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This paper has described a high-level plan for wide-area control implementation in an EMS to improve power system grid security. The primary intent is to protect the electrical interconnection from a widespread collapse. Wide area controls are meant to protect the grid as an entity. In some cases, the appropriate action would be islanding and blacking out a portion of the grid in order to prevent...
Rigorously speaking, power systems state estimation (SE) results aim at allowing the operator to take decision in order to assure network security. Therefore, in order to assure reliable information, SE results must be obtained through a very robust algorithm. In this work, the algorithm employed to solve the state estimation problem is based on the orthogonal iteratively re-weighted least-squares...
Cyber system plays an important role in supervising and controlling power system. Besides its contribution of much convenience to power industry, the cyber system brings some potential danger because of its inherent vulnerability. It is significant to assess the vulnerability of cyber system, determine its risk to power industry, find out the weak parts, set appropriate strategies to avoid the probable...
PJM Interconnection (USA) and Powertech Labs Inc. (Canada) have successfully designed and implemented a Transient Stability Analysis & Control (TSA&C) system at PJM system control center by using new techniques. This is a first real time transient stability analysis and control tool developed for such a large power system. PJM's EMS provides a real time snapshot including power flow case from...
Ontario market system created more stringent requirement on state estimator that support not only the traditional EMS operation but also the real time and pre-dispatch market operations. This paper describes the key requirements for a state estimator in the market environment, functional enhancements implemented to achieve 99.6% availability, and operational experience with the state estimator software
Power system deregulation brings broader reliance on information systems and telecommunication network to share the critical and non-critical data. In par with the network system expansion in power system, network security vulnerabilities have increased tremendously. Utilities are currently more vulnerable for external attacks due to integration of cooperate network and supervisory control and data...
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