DEIF DELOMATIC 3 Generator Set Control System

DEIF DELOMATIC 3 Generator Set Control System

In the field of generator automation control, the flexibility, reliability, and scalability of the system are the three core elements that users are concerned about. The DELOMATIC 3 multifunctional control system launched by DEIF provides a customized solution for ship power plants, land-based power plants, and cogeneration facilities with its modular design concept and powerful communication capabilities. This article is based on official technical data and provides a deep analysis of the system architecture, core modules, communication network, and technical specifications of DELOMATIC 3, helping engineers and technicians fully understand the unique value of this classic control platform.

Chapter 1 System Overview and Architecture Design

1.1 System positioning

DELOMATIC 3 is a powerful multifunctional system designed specifically for the control and protection of generator sets. It not only covers the basic functions of traditional generator control, but also integrates many advanced features, especially suitable for application scenarios with high requirements for distributed power control. The design philosophy of the system emphasizes "exactly meeting user needs", providing a complete functional package from basic protection to complex parallel control through flexible combination configuration.

This system can be widely applied to various types of power plants:

Ship power station: meets the requirements of classification societies and adapts to harsh marine environments.

Land based power station: used as a primary or backup power source to ensure power supply.

Local cogeneration: achieving cascade utilization of energy and improving overall efficiency.

Combined thermal power plant: generates electricity while providing heating, optimizing the energy structure.

1.2 Core Architecture: DGU and CP

The DELOMATIC 3 system consists of two core components:

DEIF Generator Unit (DGU)

DGU is the control core of the system, with one DGU configured for each generator set. It is a module assembly installed on a standard rack, with different functional modules inserted according to specific application requirements. DGU independently completes all control, measurement, and protection tasks for the generator set, and can work normally even without the higher-level system, ensuring the distribution and reliability of control.

Control Panel (CP)

CP, as a human-computer interaction interface, is a subordinate unit of DGU. Each DGU can connect up to 3 control panels, distributed in different operating positions for easy local monitoring. The subordinate design of CP means that even if the control panel malfunctions or disconnects, all settings and automatic control functions within the DGU remain valid and will not affect the normal operation of the generator set. The core functions of CP include:

Alarm display: Display all alarm information on the LCD screen.

Parameter adjustment: View and modify the internal parameter settings of DGU.

Data display: Display both measured and calculated operational data.

Status indication: 16 LED indicator lights are used to quickly display status and alarms.

Instrument interface: Supports connecting up to 16 analog instruments.

1.3 System Communication: ARC net Network

All communication between DGUs, as well as between DGUs and their affiliated CPs, is implemented through an independent ARC net network. ARC net is a token ring LAN technology with high real-time and deterministic characteristics, which is very suitable for industrial control scenarios.

Network characteristics:

Topology structure: Adopting a bus type structure, there must be only one starting point and one ending point, and parallel branch lines are not allowed.

Maximum capacity: A maximum of 8 DGUs (i.e. 8 generator sets) and their corresponding 24 control panels (up to 3 CPs per DGU) can be operated on an ARC net network.

Scalability: The network can also be connected to other terminal devices, such as higher-level alarm systems or graphical monitoring systems.

Transmission medium: RG-62 A/U coaxial cable is used, with an impedance of 93 ohms and a transmission rate of 2.5 Mbit/s.

Interference suppression: A ferrite magnetic ring must be installed approximately 0.1 meters before and after each BNC connector to reduce electromagnetic interference.

Terminal matching: Terminal resistors must be installed at both ends of the network to prevent signal reflection.

Transmission distance: Without repeaters, the maximum network length can reach 300 meters, and the minimum distance between nodes is 1.8 meters.

This specialized communication network design ensures real-time and reliable transmission of key data such as load distribution and synchronization instructions between units in complex operating conditions such as multi machine parallel connection.

Chapter 2 Detailed Explanation of Core Modules

The modular essence of the DELOMATIC 3 system lies in its rich library of functional modules. Each DGU rack can be combined and installed with different modules as needed to achieve customized functionality. All modules use pluggable terminals for easy installation and maintenance.

2.1 PSM-1 power module

PSM-1 provides working power to all other DELOMATIC modules within the DGU. It is worth noting that some special modules may require independent external power supply for safety reasons. Each DGU rack must be equipped with only one PSM-1 module.

2.2 CM-2 Control Module

CM-2 is the brain of DGU. It executes all core control logic based on pre installed application software programs, coordinates the work of various modules, and manages data exchange through the ARC net network. Each DGU must and can only be configured with one CM-2 module.

2.3 IPM-1 Input Module

IPM-1 is a 16 channel universal input module. Each channel can be configured through software as current input, voltage input, or binary switch input, greatly enhancing the module's versatility and flexibility, and can adapt to various types of sensor signals on site. Up to 8 IPM-1 modules can be installed in a DGU, providing up to 128 configurable input channels.

2.4 OPM-1 output module

OPM-1 is a 16 channel relay output module used to drive external actuators, indicator lights, or alarms. Each channel is a relay dry contact output with high reliability. Up to 8 OPM-1 modules can be installed in a DGU, providing up to 128 digital outputs.

2.5 AOM-1 Analog Output Module

AOM-1 is an 8-channel analog output module. Each channel can be independently configured for bipolar or unipolar output, and can choose voltage or current signal modes (such as typical 0-10V or 4-20mA). This enables DGU to output control signals to external speed controllers, AVRs, or other analog control devices. Up to 8 AOM-1 modules can be installed in one DGU.

2.6 CRM-1 Current Relay Module

CRM-1 is a dedicated protection module that can achieve three different protection functions according to configuration:

Short circuit protection module

Ground fault current protection module

Differential current protection module (used for differential protection of generators or transformers)

This multifunctional design enables it to flexibly respond to different protection requirements, with a maximum of 4 CRM-1 modules installed in one DGU.

2.7 SCM-1 Synchronization and Measurement Module (Generator specific)

SCM-1 is the core multifunctional module for generator control, integrating the vast majority of key functions required for generator control

Generator protection: Built in comprehensive generator electrical protection function.

Circuit breaker control: Implement the closing and opening control of the generator outlet circuit breaker.

Three phase electrical measurement: high-precision measurement of all three-phase electrical parameters of the generator (voltage, current, power, frequency, power factor, etc.).

Precision synchronizer: Equipped with a high-precision automatic synchronizer, it can detect the voltage difference, frequency difference, and phase angle difference between the generator and the bus, and output speed and voltage regulation signals to achieve fast and smooth grid connection operation.

Each DGU can only install a maximum of one SCM-1 module.

2.8 SCM-2 Synchronization and Measurement Module (Dedicated for Shaft Belt/Bus Union)

SCM-2 is functionally similar to SCM-1, but its design goals are different, mainly used for:

Protection and Control of Axial Generator

Synchronization and Control of Bus Union Circuit Breaker

Other occasions that require three-phase measurement and synchronization functions

The introduction of SCM-2 greatly enhances the control capability of the system in multi segment busbars and complex power plant topologies. A maximum of 3 SCM-2 modules can be installed in one DGU.

2.9 PRM-1 Protection Relay Module

PRM-1 is an advanced protection relay module that focuses on protecting against abnormal operating conditions in the power grid or generator. It provides richer protection functions than basic protection, such as:

Positive sequence voltage low protection

Over/under frequency protection

Overvoltage/undervoltage protection

Negative sequence current high protection (reflecting system imbalance or asymmetric faults)

And other advanced protection features

A maximum of 2 PRM-1 modules can be installed in one DGU.

Chapter 3 Hardware Installation and Physical Specifications

3.1 Rack System

All DELOMATIC 3 modules are installed in a dedicated standard rack. This rack complies with the German Federal Railway standards BN 411002 and BN 411003, and has a sturdy structure. The rack backplane integrates a communication bus consisting of flat cables and multiple 64 pin connectors, providing power and data connections for each module slot. Each connector corresponds to a set of PCB rails to ensure accurate and secure module insertion.

The rack offers two standard sizes:

84 TE rack: Available space 84 TE (1 TE=5.08 mm), external dimensions A=426.7mm, B=465.1mm, C=483.0mm, empty rack weight 3.5 kg.

60 TE rack: Available space of 60 TE, with external dimensions of A=304.8mm, B=343.2mm, C=361.1mm, and an empty rack weight of 3.0 kg.

Both types of racks offer two options: base installation and embedded installation, which users can choose based on the design of the control cabinet.

3.2 Special Environmental Adaptability

Shock absorber kit:

For application environments with strong vibrations, such as ship applications, the frame must be equipped with shock-absorbing kits. As a standard equipment for ship applications, this kit can effectively absorb mechanical vibrations and protect internal precision electronic components. For land-based power plants or thermal power plants, they can also be optionally selected if needed.

84 TE rack shock absorber kit: increased weight by 1.2 kg.

60 TE Rack Shock Absorber Kit: Increases weight by 0.9 kg.

Installation space requirements:

To ensure maintenance and operational convenience, the reserved space in front of the rack must be considered during installation:

The distance from the back wall of the control cabinet to the inside of the cabinet door must be greater than a certain value to ensure that protruding components such as ARC net connectors do not interfere with the closure of the cabinet door.

After opening the cabinet door, the distance from the front surface of the rack to any obstacles in front must also be sufficient to provide ample operating space for technicians.

Protection level and safety:

Protection level: When all slots of the rack are installed with functional modules or cover plates, the front and rear protection levels reach IP20.

Flame retardancy: All plastic components comply with UL94-V0 standards and have self extinguishing properties.

Environmental adaptability: The working temperature range is wide from -25 ° C to+70 ° C, the storage temperature is -40 ° C to+70 ° C, the climate level meets the HSE standard of DIN 40040, and it can adapt to high humidity environments.

3.3 Certification and Compliance

The DELOMATIC 3 system has complete compliance certification, ensuring its applicability worldwide:

CE mark: compliant with relevant EU directives.

Classification society certification: It has obtained formal recognition from multiple international mainstream classification societies, including LR (Lloyd's Register), GL (Germanischer Lloyd), DNV (Det Norske Veritas), ABS (American Bureau of Shipping), BV (French Classification Society), RINA (Italian Classification Society), CCS (China Classification Society).

Chapter 4 System Communication and External Interfaces

4.1 Integration with the upper system

Although DGU and CP can independently complete local control, in modern power plants or ship automation systems, it is usually necessary to integrate generator information into higher-level monitoring or alarm systems. DELOMATIC 3 provides the ability to communicate with the upper system through the interface on the CM-2 module.

The CM-2 module converts the internal ARC net network into a standard serial communication interface, including:

RS232

RS422

RS485

The communication protocol adopts the industrial universal MODBUS RTU, which enables any upper computer, PLC or touch screen that supports the MODBUS protocol to easily read all data in the DGU and possibly send control instructions.

4.2 PC graphic monitoring

In addition to standard MODBUS communication, DEIF also provides a more powerful graphical monitoring solution. By installing dedicated ARCnet network cards and supporting software on PCs or industrial tablets, users can directly access the ARCnet network and achieve comprehensive monitoring of up to 8 DGUs and their subordinate CPs. At this point, PC has become an advanced terminal on the network, capable of real-time display of process flow, trend curves, alarm lists, and parameter adjustment, providing a visual experience far superior to traditional control panels.