Real-time operation state collection system of high-voltage mutual inductor group

Abstract

The invention discloses a real-time operation state collection system of a high-voltage mutual inductor group. The system comprises a synchronization module, a collection module, a merging module andan output module; the synchronization module comprises a Beidou / GPS reception module and a synchronization control core module, receives Beidou / GPS signals, provides PPS pulses and a time-service signal, and supports real-time synchronous collection among multiple collection systems; the collection module realizes A / D sampling and characteristic quantity extraction on secondary output electrical analogy signals of groups of mutual inductors; the merging module merges characteristic quantity extraction results of multiple channels, and extracts absolution time from the Beidou / GPS time-service signal; and the output module transmits a collection result to local and remote terminals, and the result can be used to evaluate an operation error of the mutual inductor group in real time. Via the system, operation state data of the groups of mutual inductors in the power grid can be collected synchronously in high precision and in real time, and data basis is provided for evaluation of the operation error of the mutual inductor group.

Description

technical field [0001] The invention relates to a real-time collection system for a high-voltage transformer group, in particular to a real-time collection system for the running state of a high-voltage transformer group. Background technique [0002] The high-voltage transformer group is used to measure the large current and high voltage of the power system, providing the most basic and important measurement data for the power grid. Power transformers are regarded as the "eyes" and "ears" of the power system. There are a large number of power transformers. According to incomplete statistics, in 2015, the number of power transformers with a voltage level of 220kV and above in the national power grid exceeded 200,000. The above voltage level exceeds 1 million units. With the advancement of my country's smart grid construction, new sensing technologies and data transmission technologies such as electronic transformers and digital merging units have been gradually promoted. Co...

AI Technical Summary

Problems solved by technology

According to years of on-site operation experience, transformers may have out-of-tolerance conditions during operation, which directly affects the accuracy of electric energy measurement, thereby affecting the fairness and accuracy of electricity trading, and serious cases may even threaten the safe operation of the power grid; monitor the transformer group Operation error is an effective measure to ensure the accuracy of the transformer and maintain the stable operation of the power system

In the existing error detection methods, the transformers operating under high-voltage conditions are usually verified by periodic power outage verification, but this method has many difficulties such as power outages affecting power grid operation, inability to accurately detect actual operating errors, and huge verification workload. However, live calibration is still in the process of technological development, and there are still deficiencies in safety and portability, and it has not been widely used.

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