NONCOMMERCIAL JOINT STOCK COMPANY

ALMATY UNIVERSITY OF POWER ENGINEERING AND TELECOMMUNICATIONS

Department of “Power plants and electrical power engineering systems”

Calculation graphical work №3

On the discipline “Electromagnetic and electromechanical transient processes”

Speciality: 5B071800 - Electrical Power Engineering

Done by: Shaimuradov E. Group: EPEe-15-10 Student card: 154028

Checked by: associate professor Ospanova G. S.

_________ ___________ “___” __________ 2017

(score) (signature) (day) (month)

Content

Introduction 3

1 Tasks 4

2 Calculation of the dynamic stability of the electric power system 5

Conclusion 17

List of references 18

Introduction

Dynamic stability is the ability of a system to recover after a large disturbance of the initial state or a state close to the original (valid for operating conditions of the system). If after a large disturbance synchronous operation of the system is first disturbed, and then after allowable operating conditions for asynchronous progress is restored, I believe that the system has a resultant resistance.

Dynamic stability calculation is performed while maintaining unchanged the values of the transition EMF from the station generators. To check system dynamic stability you need on one chart to build three angular transmission characteristics of the normal (I) emergency (II) disaster, (III) modes of operation. The amplitude of these characteristics are determined by the equivalent circuit.

Calculation-graphical work №3

Objective of the work: the objective of the calculation graphical work is the development of independence in solving problems on the definition of dynamic stability of an electric power systems, as well as the development of skills in working with technical literature.

1 Tasks

Calculate the dynamic stability of a given electric power system (Fig. 3.1 ...3.4):

a) for a three-phase fault on a given line in the presence of an ARE of proportional type on generators;

b) for a two-phase short-circuit to earth on a given line in the presence of an ARV of a proportional type on generators;

c) calculate the angular power characteristics for the normal mode;

d) calculate the angular power characteristics for the emergency mode;

Initial data: The calculation-graphical task is performed by each student individually according to the given option. The variant number is chosen according to the last two digits of the student card. According to student card’s last two digits: option 48.

Figure 3.1 - Calculation scheme for options 1….10 and 41…50

Figure 3.2 - Calculation scheme for options 11….20 and 51…60

Figure 3.3 - Calculation scheme for options 21….30 and 61…70