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Combined regenerative energy power supply device

Active Publication Date: 2015-05-13
POWER DISPATCHING CONTROL CENT OF GUANGDONG POWER GRID CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Based on this, it is necessary to provide a hybrid renewable energy power supply device for the above-mentioned problems of relatively large line loss and relatively large construction investment due to the remote location of the power plant and the long distance from the load.

Method used

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  • Combined regenerative energy power supply device

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Experimental program
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Effect test

Embodiment 1

[0027] In this embodiment, the wind power is sufficient, the wind turbine operates normally, and its output power is greater than the demanded power of the load, the wind power generation unit supplies power to the regional user loads of the regional architecture system, and the photovoltaic power generation unit is in the power generation or outage state. In this state, due to the instability, discontinuity, and uncontrollability of wind power generation, the large-capacity energy storage elements and wind power generation units in the regional structure of this device supply power to regional user loads at the same time, and the commutation at the end of the large-capacity energy storage elements The inverter works in the state of inverter, and is adjusted by the coordination control unit, so that the power supplied to the regional user load is in a constant voltage 220v alternating current state.

[0028] In this state, the external large power grid system does not supply po...

Embodiment 2

[0031] In the regional framework of this embodiment, the wind power is insufficient to meet the load requirements. In this case, the output power of the photovoltaic power generation unit is monitored. If the power supplied by the photovoltaic power generation unit is greater than the power demanded by the load, the large-capacity energy storage system and photovoltaic power generation The system supplies power to the load at the same time. The converter at the end of the large-capacity energy storage element works in the inverter state, and after adjustment by a coordination control unit, the power supplied to the regional user load is in a constant voltage 220v AC state.

[0032] In this state, the external large power grid system does not supply power to this area structure, the large-capacity energy storage components are running in the discharge state, the photovoltaic power generation unit is in the power generation state, the wind turbine is out of operation, and is disco...

Embodiment 3

[0035] In the regional framework of this embodiment, the power supplied by photovoltaic power generation and wind power generation cannot meet the demand of regional user loads. In this state, the external large power grid system should supply power to this regional structure to meet the load demand of its regional users. At this time, the large-capacity energy storage element operates in a charging state, and is powered by an external power grid. The wind power generation unit and the photovoltaic power generation unit are in a shutdown state, and are disconnected by the wind power generation switching control unit and the photovoltaic power supply switching control unit. The power grid works in the traditional operating state, and supplies power to regional user loads and large-capacity energy storage components at the same time, and the converter works in the rectifier state.

[0036] The operating status of the large-capacity energy storage element, the voltage and curren...

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Abstract

The invention provides a combined regenerative energy power supply device which comprises a wind power generation unit, a photovoltaic power generation unit, a high-capacity energy storage element and a coordination control unit, wherein the high-capacity energy storage element is used for storing electric energy; the coordination control unit is used for enabling the wind power generation unit or the photovoltaic power generation unit to charge the high-capacity energy storage element when the electric quantity produced by the wind power generation unit and the photovoltaic power generation unit is higher than the demand of users in a region, and supplying power to an outside power pool system under the condition that the electric energy is surplus after the charging of the high-capacity energy storage element is finished; and the coordination control unit is also used for cutting off the wind power generation unit and the photovoltaic power generation unit and enabling the outside power pool system to charge the high-capacity energy storage element and supply power to loads of the users in the region when the electric quantity produced by the wind power generation unit and the photovoltaic power generation unit is lower than the demand of the users in the region. According to the invention, line loss and construction investment caused by remote locations of power generation places and long distances from loads can be effectively reduced.

Description

technical field [0001] The invention relates to a distributed power generation system, in particular to a hybrid renewable energy power supply device. Background technique [0002] With people's requirements for energy saving and emission reduction in the new era, a series of new energy technologies such as wind power generation and photovoltaic power generation have been greatly developed. New green energy technology fundamentally solves the traditional power generation methods' dependence on fossil fuels and emission problems. . Of course, due to the short development history of new energy technologies, related technologies are not yet mature enough, and there are still many problems to be solved. [0003] At present, wind power and photovoltaic power generation occupy a large share in today's system energy construction. However, wind power and photovoltaic power generation are too dependent on uncontrollable weather factors, and the geographical location requirements fo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/46
CPCY02E10/56Y02E10/76
Inventor 林少华张维奇李普明周睿何祥针钟金梁亮
Owner POWER DISPATCHING CONTROL CENT OF GUANGDONG POWER GRID CO LTD
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