Development of a System for Regulating the Excitation of Synchronous Generators of Factory Power Plants Connected to a Powerful Energy System

Currently, there is a fairly active expansion of distributed generation objects to increase the reliability of the power supply of industrial enterprises. The work of such generators is often carried out in a parallel with a high -power power system, which determines the low influence of the source on the voltage level on its tires. Due to the increase in energy generating nodes, the requirements for automatic regulation of excitement increase significantly. In such conditions, the automatic regulation of the excitation of industrial synchronous generators impose ambiguous requirements. Firstly, it is necessary to maintain a given voltage on the tires, and secondly, a given level of static and dynamic stability should be provided, which cannot always be feasible. Thus, on the one hand, pathogens of industrial synchronous machines are being improved, and on the other hand, the laws of automatic regulation of excitement become bulky and complex. Due to the aforementioned requirements, high interest these days are of adaptation of excitation regulation systems to industrial generators and operating conditions. In this work, the law of excitation regulation, adapted to the conditions of factory power supply, was developed and shown when working in parallel with a high -power power system. It allows maintaining a standard voltage level when ensuring static and dynamic stability and takes into account the restrictions related to the load diagram and the imperfection of the cooling of excitation systems. In order to verify the effectiveness of the law of regulation of excitation, studies of static stability were carried out on the mathematical model of the synchronous generator developed in the Matlab environment with various voltage subsidence from the power supply system. Recommendations are given on the adaptation of automatic control systems for excitation systems at factory power plants in order to increase stability.

I. Introduction

Modern working conditions and operation of industrial enterprises require a sufficiently large expansion of their own sources of distributed generation. This trend is due to the need to increase the reliability of consumer power supply and reduce the cost of production. The type of industrial power plant and its installation location depend on the connection point, the consumer category in terms of the reliability of power supply and the degree of load growth, as well as the type of fuel used. At present, in addition to traditional thermal power plants, gas turbine, gas piston and steam -gas plants with synchronous generators of various capacities are being introduced.