scholarly journals Research on UHV Isolating Switch Technology with Multi-source Action Signal

2021 ◽  
Vol 2137 (1) ◽  
pp. 012036
Author(s):  
Xingxing Wang ◽  
Yujie Zhang ◽  
Hongjun Ni ◽  
Shuaishuai Lv ◽  
Yu Zhu ◽  
...  
Keyword(s):  
Smart Grids ◽  
Power Transmission ◽  
Smart Devices ◽  
Manual Labor ◽  
Development Trends ◽  
Voltage Level ◽  
Advantages And Disadvantages ◽  
At Home

Abstract With the improvement of the voltage level of power transmission and transformation lines, the development of smart grids has highlighted a major demand, and relevant enterprises and scientific researchers in the UHV field at home and abroad have explored the research of water intelligent isolation switch equipment. This article explains the current problems of traditional substation isolation switches, and analyzes the advantages and disadvantages of UHV isolation switch technology and its application status through three aspects: isolation switch, isolation switch contact and isolation switch sensor. Studies have shown that the development and application of isolating switches with multi-source action signals, and further improving the proportion and accuracy of smart devices to replace manual labor are the development trends of UHV isolating switches.

scholarly journals Enhanced ID-Based Authentication Scheme Using OTP in Smart Grid AMI Environment

2014 ◽  
Vol 2014 ◽  
pp. 1-8
Author(s):  
Sang-Soo Yeo ◽  
Dae-il Park ◽  
Young-Ae Jung
Keyword(s):  
Smart Grid ◽  
Good Choice ◽  
Authentication Scheme ◽  
Security Requirements ◽  
Smart Devices ◽  
Smart Meter ◽  
Forward Secrecy ◽  
Hardware Specification ◽  
At Home

This paper presents the vulnerabilities analyses of KL scheme which is an ID-based authentication scheme for AMI network attached SCADA in smart grid and proposes a security-enhanced authentication scheme which satisfies forward secrecy as well as security requirements introduced in KL scheme and also other existing schemes. The proposed scheme uses MDMS which is the supervising system located in an electrical company as a time-synchronizing server in order to synchronize smart devices at home and conducts authentication between smart meter and smart devices using a new secret value generated by an OTP generator every session. The proposed scheme has forward secrecy, so it increases overall security, but its communication and computation overhead reduce its performance slightly, comparing the existing schemes. Nonetheless, hardware specification and communication bandwidth of smart devices will have better conditions continuously, so the proposed scheme would be a good choice for secure AMI environment.

scholarly journals NAČRTOVAN POROD NA DOMU: PREGLEDNI ČLANEK

2016 ◽  
Vol 85 (3) ◽  
Author(s):  
Tamara Serdinšek ◽  
Iztok Takač
Keyword(s):  
United Kingdom ◽  
The Netherlands ◽  
Home Birth ◽  
The United States ◽  
Home Births ◽  
Mortality And Morbidity ◽  
Advantages And Disadvantages ◽  
Birth Attendants ◽  
Definition Of ◽  
At Home

Background: Home birth is as old as humanity, but still most middle- and high-income countries consider hospitals as the safest birth settings, as complications regarding birth are highly unpredictable. Despite this there are a few countries in which home birth in integrated into official healthcare system (the Netherlands, United Kingdom, Canada etc.). Home births can be divided into unplanned and planned, and the latter can be further categorized by the presence of the birth attendants. This review focuses on planned home births, which are differently represented throughout the world. In the United States 0.6-1.0% of all children are born at home, in the United Kingdom 2-3%, in Canada 1.6% and in the Netherlands 20-30%. For Slovenia, the number of planned home births is unknown; however, in 2010 0.1% of children were born outside medical facilities.Conclusions: The safety of home birth in still under the debate. While research confirms smaller number of obstetric interventions and some complications in mothers who give birth at home, the data regarding the neonatal and perinatal mortality and morbidity is still conflicting. This confirms the need for large multicentric trials in this field. Current home birth guidelines emphasize that women should be well informed regarding the possible advantages and disadvantages of home births. In addition, the emphasis is on definition of selection criteria for home birth, indications for intrapartal transfer to the hospital and appropriate education of birth attendants. 

scholarly journals A multi-level optimization technique for electricity consumption management and pricing in residential neighborhoods

2021 ◽  
Author(s):  
Ramyar Rashed Mohassel
Keyword(s):  
Smart Grids ◽  
New Technologies ◽  
Power Transmission ◽  
Optimization Technique ◽  
Electricity Consumption ◽  
Optimization Method ◽  
Residential Neighborhood ◽  
Upper Level ◽  
Advanced Metering ◽  
Power Management Unit

With the introduction of new technologies, concepts and approaches in power transmission, distribution and utilization such as Smart Grids (SG), Advanced Metering Infrastructures (AMI), Distributed Energy Resources (DER) and Demand Side Management (DSM), new capabilities have emerged that enable efficient use and management of power consumption. These capabilities are applicable at micro level in households and building complexes as well as at macro level for utility providers in form of resource and revenue management initiatives. On the other hand, integration of Information Technology (IT) and instrumentation has brought Building Management Systems (BMS) to our homes and has made it possible for the ordinary users to take advantage of more complex and sophisticated energy and cost management features as an integral part of their BMS. The idea of combining capabilities and advantages offered by SG, AMI, DER, DSM and BMS is the backbone of this thesis and has resulted in developing a unique, two-level optimization method for effective deployment of DSM at households and residential neighborhoods. The work consists of an optimization algorithm for households to maximize utilization of DER as the lower level of the envisioned two-level optimization technique while using a customized Game Theoretic optimization for optimizing revenue of utility providers for residential neighborhood as the upper level. This work will also introduce a power management unit, called Load Moderation Center (LMC), to host the developed optimization algorithms as an integrated part of BMS. LMC, upon successful completion, will be able to automatically plan consumption, effectively utilize available sources including grid, renewable energies and storages, and eliminate the need for residences to manually program their BMS for different market scenarios.

Relay protection and automation of electric power systems

2021 ◽  
Author(s):  
Sergey Goremykin
Keyword(s):  
Power Systems ◽  
Electric Power ◽  
Transmission Lines ◽  
Power Supply ◽  
Power Transmission ◽  
Relay Protection ◽  
Electrical Equipment ◽  
Electric Power Systems ◽  
Federal State ◽  
Advantages And Disadvantages

The textbook describes the main issues of the theory of relay protection and automation of electric power systems. The structure and functional purpose of protection devices and automation of power transmission lines of various configurations, synchronous generators, power transformers, electric motors and individual electrical installations are considered. For each of the types of protection of the above objects, the structure, the principle of operation, the order of selection of settings are given, the advantages and disadvantages are evaluated, indicating the scope of application. The manual includes material on complete devices based on semiconductor and microprocessor element bases. The progressive use of such devices (protection of the third and fourth generations) is appropriate and effective due to their significant advantages. Meets the requirements of the federal state educational standards of higher education of the latest generation. It is intended for students in the areas of training 13.03.02 "Electric power and electrical engineering" (profile "Power supply", discipline "Relay protection and automation of electric power systems") and 35.03.06 "Agroengineering" (profile "Power supply and electrical equipment of agricultural enterprises", discipline "Relay protection of electrical equipment of agricultural objects"), as well as for graduate students and specialists engaged in the field of electrification and automation of industrial and agrotechnical objects.

RTDS-Based Simulate Analysis of AC Filters Switch Method in HVDC Converter for Voltage Stability

2013 ◽  
Vol 756-759 ◽  
pp. 4250-4253
Author(s):  
Xiao Jun Zhu ◽  
Tao Chen ◽  
Wei Fang ◽  
Luo Jiang Qian ◽  
Yi Yu Wen
Keyword(s):  
Voltage Stability ◽  
Power Transmission ◽  
Voltage Control ◽  
Salient Feature ◽  
Fast Response ◽  
Control Mode ◽  
Reactive Control ◽  
Voltage Level ◽  
Action Sequence ◽  
Voltage Control Mode

In most of the AC-DC hybrid power transmission system AC filters is widely applied to stabilize voltage level in addition to filter harmonic. However, the voltage stability of AC bus is greatly influenced by action sequence of switching AC filters in group. The paper presents the concept of reactive characteristics of the convertor and AC filters, using reactive and voltage control mode to switch them. The modeling, control, and principle of operation for the AC-side switching filters are described. The voltage level is controlled via regulating action of switching filters by step. The salient feature of the proposed control modes is that voltage control contributes to keep the voltage level, and reactive control has no fast response on guaranteeing voltage stability, but two methods can apply to different occasions based on the requirements of voltage stability. All analysis and control system designs are verified through building a RTDS model in a typical ±500kV power system.

The Research on Soil-Structural Dynamic Interaction

2011 ◽  
Vol 90-93 ◽  
pp. 2292-2296
Author(s):  
Xiao Li Dong ◽  
Jun Hong Hao ◽  
Yan Zhen Wang ◽  
Rui Hua Wang
Keyword(s):  
Soil Structure ◽  
Dynamic Interaction ◽  
Structural Dynamic ◽  
Advantages And Disadvantages ◽  
Structure Dynamic ◽  
At Home

This paper will introduce the basic methods of soil-structure dynamic interaction at home and abroad, and analysis the advantages and disadvantages of these methods. Finally, the paper will put forward opinions on the research tendency of soil-structure dynamic interaction.

scholarly journals Hospital at Home care for older patients with cognitive impairment: a protocol for a randomised controlled feasibility trial

BMJ Open ◽  
2018 ◽  
Vol 8 (3) ◽  
pp. e020332 ◽  
Author(s):  
Maaike A Pouw ◽  
Agneta H Calf ◽  
Barbara C van Munster ◽  
Jan C ter Maaten ◽  
Nynke Smidt ◽  
...  
Keyword(s):  
Cognitive Impairment ◽  
Home Care ◽  
Older Patients ◽  
Hospital Care ◽  
Feasibility Trial ◽  
Nursing Home Admission ◽  
Advantages And Disadvantages ◽  
Hospital At Home ◽  
Randomised Controlled ◽  
At Home

IntroductionAn acute hospital admission is a stressful life event for older people, particularly for those with cognitive impairment. The hospitalisation is often complicated by hospital-associated geriatric syndromes, including delirium and functional loss, leading to functional decline and nursing home admission. Hospital at Home care aims to avoid hospitalisation-associated adverse outcomes in older patients with cognitive impairment by providing hospital care in the patient’s own environment.Methods and analysisThis randomised, non-blinded feasibility trial aims to assess the feasibility of conducting a randomised controlled trial in terms of the recruitment, use and acceptability of Hospital at Home care for older patients with cognitive impairment. The quality of care will be evaluated and the advantages and disadvantages of the Hospital at Home care programme compared with usual hospital care. Eligible patients will be randomised either to Hospital at Home care in their own environment or usual hospital care. The intervention consists of hospital level care provided at patients’ homes, including visits from healthcare professionals, diagnostics (laboratory tests, blood cultures) and treatment. The control group will receive usual hospital care. Measurements will be conducted at baseline, during admission, at discharge and at 3 and 6 months after the baseline assessment.Ethics and disseminationInstitutional ethics approval has been granted. The findings will be disseminated through public lectures, professional and scientific conferences, as well as peer-reviewed journal articles. The study findings will contribute to knowledge on the implementation of Hospital at Home care for older patients with cognitive disorders. The results will be used to inform and support strategies to deliver eligible care to older patients with cognitive impairment.Trial registration numberNTR6581; Pre-results.

Research Progress on the Bamboo Timber Preservation

2010 ◽  
Vol 159 ◽  
pp. 216-221 ◽  
Author(s):  
Ya Di Liu ◽  
Wen Jin Liu
Keyword(s):  
Physiological Characteristics ◽  
Research Progress ◽  
General Situation ◽  
Development Trends ◽  
Composite Board ◽  
Existing Problems ◽  
Furniture Manufacturing ◽  
Systematic Understanding ◽  
At Home

With the extensive utilization of the bamboo industrialization, especially in developmental fields of bamboo-based panel, bamboo composite board, bamboo decoration, furniture manufacturing, which makes the application of bamboo have a broader prospect. However, the bamboo and its products in process of processing, transport and implementation often appear mildew, decay, moth-eaten, especially the mildew, it not only affects the appearance of bamboo and its products, but also creates damage conditions for other bacteria and insects. Therefore, bamboo timber preservation processing is the essential link for using bamboo industrialization. From the kinds of bamboo mould and its physiological characteristics, anti-mould technology and the types of mould inhibitor, this paper introduces the general situation at home and abroad and the existing problems and development trends of bamboo timber preservation, aiming to have a more comprehensive and systematic understanding of people for the bamboo mould and timber preservation, and to provide references for further study on the comprehensive anti-mould technology and preparation.

scholarly journals PLANNING SOLUTIONS FOR SPACES FOR REMOTE OPERATION

2021 ◽  
Vol 9 (4) ◽  
pp. 86-90
Author(s):  
Ol'ga Shirokova ◽  
Alena Pavlyuk
Keyword(s):  
Regulatory Framework ◽  
Use Cases ◽  
Remote Work ◽  
Advantages And Disadvantages ◽  
Planning Decisions ◽  
Remote Operation ◽  
Work At Home ◽  
Negative Factors ◽  
At Home

This article explores the possibilities of remote work. A definition is given, a regulatory framework is identified. The main advantages and disadvantages are analyzed. The negative factors that make it difficult to carry out work at home are identified. To compensate for the proposed use cases of spaces, also called co-working spaces. For the organization of remote work, there are five groups of needs. To meet the needs of the appropriate jobs. These are isolated rooms, open areas, meeting rooms, creative workshops, and rooms for group activi-ties. Typical modular planning solutions consisting of four zones: an office zone, which includes the listed types of premises, a zone of administrative and office premises, a zone of administrative and office premises, a leisure and rec-reation area. If necessary, the possibility of planning decisions is provided.

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