Flexible alternating current/direct current electronic transformer checking device based on mixed sampling

An electronic transformer and mixed sampling technology, which is applied in the direction of measuring devices, instruments, and measuring electrical variables, can solve the problems that the calibration work cannot be truly completed, and the calibration work of AC and DC electronic transformers cannot be compatible. Facilitate system implementation, increase DC accuracy test, and reduce difficulty

Active Publication Date: 2015-12-30
ELECTRIC POWER SCI RES INST OF JIANGSU ELECTRIC POWER +2
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Problems solved by technology

[0006] The technical problem solved by the present invention is to overcome the problem that the existing open-loop test method to verify the electronic

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  • Flexible alternating current/direct current electronic transformer checking device based on mixed sampling

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[0020] The present invention will be further described below in conjunction with the accompanying drawings of the specification.

[0021] The hybrid sampling-based flexible AC / DC electronic transformer calibration device of the present invention adopts an embedded real-time operating system, so that the entire system has strong real-time performance, and a large current required for testing is generated by a primary up-current circuit. Test the accuracy of AC and DC electronic transformers in UPFC at different ratio points, relying on standard transformers as a reference for high-precision analog data acquisition, high-precision and low-temperature coefficient non-inductive sampling resistors to achieve precise I / V conversion, and secondary output A small voltage signal can reflect the true amount of current applied at a time, greatly reducing the accuracy requirements for the primary side signal source, reducing the difficulty and facilitating system implementation, such as figur...

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Abstract

The invention discloses a flexible alternating current/direct current electronic transformer checking device based on mixed sampling. The flexible alternating current/direct current electronic transformer checking device comprises a primary rising current circuit, a high-precision alternating current AD acquisition circuit, a high-precision direct current AD acquisition circuit, a standard transformer, an I/U converter, a main-control CPU module and a digital value acquisition module; an electronic transformer body to be checked is connected in series with the standard transformer and the primary rising current circuit sequentially through an optical fiber; the standard transformer is connected with the high-precision alternating current AD acquisition circuit; the primary rising current circuit is connected with the high-precision direct current AD acquisition circuit; the high-precision alternating current AD acquisition circuit and the high-precision direct current AD acquisition circuit are connected with the main-control CPU module; a merging unit is connected with the main-control CPU module through the digital value acquisition module; the main-control CPU module also sends synchronous signals to the high-precision alternating current AD acquisition circuit and the digital value acquisition module. Through the adoption of the device, alternating current and direct current checking of the transformer in a UPFC can be realized, the use is convenient, and the application prospect is excellent.

Description

technical field [0001] The invention belongs to the technical field of power electronics, and in particular relates to a flexible AC / DC electronic transformer calibration device based on mixed sampling. Background technique [0002] Flexible AC transmission technology is a new technology for flexible and rapid control of AC transmission formed by integrating power electronics technology, microprocessing and microelectronics technology, communication technology and control technology, which can enhance the stability of AC power grid and reduce the cost of power transmission. The technology improves transmission quality and efficiency by providing inductive or reactive power to the grid. [0003] Unified Power Flow Controller (UPFC) is a new generation of flexible AC power transmission device with the most powerful functions and the most superior characteristics, and it is also the most versatile FACTS device so far. Including all the capabilities of voltage regulation, serie...

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Application Information

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IPC IPC(8): G01R35/02
Inventor 李鹏高磊黄浩声汤汉松林金娇弓新月袁宇波
Owner ELECTRIC POWER SCI RES INST OF JIANGSU ELECTRIC POWER
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