The Technology of Testing Protection Devices in a Cycle According to the Dommel Algorithm Based on the Simulation of Elements of Electrical Networks in a Real-Time Controller

This article is devoted to the construction of a hardware-software solution for testing relay protection devices in a closed Dommel loop [1]. A flexible solution is proposed for the use of hardware OMICRON CMC-356 [2] together with the developed software that implements the models of electrical network elements in the Real-time controller NI cRio-9025 [3] using LabVIEW Real-Time and LabVIEW FPGA. An algorithm for the functioning of programs and devices for the implementation of a closed loop testing of triggering devices of digital relay protection is proposed. A practical experiment was carried out to simulate a short circuit on a power transmission line in real time on a model and to generate the obtained model data by the OMICRON CMC-356 device.