Overload control method suitable for large-scale wind power centralized access

A centralized access and overload control technology, which is applied in wind power generation, electrical components, emergency protection circuit devices, etc., to achieve efficient machine cut-off measures, reduce the probability of reoccurrence of overload, and respond well

Active Publication Date: 2013-09-04
NARI TECH CO LTD +2
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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of overload control of large-scale wind power centralized access in the prior art, to provide a machine that can dynamically and optimally select the machine cut object, and can adopt a more targeted machine cut according to different situations. method of method

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  • Overload control method suitable for large-scale wind power centralized access
  • Overload control method suitable for large-scale wind power centralized access
  • Overload control method suitable for large-scale wind power centralized access

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Embodiment Construction

[0019] The present invention will be described in further detail below with reference to the accompanying drawings and examples.

[0020] The principle of the present invention is as follows: when the wind power transmission line is overloaded, the stability control device of the control master station calculates the current wind power overload amount according to the current power grid operation mode and the power flow situation of the power transmission section, queries the control strategy table, and determines the wind power related to the overload line. According to the real-time sampling data, analyze the output change trend of each relevant wind farm, give priority to cut off the current wind farm whose output is in the rising stage, if not enough cut, then allocate the remaining cut to other wind farms related to overload.

[0021] The output variation trend of each wind farm needs to be determined by online analysis of real-time sampling data. Since the real-time samp...

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Abstract

The invention discloses an overload control method suitable for large-scale wind power centralized access, belonging to the field of power system security and stability control. The overload control method aims at a regional power grid with large-scale wind power centralized access; when a wind power send-out circuit has overload, an overload cut-off measure can select the cut-off object in a way of dynamic optimization by analyzing the output force change trends of all wind power plants related to the circuit with overload, and has two dealing methods according to the possible conditions. The overload control method enables the cut-off measure to be more effective, and reduces the probability of overload recurrence of the wind power send-out circuit.

Description

technical field [0001] The invention relates to the field of power system safety and stability control, more precisely, the invention relates to a method for solving the overload control problem of large-scale wind power centralized access. Background technique [0002] China's wind energy resources are mainly distributed in the "Three North" regions. These areas are limited by low power load levels, small system scales, and insufficient local wind power consumption. Large-scale wind power must be sent to regional power grids or even other regional power grids for consumption. Due to the randomness and volatility of wind power output, the design of wind power transmission lines is generally difficult to meet the needs of wind power transmission in all time periods. When there is a large amount of wind power in a certain period of time, the wind power transmission line may be overloaded; or when the two-circuit transmission line has a permanent failure of one circuit, the oth...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02H7/26
CPCY02E10/76
Inventor 李雪明陈汹陈永华罗剑波张建波许士光李琳
Owner NARI TECH CO LTD
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