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Presentation
Presentation
This curricular unit aims to provide the student with the following skills: - to understand the mathematical representation of the components for steady-state analysis of electrical power systems; - to solve load flow problems (AC model) and to analyze the results with critical thinking; - to carry out control actions on the electrical power systems based on load flow results; - to conduct symmetrical and asymmetrical short-circuit studies and to draw technical conclusions based on results.
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Class from course
Class from course
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Degree | Semesters | ECTS
Degree | Semesters | ECTS
Bachelor | Semestral | 5
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Year | Nature | Language
Year | Nature | Language
2 | Mandatory | Português
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Code
Code
ULP732-10367
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Prerequisites and corequisites
Prerequisites and corequisites
Not applicable
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Professional Internship
Professional Internship
Não
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Syllabus
Syllabus
1. Load flow analysis Nodal analysis: bus admittance and impedance matrixes for a n-bus system; Resolution of load flow problems: calculation of bus voltages, power flow in lines, and injected power in the compensation and reference bus; Newton-Raphson and the Fast Decoupled methods; Control of power flow in lines and control of bus voltage; FACTS; Contingency analysis; 2. Short-circuit analysis Mathematical models of network elements; Calculation of symmetrical short-circuit currents using the bus impedance matrix; Symmetric components method: symmetric properties and impedances; Calculation of asymmetrical short circuits: Phase-Ground, Phase-Phase and Phase-Phase-Ground; Computational methods for calculating short-circuit currents.
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Objectives
Objectives
- To derive the mathematical models that represent the steady-state behavior of the various components of the electrical power systems; - To solve the load flow problem using several methods, namely, the Newton-Raphson and the Fast Decoupled Load Flow methods; - To know how to use the techniques and equipment to control the power flow in transmission lines, in particular, capacitor banks and regulating transformers; - To solve load flow problems for systems with n buses using computational tools; - To conduct contingency analysis; - To understand and perform matrix calculations for symmetrical and asymmetrical short-circuit analysis, including the digital calculation of short-circuit currents; - To analyze the outcome of load flow problems and short-circuit simulations and to draw technical conclusions.
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Teaching methodologies and assessment
Teaching methodologies and assessment
The syllabus will be developed in the theoretical classes through formal exposition and resolution of simple didactic examples. The concepts acquired in the theoretical classes will be further developed in the practical classes through the resolution of exercises with a high degree of difficulty. Students will be challenged to solve the problems of the worksheets referring to the various themes covered in this course using dedicated software. Presential hours will be spent in "tutorial guidance" sessions using the e-learning system (Moodle). The evaluation is continuous and consists of two components: Two assignments (40% of the final grade) Final test (60% of the final grade)
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References
References
Vitor Meireles, Circuitos Eléctricos, 5ª edição, LIDEL - Edições Técnicas, LDA, 2009, ISBN: 9789727575862
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Office Hours
Office Hours
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Mobility
Mobility
No
