Interoperability of Distribution Automation Terminals Based on IEC61850

At present, in the distribution automation system, the test of the power distribution terminal requires external input to the power distribution terminal through a tester simulation protection test. After the status of the power distribution terminal changes, upload the signal to the client (master station). The client compares the received signal with the local signal of the power distribution terminal, and artificially determines whether the communication behavior of the power distribution terminal is correct. It can also simulate multiple power distribution terminal information uploads through several avalanche tests to simply understand the network load and the signal is correct. rate. However, this test method has the following disadvantages: it is not possible to comprehensively test the communication capability of the client (master station); the correctness of the ICD model provided by the manufacturer can be verified only through the point test of the tester; the distribution automation cannot be fully understood Peak network communication load of the system. The IEC 61850-based power distribution terminal simulator designed and developed in this article makes up for the above shortcomings. It can simulate the external communication behavior of all power distribution terminals at the whole station and conduct comprehensive tests on power distribution terminal equipment, so as to better use IEC 61850 communication standard. In this paper, a simulation experiment is performed to set a fault in the section where load node 2 is located, set the remaining capacity of switch S1 to 450A, set the remaining capacity of switch S2 to 350A, and set the remaining capacity of switch S3 to 470A, and the modeling time is 1.85s. Contact switch power supply conditions. The power distribution terminal simulator runs on a computer, eliminating the need for testers and other equipment, which can reduce the workload of the staff and greatly shorten the project commissioning time.