The mathematical model and a block diagram of a synchronous motor compressor unit with a system of automatic control of the excitation

Olimjon Toirov,Dilnoza Jumaeva,Sardor Urokov,Utkir Mirkhonov,Tulyagan Kamalov,V.A Golenishchev-Kutuzov

doi:10.1051/e3sconf/202128801083

Abstract

The general requirements for the automatic excitation control system of synchronous motors of a compressor unit are shown, taking into account its operating modes. A mathematical model is presented, a block diagram of the excitation circuits of a synchronous motor of a compressor unit and an exciter, which characterizes the feedback of the internal properties of this part of the system in dynamics. A block diagram of a closed-loop automatic excitation control system is obtained, taking into account the elasticity of the mechanical part and a hard blow in the compressor gas pipeline. The obtained structural diagrams make it possible to determine the transfer functions of the considered system in terms of control and disturbing influences, the characteristic equation, as well as the dependencies of various frequency characteristics, which make it possible to investigate the dynamic indicators (stability, control quality, etc.) of the system.

Highlights

IntroductionAs a rule, synchronous motors (SM) are used as a drive motor for compressors [1,2,3]
In large compressor stations, as a rule, synchronous motors (SM) are used as a drive motor for compressors [1,2,3]
Depending on the excitation current, reactive power can be supplied to the network and consumed from the network [7,8,9,10,11,12,13,14,15]

Summary

Introduction

As a rule, synchronous motors (SM) are used as a drive motor for compressors [1,2,3]. The main advantage of a synchronous motor over asynchronous motors is that by changing the excitation current of the SM, it is possible to change the reactive power. Depending on the excitation current, reactive power can be supplied to the network (during over excitation) and consumed from the network (under over excitation) [7,8,9,10,11,12,13,14,15]. Excitation systems must satisfy the operation of synchronous machines in normal and emergency conditions. They must provide [16,17]:

Objectives

Methods

Conclusion