Abstract— This paper presents the development of a computer proposed in literature [2] – [4]. Also, similar projects on the
based data acquisition system that provides real-time monitoring development of power quality problems monitoring system
of voltage and current at the customer’s point of common
had been implemented in [5] – [6]. This paper proposes the
coupling (PCC). Any power quality disturbances sustained by the
development of a computer-based data acquisition (DAQ)
user throughout the monitoring period were detected and
system that provides real-time monitoring of voltage and
recorded on remote PC. Post acquisition analysis was performed
current, with remote monitoring feature. The DAQ system
on the data collected. The power quality system was put to
several tests and experiments during the development stage of the runs on a desktop computer with National Instruments (NI)
system. Actual continuous real-time monitoring was carried out 6034-E DAQ card. The DAQ system was implemented as a
for one-week duration using the developed system and results
virtual instrument (VI), whereby programming and user
were analyzed and reported.
interface was developed using the NI LabVIEW software. The
main objectives of the project were to capture power quality
Index Terms—Power Quality, Voltage Sag, Real-Time
disturba毕业论文
http://www.751com.cn/ nce events and perform post-monitoring analysis on
Monitoring, Harmonics.
the disturbance data.
I. INTRODUCTION
II. EXPERIMENTAL HARDWARE SETUP
ITH the electric industry undergoing changes in quality,
The power quality monitoring system uses six channels for the
Wincreased attention is being focused on reliability and
measurement of three-phase voltage and current. The
power quality. Many high-tech electricity-dependent devices
measured analog signals undergo signal conditioning, before
and equipment used in commercial and industrial facilities are
being digitized in the DAQ card (A/D converter) and finally
sensitive to many types of power quality disturbances. On the
fed to the computer for processing. The software consists of
other hand, the increasing use of power electronics devices
two main programs, which are for data acquisition and data
contributes further to the arising power quality problems.
analysis. Data acquisition program is used to perform real-
There are numerous types of power quality problems which
time power quality monitoring, detection and data recording
might have varying and diverse causes. Moreover, it is all too
whereas data analysis program is for post-acquisition data
common that different power quality problems can occur
analysis. The DAQ system can be connected to internet,
simultaneously, interchangeably or randomly. In order to
through which it can be monitored and controlled remotely in
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