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Постійне посилання колекціїhttps://dspace.nuft.edu.ua/handle/123456789/7522
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Документ Optimization of power supply system at food production enterprises(2014) Shesterenko, Volodymyr; Izvolenskiy, Igor; Mashchenko, Oleg; Shesterenko, AlexandraImprove the efficiency of reactive power compensation in food factories advisable by applying a two-level system control sources of reactive power. Підвищити ефективність компенсації реактивної потужності на харчових підприємствах доцільно шляхом застосування дворівневої системи керування джерелами реактивної потужності.Документ Research of the features of reactive power compensation in the combined system of food industry(2013) Shesterenko, Volodymyr; Sydorchuk, IrynaThe ways of increasing operation efficiency of reactive power compensation on the plants are considered. Small capacitor units may be connected at the individual loads. Greater power – factor corrective effect for a given total capacitor kilovolt – ampere will result with the capacitors located directly at each individual load, since the current is thereby reduced all the way from the load to the source. The first cost of an installation of individual capacitors will be greater, however, than that for one unit of the same total kilovolt – amperes located at a central point. The greater saving in operating expense due to individual capacitors must be weighed against their increased first cost. The locking circuit against high voltage is presented. The problems of its engineering implementation are considered. The expediency of the use of each synchronous motor for reactive power compensation. If the load factor of a synchronous motor is less than unity, economically expedient to use fully expected reactive power output. The need to apply the power of higher harmonics filters with a distortion factor is more than 8%, which is typical for plants with thyristor converters. Recent calculated from the calculated values of the distortion factor is based on the composition and level of harmonics.Документ Reactive power compensation in the combined system of sugar refinery electricity(2013) Shesterenko, Volodymyr; Sydorchuk, IrynaРозглянуто шляхи підвищення ефективності компенсації реактивної потужності на харчових підприємствах. Показано, що застосування конденсаторів індивідуальної компенсації дозволяє відмовитися від складних і дорогих пристроїв регулювання потужності конденсаторних установок, якими необхідно комплектувати установки централізованої компенсації на трансформаторних підстанціях, а захист двигуна від режиму самозбудження можна здійснити шляхом підключення конденсаторів до затискачів двигуна через автоматичний вимикач, обладнаний електромагнітом дистанційного відключення.We consider the ways of increasing operation efficiency of reactive power compensation on the plants. The basic aspects of standardized methods of power compensating devices choice, depending on the voltage and configuration of its individual elements are noticed. The expediency of each synchronous engine usage for reactive power compensation is shown. If the load factor of a synchronous engine is less than 1 (one), it is reasonable to use fully expected reactive power output. It is proved the necessity to apply the power higher harmonics filters with the distortion factor of more than 8%, which is typical for plants with thyristor converters. They are calculated from the computed value of the distortion factor which is based on the composition and level of harmonics. The calculation of filters should be started from the smallest harmonic filter. It is necessary to check the admissibility of filters loading with the current of proper harmonics. The total reactive power generating filters should be chosen from the condition of reactive power balance.