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Equivalent method for large-scale wind farms based on in-station topology for online safety analysis

A technology for large-scale wind farm and safety analysis, applied in the field of value, it can solve the problem of equivalence of large-scale wind farms, and achieve the effect of clear group relationship, fast processing speed, and easy understanding.

Active Publication Date: 2020-05-19
ELECTRIC POWER SCHEDULING CONTROL CENT OF GUIZHOU POWER GRID CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a large-scale wind farm equivalent method for online security analysis based on the topology in the station in order to solve the problem of how to perform equivalent value for large-scale wind farms when performing online security analysis

Method used

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  • Equivalent method for large-scale wind farms based on in-station topology for online safety analysis
  • Equivalent method for large-scale wind farms based on in-station topology for online safety analysis

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Embodiment Construction

[0052] The method of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0053] Step 1) in the accompanying drawings describes the acquisition of wind turbine actual measurement data, static model information, wind turbine protection parameters, and terminal transformer parameter information provided by an external system, specifically including: wind turbine active power, reactive power, start-up and shutdown status, Real-time wind turbine information such as wind speed and pitch angle; wind power type, unit rated power, active and reactive power upper and lower limits, pitch angle upper and lower limits, wind turbine stability parameters, and topological connection relationship information between wind turbines and feeders, wind turbines and turbines Wind turbine static model parameters such as topological connection relationship of terminal transformer: high / low frequency protection setting and time limit, high / low voltage...

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Abstract

The invention discloses a large wind farm equivalence method for online safety analysis based on station topology, belonging to the technical field of power system operation control. The method comprises the steps of grouping according to the topology connection relation between a unit and a terminal transformer and a feeder, grouping wind turbine units in each group according to start and shutdown states, rated active power, stability parameters, a protection constant value, a type, active power and a pitch angle, obtaining the grouping information comprising unit grouping in a wind field, grouping in a group and unit division in a group, obtaining an equivalent wind power unit corresponding to each group and parameters of rated active power, active power upper and lower limits, active power and reactive power of an equivalent terminal transformer on the above basis, and outputting a grouping result. According to the method, the calculation speed and calculation precision are comprehensively considered, while the speed of simulation calculation is ensured, the simulation accuracy can be effectively improved, and the method is suitable for power grid on-line safety analysis and calculation.

Description

technical field [0001] The invention belongs to the technical field of power system operation control, and in particular relates to a large-scale wind farm equivalent method for on-line safety analysis based on the topology in the station. Background technique [0002] With the rapid development of wind power technology, more and more large-scale wind farms are connected to the power grid. The number of wind turbines assembled in large-scale wind farms can reach hundreds or even thousands, and the total installed capacity can reach hundreds or even gigabits. Watts, its operating characteristics will have a certain impact on the operation of the power system. When conducting online security analysis and calculation of the power grid, it is necessary to consider the impact of large wind farms on the safety and stability characteristics of the power grid. [0003] Electromechanical transient simulation is an important means to study the impact of wind farms on power systems. G...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/00G06F30/20G06F113/06
CPCG06F30/20H02J3/00H02J2203/20Y02E60/00
Inventor 马覃峰查显煜林成曾兴嘉欧阳可凤李峰严明辉刘强徐泰山
Owner ELECTRIC POWER SCHEDULING CONTROL CENT OF GUIZHOU POWER GRID CO LTD