Our Customised Static Excitation Systems such as the DECS-400 are designed to control, protect and monitor visually all size, types and brand of synchronous generators or motors such as those found in Steam, Gas, Diesel or hydro power generation utilities.
An excellent choice for static excitation system is the DECS-400 is a microprocessor-based controller that provides excitation control, flexible logic control, and optional power system stabilization for synchronous machines in an integrated package.
The DECS-400 controller provides an analog output to control the firing of external bridge(s) and monitors machine parameters to control, limit, and protect the synchronous machine from operating beyond its capability limitations.
The optional power system stabilizer function is an IEEE-type PSS2A, dual input, “integral of accelerating power” stabilizer that provides supplementary damping for low-frequency local mode, inter area, and inter unit power system oscillations.
Main functions of the DECS-400 Static Excitation System includes:
Five Control Modes, with autotracking between modes
- Automatic Voltage Regulation (AVR)
- Field Current Regulation (FCR)
- Power Factor (PF)
- Field Voltage Regulation (FVR)
- Var Control
- 0.20% Voltage Regulation Accuracy
40 Standard Stability Settings
Time synchronization using IRIG or NTP (via Ethernet)
Power system stabilizer (PSS), dual input, integral of accelerating power (IEEE PSS2A/2B)
Customizable Stability Setting with two PID setting groups
Reactive Droop, Line Drop Compensation
Generator Voltage Soft-Start during Buildup
Autotracking with Optional Backup DECS-400
RS-485, Modbus™, RJ-45 Ethernet
Built-in limiting functions
- Overexcitation Limiters – Summing Point or Takeover Type (OEL)
- Underexcitation Limiters – 5 point user programmable or internally generated, summing point or takeover (UEL)
- Dual Slope Voltz/Hz Ratio or Underfrequency Limiter
- Stator Current Limiter (single phase or three phase)
Exciter Diode Failure (for brushless exciters)
Setup and initial operation are facilitated by BESTCOMS, which offers:
- real time monitoring test analysis
- flexible oscillography, trending
- expanded testing capabilities, including means for performing frequency response tests
- Metering – Two 4-20mA meter drivers, customer programmable
- Four Communication Ports
- Data Logging
Sequence of Events Recording, Trending, real time monitoring test analysis, and built-in frequency response test capabilities
UL Recognized, CSA certified, CE Compliant, GOST-R certified
If you are looking to purchase a customised static excitation system please give us a call.