Electric Power Grid

1
Electric Power Grid The increasing complexity of
a modern power grid highlights the need for
advanced system identification and control
techniques for the power system. This poster
displays work using intelligent nonlinear
identification and control techniques. Each
turbogenerator in the power system is equipped
with a neuroidentifier, which is able to identify
its particular turbogenerator and the rest of
the network to which it is connected from moment
to moment, based on only local measurements.
Each neuroidentifier can then be used in the
design of a nonlinear neurocontroller for each
turbogenerator in such a multimachine power
system. Results for the neuroidentifiers are
presented to prove the validity of the concept.
The FACTS devices and their benefits in power
system control are also presented.

• A turbogenerator - nonlinear, non-stationary,
  fast acting, MIMO device, wide range of operating
  conditions and dynamic characteristics.
• Conventional AVRs, PSSs and turbine governors
• linearized power system model
• one operating point (OP).
• At any other Ops
• generator performance degrades
• undesirable operating states.

Conventional Control


NEW ENGLAND POWER SYSTEM
Flexible AC Transmission Systems
Main types of FACTS devices are
Applications of FACTS devices
Steady State applications


Static Var Compensators (SVCs)
Dynamic Applications

Thyristor Controlled Series

Compensators (TCSCs)

Static Synchronous Compensator
(STATCOM)

Unified Power Flow Controller
(UPFC)

Dynamic Applications

Steady State Applications
- Voltage limits
- Transient Stability
- Dampening
- Thermal limits

- Loop flows
- Post Contingency Voltage
Location of FACTS devices can be determined using
Heuristic techniques such as Genetic Algorithm,
Adaptive Critic Designs and Power Flow
Performance Index, etc.
- Control
- Short circuit levels
- Voltage Stability
- Subsynchronous resonance.
Homeland Security and Force Protection Science
and Technology Conference, August 7 -8 , 2002,
Ft Leonard Wood, Missouri, USA