Reactive power compensation using an energy management system
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Authors
Prato, Michael V.
Subjects
Reactive power
reactive power compensation
reactive power control
reactive power demand
power factor
power factor improvement
power factor correction
energy management system
EMS
power loss
reactive power loss
zero-crossing detection
closed-loop current control
energy efficiency
energy cost savings
reactive power compensation
reactive power control
reactive power demand
power factor
power factor improvement
power factor correction
energy management system
EMS
power loss
reactive power loss
zero-crossing detection
closed-loop current control
energy efficiency
energy cost savings
Advisors
Julian, Alexander L.
Oriti, Giovanna
Date of Issue
2014-09
Date
Sep-14
Publisher
Monterey, California: Naval Postgraduate School
Language
Abstract
A significant contributor to higher energy costs and reduced energy efficiency is the reactive power demand on the grid. Inductive power demand reduces power factor, increases energy losses during transmission, limits real power supplied to the consumer, and results in higher costs to the consumer. Compensating for a reactive power demand on the grid by providing reactive power support to the power distribution system creates energy efficiency gains and improves cost savings. One method of compensating for reactive power is by incorporating an energy management system (EMS) into the power distribution system. An EMS can monitor reactive power requirements on the grid and provide reactive power support at the point of common coupling (PCC) in the power distribution system in order to increase energy efficiency. The use of an EMS as a current source to achieve a unity power factor at the grid is demonstrated in this thesis. The power factor angle was determined using a zero-crossing detection algorithm. The appropriate amount of compensating reactive current was then injected into the system at the PCC and controlled using closed-loop current control. The process was simulated using Simulink and then validated in the laboratory using the actual EMS hardware.
Type
Thesis
Description
Series/Report No
Department
Electrical and Computer Engineering
Organization
Identifiers
NPS Report Number
Sponsors
Funder
Format
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.