Influence of the electric drive control system on the sucker-rod pump energy efficiency

UDK: 62-83:622.276.3
DOI: 10.24887/0028-2448-2020-2-50-53
Key words: sucker-rod pump, electric drive control system, energy-efficiency
Authors: E.M. Solodkiy (Perm National Research Polytechnic University, RF, Perm), V.P. Kazantsev (Perm National Research Polytechnic University, RF, Perm), A.V. Hudorozhkov (Sputnic Group, RF, Perm), A.V. Churin (Sputnic Group, RF, Perm)

This paper describes dependence of the energy consumption characteristics of the sucker-rod pump on the use of various asynchronous electric drive control technique. To analyze the profile of the power consumption of the pumping unit drive during the swing cycle, the simulation of system components was used: the electric drive control in conjunction with the autonomous voltage inverter, the kinematics of the four-link pumping mechanism, and the polished rod load. When simulating the dynamic load on a polished rod, which determines the force at the suspension point of the rod string, the influence of the additional stress caused by wave processes in the rod string was taken into account, which was calculated according to the model proposed by A.S. Virnovsky. When calculating the torque on the pumping jack crank, the procedure for calculating the maximum torque of the rotary counterweight is proposed, this ensures equalization of the maximum torques when the plunger moves up and down. The developed complex model of the sucker-rod pumping unit together with the models of the electric drive control system and the induction motor drive allows the calculation of the energy efficiency of the installation under various operating conditions. In this case, the model of the electric drive control system can be used not only to analyze the efficiency of the control technique (scalar or vector), but also to test the control algorithms for the sucker-rod pumping unit prime mover electric drive. The main regularities in the consumption of active power were revealed depending on the control technique, as well as the possibility of optimizing the electric power consumption of the electric drive control system over the swing cycle. Methodological approaches to the solution of the control system synthesis problem that provide a significant increase in the energy efficiency of the pumping unit electric drive with frequency control common for all types of balanced pumping jacks are proposed.

References

1. Virnovskiy A.S., Teoriya i praktika glubinnonasosnoy dobychi nefti (Theory and practice of bottomhole pumping), Moscow: Nedra Publ., 1971, 184 p.

2. Tarasov V.I., Kaverin M.N., Yakimov S.B., Comparison of energy consumption for various mechanized production methods for a number of enterprises of Rosneft (In Russ.), Nauchno-tekhnicheskiy vestnik OAO “NK “Rosneft'”, 2014, no. 3, pp. 5–11.

3. Takacs G., Sucker rod pumping manual, PennWell Corp., 2003, 395 r.

4. Galimov P.C., Khamitov P.A., Takhautdinov R.Sh. et al., Automated selection management of mechanized oil and gas production wells (In Russ.), Avtomatizatsii v promyshlennosti, 2004, no. 3, pp. 3–7.

5. Patent no. US6414455B1, System and method for variable drive pump control, Inventor: Watson A.J.

6. Solodkiy E.M., Dadenkov D.A., Kazantsev V.P., Sensorless energy-efficient control system of the sucker-rod pump, Proceedings of X International Conference on Electrical Power Drive Systems (ICEPDS 2018), Russia, Novocherkassk, 3–6 October 2018, New York: IEEE Publ., 2018.

7. Gibbs S.G., Rod pumping. Modern methods of design, diagnosis and surveillance, Ashland, OH: BookMasters Inc., 2012, 682 p.

8. Solodkiy E.M., Dadenkov D.A., Modelling of voltage source inverter based on IGBT using space vector Pulse-width modulation technique (In Russ.), Informatsionno-izmeritel'nye i upravlyayushchie sistemy, 2014, V. 12, no. 9, pp. 45–51.

9. Virnovskiy A.S., Gutenmakher L.I., Korol'kov N.V., Electrical simulation of a deep pump installation (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 1951, no. 11, pp. 30–34.

This paper describes dependence of the energy consumption characteristics of the sucker-rod pump on the use of various asynchronous electric drive control technique. To analyze the profile of the power consumption of the pumping unit drive during the swing cycle, the simulation of system components was used: the electric drive control in conjunction with the autonomous voltage inverter, the kinematics of the four-link pumping mechanism, and the polished rod load. When simulating the dynamic load on a polished rod, which determines the force at the suspension point of the rod string, the influence of the additional stress caused by wave processes in the rod string was taken into account, which was calculated according to the model proposed by A.S. Virnovsky. When calculating the torque on the pumping jack crank, the procedure for calculating the maximum torque of the rotary counterweight is proposed, this ensures equalization of the maximum torques when the plunger moves up and down. The developed complex model of the sucker-rod pumping unit together with the models of the electric drive control system and the induction motor drive allows the calculation of the energy efficiency of the installation under various operating conditions. In this case, the model of the electric drive control system can be used not only to analyze the efficiency of the control technique (scalar or vector), but also to test the control algorithms for the sucker-rod pumping unit prime mover electric drive. The main regularities in the consumption of active power were revealed depending on the control technique, as well as the possibility of optimizing the electric power consumption of the electric drive control system over the swing cycle. Methodological approaches to the solution of the control system synthesis problem that provide a significant increase in the energy efficiency of the pumping unit electric drive with frequency control common for all types of balanced pumping jacks are proposed.

References

1. Virnovskiy A.S., Teoriya i praktika glubinnonasosnoy dobychi nefti (Theory and practice of bottomhole pumping), Moscow: Nedra Publ., 1971, 184 p.

2. Tarasov V.I., Kaverin M.N., Yakimov S.B., Comparison of energy consumption for various mechanized production methods for a number of enterprises of Rosneft (In Russ.), Nauchno-tekhnicheskiy vestnik OAO “NK “Rosneft'”, 2014, no. 3, pp. 5–11.

3. Takacs G., Sucker rod pumping manual, PennWell Corp., 2003, 395 r.

4. Galimov P.C., Khamitov P.A., Takhautdinov R.Sh. et al., Automated selection management of mechanized oil and gas production wells (In Russ.), Avtomatizatsii v promyshlennosti, 2004, no. 3, pp. 3–7.

5. Patent no. US6414455B1, System and method for variable drive pump control, Inventor: Watson A.J.

6. Solodkiy E.M., Dadenkov D.A., Kazantsev V.P., Sensorless energy-efficient control system of the sucker-rod pump, Proceedings of X International Conference on Electrical Power Drive Systems (ICEPDS 2018), Russia, Novocherkassk, 3–6 October 2018, New York: IEEE Publ., 2018.

7. Gibbs S.G., Rod pumping. Modern methods of design, diagnosis and surveillance, Ashland, OH: BookMasters Inc., 2012, 682 p.

8. Solodkiy E.M., Dadenkov D.A., Modelling of voltage source inverter based on IGBT using space vector Pulse-width modulation technique (In Russ.), Informatsionno-izmeritel'nye i upravlyayushchie sistemy, 2014, V. 12, no. 9, pp. 45–51.

9. Virnovskiy A.S., Gutenmakher L.I., Korol'kov N.V., Electrical simulation of a deep pump installation (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 1951, no. 11, pp. 30–34.



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