Teleprotection: Enhancing Protection with Communications
Teleprotection is the use of communications for power system protection applications. The most common is transmission line protection. Teleprotection channels, sometimes referred to as pilot channels, coordinate between line protection relays. Important benefits include limiting tripping to faulted line section, high-speed simultaneous clearing for all internal line faults, preventing overtripping on external faults, and reducing transmission line and station damage.
Teleprotection can be achieved through a wide range of communications mediums. These include, Power Line Carrier (PLC), audio tone circuits, digital networks, fiber optic cables, microwave, wireless radio, and packet networks. Channels are commonly two-terminal but can be expanded to multiterminal applications, depending on the power system.
Featured Product: GARD 8000® and GARD Pro®
Together, these products provide an advanced communications platform designed specifically for protection applications. They offer the user a fully programmable system for Direct Transfer Trip, Permissive Transfer Trip, Blocking, Unblocking and Phase Comparison applications. One unique flexible platform handles analogue, digital, and Ethernet communications with multiple interfaces combined in one unit. The interfaces can be programmed together or independently, according to the needs of the application.
Features and Benefits
- Modular platform with wide range of functional modules and diverse communications options and fully customizable logic
- Eliminates the need for multiple devices but maintains redundancy requirements for critical applications
- One common platform for a wide range of protection and communications applications reduces the costs associated with maintaining multiple platforms of equipment
- Assures reliability, security, dependability, and low latency for real-time critical applications
