Electronic transformer amplitude and phase error checking system with networked detection function

Abstract

The invention discloses an electronic transformer amplitude and phase error checking system with a networked detection function. Specifically, the system receives analog data acquired by a standard transformer, and digital sampling value message data sent by the electronic transformer, adopts a self-adaptive algorithm based on equal interval sampling at different sampling frequencies and signal quasi-synchronous characteristics, and obtains the amplitude, phase error and other parameters of each channel by standardized calculation through comparison. The system provided by the invention can be used for amplitude and phase error checking of electronic voltage and current transformers of various types in an intelligent substation, and can realize the networked detection of single-path or multi-path electronic transformers and merge unit circuits without external synchronization signal pulse in the traditional testing scheme, so that the transformer testing system is simplified, the impact of tedious discrete functional testing work and testing blind points of a multiplexer is avoided, the testing time of equipment is shortened, and the detection efficiency of the electronic transformer is improved.

Description

technical field [0001] The invention discloses an electronic transformer amplitude and phase error checking system capable of network detection, and belongs to the technical field of power system intelligent substations. Background technique [0002] With the rapid development of the power system, electromagnetic power transmission and transformation equipment has been fully developed. Voltage and current transformers are important equipment for providing voltage and current signals for power system energy measurement, relay protection equipment, measurement and control equipment, etc. The operation stability and reliability are closely related to the safe, reliable and economical operation of the power system. With the increase of the application environment and the increase of the voltage level, the traditional electromagnetic transformer gradually exposes the magnetic saturation, ferromagnetic resonance, high frequency Problems such as poor response characteristics, secon...

AI Technical Summary

Problems solved by technology

[0007] When performing electronic transformer calibration, it is generally necessary to configure a merging unit device to cooperate with the function and accuracy test of the transformer. The actual operating merging unit, that is, the entire measurement circuit of the electronic transformer, cannot be tested, or cannot be tested for the upcoming The performance of the entire circuit on site cannot be verified, and there are obvious blind spots in the test; if the network-based test method is used, the application equipment and the overall measurement of the site can be performed without adding equipment. The circuit is fully tested, the integrity and reliability of the test are greatly improved, and the foundation for high-precision measurement operation of the equipment is laid

[0008] In addition, due to the point-to-point sampling method and the limitation of the number of optical fiber Ethernet interfaces of the transformer calibration system, in the case of a large number of transformer tests, only a single transformer of the same type can be tested at the same time, and the workload of simple repeated testing Large, to a certain extent, it will affect the accuracy of substation protection, measurement and control, and measurement, and in severe cases, it will affect the safe and stable operation of the substation integrated automation system

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