ОЦЕНКА ЭФФЕКТИВНОСТИ ПРИМЕНЕНИЯ ЧРП НА ОБЪЕКТАХ МАГИСТРАЛЬНЫХ НЕФТЕПРОВОДОВ ПО СНИЖЕНИЮ РАСХОДА ЭЛЕКТРОЭНЕРГИИ

Abstract

The use of variable frequency drive (VFD) is one of the main energy saving measures. In some industries and housing, and utilities of the energy savings when using VFD can reach 40% or more. Therefore, for optimization of operation modes of the main oil pipelines when using a VFD most attention is paid to energy criteria, the main of which is low power consumption. However, optimization of pumping units with a minimum of energy consumption reflects the efficiency of using the VFD only at a fixed number of VFD. When choosing the number of VFD for low power consumption may lead to increased frequency and consequently to increase the payback period. So the article with the optimization of main oil pipelines takes into account two criteria: the payback period and reducing energy consumption to VFD. The main factor, which allows achieving decrease in power consumption when using a VFD to exclude cyclic pumping is to increase the efficiency (efficiency) of pumps by reducing their speed. The article describes the method of calculating the reduction of energy consumption by increasing the efficiency of exploited oil. The methodology exception of cyclic transfer, when the use of VFD is aimed at reducing cyclical loading. So the first stage of estimation procedures is detection cyclic pumping and selection of the VFD to replace the cyclic pumping modes using a VFD. The application of the methodology on the example of two technological sections of trunk oil pipelines. operating now without the use of a VFD: the Reduction of power consumption is determined only by excluding cyclic pumping. It is shown that this by reducing energy consumption, the payback period for a VFD, even when using optimization calculations, is not less than 10 years. Therefore, to evaluate the effectiveness of the use of VFD when deciding about the appropriateness of the use of VFD it is necessary to consider not only the reduction of energy consumption, but other factors, such as the decline in the number of starts and reducing the cyclic loading of the pipeline internal pressure of the pumped product.