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Wind power reactive power automatic control method for wind farm monitoring system

A technology of automatic power control and monitoring system, which is applied in wind power generation, electrical components, circuit devices, etc., can solve problems such as the inability to realize online automatic power adjustment of wind farms, achieve powerful automatic control functions of wind power power, and improve automatic operation and management horizontal effect

Inactive Publication Date: 2019-03-26
南京天谷电气科技有限公司
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the shortcomings in the prior art that the wind farm monitoring system cannot realize the online automatic power adjustment of the wind farm, and propose a wind power reactive power automatic control method for the wind farm monitoring system

Method used

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  • Wind power reactive power automatic control method for wind farm monitoring system
  • Wind power reactive power automatic control method for wind farm monitoring system
  • Wind power reactive power automatic control method for wind farm monitoring system

Examples

Experimental program
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Effect test

Embodiment 1

[0028] refer to figure 1 , a wind power reactive power automatic control method for a wind farm monitoring system, comprising the following steps:

[0029] S1. Determine the control mode, adopt the plan tracking mode, and enter step S2;

[0030] S2. Plan tracking mode:

[0031] A1. Calculate the voltage deviation ΔV according to the grid-connected point voltage V issued by the dispatching department. The formula is as follows:

[0032] Q'=Q pre +S×△V

[0033] In the formula, Q pre is the real-time reactive power of the wind farm at the previous moment, and S is the sensitivity information of the reactive power of the wind farm node with respect to the voltage of the grid connection point;

[0034] A2. Calculate the reactive power adjustment Q' of the wind farm according to the formula according to ΔV, and enter step S4;

[0035] S4. Judging whether the adjusted reactive output Q′ of the wind farm meets the operation requirements of the wind farm, if Q′>Q max or Q′min , ...

Embodiment 2

[0041] refer to figure 1 , a wind power reactive power automatic control method for a wind farm monitoring system, comprising the following steps:

[0042] S1, judging the control mode, adopting the self-adaptive adjustment mode, and entering step S3;

[0043] S3. Adaptive adjustment mode:

[0044] B1. Set the standard voltage reference value V ref 1.0p.u., read the real-time voltage V of the access point of the wind farm, if it meets 0.98V ref ≤V≤1.02V ref conditions, the wind farm does not carry out voltage and reactive power control, and still operates according to the current reactive power output. If the above conditions are not met, go to step B2;

[0045] B2. Calculate the voltage deviation ΔV of the grid-connected point of the wind farm, and calculate the reactive power adjustment Q′ of the wind farm according to the formula according to ΔV, the formula is as follows:

[0046] Q'=Q pre +S×△V

[0047] In the formula, Q pre is the real-time reactive power of the ...

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Abstract

The invention relates to the technical field of wind farm control in the new energy power generation technology. The method comprises the steps of (S1) judging a control mode, going to a step (S2) ifthe control mode is a planned tracking mode, and going to a step (S3) if the control mode is an adaptive adjustment mode, (S2) performing the planned tracking mode, (S3) performing the adaptive adjustment mode, (S4) judging whether adjusted wind farm reactive power output Q' meets a wind farm operation requirement, and (S5) allocating obtained real-time reactive power output of a wind farm to eachwind turbine according to the capacity proportion of the wind turbine, performing reactive power regulation, and returning to the step (S1) after a delay of one second. According to the method, the real-time power output of the wind farm can be uniformly planned at a wind farm level, and the coordinated operation of a grid-connected wind farm and an accessed region power grid is facilitated.

Description

technical field [0001] The invention relates to the technical field of wind farm control in new energy power generation technology, in particular to an automatic wind power reactive power control method used in a wind farm monitoring system. 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. [0003] The wind farm central moni...

Claims

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Application Information

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IPC IPC(8): H02J3/50
CPCH02J3/386H02J3/50H02J2203/20Y02E10/76
Inventor 丁剑锋曹波杨玲
Owner 南京天谷电气科技有限公司
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