期刊
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
卷 63, 期 6, 页码 1484-1495出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TIM.2013.2292138
关键词
Instrument transformer; measurement uncertainties; state estimation; synchronized measurements
资金
- European Regional Development Fund
- Republic of Cyprus through the Research Promotion Foundation [PiENEK/0311/42]
- [PN-II-ID-PCE-2011-3-0693-ActiveDGModel]
The state estimator constitutes the cornerstone of the supervisory control and data acquisition system since it provides the power system operating situation in consecutive time intervals. Furthermore, the output of the state estimator is used by other tools responsible for the monitoring and control of the power system. Therefore, there is a need for the power system state estimator to be as accurate and reliable as possible. The main source of uncertainty that may deteriorate the accuracy of a weighted least squares (WLS) state estimator, provided that the network parameters are perfectly known, is the uncertainty that is encompassed in the measurements. It is well known that the measurement chain is not ideal and this information is passed to the state estimator through the measurement weights. In this paper, the effect of the measurement weights, which are calculated by considering both the standard uncertainties associated with the measurement devices and the instrument transformers, on the WLS state estimator is examined.
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