Closed-Loop Test Scheme of Microcomputer Protection Based on Off-Line Simulation Software

This paper introduces a closed-loop test method of microcomputer protection based on off-line simulation software. The method obtains the sampling data of power system under various operating conditions by using off-line simulation software, utilizes the data formats obtained by the simulation software by using a special data format conversion tool, and obtains the real and synchronous electricity consumption by means of the digital-analog conversion device. On the basis of considering the setting of the protection device, the inherent action delay and the circuit breaker action delay, the closed-loop test can be realized by reasonably controlling the duration of various running states in the simulation software. This method can realize the test function similar to the real-time digital simulation system, has good flexibility, high precision and low cost, and is suitable for the digital simulation test in the situation where there is no real-time digital simulation system.