Abstract
One of the key requirements for maintaining the normal operating mode of a factory power plant is ensuring its economically feasible parameters. One such indicator is the voltage level on the generator switchgear busbars. This determines the power consumption of the power plant own power and that of the industrial facilities powered by the generator busbars, which has a positive regulatory effect. Changes in power flow distribution due to the static characteristics of the load are accompanied by changes in network losses. Therefore, determining an economically feasible voltage level will improve the efficiency of the power plant by taking this factor into account when selecting the settings of the automatic excitation control systems of the factory synchronous generators. To determine the economically feasible voltage on the generator switchgear busbars of a factory power plant, a methodology has been developed that also takes into account the generator static stability and voltage limitations at a given network point. The research was conducted using a factory power plant with several generators with a capacity of up to 50 MW, five transformation stages and a distributed load. Calculations of steady-state conditions and power losses were conducted using the KATRAN software package and revealed that the shop load and auxiliary consumers of the combined heat and power plant under consideration have significantly different control effects and require different voltage levels to ensure an economically feasible voltage level. The reactive power output, which depends on a large number of factors, also significantly impacts the level of energy losses in network elements. The developed methodology can be applied to industrial power plants to improve their operational efficiency.
Keywords
industrial power plant, automatic voltage regulation, economically feasible voltage, power plant auxiliary needs, load regulation effect
1. Igumenshchev V.A., Malafeev A.V., Panova E.A., Varganova A.V., Gazizova O.V., Kondrashova Yu.N., Zinoviev V.V., Yuldasheva A.I., Krubtsova A.A., Anisimova N.A., Nasibullin A.T., Tremasov M.A., Shcherbakova V.S., Bogush V.K. Programma «Kompleks avtomatizirovannogo rezhimnogo analiza KATRAN 10.0» [Program "Complex of automated regime analysis KATRAN 10.0"]. Computer program RF, no. 2019610251, 2019. (In Russian)
2. Eroshenko S.A., Karpenko A.A., Kokin S.E., Pazderin A.V. Scientific problems of distributed generation. Izvestiya vysshih uchebnyh zavedenij. Problemy energetiki [Power engineering: research, equipment, technology], 2010, no. 11-12, pp. 126-133. (In Russian)
3. Kosarev B. A. Metodiki upravleniya decentralizovannymi elektrotekhnicheskimi sistemami s raspredelennoj generaciej. Kand. Diss. [Methods of controlling decentralized electrical systems with distributed generation. Kand. Diss.]. Omsk, 2004. 185 p. (In Russian)
4. Ershov M.S., Egorov A.V., Trifonov A.A., Rudina E.I. Some issues of stability of industrial electrical systems with auxiliary generators. Promyshlennaya energetika [Industrial power engineering], 2006, no. 8, pp. 21 – 25. (In Russian)
5. Lokhanin E.K., Rossovsky E.L., Garayev Yu.N., Moroshkina Yu.V., Glagoleva V.A. Some issues of analysis of static stability of electric power systems. Elektrichestvo [Electrical Technology Russia], 2013, no. 9, pp. 2-6. (In Russian)
6. Gazizova O.V., Kondrashova Yu.N., Malafeev A.V. Improving the efficiency of control of industrial power plant modes by predicting static and dynamic stability when changing the network configuration. Elektrotekhnicheskie sistemy i kompleksy [Electrotechnical Systems and Complexes], 2016, no. 3 (32), pp. 27-38. (In Russian). doi: 10.18503/2311-8318-2016-3(32)-27-38
7. Gazizova O.V., Varganova A.V., Malafeev A.V., Patshin N.T., Koryakin A.L. Taking into account the static stability of synchronous generators in the problem of planning optimal modes of own power plants for reactive power. Vestnik YUzhno-Uralskogo gosudarstvennogo universiteta. Seriya: Energetika [Bulletin of the South Ural State University. Series "Power engineering"], 2019, vol. 19, no. 3, pp. 23-33. (In Russian). doi: http://dx.doi.org/10.14529/power190303
8. Djibrin E. Abakar, Abouelsoud A.A., Michael S.J., Simiyu S. Transient stability analysis of the multimachine power system using ETAP software. International Journal of Electrical and Electronics Engineering Studies. 2020, vol. 6, no. 1, рp. 1-12.
9. Emini Esmeraldo Transient Stability Studying of Power System with Synchronous Generators Equipped with AVR and GOV Using Neplan Software. International Research Journal of Engineering and Technology (IRJET). 2018, vol. 5, no. 2, pp. 1476-1483.
10. Gautam Nischal Binod, Poudel Nawaraj, KC Bibas, Sah Rakesh, NeupaneKrishna Raj, BasnetProjesh, ShahAjay, Pandey Bhagat Transient Stability Analysis of Power System Using ETAP. International Journal of Advanced Engineering. 2023, vol. 6, no. 1, pp. 20-35.
11. Baseer Mohammad Abdul Transient Stability Improvement of Multi-machine Power System using Fuzzy Controlled TCSC. IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE). Jan. 2014, vol. 9, no. 1, Pp. 28-40.
12. Benidris M., Mitra J., Singh C. Impacts of transient instability on power system reliability. International Conference on Probabilistic Methods Applied to Power Systems (PMAPS). IEEE, 2016, pp. 1-6. doi: 10.1109/PMAPS.2016.7764194
13. Abbasova E.M., Golodnov Yu.M., Zilberman V.A., Murzakov A.G. Sobstvennye nuzhdy teplovyh elektrostancij [In-plant needs of thermal power plants]. Moscow, Energoatomizdat Publ., 1991. 272 p. (In Russian)
14. Ilyushin P.V. Features of taking into account load parameters in the analysis of transient processes in networks with distributed generation facilities. Elektroenergiya. Peredacha i raspredelenie [Electric power. Transmission and distribution], 2018, no. 6 (51), pp. 54-61. (In Russian)
15. Mota Lia Toledo Moreira, Mota Alexandre Assis Load modeling at electric power distribution substations using dynamic load parameters estimation. Int. J. Elec. Power and Energy Syst. 2004, no. 26(10), pp. 805-811. doi: 10.1016/j.ijepes. 2004.07.002
16. Pazderin A.V.,Suvorov A.A., Tavlintsev A.S., Chusovitin P.V., Yudin A.V. Determination of the static characteristics of large load nodes. Nauchnoe obozrenie [Scientific Review], 2013, no. 7, pp. 70-77. (In Russian)
17. Dzyuba M.A., Tarasenko V.V., Korzhov A.V. Method for determining the static characteristics of the voltage load taking into account the restrictions on the operating parameters and electrical safety of the active experiment. Vestnik YUzhno-Uralskogo gosudarstvennogo universiteta. Seriya: Energetika [Bulletin of South Ural State University. Series "Power Engineering"], 2018, vol. 18, no. 2, pp. 28-35. (In Russian). doi: 10.14529/power180204
18. Lipskiy A.M., Aronovich I.M. Experimental determination of static characteristics of load nodes of electrical systems. Estestvennye i tekhnicheskie nauki [Natural and technical sciences], 2009, no. 3 (41), pp. 410-415. (In Russian)
19. Pankratov A.V., Zhuykov A.K., Shuvalova A.A., Polischuk V.I. Determination of static characteristics of voltage load based on passive experiment data taking into account network response. Elektrotekhnicheskie sistemy i kompleksy [Electrotechnical Systems and Complexes], 2021, no. 2 (51), pp. 4-11. (In Russian). doi: 10.18503/2311-8318-2021-2(51)-4-11
20. Nikolaev N.A., Bulanova O.V., Malafeev A.V., Kondrashova Yu.N., Tarasov V.M. Evaluation of the regulatory effect of rectifier load to determine the parameters of steady-state modes of power supply systems of industrial enterprises. Izvestiya vysshih uchebnyh zavedenij. Elektromekhanika [Bulletin of Higher Educational Institutions. Electromechanics], 2011, no. 4, pp. 115-118. (In Russian)
21. Nigamatullin R.M., Gazizova O.V., Malafeev A.V. Study of the influence of the regulatory effect of the load on the voltage level of the feeding substation taking into account the short-circuit power of the power system. Elektrotekhnicheskie sistemy i kompleksy [Electrotechnical Systems and Complexes], 2020, no. 2 (47), pp. 19-25. (In Russian). doi: 10.18503/2311-8318-2020-2(47)-19-25
22. Lyukhanov E.A. Sovershenstvovanie metodov opredeleniya staticheskih harakteristik nagruzki i ocenka ih vliyaniya na ekonomicheskie pokazateli elektrosetevyh kompanij. Kand. Diss. [Improvement of methods for determining the static characteristics of the load and assessment of their impact on the economic performance of electric grid companies. Kand. Diss.]. Yekaterinburg, 2024. 138 p. (In Russian)
23. Mikhailov V.I. Razrabotka metodiki polucheniya staticheskih harakteristik osnovnyh potrebitelej elektroenergii dlya optimizacii sistem elektro-snabzheniya prompredpriyatij. Kand. Diss. [Development of a methodology for obtaining static characteristics of the main consumers of electric power to optimize the power supply systems of industrial enterprises. Kand. Diss.]. Moscow, 1985. 19 p. (In Russian)
24. Kanafeev R.I., Zhirnov A.D., Klimova T.G. Optimal tuning of automatic excitation regulators of synchronous generators. Izvestiya vishikh uchebnikh zavedeniy. Problemy energetiki [Power engineering: research, equipment, technology], 2016, no. 11-12, pp. 77-83. (In Russian)
25. Ilyushin P.V., Perevalov K.V. On automatic excitation control systems for generating units of distributed generation facilities. Relejnaya zashchita i avtomatizaciya [Advancement of Relay Protection, Automation and Control in Electric Power Engineering], 2016, no. 4 (25), pp. 23-27. (In Russian)
Gazizova O.V., Varganova A.V., Patshin N.T., Melnikov M.S., Lazarev M.D. Calculation of Economically Feasible Voltage Level at an Industrial Power Plant. Elektrotekhnicheskie sistemy i kompleksy [Electrotechnical Systems and Complexes], 2025, no. 4(69), pp. 38-44. (In Russian). https://doi.org/10.18503/2311-8318-2025-4(69)-38-44