Development of Power Supply-Demand Balance and Frequency Simulation Models of All TSO's Control Area in Japan

2020 ◽  
Vol 140 (2) ◽  
pp. 57-67 ◽  
Author(s):  
Keita Tokumitsu ◽  
Hiroyuki Amano
Keyword(s):  
Power Supply ◽  
Simulation Models ◽  
Control Area

scholarly journals Significant factors affecting the selection of rational options for power supply in an off-grid zone

2019 ◽  
Vol 77 ◽  
pp. 02006
Author(s):  
Ivanova Irina
Keyword(s):  
Power Supply ◽  
Methodological Approach ◽  
Simulation Models ◽  
Economic Indicators ◽  
Factors Affecting ◽  
Fuel Delivery ◽  
Generating Equipment ◽  
Selection Of ◽  
Significant Factors

The paper presents a short characteristic of an off-grid zone in the eastern regions of the Russian Federation. The main problems of power supply to consumers in this zone are described, and possible options for solving them are provided. A methodological approach and model tools to estimate the efficiency of alternative options of power supply to off-grid consumers are described. The factors affecting the selection of a rational option of power supply in the off-grid zone are classified. We show the interconnection between the main significant factors (availability of grid infrastructure, local fuel resources, complexity of fuel delivery logistics, characteristics of accessible power-generating equipment, and environmental constraints) and their impact on economic indicators of alternative options. Based on the systematized results of long-term studies, we present a scheme designed to select a rational option of power supply to a particular off-grid consumer according to characteristics of the described factors. Keywords: Off-grid consumers, alternative options, impact of factors, economic indicators, methodological approach, simulation models, economic efficiency.

A Study on Multistage Coordination and Control Strategy for JiBei Grid Considering Wind Power Fluctuation

2014 ◽  
Vol 635-637 ◽  
pp. 1194-1198
Author(s):  
Jian Fei Xu ◽  
Yu Jie Xu ◽  
Feng Lu ◽  
Dun Nan Liu ◽  
Peng Yuan Li
Keyword(s):  
Wind Power ◽  
Power Supply ◽  
Control Method ◽  
Hierarchical Control ◽  
Clean Energy ◽  
Control Area ◽  
Power Fluctuation ◽  
Wind Fluctuation ◽  
And Control ◽  
Coordination And Control

The establishment of independent control area for JiBei grid will improve the flexibility of regulation for local units, and absorb more wind power and other clean energy. However, due to the high proportion of wind power capacity and the fluctuation and intermittent of wind power, it presents a challenge to the power supply safety. In this paper, based on the prediction of regulation demand and regulation speed in different time scales, dynamic hierarchical control method is proposed. Several strategies of hierarchical control under the emergency of steady climbing, reverse and fluctuations are established. Hence, it improves the capacity of power supply safety and the proportion of wind absorption. Finally, based on the measurement of characteristics of wind fluctuation, the value of reserve capacity in different control levels is calculated.

Vehicle Performance Simulation of Electric Bus with Composite Power Supply Based on Secondary Development of Advisor

2012 ◽  
Vol 588-589 ◽  
pp. 368-373
Author(s):  
Dong Jie Pei ◽  
Dong Chen Qin ◽  
Xing Wang ◽  
Jiu Shi Liu
Keyword(s):  
Power Supply ◽  
Fuzzy Theory ◽  
Storage System ◽  
Simulation Models ◽  
Basic Structure ◽  
Energy Storage System ◽  
Vehicle Performance ◽  
Assembly Simulation ◽  
Electric Bus ◽  
Composite Energy

In order to improve the performance of the electric buses，composite power system is designed，which is analyzed and verified by the simulation using the software of Advisor. Advisor is secondary developed by updating assembly simulation models and vehicle models. The basic structure of composite energy storage system and the control strategy based on fuzzy theory are designed, and the simulation of vehicle performance is done under the road cycle of UDDS, and then compares with the bus with only batteries. The result shows that ultra-capacitor has a prominent "clipped peak and filled channel" protection for the battery, recovers energy commendably, and extends the battery’s life. The electric bus with composite power supply can meet the requirement of vehicle performance, and its indexes of all aspects are better than the electric bus with only batteries.

scholarly journals THE DEPENDENCE OF THE ELECTRODYNAMIC CHARACTERISTICS OF THE MICROSTRIP PHASED ARRAY SUBARRAY ON THE METHOD OF POWER SUPPLY

T-Comm ◽  
2021 ◽  
Vol 15 (4) ◽  
pp. 57-64
Author(s):  
Evgeny V. Ukhanov ◽  
◽  
Roman V. Terekhin ◽  
Sofia R. Kosichkina ◽  
Konstantin V. Strygin ◽  
...  
Keyword(s):  
Power Supply ◽  
High Frequency ◽  
Phased Array ◽  
Simulation Models ◽  
Individual Characteristics ◽  
Microwave Technology ◽  
Special Shape ◽  
Scanning Angle ◽  
Field Modeling ◽  
Electrodynamic Modeling

Microwave technology in microstrip design is widely used in various antenna systems. The active use of phased array (PA) of this type makes developers around the world search for various options of its construction. To improve individual characteristics, in particular, expand the scanning angle, as well as optimize the configuration of the excitation of the PA, they use subarrays that combine a given number of elements of the entire array. In this paper, we considered various options for constructing microstrip PA subarrays made on a homogeneous substrate from a high-frequency laminate GIL_GML 1000, in particular, various methods for their excitation. Using modern, accurate 3D electrodynamic modeling environment and HF device analysis, we studied changes in the electrodynamic characteristics of the simulation model of a multi-element microstrip PA subarray, depending on how the excitation is organized. This article discusses three simulation models of subarrays for microstrip PA with various options for their excitation. All subarrays have a radiation pattern of a special shape. After calculating the main characteristics, the issue of the most preferred organization of subarray power supply for the developed PA was solved. It is shown that in practice, the study of parameters and decision-making on the design of complex microwave devices, possibly without expensive field modeling.

scholarly journals Research on the Remote Deployment Design of OTN Electrical Racks

2020 ◽  
pp. 117-129
Author(s):  
Tianpu Yang ◽  
Junshi Gao ◽  
Haitao Wang ◽  
Guangchong Dai ◽  
Rui Zhai
Keyword(s):  
Power Supply ◽  
Rapid Development ◽  
Simulation Models ◽  
Air Conditioner ◽  
Multimedia Services ◽  
Transmission Bandwidth ◽  
Exponential Increase ◽  
Optical Layer

AbstractThe rapid development of 4G and multimedia services drives the exponential increase of the demand for transmission bandwidth. The OTN technology therefore emerges. In recent years, the number of OTN devices in backbone and core equipment rooms has increased sharply. However, due to factors such as equipment room planning, air conditioner, and power supply, new electrical racks cannot be installed in the same equipment room as original optical racks during OTN expansion of 80-wavelength systems. The remote deployment of OTN electrical racks has certain impact on OTN system indicators, OM/OD, and OTU optical-layer parameters. This document analyzes the factors that are affected by the remote deployment of OTN electrical racks, creates simulation models based on scenarios, and provides suggestions on the remote deployment design of OTN electrical racks.

scholarly journals Analysis and Synthesis of Control Systems for Spacecraft Solar Arrays

Machines ◽  
2020 ◽  
Vol 8 (4) ◽  
pp. 64
Author(s):  
Anatoly K. Tishchenko ◽  
Eugeny M. Vasiljev ◽  
Artyom O. Tishchenko
Keyword(s):  
Control System ◽  
Power Supply ◽  
Pulse Width Modulation ◽  
Simulation Models ◽  
Operating Conditions ◽  
Solar Panel ◽  
Hierarchical Organization ◽  
Solar Panels ◽  
Solar Arrays ◽  
Reliable Power Supply

The paper is devoted to the problem of creating highly reliable power supply systems for spacecrafts intended for long-term autonomous flights. Within its framework, the problem of synthesizing a control system for solar arrays is being solved. To solve this problem, a mathematical model of a solar panel was compiled, and a study of its static and dynamic characteristics was carried out. It was found that when the solar panel is controlled using a shunt switch with pulse-width modulation, resonance phenomena appear in the system, leading to an unacceptable change in the polarity of voltages on the photocells. The operating conditions of the solar panels, which exclude the occurrence of the indicated alternating voltages, are found, and appropriate recommendations are given for the choice of the quantization frequency in the system. On the basis of the recommendations received, the transition to a quasi-continuous representation of the control system was carried out, and a graphic-analytical synthesis of the controller providing the required quality indicators of the system was carried out. To ensure the survivability of the power supply system, a method is proposed for the hierarchical organization of the interaction of solar panels, which reproduces the homeostatic properties of biological structures in the system. This property is provided by automatic transfer of control to subsequent levels of the hierarchy as the energy resources of the previous levels are exhausted. In addition, selective control is applied only to that part of the total generated power, which is sufficient to counter the current disturbing influences on the system. This approach to control prevents cascading failures in the system. The paper presents simulation models on which all theoretical positions and methods proposed in the work are tested.

Research on a New Type of Plating Power Supply

2014 ◽  
Vol 513-517 ◽  
pp. 3518-3521
Author(s):  
Yi Hong He ◽  
Shui Yong Yu
Keyword(s):  
Power Factor ◽  
Power Supply ◽  
Pulse Generator ◽  
High Harmonic ◽  
Simulation Models ◽  
Pwm Rectifier ◽  
Soft Switch ◽  
Pwm Converter ◽  
Harmonic Content ◽  
New Type

Viewing the problems of lower power factor, high harmonic content, lots of switch losses in tubes of lagging bridge arm when using FB-ZVS-PWM converter in plating power supply, this paper applied the three-level PWM rectifier technology to electroplating power supply, A new converter has been researched. Both different converters have also been compared and analyzed. Phase shift pulse generator and simulation models have been established in Matlab/Simulink. The results show that the PS-FB-ZVZCS PWM converter is more suitable for plating power supply, phases of current and voltage are synchronous, it has the advantages of higher power factor, low harmonic content. All the switch tubes have achieved soft switch, reducing the switch losses, it can improve the efficiency and its performance effectively.

New replica method with plasma polymerized film by glow discharge

1988 ◽  
Vol 46 ◽  
pp. 414-415
Author(s):  
A. Tanaka ◽  
M. Yamaguchi ◽  
T. Hirano
Keyword(s):  
Power Supply ◽  
Plasma Polymerization ◽  
Vacuum Chamber ◽  
Complex Surface ◽  
Replica Method ◽  
Metal Extraction ◽  
High Voltage Power Supply ◽  
Negative Glow ◽  
Hydrocarbon Gas ◽  
Hydrocarbon Molecules

The plasma polymerization replica method and its apparatus have been devised by Tanaka (1-3). We have published several reports on its application: surface replicas of biological and inorganic specimens, replicas of freeze-fractured tissues and metal-extraction replicas with immunocytochemical markers.The apparatus for plasma polymerization consists of a high voltage power supply, a vacuum chamber containing a hydrocarbon gas (naphthalene, methane, ethylene), and electrodes of an anode disk and a cathode of the specimen base. The surface replication by plasma polymerization in negative glow phase on the cathode was carried out by gassing at 0.05-0.1 Torr and glow discharging at 1.5-3 kV D.C. Ionized hydrocarbon molecules diffused into complex surface configurations and deposited as a three-dimensionally polymerized film of 1050 nm in thickness.The resulting film on the complex surface had uniform thickness and showed no granular texture. Since the film was chemically inert, resistant to heat and mecanically strong, it could be treated with almost any organic or inorganic solvents.

Correlation of Pore Structure and Permeability by SEM-Image Analysis

1990 ◽  
Vol 48 (1) ◽  
pp. 428-429
Author(s):  
C. A. Callender ◽  
Wm. C. Dawson ◽  
J. J. Funk
Keyword(s):  
Image Analysis ◽  
Pore Structure ◽  
Imaging System ◽  
Pore Space ◽  
Simulation Models ◽  
Image Analyzer ◽  
Imaging Data ◽  
Sem Images ◽  
Thin Sections ◽  
Rock Types

The geometric structure of pore space in some carbonate rocks can be correlated with petrophysical measurements by quantitatively analyzing binaries generated from SEM images. Reservoirs with similar porosities can have markedly different permeabilities. Image analysis identifies which characteristics of a rock are responsible for the permeability differences. Imaging data can explain unusual fluid flow patterns which, in turn, can improve production simulation models.Analytical SchemeOur sample suite consists of 30 Middle East carbonates having porosities ranging from 21 to 28% and permeabilities from 92 to 2153 md. Engineering tests reveal the lack of a consistent (predictable) relationship between porosity and permeability (Fig. 1). Finely polished thin sections were studied petrographically to determine rock texture. The studied thin sections represent four petrographically distinct carbonate rock types ranging from compacted, poorly-sorted, dolomitized, intraclastic grainstones to well-sorted, foraminiferal,ooid, peloidal grainstones. The samples were analyzed for pore structure by a Tracor Northern 5500 IPP 5B/80 image analyzer and a 80386 microprocessor-based imaging system. Between 30 and 50 SEM-generated backscattered electron images (frames) were collected per thin section. Binaries were created from the gray level that represents the pore space. Calculated values were averaged and the data analyzed to determine which geological pore structure characteristics actually affect permeability.

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