N-dimensional fault detection and operational analysis with performance metrics

Document type: Conference Papers
Peer reviewed: Yes
Full text:
Author(s): Christian Johansson, Fredrik Wernstedt
Title: N-dimensional fault detection and operational analysis with performance metrics
Conference name: The 13th International Symposium on District Heating and Cooling
Year: 2012
City: Copenhagen, Denmark
Organization: Blekinge Institute of Technology
Department: School of Computing (Sektionen för datavetenskap och kommunikation)
School of Computing S-371 79 Karlskrona
+46 455 38 50 00
Authors e-mail: chj@bth.se
Language: English
Abstract: A district heating consumer substation is a complex
entity, consisting of a range of interacting components
such as valves, pumps, heat exchangers and control
systems. The energy efficiency of a consumer sub-
station is dependent on several things, e.g. settings of
the control system, dimensions and operational
behaviour of hardware and accumulation of sediments
in the heat exchanger. Visualizing this operational
functionality of consumer substations has been studied
in several previous projects.
This paper addresses certain shortcomings inherent in
those previous works by presenting a novel
visualization approach using parallel coordinates and
scatter plot matrices. A comparison between these and
previous visualization techniques is presented and
discussed. Furthermore, the paper presents a scheme
for statistical analysis based on n-dimensional
relationships found in parallel coordinates and scatter
plot matrices, thus providing key performance
indicators appropriate for large-scale detection and
analysis. It is shown that the presented visualization
techniques are at least equal to previous attempts in
regards to fault detection and operational analysis,
while simultaneously addressing several of their
shortcomings. Furthermore, it is shown that the
subsequent statistical analysis provides a workable
starting point for system-wide fault detection and
analysis within any district heating system.
Summary in Swedish: Två metoder för förbättrad informationsspridning inom fjärrvärmesystem presenteras. En baserad på grafisk visualiseringsmetodik, och en baserad på statisktiska nyckeltal. Driftsäkerhet, Operativ visualisering, feldetektering, nyckeltal
Subject: Computer Science\General
Human Work Science\Human Computer Interaction
Keywords: Operating reliability, Operational visualization, Fault detection, Performance metrics, Contour mapping