Basler Electric DGC-2020HD - Manual (Page 132)

122 9469300990 Rev B
Spinning Reserve
The spinning reserve function is used in conjunction with generator sequencing to run the number of
generators necessary to power the existing load plus an additional power swing amount.
For example, a power station normally has a 2,300 W load throughout the day, with an occasional 500 W
power swing. Without spinning reserve, the DGC-2020HD starts only the number of generators needed to
power the 2,300 W load. When the additional 500 W load is applied, another generator is started and
when the additional load is removed, this same generator is shut down.
With a spinning reserve, the user can adjust a setting to account for the power swing. The reserve load is
added to the actual load to find the adjusted load. This adjusted load is per-unitized to determine whether
a generator needs to be started or stopped. To prevent constant starting and stopping, a hysteresis
setting is also provided. There are two reserve levels, one for normal operation, and a second to start a
unit more quickly when there is less reserve.
The BESTCOMSPlus Demand Start/Stop screen is illustrated in Figure 64. Settings are listed in Table 42.
Figure 64. Settings Explorer, Multigen Management, Demand Start/Stop
Table 42. Settings for Demand Start/Stop
Locator Setting Range Increment Unit
A Demand Start Stop Mode
Disable, Per Unit
Load, or Spinning
Reserve
n/a n/a
B Delayed Start Level 1 0 to 1 0.001 per unit
C Delayed Start Level 2 0 to 1 0.001 per unit
D Delayed Stop Level 0 to 1 0.001 per unit
E Start Level 1 Timeout 0 to 32,000 1 seconds
F Start Level 2 Timeout 0 to 32,000 1 seconds
G Stop Timeout 0 to 32,000 1 seconds
H Capacity Level 1 1 to 999,999 1 kW
I Capacity Level 2 1 to 999,999 1 kW
J Hysteresis 5 to 65,000 1 kW
K Start Level 1 Timeout 0 to 32,000 1 seconds
L Start Level 2 Timeout 0 to 32,000 1 seconds
M Stop Timeout 0 to 32,000 1 seconds
Multiple Generator Management DGC-2020HD