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Anfis digital pre-distortion method of a relay protection testing device lpa

A relay protection testing and digital technology, applied in measuring devices, electrical digital data processing, CAD numerical modeling, etc., to achieve the effect of improving cost performance, meeting accuracy requirements, and mature technology

Active Publication Date: 2019-07-19
CHONGQING WATER RESOURCES & ELECTRIC ENG COLLEGE
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Problems solved by technology

[0003] The purpose of the present invention is to propose an ANFIS digital pre-distortion method of a relay protection test device LPA to solve the technical problem that a new generation of relay protection test devices requires wide frequency band while realizing a wide dynamic range

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[0046] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in detail below in conjunction with specific embodiments. It should be pointed out that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0047] The invention discloses a digital pre-distortion method of an adaptive neuro-fuzzy inference system (ANFIS) of a linear power amplifier (linear poweramplifier, LPA) of a relay protection testing device. The present invention uses ANFIS to approach the nonlinear inverse digital model of the relay protection test device LPA on the compact set after training and learning, and replaces the inverse digital model to generate the command voltage / current corresponding to the ideal output voltage / current to realize Digital Predistortion. The present invention considers all possible non-linearities of the LPA from the digital-t...

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Abstract

The invention discloses an ANFIS (Adaptive Neuro-Fuzzy Inference System) digital pre-distorting method of a relay protection test device LPA (Linear Power Amplifier). An ANFIS after training and learning approaches a nonlinear inverse digital model of a relay protection test device LPA on a compact set, and replaces the inverse digital model to produce an instruction voltage / current corresponding to an ideal output voltage / current to realize digital pre-distorting. The method considers all possible nonlinearity of the LPA from an analog-to-digital converter to each amplifier stage to a load on the whole, and no longer requires rigorous precision of each amplifier stage. A quasi-online mode is adopted, digital pre-distorting can be realized on most of existing microprocessors, and the cost performance is improved. With the help of the adaptive ability of ANFIS, the method can adapt to loads of different features and values. The method not only can meet the precision requirement of fault waveform recurrence, but also can make full use of the limited bandwidth and output capacity of LPA.

Description

technical field [0001] The invention belongs to the technical field of relay protection, in particular to an ANFIS digital pre-distortion method for a linear power amplifier (LPA) of a relay protection testing device. Background technique [0002] The relay protection test device has become an indispensable tool for setting and verifying relay protection and safety automatic devices. In order to comprehensively and meticulously analyze the action details of relay protection and safety automatic devices under real faults in the power system, modern testing requires that the relay protection test device should be able to output various fault voltage / current waveforms more accurately, and the waveform data can be obtained from Software emulation or fault recorder. On the one hand, because the relay protection and safety automatic devices are connected to the secondary side of the voltage and current transformer, the relay protection test device must amplify the voltage and cur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/00G06F17/50G06N3/02G06N99/00
CPCG01R31/00G06F30/20G06F2111/10G06N3/02G06N20/00
Inventor 孙晓明彭炜峰张明钱张莉
Owner CHONGQING WATER RESOURCES & ELECTRIC ENG COLLEGE
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