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Title The economic losses of power quality disturbance : different perspectives of cost models / by Zhemin Lin.
Name Lin, Zhemin. .
Abstract An assessment of the economic impact of power quality disturbances can be performed from the perspective of either electricity customers or power grid owners, depending on the consequences considered by either side. Examples of economic losses due to power quality issues for power grid owners may include compensation and loss of customer royalties, while for electricity customers, the losses may come from damaged products, disrupted industrial process and loss of revenue. In this thesis, the economic losses due to power quality issues are mainly discussed from the customer-oriented perspective. To assess the customer-oriented economic losses of a power system, a cost model is required to describe the characteristics of economic losses in mathematical terms. Some cost models for power quality disturbances are already in existence. Many of these models represent economic losses due to a single factor. However, in this thesis, the following two additional points are included: (a) Powe r quality disturbances always have a short term economic impact on customers, which is not covered in most cost models; (b) Economic losses due to power quality disturbances are actually determined by multiple factors rather than a single factor. The cost models developed in this thesis take the effects of multiple factors into account. This thesis has developed a set of new cost models to evaluate the multiple-factor-dependent potential economic losses due to power quality disturbances. These proposed cost models are specifically designed to calculate short term economic losses while considering customer and time varying impact factors. A time varying coefficient to quantify the effects of time of occurrence for different types of power quality disturbance is also proposed.
Abstract With the use of the time varying coefficient, the differences in economic losses at different times of occurrence can be accurately represented. In this thesis, all of the proposed cost models are demonstrated individually in different power quality disturbance scenarios and a simple distribution system is used to illustrate the applications of these proposed cost models in a system. The results show the valid applications as well as the advantages of the proposed short term cost models.
Publication date 2012
Name University of Strathclyde. Dept. of Electronic and Electrical Engineering.
Thesis note Thesis PhD University of Strathclyde 2012 T13313
System Number 000002224

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