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A power control method and system for photovoltaic power plants

A power control and photovoltaic power station technology, applied in photovoltaic power stations, photovoltaic power generation, photovoltaic modules, etc., can solve the problem that photovoltaic power station control response speed and accuracy cannot be taken into account at the same time, achieve high engineering practical value, avoid errors and dead zones, The effect of rapid control

Inactive Publication Date: 2019-02-01
XUJI GRP +1
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a power control method and system for photovoltaic power plants, which is used to solve the problem that the control response speed and accuracy in photovoltaic power plants cannot be taken into account at the same time, and to ensure power quality

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  • A power control method and system for photovoltaic power plants
  • A power control method and system for photovoltaic power plants

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Embodiment Construction

[0019] Below in conjunction with accompanying drawing, the present invention will be further described.

[0020] An embodiment of a power regulation method for a photovoltaic power station

[0021] In a photovoltaic power station, the monitoring system monitors and controls distributed power nodes through communication equipment, where the communication equipment includes a communication host and a protocol conversion device. Each protocol conversion device corresponds to a distributed power node or a group of distributed power nodes. The distributed power node is an inverter or a reactive power compensator SVG. Such as figure 1 Shown is the situation where each protocol conversion device corresponds to a distributed power node, in which the protocol conversion device 1 corresponds to the distributed power node 1, and the control message issued by the monitoring system to the distributed power node 1 passes through the communication host and the protocol conversion device 1...

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Abstract

The invention relates to a power regulation-control method and system for a photovoltaic power station, and belongs to the field of photovoltaic power generation. The regulation and control method comprises that the absolute value of a difference between target power and practical power is compared with a set value; when the absolute value is greater than the set value, power regulation and control data of each distributed power node is calculated by taking all the distributed power nodes as objects, and then the power regulation and control data is sent to each distributed power node correspondingly; and when the absolute value is lower than or equivalent to the set value, power regulation and control data of each distributed power node is calculated by taking part of the distributed power nodes as objects, and then the power regulation and control data is sent to each of the part of the distributed power nodes correspondingly. According to the power regulation-control method and system of the invention, requirements for response speed and precision of power regulation and control of the photovoltaic power station are both taken into consideration, fluctuation impact on the public power grid is reduced, and the engineering practical value is higher.

Description

technical field [0001] The invention relates to a power regulation method and system for a photovoltaic power station, belonging to the field of photovoltaic power generation. Background technique [0002] In recent years, the tightening of energy supply and environmental damage have become major global problems, and countries around the world are actively taking measures to solve related problems. Green and environmentally friendly energy is widely used, and photovoltaic power generation is favored for its unique advantages. In recent years, the photovoltaic power generation industry has continued to develop healthily and rapidly. In 2015, the installed capacity of photovoltaic power generation in my country was about 15GWp. By the end of 2015, the cumulative installed capacity of photovoltaic power generation was about 43GWp, and it is expected to exceed 100GWp by the end of 2020. The inverter layout is scattered, especially the number of string inverters is large. If the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/00H02S10/00
CPCH02J3/00H02S10/00Y02E10/50
Inventor 李继川霍富强陈娜娜谢红伟王留送董永超王景丹葛琪焦东东宣锐峰苏战辉贺称心
Owner XUJI GRP