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Power grid critical wind curtailment criterion calculation method

A calculation method and grid technology, applied in calculation, wind power generation, electrical components, etc., can solve problems such as limited scope of application, low calculation accuracy, rough calculation, etc.

Pending Publication Date: 2021-01-05
STATE GRID LIAONING ELECTRIC POWER RES INST +2
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  • Summary
  • Abstract
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AI Technical Summary

Problems solved by technology

These methods have made some progress, but there are problems such as excessive simplification of elements and too rough calculation, so the calculation accuracy is not high, and the scope of application is limited. Generally, it is only suitable for wind farms with relatively simple conditions such as terrain.
[0004] At present, there is still no accurate determination method for the critical condition of grid curtailment

Method used

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  • Power grid critical wind curtailment criterion calculation method
  • Power grid critical wind curtailment criterion calculation method
  • Power grid critical wind curtailment criterion calculation method

Examples

Experimental program
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Embodiment Construction

[0060] 1. The largest consumption space for new energy

[0061] For a power system with no internal network constraints, the consumption of new energy only needs to meet the dynamic balance of power generation and consumption and the lower limit of system regulation capacity. The system regulation space between the "load + external power" curve and the lower limit of system regulation capacity is The theoretical maximum consumption space for new energy, such as figure 1 shown.

[0062] 2. Objective function

[0063] In order to accept as much new energy power generation as possible, the new energy on-grid electricity F within the day will be dispatched W As the maximization optimization objective of the model, namely:

[0064]

[0065] In the formula, N w is the total number of new energy power stations, j is the index number of new energy power stations (1≤j≤N w ); j,t is the actual power accepted by the system to new energy site j in period t, MW. Then the new ener...

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Abstract

The invention relates to a calculation method of a power grid critical wind curtailment criterion, which is applied to discrimination of power grid critical wind curtailment conditions and evaluationof objective wind curtailment electric quantity. Information such as the current operation state of a power grid, new energy predicted output and load prediction is fully considered, and when the capacity of a conventional unit of the power grid is reduced to zero, a critical state of wind curtailment is achieved. The objective of the invention is to provide a power grid critical wind curtailmentcriterion so as to realize accurate judgment of the power grid wind curtailment condition and accurately evaluate the power grid wind curtailment electric quantity. A day-ahead scheduling plan of thesystem is formulated according to a new energy admission capability result calculated according to a power grid critical wind curtailment criterion, more new energy such as wind power and photovoltaicenergy can be admitted, and the value of new energy power generation can be brought into full play.

Description

technical field [0001] The invention relates to a calculation method of critical wind curtailment criteria of a power grid, which is applied to the judgment of critical wind curtailment conditions of the power grid and evaluates the objective wind power curtailment. Fully considering the current operating status of the power grid, new energy forecast output, load forecast and other information, when the down-regulated capacity of conventional power units in the power grid is zero, it is a critical state of wind curtailment. The object of the present invention is to provide a critical wind curtailment criterion of the power grid, which can accurately determine the wind curtailment conditions of the power grid, and can accurately evaluate the curtailed wind power of the power grid. According to the calculation of the acceptance capacity of new energy based on the critical wind curtailment criterion of the power grid, the day-ahead scheduling plan of the system will be able to ac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00H02J3/48G06Q10/04G06F17/11
CPCH02J3/00H02J3/48G06Q10/04G06F17/11H02J2203/20H02J2300/28Y02E10/76
Inventor 葛维春葛延峰赵清松苏蠡李胜辉戈阳阳付尧张佳斌张潇桐
Owner STATE GRID LIAONING ELECTRIC POWER RES INST