Triol AK06 - *** - 2

       Variable frequency drive with an active rectifier for electric submersible pumps. The drive series is made in compliance with Directive 2006/95/ЕС «Low Voltage Directives» and Directive 2004/108/ЕС «Electromagnetic Compatibility».

General Description


       Purpose

       The design of the Triol AK06-***-2 with active rectifier is in compliance with EC standards.

       Triol AK06-***-2 variable frequency drive (VFD) with active rectifier is intended to control and protect electric submersible pumping units (ESPU) with a nominal power from 50 to 200 kW. The Triol AK06 with active rectifier provides open-loop scalar control (V/f control) for induction (asynchronous) motors and sensorless control for brushless DC motors.

 

       Main features and Benefits:

Features

Benefits

EMC filter which reduces the radio frequency harmonics generated to the network

The drive is friendly to a network, reducing voltage harmonic distortion in the network, which protects sensitive equipment connected to the same supply.

Sinusoidal input current with a total harmonic distortion less than 5%

Active power factor correction:
Power factor is more than 98%

Allows to save extra electicity.

Regenerate excess power back to the grid:
When the motor is braking, excess power is fed back to the network

Periodic pump On-Off operation when the well inflow falls below the ESP rated capacity

Increases overall oil production by adapting to actual oil well conditions.

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.

Increases effectiveness of the ESP system thanks in part to real-time process monitoring and analysis.

 Flying start

Decreases ESP downtime and increases oil production. Increases ESP availability.

Provisions for short-term pressure changes on the oil reservoir , “surging” and “shaking” modes

Increases oil well inflow.

Provisions for “swinging” and kick-start “swinging” to unlock  ESP in case of mechanical jam

Decreases ESP downtime. Increases availability.

“Soft Start with Synchronization” holds output frequency for a preset time upon the start prior to its further increase

Increases reliability of the ESP system.

VFD maintains process parameters  (pressure, oil level, pump vibration) and output current and motor speed within preset limits

Increases reliability and effectiveness of the ESP system.  

Motor current optimization through automatic adjustment of output voltage to frequency ratio at any given frequency

Boosts energy efficiency due to lower motor current.

VFD and pump protection functions

Increases reliability of the ESP system. Reduces maintenance costs. Longer life for the system.

“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

Decreases ESP downtime in case of automatic restart.

VFD starts ESP after a preset time delay since power becomes available

Increases reliability of the ESP system.

On-site and remote (including LAN) control of process parameters

Simplifies control and increases effectiveness of the ESP system.

Specifications


Triol AK06-***-2 technical specifications

Nominal output current

100…800 A

Supply voltage

3 x 500 V (- 50%, + 25%), 50/60 Hz (± 2%)

Nominal output voltage

3 x 0…500 V (± 2%)

Output frequency

0…80 Hz for asynchronous motors (± 0.1%)

0…500 Hz for brushless DC motors (± 0.1%)

Overload current

125 % of nominal current for 300 seconds

Efficiency

> 93 %

Total harmonic distortion in input current

<  5 %

Operating mode

Continuous

Insulation resistance

> 20 MOhm

Control system

UMKA-03 controller

Controller memory size

8 MB (870000 records)

2 GB with SD memory card

 

Interface

RS 232; RS 485; CAN; USB

Data exchange protocol

Modbus RTU; CANopen

Operating temperature

- 30 °C … + 50 °C

Protection level according to IEC 60529

IP43

 

Triol AK06-***-2 model range

Model

Nominal output current, A

Active output power,

kW

Full output power,

kVA

Dimentions,

mm

 Triol АК06-100-2

100

72

86

1350х1500х1000

 Triol АК06-160-2

160

116

138

1350х1600х1000

 Triol АК06-250-2

250

180

216

1400х1600х1120

 

 

Functionality


       The Triol AK06-***-2 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;
  • “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, current, vibration);
  • 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-***-2 protects ESPs from the following:

  • Short circuit 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); 
  • High pipeline pressure (using contact pressure gauge);
  • ESM current unbalance; and
  • Start while turbine rotation is present.

 

Images

 

Triol AK06-250-2. Front view

 
AK06-***-2

Triol AK06-***-2 VFD

This is a network friendly variable frequency drive made in compliance with Directive 2006/95/ЕС «Low Voltage Directives» and Directive 2004/108/ЕС «Electromagnetic Compatibility».