Harmonic model parameter identification method, device, storage medium and electronic equipment

A technology of model parameters and identification methods, which can be used in measurement devices, measurement power, fault locations, etc., and can solve problems such as inaccurate admittance parameters.

Active Publication Date: 2019-01-01
GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +2
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, an embodiment of the present invention provides a harmonic model parameter identification method, device, storage medium and electronic equipment to solve the problem of inaccurate admittance parameters obtained in the harmonic model parameter identification method in the prior art
Through this step, the relationship between each harmonic voltage at the port and each harmonic current of the harmonic source branch is accurately described based on the measurement data, which is more accurate than the admittance parameter obtained by the traditional harmonic source parameter identification method Reflect the influence of the harmonic source on the port voltage accurately, and solve the problem of inaccurate admittance parameters obtained by the harmonic model parameter identification method in the prior art

Method used

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  • Harmonic model parameter identification method, device, storage medium and electronic equipment
  • Harmonic model parameter identification method, device, storage medium and electronic equipment

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Embodiment 1

[0045] The embodiment of the present invention provides a harmonic model parameter identification method, figure 1 is a flowchart of a harmonic model parameter identification method according to an embodiment of the present invention, such as figure 1 As shown, the harmonic model parameter identification method includes:

[0046] Step S101: collect the fundamental voltage value and each harmonic voltage value at the port of the interference source to be estimated; specifically, collect the amplitude and phase angle measurement values ​​of the fundamental voltage at the port of the interference source to be estimated in the power grid, and the harmonic voltage The amplitude and phase angle measurements of ;

[0047] Step S102: collect the fundamental current value and each harmonic current value of the interference source branch to be estimated; specifically, collect the amplitude and phase angle measurement values ​​of the fundamental current of the interference source branch...

Embodiment 2

[0080] An embodiment of the present invention provides a harmonic model parameter identification device, which is used to realize the above-mentioned embodiments and preferred implementation modes, and what has already been described will not be repeated. As used below, the term "module" may be a combination of software and / or hardware that realizes a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, implementations in hardware, or a combination of software and hardware are also possible and contemplated.

[0081] An embodiment of the present invention provides a harmonic model parameter identification device, such as image 3 As shown, the device includes a first collection module 31, a second collection module 32 and a processing module 33, wherein the first collection module 31 is used to collect the basic voltage value and each harmonic voltage value at the port of the interference source to be estim...

Embodiment 3

[0085] The embodiment of the present invention also provides a computer-readable storage medium, where the computer-executable instruction is stored in the computer-executable instruction, and the computer-executable instruction can execute the harmonic model parameter identification method in any method embodiment above. Wherein, the storage medium may be a magnetic disk, an optical disk, a read-only memory (Read-Only Memory, ROM), a random access memory (Random Access Memory, RAM), a flash memory (Flash Memory), a hard disk (Hard Disk) DiskDrive, abbreviation: HDD) or solid-state disk (Solid-State Drive, SSD), etc.; the storage medium may also include a combination of the above-mentioned types of memory.

[0086] Figure 5 It is a schematic diagram of the hardware structure of the electronic device according to the harmonic model parameter identification method of the embodiment of the present invention, as shown in Figure 5 As shown, the device includes one or more proces...

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Abstract

The invention provides a harmonic model parameter identification method, device, a storage medium and electronic equipment. The method comprises steps: a fundamental voltage value and various harmonicvoltage values at a to-be-estimated interference source port are acquired; a fundamental current value and various harmonic current values of a to-be-estimated interference source branch are acquired; and according to the above measured data, a harmonic admittance parameter in the current predetermined time period is obtained. Through the harmonic model parameter identification method, the relationship between various harmonic voltage at the port and various harmonic current of a harmonic source branch can be accurately described based on the measured data, in comparison with the admittance parameter obtained by the traditional harmonic source parameter identification method, influences of the harmonic source on port voltage can be reflected more accurately, and the problem that the harmonic model parameter identification method in the prior art can not obtain an accurate admittance parameter is solved.

Description

technical field [0001] The invention relates to the technical field of power grid evaluation, in particular to a harmonic model parameter identification method, device, storage medium and electronic equipment. Background technique [0002] In recent years, with the wide application of nonlinear power electronic devices in the power system, the problem of harmonic pollution in the power grid has become increasingly prominent. In order to evaluate the influence of harmonic sources on the harmonic voltage of the power grid, it is often necessary to calculate the harmonic source admittance Changes. [0003] The harmonic model parameter identification method in the prior art usually builds an admittance array for all harmonics, resulting in the calculated admittance parameters not accurately reflecting the influence of the harmonic source on the port voltage, and the obtained harmonic source parameters It is impossible to accurately characterize the timing changes of the influen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/08
CPCG01R31/088
Inventor 李亚琼王同勋周胜军赵国亮王翀
Owner GLOBAL ENERGY INTERCONNECTION RES INST CO LTD
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