Description
Auxiliary supply: 24 V DC
Power consumption: ≤25 W
Real‑time control cycle: sub‑millisecond high‑speed sampling & calculation
Analog interfaces: multi‑channel CT/VT signal acquisition for generator voltage, current and excitation‑loop signals
Binary I/O: onboard digital input/output terminals for status collection and pulse‑trigger output
Communication interfaces: Dual 10/100 Mbps Ethernet, PROFIBUS‑DP interface; supports Modbus TCP, TCP/UDP, internal back‑plane bus for AC800PEC rack
Mounting mode: Standard rack‑plug‑in unit for excitation cabinet
Operating temperature: −20 ℃ ~ +70 ℃
Storage temperature: −40 ℃ ~ +85 ℃
Humidity: 5‑95 %RH non‑condensing
EMC compliance: IEC 61000‑4 series industrial electromagnetic compatibility standards
Dimension & weight: approx. 210 × 160 × 50 mm, weight about 1.5 kg
Certifications: CE, IEC‑61000 approval
Automatic generator voltage regulation, reactive‑power / power‑factor control, parallel‑unit reactive‑power distribution.
Full set of excitation‑limit functions: over‑excitation limit, under‑excitation limit, stator‑current limit, V/Hz limitation.
Excitation‑system internal fault monitoring, loss‑of‑excitation supervision, excitation‑over‑current protection logic.
High‑speed pulse‑trigger signal output to control thyristor rectifier bridge.
Acquisition of generator voltage, current, excitation‑loop analog quantities and cabinet binary status signals.
Sequence‑of‑event logging, internal fault recording and disturbance‑data storage.
Rich communication interfaces for connecting to plant DCS and upper‑monitoring system.
Hardware self‑diagnosis detects internal circuit faults and outputs alarm signals.
Configuration, parameter setting and commissioning are completed via UNITROL Configurator and Control Builder M engineering software.
Plug‑in installation inside excitation cabinet AC800PEC rack. Strictly separate high‑power power‑cables from weak‑signal wiring, ensure cabinet grounding resistance ≤4Ω. Auxiliary 24 V DC power supply must keep within rated range. After unit replacement, download complete excitation‑project configuration file. Perform excitation‑regulation closed‑loop simulation test, pulse‑trigger output inspection, analog‑channel calibration, binary‑I/O point‑to‑point test and communication verification with DCS. Confirm no hardware self‑diagnosis fault alarms before putting into service.
Core excitation control unit for synchronous generators of thermal‑power plants, hydropower plants and industrial self‑power stations, used for UNITROL series static excitation system retrofitting and maintenance.
- AC800PEC high‑speed real‑time controller dedicated for generator excitation regulation, high‑speed control cycle satisfies excitation‑system dynamic‑response requirements.
- Complete excitation‑regulation and excitation‑limit algorithm library, meets various grid‑code requirements for generator excitation control.
- Supports algorithm development based on MATLAB/Simulink, convenient for customized control‑logic development.
- Integrated multi‑group industrial communication interfaces, easy to connect with plant‑level DCS and monitoring system.
- Plug‑in rack‑mount mechanical structure, convenient for on‑site spare‑part replacement and maintenance.
- Industrial spare‑part for maintenance and retrofitting of ABB UNITROL excitation systems.
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