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A Method to Ensure the Consistency of Digital Output of Electronic Transformer

An electronic transformer and digital output technology, applied in the field of electric power, can solve problems such as error-prone and complicated operation, and achieve the effects of reducing workload, simple and convenient operation, and avoiding system errors

Active Publication Date: 2016-04-20
武汉烽火富华电气有限责任公司
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  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to overcome the problem of complicated and error-prone operations during the engineering installation and maintenance and replacement of electronic transformers after they leave the factory, the present invention provides a method to ensure the consistency of digital output of electronic transformers, and only needs to operate the merging unit command on site , without manual parameter configuration and on-site debugging or calibration, the installation or replacement can be completed, and the digital output of the electronic transformer is guaranteed to be consistent

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  • A Method to Ensure the Consistency of Digital Output of Electronic Transformer

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specific Embodiment approach

[0024] First, describe the specific embodiment of the present invention as a whole: a method for ensuring the consistency of the digital output of an electronic transformer, the method comprising the following steps:

[0025] Step 1), test the sensor separately, record the deviation between its actual output and the rated output, and record it as Ks;

[0026] Step 2), test the converter alone, record the offset of its output, and record it as Kc;

[0027] Step 3), the converter receives the data transmitted from the upper computer through the merging unit, that is, the two sets of deviation compensation coefficients Ks and Kc obtained from the test, and saves them in the non-volatile memory chip;

[0028] Step 4), after the sensor and the converter are combined, the converter transmits the real-time sampled digital signal to the merging unit through the optical fiber, and at the same time transmits the product number ID and compensation coefficient to the merging unit in the d...

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Abstract

The invention relates to a method for guaranteeing the digital output consistency of an electronic transformer. The electronic transformer comprises a sensor, a converter, a transmission optical fiber, a merging unit and the like. The digital output consistency comprises the consistency of amplitude precision, phase precision, constant time lag and the like. All diameters are stored in the converter and the merging unit, parameter identification and synchronization are achieved through communication of the converter and the merging unit, the digital quality is corrected according to the parameters in the merging unit, and the purpose that the entire performance of the electronic transformer is consistent is achieved. The method is high in pre-installation performance, manually writing parameters after the electronic transformer leaves a factory is of no need, operation is simple, maintaining or replacing is very easy, the parameters are stored in two places, and the reliability is high.

Description

technical field [0001] The invention belongs to the field of electric power, in particular to a method for ensuring the digital output consistency of an electronic transformer. technical background [0002] At present, with the development of smart grid, there are more and more smart substations, and electronic transformers are an important part of them. Electronic transformers are mainly composed of sensors, converters and merging units. Due to the limitations of the production process and other reasons, it is difficult to ensure that the output characteristics of the sensor are completely consistent, and due to the deviation of the analog conditioning circuit of the converter and the delay of AD conversion, there will be a certain ratio difference and phase difference after the signal is converted into a digital signal. In order to ensure that the overall accuracy of the electronic transformer can meet the requirements, it is necessary to compensate and calibrate the devi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J13/00
Inventor 刘立斌李晓方兵朱宝崔新友易佳黄俊
Owner 武汉烽火富华电气有限责任公司
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