lecture18- Contengency Analysis

lecture18- Contengency Analysis - EEL 6266 Power System...

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EEL 6266 Power System Operation and Control Chapter 11 Power System Security
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© 2002, 2004 Florida State University EEL 6266 Power System Operation and Control 2 System Security c The main concern in power system operation r minimize the operating cost c An important operating factor r maintain system security c System security r practices designed to keep the system operating when components fail c example: a generator must be taken off-line because of auxiliary equipment failure s maintaining proper amounts of spinning reserve, the remaining generators can make up the deficit s system is served without too low a frequency drop or the need to shed any load
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© 2002, 2004 Florida State University EEL 6266 Power System Operation and Control 3 Security Preparedness c The timing of initiating events that cause components to fail are unpredictable r the system must be operated so that any credible event will not put the system in a dangerous condition r power equipment is designed to operate within known limits c protection devices automatically switch out equipment that exceeds the specified limits c if an event leaves the system operating with limits violated, the event may be followed by a series of further actions that switch other equipment out of service s if the process of cascading failures continues, large parts or the entire system may completely collapse; i.e.; a system blackout
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© 2002, 2004 Florida State University EEL 6266 Power System Operation and Control 4 System Security c Three major functions of system security r system monitoring r contingency analysis r security-constrained optimal power flow analysis c System monitoring r provides the operators with up-to-date information on the condition of the power systems c critical quantities are measured s voltages, currents, power flows, and the state of circuit breakers and switches s frequency, generator outputs, and transformer tap positions c the measurements are sent to the control central s via the telemetry system
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© 2002, 2004 Florida State University EEL 6266 Power System Operation and Control 5 System Security c System monitoring r computers collect the telemetric data, processes and stores them, and displays information for the operators c the computes check incoming information against pre-selected limits and annunciate alarms in the event of overloads or out-of-limit voltages c state estimation combines the telemetric system data with the system’s network model to produce the “best estimate” of the current power system condition or state s measurements, metering devices, and the communication
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This note was uploaded on 07/15/2011 for the course EEL 6266 taught by Professor Thomasbaldwin during the Fall '04 term at FSU.

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lecture18- Contengency Analysis - EEL 6266 Power System...

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