Parameters and characteristics of low power generators for wind power plants on the basis of asynchronous motors with a short circuited rotor
Journal Title: Вісник Національного технічного університету "ХПІ". Серія: Проблеми удосконалювання електричних машин і апаратів. Теорія і практика - Year 2018, Vol 32, Issue 1308
Abstract
The technical literature provides conflicting recommendations on the use of asynchronous machines with a short-circuited rotor of industrial production in wind power plants of low power when operating in parallel with the network. This is primarily due to the imperfection of the method of calculating the characteristics of asynchronous machines on the T-shaped equivalent circuit. Improving the automated method for calculating asynchronous machines with a squirrel-cage rotor in motor and generator modes, analyzing the operation of asynchronous generators of low-capacity wind turbines based on industrial-grade asynchronous motors when the network voltage changes, developing recommendations for improving the characteristics of wind turbines is the goal of the paper. In the developed method of calculation the characteristics of an asynchronous machine are determined by the T-shaped equivalent circuit taking into account the nonlinear changes in its parameters. In the calculation algorithm for a given slip, as an independent variable the value of the resulting electromotive force is applied, which is further corrected by the network voltage, turbine power or motor power specified in the task. According to the results of the research, it has been established: the calculation of an asynchronous generator of a wind power installation at nominal network voltage and constant parameters of the equivalent circuit can lead to a significant error in determining the calculated generator power; an increase in the network voltage within the limits provided for in the Standard may lead to a decrease in the generator power up to 50% of the rated power of the asynchronous motor. Technical and economic indicators of the installation can be significantly improved by increasing the number of turns of the stator windings of the asynchronous machine with the allowable fill factor of the slot. The developed technique can be applied when designing asynchronous machines.
Authors and Affiliations
O. M. Galinovskyi
Keywords
Related Articles
- EP ID EP494214
- DOI 10.20998/2079-3944.2018.32.08
- Views 119
- Downloads 0
Parameters and characteristics of low power generators for wind power plants on the basis of asynchronous motors with a short circuited rotor
The technical literature provides conflicting recommendations on the use of asynchronous machines with a short-circuited rotor of industrial production in wind power plants of low power when operating in parallel with th...
Comparison of electromechanical parameters of an induction-dynamic motor and an electromagnetic motor
Comparison of electromechanical indicators of an induction-dynamic motor and an electromagnetic motor, designed to work as an actuator of electrical switchgears is carried out. Motors with the same weight and size parame...
Automation of control by feed-pumps of a 200 MW power unit
A review and analysis of control systems and relay protection of feed-pumps and technical requirements of them are carried out. Possibility of replacement of the relay control system is reasonable to the automatic system...
Status and perspectives of the multiphysical simulation of induction kitchen plates
Induction cookers are a relatively new class of modern electrical household appliances – kitchen electric stoves that heat metal dishes with eddy currents generated by an electromagnetic field with a frequency of 20-100...
Power transformer station 330/110 kV power lines in the presence of harmonics
Disabling or damage to overhead power lines of high and extra-high voltage (power lines) caused by various reasons, among which is not the last place is occupied by both natural factors - the effects of lightning and bir...