ABB UNITROL ® 1000 series excitation regulator

Product model and hardware composition

UNITROL 1000-7: Basic model, maximum continuous excitation output of 7A, aimed at synchronous motor manufacturers and system integrators who pursue low cost.

UNITROL 1000-15: Core controller body, maximum continuous excitation DC output of 15 A; power unit supports AC or DC power supply; Comes with a local human-machine panel; Can run independently.

UNITROL 1000-PM40: Independent IGBT power expansion module; Communicating with the 1000-15 controller via the CAN-Bus bus, plug and play, the controller automatically configures PM40 without the need for additional debugging; The combination of the two is called UNITOL 1000-40, which increases the maximum continuous excitation current to 40 A and is suitable for retrofitting old DC excitation units for use in scenarios with excitation currents of 15-40 A.

The PM40 panel LED indicator displays critical operating status.

Typical application wiring scenarios

Parallel excitation (configurable short-circuit enhancement compound): Directly powered by the machine end, supporting external short-circuit compensation.

Redundant dual regulator configuration for PMG permanent magnet generator power supply: Two UNITROL 1000-15 units form a 100% redundant excitation system, with power provided by the permanent magnet generator PMG.

Old unit renovation: Replace traditional DC excitation machine: 1000-15+PM40 (UNITROL-40), upgrade and renovate old analog and mechanical voltage regulators.

UNITROL 1000-15 Function List

Standard Built in Functions (BASIC)

Voltage PID regulation, power factor cos φ PID regulation, reactive current PID regulation, excitation current PI manual regulation;

Output voltage testing control, internal digital setpoint; Non disruptive switching between various working modes;

Soft start function; Reactive current compensation under grid connected conditions; V/Hz limit;

Minimum excitation current limit; Three stage delay maximum excitation current limit (with temperature correlation);

Under under excitation conditions, reactive power limitation is achieved based on active power; Stator voltage limitation; Stator current limitation (temperature dependent);

Multi machine parallel reactive power balancing regulation: RS485 interface, supporting up to 32 units for parallel reactive power leveling;

Pre matching of voltage before grid connection (with the help of synchronous devices for voltage regulation);

Modbus RTU communication (RS232/RS485);

Undervoltage detection can trigger external short-circuit enhancement (compound excitation);

Built in step testing function for given values; Complete alarm and trip signal output.

Optional authorization/option functions

Automatic synchronization and Synchrocheck synchronization check function (built-in synchronization logic in the regulator);

Rotating diode fault monitoring;

IEEE 2A/2B standard power system stabilizer PSS;

Redundant system enhanced monitoring (PT voltage circuit monitoring);

CAN Bus setpoint tracking, used for dual machine redundancy;

Redundant regulator standby mode.

I/O interface

All terminals of UNITOL 1000-15 are arranged at the bottom of the equipment:

4-channel digital input;

4-channel reconfigurable digital output (can also be set as digital input);

3 analog inputs;

2-channel analog output;

RS232: Connect to the CMT 1000 laptop debugging software;

RS485: Modbus RTU communication/multi machine parallel reactive power balancing;

CAN-Bus: Docking with PM40 power module for redundant system data exchange.

Human Machine Interaction HMI

Local panel

The device comes with 4 buttons and a backlit LCD display, allowing all operations to be completed without the need for a laptop

I/O port configuration;

Select the display screen to show the measurement quantity;

Parameter setting modification;

Real time monitoring of operational status.

CMT 1000 PC Debugging Software (Windows Platform)

Debugging and maintenance tools, core capabilities:

Read, write, and configure all parameters;

Power angle/P-Q limit graphic display, visually viewing the working point of the limiter;

Oscilloscope function: can select 4 signal graphics for recording; A total of 20 channels were recorded with a sampling resolution of 50ms;

Export and save numerical data for post fault analysis.

System delivery form

ABB provides a complete pre testing system for the factory, with three options:

Single channel system: installed with a complete set of base plates, used for small and medium-sized water turbines, diesel synchronous generators, and can also be used for synchronous motor excitation.

Dual channel 100% redundant system: for situations with high requirements for reliability and availability.

Complete small cabinet set: The entire excitation system is integrated into an independent switchgear, including excitation switches, interface relays, transmitters, fuses, and all other components; Suitable for projects where the existing cabinet space is insufficient on site.

Key technical parameters

UNITROL 1000‑15

Auxiliary power supply: three-phase AC 9-250 V; single-phase AC 50-250 V; DC 18-300 V; maximum power consumption 25 W; withstand voltage 2 kV.

Power unit supply: single-phase/three-phase AC 0-250 V/DC 0-300 V, frequency 40-600 Hz; withstand voltage 2 kV.

Excitation output: continuous DC 15   A;>50   ℃ environmental current derating 1   A/K; Short term overload: maximum 30 A for 10 seconds; maximum 20 A for 4 minutes.

Built in 24 VDC auxiliary source, with a maximum output of 300 mA.

Measurement input: The maximum three-phase voltage of the generator is 250   V; the single-phase current of the generator is 1   A; the maximum single-phase voltage of the power grid is 150   V; the measurement frequency is 10-100   Hz.

Analog I/O: ± 10   V range, input impedance 100   k Ω; supports external potentiometer reference output.

Voltage regulation accuracy:<0.1%.

Environmental conditions: operating temperature 0-60 ℃; Storage -20~+75   ℃; Meet EN 61000-6-2/EN 61000-6-4 electromagnetic compatibility; Protection level IP20; The total weight of the machine is 5kg.

UNITROL 1000-PM40 power module

Power supply is the same as 1000-15;

When using three-phase AC/DC power supply: continuous excitation output of 40   A DC; 10 seconds short-term 80 A; 4 minutes short-term 50 A;

The output capability of single-phase AC power supply decreases; Protection IP20; Plug and play through CAN bus and 1000-15 controller.