Two-stage calibration of power flow measurements without reliable points

Document Type

Article

Publication Date

5-18-1999

Abstract

Power flow and voltage measurements are routinely made and transferred to control centers and planners of a power system. These data underlie the decisions made about the system operation, such as economic operation and forecasting. The accuracy of the measurements is therefore important yet they comprise errors caused by many deterministic factors that are costly to remedy perfectly. The quality of state estimation solutions is thus adversely affected. The method proposed here attempts to make up for calibration errors produced by power, reactive power and voltage instrumentation, by processing the data taking into account the physical constraints of the system. This soft calibration requires a knowledge of the network configuration and the impedance of its components. In a first stage the algorithm corrects the data at the ends of each component using voltage drop constraints and current equality constraints, and this is carried out for all components independently of one another. In a second stage the algorithm corrects the data at each bus independently of one another, with the view of satisfying power balance and reactive power balance. The algorithm is thus well adapted for parallel processing.

Identifier

0032653617 (Scopus)

Publication Title

Electric Power Systems Research

External Full Text Location

https://doi.org/10.1016/S0378-7796(98)00088-1

ISSN

03787796

First Page

83

Last Page

90

Issue

2

Volume

50

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