Detecting system and detecting method of digital transformer substation protecting loop

Abstract

The invention discloses a detecting system and a detecting method of a digital transformer substation protecting loop. The system comprises a control terminal device and a small signal outputting device which are connected wirelessly. The detecting method comprises the following steps: a protecting loop is connected, the communication state is checked automatically, the communication state is confirmed, parameter setup is carried out, output signals are transmitted synchronously, a protecting device takes action to transmit a trip signal to an intelligent operating box after receiving the signals; the small signal outputting device transmits the received trip signal to the control terminal device; and the control terminal device processes the signal so as to end the detection process. By using a wireless synchronization technology and by adopting the principal and subordinate arrangement, the data synchronization is realized for devices at different places, and the verification work of a complex loop such as a generator transformer and the like is solved effectively.

Description

technical field [0001] The invention relates to a detection system and a detection method for a protection circuit of a digital substation. Background technique [0002] With the digital substation put into operation, the inspection work of relay protection has undergone tremendous changes. The traditional microcomputer relay protection device is divided into three parts: data acquisition, logic and execution, while the relay protection device of the digital substation lowers the acquisition and execution part to the process layer, and the intelligent unit (IED) is only the logic part. placed in the spacer. What has changed accordingly is the inspection method of relay protection. The traditional inspection method is no longer suitable for digital substations. [0003] At present, digital substations are still in the stage of research and exploration, trial operation and accumulation of experience. Different digital substations have different composition methods, and their...

AI Technical Summary

Problems solved by technology

[0006] Neither of the above two methods can completely solve the inspection of the entire protection circuit, only the intelligent unit (IED) can be inspected. Others such as the merging unit and the intelligent operation box have no on-site inspection methods, and there is no way to complete the entire circuit.

However, protections with complex external circuits such as main transformers and bus differentials cannot be effectively inspected.

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