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Method for reducing loss of wind farm

A wind farm and network loss technology, applied in wind power generation, single grid parallel feeding arrangement, reactive power compensation, etc., can solve problems such as active power loss, and achieve the effect of reducing wind farm network loss

Inactive Publication Date: 2012-03-21
ZHEJIANG WINDEY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The loss caused by the flow of reactive power in the wind farm is variable; at present, most of the domestic wind turbines that have been connected to the grid are set to run at a constant power factor, and the reactive power flow generated by the wind turbines The energy harvesting system of the wind farm will generate active power loss. Such a reactive power distribution method must not minimize the total active power loss caused by the flow of reactive power in the wind farm.

Method used

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  • Method for reducing loss of wind farm
  • Method for reducing loss of wind farm
  • Method for reducing loss of wind farm

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0034] The flow chart of reducing wind farm network loss provided by the embodiment of this application is as follows figure 1 shown, including:

[0035] Step S101: Obtain the operating status, active power value and total reactive power required by the wind farm for operation of each wind power generating set in the wind farm;

[0036] During the operation of the wind farm, each wind turbine in the wind farm will feed back its own operating status and active power value to the control center of the wind farm in real time; The power value is determined;

[0037] Step S102: Establishing an objective function of network loss of the wind farm according to the operating status, active power value, and reactive power required by the wind farm of each wind power generating set;

[0038] For the wind farm, the total network loss of the energy harvesting system of the wind farm, including load loss and no-load loss;

[0039] The wind farm energy harvesting system includes the box t...

Embodiment 2

[0092] As in the embodiment of this application Figure 4 as shown, Figure 4 Simplified model for a wind farm with three wind turbines. The establishment of the wind farm model is mainly the impedance model of the wind farm collection system, which includes the box transformer connecting the wind turbine and the impedance, the main transformer connecting the energy harvesting system to the grid, and all line impedances in the wind farm.

[0093] Figure 4 The wind farm shown includes three wind turbines G1, G2, and G3, and the active powers of the three wind turbines are respectively P(G1)=0.5, P(G2)=0.5, and P(G3)=0.5; Units G1, G2, and G3 are respectively connected to independent box transformers T1, T2, and T3; they are collected to the common connection point of the wind farm through cable lines, and the impedance values ​​of the box transformers are Z(T1)=Z(T2)=Z(T3) =0.01+j0.07; Since the distance between each wind turbine to reach the common connection point is diff...

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Abstract

The invention discloses a method for reducing a loss of a wind farm. The method comprises the following steps of: obtaining operation states and active power values of each wind generating set in the wind farm and a total reactive power needed by the wind farm; establishing a target function of the loss of the wind farm according to the obtained power values; carrying out minimization treatment on the target function to obtain reactive power values of each wind generating set when the target function has the minimum value; and allocating the obtained reactive power values to the corresponding wind generating set. According to the method for reducing the loss of the wind farm provided by the invention, because the reactive power sent by each wind generating set is determined when the loss of the wind farm is minimum, the loss of the wind farm is correspondingly reduced by each wind generating set due to that the reactive power loss generated by flowing the reactive power which is sent by the allocated reactive power values in the farm wind is minimum.

Description

technical field [0001] The invention relates to the field of wind farm energy management, in particular to a method for reducing wind farm network loss. Background technique [0002] Wind power resources are inexhaustible, and using wind power to generate electricity can reduce environmental pollution and save conventional energy such as coal and oil. At present, my country's wind power generation is still in its infancy, especially the control system of wind turbine groups or wind farms is still in the early stage of development; the control of wind farms is mainly based on the voltage of the public connection point of the wind farm or the active Work power (power factor) is the control target. [0003] Both the generation of active power and the flow of reactive power in a wind farm will cause energy loss. The loss of active power is caused by the resistance production capacity in the energy harvesting system of the wind farm. It is generally believed that the loss caused...

Claims

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Application Information

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IPC IPC(8): H02J3/46H02J3/18
CPCY02E40/30Y02E10/763Y02E10/76
Inventor 杨靖许国东
Owner ZHEJIANG WINDEY