IEEE Power & Energy Magazine - September/October 2015 - 61

summarize recent and emerging
developments in China's PMU/
WAMS communication and synchronization network and then
present some major advanced
applications and novel pilot projects utilizing synchrophasor measurement technology.

Recent Development
and Applications
of PMUs in China
China's power transmission grid
is run by two major transmission
system operators, the State Grid
Corporation of China (SGCC)
and the smaller China Southern
Power Grid (CSG). Together, they
have deployed large numbers of
PMUs as part of a nationwide
mandate requiring that all substations in 500-kV networks and
above and all generators larger
than 100 MW be monitored by
PMUs. A map of China detailing
the deployment of PMUs is displayed in Figure 1.
As of the end of 2013, the
number of PMUs installed at
substations and power plants by
the SGCC was 2,027. Sorted by
voltage level, the installation of
©istockphoto.com/petmal
PMUs is shown in Table 1.
All PMUs in operation are
provided by seven domestic manufacturers. The top four of
these (accounting for more than 98% of the total equipment
amount) are Beijing Sifang Automation Company, NARITechnology, the China Electric Power Research Institute
(CEPRI), and NARI-Relays.
Currently, 234 PMUs have been in operation for under a
year, 1,337 for more than one year but fewer than six years,
362 for more than six years but fewer than ten years, and 15
for more than ten years. The distribution of PMUs by operation duration is charted in Figure 2, which shows that more
than 80% of these PMUs were installed during the past five
years. This indicates very rapid growth in PMU deployment
after the 2008 launch of China's smart grid projects. In addition, the CSG has installed 373 PMUs, including 211 located in substations and 162 in power plants.
With the enhancement of synchronized phasor measurement technology, current practice for PMU
development in China has two main goals: supporting smart substation techniques and improving
measurement accuracy based on the latest standards for PMUs.
Approximately 100 PMUs supporting International Electrotechnical Commission (IEC) standard 61850 have been commissioned in recent years. With the rapid development of smart substation

Phasor Measurement
Units in a Wide-Area
Management System

september/october 2015

ieee power & energy magazine

61



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Table of Contents for the Digital Edition of IEEE Power & Energy Magazine - September/October 2015

IEEE Power & Energy Magazine - September/October 2015 - Cover1
IEEE Power & Energy Magazine - September/October 2015 - Cover2
IEEE Power & Energy Magazine - September/October 2015 - 1
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IEEE Power & Energy Magazine - September/October 2015 - Cover3
IEEE Power & Energy Magazine - September/October 2015 - Cover4
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