This paper presents a control philosophy for multiterminal DC grids, which are embedded in the main AC grid. transmission lines maintain higher power flow at longer distances compared with lines. The voltage losses also much lower. is good option Russian north. Arctic seashore regions of Russia don't have well developed electrical infrastructure therefore line lengths significant there. Considering above it possible to use grids supply mining enterprises (offshore drilling platforms...

The power supply system is affected by external disturbances, so it should be stable and operate normally in compliance with quality standards. goes into abnormal modes operation when, after a short-term failure or disturbance, does not restore normal mode. electrical complex, which includes wind plant, as well battery diesel generator connected parallel, able to provide reliable consumers meets the indicators. article develops an algorithm that implemented automatic control select operating...

The article provides an analysis of the existing methods identifying consumer’s contribution to voltage distortion at a point common coupling. considered do not allow correctly and fairly determining source harmonic distortions, or they have limited application difficulties in implementation. paper proposes new for high harmonics. developed techniques are based on grid operation modes with two connected consumers using compensating devices, such as reactive power compensation devices passive...

The article discusses the issues of identifying location non-linear loads in electrical networks which makes main contribution to distortion non-sinusoidal voltage and current distribution network an industrial enterprise, including mining enterprises. existing methods for determining source higher harmonic components are considered, their advantages disadvantages revealed. used include low accuracy incorrectness use When developing a new method, authors were faced with task simplicity its...

This paper discusses the issues of assessing influence external distortion sources on functioning a shunt passive harmonic filter. In this study, we evaluated overload filter based determining contributions sources. A method was proposed for sources, which allowed us, regardless background distortions, to determine consumer loads, as well contribution distortions. The simulation carried out using Simulink MatLab software (version R2023a). Several scenarios were considered in following values...

This work is devoted to the analysis of scientific articles in field hybrid energy complexes based on hydrogen technologies and renewable sources. A special attention given wind generation. The review topics publications indexed Scopus database research carried out, most frequently encountered rarest ones are highlighted. Brief statistics about selected for detailed given. interesting direction studying development control systems complexes. Several traditional approaches, which commonly...

Moving towards low-carbon electricity systems through the massive deployment of renewable energy sources (RES) presents a unique opportunity to combat climate change, but it also poses enormous technical challenges, especially from frequency viewpoint. To ensure secure RES integration in terms stability, system operators worldwide have adopted new grid codes requiring provide fast response (FFR). However, if not properly justified, stringent requirements may pose an unnecessary barrier...

The paper considers the influence of harmonics on operating electrical energy meters in a network with nonlinear loads. It is shown that electronic static active are tested presence distortions, and reactive accuracy requirements do not take into account possible harmonics. revealed maximum error metering exerted by number taken their amplitude, additionally influenced phase angle at fundamental harmonic frequencies, which has been confirmed laboratory conditions. Additionally, experimental...

Cuba is traditionally considered a country with an underdeveloped industry. The share of the mining and metallurgical industries in gross industrial production republic small – about 3 % GDP. development deposits extraction nickel ores important sector economy Republic Cuba, since largest reserves cobalt on North American continent are located territory country. energy system can serve as growth factor this economy. Due to climatic features impossibility integrating new capacities into...

The paper deals with issues of modeling nonlinear electrical loads various types, such an uncontrolled rectifier, thyristor power regulator and mixed equivalent load. For these load existing analytical expressions were identified to determine the magnitudes harmonic currents, waveforms currents obtained during measurements in laboratory conditions variable parameters grid impedance results compared, it was found that error determining can reach 60% for individual 54% A more accurate method...

This paper provides an in-depth analysis of the challenges associated with commonly used optimization methods for determining configuration hybrid renewable energy systems that rely on solar generation and hydrogen technologies. It highlights key research directions in this field includes a brief overview number publications related to subject. The standard topology employed implementation these studied complexes is clearly defined described. also presents comprehensive examination various...

The problem of increasing the efficiency existing power plants is relevant for many countries. Solar built at end 20th century require, as their shelf lives have now expired, not only replacement solar modules, but also modernization component composition. This due to requirements improve ensure expansion renewable energy technologies. article presents a technical and economic analysis choice plant method, which consists (1) method calculating amount generation; (2) modeling under specific...

This study examines different methodologies for representing an asynchronous motor at higher harmonics by utilizing its equivalent circuit. Several approaches were compared based on simulation modeling. An experimental investigation was conducted in a laboratory setting using electric motors with power ratings of 1.5 kW and 5.5 kW. The purpose this to examine the characteristics impedance presence high-harmonic conditions. generation achieved through utilization precisely regulated thyristor...

Nowadays, virtually everywhere worldwide, the electricity is paid for based on active and reactive power meters. Higher harmonics appeared to influence electric meter readings, this specifically relates power. Incorrect readings occur due different so-called "measuring" protection levels in device circuitry various devices. The paper analyzes of devices from manufacturers. Based analysis, authors introduce a new approach evaluating costs connection generation, transmission consumption, with...

The development of the Arctic territories Russia requires reliable sources electricity, and region needs new solutions technologies. It is necessary to plan not only modernization expansion existing power grid facilities increase efficiency energy complexes, but also use distributed generation. deviation real loads from indicators summer modal day used in calculations balances may be 40-50%. develop algorithms that will allow predicting operating modes wind-diesel complexes cover peaks...

In this article, a method that allows sharing responsibilities for the generation of harmonic currents between utility and consumers powered by one point common coupling (PCC) is addressed. For these purposes, mathematical modeling power supply system (PSS) with two carried out in order to introduce new indices using simplest PSS structure as an example. Two are introduced quantify consumers’ contribution distortion current voltage at PCC evaluate emission from side. Experimental tests where...

The paper is about voltage oriented control (VOC) of an active rectifier during short periods dips. Most dips are caused by circuits in one line or between two lines. This leads to the three phase voltages unbalance. While power grid unbalanced, vector rotating, but its hodograph generalized not a circle. system orienting current direction vector. Because specifity system, these conditions lead harmonic distortion rectifier's currents. In article, mechanism forming currents circumstantially...

This paper represents control strategy of anisotropic permanent magnet synchronous motor (IPMSM) in the field-weakening region. Field weakening controller allows to increase maximum achievable speed with output torque reduction. Proposed system consists four general modes: MTPA (maximum per ampere), MC current), FW (field weakening), and MTPV voltage) which must be chosen accordingly speed, current references. Operation point is found as an intersection hyperbola voltage ellipse curves d-q...

The problem of the stability a frequency-controlled drive in conditions voltage failures is topical, since modern production sensitive to process disturbances. Of particular interest are issues preserving parameters and mechanism without use additional drives converters. However, these methods passing through sags require accurate rapid determination DC link for power grid deviations. article presents method that allows, less than half period supply voltage, determine both shape bus value...

The low voltage power grids usually include neutral wire for load balancing. If currents spectra contain third harmonics then the current can rise to extremely high values. Normal magnitude could be exceeded almost twice. Such kind of overload may lead reduction cable lifetime due insulation aging. paper goal is obtain a criterion choosing compensating devices that based on analysis reason and features this mode. three-phase four-wire electrical network model with unbalanced sources...

Operation of the speed variable electrical drive than includes active rectifier with voltage oriented control system during failures is discussed in paper. It established that an asymmetric failure, VOC controlled a high harmonics source. To form sinusoidal currents novel strategy proposed. References input values are being calculated from parameters generalized vector's locus and instantaneous power engine. The proposed implemented into computer model developed Simulink MATLAB environment....

This paper proposes a control strategy of open winding permanent magnet synchronous motor (OW PMSM) in field weakening and braking modes. There are two inverters connected to the start end windings with traction batteries which have equal voltage levels. Paper describes algorithms, provides simulation proposed topology Matlab/Simulink software. Simulations trainset processes different regimes (accelerating braking). Simulation results shows overall performance.