Basler Electric DECS-2100, Digital Excitation Control System

The DECS-2100 is an extremely powerful and flexible excitation system that

precisely controls, protects, and monitors synchronous generators and motors.

Its multifunctional design allows it to operate in a wide range of applications

that require excitation currents up to 10.000 Adc.

The BESTCOMS™Pro software program complements the DECS-2100 by

embedding many time-saving tools such as programmable logic, integrated

simulator, system monitoring, commissioning, event viewing, system settings

and configuration, and an extensive Help function into one program.

— Product Features & Benefits

• A wide variety of redundancy options increases system reliability.

• An available suite of limiters coordinates with protective functions to help

maintain safe operating parameters and avoid system downtime.

• Various protection functions are integrated into the controller to avoid system

damage.

• Dual gain settings can maximize excitation system performance based on load

conditions.

• Improve system reliability and stability by coordinating dual settings groups for

limiters and protection to match generation system conditions.

• A soft start feature maintains generator voltage control during system startup

to prevent undesired overshoots.

• Time synchronizing provisions facilitate event analysis with a common chronological

reference to aid in coordination efforts when comparing oscillography files from other

devices.

• Real-time monitoring and built-in test provisions simplify system testing and reduce

commissioning time.

• Entering settings with confidence is easy with BESTCOMS™Pro. Software provides

intuitive settings with graphs, built-in error checking, and summary screens.

• Power Drawers allow for simple online and offline maintenance of complete rectifier

bridges that can reduce or eliminate exciter down time.

• Sequence of Events and Oscillography Recording provisions collect valuable system

data triggered by disturbances for event analysis.

• Avoid costly generator damage and improve overall system stability with Basler

Electric’s integrated Power System Stabilizer (optional) that utilizes the “integral of

accelerating power” to safely dampen local mode, inter-area and inter-unit power

oscillations.

• Basler’s in-house engineering, fabrication, manufacturing, and test capabilities

provide maximum control of processes and product design, resulting in the highest

quality and maximum reliability while offering shorter lead times.

• Optional supervisory channel increases system security by avoiding inadvertent

tripping with two-out-of-three controller comparison technique.

Ethernet communication reduces the amount of hardwiring needed for alarm and

status signals while increasing

the amount of information available. This information may be used to interface

with external distributed control

systems such as SCADA, etc.

Each DECS-2100 system is equipped with a default HMI on the logic cubicle door.

The default (local HMI uses one of two available Ethernet ports on the ECM-2

module. Each DECS-2100 system also contains one additional Ethernet port that

may be used for a remote HMI, as a connection to another plant control system,

or to an Ethernet switch so that multiple devices can gather data.

Basler Electric recommends that the DECS-2100 be placed on a dedicated network.

Placing it on an “open network” may cause unwanted communication errors.

Hardware

Each ECM-2 module is equipped with two Ethernet ports which use an RJ-45

connector. Port 2 is typically used for communication with the local HMI on the

door of the DECS-2100 enclosure. Each ECM-2 (on per channel) would be linked

from Ethernet port 2 to an Ethernet switch also linked to the local HMI.

The ECM-2 supports 10Base-T and 100Base-T wiring standards.

The user could connect their plant SCADA system or other Ethernet master to the

Ethernet switch providing the signal to the HMI. However, the same IP addresses

would need to be used for the ECM2 modules. Alternately, the user could connect

the plant SCADA to Ethernet port 1—either directly or through a separate Ethernet

switch. Due to communication issues, Basler Electric prefers the use of Ethernet

port 1 for communication with external plant devices and the use of Ethernet port

2 for the local HMI only.

Software

BESTCOMSPro software provides the ability to set Ethernet addressing on the

two ECM-2 Ethernet ports. Each port gathers data from the same data maps so

the information is identical.

Once the user is connected to the controller via BESTCOMSPro, the Ethernet

ports can be configured in the Settings Explorer (General Settings, Controller

Settings, Ethernet Settings). Ethernet 1 and Ethernet 2 are set independently.