Method for testing influence of distortion data on relay protection device

Abstract

The invention relates to a method for testing influence of distortion data on a relay protection device, comprising the following steps of: (1) constructing a dynamic simulation test system; (2) dynamically simulating an emulation system to generate sampling data needed by a normal running test, a fault test inside a protected area and a fault test outside the protected area and transmitting the sampling data to a fault oscillograph through an electronic mutual inductor merging unit; (3) transmitting the sampling data into a digital protection test device by the fault oscillograph, respectively adjusting the data of normal running, the fault inside the protected area and the fault outside the protected area and transmitting the adjusted data to the relay protection device and the fault oscillograph; and (4) analyzing the influence of the distortion data on the relay protection device according to action messages recorded in the relay protection device in the fault oscillograph. The invention provides the method for effectively testing the influence of the distortion data of the electronic mutual inductor for the relay protection device, ensures the reliable running of a digital transformer substation and has the characteristics of simple implementation method, accuracy and reliability.

Description

technical field [0001] The invention belongs to the field of smart grids, in particular to a test method for the influence of distorted data on relay protection devices. Background technique [0002] Digital substation is an important part of smart grid construction, which brings far-reaching influence and great changes to the automatic operation and management of substations, and is of great economic and technical significance. As the most important secondary equipment in the substation, the relay protection device has been widely concerned about its function and performance. With the adoption of electronic equipment in digital substations, especially the advantages of electronic transformers over electromagnetic transformers, It is bound to bring about the rapid development of relay protection technology. The characteristics and stability of the electronic transformer will have a certain impact on the relay protection device. For example, the electronic devices in the dat...

AI Technical Summary

Problems solved by technology

The characteristics and stability of the electronic transformer will have a certain impact on the relay protection device. For example, the electronic devices in the data acquisition and processing part of the electronic transformer may be distorted under the influence of factors such as interference. Under normal circumstances, the corresponding quality bit of the transformer merging unit is normal, and the relay protection device judges that the data is valid, resulting in protection malfunction, which affects the reliability of the digital substation

Therefore, it is necessary to test the influence of distortion data on relay protection devices before engineering application. However, there is no effective test method for the influence of distortion data on relay protection devices.

Images