14 State Estimation vs State Measurement State Estimation Traditionally

14 state estimation vs state measurement state

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14 State Estimation vs. State Measurement State Estimation Traditionally developed for accommodating old ICT regime (slow communication rate, data without time stamp) State Measurement Make it possible for all round development in technologies. 15 Network model State Estimator V KV P MW Q MVAR Hz Hz ~ Open Close Close Close Several Seconds to a Minute Milli secs to sec History of PMU development Development of computer relaying in 1960 70s Symmetrical component distance relay Significance of positive sequence measurements Importance of synchronized measurement The first PMU atVirginiaTech during 1982 1992 The first prototype of PMU was assembled atVirginiaTech Later installed in the BPA, AEP and NYPA systems 16
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5 17 Hierarchy for Phasor Measurement Systems 18 Applications FNET FNET is a wide area power system frequency measurement system. It can accurately measure the power system frequency, voltages and angles using a type of PMU, known as Frequency Disturbance Recorder (FDR). FDR is installed at ordinary 120V outlets, and it is relatively inexpensive and simple to install. 19 20 FNET Structure
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6 Locations of FDR in North America There are about 80 FDRs installed in the US and another 20 installed world wide 21 Some Records from Real Power System 22 EventTrigger and EventVisualization Web display of real time frequency of US power system 23 Real time Power System Frequency Display End of the Course 24
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