Variable-speed-drive-based sensorless estimation of pump system reservoir fluid level

Pöyhönen, Santeri; Simola, Aleksi; Ahola, Jero

doi:10.23919/epe20ecceeurope43536.2020.9215786

“…It was revealed that the optimal method for controlling the performance of the first rise pump is frequency regulation of asynchronous motor according to the scalar principle [21][22][23][24][25][26][27][28][29][30][31][32][33]; this method is considered in the current research work. Additional measures can also be used to maintain the required temperature in the pipeline, such as the use of passive insulation, active heating, pipeline burying, etc.…”

Section: Introductionmentioning

confidence: 99%

Simulation Modeling of First Rise Section of Water Supply System with Installed Complex of Automatic Pump Performance Control

Palkin

¹

,

Suvorov

²

2021

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The article considers the important problem of technical and economic optimization of the operating modes of the first rise section of water supply systems. At the same time, the task is to minimize the costs associated with the excessive operation of pumps, while providing the protection of the pipeline from freezing in harsh natural operating conditions. To solve this problem, a computer simulation model was developed for the first rise section, equipped with a pump performance control system. The main differences of the developed model are: integrated approach to the analysis of parameters of various physical nature, assessment of the object economic indicators, possibility of simulating non-standard control algorithms. Preliminary studies of the model have shown the possibility and feasibility of its application for calculating the optimal parameters and operating modes of the object under consideration. Based on the simulation results, it was revealed that to calculate the control action by level, it is advisable to use the PID law, for temperature—PD law, for flow rate—PI law. To calculate the main control action, it is proposed to simultaneously calculate the actions in terms of level and temperature, followed by bringing the larger of them to the value of the setpoint for the flow rate maintained by the flow controller. The studies of the proposed management concept for the first rise section have shown its high technical and economic efficiency. In particular, the savings in electricity consumption are estimated at about 55.2% while providing pipeline frost protection.

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“…Решением описанных проблем существующих систем водоснабжения является использование систем автоматического управления производительностью электроприводов насосов. Обзор существующих решений показал, что наиболее эффективно данная задача решается путем частотного регулирования электропривода насоса [4][5][6][7][8][9][10]. При этом изменяется частота питающего напряжения, что пропорционально влияет на гидравлические параметры насоса.…”

Section: Introductionunclassified

Research of the optimal method of control of the first rise pumps electric drives operated in conditions of negative temperatures

Palkin

¹

,

Gaysin

²

2021

«Izvestiya vysshikh uchebnykh zavedenii. PROBLEMY ENERGETIKI»

0

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OBJECT. The work is aimed at solving an important problem of increasing the economic efficiency, the level of resource saving and accident-free operation of the first rise section of the centralized water supply systems of small and medium-sized settlements. At the same time, the task is to minimize the cost of electricity associated with the excess performance of pumps, while ensuring the protection of the pipeline from freezing in conditions of negative ambient temperatures. METHODS. To solve this problem, an optimal method for controlling electric drives of first rise pumps at the request of the end user of water was developed, which differs from the existing ones by analyzing the state of the thermal parameters of the pipeline. The method is based on the calculation of control actions based on the water level in the storage reservoir or the water pressure in the pipeline UL and the water temperature at the end of the pipeline UT, followed by the calculation of the optimal pump supply setpoint, which is then maintained by the frequency control method. The Matlab® Simulink simulation model was used to determine the optimal laws for calculating control actions and evaluate the effectiveness of the proposed solutions. RESULTS. Based on the simulation results, it was found that it is advisable to use the PID law for calculating the control effect for the UL level, the PD law for the UT temperature, and the PI law for the flow rate. The parameters of the technological process and the level of power consumption in the control process were also evaluated. CONCLUSIONS. Studies of the proposed concept of managing the first rise section have shown high technical and economic efficiency, in particular, the savings in electricity consumption are estimated at about 22 % while ensuring the protection of the pipeline from freezing.

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“…Решением описанных проблем существующих систем водоснабжения является использование систем автоматического управления производительностью электроприводов насосов. Обзор существующих решений показал, что наиболее эффективно данная задача решается путем частотного регулирования электропривода насоса [4][5][6][7][8][9][10]. При этом изменяется частота питающего напряжения, что пропорционально влияет на гидравлические параметры насоса.…”

Section: Introductionunclassified

Research of the optimal method of control of the first rise pumps electric drives operated in conditions of negative temperatures

Palkin

¹

,

Гайсин

²

2021

«Izvestiya vysshikh uchebnykh zavedenii. PROBLEMY ENERGETIKI»

0

View full text Add to dashboard Cite

OBJECT. The work is aimed at solving an important problem of increasing the economic efficiency, the level of resource saving and accident-free operation of the first rise section of the centralized water supply systems of small and medium-sized settlements. At the same time, the task is to minimize the cost of electricity associated with the excess performance of pumps, while ensuring the protection of the pipeline from freezing in conditions of negative ambient temperatures. METHODS. To solve this problem, an optimal method for controlling electric drives of first rise pumps at the request of the end user of water was developed, which differs from the existing ones by analyzing the state of the thermal parameters of the pipeline. The method is based on the calculation of control actions based on the water level in the storage reservoir or the water pressure in the pipeline UL and the water temperature at the end of the pipeline UT, followed by the calculation of the optimal pump supply setpoint, which is then maintained by the frequency control method. The Matlab® Simulink simulation model was used to determine the optimal laws for calculating control actions and evaluate the effectiveness of the proposed solutions. RESULTS. Based on the simulation results, it was found that it is advisable to use the PID law for calculating the control effect for the UL level, the PD law for the UT temperature, and the PI law for the flow rate. The parameters of the technological process and the level of power consumption in the control process were also evaluated. CONCLUSIONS. Studies of the proposed concept of managing the first rise section have shown high technical and economic efficiency, in particular, the savings in electricity consumption are estimated at about 22 % while ensuring the protection of the pipeline from freezing.

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Variable-speed-drive-based sensorless estimation of pump system reservoir fluid level

Cited by 4 publications

References 11 publications

Simulation Modeling of First Rise Section of Water Supply System with Installed Complex of Automatic Pump Performance Control

Simulation Modeling of First Rise Section of Water Supply System with Installed Complex of Automatic Pump Performance Control

Research of the optimal method of control of the first rise pumps electric drives operated in conditions of negative temperatures

Research of the optimal method of control of the first rise pumps electric drives operated in conditions of negative temperatures

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