Research on Mirror Closed Loop Testing Technology for Substation Control System Retrofit

Aiming at the problems of difficult outage approval for substation control system retrofits, short outage commissioning acceptance time, slow manual acceptance, and incomplete information verification, this paper proposes a mirror closed-loop testing system for substation control system retrofits. This system constructs mirror systems for equipment in operation, adopts horizontal mirror comparison and vertical closed-loop verification mechanisms, completes automatic testing of substation control system retrofits with a modular functional approach, and can automatically generate standardized test result reports. The designed mirror closed-loop testing system can move the manual verification process to the testing system for efficient execution, effectively shorten on-site outage time, eliminate verification risks in advance, and improve substation retrofit efficiency and quality.