Method for stabilizing micro-grid power fluctuation by utilizing controllable load

A power fluctuation and micro-grid technology, applied in the direction of reducing/preventing power fluctuations, data processing applications, instruments, etc., can solve the problems of high energy storage construction costs, limited geographical conditions, large construction costs, etc., to reduce power fluctuations, reduce The effect of power fluctuations and accurate calculation results

Active Publication Date: 2015-07-08
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In terms of solving intermittent energy fluctuations mentioned above, energy storage construction costs are high and operation and maintenance are difficult; other energy complementary methods also need to increase construction costs, and are limited by geographical conditions

Method used

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  • Method for stabilizing micro-grid power fluctuation by utilizing controllable load
  • Method for stabilizing micro-grid power fluctuation by utilizing controllable load
  • Method for stabilizing micro-grid power fluctuation by utilizing controllable load

Examples

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Embodiment Construction

[0051] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0052] This example proposes a method of using controllable loads to stabilize microgrid power fluctuations. It is mainly aimed at the common method of using energy storage to compensate for the power fluctuations of regional microgrids dominated by rooftop photovoltaics. It proposes to use demand response resources to stabilize microgrids. The realization method of power fluctuation, in order to reduce the power fluctuation caused by distributed power generation to the distribution network by using less energy storage or even no energy storage in the case of high penetration rate, and explore the effective use of demand response resources to reduce intermittent energy power fluctuations Way.

[0053] The main idea of ​​this embodiment is to use two levels of day-ahead planning and real-time adjustment. In the two cases...

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Abstract

The invention discloses a method for stabilizing micro-grid power fluctuation by utilizing a controllable load. Aiming at the characteristics of an adjustable load, the slow change of generated power is responded through a day-ahead plan of the adjustable load, and therefore a curve of the controllable load tends to be the same as a day-ahead predicted generating curve. When the method is carried out, an instantaneous abrupt change of the generated power is responded through the real time adjustment of an interruptible load. An effective, practical and scientific micro-grid power fluctuation solution is provided by the invention, the solution can be popularized to solve other power fluctuation problems of distributed intermittent energy, and the solution can be popularized to solve power fluctuation problems of large-scale wind power plants and large-scale photovoltaic power stations, and popularization and application of clean energy is promoted.

Description

technical field [0001] The invention belongs to the technical field of power systems, and in particular relates to a method for using controllable loads to stabilize power fluctuations in microgrids. Background technique [0002] In the development and utilization of renewable energy, photovoltaic and wind power are limited by natural conditions, and their power generation characteristics are intermittent, which often cannot provide controllable, continuous and stable power, exposing some of these intermittent energy sources that are different from traditional power sources ( Such as thermal power, hydropower, nuclear power) power generation characteristics: volatility, incomplete predictability, low controllability. According to the current actual measurement, the maximum power change rate of photovoltaic power plants can reach 70% of the installed capacity per minute. The violent fluctuations caused by these intermittent energy sources, once the penetration rate (ratio of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/24G06Q10/04G06Q50/06
Inventor 李卫良杨永标黄堃陈璐黄莉宋杰辛建波范瑞祥
Owner STATE GRID CORP OF CHINA
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