Our new generation of excitation systems offers users configurable control structures based on IEEE 421.5.
This enables us to implement brushless, static, and compounded excitation systems for synchronous machines in generator and motor operation on the grid or converter, at grid frequencies from 16.7 to 400 Hz. The excitation system (XD3S) is designed for operation on synchronous machines with medium to high excitation current or auxiliary excitation current requirements. The basic system consists of a control unit (SC1200) and one or more gate units (GU3006).
Several remote thyristor gate units (GU3006) can be operated for parallel thyristor bridge operation or to implement various redundancy scenarios.
Features
- Operating voltage: 24 V DC ±20%
- Control deviation: 0.25%
- Synchronization voltage: 3 x 800 V AC
- Early grid detection from: 8 V
- Suitable for: Synchronous machines
Operation
Parameterization is performed using the powerful Engineering Manager (EM3000), which is available as PC application software and is connected via the Ethernet service interface.
Operating modes
- Voltage control (PID)
- Excitation current control (PID)
- Uf controller / open loop operation
- Smooth switching between all operating modes
- Reactive power statics
- Active power stabilization
- Operating modes and setpoints controllable via galvanic inputs or Modbus
- Reactive power power factor control (PID) at machine or grid connection point
Limiting and additional functions
- Anchor current limitation for grid and short-circuit operation (AMZ with maximum current level)
- Reactive power statics, reactive current compensation control for parallel synchronous machines
- Underexcitation limitation, definition via straight line segments
- Excitation current limitation (AMZ with maximum current level)
- Active power stabilization PSS2A, B, C
- Overexcitation control, overshoot-free (soft start)
- Static voltage maintenance / reactive power provision according to VDE-AR-N 4110 / 4120:2018-11 (Section 10.2.2)
- U/f reduction
- Setpoint synchronization for redundant systems
- Grid synchronization
Machine monitoring and control
- Stator voltage monitoring UMZ, 3-stage
- Diode fault detection in brushless operation
- Stator current monitoring UMZ, 3-stage
Thyristor bridge monitoring
- Current amount
- Imbalance load
- Temperature
- Fuse monitoring
- Fan monitoring