Triol AK06
Variable frequency drive for electric submersible pumps
Purpose:
Triol AK06 variable frequency drive (VFD) is intended to control and protect electric submersible pumping units (ESPU) with nominal power from 16 to 1450 kW. The Triol AK06 provides open-loop scalar control (V/f control) for induction or synchronous motors and sensorless control for brushless DC motors.
Main Features and Benefits:
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Features
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Benefits
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Periodic pump On-Off operation when the well inflow falls below the ESP rated capacity
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Increases overall oil production by adapting to actual oil well conditions
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Provision for integration into a higher-level automated control system to allow for communicating energy consumption and submersible telemetry data to a higher-level system.
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Increases effectiveness of the ESP system thanks in part to real-time process monitoring and analysis.
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Flying start
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Decreases ESP downtime and increases oil production. Increases ESP availability.
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Provisions for short-term pressure changes on the oil reservoir , “surging” and “shaking” modes
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Increases oil well inflow.
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Provisions for “swinging” and kick-start “swinging” to unlock ESP in case of mechanical jam
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Decreases ESP downtime. Increases availability.
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“Soft Start with Synchronization” holds output frequency for a preset time upon the start prior to its further increase
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Increases reliability of the ESP system.
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VFD maintains process parameters (pressure, oil level, pump vibration) and output current and motor speed within preset limits
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Increases reliability and effectiveness of the ESP system.
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Motor current optimization through automatic adjustment of output voltage to frequency ratio at any given frequency
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Boosts energy efficiency due to lower motor current.
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VFD and pump protection functions
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Increases reliability of the ESP system. Reduces maintenance costs. Longer life for the system.
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“Manual”, “Automatic”, or ‘Automatic with Preset Time” restart depending on whether the motor needs to restart automatically after a fault occurs or wait for operator’s command
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Decreases ESP downtime in case of automatic restart.
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VFD starts ESP after a preset time delay since power becomes available
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Increases reliability of the ESP system.
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On-site and remote (including LAN) control of process parameters
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Simplifies control and increases effectiveness of the ESP system.
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See also Triol AK06-ASPED and Triol AK06-***-2
Triol AK06 technical specifications
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Nominal output current
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100…3200 A
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Supply voltage
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3 x 380 V (- 50%, + 25%), 50/60 Hz (± 1%)
3 x 480 V (- 15%, + 10%), 50/60 Hz (± 1%)
3 x 690 V (- 15%, + 10%), 50/60 Hz (± 1%)
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Nominal output voltage
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3 x 0…380 V (± 2%)
3 x 0…480 V (± 2%)
3 x 0…690 V (± 2%)
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Output frequency
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0…80 Hz (± 0.1%) for induction and synchronous motors
0...500 Hz (± 0.1%) for brushless DC motors
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Overload current
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125% of nominal current for 300 seconds
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Efficiency
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> 95%
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Operating mode
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Continuous
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Insulation resistance
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> 20 MOhm
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Control system
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UMKA-03 controller
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Controller memory size
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8 MB (870000 records)
2 GB with SD memory card
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Interface
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RS 232; RS 485; CAN; USB
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Data exchange protocol
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Modbus RTU; CANopen
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Operating temperature
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- 60 °C … + 50 °C
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Protection level according to IEC 60529
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IP43
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Triol AK06 model range
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Model
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Nominal output current, A
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Active output power,
kW
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Full output power,
kVA
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Dimentions,
mm
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Triol АК06-100
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100
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55
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64
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950х1900х890
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Triol АК06-160
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160
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90
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106
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950х1900х890
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Triol АК06-250
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250
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132
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176
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950х1900х890
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Triol АК06-320
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320
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160
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182
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950х1900х890
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Triol АК06-400
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400
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200
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263
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950х1900х890
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Triol АК06-630
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630
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315
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414
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1300х1900х1050
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Triol АК06-800
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800
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400
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526
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1300х1900х1050
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Triol АК06-1К0
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1000
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500
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658
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1850х1990х1080
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Triol АК06-1К2
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1200
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600
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789
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2040х2000х1080
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Triol АК06-1К4
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1400
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700
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921
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2040х2000х1080
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Triol АК06-1К6
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1600
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800
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1053
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2040х2000х1080
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Triol АК06-2К0
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2000
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1000
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1316
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1850х1990х1080
(2 Cabinets)
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Triol АК06-2К5
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2500
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1250
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1644
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2040х2000х1080
(2 Cabinets)
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Triol АК06-3К2
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3200
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1600
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2106
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2040х2000х1080
(2 Cabinets)
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The Triol AK06 offers the following functions:
- Soft start and stop of the motor with preset acceleration and braking rate (Hz/s);
- “Manual”, “Automatic” or “Automatic with preset time” modes determine whether the motor starts automatically after a fault occurs or awaits the operator’s command;
- Flying start mode starts ESP when the forced counter-rotation is induced by the load on the pump (turbine rotation). The Triol AK06 smoothly reduces the shaft's rotation speed and then reverses it to the forward direction without the current overload. In oil extraction, this mode allows immediately starting the motor, rather than waiting for the oil to drain back into the pipe and for the turbine rotation to eventually stop gearing;
- “Current optimization” mode changes the output voltage to get the minimum full load current at fixed output frequency;
- Start and stop according to a preset time configuration;
- Local and distant operating parameter control;
- Change output frequency according to a preset time configuration;
- Operating the motor in field weakening region by raising the output frequency above nominal;
- Starting ESP after supply is delivered after a preset time;
- Maintaining a preset technological parameter (pressure, ESM current, vibration, liquid level, ESM load);
- Starting ESP in “swinging” mode; “kick start swinging” mode can be used to unblock ESP in the case of mechanical jamming;
- “Soft start with synchronization” holds a frequency for a preset time upon starting and then continues to start operation;
- Starting ESP in the “unjamming” mode delivers maximum torque at low frequency;
- Continuous monitoring of ESP isolation resistance and turning the motor off when isolation drops under a certain preset value;
The Triol AK06 protects ESPs from the following:
- High current;
- Underload;
- Overload;
- Low “cable – ESP chassis” insulation resistance;
- High ESP temperature (with submersible telemetry);
- Low base oil pressure (using submersible telemetry);
- High vibration level (using submersible telemetry); and
- High pipeline pressure (using contact pressure gauge).
Triol AK06-400 VFD. Front view
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