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Assessment method for wind power consumption capability of electric power system

A power system and wind power technology, which is applied in the evaluation field of the power system's ability to absorb wind power, can solve the problems of lack of an evaluation method for evaluating the power system's ability to absorb wind power, and the inability to effectively improve the wind power consumption capacity.

Inactive Publication Date: 2016-01-27
STATE GRID CORP OF CHINA +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the existing technology lacks an evaluation method for evaluating the ability of the power system to accommodate wind power, resulting in the inability to effectively improve the ability to accommodate wind power, and to provide an evaluation method for the ability of the power system to accommodate wind power

Method used

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  • Assessment method for wind power consumption capability of electric power system
  • Assessment method for wind power consumption capability of electric power system
  • Assessment method for wind power consumption capability of electric power system

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specific Embodiment approach 1

[0023] Specific implementation mode one: combine figure 1 To illustrate this embodiment, the method for evaluating the ability of a power system to accommodate wind power described in this embodiment includes the following steps:

[0024] Step 1. Determine relevant parameters;

[0025] Step 2. Calculate the peak shaving capacity P peakload :

[0026] P p e a k l o a d = P G N - P ...

specific Embodiment approach 2

[0081] Specific Embodiment 2: This embodiment is a further limitation of the evaluation method for the wind power capacity of the power system described in Embodiment 1. In this embodiment, the equivalent installed capacity P of the power grid in Step 1 D The method of obtaining is:

[0082] P D =2P C +P S +0.7P Q +0.5P M +0.2P R (6)

[0083] In the formula: P C is the installed capacity of pumped storage units in the power grid, in units of 10,000 kilowatts (MW);

[0084] P S It is the installed capacity of hydroelectric motors in the power grid, the unit is 10,000 kilowatts (megawatts);

[0085] P Q It is the installed capacity of fuel (gas) units in the power grid, in units of 10,000 kilowatts (MW);

[0086] P M It is the installed capacity of coal-fired units in the power grid, in units of 10,000 kilowatts (megawatts);

[0087] P R It is the installed capacity of the heating generator in the power grid, and the unit is 10,000 kilowatts (megawatts).

[0088] ...

specific Embodiment approach 3

[0089] Specific implementation mode three: this implementation mode is a further limitation of the evaluation method for the wind power capacity of the power system described in the first implementation mode. In this implementation mode, S BR The transformation capacity of wind power connected to the grid is mainly considered. Since wind farms are mainly connected at a voltage level of 35 kV and above, the following calculation formula is given:

[0090] S BR = S 35 +S 110(66) +S 220 +S 500(330) +S 750 (8)

[0091] where S 35 , S 110(66) , S 220 , S 500(330) , S 750 They are 35kV variable capacity, 110kV or 66kV variable capacity, 220kV variable capacity, 500kV or 330kV variable capacity, and 750kV variable capacity.

[0092] After the variable capacity is calculated, the wind power accommodation adaptability evaluation index β based on the grid scale can be obtained S , usually calculated by β S less than 1.

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Abstract

The invention provides an assessment method for the wind power consumption capability of an electric power system and relates to the evaluation technology of the wind power consumption capability of the electric power system. The invention solves the problems that the prior art lacks an assessment method for the wind power consumption capability of an electric power system and the wind power consumption capability cannot be effectively improved. The method comprises steps of firstly obtaining related parameters, then calculating the peak-load regulating capacity, peak-load regulating margin, wind power consumption capacitor and evaluation index in sequence, and finally determining the wind power consumption capability of the electric power system according to the evaluation index. The invention comprehensively considers multiple factors such as the power grid installed capacity, set type, load level, connection line load regulating capability, can scientifically and reasonably evaluate the consumption capability of a power grid, and analyzes main factors which influence the consumption capability by comparison, so that the basis is provided for related measures for improving the wind power consumption capability, thereby effectively improving the wind power consumption capability. The method is suitable for evaluating the wind power consumption capability of the electric power system.

Description

technical field [0001] The invention relates to the evaluation technology of the ability of a power system to accommodate wind power. Background technique [0002] After nearly ten years of rapid development, wind power generation has already accounted for a considerable proportion of its installed capacity in the power grid, and has become one of the main power sources especially in the Northeast and Northwest regions. Under the current situation, the power grid company has taken various measures to improve the capacity of wind power consumption. Nevertheless, most of the wind farms in my country's wind energy resource-rich areas are far away from the load center, and due to the randomness and intermittent nature of wind power output, it still brings great difficulties to power grid dispatching and peak regulation. It is very important to analyze and evaluate the adaptability of the power system to wind power accommodation based on various factors and the characteristics of...

Claims

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Application Information

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IPC IPC(8): H02J3/38
CPCY02E10/76
Inventor 郝文波徐冰亮孙承志陈晓光于海洋曹融崔佳鹏
Owner STATE GRID CORP OF CHINA
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