Design and Construction of Grid Attached Storage Simulator

2011 ◽  
Author(s):  
Markus Lutz ◽  
Daniel Zimmerle ◽  
Brian Huff ◽  
Thomas Bradley
Keyword(s):  
Second Life ◽  
Frequency Regulation ◽  
State University ◽  
Variable Frequency Drive ◽  
Colorado State University ◽  
Dynamics And Control ◽  
Battery Degradation ◽  
Design Selection ◽  
And Control

Using a Variable Frequency Drive, 15kWh battery pack, and Active Front End control, Colorado State University has designed and built a real-world functional test stand to study the effects of attaching a battery power pack to the grid for grid stabilization. This paper describes the design, analysis, and construction of the Grid Attached Storage simulation laboratory. An in-depth discussion of the design, selection and specifications of components including the LCL filter, transformer, grid attachment, line synchronization card, software control, and safety measurements is discussed. The dynamics and control of grid-attached storage can be investigated using this lab. Battery temperatures, charging/discharging cycles, and battery degradation can also be better understood with the use of this system. Second life batteries can be used as well to investigate their characteristics, economical benefits, and quality of use. Using grid interaction, the batteries can work in a variety of ways including: frequency regulation, V2G simulation of opportunity charging, and renewable energy smoothing.

scholarly journals Dynamics and control of cereal bugs in spring barley crops in conditions of Right-bank Forrest-steppe of Ukraine

2021 ◽  
Vol 1 (99) ◽  
pp. 181-188
Author(s):  
R. V. Chukhrai ◽  
Keyword(s):  
Technical Efficiency ◽  
Yield Loss ◽  
Crop Yields ◽  
Spring Barley ◽  
Eurygaster Integriceps ◽  
Lygus Rugulipennis ◽  
National University ◽  
Dynamics And Control ◽  
And Control

Cereal bugs can reduce the yield of cereals, worsen the quality characteristics of grain, and reduce the sowing quality of seeds with intensive reproduction and nutrition. Of all the cereal bugs, Eurygaster integriceps Put is the most damaging. According to scientists, yield loss is typically estimated at 20–30 % in barley and 50–90 % in wheat. In addition to direct crop losses, insects also inject chemicals that dramatically reduce grain quality, with chemical pest control costing over $40 million annually. The aim of the research is to reveal data on the species diversity of cereal bugs in spring barley crops in the conditions of the Uman national university of horticulture and to control their numbers in order to preserve crop yields. Accounting and observations conducted in 2017–2020, in the training and production department of Uman National University of Horticulture. Analysis of the species composition of cereal bugs allowed to clarify the diversity of their species, establish their average number and identify species that are dangerous for cultures during the study period. It was established that five species of cereal bugs which were dangerous to culture were identified from a number of Hemiptera between 2017 and 2020. Four species of cereal bugs were constantly present in the agrocenosis of spring barley – Eurygaster integriceps Put., Aelia acuminata L., Lygus rugulipennis P. and Trigonotylus coelestialium Kirk.. The most dangerous pest for the culture was the species Eurygaster integriceps Put., Which accounted for 36 %, 28 %, 27 % and 24.5 % of the total number of bedbugs, and also exceeded the rate of harmful index. The use of insecticides reduced the number of Eurygaster integriceps Put. for a two-week period after spraying. Average data for 2018–2020 show high technical efficiency at the level of 90.0–92.9 % on the 3rd day after spraying. On the 7th day after the insecticides were applied, the technical efficiency was 85–85.8 %. Application of insecticide Decis Profi 25 WG, v.g. at a rate of 0.04 kg/ha, reduced the number of pests by 82.5 % on the 14th day after spraying.

scholarly journals EMPLOYMENT OF GRADUATES: EXPERIENCE, PROBLEMS AND PROSPECTS (ON THE EXAMPLE OF THE TARAZ STATE UNIVERSITY NAMED AFTER M.KH. DULATI)

2020 ◽  
Vol 66 (2) ◽  
pp. 205-210
Author(s):  
A.B. Abdualy ◽  
◽  
R.S. Amandossova ◽  
D.D. Tumabekova ◽  
◽  
...  
Keyword(s):  
Program Development ◽  
Management System ◽  
Information Technologies ◽  
State University ◽  
Professional Career ◽  
Marketing Program ◽  
Social Partnerships ◽  
And Control ◽  
The City

The article discusses significant problems of employment of students and graduates on the example of the Taraz State University named after M.Kh. Dulati, analyzed factors that can create barriers and obstacles when applying for a job upon completion of studies and in a specialty. The results of studies are presented, the opinions of graduates and employers on the quality of young specialists, the characteristics of hiring are analyzed. The employment management system for young specialists in the city is carried out at the coordination, local and municipal levels. This work includes the functions of analysis and forecasting, marketing, program development, the process of motivation and control. To promote collaboration betweenthe university,thegraduate and the employer on an ongoing basis, management is carried out through the regulation of a professional career, internships, social partnerships, as well as communicative and information technologies

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