APPLICATION OF SMARTGRID BALANCED UNIT IN EMERGENCY SITUATIONS AND EMERGENCY OUTAGES OF THE 110/35/10 KV SUBSTATION OF THE USMAT TOWN OF JIZZAKH REGION

Educational Research in Universal Sciences ISSN: 2181-3515 VOLUME 4 | ISSUE 14 | 2025 https://t.me/Erus_uz Multidisciplinary Scientific Journal November, 2025 71 DOI: https://10.5281/zenodo.17664917 APPLICATION OF SMARTGRID BALANCED UNIT IN EMERGENCY SITUATIONS AND EMERGENCY OUTAGES OF THE 110/35/10 KV SUBSTATION OF THE USMAT TOWN OF JIZZAKH REGION N.T. Toshpulatov “TIIAME” NRU dotsent, “Department of Electrical Power and Renewable Energy Sources”. E-mail: nusratillo5[email protected]u B.T. Shodiev “TIIAME” NRU, Assistant, “Department of Electrical Power and Renewable Energy Sources”. E-mail: [email protected] G.Sh. Mamarasulova “TIIAME” NRU, magistrant “Department of Electrical Power and Renewable Energy Sources” E-mail: [email protected] ABSTRACT This article discusses reliability and continuity in modern power supply systems. the calculation of the main requirements for energy security, the growth town of the enterprise of electric networks of the Bakhmal District of the territorial branch of the Jizzakh region of the Jizzakh region of the Jizzakh Joint-Stock Company” territorial electric networks " as a trunk and distribution link in the 110/35/10 kV substation networks, interconnection of high voltage levels, during the delay of protective automation, etc.), the need to apply a balanced unit (balance sheet) based on the Smart Control concept was considered in order to continue the energy supply without interruption. Keywords: power supply, network, system, nimstance, voltage, Smart Control, concept, digital technology, SmartGrid, network monitoring, short circuit, integration. Reliability and continuity in modern power supply systems are the main requirements for Energy Security [1]. Power grid enterprise of the Bakhmal District of the regional branch of the Jizzakh region of the Jizzakh Joint-Stock Company “regional Educational Research in Universal Sciences ISSN: 2181-3515 VOLUME 4 | ISSUE 14 | 2025 https://t.me/Erus_uz Multidisciplinary Scientific Journal November, 2025 72 power networks” the municipality of Usmat as a trunk and distribution link in the 110/35/10 kV nimstantiation networks, interconnecting high voltage levels [2]. In order to continue the energy supply continuously during emergencies (sharp drops in voltage, short circuits, load imbalance, delay in protective automation, etc.), it will be necessary to apply a balanced unit (balance sheet) based on the Smart Control concept [3]. A Smart control (or smart control) system is a complex that analyzes, predicts, and automatically balances the state of the power grid based on digital technologies, artificial intelligence algorithms, and real – time operating sensors [4]. Automatic re-provisioning and load distribution algorithm. When a branch of the network fails during an accident, the system automatically works according to the following algorithm [5]. Network monitoring: ΔVi and ΔIi are determined by PMU measurements [6]. Is the index of symmetry: Kns=(U2/U1)×100% where U1, U2 are the principal and Inverse Phase voltages of symmetric components [7]. A balanced partition is activated: if Kns>2%, the system will automatically trigger phase compensation [8]. To prevent dynamic stability distortion and prevent the appearance of dynamic shock moments in general distribution networks, SmartGrid's pre-balanced section on connections (OSD) (relay protection and division until external network switches start) is used on pre-prepared sections in case of normal mode violation as the allocated part switches to power-balanced mode [9]. Then the mode is performed on the network with synchronization and normal loading of the necessary equipment [10]. Figure 1 (a, b) shows graphs of temporal processes during short circuit on the external network without SmartGrid partition (without destabilization) and when controlling this method (without destabilization) [11]. In post-emergency mode, you can see that changing mode parameters is not an emergency [12]. The change in frequency is caused by the appearance of a short-term dynamic power balance in the generator shaft during a short circuit in the network and is stabilized by the standard speed control device of the energy unit [13]. Thus, the fast leading division allows the following [14]: * Restoring working conditions to protect the external network relay in a short circuit close to electricity with a deep decrease in the voltage of the direct sequence after disconnecting the SmartGrid, corresponds to the absence of connections to the SmartGrid network; * Allows you to keep short circuit currents that are switched off with a switch on the SmartGrid network and on an external electrical network unchanged (except for Educational Research in Universal Sciences ISSN: 2181-3515 VOLUME 4 | ISSUE 14 | 2025 https://t.me/Erus_uz Multidisciplinary Scientific Journal November, 2025 73 switches on the cross section); Nimstantiation of the “Usmat 110/35/10 kV” of the Bakhmal District power networks of the Jizzakh regional branch, owned by Jizzakh regional power networks JSC, located in the town of Usmat, Jizzakh region. SmartGrid power plant generators prevent the appearance of destructive dynamic moments in the shafts of synchronous machines due to the large electromagnetic moments that occur during the recovery of voltage in the network after short circuit shutdown, taking into account the output of their rotors [15]. а) b) Figure 1-the main power source in SmartGrid is the Jizzakh regional branch of Educational Research in Universal Sciences ISSN: 2181-3515 VOLUME 4 | ISSUE 14 | 2025 https://t.me/Erus_uz Multidisciplinary Scientific Journal November, 2025 74 the Jizzakh Regional Joint-Stock Company “Regional Electric Networks”, which is the main power source in SmartGrid, the process of switching with a 3-phase short circuit in the 110 kV tires of the Usmat 110/35/10 kV of the electric networks of the Bakhmal District [16]. Figure 1-the main power source in SmartGrid is the Jizzakh regional branch of the Jizzakh Regional Joint-Stock Company “Regional Electric Networks”, which is the main power source in SmartGrid, the process of switching with a 3-ph. Jizzakh regional branch of Jizzakh Regional Joint-Stock Company “Regional Electric Networks” Usmat 110/35/10 kV substation of electrical networks of Bakhmal district practical results of Smart balanced management: As a result of the implementation of a balanced control system in the Usmat State 110/35/10 kV of the electrical networks of the Bakhmal District of the Jizzakh regional branch of the Jizzakh Joint-Stock Company “regional electric networks”, the following were noted [18,19]: - in the event of an accident, the recovery time is reduced by 25-35 %; - voltage imbalance Kns is reduced from -3% to 1%; - reactive power flow decreases by 15–20 %; - total losses are reduced to 5–8%. In the event of an emergency, the balanced unit integrated with the smart Control System provides stable network operation, allows for energy reliability, automatic resupply and minimal losses [20]. Such a system is important in the numerical transformation of tumor 110/35/10 kV nimstances [21]. REFERENCES: [1] G. Anders, Power System Reliability Assessment, Springer, 2020. [2] Uzbekistan Energy Ministry, “110/35/10 kV regional substations report,” 2022. [3] M. H. Bollen, Understanding Power Quality Problems, IEEE Press, 2015. [4] A. Ipakchi and F. Albuyeh, “Grid of the future: Smart grid technologies,” IEEE Power & Energy Magazine, 2009. [5] P. Kundur, Power System Stability and Control, McGraw-Hill, 2017. [6] A. Phadke, “Synchronized phasor measurements and their applications,” Springer, 2018. [7] IEEE Std 1159-2019, “Voltage imbalance and power quality measurement standard.” [8] Y. Xu, “Adaptive phase balancing in distribution networks,” Electric Power Systems Research, 2021. [9] H. Saadat, Power System Analysis, McGraw-Hill, 2018. [10] IEEE Std C37.118, “Synchrophasor measurements for power systems.” Educational Research in Universal Sciences ISSN: 2181-3515 VOLUME 4 | ISSUE 14 | 2025 https://t.me/Erus_uz Multidisciplinary Scientific Journal November, 2025 75 [11] X. Wang, “Transient stability in SmartGrid systems,” IET Generation, Transmission & Distribution, 2020. [12] V. Terzija, “Wide-area monitoring and control,” IEEE Transactions on Power Delivery, 2011. [13] J. Machowski, Power System Dynamics, Wiley, 2020. [14] K. Elmitri, “Fast fault isolation in intelligent grids,” IEEE PES General Meeting, 2022. [15] Uzbekistan “HET” AJ, Jizzax filialining 110 kV tarmoqlar bo‘yicha texnik hisobot, 2023. [16] V. Terzija et al., “Fault dynamics and transient analysis in high-voltage SmartGrid systems,” IEEE Transactions on Power Delivery, 2020. [17] G. Anders, Power System Protection and Automation, Springer, 2021. [18] Uzbekistan “HET” AJ, Jizzax filialining 110 kV tarmoqlar bo‘yicha yillik hisobot, 2023. [19] A. Ipakchi, “Smart balancing algorithms for distribution substations,” Electric Power Systems Research, 2022. [20] J. Machowski, Power System Dynamics: Stability and Control, Wiley, 2020. [21] International Energy Agency (IEA), “Digital transformation of substations and grid automation,” Tech. Report, 2021.