Alstom MV7306P21 frequency converte

Alstom MV7306P21 frequency converte

Technical specifications

（1） Electrical parameters

Power range: Supports 24-60Vdc, 48-150Vdc, 130-250Vdc or 100-250Vac, 50/60Hz. The fluctuation range of power supply voltage is ± 20% in DC and -20% to+10% in AC, with ripple not exceeding 12%. The power outage withstand time is 50ms

Load capacity: Different load ports (such as P125, P126, P127) can withstand different powers, generally up to<3W dc or<8VA ac, and the maximum load can reach<5W dc or<12VA ac (depending on the port).

（2） Protection setting range

Phase overcurrent protection (taking P126 as an example)

Setting range I>: No or Yes can be selected, the current setting range is 0.1 In -25 In, and the accuracy is 0.01 In

Delay type: DT or IDMT (including multiple curves such as IEC-STI, IEC_SI, etc.).

Trip delay: 0-150s, accuracy 0.01s

TMS (time multiplier setting): 0.025-1.5, accuracy 0.025.

Reset feature: DT or IDMT, RTMS (reset time multiplier setting) 0.025-1.5, accuracy 0.025.

TReset (return time): 0.00 s-100 s, accuracy 0.01 s

I>and I>>... I>>>can set interlocks, select No or Yes.

Zero sequence overcurrent protection (P125, P126&P127)

Zero sequence current fundamental frequency and zero sequence voltage fundamental frequency monitoring.

Minimum operating zero sequence voltage: 1V (Uen: 57-130V); 3V（Uen: 220 - 480V）。

High sensitivity current setting (Cortec code P12-C-XX): Ie>range 0.002 Ien-1 Ien, accuracy 0.001 Ien, etc. (different sensitivities correspond to different ranges and accuracies).

Delay type, trip delay TMS、 The reset characteristics and other settings are similar to phase overcurrent protection.

Sensitivity angle (0 ° -359 °, accuracy 1 °) and trip zone (10 ° -170 °, accuracy 1 °) can be set.

Installation Guide

Installation environment requirements: The equipment should be installed in a dry, well ventilated environment, avoiding high temperature, high humidity, and strong electromagnetic interference areas. The recommended ambient temperature is within [specific temperature range], and the relative humidity should not exceed [specific humidity value].

Installation steps

Install the wiring board firmly onto the DIN rail, ensuring a secure installation and avoiding looseness.

Secure the interface unit and I/O module to the wiring board with bolts, paying attention to the correct installation direction and tightening the bolts to the specified torque.

Connect all on-site data wiring to ensure correct and secure connections, and avoid issues such as virtual connections and short circuits. When wiring, refer to the wiring diagram for operation.

Grounding requirements: The equipment casing must be reliably grounded, and the grounding resistance should be less than [specific resistance value] to ensure the safe operation and anti-interference ability of the equipment.

Operation Guide

Power on process: After checking the equipment wiring and installation, connect the auxiliary power supply, and the power indicator light should light up normally. Wait for the device self-test to complete. If any abnormalities are found during the self-test process, the corresponding fault indicator light will light up.

Human machine interface operation: Parameter settings, status monitoring, and other operations can be performed through the human machine interface. Voltage and other parameters can be set in the Configuration/General menu options, such as setting the voltage to 2Vpn+Vr (depending on actual needs).

Common operation examples: To set the phase current protection threshold, enter the corresponding protection setting menu, select the threshold type (such as fixed time limit, inverse time limit, etc.), set the setting value and other related parameters (such as trip delay, etc.).

Maintenance and upkeep

Daily inspection: Check the appearance of the equipment daily for any damage or deformation, ensure the status of the indicator lights is normal, and check for any abnormal sounds or odors. Regularly check whether the wiring is loose, and tighten it promptly if there is any looseness.

Regular maintenance: Conduct comprehensive maintenance every [specific time period], including cleaning the surface and internal dust of the equipment, and checking whether the components on the circuit board are damaged or show signs of aging. Perform functional testing on the equipment, such as phase current protection testing, phase voltage protection testing, etc., to ensure that all functions of the equipment are normal.

Troubleshooting and handling: If the equipment malfunctions, troubleshooting can be carried out based on the fault indicator light and human-machine interface prompt information. If an overcurrent fault occurs, check whether the load is overloaded and whether the protection setting value is reasonable. The common faults and their solutions are as follows:

Power failure: Check if the power input is normal, if the fuse is blown, and if the power module is damaged.

Communication failure: Check if the communication line connection is normal and if the communication protocol settings are correct.

Protection action: Analyze the reasons for the protection action, such as overcurrent, overvoltage, etc., and reset the protection after troubleshooting.

Precautions

It is strictly prohibited to perform dangerous operations such as plugging and unplugging modules while the equipment is running, in order to avoid equipment damage or electric shock to personnel.

When setting parameters, be careful to avoid incorrect settings that may cause abnormal device operation. After modifying important parameters, necessary testing and verification are required.

Equipment maintenance should be carried out by professionals. Non professionals are not allowed to disassemble the equipment without authorization to avoid irreparable damage.

Product positioning and core advantages

positioning

MV7000 is a water-cooled medium voltage inverter launched by GE, suitable for power conversion scenarios in the fields of oil and gas, ships, heavy industry, etc. It supports 3-81MW power output, with a maximum output voltage of 13kV, high reliability, high power density, and flexible configuration capability.

Core advantages

Leading power density: Using pressure bonded IGBT (PPI) technology, only 18 IGBTs can achieve 15MW output, with a power density of 1.5MVA/m ³ and compact equipment size (such as MV7306-3L with a width of only 4400mm).

High reliability: With a cumulative operation of over 14 million hours and an installed capacity of over 15GW, it supports N+1 redundancy design and can continuously conduct in case of faults, reducing downtime.

Flexible configuration: Provides two rectifier configurations: diode front end (DFE) and active front end (AFE), supporting 12/24/36 pulse harmonic control and complying with IEEE 519 standard without the need for additional filters.

Energy saving and efficient: Four quadrant operation supports energy feedback to the power grid, and the common DC bus system can recover braking energy. In AFE mode, the power factor reaches 1, and the system efficiency is as high as 99%.

Key technical characteristics

hardware design

Modular structure: The inverter cabinet adopts double-sided cooled IGBT modules, and the control hardware supports drawer style installation, making maintenance convenient (forward access design).

Transformer free design: AFE configuration does not require an input transformer, saving costs and space, and improving efficiency.

Cooling system: Integrated water cooling system, supporting redundant pump configuration, suitable for harsh environments such as ships and high vibration scenarios.

control and protection

Vector control: Equipped with Power Electronics Controller (PECe) as standard, it supports flux vector control. The speed adjustment accuracy is less than 0.5% without an encoder and less than 0.1% with an encoder.

Protection function: It has overcurrent, overvoltage, undervoltage, and motor stalling protection, supports voltage drop ride through of the power grid (continuous operation at a minimum of 70% rated voltage), and enables rapid start-up of rotating loads.

Communication protocol: Standard interfaces such as Profinet, Modbus, Ethercat, etc., supporting remote monitoring (Visor Connect system).

Harmonics and Energy Efficiency

Low harmonic: DFE configuration supports 12/24/36 pulse rectification, AFE configuration can achieve sine wave input, with harmonic content lower than IEEE 519 standard.

Energy recovery: During four quadrant operation, energy can be fed back to the grid, reducing cable losses and supporting reactive power compensation.

Application scenarios and industry adaptation

major industries

Oil and gas: liquefied natural gas (eLNG) trains, injection compressors, multiphase pumps, pipeline compressors.

Ships: cruise ships, LNG carriers, offshore drilling platforms, naval support vessels.

Heavy industry: metal rolling mill, testing bench, water pump, mine hoist, wind turbine, STATCOM (Static Var Compensator).

Typical applications

High precision control scenarios: such as steel rolling flatness control and precise power supply for offshore oil and gas exploration.

Energy saving scenario: Variable frequency speed regulation of water pumps and fans, replacing traditional mechanical couplings, with an energy-saving rate of over 30%.

Renewable energy: frequency conversion of wind farm inverters and energy storage systems.