Proteção e Automação Seminário Interno de

Cigré/Brasil
CE B5 – Proteção e Automação
Seminário Interno de Preparação para o
Colóquio do SC B5 2009
Rio de Janeiro, 15-16 de setembro de 2009
Dados do Artigo
• PS3.04
• The road from WAMS to WAPCS
• Tadeja BABNIK, uros GABRIJEL, Bojan
MAHKOVEC, Marco PERKO, Gorazd SITAR
• Slovenia
Contexto
The deregulation of the electric industry has increased the
complexity of the power system operation
Slovenian power system is situated between regions with
large price difference and therefore often stressed by high
transit flows
Wide area disturbances are rare events, however when they
occur the effects on industries, commerce and the everyday
life of the general population can be quit severe
Additional increase in worldwide disturbances requires better
equipment for monitoring and control of power system
operation
Contexto
Excellent observability is of paramount importance for efficient
and proper system control
Slovenian Transmission System Operator (TSO)
Elektro-Slovenija (ELES) implemented the wide area
monitoring system (WAMS)
fills the gap in conventional SCADA/EMS
environment when focusing on local and global
system dynamics
The primary goal of WAMS is to monitor the power system
electrical values in real-time and alert the system operator if
the measured or calculated values exceed the setting values
Contexto
Slovenian WAMS
7 PMUs installed at 400 kV substations:
10 busbar voltage phasors
current phasors dedicated to 17 feeders
current phasors dedicated to 7 power transformers
400/110 kV or 400/220 kV
collects phasors data from PMUs by the use of
standard intranet communication network
Contexto
Slovenian WAMS (cont)
multi-user Web SCADA
wide set of functions for real-time power flow and
stability analysis
voltage stability
frequency stability
power oscillation
phase angle monitoring
line temperature monitoring
over/undervalue detection
Contexto
Slovenian WAMS (cont)
Contexto
Slovenian WAMS (cont)
Contexto
Recorded example 1
Disturbance on November 2006 when the UCTE
interconnected grid split into three areas
The process of UCTE separation was initiated by
tripping of several extra high voltage (EHV) overhead
lines in Northern Germany and propagated through the
UCTE until the network was split in three areas while
the worst was prevented by actions of under or overfrequency relays
Contexto
Recorded example 1 - Disturbance on November 2006 when
the UCTE interconnected grid split into three areas
Contexto
Recorded example 2 - Local oscillations
In April 2008 oscillations in the network occurred when initial
test on a new generator was performed. This power plant is
connected to 110 kV Slovenian grid and is close to 400 kV
substation in Maribor monitored by a PMU.
The reason for instable behaviour of the new generator at the
time was that the voltage regulator and the excitation system
as a whole were not working properly
Contexto
Recorded example 2 - Local oscillations
Contexto
Recorded example 3 - Reconnection of the 400 kV line
Interpreted as a step response and used for generators and
loads models validation
Destaques
Slovenian WAMS
enabled post-disturbance analysis of the power system
operation, which would otherwise not be possible
exchanges selected data with Swissgrid (TSO in
Switzerland) and Terna (TSO in Italy) in real-time
potential lies in the real-time wide area protection and
control system, but will require a more reliable
communication infrastructure than exists today
Destaques
Developed a unique “Mobile PMU” device comprised of a
mobile rack, a PMU and an HSDPA router enabling to
wirelessly connect to the WAMS from almost anywhere
can easily monitor “hotspots” such as initial tests of
new or refurbished generators or validate models of
loads or generators
Dúvidas
Quem é o fornecedor
web SCADA?
aplicativos avançados de tempo real?
PDC?
Como foram integradas as medições fasoriais
aos aplicativos avançados de tempo real?
ao web SCADA
como foram tratadas as grandezas angulares?
Conclusões
By a real-time collection of phasor measurements from the
power system into a central unit together with complex realtime analysis it is possible to set up wide area monitoring,
control and protection platform for a real-time procedures.
But widespread use of such mechanisms will require a more
reliable communication infrastructure than exists today.
For possible future development of wide area protection and
control the key factor is the communication system.
Respostas às questões do REP
• Número da questão
• Questão
• Resposta: