The most common violations of regulatory indicators of the quality of electric energy in electric networks

2021 ◽  
pp. 44-49
Author(s):  
A. G. Soshinov ◽  
T. H. Aisin
Keyword(s):  
Quality Indicators ◽  
Electric Energy ◽  
Electrical Equipment ◽  
Operating Conditions ◽  
Regulatory Requirements ◽  
Electric Networks ◽  
High Quality ◽  
The Asymmetry

Work on ensuring the quality of electric energy in accordance with the requirements of GOST 32144-2013 is currently relevant and requires prompt and high-quality solutions. The article lists the main consumers of electric energy that negatively affect its quality, provides the results of measurements of electric energy quality indicators and the most common violations of regulatory requirements, analyzes the influence of voltage asymmetry on the operating conditions of electrical equipment. The basic formulas for calculating the asymmetry coefficients and ways to reduce the voltage asymmetry are proposed.

scholarly journals Features of calculations of consequences of failures of power supply in distribution networks with the monoconsumer of electric energy

2020 ◽  
Vol 22 (2) ◽  
pp. 43-50
Author(s):  
Y. A. Sekretarev ◽  
D. A. Menyaikin
Keyword(s):  
Power Supply ◽  
Electric Energy ◽  
Distribution Networks ◽  
Operating Conditions ◽  
Electric Networks ◽  
Use Of Data ◽  
Information Classification ◽  
Specific Scheme ◽  
Transmission And Distribution

Reliability of power supply of consumers is an important task in the process of transmission and distribution of electric energy. The paper proposes a method for assessing the consequences of power failures of monoconsumers of electric energy on the example of an oil company and an adjacent power grid company. The uniqueness of the developed technique lies in the possibility of reliable calculation of reliability of power supply of complex branched electric networks without taking into account the specific scheme of power supply. The accuracy of calculations is increased due to the use of data directly studied power system, taking into account the specifics and operating conditions of specific equipment, instead of the average information. Classification of failures on the main reasons in electric networks of the oilproducing enterprise of the far North that allowed to develop actions for increase of level of reliability of power supply is made.

scholarly journals Treatment of industrial used water by UASB+CMBR process to produce industrial grade water for reuse

2018 ◽  
Vol 13 (2) ◽  
pp. 424-430 ◽  
Author(s):  
H. Noguchi ◽  
T. Niwa ◽  
Y. Nakamura ◽  
J. K. Agrawal ◽  
W. S. Ang ◽  
...  
Keyword(s):  
Ceramic Membrane ◽  
Operating Conditions ◽  
Anaerobic Sludge ◽  
Stable Operation ◽  
High Quality ◽  
Joint Project ◽  
Industrial Grade ◽  
One Year ◽  
Anaerobic Sludge Blanket

Abstract Joint project has been conducted in a demonstration plant with 1-MGD capacity at Jurong Water Reclamation Plant to produce high quality effluent through a combined process of up-flow anaerobic sludge blanket reactor and ceramic membrane bioreactor (UASB-CMBR). Water quality of the product and energy consumption met target which were evaluated after one-year operation. The joint project has further been conducted to optimize operating conditions including cleaning procedure. Recovery cleaning (RC) of the ceramic membrane was carried out after 18 months operation and permeability was recovered to be initial value. Stable filtration at 25 LMH was achieved after the RC. RO filtration test was also carried out to treat effluent from the UASB-CMBR. Stable operation in the RO system was achieved with flux of 15 LMH and recovery of 60%. Quality of RO permeates met criteria for industrial water. It is concluded that UASB-CMBR process with RO system can produce high quality water for reuse from industrial used water.

Use of the complex baking improver «Unipan Total» in the technology of bakery products

2021 ◽  
Vol 30 (6) ◽  
pp. 50-55
Author(s):  
S.V. Borisova ◽  
◽  
N.U. Mukhametchina ◽  
G.S. Sagdeeva ◽  
◽  
...  
Keyword(s):  
Quality Indicators ◽  
Weight Control ◽  
Wheat Bread ◽  
Bakery Products ◽  
High Quality ◽  
Quality Product ◽  
Conventional Methods ◽  
High Quality Product

The results of the study of the influence of various concentrations of the complex bakery improver «Unipan Total» on the properties of semi-finished products and quality indicators of bakery products are presented. Bakery products were produced using the unpaired method according to a unified recipe for Dniprovskaya buns. To obtain a high-quality product, prototypes were prepared from wheat bakery flour of the highest grade with the addition of the «Unipan Total» improver at a concentration of 0,5 to 8% to the flour weight, control ones without the improver. Organoleptic and physicochemical indicators of the quality of wheat bread samples were determined by conventional methods.

scholarly journals An Environmental Scan and Evaluation of Home Dialysis Quality Indicators Currently Used in Canada

2020 ◽  
Vol 7 ◽  
pp. 205435812097739
Author(s):  
Lisa Dubrofsky ◽  
Ali Ibrahim ◽  
Karthik Tennankore ◽  
Krishna Poinen ◽  
Sachin Shah ◽  
...  
Keyword(s):  
Quality Improvement ◽  
Quality Of Care ◽  
Peritoneal Dialysis ◽  
Quality Indicators ◽  
Patient Centered ◽  
High Quality ◽  
Home Dialysis ◽  
Environmental Scan ◽  
Starting Point

Background: Quality indicators are important tools to measure and ultimately improve the quality of care provided. Performance measurement may be particularly helpful to grow disciplines that are underutilized and cost-effective, such as home dialysis (peritoneal dialysis and home hemodialysis). Objective: To identify and catalog home dialysis quality indicators currently used in Canada, as well as to evaluate these indicators as a starting point for future collaboration and standardization of quality indicators across Canada. Design: An environmental scan of quality indicators from provincial organizations, quality organizations, and stakeholders. Setting: Sixteen-member pan-Canadian panel with expertise in both nephrology and quality improvement. Patients: Our environmental scan included indicators relevant to patients on home dialysis. Measurements: We classified existing indicators based on the Institute of Medicine (IOM) and Donabedian frameworks. Methods: To evaluate the indicators, a 6-person subcommittee conducted a modified version of the Delphi consensus technique based on the American College of Physicians/Agency for Healthcare Research and Quality criteria. We shared these consensus ratings with the entire 16-member panel for further examination. We rated items from 1 to 9 on 6 domains (1-3 does not meet criteria to 7-9 meets criteria) as well as a global final rating (1-3 unnecessary to 7-9 necessary) to distinguish high-quality from low-quality indicators. Results: Overall, we identified 40 quality indicators across 7 provinces, with 22 (55%) rated as “necessary” to distinguish high quality from poor quality care. Ten indicators were measured by more than 1 province, and 5 of these indicators were rated as necessary (home dialysis prevalence, home dialysis incidence, anemia target achievement, rates of peritonitis associated with peritoneal dialysis, and home dialysis attrition). None of these indicators captured the IOM domains of timely, patient-centered, or equitable care. Limitations: The environmental scan is a nonexhaustive list of quality indicators in Canada. The panel also lacked representation from patients, administrators, and allied health professionals. Conclusions: These results provide Canadian home dialysis programs with a starting point on how to measure quality of care along with the current gaps. This work is an initial and necessary step toward future collaboration and standardization of quality indicators across Canada, so that home dialysis programs can access a smaller number of highly rated balanced indicators to motivate and support patient-centered quality improvement initiatives.

scholarly journals On the power quality of electrical energy supplied to joint stock company “Aleksandrovsky mine”

2020 ◽  
Vol 209 ◽  
pp. 07012
Author(s):  
Oleg V. Zapanov ◽  
Lidiia I. Kovernikova
Keyword(s):  
Low Power ◽  
Power Quality ◽  
Energy Supply ◽  
Electric Energy ◽  
Electrical Energy ◽  
Electrical Equipment ◽  
Economic Damage ◽  
Joint Stock Company ◽  
Stock Company ◽  
Electric Networks

Joint Stock Company (JSC) “Mine Aleksandrovsky” is located in the Mogochinsky district of the Trans-Baikal Territory. “Mine Aleksandrovsky” concluded an energy supply agreement with JSC “Chitaenergosbyt” for the purchase of electric energy from it. In accordance with the contract, the electric energy supplier undertakes to supply electric energy that meets the requirements of the current legislation of the Russian Federation. The power quality in the Trans-Baikal Territory in most regions does not meet the requirements of State Standard 32144-2013. Suppliers and the network organization are responsible to consumers for the reliability of its electric energy supply and its quality within the boundaries of their electric networks. Despite the obligations of the contract, the electric energy supplied to “Mine Alexandrovsky” does not meet the requirements. In 2017 the ball mill engine in the shredding department of the gold recovery factory failed as a result of power outages and the supply of low power quality through the 6 kV line. The article provides information on interruptions in power supply over the years of operation of the enterprise, the results of analysis of the power quality, information on damage to electrical equipment caused by low power quality, and economic damage.

scholarly journals DETERMINATION OF OPTIMAL CHARACTERISTICS OF DEVICES FOR VOLTAGE UNBALANCE REDUCING IN LOW VOLTAGE ELECTRIC NETWORKS

2020 ◽  
Vol 2020 (6) ◽  
pp. 43-46
Author(s):  
A.F. Zharkin ◽  
◽  
S.O. Palachov ◽  
A.G. Pazieiev ◽  
D.O. Malakhatka ◽  
...  
Keyword(s):  
Simulation Modeling ◽  
Low Voltage ◽  
Electric Energy ◽  
Electrical Safety ◽  
Electric Networks ◽  
Voltage Unbalance ◽  
Zero Sequence ◽  
Unbalanced Loads

Ways of searching for optimal ways to improve the quality of electric energy in electric networks with dispersed unbalanced loads using zero-sequence current filters are considered, which take into account the possibility of ensuring the desired performance with minimal cost and taking into account the peculiarities of operation in emergency network conditions and ensuring electrical safety of consumers. Corresponding calculations were carried out using simulation modeling. References 6, figures 4.

scholarly journals Simulation based study on improving the transient response quality of turbocharged diesel engines

2017 ◽  
Vol 23 (3) ◽  
pp. 297-309 ◽  
Author(s):  
Rakesh Mishra ◽  
Syed Mohammad Saad
Keyword(s):  
Steady State ◽  
Diesel Engine ◽  
Quality Indicators ◽  
Transient Response ◽  
Operating Conditions ◽  
Compressor Wheel ◽  
Turbocharged Diesel Engine ◽  
Content Type ◽  
Wide Range

Purpose Use of fossil fuels in automotive sector is one of the primary causes of greenhouse emissions. The automotive engines need to perform at their best efficiency point to limit these emissions. Most of the quality indicators in this regard are based on near steady state global operational characteristics for engines without considering local performance. In the present study, extensive numerical simulations have been carried out covering a wide range of steady state and transient operating conditions to quantify interaction of turbocharger with engines through turbo lag phenomena which may cause increased emissions during the load change conditions. Furthermore possible innovations have been explored to minimize turbo lag phenomena. The paper aims to discuss these issues. Design/methodology/approach In this paper quality indicators have been developed to quantify the performance of turbocharged diesel engine under the transient event of rapid change in fueling rate which has been rarely investigated. The rate of fueling is changed from 40 mm3/injection to 52 mm3/injection at 1,000 rpm engine speed which corresponds to normal operating condition. To improve quality of transient response, torque assistance method and reduction of inertia of compressor wheel have been used. Parametric study has been undertaken to analyze the quality indicators such as outlet pressure of the compressor and the compressor speed. The turbo lag is quantified to obtain the close to optimal transient response of turbocharged diesel engine. Findings It has been shown that, with torque assist the transient response of the internal combustion engine is significantly improved. On the other hand, marginal improvement in transient response is observed by the reduction in inertia of the compressor wheel. Research limitations/implications The findings indicate that turbo lag can be minimized by providing torque assistance by active and passive means. Practical implications The developed methods can be used in practice for efficient operation of vehicles. Social implications The work carried out in the paper provides a way to minimize harmful emissions. Originality/value The quality indicators developed provide a quantitative measure of turbo lag phenomena and address the above mentioned problems.

Evaluation of Influence of Thermal Methods of Metal Separation Cutting on Welding Quality

2017 ◽  
Vol 265 ◽  
pp. 755-761 ◽  
Author(s):  
A.K. Tingaev ◽  
M.A. Ivanov ◽  
A.M. Ulanov
Keyword(s):  
Heat Affected Zone ◽  
Welded Joints ◽  
Heat Input ◽  
Experimental Studies ◽  
Welding Process ◽  
Regulatory Requirements ◽  
High Quality ◽  
Thermal Methods ◽  
Welding Seam

We have investigated a possibility of obtaining high-quality welded joints after oxygen and plasma cutting of steel С355 without removing the heat-affected zone (HAZ), in which the changes in chemical, phase and structural compositions are observed. Numerical and experimental studies of the effect of heat input of MAG and Submerged Arc welding on the quality of welded joints are performed. In particular, it was found that when the heat input of welding is at least 6.5 kJ/cm, the metal of HAZ of the edges after cutting is heated during the welding to temperatures above Ас3, which leads to its full recrystallization. When the heat input of welding is at least 10 kJ/cm, the edges after cutting are completely melted and become a part of the welding seam metal. The presence of extensive areas of melting and recrystallization of the edges in the welding process contributes to obtaining high-quality welded joints without removing the HAZ of the edges after cutting. To verify the results of numerical studies, experimental tests of control welded joints were conducted, which showed that the values of bending angle and impact toughness of the welding seam metal and heat affected zone are significantly above the regulatory requirements to quality of welded joints, and not less than the same requirements for steel С355. The obtained results confirm the possibility of revising domestic regulatory requirements for the steel constructions production in terms of the preparation of edges for welding using technologies of thermal cutting without subsequent machining.

Improvement of the Electric Energy Quality While Using a Super-Compensator

2013 ◽  
Vol 313-314 ◽  
pp. 858-864
Author(s):  
A. Rahmouni ◽  
B. Mazari ◽  
C. Benachaiba
Keyword(s):  
Control Method ◽  
Electric Energy ◽  
Electrical Energy ◽  
Active Filter ◽  
Operating Conditions ◽  
Load Current ◽  
Highly Efficient ◽  
Continuous Power

This paper is a contribution to improve the quality of the electrical energy, of which we study a new compensator that is a combination between a parallel active filter and an UPQC. The two FAP parts use a method of identification of the disruptive currents taking as a basis on calculates it of the reference currents from the components fundamental of the load current relative to the active and reactive continuous powers. that is based on the calculated reference currents from the fundamental components of the load current on the active and the reactive continuous power. That is metered to demonstrate the reliability and effectiveness of this compensator. We were compared it with the UPQC under the same operating conditions. The results of this work have shown that this new control method and highly efficient and super- compensator also gave satisfactory results compared to the UPQC in the case where the load is doubled.

EVALUATION OF THE QUALITY OF GROATS PRODUCED FROM RICE GRAINS OF DIFFERENT VARIETIES

2021 ◽  
Author(s):  
О.Н. ШЕЛУДЬКО ◽  
Н.К. СТРИЖОВ ◽  
В.О. ЛАГУТА
Keyword(s):  
Quality Indicators ◽  
Storage Conditions ◽  
Rice Grain ◽  
Regulatory Requirements ◽  
Rice Varieties ◽  
Rice Grains ◽  
Pest Infestation ◽  
Physico Chemical ◽  
Average Sample

Проведена оценка качественных показателей крупы, выработанной из зерна риса разных сортов и хранившейся в стандартных условиях, для определения ее класса. В качестве объектов исследования были 6 образцов крупы трех типов из зерна риса сортов Снежинка, Кураж, Регул, Лидер, Рапан и Сонет. Для получения объективных данных производили отбор средней пробы и определяли: органолептические показатели, влажность, содержание доброкачественного ядра, сорных примесей, испорченных и битых ядер, необрушенных зерен; пожелтевших, глютинозных и меловых ядер риса, ядер с красными полосками и красных, а также кислотность крупы и зараженность вредителями. Класс рисовой крупы определяли в соответствии с требованиями ГОСТ 6292–93. Установлено, что все исследованные образцы рисовой крупы по органолептическим и физико-химическим показателям соответствуют нормативным требованиям, что косвенно подтверждает отсутствие нарушений при ее хранении. Крупы из зерна риса сортов Снежинка, Лидер и Рапан по качественным показателям отнесены к рисовой крупе высшего класса и рекомендованы для детского питания. Рисовые крупы из сортов Кураж, Регул и Сонет по содержанию дробленого зерна и меловым ядрам превышали норму, установленную для рисовой крупы высшего класса, поэтому отнесены к первому классу. The evaluation of the quality indicators of groats produced from rice grains of different varieties and stored under standard conditions was carried out to determine its class. The objects of the study were 6 samples of three types of groats from rice grain varieties Snezhinka, Kurazh, Regul, Lider, Rapan and Sonet. The average sample was taken to obtain objective data and determined: organoleptic parameters, humidity, the content of a benign kernel, weed impurities, spoiled and broken kernels, unbroken rice grains; yellowed, glutinous and chalky rice kernels, kernels with red stripes and red, acidity of cereals, pest infestation. The class of rice cereals was determined in accordance with the requirements of GOST 6292–93. It was found that all the studied samples of rice groats according to organoleptic and physico-chemical parameters comply with regulatory requirements, which indirectly confirms the absence of violations of its storage conditions. Cereals made from rice grains of the Snezhinka, Lider and Rapan varieties are classified by quality indicators as high-class rice cereals and are recommended for baby food. Сereals made from rice varieties Kurazh, Regul and Sonet in terms of the content of crushed grain and chalk kernels exceeded the norm established for rice cereals of the highest class, therefore they are classified as the first class.

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