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Grid-connected generating system

A technology for power generation systems and wind turbines, applied in photovoltaic power generation, wind power generation, AC network load balancing, etc., can solve problems such as power generation power fluctuation, damage to energy storage devices, and increased cost of new energy power generation.

Inactive Publication Date: 2012-09-26
周亮
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, due to the large fluctuations in the power generated by wind power or solar power generation components, it is necessary for the energy storage device to be able to charge or discharge at a faster rate, that is, when the instantaneous power generation of the power generation components is large, it is necessary to Fast charging of the energy storage device; when the instantaneous power generation of the power generation component is small, the energy storage device needs to be discharged quickly, and charging or discharging with a large current can easily cause great damage to the energy storage device and seriously affect the energy storage device. service life, resulting in an increase in the cost of new energy power generation

Method used

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Embodiment 1

[0021] Please refer to figure 1 , figure 1 It is a principle schematic diagram of the first specific implementation mode of the grid-connected power generation system provided by the present invention.

[0022] In the first specific embodiment, the grid-connected power generation system provided by the present invention includes a detection device 11, an electrical storage device 12 and a general control device 13; the detection device 11 is used to detect wind power generators and solar photovoltaic arrays in real time In a specific embodiment, the above-mentioned output power can be directly measured, and can also be indirectly detected by calculation after measuring the output voltage and current; storage or release of electric energy generated by the array; the master control device 13 is used to receive the output power signal, and control the storage device 12 to store or release electric energy; when the sum of the output power of the wind power generator and the outpu...

Embodiment 2

[0029] Please refer to figure 2 , figure 2 It is a schematic diagram of the principle of the second embodiment of the grid-connected power generation system provided by the present invention.

[0030] In the second specific embodiment, the grid-connected power generation system provided by the present invention may also include a wind turbine controller 14; under the control of the general control device 13, the wind turbine controller 14 controls the transmission direction, to control whether the power storage device 12 stores electric energy. Specifically, when the detection device 11 detects that the output power of the fan is greater than the maximum value of the predetermined power fluctuation range, the general control device 13 sends a corresponding signal to the wind controller and controls the action of the wind controller, and the fan controller 14 receives After receiving the signal from the master control device 13, control the wind power generating set to tran...

Embodiment 3

[0032] Please refer to image 3 , image 3 It is a schematic diagram of the principle of the third embodiment of the grid-connected power generation system provided by the present invention.

[0033] In the third specific embodiment, the grid-connected power generation system provided by the present invention may also include a photovoltaic array controller 15; under the control of the master control device 13, the photovoltaic array controller 15 controls the The transmission direction of electric energy controls whether the electric storage device 12 stores electric energy. Specifically, when the detection device 11 detects that the photovoltaic output power is greater than the maximum value of the predetermined power fluctuation range, the general control device 13 sends a corresponding signal to the photovoltaic array controller 15, and controls the action of the photovoltaic array controller 15, and the photovoltaic array After the controller 15 receives the signal from...

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Abstract

The invention relates to the technical field of generating systems, in particular to a grid-connected generating system. The system comprises a wind generating unit, a solar photovoltaic array, a detection device, an electricity storage device and a main control device, wherein the wind generating unit and the solar photovoltaic array are respectively connected into a power grid; when the sum of output power generated by the wind generating unit and the solar photovoltaic array is larger than the output power fluctuation range required by the power grid, the main control device controls the electricity storage device to store electric energy; and when the sum of output power generated by the wind generating unit and the solar photovoltaic array is smaller than the output power fluctuation range required by the power grid, the main control device controls the electricity storage device to discharge electric energy. In the operation of the grid-connected generating system, a supplementary generating unit generates electricity and the electricity storage device is capable of regulating the power transmitted from the generating system to the power grid in real time according to the output power, so that the power transmitted from the generating system to the power grid is relatively stable, power supply stability of the generating system is improved and power supply quality of the power grid is ensured.

Description

technical field [0001] The invention relates to the technical field of power generation systems, in particular to a grid-connected power generation system. Background technique [0002] With the adjustment of the national economic structure and the increase in the proportion of residents' electricity consumption, as well as the increasing scarcity of traditional energy sources, the application of new energy sources such as wind energy and solar energy has become more and more extensive, and the power generation scale of new energy sources has also increased rapidly. [0003] Power generation systems are generally divided into off-grid systems and grid-connected systems. The off-grid system is not associated with the power grid, operates independently, and has a small power generation. It is mainly used for daily electricity consumption or short-term emergency power consumption by residents in areas without electricity, and its application range is relatively limited. After ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02J3/28
CPCY02E10/763Y02E70/30Y02E10/566Y02E10/563Y02E10/766Y02E10/56Y02E10/76
Inventor 周亮
Owner 周亮