Dynamic equivalence method for double-fed type wind power plant based on active response

A dynamic equivalence and wind farm technology, applied in the field of value, can solve the problems of unable to complete the grouping of wind turbines offline, unable to take into account the amount of calculation and the accuracy of equivalent value, etc.

Active Publication Date: 2016-12-07
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention is to solve the problem that the existing wind farm equivalent method cannot take into account the amount of calculation and the equivalent accuracy, and at the same time cannot complete the grouping of wind turbines off-line

Method used

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  • Dynamic equivalence method for double-fed type wind power plant based on active response
  • Dynamic equivalence method for double-fed type wind power plant based on active response
  • Dynamic equivalence method for double-fed type wind power plant based on active response

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Experimental program
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specific Embodiment approach 1

[0044] Specific implementation mode one: refer to Figure 30 Specifically illustrate this embodiment, the doubly-fed wind farm dynamic equivalence method based on active power response described in this embodiment, it comprises the following steps:

[0045] Step 1. Build the electromagnetic transient model of the doubly-fed wind turbine, and carry out the three-phase short-circuit fault simulation under the low power output and high power output conditions of the wind turbine respectively, and compare the parameter data obtained by the simulation with the field The parameter data obtained in the test experiment is compared, and the weighted average absolute error of the simulation result and the field experiment test result is obtained, and the average absolute error meets the standard accuracy requirement, and then step 2 is performed;

[0046] Step 2. Obtain the transient active power response curve of the doubly-fed wind turbine transient model in the full wind speed operat...

Embodiment

[0051] The following is an implementation example of the present invention. Taking a 3×6 wind farm composed of a double-fed wind turbine as an example, the specific steps and results are as follows:

[0052] 1. Build the electromagnetic transient simulation model of the double-fed wind turbine. According to the "Technical Regulations for Wind Turbine Connected to the Power System", the three-phase short-circuit fault simulation is carried out under the two working conditions of the wind turbine with low power output and high power output. Compared with the field test experiment, if the accuracy meets the requirements of the "Guidelines for Modeling Electrical Simulation Models of Wind Turbine Units", proceed to step 2.

[0053] 2. Obtain the transient active power response curve of the wind turbine when a three-phase short-circuit fault occurs at the grid connection point within the full wind speed operation area (cut-in wind speed to cut-out wind speed, wind speed interval is ...

specific Embodiment approach 2

[0089] Specific embodiment 2: This embodiment is to further explain the dynamic equivalent method of doubly-fed wind farm based on active power response described in specific embodiment 1. In this embodiment, in step 1, the parameter data obtained by simulation is wind power The voltage, current, active power and reactive power at the outlet of the unit, and the fault duration is 0.625s;

[0090] In step 1, the parameter data obtained by the simulation is compared with the parameter data obtained by the field test experiment, and the specific process of obtaining the weighted average absolute error between the simulation result and the field test result is as follows:

[0091] Compare the active power response curve with the field tested active power data, compare the reactive power response curve with the field tested reactive power data, compare the voltage response curve with the field tested voltage data, and compare the current response The curve is compared with the curr...

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Abstract

The invention provides a dynamic equivalence method for a double-fed type wind power plant based on active response and relates to the technical field of simulation modeling of an electric system. The invention aims to solve the problems of the present equivalence method for the wind power plant that the calculated amount and the equivalent precision cannot be considered and the fan clustering cannot be offline completed. The method comprises the following steps: establishing an electromagnetic transient model of a wind turbine generator and performing three-phase short-circuit simulation and on-site test experimental comparison; acquiring a transient active power response curve of the wind turbine generator in a full-wind-speed running area if the precision meets the standard; acquiring a clustering index according to the clustering characteristics of the curve; setting an active power error threshold according to the equivalence precision requirement, performing equivalent calculation on the typical wind speed distribution and adding the unit equivalent wind speed in the corresponding wind speed section as a supplementary cutting point if the precision does not meet the requirement; and causing the units in each cluster of the practical wind power plant be equivalent to one unit according to the offline acquired clustering indexes and calculating the equivalent parameters of the equivalent units and electric networks, thereby acquiring an equivalent model of the wind power plant.

Description

technical field [0001] The invention relates to a dynamic equivalent method for a doubly-fed wind farm, and belongs to the technical field of power system simulation modeling. Background technique [0002] Due to the increasingly severe energy and environmental problems, wind energy has been widely used in power systems due to its advantages in technology and cost. However, with the rapid increase of wind energy penetration, the operational reliability and stability of the power system have been affected and impacted to a certain extent. Therefore, the accuracy of analysis and calculation of large-scale integration of wind power into the power system is getting higher and higher. A wind farm often has dozens or even hundreds of wind turbines, and each wind turbine is composed of wind turbines, transmission shafts, generators, converters and their controllers, protection devices and their controllers, and other modules. If Modeling each wind turbine separately will greatly i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/20Y02E60/00
Inventor 晁璞璞李卫星齐金玲常学飞
Owner HARBIN INST OF TECH
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