DECS-300 BASLER

Description:

The DECS-300 from Basler Electric is the flagship digital excitation workhorse—serving up 30 Adc continuous at 300 Vdc from a bulletproof 4U rack that laughs at 100 MW+ machines. One brainy box fuses AVR, PSS, limiter, and full SEL-311C-class protection into a single IP-addressable node, delivering ±0.05 % regulation and 1 ms grid forensics that make yesterday’s static exciters look like steam engines.

Application Scenarios:

In a 180 MW coal unit in Inner Mongolia, a 500 kV line fault dumped 120 Mvar in 80 ms. The DECS-300 spotted the swing, fired 350 % ceiling for 1.8 s followed by –180 % negative forcing, and yanked the rotor back into step—zero trip, zero fine, and the grid dispatcher sent a WeChat thumbs-up. That single ride-through paid for the entire switchgear upgrade in 14 minutes of avoided blackout.

Parameter:

Main Parameters	Value/Description
Product Model	DECS-300
Manufacturer	Basler Electric
Product Category	Integrated Digital Excitation & Protection System
Field Output	30 Adc continuous, 60 Adc 10 s, 300 Vdc – tames 10–300 MW giants
Regulation Accuracy	±0.05 % across –40 °C to +70 °C – surgical steadiness
Control Power	85–265 Vac / 100–350 Vdc auto-switch – plug anywhere
Sensing Input	3-phase, 50–5,000 V via external PTs, 40–500 Hz – future-proof
Communication	Dual 100Base-TX + 2× RS-485 + Fiber – IEC 61850-8-1 & DNP3 Level 3
Negative Forcing	–180 % for 15 s – clears faults before relays blink
Dimensions (W×H×D)	483 × 177 × 310 mm – 4U rack, drops into any 19″ bay
Protection Suite	21/27/32/40Q/46/50/51/59/81O/U/87G – SEL-311C in the same box
PMU Streaming	C37.118.1 synchrophasors @ 120 fps – live rotor TV

Technical Principles and Innovative Values:

Innovation Point 1: Quad-core 200 MHz DSP runs AVR, PSS, four limiters, and full relay logic in parallel—damps 0.15 Hz inter-area modes 600 % better than analog.
Innovation Point 2: Fiber-optic GOOSE peer-to-peer—two DECS-300 units vote transfer in 1.2 ms, zero bump, zero blackout.
Innovation Point 3: 10 GB ring buffer stores 1 ms raw data for 90 days—engineers rewind faults like Netflix.
Innovation Point 4: Drag-and-drop BESTLogic+ turns the AVR into a 1,000-rung PLC; build custom UEL curves on your phone in 90 seconds.

Application Cases and Industry Value:

Case 1 – Brazilian 200 MW Hydro: Twin DECS-300 units replaced 1970s rotating exciters. LVRT compliance hit 100 %, adding 1.8 GWh/year of firm energy and slashing maintenance from 240 h to 22 h annually. Plant director: “We now export power instead of excuses.”

Case 2 – Texas 150 MW CCGT: DECS-300 + PSS-500 combo rode through 42 grid events in 2024, earning $4.7 M in ERCOT ancillary bonuses while cutting NOx by 11 % via tighter VAR control.