scholarly journals THE ELECTRIC DRIVE PUMPING UNITS STEADY OPERATING MODES OPTIMIZATION BY THE MODES RELIABILITY CRITERIAS

2019 ◽  
pp. 24-32
Author(s):  
I. I. Yaremak
Keyword(s):  
Centrifugal Pump ◽  
Electric Drive ◽  
Operation Mode ◽  
Working Fluid ◽  
Pump Unit ◽  
Pumping Station ◽  
Operating Modes ◽  
Pumping Unit ◽  
Reliability Of Operation ◽  
Pumping Units

According to the research results, the target functions of the task of optimizing the functioning of the units according to the criteria of the regime reliability, depending on the flow of the working fluid were synthesized, which made it possible to research the influence of the regime on the reliability of operation of electric and hydraulic subsystems of the pump unit. The extreme weight of local target functions of regime reliability of electric motor and the centrifugal pump in various (especially low-flow rate) operating modes are determined. It is proposed to optimize the operating modes of  pumping units of oil pumping station with the simultaneous use of the reliability criteria of electric drive and centrifugal pump. . It was established that the maximum values of reliability of electric drive and centrifugal pump are achieved at different values of the load, which requires the involvement of multi-criteria optimization methods. The problem of optimization of the established modes of the pump unit in the multicriteria setting, taking into account the technological limitations of its subsystems was formalized. The analysis of modern methods of solving the problem of multicriteria optimization of the steady modes of operation of pump units is carried out. The method of solving the multicriterion optimization problem is substantiated, which fully takes into account the influence of operation mode on the reliability of electric and hydraulic subsystems of pumping unit. It is revealed that the most appropriate method for solving this problem is the method of approaching an ideal (utopian) point in the criteria space. With this method, the desired ratio of criteria at the optimum point is the best. The value of the "agreed optimum" of liquid flow has been determined in order to choose the optimum for the reliability of operation mode of the pumping unit of oil pumping station.

scholarly journals Computer Modeling of Pumping Station with Unregulated Electric Drive

2020 ◽  
Vol 220 ◽  
pp. 01039
Author(s):  
Shakhboz Dadabaev ◽  
Elena Gracheva
Keyword(s):  
Electric Drive ◽  
Electromagnetic Torque ◽  
Electric Motors ◽  
Motor Speed ◽  
Electric Drives ◽  
Pumping Station ◽  
Soft Start ◽  
Soft Starter ◽  
Pumping Units ◽  
Static Torque

The results of the analysis of transient and technological processes of the irrigation pumping station of the first lift, taking into account the negative starting effects on the synchronous electric drive, are considered. The analysis and review of the ways of regulating the performance of the units of the irrigation pumping station of the first lift are made, and the main difficulties of the existing methods of regulating the pump supply are revealed. Computer simulation of starting modes of high-voltage synchronous electric motors with direct and soft start, where soft starter was used for soft start, was carried out. The simulation took into account the changes in the currents of all phases of the electric motor, the electromagnetic torque, the motor speed, the effective value of the current, as well as the static torque. The introduction of semiconductor soft starters for electric drives of high-power pumping units has been substantiated.

EVALUATION OF DIAGNOSTIC PARAMETERS OF THE ELECTRO-PARAMETRIC METHOD FOR CONTROLLING THE ALIGNMENT OF SHAFTS OF CENTRIFUGAL PUMPING UNITS

2019 ◽  
pp. 38-45
Author(s):  
I. Yu. Bykov ◽  
Z. H. Yagubov ◽  
P. S. Shichev
Keyword(s):  
Centrifugal Pump ◽  
Parametric Method ◽  
Regression Equations ◽  
Diagnostic Parameter ◽  
Vibration Level ◽  
Pump Unit ◽  
Diagnostic Parameters ◽  
Pump Head ◽  
Pumping Units ◽  
Multiple Units

The article contains the results of a research by definition diagnostic parameters necessary for the development of an electroparametric method for monitoring of the shafts misalignment in centrifugal pumping units. An experimental research was performed using a overhung centrifugal pump unit K 20/30 and measuring equipment. In its turn is determined function of the dependence the relative amplitude of the informative harmonic in the spectrum of the current of the electric motor phase from the parameter of the overall vibration level of a centrifugal pump unit. This function makes it possible to set the values of the diagnostic parameter for the boundaries of the technical state zones of the pump unit, which correspond to the values of the parameter of the general vibration level, in the event of the shafts misalignment. In mathematical modeling of a centrifugal pumping unit, made imitation of mechanical defect on the shaft when changing the value of the relative pump head and operating parameters for multiple units. As a result of modeling were obtained regression equations of the dependencies of the diagnostic parameter on the parameter imitation of defect at different values pump head and for multiple units.

scholarly journals Improving the Efficiency of Distributed Water Supply Systems by Means of an Adjustable Electric Drive

2021 ◽  
Vol 24 (5) ◽  
pp. 19-34
Author(s):  
Mykola Moshnoriz ◽  
Serhiy Babiy ◽  
Alexander Payanok ◽  
Alexey Zhukov ◽  
Dmytro Protsenko
Keyword(s):  
Water Supply ◽  
Control Systems ◽  
Electric Drive ◽  
Electrical Network ◽  
Effective Control ◽  
Water Supply Systems ◽  
Pipeline Network ◽  
Pumping Station ◽  
Pumping Units ◽  
The Impact

The water supply of the pumping station must meet the needs of the consumer which change during the day. Therefore, its performance needs to be adjusted. Any deviation of the pump unit’s performance from the nominal value leads to additional energy costs. Under such conditions, great importance is paid to optimising the operation of electric drives of the water supply pumping station. To regulate the performance of a pumping station, it is often resorted to changing the number of operating pumping units, the engines of which are started directly from the electrical network. Medium-and high-power engines are subject to technical restrictions for a direct start, which are supplemented by the need to maintain pauses between starts. Therefore, when ensuring the desired value of pumping station performance, it is very important to consider the features of starting pump engines. Control systems are widely used in the field of electric drive and water supply. It is in these areas that the efficiency of the control system depends on the amount of electricity that will be consumed by the technological process or the reliability of its operation. It is known that pumps account for about half of all energy produced. Therefore, the issue of effective control systems is particularly relevant in the field of water supply. The purpose of this study is to increase the reliability and efficiency of the water supply system by considering the distribution properties of the pipeline network when controlling electric pump drives, which will allow coordinating the operation of the pumping station, the pipeline network, and the consumer. To achieve this purpose, the study was conducted to assess the impact of the distribution and length of the pipeline network. The system of water supply and distribution is analysed, what criteria affect the correct performance of work and what problems may arise during operation for a long period of time are investigated. Ways to optimise the operation of pumping stations to increase their energy efficiency and cost-effectiveness of installations are investigated. The main reasons for the expediency of using an adjustable electric drive to control pumping units are considered

scholarly journals Investigation of a full-size damper for an electrically driven centrifugal pump for oil production

2021 ◽  
pp. 31-36
Author(s):  
S. G. Zubairov ◽  
◽  
R. R. Yakhin ◽  
A. N Zotov ◽  
T. I. Salikhov ◽  
...  
Keyword(s):  
Centrifugal Pump ◽  
Experimental Studies ◽  
Oil Production ◽  
Forced Vibrations ◽  
Vibration Velocity ◽  
Pump Unit ◽  
Full Size ◽  
Constructive Solution ◽  
Pumping Unit

The article describes a way to combat fatigue effects in the details of connecting modules of an electric driven centrifugal pump unit for oil production. A constructive solution for implementing the method in relation to complex downhole conditions in the form of a multifunctional damper using a differential piston to transfer it from the transport position when lowering into the well into the working one is shown. For a full-size damper, experimental studies of its vibration- isolating characteristics have been carried out when used in the form of substrates for supporting arms of elastomers of various densities and compositions. The preferred characteristics of elastomers and their ranking for various frequencies of forced vibrations are determined. Keywords: module, connection parts; electrically driven centrifugal pump unit; electrocentrifugal pumping unit; differential piston; damper; sbstrate; vibration velocity.

Optimum Design of Double-Well Pumping Units Based on Calculation of MATLAB Optimization Toolboxes

2012 ◽  
Vol 479-481 ◽  
pp. 694-698
Author(s):  
Wen Tao Qu ◽  
Dong Sheng Liao ◽  
Tao Ren ◽  
Wen Sun
Keyword(s):  
Simulation Optimization ◽  
Structural Parameters ◽  
Matlab Simulation ◽  
Pump Unit ◽  
System Parameters ◽  
Pumping System ◽  
Conventional Design ◽  
Pumping Unit ◽  
Pumping Units ◽  
New Generation

Beam double-well pump unit as a new generation of pumping unit is currently used in mechanical oil production. However, due to a number of pumping system parameters, the conventional design can not achieve the optimal pumping system parameters Using MATLAB simulation optimization algorithms, simulates the structural parameters, rod speed, rod acceleration, rod load, crank torque factors and gear’s crank shaft net torque of the double horse head double-well pumping unit, achieving optimal design of double horse head double-well pumping system, with the existing conventional design of double horse head double-well pumping unit, double horse head double-well pumping unit has a great improving than conventional pumping unit in motion and power dynamic characteristics.

ANALYSIS OF THE OPERATION OF PUMPING UNIT UNDER A RANGE OF DIFFERENT LOADS

2019 ◽  
pp. 263-267
Author(s):  
Antoaneta Dimitrova
Keyword(s):  
Electric Motor ◽  
Energy Efficient ◽  
Frequency Converter ◽  
Hot Water ◽  
Maximum Efficiency ◽  
Pump Unit ◽  
Start Up ◽  
Different Types ◽  
Pumping Unit ◽  
Pumping Units

The report analyzes the work of a pumping unit from the hot water installation of the Faculty of Technics and Technologies - Yambol, Bulgaria, under different load conditions. Simulation stands have been adapted that are suitable for analyzing the performance of motors of different types and depending on how they are put into the pump unit. It was found that when the energy inefficient electric motor is directly started, the maximum efficiency is 79,63% and is achieved at 100% of its load. When using a frequency converter, at 100% of its load, the efficiency is 86,83%. The proposed energy-efficient electric motor, with direct start-up, has the highest efficiency of 86,7%. The obtained results can be used in the modernization of the hot water installation of the Faculty of technics and Technologies - Yambol, in the part “pumping units”.

scholarly journals Energy efficient water pumping installation on the basis of frequency-regulated electric drive

2021 ◽  
pp. 81-96
Author(s):  
P. Klendiy ◽  
◽  
L. Kolodiychuk ◽  
O. Dudar ◽  
◽  
...  
Keyword(s):  
Water Supply ◽  
Control Systems ◽  
Water Consumption ◽  
Electric Drive ◽  
Water Losses ◽  
Automatic Control Systems ◽  
Operating Modes ◽  
Water Pumping ◽  
Unit Energy ◽  
Pumping Units

Electric pumping units are not characterized by optimal operating modes and today are energy-intensive technologies. Water consumption is determined by unevenness and is formed under the influence of many, often uncontrollable factors. The inconsistency of the planned water supply regime with the actual water consumption leads to excessive pressures, which causes not only direct overconsumption of electricity at pumping stations, but also increases the likelihood of accidents in the network, contributes to greater water losses due to leaks in the water supply network. additional overconsumption of electricity consumed by pumping units to compensate for pressure loss. With the right choice of electric pump unit, its mechanical characteristics and power of the motor are designed to provide the required pressure in the system at maximum water consumption (morning and evening). At other times of the day, due to the decrease in water consumption, the pressure in the system increases and it is necessary to cover the throttle valve, and this requires constant rotation near it and is accompanied by electricity losses. In electric pumps, which are equipped with an unregulated electric drive, the flow control is carried out in almost the only traditional way - throttle on the discharge side. The paper reveals the need for transition from throttle control systems of pump units to automatic control systems by automatically maintaining the required technological parameter, in particular, the pressure at the flow rate of changing water due to the use of frequency-regulated asynchronous electric drives. Keywords: water pumping unit, energy consuming technologies, throttling, frequency-regulated electric drive

SIMULATION OF SOFT START OF SYNCHRONOUS ELECTRIC DRIVES

2019 ◽  
Author(s):  
Shakhboz Dadabaev
Keyword(s):  
Computer Simulation ◽  
Electric Drive ◽  
Water Supply Systems ◽  
Factors Affecting ◽  
Electric Drives ◽  
Soft Start ◽  
Simulation Results ◽  
Pumping Units ◽  
Negative Factors ◽  
Supply Systems

The main negative factors affecting the starting modes of synchronous electric drives of pumping units of irrigation water supply systems were identified, computer simulation of direct and soft start of synchronous electric drive was made, the simulation results are shown in graphs and a brief conclusion was made on the study.

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