scholarly journals Study on Topology and Control Strategy of High-Precision and Wide-Range Hybrid Converter for Photovoltaic Cell Simulator

Energies ◽  
2018 ◽  
Vol 12 (1) ◽  
pp. 39
Author(s):  
Jianfei Zhao ◽  
Minqi Hua ◽  
Tingzhang Liu ◽  
Tao Yu
Keyword(s):  
Control Strategy ◽  
Power Supply ◽  
High Performance ◽  
Photovoltaic Cell ◽  
Programmable Logic ◽  
Motor Simulation ◽  
Hybrid Topology ◽  
Wide Range ◽  
Cell Simulation ◽  
And Control

Aiming at the function and technical requirements of high-power photovoltaic cell simulation, high-performance programmable logic power supply and dc motor simulation, a high frequency isolation hybrid topology and control strategy based on current-source/voltage-source converter was studied and proposed. Firstly, according to the performance requirements of photovoltaic cell analog power supply, the control strategy requirements of the high-precision wide-range hybrid topology were proposed. Secondly, the working principle of the new hybrid topology was analyzed. At the same time, the equivalent model of the new hybrid topology was simplified and established, and the overall control strategy of the hybrid topology based on current compensation and sliding mode variable structure was proposed. Finally, simulation and experimental research on the hybrid topology was carried out, and the experimental test of photovoltaic cell simulation was completed. The simulation and experimental results show that the hybrid topology and control strategy proposed in this paper has the characteristics of wide-range output regulation, fast dynamic response, high efficiency and high power factor, and can be used for high performance photovoltaic cell simulation, programmable logic power supply and DC motor simulation.

scholarly journals A Preventive Strategy of Voltage Stability based on Characteristic Analysis

2019 ◽  
Vol 115 ◽  
pp. 01001
Author(s):  
Zhen Hu ◽  
Ding Wang ◽  
Yangwu Shen ◽  
Daojun Chen ◽  
Yongyan Liu
Keyword(s):  
Control Strategy ◽  
Power Supply ◽  
Prevention And Control ◽  
Voltage Stability ◽  
Power Grid ◽  
Preventive Strategy ◽  
Characteristic Analysis ◽  
Node Voltage ◽  
And Control ◽  
The Impact

The purpose of voltage stability prevention and control strategy is to minimize the impact of expected accidents on the whole power grid while ensuring safe power supply. In this paper, it is expected that the accident has a large impact on the system voltage and makes the voltage margin of each node low. in order to not only adjust the node voltage, but also reduce the disturbance impact, a voltage stability prevention and control strategy is proposed based on the characteristic analysis.

New Control Strategy for High-Frequency Digital Inverter Power Supply

2013 ◽  
Vol 772 ◽  
pp. 443-447
Author(s):  
Yi Wang Wang
Keyword(s):  
Induction Heating ◽  
Control Strategy ◽  
Power Supply ◽  
High Frequency ◽  
Effective Control ◽  
Strong Nonlinearity ◽  
Wide Range ◽  
Inverter Power Supply ◽  
Control Technologies ◽  
High Frequency Induction

The inverter power supply system has strong nonlinearity and parameter variability, especially in the non-linear loads, conventional control technology is difficult to achieve effective control and get the ideal control effect. Aiming at the control requirements of single-phase high-frequency induction heating inverter supply power control applications, uses a novel multiple and composite control technologies to achieve rapid power modulation control of inverter. The components and design principles of proposed control system were introduced in detail. The inverter power system model based on the new control strategy has been built, and inverter prototype used for high-frequency induction heating was designed. The experimental results show that the proposed control method to obtain better dynamic characteristics than the conventional control technologies, and has good advantages of system steady-state accuracy, robustness and control qualities, which has wide range of application.

scholarly journals High Performance Control Strategy of a LCC HVDC System for Power System Enhancement

2019 ◽  
Vol 8 (6S3) ◽  
pp. 1765-1769
Keyword(s):  
Control Strategy ◽  
High Performance ◽  
Voltage Control ◽  
Good Judgment ◽  
Energy Control ◽  
Performance Control ◽  
Hvdc System ◽  
Extinction Angle ◽  
Wide Range ◽  
Set Up

It is well-known that traditional LCC HVDC system is not capable of control its reactive strength and terminal AC voltages. This paper investigates the reactive electricity and AC voltages manage at the inverter aspect of the LCC HVDC system with controllable capacitors. The system’s capability of operating below poor extinction angle is utilized to reap a wide range of reactive energy control and, mainly, the capacity of exporting reactive electricity. The effectiveness of the reactive strength/voltage control functionality for the proposed device is demonstrated via simulation outcomes the use of actual Time digital Simulator (RTDS). To verify the effectiveness of the reactive electricity and voltage control, CCC HVDC and LCC HVDC with SVC are also set up in RTDS. The proposed idea makes an integration of Fuzzy good judgment which assists in accurate control of capacitors and makes the device green by means of lowering the consumption of Reactive energy. All of the outcomes are acquired from the MATLAB simulations and numerous graphs are plotted.

Activity Analysis at Low Power Supply on 45nm Technology

2011 ◽  
Author(s):  
Guillaume Bascoul ◽  
Philippe Perdu ◽  
Kevin Sanchez ◽  
Dean Lewis ◽  
Sylvain Dudit ◽  
...  
Keyword(s):  
Integrated Circuits ◽  
Low Power ◽  
Power Supply ◽  
Control Line ◽  
Time Resolved ◽  
Analysis Task ◽  
Wide Range ◽  
Complex Functions ◽  
Time Resolved Imaging ◽  
And Control

Abstract VLSI internal testing through silicon substrate has been widely studied and techniques like Time Resolved Emission has given impressive results. Nevertheless, Integrated Circuits (IC) are still evolving with more and more complex functions and various kinds of signals that could be split into two main categories: data and control. Controls activate specific block and according to the wide range of different blocks and device complexity, the first analysis task is to check block activity related to control line status. In this paper, we show how Time Resolved Imaging can precisely answer this challenge even in up-to-date technologies at low power supply.

MEMS Inertial Technology for Aerospace Applications

2006 ◽  
Author(s):  
Eric J. Lautenschlager
Keyword(s):  
High Performance ◽  
Performance Metrics ◽  
Aerospace Industry ◽  
The United States ◽  
Future Goals ◽  
Aerospace Applications ◽  
Wide Range ◽  
Error Terms ◽  
High Level ◽  
And Control

The aerospace industry has guidance, navigation, and control needs which make use of a number of inertial technology systems. MEMS based solutions can offer several advantages over conventional technologies and are being developed for a wide range of applications. This paper will review the broad inertial applications that exist for the aerospace industry, identify some of the current non-MEMS technologies used to meet those needs, and then discuss what advantages MEMS based solutions can provide. This will be followed by a high level explanation of the general operating principles of a MEMS gyroscope, as well as identification of key performance metrics and error terms that are used for sensor evaluation. Finally, there will be a discussion of some basic design considerations, a review of the current state of the art for performance, and future goals and directions for inertial MEMS technologies. NOTICE: High performance inertial technology is subject to restrictions imposed by the International Traffic in Arms Regulations (ITARS), and Export Administration Regulations (EAR). The use of these technologies, or information pertaining to these technologies, may be restricted from foreign nationals of the United States.

scholarly journals PLC Automation and Control Strategy in a Stirling Solar Power System

Energies ◽  
2020 ◽  
Vol 13 (8) ◽  
pp. 1917 ◽  
Author(s):  
Dan-Adrian Mocanu ◽  
Viorel Bădescu ◽  
Ciprian Bucur ◽  
Iuliana Ștefan ◽  
Elena Carcadea ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Control Strategy ◽  
Automation System ◽  
Programmable Logic ◽  
Solar Concentrator ◽  
Automation And Control ◽  
Conversion Unit ◽  
Solar Conversion ◽  
Working Parameters ◽  
And Control

The Stirling engine together with a solar concentrator represents a solution for increasing energy efficiency. Thus, within the National Research and Development Institute for Cryogenic and Isotopic Technologies, an automation system was designed and implemented in order to control the processes inside the solar conversion unit using a programmable logic controller from Schneider Electric. The acquired parameters from the installed sensors were monitored using Unity Pro L software. The main objective of this paper is to solve the starting, operating, and shut-down sequences in safe conditions, as well as monitor the working parameters.

scholarly journals Eliminating Stick-Slip Vibrations in Drill-Strings with a Dual-Loop Control Strategy Optimised by the CRO-SL Algorithm

Mathematics ◽  
2021 ◽  
Vol 9 (13) ◽  
pp. 1526
Author(s):  
Jorge Pérez-Aracil ◽  
Carlos Camacho-Gómez ◽  
Emiliano Pereira ◽  
Vahid Vaziri ◽  
Sumeet S. Aphale ◽  
...  
Keyword(s):  
Control Strategy ◽  
High Performance ◽  
Nonlinear Models ◽  
Drill String ◽  
Time Response ◽  
Fast Time ◽  
Parameter Uncertainties ◽  
Stick Slip ◽  
Loop Control ◽  
And Control

Friction-induced stick-slip vibrations are one of the major causes for down-hole drill-string failures. Consequently, several nonlinear models and control approaches have been proposed to solve this problem. This work proposes a dual-loop control strategy. The inner loop damps the vibration of the system, eliminating the limit cycle due to nonlinear friction. The outer loop achieves the desired velocity with a fast time response. The optimal tuning of the control parameters is carried out with a multi-method ensemble meta-heuristic, the Coral Reefs Optimisation algorithm with Substrate Layer (CRO-SL). It is an evolutionary-type algorithm that combines different search strategies within a single population, obtaining a robust, high-performance algorithm to tackle hard optimisation problems. An application example based on a real nonlinear dynamics model of a drill-string illustrates that the controller optimised by the CRO-SL achieves excellent performance in terms of stick-slip vibrations cancellation, fast time response, robustness to system parameter uncertainties and chattering phenomenon prevention.

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