Wind and Solar Power in Distribution Grids – Risk Management with a Distribution System Operator Perspective
Abstract: The electric utility system is complex and dependent on all of its constituents for attaining a reliable distribution. The increase of solar and wind power adds a new dynamic element to this system. Risk management methodology can help in facilitating a safe and sustainable transition, achieving minimal negative impact on society, environment and economy. The working process of the Thesis is constituted by a risk analysis of low and medium voltage grids that are subjected to an increased share of wind and solar power. Future risk scenarios are identified through a qualitative study. A quantitative study is used to determine if the identified future risk scenarios have come close to, or have already been realized in the distribution grids in Sweden operated by E.ON. The process involves identifying risks, evaluating them and providing suggestions for reducing their likelihood and/or consequences. The findings presented in the Thesis will hopefully create an awareness of the most problematic effects of solar and wind power generation for the operation of distribution grids. The overall conclusion from the Thesis is that most problems that arise due to solar and wind power are manageable.
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