Autonomous Solar-Wind Power Forecasting Systems

2015 ◽  
Vol 1097 ◽  
pp. 59-62
Author(s):  
Alena Okhorzina ◽  
Alexey Yurchenko ◽  
Artem Kozloff
Keyword(s):  
Mathematical Model ◽  
Solar Wind ◽  
Power Systems ◽  
Far East ◽  
Experimental Studies ◽  
Photovoltaic Module ◽  
Photovoltaic Modules ◽  
Photovoltaic Power ◽  
The Far East ◽  
Climatic Testing

The paper reports on the results of climatic testing of silicon photovoltaic modules and photovoltaic power systems conducted in Russia (Siberia and the Far East). The monitoring system to control the power system work was developed. Testing over 17 years and a large amount of experimental studies enabled us to develop a precise mathematical model of the photovoltaic module in natural environment taking into account climatic and hardware factors.

scholarly journals Mathematical Models and Algorithms of Optimal Load Management of Electricity Consumers

2019 ◽  
Vol 62 (6) ◽  
pp. 528-535 ◽  
Author(s):  
I. U. Rakhmonov ◽  
K. M. Reymov
Keyword(s):  
Mathematical Model ◽  
Power Systems ◽  
Power System ◽  
Experimental Studies ◽  
Optimal Planning ◽  
Short Term ◽  
Planning Period ◽  
Efficient Operation ◽  
Load Profile ◽  
Optimal Load

Load profile alignment based on optimal power consumption management is considered to be one of the main ways to ensure efficient operation of energy systems in the short-term planning. Alignment load profile with a view to reducing costs can be implemented with the aid of consumers’ involvement by administrative and economic measures. Administrative measures are associated with the forced restriction of consumer loads in certain intervals of the planning period. On one hand, these measures provide benefits to the power system by alignment load profile, and on the other hand, they cause detriment to consumers. Ultimately, in some cases, for the whole power system, the detriment may be greater than the benefits. Therefore, it is advisable to use administrative measures in conditions of shortage of power and electricity in the power system. Optimal planning of short-term regimes of power systems according to rigid load profile received after alignment can be carried out by traditional methods. The solution of such a problem ought to be initially carried out under conditions of non-rigid load profile resulting from the directive use of administrative and economic measures carried out with the help of specially developed models. In this regard, the paper proposes a mathematical model of the problem of optimizing load profile of regulated electricity consumers to be used for optimal planning of shortterm power system modes, an algorithm for optimal planning of a short-term power system mode with optimizing load profile of regulated power consumers. Also, algorithms are proposed for accounting for simple and functional constraints in the form of equalities and inequalities when optimizing load profile. The effectiveness of the described algorithm for optimizing the short-term mode of the power system, taking into account the optimal load control of adjustable electricity consumers, has been studied using the example of optimal coverage of the load profile of power system, which contains two consumers with adjustable load profile, and two TPPs. Based on the calculated-and-experimental studies, it was determined that the proposed mathematical model of the problem is adequate, while the developed algorithms for optimal planning of short-term power system modes with optimization of load profile of regulated electricity consumers and taking into account various types of limitations are of high computational qualities.

Theoretical analysis of briquetting process of wood materials crushed under conditions of forest terminal

2021 ◽  
Vol 9 ◽  
Author(s):  
O. A. Kunitskaya ◽  
◽  
A. V. Pomiguyev ◽  
D. D. Burmistrova ◽  
E. A. Tikhonov ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Theoretical Analysis ◽  
Energy Supply ◽  
Far East ◽  
Small Distance ◽  
Wood Waste ◽  
High Quality ◽  
The Far East

Very long distances of export of harvested wood in Siberia and the Far East increasingly pose the problem of optimizing the operation of forest transport, including the coefficient of full-weight load of exported timber. The problem can be solved by the use of the technology of forest terminals (non-permanent forest warehouses), which are created at a small distance from developed forest areas, equipped with mobile woodworking equipment driven by the tractor power take-off shaft. Timber terminals mainly produce semi-finished products, such as timber which is then transported to sawmills and cut into high-quality lumber. The wood waste produced at the forest terminal can be used to produce compressed biofuel, for example, fuel briquettes which can then be used for the energy supply for the forest terminal itself. A mathematical model for analyzing the operation of briquetting crushed wood materials at forest terminals is presented. Keywords: forest terminal, wood waste, briquetting, mathematical model.

scholarly journals An Improved Mathematical Model for Computing Power Output of Solar Photovoltaic Modules

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Abdul Qayoom Jakhrani ◽  
Saleem Raza Samo ◽  
Shakeel Ahmed Kamboh ◽  
Jane Labadin ◽  
Andrew Ragai Henry Rigit
Keyword(s):  
Mathematical Model ◽  
Numerical Methods ◽  
Power Output ◽  
Time Series Data ◽  
Meteorological Data ◽  
Lambert W Function ◽  
Series Data ◽  
Photovoltaic Module ◽  
Photovoltaic Modules ◽  
Input Parameters

It is difficult to determine the input parameters values for equivalent circuit models of photovoltaic modules through analytical methods. Thus, the previous researchers preferred to use numerical methods. Since, the numerical methods are time consuming and need long term time series data which is not available in most developing countries, an improved mathematical model was formulated by combination of analytical and numerical methods to overcome the limitations of existing methods. The values of required model input parameters were computed analytically. The expression for output current of photovoltaic module was determined explicitly by Lambert W function and voltage was determined numerically by Newton-Raphson method. Moreover, the algebraic equations were derived for the shape factor which involves the ideality factor and the series resistance of a single diode photovoltaic module power output model. The formulated model results were validated with rated power output of a photovoltaic module provided by manufacturers using local meteorological data, which gave ±2% error. It was found that the proposed model is more practical in terms of precise estimations of photovoltaic module power output for any required location and number of variables used.

scholarly journals Mathematical models and algorithms of optimal load management of electrical consumers

2020 ◽  
Vol 216 ◽  
pp. 01166
Author(s):  
K M Reymov ◽  
G M Turmanova ◽  
S K Makhmuthonov ◽  
B A. Uzakov
Keyword(s):  
Mathematical Model ◽  
Power Systems ◽  
Power System ◽  
Experimental Studies ◽  
Optimal Planning ◽  
Short Term ◽  
Planning Period ◽  
Efficient Operation ◽  
Load Profile ◽  
Optimal Load

The article investigated the static, dynamic and metrological characteristics of new magnetoelastic force sensors taking into account the distribution of Load profile smoothing based on optimal power management is considered to be one of the main ways to ensure efficient operation of energy systems in the short-term planning. Smoothing load profile with a view to reducing costs can be implemented on the ways in which consumers could be affected by administrative and economic measures. Administrative measures are associated with the forced restriction of consumer loads in certain intervals of the planning period. On the one hand, these measures provide benefits to the power system by smoothing load profile, and on the other hand, they cause damage to consumers. Ultimately, in some cases, the damage may be greater than the benefits as a whole to the power system. Therefore, it is advisable to use them in conditions of shortage of power and electricity in the power system. Optimal planning of short-term regimes of power systems according to received, after alignment, rigid load profile can be carried out by traditional methods. The solution of such a problem can be initially carried out under conditions of non-rigid load profile resulting from the directive use of administrative and economic measures carried out with the help of specially developed models. In this regard, the paper proposes a mathematical model of the problem of optimizing load profile of regulated electrical consumers with optimal planning of short-term power system modes, an algorithm for optimal planning of a short-term power system mode with optimizing load profile of regulated power consumers. And also, algorithms are proposed for accounting for simple and functional constraints in the form of equalities and inequalities when optimizing load profile. The effectiveness of the described algorithm for optimizing the short-term mode of the power system, taking into account the optimal load control of adjustable electric locomotives, has been studied using the example of optimal coverage of the load profile of power system, which contains two consumers with adjustable load profile, and two TPPs. Based on the calculated experimental studies computational qualities, it was determined that the proposed mathematical model of the problem is adequate, the developed algorithms for optimal planning of short-term power system modes with optimization of load profile of regulated electric consumers and taking into account various types of limitations have high computational qualities.

The pig as an intermediate host for Taiwan Taenia infection

1990 ◽  
Vol 64 (3) ◽  
pp. 223-231 ◽  
Author(s):  
P. C. Fan ◽  
W. C. Chung ◽  
C. Y. Lin ◽  
C. C. Wu
Keyword(s):  
New Species ◽  
Far East ◽  
Experimental Studies ◽  
Liver Parenchyma ◽  
Infection Rates ◽  
Intermediate Hosts ◽  
The Far East ◽  
Young Pigs ◽  
Liver Surface ◽  
A New Species

ABSTRACTEggs (1000–100 000/animal) of Taiwan Taenia were inoculated per os into 14 Small-Ear-Miniature (SEM), 19 Landrace-Small-Ear-Miniature (L-SEM), and 5 Duroc-Yorkshire-Landrace (DYL) pigs. These animals were sacrificed 7–107 days after infection. Thirty-four pigs were found to be infected with Taiwan Taenia cysticerci and the infection rates of SEM, L-SEM, and DYL were 86%, 89% and 100% respectively. The cysticerci recovery rates of SEM, L-SEM and DYL pigs were 27·2%, 1·7% and 0·27% respectively. Cysticerci were recovered only from the livers and none were found in muscles, viscera or other parts of the carcasses. More cysticerci were located in the liver parenchyma (71%) than on the liver surface (29%). Taiwan Taenia cysticerci were smaller than those of classical T. saginata or T. solium. Moreover, Taiwan Taenia cysticerci had 2 rows of rudimentary hooklets on the scolex. The results of this study indicate that young pigs are good intermediate hosts for Taiwan Taenia and that the SEM pig is a satisfactory host for experimental studies with this tapeworm. These results were similar to other studies with different geographic strains of the T. saginata-like tapeworm in the Far East. These strains appear to be the same and possibly a new species.

Design of WSN Sensor Node for Solar Photovoltaic Modules

2012 ◽  
Vol 229-231 ◽  
pp. 1316-1319
Author(s):  
Peng Yang ◽  
Chu Yan Shen ◽  
Wang Wang Shi
Keyword(s):  
Sensor Node ◽  
Photovoltaic Module ◽  
Solar Photovoltaic ◽  
The Sun ◽  
Loop Current ◽  
Main Program ◽  
Timing Acquisition ◽  
Photovoltaic Modules ◽  
Photovoltaic Power ◽  
Quality And Reliability

Photovoltaic module is an important part of photovoltaic power generation, so the quality and reliability of Photovoltaic modules directly determine the whole (PV) power system’s stability. Design a JN5139 as control core based on the solar Photovoltaic modules of WSN sensor node. This paper firstly analyzes the sun batteries testing principle, then from two aspects of hardware and software this sensor node in detail, including hardware JN5139 timing acquisition by the output of solar cell piece voltage, current and bypass the diode loop current, judge battery slice of actual work; Software from main program respectively, AD son conversion program, etc are introduced. With the data of experiment collecting, the node is analyzed and evaluated.

scholarly journals PROSPECTS FOR THE DEVELOPMENT OF DISTRIBUTED GENERATION BASED ON RENEWABLE ENERGY SOURCES IN THE TERRITORY OF THE FAR EAST OF RUSSIA

2021 ◽  
pp. 68-71
Author(s):  
YULIA VLADIMIROVNA KHONDOSHKO ◽  
Keyword(s):  
Solar Wind ◽  
Renewable Energy ◽  
Distributed Generation ◽  
Geothermal Energy ◽  
Renewable Energy Sources ◽  
Far East ◽  
Energy Sources ◽  
Far East Of Russia ◽  
Energy Potential ◽  
The Far East

The article discusses the prospects for the development of distributed generation facilities based on renewable energy sources, assesses the energy potential of solar, wind, biomass, geothermal energy.

scholarly journals An Improved Nonlinear Five-Point Model for Photovoltaic Modules

2013 ◽  
Vol 2013 ◽  
pp. 1-11 ◽  
Author(s):  
Sakaros Bogning Dongue ◽  
Donatien Njomo ◽  
Lessly Ebengai
Keyword(s):  
Mathematical Model ◽  
Solar Irradiance ◽  
Nonlinear Effects ◽  
Photovoltaic Module ◽  
Economic Returns ◽  
Point Model ◽  
Simulation Tools ◽  
Photovoltaic Modules ◽  
Pv Panel ◽  
Pv Modules

This paper presents an improved nonlinear five-point model capable of analytically describing the electrical behaviors of a photovoltaic module for each generic operating condition of temperature and solar irradiance. The models used to replicate the electrical behaviors of operating PV modules are usually based on some simplified assumptions which provide convenient mathematical model which can be used in conventional simulation tools. Unfortunately, these assumptions cause some inaccuracies, and hence unrealistic economic returns are predicted. As an alternative, we used the advantages of a nonlinear analytical five-point model to take into account the nonideal diode effects and nonlinear effects generally ignored, which PV modules operation depends on. To verify the capability of our method to fit PV panel characteristics, the procedure was tested on three different panels. Results were compared with the data issued by manufacturers and with the results obtained using the five-parameter model proposed by other authors.

scholarly journals Design and development of a wireless sensor network time synchronization system for photovoltaic module monitoring

2020 ◽  
Vol 16 (5) ◽  
pp. 155014772092734
Author(s):  
Xianbo Sun ◽  
Yixin Su ◽  
Yong Huang ◽  
Jianjun Tan ◽  
Jinqiao Yi ◽  
...  
Keyword(s):  
Wireless Sensor Network ◽  
Power Plant ◽  
Sensor Network ◽  
Energy Efficient ◽  
Time Synchronization ◽  
Wireless Sensor ◽  
Photovoltaic Module ◽  
Photovoltaic Modules ◽  
Photovoltaic Power ◽  
Synchronization Algorithm

Since the working situation of photovoltaic modules cannot be tracked in the real time and defective components cannot be located and controlled specifically, a remote monitoring system of photovoltaic modules based on wireless sensor networks is designed to improve the management efficiency of photovoltaic power plants. The monitoring data (current, voltage, and illumination, etc.) of photovoltaic modules are collected by the wireless sensor network nodes in real time, and then, there are orderly transmitted to the coordinator and server by the ZigBee communication protocol with the time synchronization algorithm. Time synchronization algorithm based on Gaussian delay model performs best in synchronization accuracy and energy-efficient reference broadcast synchronization algorithm is the most advantageous in synchronization energy consumption. Adaptive energy–efficient reference broadcasting synchronization algorithm is proposed with a balance between energy consumption and accuracy, which is applicable to large networks and thus conducive to the application of wireless sensor network in large-scale photovoltaic module monitoring. With the analysis and processing of the received data, the situation of the photovoltaic modules can be accordingly judged and thus the information management of photovoltaic power plant can be realized. For a photovoltaic power plant with a total power output of 100 kW and with 400 photovoltaic modules, experimental results show that the overall efficiency of the photovoltaic power plant can be increased by a wide margin.

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