ABB RELION 630 Series Technical Manual page 233
Power management
Hide thumbs
Also See for RELION 630 Series:
- Communication protocol manual (304 pages) ,
- Engineering manual (156 pages) ,
- Operation manual (124 pages)
Table of Contents
1MRS757256 F
PML630/Compact Load-Shedding Solution
Technical Manual
If the SLOWLS_OPR output is TRUE, the AVA_POWER output is the same as the Ava
power SLS Trg setting, else the AVA_POWER output remains the same as calculated
above.
The slow load-shedding trigger is inhibited due to any of the following conditions.
•
The INHIBIT_TRG input is TRUE.
•
The SLS_DISABLE input is TRUE.
•
The load-shedding blocking status is TRUE.
•
The Slow load shed mode setting is "Disable".
The Slow load shed logic module calculates the overload amount of the power source
as the difference of the active power (from the Power monitoring module) and the Ava
power SLS Trg setting. For monitoring view, the OVLOD_AMOUNT output provides
the calculated overload amount. The OVLOD_AMOUNT output is zero when the active
power value is less than the Ava power SLS Trg setting or the active power value is
negative.
The Slow load shed logic module can handle the slow load-shedding
based on the overloading of the power source by the En Ov load Amnt
shed setting set to "Yes". The slow load-shedding based on the
overloading of the power source can be disabled by the En Ov load
Amnt shed setting set to "No" and the OVLOD_AMOUNT output set to
zero.
For monitoring view, the SLOWLS_MODE output provides the enabled or the disabled
status of the Slow load shed logic module.
The slow load shed mode indicates if the slow load-shedding is disabled or enabled
due to overcurrent based load shed or demand based load shed. The slow load shed
mode is provided by the SLOWLS_MODE output.
The SLOWLS_MODE output is "Disable" if any of the following condition satisfy.
•
The INHIBIT_TRG input is TRUE.
•
The SLS_DISABLE input is TRUE.
•
The Load-shedding blocking status is TRUE.
•
The Slow load shed mode setting is "Disable".
The SLOWLS_MODE output is "OC & Ext Trg" if the Slow load shed mode setting is
"OC & Ext Trg". Similarly, the SLOWLS_MODE output is "Max Dmd Trg" if the Slow
load shed mode setting is "Max Dmd Trg". The SLOWLS_MODE output is "OC, Max
Dmd, Ext Trg" if the Slow load shed mode setting is "OC, Max Dmd, Ext Trg".
If the SLOWLS_MODE is "Disable", the output SLOWLS_OPR, slow load-shedding
start and slow load trigger inhibition signals are FALSE and the output
OVLOD_AMOUNT is zero.
Power management functions
Section 7
227
Table of Contents
