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This paper presents an efficient security assessment system for validating power system operation planning, which has been used in Henan provincial power grid in China. Daily operation planning is to schedule unit commitment and to dispatch generator output economically considering next day generators and transmission components' maintenance planning. The security assessment for validating the daily...
This paper presents the practical experience of the Brazilian System Operator with the online dynamic security assessment. More specifically, it describes the adopted models, analytical methods and functions, performance, EMS integration, user interface and implementation issues. Examples of situations in which the online security assessment was very useful are also shown.
The growth and loading of today's power system needs more elaborated tools to monitor the system security in order to find countermeasures in case of system insecurity and instability. Studying system security refers to analysis of system voltage, transient and small signal stability. The paper will combine a set of indexes for the overall system behavior ranking small system behavior, transient stability,...
Methods for the assessment of the dynamic network security, with regard to the installed protection system, are introduced. Currently, an accordant online system is under development together with European Universities and European Transmission System Operators. Here, the purpose is the observation of the security of the overall system, consisting of primary network and the superimposed interacting...
A Wind penetration Secure level Assessment Tool (WSAT) is currently being developed by EirGrid Pic and Powertech Labs Inc that will help maximising use of its wind power generation while maintaining secure operation of the Irish power system. The tool is based on voltage and transient security analysis of transfers between wind and conventional power generation. In on-line WSAT application WSAT obtains...
Electricity infrastructure touches us all - the key challenge, pertinent to this panel session, is to enable secure and very high-confidence sensing, communication and control of a heterogeneous, widely dispersed, yet globally interconnected system, which is a serious technological problem in any case. It is even more complex and difficult to control it for optimal efficiency and maximum benefit to...
In this paper, a method of decision tree-based computation of security regions and boundaries for power systems is proposed. These computations are used in dynamic security enhancement via generation rescheduling against transient instabilities. This work also involves an iterative method of generation rescheduling using the security regions calculated by decision trees. The proposed methods are implemented...
This paper proposes a region-wise dynamic stability assessment scheme to real-time predict stability margin of a power system after given contingencies. The proposed scheme is able to efficiently and strategically conduct simulations to dynamically determine a security region of the system's operating conditions. By means of phasor measurement units (PMUs), the location of the current operating point...
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