REVIEW OF ON-LINE DYNAMIC SECURITY ASSESSMENT TOOLS AND TECHNIQUES

The CIGRE WG C4.601 on Power System Security Assessment was formed in August 2004,
at the CIGRE Session 2004 and was given the charter to specifically look at the following
needs in the industry:
1. The design of controls to enhance system security. This includes local device
controls as well as system wide area controls and remedial action schemes.
2. Modeling of existing and new equipment required for power system analysis. (In this
task it was felt that the most pertinent and timely activity was to look at the modeling and
dynamic performance of wind generation systems.)
3. The design of monitoring systems for real time stability evaluation and control.
4. New analytical techniques for assessment of power system security. In addition to
advances in computational methods, this includes the development of emerging
approaches such as risk-based security assessment and the application of intelligent
technologies.
To this end, all of the above subject matters were tackled by the Working Group. More
specifically, of the more than one hundred members and contributors to the work, three adhoc
groups were developed within the Working Group, each given the task to address one of the
first three subject matters above. The fourth task is one that the working group as a whole has
presently started on, after having finished the other three tasks. The three completed tasks
have resulted in the publication of three CIGRE Technical Brochures. These are:
• CIGRE Technical Brochure on Wide Area Monitoring and Control For Transmission
Capability Enhancement (this effort was lead by C. Rehtanz)
• CIGRE Technical Brochure on Modeling and Dynamic Behavior of Wind Generation
as it Relates to Power System Control and Dynamic Performance (this effort was lead
by P. Pourbeik)
• CIGRE Technical Brochure on Review of On-Line Dynamic Security Assessment
Tools and Techniques (this effort was lead by K. Morison)
During the course of the work, in addition to the formally elected WG members a large
number of others contributed significantly to these efforts. All have been properly
acknowledged. The combined group of members and contributors constituted 125 experts
from 25 countries. These included experts from equipment manufacturers, utility engineers,
consultants and research organizations around the world. The work on the three Technical
Brochures mentioned above was completed in December 2006, with final reviews and
approvals before publication occurring in early 2007. Thus, the work took nearly two and a
half years to complete.
All three documents constitute timely and valuable information for transmission system
planer, operators, reliability organization and engineers in research and consulting firms.
As stated previously, the Working Group is currently working on its last assignments (item 4.
above). It is expected that this will be reported on in the near future.