A Real-time Acquisition System of High-Voltage Transformer Group Operation Status

Abstract

The invention discloses a real-time collection system for the running state of a high-voltage transformer group, which includes a synchronization module, a collection module, a combination module, and an output module; the synchronization module includes a Beidou / GPS receiving module and a synchronization control core module; the synchronization module receives Beidou / GPS signals It also provides PPS pulses and timing signals, and supports real-time synchronous acquisition among multiple acquisition systems; the acquisition module realizes A / D sampling and feature extraction of the secondary output electrical analog signals of multiple groups of transformers; the merge module integrates multi-channel The feature quantity extraction results are combined, and the absolute time is extracted from the Beidou / GPS timing signal; the output module is used to transmit the collection results to the local terminal and the remote terminal, and the results can be used for real-time evaluation of the operation error of the transformer group. The invention realizes synchronous, high-precision and real-time collection of operating state data of multiple sets of transformers in a power network, and provides a data basis for evaluating the operating errors of a group of transformers.

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.

Images