Basler Electric DGC-2020 - Manual (Page 348)

iv. Configure the LSM-2020 Ethernet parameters.
Generators communicate with each other for demand start/stop functionality through
inter-genset communications over the Ethernet ports on the LSM-2020s in the
system. The IP address, Subnet Mask, and Default Gateway settings for each LSM-
2020 must be configured in order for communication to occur. Instructions for
configuring the LSM-2020 Ethernet parameters are found in the paragraphs titled
Ethernet Communications under Communications in Section 4, BESTCOMSPlus
®
Software.
h. Tune the kW, kvar, speed, and voltage controllers.
Controller tuning is performed after all other settings have been configured and is the last
step in setting up a DGC-2020 and LSM-2020 for load sharing or load control. There are four
Proportional - Integral - Derivative (PID) controllers involved when a DGC-2020 and LSM-
2020 are used in a load sharing or load control system. Each PID controller has settings for
the following parameters: Kp, Ki, Kd, Td, and Kg. The controller parameters are configured as
part of the controller tuning procedure. The tuning procedures for all PID controllers are
presented in Appendix C, Tuning PID Settings.
Mains Fail Transfer
The DGC-2020 has an internal ATS feature which allows it to monitor the utility, and when the utility fails,
opens the mains breaker, starts the generator, then closes the generator breaker to drive the load. When
the utility returns and is deemed stable, it will return the load to the utility power. When using the mains
fail transfer feature, the DGC-2020 will control the breakers to open and close them to achieve the
transition from the utility to the generator. Physical inputs can be configured through logic to implement
open and close commands for the generator and mains breakers.
Breaker status from a breaker is communicated to the DGC-2020 only by having the breaker element
(either gen breaker or mains breaker) in the logic diagram and a physical input must be connected to the
Status input of the breaker block.
When the DGC-2020 controls a breaker, the following criteria must be met for a breaker to change state:
1. A gen or mains breaker cannot be closed unless the generator voltage is stable, and the bus voltage
is stable or dead. A breaker will not close to a dead bus unless the Dead Bus Close Enable
parameter found in BESTCOMSPlus
® under SETTINGS EXPLORER > BREAKER MANAGEMANT >
BREAKER HARDWARE is enabled.
2. A breaker will not change state if it receives conflicting commands. In other words, if a physical input
is indicating an open command the same time another physical input is indicating a close command,
the breaker will not change state.
Steps Required to Configure a DGC-2020 for Mains Fail Transfer
1. Connect the DGC-2020 according to the appropriate figure in Section 6, Installation under
Connections for the type of connection desired (WYE, DELTA, etc.).
2. Set up the system parameters that will govern engine operation and the alarm and pre-alarm
annunciation. Details can be found in the paragraphs titled DGC-2020 Initial Setup. Additional details
of individual settings can be found in Section 4, BESTCOMSPlus
® Software.
3. Configure main and gen breaker parameters in BESTCOMSPlus ® under SETTINGS EXPLORER >
BREAKER MANAGEMENT > BREAKER HARDWARE. See Figure 7-64.
Front Panel Navigation Path: SETTINGS > BREAKER MANAGEMENT > BREAKER HARDWARE
7-60 DGC-2020 Setup 9400200990 Rev X