Analysis of transmission loss model in New Zealand Electricity Market dispatch

Author

Zhang, Zhongwei Jake ; Goodwin, Doug ; Nair, Nirmal-Kumar C.

Author_Institution

Electricial & Comput. Eng. Dept., Univ. of Auckland, Auckland, New Zealand

fYear

2013

fDate

Sept. 29 2013-Oct. 3 2013

Firstpage

1

Lastpage

5

Abstract

A 3-segment piece-wise linear model is used in New Zealand Electricity Market dispatch for transmission loss calculation. Although the loss model delivers efficient software performance, the loss linearisation introduces small fraction of modelling error to be multiplied in the wholesale market settlement. This paper revisits the quadratic loss model linearisation in the context of market scheduling and dispatch, and then analyses the effect of loss modelling on economic dispatch using the IEEE 30-bus network. GAMS and MATPOWER are used in conjunction for linear programming and load flow analysis respectively. The results show that loss modelling error has no effect on individual nodal price variation, and its impact on market settlement becomes not negligible only when marginal generator is affected during high system loading.

Keywords

linear programming; load dispatching; losses; power markets; power transmission economics; GAMS; IEEE 30-bus network; MATPOWER; New Zealand electricity market dispatch; linear programming; load flow analysis; loss linearisation; market scheduling; piece wise linear model; quadratic loss model linearisation; transmission loss calculation; transmission loss model; Manganese; Programming; New Zealand Electricity Market; security constrained economic dispatch; transmission loss model;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Engineering Conference (AUPEC), 2013 Australasian Universities

Conference_Location

Hobart, TAS

Type

conf

DOI

10.1109/AUPEC.2013.6725430

Filename

6725430