In the case of the evaluation in the first call, the practicals, whose delivery and passing with a minimum score of 5 points is compulsory to be able to take the exam, will count the percentage indicated in the evaluation criteria.

In order to pass the subject at the first call, a minimum score of 5 points must be achieved in the overall weighted grade, according to the scales indicated in the teaching guide.

The student will take a test of theory and problems during the revision period of the course. The date and time of this test will be fixed during the teaching of the subject.

- The test will consist of theoretical and practical questions or practical exercises. In order to pass the exams satisfactorily, a minimum mark of 40% of the maximum mark must be obtained in each part of the exam (theory and problems). In the event of not obtaining 40% in any of the parts, the lowest mark obtained will be considered as the final mark of the test.

The marks will not be averaged if any mark does not reach the value of 4.5 out of 10.0.

All the practical tests required during the course will be handed in through Moodle in digital format. The delivery format must be the one required in the instructions of the practical, preferably in pdf format.

Each practical will specify the required delivery format and deliveries in another format will not be accepted, and deliveries that do not meet the requirements will be graded with a 0, although they will count as delivered and will be averaged with the rest of the practical. The student will adjust it to the size (MB) that the platform allows to send. The student will have the deadline indicated in the teaching platform and deliveries after the deadline will not be accepted.

All delivery files must be named as required in the statement of the practical or assignment. Work that fails to comply with this requirement will be counted as having been handed in and will be graded with a 0 (averaging with the rest of the practicals).

The delivery of the practicals and assignments will be compulsory and it will be a requirement to obtain a minimum mark of 5 points in each of them in order to pass the practical block of the course.

If other activities are carried out, these may be additionally assessed to increase the final grade of the course, but they will never be used to pass it.

The second call and any extraordinary call will be a single test with questions of any kind.

In this call 100% of the grade will be that of the exam, but in order to pass the course it is essential to have passed the practical exercises of the course according to the criteria indicated in the teaching guide.

The level of the tests will be equal to or higher than that seen in the classroom so that the brightest students can opt for outstanding grades.

The examination may be video-recorded and any cheating or cheating may be checked afterwards. Existing ULE anti-fraud regulations will be strictly followed.

In the event that a student is shown to have copied, the current ULE regulations will be applied at all times or a file will be opened if appropriate.

The student will attend the exam or test after having read the exam regulations approved by the Governing Council of the University of León, which will be applied rigorously.

As a general rule, and unless otherwise specified, students will enter the examination room with only basic writing materials and a non-programmable calculator. In the event that any other additional material, such as a programmable calculator, notes, additional documentation or computer equipment, is permitted, this will be announced on the teaching platform.

Any other material: pencil cases, staplers, rucksacks, etc., except for warm clothes, will be kept in the hanger area or, failing that, in the area furthest away from the tables. Warm clothing will be placed on the coat racks provided for this purpose, and in any case all the tables and chairs in the classroom will be kept free.

It is expressly forbidden for pupils to have any communication device in the classroom: telephone, tablet, or similar.

It is expressly forbidden to talk to another student or request any type of material from them once they have entered the exam room.

The use of pencils and mechanical pencils is expressly forbidden; any annotations in red will be considered to be part of the teacher's notes during the correction or explanation phase.

It is not permitted to leave the examination room and re-enter it while a student is carrying out an exercise of the examination or test.

It is strictly forbidden to bring food or drink of any kind into the classroom except water.

It will be understood that a section of the problem is correct if the solution does not differ from the exact solution by more than 10% by excess or defect, the units are correct and the procedure followed by the student leads to the calculation noted in the box indicated. There will be no intermediate assessments in each section with independent marks.

Examination papers will not be corrected if they have been crossed out, erased, etc. or if they are illegible or do not comply with the specific requirements indicated in the examination.

Examination papers will not be corrected if they do not contain all the student's details: ID number, first name and 2 surnames.

Spelling mistakes of more than 5 will allow the teacher not to continue correcting the exam, given that some of the competences listed in this teaching guide are not fulfilled.

Any of the tests that may be taken in the course may be oral or written, and it is not necessary to give prior notice. Any test that must be taken outside the established dates and times in order to comply with higher-ranking legal provisions will always be oral in the presence of three or more members of the department.

The delivery of the examination outside the final time declared during the execution of the examination shall entitle the candidate not to correct the examination. When the exam is handed in, exams handed in within the agreed time will be separated from those handed in after the agreed time.

The revision of any test or examination shall be governed by the provisions of the examination regulations of the University of León. The revision will be carried out in writing, for which the student will be provided with the material he/she considers necessary to check the results of the exam, as well as a red biros. No other pen may be used during the revision of the exam. The student will be provided with a form in order to submit any allegations he/she may have. Personal connotations that have nothing to do with the development of the subject should be avoided and in any case these will not modify, in any case, the grade of the exam.

Once the review has been completed, the student's claims regarding the correction will be analysed. If appropriate, the mark will be modified and a mark modification report will be issued. The review of the examination can lead to either an increase or a decrease in the grade of any test. In the event that errors are detected that went unnoticed in the first correction, the mark may be modified downwards. This criterion may cause a student who initially passed to fail.

Type A	Code	Competences Specific
	A13753
	A13754
	A13755
	A13756
	A13757
	A13786
Type B	Code	Competences Transversal
	B3583
	B3584
	B3585
	B3586
	B3587
	B3600
	B3601
	B3602
	B3603
	B3604
	B3605
Type C	Code	Competences Nuclear
	C1
	C2
	C3
	C4
	C5

	Competences
The basic objective of this subject is the knowledge of the most important elements of Electrical Systems and the study of these systems in normal regime and in a balanced short-circuit situation. MV and HV switchgear and protections are studied in depth.	A13753 A13754 A13755 A13756 A13757 A13786	B3583 B3584 B3585 B3586 B3587 B3600 B3601 B3602 B3603 B3604 B3605	C1 C2 C3 C4 C5

Topic	Sub-topic
Block I: INTRODUCTION TO ELECTRICAL SYSTEMS	Topic 1: INTRODUCTION TO ELECTRICAL SYSTEMS. The current importance of the electricity sector at industrial and social level is highlighted. Advantages of electrical energy. An overview of the installations necessary for the production, transport and supply of electrical energy is provided. Topic 2: GENERATION SYSTEMS General study of electricity generation systems. Large power plants and distributed generation. Topic 3: GENERAL CHARACTERISTICS OF ELECTRIC LINES. Topology of electrical networks and classification of electrical lines.
Block II: ELECTRICAL SYSTEM ELEMENTS	Topic 1: CABLES AND ELECTRICAL LINES Calculation of cables, electrical parameters and power line models. Topic 2: TRANSFORMER BASES Types of transformer substations (T.C.), owner of the T.C. Types of transformers and mathematical models of transformers. Topic 3: ELECTRICAL SUBSTATIONS Types and function of electrical substations, elements of substations, switchgear.
Block III: ELECTRICAL SYSTEM ANALYSIS	Topic 1: REPRESENTATION OF ELECTRICAL SYSTEMS. Unit system. Unit analysis of transformers and power systems. Impedance and reactance diagrams. Single-line diagrams. Topic 2: LOAD FLOWS. Objective of load flow resolution. Resolution methods. Interpretation of results. Topic 3: CALCULATION OF THREE-PHASE SHORT CIRCUITS. Identification of short-circuit types, causes and effects. Analysis of three-phase short-circuits. Characteristic values of short-circuit currents.
Block IV: PRACTICES	P1: ELECTRICAL CALCULATION OF CABLES AND LINES P2: CALCULATION AND DESIGN OF A TRANSFORMER SUBSTATION P3: MECHANICAL CALCULATION OF POWER LINES

Methodologies :: Tests
	Class hours	Hours outside the classroom	Total hours
Problem solving, classroom exercises	8	10	18

Practicals using information and communication technologies (ICTs) in computer rooms	4	0	4
Personal tuition	1.5	0	1.5
Tutorship of group	1.5	1.5	3
PBL (Problem Based Learning)	4	8	12

Lecture	28	42	70

Mixed tests	4	0	4

(*)The information in the planning table is for guidance only and does not take into account the heterogeneity of the students.

	Description
Problem solving, classroom exercises	Development: Resolution of problems of varying complexity, developing all the steps in detail. Resources: Classroom equipment (video projector, computer, blackboard...).
Practicals using information and communication technologies (ICTs) in computer rooms	They take place in the computer classroom. Groups will be created with a very small number of students to prepare the corresponding internship report. Students will have at their disposal the documentation and material necessary to carry out the practicals. In this way, with the appropriate clarifications made by the teacher, the student is in a position to carry out the practical work. The students will take notes of the results and draw up a report which must contain the theoretical bases, the practical work, the results obtained and the particular conclusions of their work. Resources: Computer room equipped with specific electrical calculation software and general office automation software.
Personal tuition	The teacher will be available for students to ask questions, but a date and time must be arranged.
Tutorship of group	A group tutorial will be held in the classroom. The tutorials will serve to clarify questions about the content of the subject and will be carried out, preferably, through group tutorials, which will allow the total number of students to consolidate their knowledge as well as to take advantage of the synergies created by the consultations that take place.
PBL (Problem Based Learning)	Methodology that focuses on learning, on the research and reflection that students have to follow in order to obtain a solution to a problem posed by the teacher. The protagonists of learning are the students themselves as they take responsibility for being an active part of the process. The development of skills in the search for, handling and assimilation of information is favoured, at the same time as the pupils develop research skills since, starting from a statement, they have to find out and understand the situation posed and achieve an appropriate solution.
Lecture	The teaching methodology is based above all on the development of lectures and the completion of tasks with monitoring by the teacher. This is based on a constructivist conception of the teaching/learning process, according to which students develop significant learning. The use of computer media is also emphasised, among which the "Virtual Classroom" tool developed by the University of León stands out, which favours continuous communication between the teacher and the students. Development: They are developed by means of a blackboard class and multimedia presentation. A theoretical presentation of all the concepts included in the programme is given. Subsequently, the concepts are justified and their application to specific cases is shown. Resources: Classroom equipment (video projector, computer, blackboard, etc.).

	Description	Qualification
PBL (Problem Based Learning)	The evaluation will consist of the delivery of the resolution of an exercise (or case study). The following will be assessed: format, content and development. This activity may be individual or in teams as indicated by the teacher.	15%
Practicals using information and communication technologies (ICTs) in computer rooms	The evaluation will consist of the delivery of an internship report in which the format, content and development will be marked. The completion and submission of the report will be done individually or in groups according to the teacher's indications.	25%
Mixed tests	There will be at least one exam or written test to assess the student's acquisition of knowledge. The test/tests may include both theoretical contents exposed in the lectures as well as the resolution of problems and practical exercises. It is recommended to consult the proposed bibliography for the preparation of the exams. To pass the course it will be necessary to pass each of the blocks into which the content is divided individually.	60%

Other comments and second call
COMMENTS ON THE EVALUATION OF THE COURSE Assessment in the first call In the case of the evaluation in the first call, the practicals, whose delivery and passing with a minimum score of 5 points is compulsory to be able to take the exam, will count the percentage indicated in the evaluation criteria. In order to pass the subject at the first call, a minimum score of 5 points must be achieved in the overall weighted grade, according to the scales indicated in the teaching guide. Mixed exams The student will take a test of theory and problems during the revision period of the course. The date and time of this test will be fixed during the teaching of the subject. - The test will consist of theoretical and practical questions or practical exercises. In order to pass the exams satisfactorily, a minimum mark of 40% of the maximum mark must be obtained in each part of the exam (theory and problems). In the event of not obtaining 40% in any of the parts, the lowest mark obtained will be considered as the final mark of the test. - The marks for each exercise will be detailed in the statement. The marks will not be averaged if any mark does not reach the value of 4.5 out of 10.0. The maximum duration of the exam will be 3 hours. Submission of practical tests and assignments All the practical tests required during the course will be handed in through Moodle in digital format. The delivery format must be the one required in the instructions of the practical, preferably in pdf format. Each practical will specify the required delivery format and deliveries in another format will not be accepted, and deliveries that do not meet the requirements will be graded with a 0, although they will count as delivered and will be averaged with the rest of the practical. The student will adjust it to the size (MB) that the platform allows to send. The student will have the deadline indicated in the teaching platform and deliveries after the deadline will not be accepted. All delivery files must be named as required in the statement of the practical or assignment. Work that fails to comply with this requirement will be counted as having been handed in and will be graded with a 0 (averaging with the rest of the practicals). The delivery of the practicals and assignments will be compulsory and it will be a requirement to obtain a minimum mark of 5 points in each of them in order to pass the practical block of the course. The weight of the practical tests will be as indicated in the teaching guide. Other If other activities are carried out, these may be additionally assessed to increase the final grade of the course, but they will never be used to pass it. OTHER REMARKS AND SECOND and EXTRAORDINARY CALLS EXTRAORDINARY EXAM DATES The second call and any extraordinary call will be a single test with questions of any kind. In this call 100% of the grade will be that of the exam, but in order to pass the course it is essential to have passed the practical exercises of the course according to the criteria indicated in the teaching guide. A mark of 5.0 out of 10.0 in the exam will be required to pass the subject. ATTENDANCE AT INDIVIDUAL TESTS and REVIEWS Students will be provided with valid identification. The level of the tests will be equal to or higher than that seen in the classroom so that the brightest students can opt for outstanding grades. The examination may be video-recorded and any cheating or cheating may be checked afterwards. Existing ULE anti-fraud regulations will be strictly followed. In the event that a student is shown to have copied, the current ULE regulations will be applied at all times or a file will be opened if appropriate. The student will attend the exam or test after having read the exam regulations approved by the Governing Council of the University of León, which will be applied rigorously. As a general rule, and unless otherwise specified, students will enter the examination room with only basic writing materials and a non-programmable calculator. In the event that any other additional material, such as a programmable calculator, notes, additional documentation or computer equipment, is permitted, this will be announced on the teaching platform. Water may be brought in, in a transparent bottle. Any other material: pencil cases, staplers, rucksacks, etc., except for warm clothes, will be kept in the hanger area or, failing that, in the area furthest away from the tables. Warm clothing will be placed on the coat racks provided for this purpose, and in any case all the tables and chairs in the classroom will be kept free. It is expressly forbidden for pupils to have any communication device in the classroom: telephone, tablet, or similar. It is expressly forbidden to talk to another student or request any type of material from them once they have entered the exam room. The use of pencils and mechanical pencils is expressly forbidden; any annotations in red will be considered to be part of the teacher's notes during the correction or explanation phase. It is not permitted to leave the examination room and re-enter it while a student is carrying out an exercise of the examination or test. It is strictly forbidden to bring food or drink of any kind into the classroom except water. It will be understood that a section of the problem is correct if the solution does not differ from the exact solution by more than 10% by excess or defect, the units are correct and the procedure followed by the student leads to the calculation noted in the box indicated. There will be no intermediate assessments in each section with independent marks. Examination papers will not be corrected if they have been crossed out, erased, etc. or if they are illegible or do not comply with the specific requirements indicated in the examination. Examination papers will not be corrected if they do not contain all the student's details: ID number, first name and 2 surnames. Spelling mistakes of more than 5 will allow the teacher not to continue correcting the exam, given that some of the competences listed in this teaching guide are not fulfilled. Any of the tests that may be taken in the course may be oral or written, and it is not necessary to give prior notice. Any test that must be taken outside the established dates and times in order to comply with higher-ranking legal provisions will always be oral in the presence of three or more members of the department. The delivery of the examination outside the final time declared during the execution of the examination shall entitle the candidate not to correct the examination. When the exam is handed in, exams handed in within the agreed time will be separated from those handed in after the agreed time. The revision of any test or examination shall be governed by the provisions of the examination regulations of the University of León. The revision will be carried out in writing, for which the student will be provided with the material he/she considers necessary to check the results of the exam, as well as a red biros. No other pen may be used during the revision of the exam. The student will be provided with a form in order to submit any allegations he/she may have. Personal connotations that have nothing to do with the development of the subject should be avoided and in any case these will not modify, in any case, the grade of the exam. Once the review has been completed, the student's claims regarding the correction will be analysed. If appropriate, the mark will be modified and a mark modification report will be issued. The review of the examination can lead to either an increase or a decrease in the grade of any test. In the event that errors are detected that went unnoticed in the first correction, the mark may be modified downwards. This criterion may cause a student who initially passed to fail.

Basic	Stevenson, Williams D., Análisis de sistemas eléctricos de potencia , McGraw-Hill, 1981 Jesús Trashorras M., Desarrollo de redes eléctricas y centros de transformación, Paraninfo, 2013 Fermín Barrero, Sistemas de energía eléctrica, Paraninfo, 2004 Kothari, D. P., Sistemas eléctricos de potencia , McGrawHill Interamericana, 2008 Jesús Trashorras M., Subestaciones eléctricas, Paraninfo, 2015

Complementary	BUCHHOLD/HAPPOLDT, Centrales y redes eléctricas, Labor, S.A. , 1970 Jesús Trashorras M., Centros de transformación, Creaciones Copyright, 2009 CHECA, L. M, Líneas de transporte de energía, Boixareu Editores. Marcombo, 1973, EATON, J. R, Sistemas de transmisión de energía eléctrica, Ed. rentice/Hall Internacional, 1973, RAS, E, Teoría de líneas eléctricas de potencia, de comunicación, para transmisión en continua. Vol. I y II, Marcombo, 1986,