IEEE Power & Energy Magazine - March/April 2018 - 42
The research and development of the new generation
of EMSs started with a research project in 2004 by the
State Grid Corporation of China.
centers and entire network linkage real-time alarming for the
power grid faults of 500 kv and higher voltages in the state grid.
This system also solves the problems of large interconnection
power grid operation under the multilevel control centers, realtime operation information sharing, and fault information synchronized interpretation. The observability of the extra-large
power grid has been enhanced comprehensively.
Multilevel coordination for systemwide agC and avC as
well as for sharing information about system faults among
multilevel control centers has been implemented at all levels of control centers. The systemwide agC and avC technologies use a multizone and multitarget optimization with
grid security constraints that realize the active and reactive
power coordination control of multilevel dispatching. in the
newly developed avC, an adaptive zonal division of the
power grid and a hierarchical control technology coordinate
local autonomic control with systemwide optimization. The
remote control function with cybersecurity uses security
tag, digital certificates, and hardware encryption protection
to ensure secure communication and access control of the
whole process from human-computer login to service linkage, command transmission, and command execution.
a service-oriented waMs with a hierarchical and distributed deployment architecture utilizes the world's largest dynamic monitoring system (more than 3,000 phasor
measurement units). The comprehensive analysis function for
low-frequency oscillations combines online small disturbance
stability analysis to improve the accuracy of online monitoring and analysis of low frequency oscillation.
an online dynamic security early-warning function has
been realized in the hierarchical control centers with three
levels (national, regional, and provincial). online sharing of
the large-scale, cross-regional power-flow data, parallel processing, and distributed coordination calculation mechanisms
are established. about 10,000 computations of transient stability analysis for a large-scale power grid can be finished in
1 min by the parallel computing mode. such a function can
be started periodically every 15 min and also triggered in 3 s
once a significant event has occurred. This dynamic security analysis function with a tracing and recursive calculation
mode is very helpful for grid operators dealing with multiple
cascading events on a power system.
Scheduling and Security Checking
42
ieee power & energy magazine
System Management
System Management
The provincial or higher-level control centers conduct monthly
and weekly power generation planning functions using the
security-constrained unit commitment and the day-ahead and
intraday rolling power generation dispatch scheduling function
based on security-constrained economic dispatch. as a result,
the multi-objective power generation planning and scheduling,
which adaptively follow load variation, are optimized. The temporal
and spatial coordination in the disApplications
Real-Time Control
Schedule and
Operation
patch scheduling is implemented
and Early Warning
Security Check
Management
by the vertical interaction among
Functions
Functions
Functions
control centers at different levels.
a coordination and optimization
Unified Platform Access API
mechanism for multilevel dispatch scheduling of the national,
CIM/G
GIS
Web
Plug-in
regional, and provincial control
Unified
Graphic
Graphic
Graphic
Graphic
Platform
centers has been established.
Dynamic Message Bus
Using an adaptive rolling optiSecurity Service Bus
mization technology combined
with short-term and ultra-shortCross Border Mail Bus
term wind power and photovolHigh Speed Data Bus
taic power forecasts, large-scale
Real-Time
Time Series Time Series
History
intermittent and uncertain renewDB
DB
His. DB
DB
able generation scheduling can
be embedded in the dispatch schedSecurity Operation System
uling to improve the ability of a
large power grid to accommodate
renewable energy.
figure 5. The integrated support platform of the SGOS.
march/april 2018
Table of Contents for the Digital Edition of IEEE Power & Energy Magazine - March/April 2018
Contents
IEEE Power & Energy Magazine - March/April 2018 - Cover1
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IEEE Power & Energy Magazine - March/April 2018 - Cover3
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