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Speculative Imbalance Positions by Non-Physical Traders: Impacts on Electricity System Balancing in Great Britain

Joseph Cary, Thomas Morstyn · 2026 · arXiv (Cornell University)

DOI: 10.48550/arxiv.2610.28075 · cited by 0 works (OpenAlex) · open-access PDF

Indonesian

Sistem listrik potensial selama periode akhir di Inggris (GB) memungkinkan peserta untuk secara sengaja menghasilkan atau mengkonsumsi volume yang berbeda untuk posisi mereka yang diperdagangkan dan telah mendorong praktek ini dengan harga ketidakseimbangan tunggal sejak 2015. Secara khusus, pedagang non-fisik (NPT) sering mengambil posisi terbuka untuk ketidakseimbangan tanpa niat apa pun untuk menghasilkan atau mengkonsumsi daya. Namun, proposal pemerintah baru dapat membatasi praktek ini karena kekhawatiran tentang ketidakseimbangan persediaan permintaan dan biaya. Artikel ini menyajikan analisis empiris pertama dari posisi ketidakseimbangan spekulatif (SIP) oleh NPTs dalam sistem listrik GB melalui efeknya pada volume ketidakseimbangan, mengimbangi biaya, harga ketidakseimbangan, dan biaya penyelesaian terkait selama periode 2021-2024. Penelitian kami menggunakan data ketidakseimbangan tingkat partai dalam setiap periode

Machine translation (Meta M2M100); the English original follows.

Abstract

The electricity system in Great Britain (GB) allows participants to deliberately produce or consume a different volume to their traded position and has incentivised this practice with a single imbalance price since 2015. In particular, non-physical traders (NPTs) often take an open position to imbalance without any intention to produce or consume power. However, new government proposals could restrict this practice due to concerns over supply-demand balancing feasibility and costs. This article presents the first empirical analysis of speculative imbalance positioning (SIP) by NPTs in the GB electricity system through its effects on imbalance volumes, balancing costs, the imbalance price, and associated settlement costs over the period 2021-2024. Our research uses party-level imbalance data in each settlement period to run counterfactual simulations of the electricity balancing mechanism without the aggregate NPT imbalance. Our results indicate that SIP by NPTs reduced the total net balancing volume required by 3.1-3.9 TWh (16-20%), reduced system imbalance standard deviation by 48-65 MWh (13-17%), reduced balancing costs by £347-396m (5.9-6.7%), and reduced supplier imbalance costs by £193-325m (65-75%) over the analysis period. These results suggest that consumer bills would have been higher without SIP by NPTs, since the extra costs would likely have been passed on to consumers through levies, although the potential for effects in the wholesale (primarily late-stage intraday) markets complicates this picture.

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Topics: Electricity, Counterfactual thinking, Economics, Position (finance), Electricity system, Government (linguistics)

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