Imbalance energy in Southern African power pool

2017 IEEE PES PowerAfrica Pub Date : 2017-06-01 DOI:10.1109/POWERAFRICA.2017.7991259

S. Zimba, Michal Chudy, F. Janiček

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引用次数: 4

Abstract

Cross-border energy trading is one way of optimizing energy resources in interconnected electric power grids. Energy interchange is scheduled between electric power utilities through bilateral agreements or competitive electricity markets. Normally financial settlement of energy interchange is done based on agreed schedules, and not on actual metered energy. Yet, in a typical hour of delivery, a difference occurs between the agreed schedule and the actual metered energy. This difference is referred to as imbalance energy. If not properly managed, imbalance energy exposes electric power utilities to considerable technical and commercial risks. The objective of this study is to clarify relation between imbalance energy and other variables using long term quantitative data from operation of Southern African Power Pool (SAPP). Quantitative data from official archives such as Area Control Error and Frequency deviation are presented in this study. Although relation between these variables is theoretically well defined, each balancing authority is using slightly different regulations. This study shows operation of SAPP by analyzing statistic data covering 3.5 years.

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南非电力池的能源不平衡

跨境能源交易是互联电网中能源资源优化的一种方式。电力公司之间通过双边协议或竞争性电力市场安排能源交换。通常，能源交换的财务结算是根据商定的时间表完成的，而不是根据实际计量的能源。然而，在一个典型的交付小时内，商定的时间表和实际计量的能量之间会出现差异。这种差异被称为能量不平衡。如果管理不当，能源不平衡将使电力公司面临相当大的技术和商业风险。本研究的目的是利用南部非洲电力联营(SAPP)运行的长期定量数据，阐明能源不平衡与其他变量之间的关系。本研究提供了来自官方档案的定量数据，如区域控制误差和频率偏差。虽然这些变量之间的关系在理论上定义得很好，但每个平衡机构使用的规则略有不同。本研究通过分析3.5年的统计数据来展示SAPP的运作情况。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2017 IEEE PES PowerAfrica

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