The SPS-SPECIAL PROTECTION PANEL is a protective system composed of a series of devices such as computers, communication transmission equipment, and protective devices to prevent widespread fault propagation in the power grid, including grid separation, generator shutdown, cascading disconnection of transmission lines, etc.

Its installation objectives are to enhance excessive stabilization (executing actions like generator shutdown and output reduction during major power plant system failures to improve excessive stability), improve voltage instability (conducting load shedding, transmission/substation equipment shutdown, etc., to prevent voltage collapse in metropolitan and regional interconnection system failures), and relieve overloads (performing load shedding, transmission/substation equipment shutdown, generator shutdown, etc., to alleviate overload in regional interconnection system failures).

Functionally, it involves load shedding during abnormal frequency deviation, load shedding during abnormal voltage deviation, partial generator shutdown during generator deviation, grid disconnection during system deviation, grid and load disconnection during overloads, voltage adjustment of generators during abnormal overvoltage situations, and reactor insertion. These functionalities are directly related to grid stabilization and the prevention of widespread blackouts, necessitating reliable functions in the protective system.

The protective elements of the SPS-SPECIAL PROTECTION SYSTEM include protection methods such as current detection, low voltage detection, overvoltage detection, frequency detection, etc., combined with external signal inputs (received from other substations, etc.), allowing the opening state of circuit breakers to be transmitted to other substations. The system is designed to be implemented flexibly in accordance with the operating methods of the power exchange under any circumstances.

The protective relays applied in the SPS-SPECIAL PROTECTION PANEL utilize advanced technology, such as Siemens' 7SJ8x, to ensure the reliability of protection functions and flexible implementation through CFC logic. These relays integrate accumulated production technology in protective relay manufacturing, noise immunity, insulation strength, stable grounding, durability, layout, etc., along with specialized personnel, thereby producing and supplying more reliable products.