2nd MARINe ELectrical InitiatiVE (MARINELIVE) International Conference on “All Electric Ships”
National Technical University of Athens, School of Naval Architecture& Marine Engineering Division of Marine Engineering 9 Heroon Politechniou st., 15773 Zografou, Greece
Analyzing The Electrical Magnitudes Of An On Board Power Quality Monitoring System Stefanos E. Dallas Andreas D. Skoufis Anastasios G. Charitopoulos John M. Prousalidis Spyridon V. Giannoutsos
2nd MARINe ELectrical InitiatiVE (MARINELIVE) International Conference on “All Electric Ships”
Power Quality Issues in an AES due to: Starting Currents of High Load Motors (Thruster) Electric Propulsion (High Power Consumption from Pods) Different operating voltages (400 V - 6.6 kV) and frequencies (50 Hz - 60 Hz) Starting – Stopping of Various Loads (pumps, fans, etc)
Power Quality Optimization through Monitoring & Recording
2nd MARINe ELectrical InitiatiVE (MARINELIVE) International Conference on “All Electric Ships”
Electric Power Quality (PQ) problems in Ship Electric Energy Systems (DEFKALION)
Project Coordinator:
Dr. John Prousalidis, Associate Professor
External Evaluation Committee:
Mr. P. Leontis, Intership Maritime Professor C. Hodge, BMT Defense Dr. A. Greig, UCL Dr. O. Nayak, Nayak Corporation Dr. R. Bucknall, UCL
2nd MARINe ELectrical InitiatiVE (MARINELIVE) International Conference on “All Electric Ships”
Electric Power Quality (PQ) problems in Ship Electric Energy Systems (DEFKALION)
Project Coordinator: Dr. John Prousalidis, Associate Professor Research Activities: • Investigation of PQ problems due to shaft generator operation • Investigation of PQ problems due to thruster operation • Investigation of PQ problems due to pod operation • Analysis of impact of earthing (grounding) on PQ phenomena
• Analysis of PQ phenomena due to lightning strikes • PQ Measuring and Monitoring System
2nd MARINe ELectrical InitiatiVE (MARINELIVE) International Conference on “All Electric Ships”
Electric Power Quality (PQ) problems in Ship Electric Energy Systems (DEFKALION)
2nd MARINe ELectrical InitiatiVE (MARINELIVE) International Conference on “All Electric Ships”
Topics of the presentation: • Introducing the Power Quality Monitoring System (PQMS) • Present the motors where the PQMS was applied • Voltage and Current Measurements of the Lump Lub OilOil Pump (LOP) Pump (LOP) • Voltage and Current Measurements of the Cooling Sea Water Pump (CSWP) • Voltage and Current Measurements of the Ventilation Fan (VF) • Power Measurements of the LOP-CSWP-VF
• Conclusions
2nd MARINe ELectrical InitiatiVE (MARINELIVE) International Conference on “All Electric Ships”
Introducing the Power Quality Monitoring System (PQMS)
THE ELSPEC G4420 BLACKBOX
2nd MARINe ELectrical InitiatiVE (MARINELIVE) International Conference on “All Electric Ships”
Introducing the Power Quality Monitoring System (PQMS)
VOLTAGE MEASUREMENTS
CURRENT MEASUREMENTS
2nd MARINe ELectrical InitiatiVE (MARINELIVE) International Conference on “All Electric Ships”
Introducing the Power Quality Monitoring System (PQMS) VOLTAGE MEASUREMENTS 5 Wire Terminals
3 for each phase R-S-T
1 Ground
1 Neutral
2nd MARINe ELectrical InitiatiVE (MARINELIVE) International Conference on “All Electric Ships”
Introducing the Power Quality Monitoring System (PQMS) CURRENT MEASUREMENTS 6 Apertures (5 available – 1 disabled (No6))
3 for each phase R-S-T
1 Additional Current Input
1 Neutral
2nd MARINe ELectrical InitiatiVE (MARINELIVE) International Conference on “All Electric Ships”
Introducing the Power Quality Monitoring System (PQMS) Topologies Available from ELSPEC
• • • • •
Line to Neutral single Line to Line configuration 2 phase TR connection Delta 3 wires (including Delta High Leg – Delta Open Leg) and WYE) WYE 4 Wires (including Three Wire WYE).
2nd MARINe ELectrical InitiatiVE (MARINELIVE) International Conference on “All Electric Ships”
Introducing the Power Quality Monitoring System (PQMS) The Measurement System Topology • Data acquisition communication.
was
established
through
wireless
• The ELSPEC devices have ethernet ports (wired communication), which were converted to wireless using a WiFi-router.
•
The real-time monitoring and configuration is achieved via HTTP (web browser), while the acquisition of data is accomplished using PQSCADA software (acquires stored data using FTP).
• For the data acquisition and monitoring a small netbook was used that was wirelessly connected to the router.
2nd MARINe ELectrical InitiatiVE (MARINELIVE) International Conference on “All Electric Ships”
Type of the Tested Motors
P (kW) 75
V (V) 440
I (A) 122.3
f (Hz) 60
OLD STARTER
NEW STARTER
D.O.L
D.O.L
NO.1 MAIN/COPT COOLING SEA WATER PUMP (CSWP)
75
440
129.1
60
Υ/Δ
VFD
NO.1 E/R VENTILATION FAN (VF)
11
440
22.3
60
D.O.L
VFD
MOTOR NO.1 M/E L.O PUMP (LOP)
2nd MARINe ELectrical InitiatiVE (MARINELIVE) International Conference on “All Electric Ships”
Experimental Results Voltage and Current Measurements of the Lub Oil Pump (LOP) RMS Voltage of the Lub Oil Pump (LOP) D.O.L. Operation
Immediate Rise Of The Line To Line Voltages
Respective Rise Of The Line To Line Currents
2nd MARINe ELectrical InitiatiVE (MARINELIVE) International Conference on “All Electric Ships”
Experimental Results Voltage and Current Measurements of the Lub Oil Pump (LOP) RMS Current of the Lub Oil Pump (LOP) The sudden rise of the current, affects the power distribution of the vessel
The motor operation, due to the high
inrush currents
2nd MARINe ELectrical InitiatiVE (MARINELIVE) International Conference on “All Electric Ships”
Experimental Results Voltage and Current Measurements of the Ventilation Fan (VF) RMS Voltage of the Ventilation Fan (VF)
During the repairing process the motor didn’t operate and as result the RMS voltage was zero
2nd MARINe ELectrical InitiatiVE (MARINELIVE) International Conference on “All Electric Ships”
Experimental Results Voltage and Current Measurements of the Ventilation Fan (VF) RMS Current of the Ventilation Fan (VF)
• After the installation of the VFD the current RMS value is significantly lower. • This phenomenon affects the motor power consumption • Better power distribution in the ship.
2nd MARINe ELectrical InitiatiVE (MARINELIVE) International Conference on “All Electric Ships”
Experimental Results Power Measurements Active and Reactive Power of the LOP • Some fluctuations of the motor’s active and reactive power appear that occur during the nominal operation of the Lub Oil Pump • The decrease of the Active Power results in the respective rise of the Reactive Power
2nd MARINe ELectrical InitiatiVE (MARINELIVE) International Conference on “All Electric Ships”
Experimental Results Power Measurements Active and Reactive Power of the VF • The presence of the VFD, reduces the active and reactive power of the VF, almost by 22% and 43% respectively. • The active power reduction influences the power consumption of this motor
• The reduction in reactive power decreases the harmonic content and the reactive currents, causing a better operation of the vessel’s electric grid.
2nd MARINe ELectrical InitiatiVE (MARINELIVE) International Conference on “All Electric Ships”
CONCLUSIONS • The installation of the three measurements devices gave the possibility to obtain online recordings of the fundamental electric magnitudes.
• There is the prospect to proceed into further analysis concerning the harmonic content of both current and voltage and the THD as well.
• When the starting operation of one motor changed (Ventilation Fan), important reduction of the power consumption was accomplished.
• Significant reduction in the reactive power appears, improving the power quality of the vessel.
2nd MARINe ELectrical InitiatiVE (MARINELIVE) International Conference on “All Electric Ships”
CONCLUSIONS • The online monitoring highlights in details some significant phenomena such as the inrush currents and conclude whether there is the need to interfere to a specific motor operation.
• There is the possibility, with a more widespread use of these measuring devices, to observe the loads operation at different running conditions.
2nd MARINe ELectrical InitiatiVE (MARINELIVE) International Conference on “All Electric Ships”
AKNOWLEDGEMENTS THENAMARIS Ships Management INC
ROTECH Engineering LTD (Equipment of ELSPEC G4420-Instructions)
The Captain and the Crew of M/T SEASCOUT This research has been co-financed by the European Union (European Social Fund – ESF) and Greek national funds through the Operational Program "Education and Lifelong Learning" of the National Strategic Reference Framework (NSRF) - Research Funding Program: THALES: Reinforcement of the interdisciplinary and/or inter-institutional research and innovation
2nd MARINe ELectrical InitiatiVE (MARINELIVE) International Conference on “All Electric Ships”
Thank you for your attention !