CHP (cogeneration)

• CHP generator unit protection and control
• Network and system protection at the grid connection point / PCC
• NA protection, EZA/EZE functions, Q(U), P(f), ROCOF and voltage/frequency monitoring
• Synchronization, parallel operation and grid decoupling
• Power Management, load sharing and island operation for multiple units
• Bus-tie logic, automatic load shedding and blackout recovery where provided by the system
• Block transformer, auxiliary transformer and connection cell protection
• Feeder cells and auxiliary supply protection
• Protection of auxiliary motors: pumps, fans, compressors and cooling systems
• DC supplies, batteries, chargers, trip/close supplies and DC monitoring
• Communication with SCADA/BMS/DCS systems and the grid operator
• Event, fault and disturbance recorder with COMTRADE analysis
• ARC protection in MV/LV switchgear, where provided by the project
• Distance protection 21 only where the plant takes over connection line protection
• Line differential protection 87L only for critical cable or line connections, where provided by the scheme

SYMAP^® Compact+ — compact IED for individual cells and grid connection

• Compact+ GC — Grid Code, NA/EZA/EZE functions, PCC metering, grid decoupling, synchronization and control layer on the AC interface
• Compact+ F1/F2 — simpler feeder and auxiliary cells with phase and earth-fault current measurement; F2 when additional Ug / residual voltage is required
• Compact+ F3 — cells with 3×U/Ug measurement, directional protection, voltage/frequency monitoring and optional 21 function when provided by the Order Code
• Compact+ F4 — more complex individual cells with multiple voltage systems, CT1/CT2, PT1/PT2/PT3, DCVM monitoring, sync-check 25 and advanced control logic when the required measurement inputs and options are provided

Classic SYMAP^® series — application variants for CHP system architecture

• SYMAP^® G — CHP generator unit protection and control
• SYMAP^® BCG / ECG — Power Management, parallel operation of multiple units, load sharing, bus-tie logic and island operation
• SYMAP^® T — transformer protection, including differential protection where provided
• SYMAP^® F — feeder, connection and auxiliary cell protection and control
• SYMAP^® M — auxiliary motor and drive protection
• SYMAP^® DC — DC supplies, batteries, chargers and monitoring of auxiliary DC lines
• SYMAP^® ARC — arc-flash detection and fast tripping in switchgear
• SYMAP^® D / LD — only where the CHP plant has a connection line or critical cable/line connection that requires distance 21 or line differential 87L