The development of AC distribution systems provides for the seamless integration low-voltage microgrids with distributed energy resources (DERs). This poses new challenges control normal, emergency, and post-emergency states microgrids, calling creation information communications technology infrastructure. Power converters/inverters that are used to integrate renewable DERs lack inertia. Along them, fossil fuel-fired generation units also being integrated into microgrids. These include gas...

The creation of a decentralized low-carbon energy infrastructure is the main trend in development electric power industry many countries. Distributed generation facilities (DGs) based on gas reciprocating units (GRUs) are often built by industrial entities for efficient utilization secondary resources order to minimize environmental impact. Modern GRUs have some advantages, but they design features that should be factored when connecting them internal systems entities. Incorrect...

Integrated multi-energy systems give good possibilities to have high effectiveness of energy supply consumers. The concept hub is developed for modeling and simulation integrated multi-carrier systems. Based on previous investigations, in this paper the authors develop model hub. Basic principles designing are discussed. Realization using Matlab/Simulink suggested. Simulation results electricity heat demand explained as demonstration model.

Distributed generation facilities are normally connected to distribution electrical networks or internal of entities where automatic transfer switches (ATS) widely used. Commissioning generating capacities changes significantly the topology and operation, in which case distributed facility can create conditions when switch does not operate, its response time increases, a voltage avalanche occurs at load node ATS operation is unacceptable. The characteristic areas post-emergency identified...

The most modern technical systems are an integration of various energy converters and sources physical nature. Mechanical, thermal, electromagnetic, as well computer (information) monitoring control system. Multi-energy (MES) also belong to the class such devices. main task in creating mathematical models is a methodological approach that allows joint modelling 6 objects nature on single basis. article considers approaches description MES, assumptions stages formation for this systems....

Modern gas-turbine units (GTUs) and gas-reciprocating (GRUs) have found a wide use at power plants, including distributed generation facilities, running on gaseous fuel. The design features of these generating considerable effect the nature parameters transient processes due to emergency disturbances in adjacent network. study shows that single-shaft do not allow even short-term frequency drops. These schemes operating conditions arise active shortages when connection between plant system...

Gas-fired reciprocating engine plants (GREPs) are widely used in power supply systems of industrial facilities, which allows for ensuring the operation electrical loads case accidents system. Operating experience attests to fact that during islanded operations, GREPs shut down by process protections or protective relays event severe disturbances. This leads complete load shedding, is accompanied losses and damage facilities. Severe disturbances include following ones: large surges on due one...

With the large-scale integration of distributed energy resources (DER) into passive distribution networks with voltages up to 1 kV, these are being converted microgrids. When topology and operating conditions change, several challenging issues arise related functioning protection devices (PD) that in operation. Most DERs, including renewable generators, integrated microgrids by means inverters. In event short circuits (SC) microgrids, DERs provide a fault current contribution no more than...

The modeling of battery energy storage systems (BESS) remains poorly researched, especially in the case taking into account power loss due to degradation that occurs during operation system with a large penetration generation from renewables and stochastic load electric vehicles (EV). Meanwhile, lifetime varies considerably manufacturer’s claim different operating conditions, also depends on level renewable sources (RES) penetration, cyclic operation, temperature, discharge/charge rate,...

Decarbonization and decentralization are major trends in the transformation of conventional power systems. The increase penetration renewable electricity generation into mix contributes to reduction greenhouse gas emissions. At same time, one has ensure that reliability operational flexibility as measured by respective metrics meet specified standards. This calls for a solution set engineering, economic, institutional problems, list which depends on features specific countries regions...

In modern converter-dominated power systems, total inertia is very variable and depends on the share of generated by renewable-based converter-interfaced generation (CIG) at each specific moment. As a result, limits required grid codes rate change frequency its nadir or zenith during disturbances become challenging to achieve with conventional control approaches. Therefore, transition novel strategy CIG grid-forming converter relevant. For this purpose, algorithm based virtual synchronous...

Power consumption management is crucial to maintaining the reliable operation of power grids, especially in context decarbonization electric industry. Managing industrial enterprises by personnel proved ineffective, which required development and implementation automatic energy systems. Optimization behavior requires comprehensive information on parameters technological processes an enterprise. The paper explores specific features non-stationary conditions output production assesses...

THE PURPOSE. Development of digital models for calculating induced voltages on a pipeline created by six-phase power transmission line in normal and emergency operating modes. METHODS. The studies were conducted computer model an electrical network that includes this type. Its formation involved approach based the use phase coordinates. modeling was carried out using Fazonord software package, version 5.3.5.3-2024. RESULTS. following modes 220 kV multiphase considered: symmetrical open-phase...

Modern electric power systems (EPSs) experience an increase in the number of distributed generation plants. These plants can be located far from center consumption, which "narrows" areas static aperiodic stability, determining possibility existence operating mode system. Since there variations conditions and changes it is necessary to use adaptive control algorithms. The presented methods are based on equations limit conditions. Reliable convergence iterative processes ensured by specifying...

Every year, electric power systems (EPSs) experience accidents resulting in static and dynamic instability, as well supply disruptions. Accidents evolve along various trajectories sometimes can exhibit a cascading effect. In this case, the sequential tripping of generating and/or network equipment occurs due to overloads or voltage drops at nodes network. This leads significant losses for industrial commercial consumers, while also escalating social tensions within population. study aims...

The energy transition is accompanied by developing a digital decentralized low-carbon infrastructure with renewable-based generating plants as its main elements. In 2020, 15 photovoltaic power (PVPs) an installed capacity of 364 MW were commissioned in Russia, which 21.08% the total PVP Russia. findings analysis Russia’s current regulatory and technical documents (RTD) concerning frequency active flow control are presented. They indicate that all PVPs must participate general primary (GPFC)....

At present, the entire world is moving towards digitalization, including in electric power industry. Digitalization its heyday and a lot of articles reports are devoted to this topic. same time, least digitalized electrical networks distribution that account for very large share systems. The article proposes methodology creating flexible network based on use digital technology. Additionally, we elaborate with identification collection necessary information create networks, develop ways adapt...

The process of establishing relay protection and automation (RPA) settings for electric power systems (EPSs) entails complex calculations operating modes. Traditionally, these are based on symmetrical components, which require the building equivalent circuits various sequences. This approach can lead to errors both when identifying modes modeling RPA devices. Proper measuring transformers (MTs), component filters (SCFs), connected them effectively solves this problem, enabling configuration...

Treatment of HIV-related progressive multifocal leukoencephalopathy (PML) with courses immunosuppressive cytarabine alternating antiretroviral therapy has led to the rapid clinical improvement and a total regression brain lesions (Lidman C et al., AIDS, 1991) on magnetic resonance imaging. In contrast, treatment concomitant in trial (Hall CD N Engl J Med, 1998) for patients HIV-associated PML failed. These data support potential transient immunosuppression during short non-structured...