Synchronous Generator - Drawings

Contents

Entry

1 Initial data

2 Motor magnetic circuit. Dimensions, configuration, material

2.1 Configuration

2.2 Main Dimensions

2.3 Stator core

2.4 Rotor core

2.5 Core of a pole and polar tip

3 Stato-p winding

4 Magnetic circuit calculation

4.1 Aerial Oversight

4.2 Stator teeth

4.3 Stator back

44 Field-s

4.5 Roto-ra back

4.6 Air clearance in the field-sa joint

4.7 General parameters of magnetic zip

5 Active and inductive resistance of stator winding for

steady mode

6 Calculation of magnetic circuit at load

7 Excitation winding

8 Winding parameters and time constants. Resistance of stator windings

at steady state

8.1 Resistance of stator windings at steady state

8.2 Excitation winding resistance

8.3 Transient and super-transient resistance of the stack-torus winding

8.4 Resistance for reverse and zero sequence currents

8.5 Time-to-current constants

9 Losses and efficiency

10 Characteristics of machines

10.1 Short-circuit ratio

11 Thermal calculation of synchronous machine

11.1 Stator winding

11.2 Excitation winding

11.3 Ventilation Account

12 Mass and dynamic moment of inertia

12.1 Mas-sa

12.2 Dynamic moment of rote inertia

13. Mechanical calculation va-la

List of literature

Application

Summary

Synchronous machines are used in many sectors of the national economy, in particular, as generators in mobile and stationary electric stations, engines in installations that do not require speed control or require constant speed.

The most common design scheme of a synchronous machine with a rotating rotor, on which the newly expressed poles are located. Sometimes clear-pole synchronous machines of low power are made according to the design scheme of DC machines, that is, with poles located on the stator, the collector is replaced by contact rings.

Synchronous engines of the SD2 series and generators of the SG2 series are manufactured with a power of 132 to 1000 kW, at a rotation axis height of up to 450 mm, in the protected version IP23, with self-ventilation IC01, with a rotation speed of 500 to 1500 rpm.

Electric machines of the T2D and T2D series are designed for continued operation. Their excitation is carried out from a device powered by an additional winding embedded in the stator slots.

Introduction

Synchronous generators are used in mobile and stationary electric stations. The most common design scheme of generators with a rotating rotor, on which are located the newly expressed poles. Generators of the SG2 series are manufactured with a power of from 132 to 1000 kW at a rotation axis height of up to 450 mm, in the protected version IP23, with self-ventilation IC01, with a rotation speed of from 500 to 1500 rpm.

In the journal "Electricity" No. 8, 2004. the scientist R.V. Oronyan proposes a method that allows calculating the value of extreme deviations of voltages of an autonomous synchronous generator with sufficient accuracy for engineering calculations during a load discharge - a load outline. Knowing the extreme changes in voltage, you can use the formulas obtained in the article to calculate the value of inductive resistances along the transverse axis of the generator xq and x'q..

In the journal "Electricity" No. 10, 2004. scientist Dzhendubaev A.-Z.P presents a mathematical model that allows you to investigate the dynamic and static modes of the asynchronous generator, taking into account losses in steel of the stator and phase rotor. In a wide range of sliding changes, accounting for losses of phase rotor steel increases calculation accuracy.

A review of the reports of the 23rd session of the SIGRE (1970) addresses topical issues of the creation and operation of synchronous high-power generators and their excitation systems.

A. I. Abramov's book "Synchronous Generators" considers the main properties and behavior of synchronous generators in various operating modes that arise during operation. Requirements to excitation systems are given and necessity of introduction of excitation forcing in not all synchronous machines is shown in order to increase stability of power system operation. The issues of winding heating at steady-state modes and at excitation forcing are considered. Asynchronous mode of generator operation including asynchronous start-up issues is discussed in detail, calculation methods are given and experimental data are given.