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Distribution network power supply reliability evaluation method considering wind power

A reliability and distribution network technology, applied in wind power generation, electrical components, circuit devices, etc., can solve problems such as ignoring the reliability of wind turbines, being unable to accurately describe the randomness of wind turbine output power, and affecting the accuracy of power supply reliability evaluation

Pending Publication Date: 2020-05-29
STATE GRID LIAONING ELECTRIC POWER RES INST +2
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AI Technical Summary

Problems solved by technology

These methods ignore the reliability of the structure of the wind turbine itself, such as gearboxes, motors and inverters, and cannot accurately describe the randomness of the wind turbine output power, which affects the accuracy of power supply reliability assessment

Method used

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  • Distribution network power supply reliability evaluation method considering wind power
  • Distribution network power supply reliability evaluation method considering wind power
  • Distribution network power supply reliability evaluation method considering wind power

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0104] Such as Figure 1-Figure 7 As shown, a distribution network power supply reliability assessment method considering wind power includes the following steps:

[0105] 1. Calculate the parameters of the wind speed distribution function for the collected wind speed.

[0106] 1.1 At intervals of 15 minutes, collect the wind speed measured by the anemometer within one year.

[0107] 1.2 According to the formula (1), the wind speed measured by the measuring instrument within one year is converted into the real wind speed obtained by the fan:

[0108]

[0109] Where: h re Indicates the height of the anemometer; h indicates the height of the fan hub; v re and v represent the wind speed at the measuring instrument and the fan hub respectively; b is the intermediate value; z is the surface roughness.

[0110] 1.3 Use the least squares method for parameter fitting to find the Weibull distribution function f(v) of the wind speed of the fan:

[0111]

[0112] In the formul...

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Abstract

The invention belongs to the technical field of power grid operation safety, and relates to a distribution network power supply reliability evaluation method considering wind power. The method comprises the steps that: wind speed is collected, and a wind turbine wind speed sequence is randomly generated; the reliability of the output power of a wind turbine rotor is calculated; the reliability ofthe power of a wind turbine gearbox is calculated; the reliability of the power of a wind turbine generator is calculated; the power loss of an inverter and the reliability of the inverter are calculated; the reliability of a single wind turbine is calculated; and the power supply reliability of a power distribution network containing wind turbines is calculated. With the method adopted, the uncertainty of the output power of the wind power can be accurately analyzed, the accuracy of the reliability of wind power-containing power supply is improved, and the reliability benefit of the wind power can be reasonably quantified.

Description

technical field [0001] The invention belongs to the technical field of power grid operation safety, and more specifically relates to a distribution network power supply reliability evaluation method considering wind power. Background technique [0002] The National Energy Administration pointed out that by the end of 2020, the cumulative installed capacity of wind power connected to the grid will reach more than 210 million kilowatts, and the annual wind power generation capacity will reach 420 billion kilowatt-hours. The support of national policies and the current domestic wind power equipment technology have promoted the rapid development of wind power. After wind power is connected, it will effectively improve the power supply reliability of the power grid. gender assessment. [0003] The current evaluation method mainly considers the fan as a whole, uses the distribution function to describe the uncertainty of the wind speed, and then describes the uncertainty of the o...

Claims

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Application Information

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IPC IPC(8): H02J3/00H02J3/38G06Q50/06G06Q10/06
CPCH02J3/00G06Q10/0639G06Q50/06Y02E10/76
Inventor 李平李胜辉孙峰戈阳阳谢赐戬张晓桐巩晓伟董鹤楠白雪
Owner STATE GRID LIAONING ELECTRIC POWER RES INST
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