Wind power field energy management system having power grid access control function

An energy management system and access control technology, applied in the field of wind farm monitoring systems and wind farm energy management systems, can solve problems such as the inability to achieve information sharing and integration, and the inability of the wind farm monitoring system to interface with the grid dispatching control system.

Inactive Publication Date: 2008-10-15
STATE GRID ELECTRIC POWER RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the shortcomings that the existing wind farm monitoring system cannot interface with my country's power grid dispatching control system and

Method used

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  • Wind power field energy management system having power grid access control function
  • Wind power field energy management system having power grid access control function
  • Wind power field energy management system having power grid access control function

Examples

Experimental program
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Effect test

example 1

[0066] The invention relates to a wind farm grid connection control program in a wind farm energy management system with a grid access control function.

[0067] The grid-connected wind farm has a total active capacity of 100MW and a reactive capacity of ±33.5MVA. It is composed of 67 double-fed asynchronous wind turbines with a single-machine active capacity of 1.5MW and a reactive capacity of ±0.5MVA. For the 110kV system, the wind speed conditions during grid connection can meet the requirements of the full output of the wind farm.

[0068] The measured real-time grid frequency f is 50Hz, which meets the frequency requirements of wind farm grid connection, and then extracts the real-time voltage of the wind farm access point as 112kV, which meets the voltage requirements of wind farm grid connection. Since the two grid-connection conditions are met, at this time, the wind farm is connected to the grid at a rate of increasing installed capacity by 20% per minute. In the 4th ...

example 2

[0070] Such as image 3 As shown, the wind farm active output control program in the wind farm energy management system with the grid access control function of the present invention.

[0071] The grid-connected wind farm has a total active capacity of 100MW and a reactive capacity of ±33.5MVA. It is composed of 67 double-fed asynchronous wind turbines with a single-unit active capacity of 1.5MW and a reactive capacity of ±0.5MVA. The initial active output of the wind farm is 60MW, the initial active output of each wind turbine is 0.89MW, and the maximum active power change rate per minute is 2% of the rated active capacity. Wind speed changes increase the active output of the wind farm to 70MW. Due to the limitation of the maximum active power change rate, the wind farm will gradually adjust its active output. According to formula (1), the active output of the wind farm is adjusted by 2MW per minute, that is, each The active power output is adjusted to 0.03MW per minute. In...

example 3

[0073] The invention relates to a reactive power output control program of a wind farm in a wind farm energy management system with a power grid access control function.

[0074] The grid-connected wind farm has a total active capacity of 100MW and a reactive capacity of ±33.5MVA. It is composed of 67 double-fed asynchronous wind turbines with a single-machine active capacity of 1.5MW and a reactive capacity of ±0.5MVA. The initial reactive power output of the wind farm is is 0. At this time, if the reactive output value of the wind farm is manually set to 20MVA, the reactive output control program will distribute this value to each wind turbine in proportion to the capacity of the wind turbine, that is, adjust the reactive output of each wind turbine to 0.3MVA, which can satisfy Reactive effort requirements.

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Abstract

The invention relates to a wind farm energy management system which has a function of controlling electric network access, which comprises a substation control layer, a field control layer, a remote control; an access control unit and a communication control unit for the electric network of the wind farm are positioned between the substation control layer and field control layer as an interval layer; the core of the interval layer is the access control unit for the electric network of the wind farm; the access control unit comprises: (1) a synchronization control program for the wind farm, (2) an active power output control program for the wind farm, (3) a reactive power output control program for the wind farm, (4) a control program for regulating the frequency of the system of the wind farm, and (5) a control program for regulating the voltage of the wind farm. The energy management system of the invention has relatively strong function of controlling the real-time output and operation of electric power of the electric network accessed by the wind farm and can be better scheduled and interfaced with the electric network in China, which is beneficial to the mutual coordination, cooperation and operation of the synchronized wind farm and the electric network of the accessed districts; therefore, the data information of the wind farm monitoring system and the monitoring system of the transformer substation can be shared and amalgamated, thus realizing the comprehensive control and being beneficial to the management and operation of the wind farm.

Description

technical field [0001] The invention relates to a wind farm monitoring system, in particular to a wind farm energy management system with a power grid access control function, and belongs to the technical field of wind farm control in new energy power generation technology. Background technique [0002] In the past 10 years, wind power has become the fastest growing clean energy in the world with an annual growth rate of more than 30%. At present, the core control technology of wind power generation has been in the hands of foreign companies. The core control technology such as wind farm monitoring system has not yet been localized, and related control products such as unit control system and wind farm monitoring system are completely dependent on imports. With the increase in the number and scale of wind farms, the disadvantages of the wind farm monitoring system being controlled by others to the operation and management of wind farms are becoming more and more obvious. ...

Claims

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Application Information

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IPC IPC(8): H02J3/38H02J3/40
Inventor 王伟朱凌志陈宁朱晓东
Owner STATE GRID ELECTRIC POWER RES INST
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