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Information about the accuracy of state estimation results in distribution networks is crucial for an effective and safe network management. This paper explores a new method of quantifying the uncertainty of a state estimation result by using information entropy as an index for observability. This index has the ability to represent the network observability as a single continuous number, making it possible for the network operator to objectively evaluate the reliability of a state estimation result. This paper also investigates the changes in observability due to load variations and demonstrates how an optimal meter placement method based on the proposed observability index can be implemented. The proposed method has been tested via simulations on a modified IEEE 34 Bus Test Feeder and was compared with an existing method.

Item Type:	Refereed Conference Paper
Keywords:	state estimation, observability, information entropy, optimal meter placement
Research Division:	Engineering
Research Group:	Electrical engineering
Research Field:	Electrical energy generation (incl. renewables, excl. photovoltaics)
Objective Division:	Energy
Objective Group:	Energy storage, distribution and supply
Objective Field:	Energy services and utilities
UTAS Author:	Brinkmann, B (Mr Bernd Brinkmann)
UTAS Author:	Negnevitsky, M (Professor Michael Negnevitsky)
UTAS Author:	Yee, T (Mr Timothy Yee)
ID Code:	105795
Year Published:	2015
Deposited By:	Engineering
Deposited On:	2016-01-14
Last Modified:	2017-11-06
Downloads:	211 View Download Statistics