DEIF AGC-4 Mk II Generator Controller Depth Configuration Guide

DEIF AGC-4 Mk II Generator Controller Advanced Application and System Configuration Guide

In the fields of diesel generator sets, ship electric propulsion, and distributed energy, the DEIF AGC-4 Mk II, as a new generation generator controller, has upgraded its hardware platform based on the standard AGC-4 and expanded its PMS lite, CANshare digital load distribution, enhanced analog input/output, and more flexible M-Logic logic programming capabilities. This controller supports multiple topologies such as single machine, multi machine parallel connection, grid connection, and islanding operation. It has built-in ANSI standard protection, PID regulation, synchronization, and power management functions, which can meet the control needs from emergency backup power to complex microgrid systems. This article is based on the AGC-4 Mk II Designer Manual (software version 6.1.1), which systematically outlines its core functional architecture, configuration process, advanced additional functions, and typical applications, providing comprehensive technical references for power system design and on-site debugging personnel.

Product positioning and major upgrades

The AGC-4 Mk II belongs to the new generation product of the DEIF Multi line 2 platform. Compared with the previous generation AGC-4, its hardware performance has been improved and it supports a richer combination of options. Its core applications include:

Automatic mains fault (AMF): includes two modes: reverse synchronization and no reverse synchronization.

Island operation: Independently loaded, started and stopped according to digital or timed instructions.

Fixed power/base load: When connected to the grid, it outputs constant active power and participates in the frequency support of the power grid.

Peak Shaving: Automatically adjust the output of the unit based on the imported power of the mains.

Load Takeover: Smooth transfer of mains load to the unit to achieve independent power supply.

Mains Power Export: To output or input constant power to the grid.

At the same time, the controller supports power management (option G5, including generators, busbars, and mains controllers) and extended power management (option G7, including group controllers and power plant controllers), and can build large-scale power plants with up to 32 units. In addition, the addition of PMS Lite lightweight power management system (supporting up to 127 generators, automatically assigning IDs through CAN bus) and CANshare digital load distribution (without the need for a master station, automatically sharing active/reactive power) greatly simplifies the configuration and debugging of multi machine parallel connection.

Communicate measurement configuration and rated parameters

The voltage direct input range of the AGC-4 Mk II is 100-690V AC, and the three-phase, phase separated, or single-phase measurement modes can be selected through menu 9130. In phase separation mode, the controller displays the phase voltages of L1 and L3. The voltage of the L1-L3 line is 240V, but the alarm setting is based on the phase neutral voltage (120V). It should be noted that parameters 1201 and 1202 are set to the phase neutral type. In single-phase mode, only one phase and neutral point are measured.

Reactive power calculation method (parameter 9132): The historical version calculates reactive power based on phase to phase voltage and current. If there is a significant voltage imbalance in the system, it can be switched to based on phase to phase voltage and current (Q via U N Ph and I) to improve accuracy. If option A20 (IEEE 1547-2018 Grid Protection) is activated, this parameter will automatically switch.

The four sets of rated parameter sets (6001~6036) support dynamic switching through digital input, AOP or M-Logic to adapt to different voltage/frequency requirements, especially suitable for mobile power stations or seasonal adjustments. There are two sets of rated parameters for the busbar (6051~6063). If there is no busbar PT, 6054 can be set to "BB Unom=G Unom". Voltage scaling (9030) can be set to 100-25000V by default. If the voltage exceeds the limit, it needs to be modified with the master password.

Standard Protection Function (ANSI)

All protections are time limited and can independently set the starting value, delay, output relay, and fail class. The main protection list is basically the same as AGC-4, but with more flexibility added:

Reverse power (32): 2 segments, setting range -50%~0%, delay 0.1~30s.

Overload (32 inverse time limit): 5 segments, based on power percentage.

Overcurrent (50/51): 6-stage fixed time limit+inverse time limit, supporting voltage dependence (51V).

Overvoltage/undervoltage (59/27): Generator 2-stage overvoltage, 3-stage undervoltage; Bus 4-section overvoltage, 5-section undervoltage, supports phase to phase or phase to medium selection (1201/1202).

Over/Under Frequency (81): Generator 3 sections, Bus 5 sections.

Voltage/current imbalance (60): detects three-phase asymmetry.

Demagnetization/overexcitation (40/32RV): Prevent phase instability based on reactive power limitations.

Non essential load trip (NEL): There are 3 groups in total, and the secondary load is cut off according to the current, frequency, or power threshold.