Reliability of electric power systems and power quality
Description: Consists of the following sections: tasks and initial provisions of the assessment of reliability; factors that violate the reliability of the system and their mathematical descriptions; mathematical models and quantitative descriptions; mathematical models and quantitative calculations of systems reliability; feasibility study of undersupply of electricity and efficiency of reliable power supply.
Amount of credits: 5
Пререквизиты:
- Transient Processes
Course Workload:
| Types of classes | hours |
|---|---|
| Lectures | 30 |
| Practical works | 15 |
| Laboratory works | |
| SAWTG (Student Autonomous Work under Teacher Guidance) | 30 |
| SAW (Student autonomous work) | 75 |
| Form of final control | Exam |
| Final assessment method | A written exam |
Component: Component by selection
Cycle: Base disciplines
Goal
- obtaining knowledge about the modern theory of reliability in technology and the application of its methods in electric power systems
Objective
- determine the optimal structure of electric power systems and networks based on the analysis and calculation of reliability
Learning outcome: knowledge and understanding
- Analyse and understand the role of reliability in the design and operation of power supply systems
Learning outcome: applying knowledge and understanding
- Apply basic knowledge in the operation of power system reliability and power quality to conduct experiments
Learning outcome: formation of judgments
- Organise workplaces and be able to calculate operating modes of objects of professional activity
Learning outcome: communicative abilities
- Analyse the impact of various factors on the reliable operation of electric power systems and grids
Learning outcome: learning skills or learning abilities
- Observe electrical safety at work, participate in research projects related to the reliability of power supply systems and the quality of electrical energy Obtain new knowledge when conducting research work, be able to apply the obtained theoretical knowledge in practice, analyze the operation of electric power systems, be able to process the results of experiments
Teaching methods
The discipline is interconnected with the disciplines of the core academic disciplines of the curriculum: mathematics, chemistry, descriptive geometry and engineering graphics, physics, computer science, theoretical mechanics, physical foundations of electronics, electrical and structural materials science, theoretical foundations of electrical engineering, applied mechanics, metrology, standardization and certification, basics electromechanics, theoretical foundations of electrical engineering, electrical machines, general energy, theory of automatic control, power electronics, electrical and electronic devices, electric drive, fundamentals of the theory of reliability.
Assessment of the student's knowledge
Teacher oversees various tasks related to ongoing assessment and determines students' current performance twice during each academic period. Ratings 1 and 2 are formulated based on the outcomes of this ongoing assessment. The student's learning achievements are assessed using a 100-point scale, and the final grades P1 and P2 are calculated as the average of their ongoing performance evaluations. The teacher evaluates the student's work throughout the academic period in alignment with the assignment submission schedule for the discipline. The assessment system may incorporate a mix of written and oral, group and individual formats.
| Period | Type of task | Total |
|---|---|---|
| 1 rating | Comprehensive indicators of reliability of restored elements of electrical systems | 0-100 |
| Calculation of the reliability of the electrical network for the undersupply of electricity | ||
| Calculation of the equivalent characteristics of the reliability of the operation of electrical networks in the assessment of damage | ||
| oral questioning | ||
| Line control 1 | ||
| 2 rating | Power quality indicators | 0-100 |
| Calculation of functional reliability in a combination of two ES with a weak connection | ||
| Methodology for calculating the reliability of backbone networks of power plants | ||
| oral questioning | ||
| Line control 2 | ||
| Total control | Exam | 0-100 |
The evaluating policy of learning outcomes by work type
| Type of task | 90-100 | 70-89 | 50-69 | 0-49 |
|---|---|---|---|---|
| Excellent | Good | Satisfactory | Unsatisfactory | |
| The policy for assessing student achievements is based on the principles of academic integrity, unity of requirements, objectivity and fairness, openness and transparency. The discipline involves completing tasks of 2 rating controls (weeks 8 and 15) and passing an exam. Depending on the quality of assimilation of theoretical knowledge, a score is given from 0 to 100%. | A complete, detailed answer to the question posed is given, the totality of conscious knowledge about the object is shown, the main provisions of the topic are conclusively revealed; the answer shows a clear structure, a logical sequence that reflects the essence of the concepts, theories, and phenomena being revealed. Knowledge about an object is demonstrated against the background of understanding it in the system of a given science and interdisciplinary connections. The answer is stated in literary language in scientific terms. There may be shortcomings in the definition of concepts, which are corrected by the student independently during the answering process. | A complete, but insufficiently consistent answer to the question posed is given, but at the same time the ability to identify essential and non-essential features and cause-and-effect relationships is demonstrated. The answer is logical and stated C+ 70-74 in scientific terms. There may be 1-2 mistakes made in defining basic concepts, which the student finds difficult to correct on his own. | An incomplete answer was given, representing scattered knowledge on the topic of the question with significant errors in definitions. There is fragmentation and illogical presentation. The student does not realize the connection of this concept, theory, phenomenon with other objects of the discipline. There are no conclusions, specificity and evidence of the presentation. Speech is illiterate. Additional and clarifying questions from the teacher do not lead to correction of the student’s answer not only to the question posed, but also to other questions in the disciplines | A complete, detailed answer to the question posed is given, the totality of conscious knowledge about the object is shown, the main provisions of the topic are conclusively revealed; the answer shows a clear structure, a logical sequence that reflects the essence of the concepts, theories, and phenomena being revealed. Knowledge about an object is demonstrated against the background of understanding it in the system of a given science and interdisciplinary connections. The answer is stated in literary language in scientific terms. There may be shortcomings in the definition of concepts, which are corrected by the student independently during the answering process. |
Evaluation form
The student's final grade in the course is calculated on a 100 point grading scale, it includes:
- 40% of the examination result;
- 60% of current control result.
The final grade is calculated by the formula:
| FG = 0,6 | MT1+MT2 | +0,4E |
| 2 |
Where Midterm 1, Midterm 2are digital equivalents of the grades of Midterm 1 and 2;
E is a digital equivalent of the exam grade.
Final alphabetical grade and its equivalent in points:
The letter grading system for students' academic achievements, corresponding to the numerical equivalent on a four-point scale:
| Alphabetical grade | Numerical value | Points (%) | Traditional grade |
|---|---|---|---|
| A | 4.0 | 95-100 | Excellent |
| A- | 3.67 | 90-94 | |
| B+ | 3.33 | 85-89 | Good |
| B | 3.0 | 80-84 | |
| B- | 2.67 | 75-79 | |
| C+ | 2.33 | 70-74 | |
| C | 2.0 | 65-69 | Satisfactory |
| C- | 1.67 | 60-64 | |
| D+ | 1.33 | 55-59 | |
| D | 1.0 | 50-54 | |
| FX | 0.5 | 25-49 | Unsatisfactory |
| F | 0 | 0-24 |
Topics of lectures
- Basic concepts and indicators of reliability
- Methods of Probability Theory and Characteristics of Parametric Reliability of Electric Power Systems and Networks
- Statistical methods for assessing, analyzing and monitoring the reliability of electric power systems and networks
- Technological features of ensuring reliability in electrical systems
- Technical indicators of reliability of elements of electrical systems and their definition
- Indicators of reliability of distribution electrical networks, with series and parallel connection of circuits
- Selection, justification and redistribution of reliability indicators of the designed system
- Structural reliability of the main elements of the ES
- Calculation of the reliability of the electrical network for the undersupply of electricity
- Functional reliability of electrical systems
Key reading
- Иванов С.Н. Надежность электроснабжения : учебное пособие / Иванов С.Н., Скрипилев А.А.. — Москва, Вологда : Инфра-Инженерия, 2022. — 164 c. — ISBN 978-5-9729-0959-9.
- Тремясов В.А. Теория надежности в энергетике. Надежность систем генерации, использующих ветровую и солнечную энергию : учебное пособие / Тремясов В.А., Кривенко Т.В.. — Красноярск : Сибирский федеральный университет, 2017. — 164 c. — ISBN 978-5-7638-3749-0.
- Захаров О.Г. Надежность цифровых устройств релейной защиты : показатели. Требования. Оценки / Захаров О.Г.. — Москва : Инфра-Инженерия, 2014. — 128 c. — ISBN 978-5-9729-0073-2. —
- Надежность электроснабжения : учебное пособие / И.Н. Воротников [и др.].. — Ставрополь : АГРУС, 2018. — 64 c.
Further reading
- Кобозев В.А. Качество электроэнергии и энергоэффективность систем электроснабжения потребителей : учебное пособие / Кобозев В.А., Лыгин И.В.. — Москва, Вологда : Инфра-Инженерия, 2022. — 356 c. — ISBN 978-5-9729-0770-0.
