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Challenges in Assessing the Behaviour of Nodal Electricity Prices in Insular Electricity Markets: The Case of New Zealand

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  • Daniela Pereira Macedo

    (Management and Economics Department, University of Beira Interior, 6201-001 Covilhã, Portugal
    Department of Management and Economics, NECE-UBI—Research Unit in Business Science and Economics, University of Beira Interior, 6201-001 Covilhã, Portugal)

  • António Cardoso Marques

    (Management and Economics Department, University of Beira Interior, 6201-001 Covilhã, Portugal
    Department of Management and Economics, NECE-UBI—Research Unit in Business Science and Economics, University of Beira Interior, 6201-001 Covilhã, Portugal)

  • Olivier Damette

    (BETA-CNRS, University of Lorraine, 54035 Nancy, France
    BETA-CNRS, University of Strasbourg, 67081 Strasbourg, France)

Abstract

In this new era of energy transition, access to reliable and correctly functioning electricity markets is a huge concern for all economies. The restructuring path taken by most electricity markets involves the movement towards green generation structures and the increasing integration of wind and solar photovoltaic energy sources. Furthermore, it involves the electrification of energy systems, which implies a substantial increase in electricity demand levels. It is also important to add that electricity use has been pivotal in achieving efficient productivity levels in many sectors and is thus crucial to boosting economic activity. Nevertheless, this shift in generation structures has raised several challenges in electricity markets, mainly because the electricity produced from wind and solar photovoltaics is intermittent. In turn, adopting green power sources has been claimed to increase electricity price volatility and thus increase pricing risks. Therefore, to ensure that the right market signals are being sent to investors, the behaviour of electricity prices should be carefully assessed. There are three main types of pricing mechanisms commonly used in electricity markets: zonal, uniform and nodal. This study provides a short literature survey on these three pricing mechanisms. Our analysis has revealed that the assessment of the behaviour of nodal electricity price volatility is rarely studied in the literature. This fact has motivated the exploration of this topic and the consideration of the New Zealand electricity market case. The New Zealand electricity market is an energy-only system with no interconnections with other electricity markets. Furthermore, it has plenty of electricity produced from hydropower, which has a high potential to reduce price volatility through its backup role. The nodal pricing mechanism is complex, and data on it are hard to process. This paper elucidates the main challenges in processing electricity big data. Three different procedures to make this data more useable are described in detail. The main conclusions of this paper highlight the need to access easy-to-manage data and identify certain variables that significantly affect nodal prices for data which are unavailable.

Suggested Citation

  • Daniela Pereira Macedo & António Cardoso Marques & Olivier Damette, 2023. "Challenges in Assessing the Behaviour of Nodal Electricity Prices in Insular Electricity Markets: The Case of New Zealand," Economies, MDPI, vol. 11(6), pages 1-19, June.
    • Handle: RePEc:gam:jecomi:v:11:y:2023:i:6:p:159-:d:1161388
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    References listed on IDEAS

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    Cited by:

    1. Villarroel, Nicolás & Lazo, Joaquín & Watts, David, 2025. "High energy costs in insular energy systems and the potential for integrating innovative renewable solutions: The case of Chile," Renewable Energy, Elsevier, vol. 246(C).

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