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E400
Generating Electricity from Variable Renewable Sources: Effect on the Grid

Mark P. Rossow, Ph.D, PE Retired

Since its origin in the early 1920s, the U. S. electrical grid has evolved to handle power sources whose output is predictable and can be controlled. Examples are coal, oil, natural gas, and hydropower. Because the output from these sources is controllable, operators of the grid can work with power plant operators to increase or decrease power production as the load on the grid varies. Through an intricate system of load balancing developed by many people over the years, grid operators are thus able to maintain stable, high-quality electrical power in the grid. Once renewable sources of energy such as solar and wind are attached to the grid, however, problems arise: these sources of energy are variable and uncertain. The operators cannot control when the sun shines or when the wind blows. Thus operators now have to deal not only with a varying load, but also with a varying power source. This course provides an overview of the current U. S. electrical grid, including 1) how planning and operations are carried out to ensure reliability, 2) requirements for power reserves to provide continuous service in the face of equipment failure, 3) transmission technology, and 4) economic aspects. It then explores the challenges to the grid posed by high levels of variable renewable generation and some changes that are expected to occur in response to these challenges.

This course includes a multiple-choice quiz at the end, which is designed to enhance the understanding of the course materials.


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NY PE & PLS: You must choose courses that are technical in nature or related to matters of laws and ethics contributing to the health and welfare of the public. NY Board does not accept courses related to office management, risk management, leadership, marketing, accounting, financial planning, real estate, and basic CAD. Specific course topics that are on the borderline and are not acceptable by the NY Board have been noted under the course description on our website.

AIA Members: You must take the courses listed under the category "AIA/CES Registered Courses" if you want us to report your Learning Units (LUs) to AIA/CES. If you take courses not registered with AIA/CES, you need to report the earned Learning Units (not qualified for HSW credits) using Self Report Form provided by AIA/CES.

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