Volume 8 – Mechanical and Electrical Services - Malaysia Geoportal

Chapter 10 SCADA AND AUTOMATION SYSTEM
Moreover, according to electricity theory, the system consumes much higher power during each start
up period. In others word, if the system start/stop too frequent it may definitely cause a lot of
electricity wastage. In conventional system, since the system using hardwiring control, frequent start
stop is possible due to gray area in bourdon line of control level. Sudden change of water level, some
time will also cause two or three pump to run in the same time. This may cause electricity usage
penalty. Aware of this, Pump Expert System shall be built in a control algorithm that is able to take
cares this problem. The system will intelligently decide when the best time for particular pump to
run. A hysterics is built to avoid the system to start stop frequently. AI control algorithm applied to
the system also enabled the system to take care the sudden change based on previous data and
control.
10.6.6 Components of Pump Expert System
An expert system normally compose of a knowledge base (information, heuristics, etc.), inference
engine (analyzes knowledge base), and end user interface (accepting inputs, generating outputs).
The Pump Expert System consists of the following components and sub-components; Remote
Terminal Unit, Data Acquisition Module, Control Module, Touch Panel Operators Interface, Power
Supply, Lightning Protection Unit (LPU), Sensors , Voltage (R,G,B), Power factor meter and Current
Transducers (R,G,B), Ultrasonic Water Level Sensor (Upstream, Downstream), Open Channel Flow
meter (Outflow), Pump Vibration Sensor (for each pump), Communication System, SCADA Server /
Central Monitoring Station (CMS) which functioning as mentioned in section 8.3 above. To further
improve the system, pump expert also built in Maintenance Management Software (MMS) which may
work as below:.
Maintenance Management Software (MMS)
The Maintenance Management System (MMS) is capable of producing computerized and
comprehensive, state of art maintenance management with user selected date and parameters.
The MMS is capable of producing the following reports (depends on available of signal at each pump
houses:
a) Comprehensive vibration status report (daily, monthly summary)
b) Pump running duration report (daily, monthly summary)
c) Current consumption report (daily, monthly summary)
d) Pump efficiency and losses report (daily, monthly summary)
e) Alarms report (daily, monthly summary)
f) Pump power usage report (daily, monthly summary)
g) Electric bill usage report (monthly based on manually keyed–in values)
h) Breakdown report (daily, monthly summary)
The MMS is a simplified Expert System and two way communication system where it can perform the
following mode:
a) Accept Web Online Fault Reporting after user login as authorized user. The MMS will
broadcast the fault report by SMS to all the maintenance staff’s mobile phone as listed in
the MMS User Page
b) Accept SMS Fault Reporting from any maintenance staff mobile number. The MMS will
broadcast the fault report by SMS to all the maintenance staff’s mobile phone as listed in
the MMS User Page
c) Accept Web Online Repair/Maintenance Report after user login as authorized user. The
MMS will broadcast the Repair/Maintenance Report by SMS to all the maintenance staff’s
mobile phone as listed in the MMS User Page
d) Automatically SMS summary of Daily Pump Start/Stop Operations to top level management
staff
March 2009 10-19