electrically connected to the grid power supply, and the AC bus also features an AC load,

[0...

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Abstract

The invention discloses a new energy power generation direct-current grid-connected system, which comprises distributed power supplies, an interface converter, an energy storage device and a power grid, wherein the distributed power supplies consist of a wind power station, a fuel cell and an electrolytic hydrogen production device; the input end of the electrolytic hydrogen production device is electrically connected with a direct-current bus through a DC / DC converter, the output end of the electrolytic hydrogen production device is connected with the input end of the fuel cell, and the fuelcell and the direct-current bus form a closed loop through the DC / DC converter; and the interface converter, the energy storage device and a DC / AC power transformation device report a modulation function through a PI controller with a wireless communication mode, so as to realize voltage and current control of power consumption quota allocation between distributed power supplies, realize grid-connected or off-grid operation through electrical connection with a power grid by means of a short-circuit switch, and the load capacities of the direct-current load and the alternating-current load areallocated according to power utilization requirements. According to the new energy power generation direct-current grid-connected system, the capacity expansion capability of the distributed new energy power generation DC grid-connected system is improved, and the operation reliability of a traditional power distribution network is enhanced.

Description

technical field [0001] The invention belongs to the technical field of electric power supply control, and in particular relates to a new energy power generation DC grid-connected system and a control method thereof. Background technique [0002] With the rapid development of distributed power generation technology around the world, its increasing penetration rate and access to more types of new energy have brought various impacts on the current power grid. Distributed power generation technology can be divided into renewable energy generation such as photovoltaic, wind energy, small hydropower, biomass, geothermal, ocean waves and tides, clean alternative energy power generation technologies such as fuel cells and micro turbines, and traditional diesel generators based on Power generation technology for rotating machinery. Due to the advantages of distributed generation technology such as cleanliness and flexible construction, coupled with the increasing demand for electric...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J1/10H02J3/32H02J3/38
CPCH02J1/10H02J3/32H02J3/381H02J3/322H02J3/388H02J2300/24H02J2300/28H02J2300/30H02J2310/48Y02E10/56Y02E10/76Y02E60/36Y02E70/30
Inventor 陈昊陈滋健刘宏飞
Owner 安徽怡咖电气科技有限公司
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