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Method for battery to participate in wind power fluctuation suppression

A technology of fluctuation suppression and control method, which is applied in wind power generation, electrical components, circuit devices, etc., and can solve problems such as wind abandonment in wind farms

Active Publication Date: 2019-03-19
STATE GRID LIAONING ELECTRIC POWER RES INST +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its purpose is to solve the technical problem of a large number of abandoned wind phenomena in the process of connecting wind farms to the grid

Method used

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  • Method for battery to participate in wind power fluctuation suppression
  • Method for battery to participate in wind power fluctuation suppression
  • Method for battery to participate in wind power fluctuation suppression

Examples

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Embodiment 1

[0054] Step 1. Adopt different control methods for wind farms with different installed capacity, and set the installed capacity of a certain wind farm as P z =500MW, collect the real-time output of the wind farm, and set the current output of the wind farm as P d = 300MW, the output one minute ago was P d1 =305MW, the output ten minutes ago was P d10 = 450MW. Such as figure 1 as shown, figure 1 It is the merging control diagram of the storage battery following the wind power in the present invention. pass figure 1 The fluctuation of wind power output and the capacity of the wind farm are judged, and the output is controlled, so as to invest in battery energy storage.

[0055] Step 2. Carry out battery input or removal calculations for wind farms with different installed capacities to ensure real-time judgments on wind power fluctuations and ensure the safety and reliability of power system power supply. Firstly, conditional modeling of wind farms with different installe...

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Abstract

The invention belongs to the technical field of smart grids, and particularly relates to a method for a battery to participate in wind power fluctuation suppression. The method stabilizes wind power fluctuation based on battery energy storage, and effectively suppresses grid fluctuation caused by wind power instability. The method comprises the steps that different control methods are used for wind farms with different installing capacities; battery input or cutoff calculation is carried out for wind farms with different installing capacities; if s is greater than 1 and less than or equal to 5, whether the battery is put into climbing is judged; Pd-Pd1 / 1<-2Pz / 3 is judged at the time of descending; if s is greater than 5, whether the battery is put into climbing is judged, and then the judgment of Pd-Pd1 / 1<-100 is carried out on descending; and a mathematical model for suppressing wind power fluctuation with the battery in the states of wind power climbing, flatting and descending. According to the invention, battery energy storage is carried out on the wind power of a wind farm; in the case of large wind power output, battery energy storage is carried out to consume partial wind power to ensure the stability of a grid; frequency fluctuation caused by the fact that a traditional unit cannot meet requirements due to the increase of a load is solved; and the power supply reliability and stability of a power system are ensured.

Description

technical field [0001] The invention belongs to the technical field of smart grids, and specifically relates to a method for suppressing wind power fluctuations involving batteries, which is a method based on battery energy storage to stabilize wind power fluctuations, and effectively suppresses power grid fluctuations caused by wind power instability. Background technique [0002] In the current wind power grid-connected power system, due to the uncertainty and volatility of wind power generation, it brings more and more challenges to the safe and reliable operation of the power grid. It is stipulated that in a wind farm less than 30MW, the maximum change within 10 minutes is 20MW, and the maximum change within 1 minute is 6MW; in a power plant with an installed capacity of 30MW-150MW, the maximum change within 1 minute The maximum change rate within 10 minutes does not exceed 2 / 3 of the installed capacity. In wind farms larger than 150MW, the maximum change rate within 1 m...

Claims

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Application Information

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IPC IPC(8): H02J3/24H02J3/32H02J3/38
CPCH02J3/386H02J3/24H02J3/32H02J2203/20Y02E70/30Y02E10/76
Inventor 欧阳强左浩李家珏张涛邵宝珠李胜辉孙峰戈阳阳滕云张强
Owner STATE GRID LIAONING ELECTRIC POWER RES INST
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