The 110 and 220 kV lines of the main grid are protected by means of two primary protection schemes (two distance relays or a distance and a differential line relay) or a primary protection relay (distance relay) and a backup protection relay . The 110 and 220 kV lines of the main grid are protected by means of two primary protection schemes (two distance relays or a distance and a differential line relay) or a primary protection relay (distance relay) and a backup protection relay . Fingrid's application guideline for relay protection presents the operating principles of the relay protection in Fingrid's 110, 220 and 400 kV power networks and the requirements for operation of the protection systems of Fingrid customers (hereinafter referred to as 'customer'). The application. A relay protection solution has been explored for 110 kV high-load short-distance lines in this research, and its impact on the dynamic stability of the power system has been evaluated. Department of Electrotechnique, Power Engineering School Department of Electrotechnique, Power Engineering School. Generator protection covers: phase-to-phase short circuits in stator windings, stator ground faults, inter-turn short circuits in stator windings, external short circuits, symmetrical overload, stator overvoltage, single- and double-point grounding in the excitation circuit, and loss of excitation. Effective relay protection depends on. ABB's Control Room offering includes a comprehensive range of solutions designed to optimize the operator workspace for critical 24/7 processes across various industries. The control room is considered one of the most critical areas in any facility, impacting daily decision-making and overall. The invention discloses a 110kV line disconnection relay protection method for comparing voltages on two sides of a line, which fully utilizes the fault characteristics of PT secondary voltages of a power supply end and a load end 110kV bus of a transformer substation when the 110kV line is in.