Method and system for controlling generated output of renewable energy source

A technology of power generation and control method, applied in electrical components, circuit devices, circuit layout of AC and DC networks, etc., can solve the problems of small capacity of renewable energy power generation equipment and lack of self-suppressing power fluctuations.

Inactive Publication Date: 2015-05-20
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This kind of renewable energy power generation equipment often does not have the ability to self-suppress power fluctuations due to factors such as small capacity

Method used

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  • Method and system for controlling generated output of renewable energy source
  • Method and system for controlling generated output of renewable energy source
  • Method and system for controlling generated output of renewable energy source

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Embodiment Construction

[0017] In the initial stage of wind power generation and photovoltaic power generation, it is necessary to estimate the power generation capacity, power generation, and fluctuations in power generation, as well as the nature of power generation construction (large-scale power generation bases, distributed power generation), whether there are other stable power generation resources available, large Factors such as the allowable output fluctuation rate when the grid is connected, reasonably plan other types of power generation equipment or energy storage as compensation power generation equipment to provide power support for smooth output control.

[0018] The invention utilizes multiple energy power generation complementary technologies, suppresses sudden changes in the power of renewable energy power generation equipment by compensating power generation equipment, and smooths comprehensive power generation.

[0019] The present invention will be further described below in conju...

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Abstract

The invention provides a method and system for controlling a generated output of a renewable energy source. The method comprises the following steps of: collecting generation powers of all generating plants, gathering the powers of all the generating plants and calculating a power variation rate; judging whether the power variation rate is more than the allowable maximum variation rate; if so, executing a control flow in which the power variation rate is more than the allowable maximum variation rate; or executing a control flow in which the power variation rate is less than or equal to the allowable maximum variation rate. According to the method and the system provided by the invention, the comprehensive output of the power generation of the renewable energy source which cannot inhibit the power fluctuation is smooth.

Description

technical field [0001] The present invention relates to renewable energy, mainly including photovoltaic power generation, wind power generation, etc., and in particular to a method and system for controlling power generation output of renewable energy. Background technique [0002] Under the dual pressure of energy crisis and environmental protection, the use of renewable energy such as wind and light to generate electricity has attracted more and more attention. Due to the unpredictable and random fluctuations of wind speed, the output active power of wind turbines fluctuates with the change of wind speed, and the output power of solar photovoltaics also fluctuates with the change of light. [0003] The location selection of large-scale wind farms and photovoltaic power stations is mainly limited by the distribution of wind resources and light resources. Areas with better wind and light resources are often sparsely populated, with small loads, relatively weak grid structure...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J4/00
Inventor 李毅松王伟周逢权毛建容马红伟
Owner STATE GRID CORP OF CHINA
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