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Adaptive under-voltage load shedding scheme for large interconnected smart grids based on wide area synchrophasor measurements

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IET GENERATION TRANSMISSION & DISTRIBUTION 2016年第8期10卷 1957-1968页

作者： Adewole, Adeyemi Charles Tzoneva, Raynitchka Apostolov, Alexander Cape Peninsula Univ Technol Ctr Substn Automat & Energy Management Syst Symphony Way ZA-7535 Cape Town South Africa

The existing local protection schemes for undervoltage protection in power systems are not engineered to protect the system against wide area disturbances. Therefore, system integrity protection schemes (SIPS) designed to preserve the integrity of the system are required. This study proposes a new response-based SIPS for adaptive undervoltage load shedding (UVLS) in large interconnected systems based on the IEEE C37.118.1-2011 synchrophasor measurements from widely dispersed phasor measurement units (PMUs) synchronised to the reference time of the global positioning system. The control signals to shed the feeder loads are based on high-speed IEC 61850 Generic Object Oriented Substation Event messages. The proposed adaptive UVLS-SIPS algorithm calculates in real-time the total amount of load to shed corresponding to the severity of the disturbance using the least squares algorithm. The amount of load to shed and its distribution across the interconnected system is based on a formulated reactive power mismatch and adaptive weighted summation real-time voltage stability assessment index, respectively. The proposed UVLS-SIPS algorithm was deployed onto a programmable logic controller (PLC), and was tested under various dynamic conditions using the New England 39-bus test system. Real-time simulations were conducted with an industrial-grade 'proof-of-concept' testbed.

关键词： load shedding smart power grids power system interconnection phasor measurement power system protection substation protection least squares approximations adaptive under-voltage load shedding scheme large interconnected smart grids wide area synchrophasor measurement unit local protection schemes undervoltage protection power systems system integrity protection schemes response-based SIPS IEEE C37.118.1-2011 synchrophasor measurements PMUs Global Positioning System control signals high-speed IEC 61850 generic object oriented substation event messages UVLS-SIPS algorithm least squares algorithm reactive power mismatch adaptive weighted summation real-time voltage stability assessment index programmable logic controller PLC New England 39-bus test system industrial-grade equipment phasor data concentrator me digital simulatormulator feeder loads

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Characterization of the coagulation process: wet-spinning tool development and void fraction evaluation

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TEXTILE RESEARCH JOURNAL 2016年第11期86卷 1210-1219页

作者： Weisser, Pauline Barbier, Gerald Richard, Christophe Drean, Jean-Yves Univ Haute Alsace Lab Phys & Mecan Text LPMT EA 43 Mulhouse France Kermel SAS Colmar France

Since very little research has been published on the wet-spinning process, this article is a contribution to understanding the coagulation phenomenon. In this work, the effects of spinning parameters on the evolution of the void fraction of coarse polyamide-imide monofilaments were investigated. First of all, an experimental wet-spinning device was designed in our laboratory. Robust and reliable, this prototyping tool allows a fully automated production, ensuring the reproducibility of the different spinning tests. A four-factor Design of Experiments was built to analyze the effects and combinations between the following parameters: extrusion diameter, concentration of the coagulation bath and drawing rates applied in the coagulation bath and in the air. The results derived from a statistical analysis coupled to a scanning electron microscope study showed a highly significant influence of the concentration of solvent in the coagulation bath, concerning the evolution of the void fraction of the obtained monofilaments.

关键词： wet-spinning void fraction polyamide-imide spinning tool programmable logic controller

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A metamorphic controller for plant control system design

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MODELING IDENTIFICATION AND CONTROL 2016年第3期37卷 159-169页

作者： Klopot, T. Skupin, P. Choinski, D. Cupek, R. Fojcik, M. Silesian Tech Univ Fac Automat Elect & Comp Sci Ul Akad 16 PL-44100 Gliwice Poland Sogn Og Fjordane Univ Coll Fac Sci & Engn Svanhaugevegen 1 N-6812 Forde Norway

One of the major problems in the design of industrial control systems is the selection and parameterization of the control algorithm. In practice, the most common solution is the PI (proportional-integral) controller, which is simple to implement, but is not always the best control strategy. The use of more advanced controllers may result in a better efficiency of the control system. However, the implementation of advanced control algorithms is more time-consuming and requires specialized knowledge from control engineers. To overcome these problems and to support control engineers at the controller design stage, the paper describes a tool, i.e., a metamorphic controller with extended functionality, for selection and implementation of the most suitable control algorithm. In comparison to existing solutions, the main advantage of the metamorphic controller is its possibility of changing the control algorithm. In turn, the candidate algorithms can be tested through simulations and the total time needed to perform all simulations can be less than a few minutes, which is less than or comparable to the design time in the concurrent design approach. Moreover, the use of well-known tuning procedures, makes the system easy to understand and operate even by inexperienced control engineers. The application was implemented in the real industrial programmable logic controller (PLC) and tested with linear and nonlinear virtual plants. The obtained simulation results confirm that the change of the control algorithm allows the control objectives to be achieved at lower costs and in less time.

关键词： model-based design parallel design programmable logic controller control system design simulation

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Upgradation in SCADA and PLC of existing LN₂ control system for SST-1

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FUSION ENGINEERING AND DESIGN 2016年 112卷 883-887页

作者： Panchal, Pradip Mahesuria, Gaurang Panchal, Rohit Patel, Rakesh Sonara, Dashrath Pitroda, Dipen Nimavat, Hiren Tanna, Vipul Pradhan, Subrata Inst Plasma Res Bhat 382428 Gandhinagar India

Helium Refrigerator/Liquefier system of Steady State Superconducting Tokamak (SST-1) incorporates Liquid Nitrogen (LN2) pre-cooling system. LN2 is used for 80K thermal shields of SST-1, current feeder system and integrated flow distribution and control system. The LN2 management system is distributed system and requires automatic control. Initially LN2 control system had Citect based Supervisory Control and Data Acquisition (SCADA) and Koyo make programmable logic controller (PLC). With the passage of time and due to unavailability of their hardware, it is being obsoleted. So, the requirements of new PLC and SCADA systems have been envisaged to make uninterruptable operation of SST-1 cryogenic system. Therefore, Wonderware SCADA and Schneider Electric make PLC is programmed to replace Citect SCADA and Koyo PLC. New control features have been added in upgraded control system for better management of LN2 system. This upgradation of SCADA and PLC is completed, tested successfully and in operation. Operational performance highlights of the new upgraded system are presented in this paper. (C) 2016 Elsevier B.V. All rights reserved.

关键词： programmable logic controller Supervisory control and data acquisition system Cryogenics SST-1

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Automatic Sorting of Object by their Colour and Dimension with Speed or Process Control of Induction Motor

Automatic Sorting of Object by their Colour and Dimension wi...

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IEEE International Conference on Circuit ,Power and Computing Technologies (ICCPCT)

作者： Singh, Amit Kumar Ali, Mohd Shadman Rashid BITS EDU CAMPUS Vadodara India

ISBN: (纸本)9781509049677

In today's world of technology and due to speed running industries, the production rate has increased tremendously. Generally, manufacturing industries keep manufacturing same models with little variation in height, colour, weight, shape. And here sorting plays an important role. In such cases industries can't bare human errors for sorting these products. Thus it become necessary to develop Low Cost Automation (LCA) for sorting these products in accurate manner. Industrial automation mainly focuses on developing automations having low cost, low maintenance, long durability and to make systems user friendly as possible. Finally, here we have developed a LCA system for sorting the light weight objects on the basis of height variation using DC geared motors which is controlled by programmable logic controller (PLC) Variable Frequency Drive (VFD) and the conveyor in the system passes the object in front of sensors and thus sorting logic is decided.

关键词： Automation programmable logic controller Low Cost Automation Manufacturing Sorting Colour Sensing

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Speed Control of A DC Motor Using PLC and PIC Microcontroller

Speed Control of A DC Motor Using PLC and PIC Microcontrolle...

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IEEE India Council International Conference

作者： Upasana Sarma P. K. Bordoloi Instrumentation and Control Engineering Department of A.E.I GIMT-G Department of A.E.I GIMT-G

ISBN: (纸本)9781538643198

A programmable logic controller (PLC) is a specialized computer like device used in industrial process control, replacing banks of electromagnetic relays. Here, the speed of a Permanent Magnet Direct Current (PMDC) motor is controlled under load condition by a PID controller simulated in the PLC Platform using the Siemens step S7 software. The PLC used is Siemens CPU224XPsi. The reason behind the PID to be implemented in the PLC program is for the system to have a better response and less error. The loading on the PMDC motor is through eddy current braking. As the loading on the motor cannot be quantified, observations were made for specific loading positions. The performance of the motor was examined under three conditions- (i) Motor without feedback and without controller, (ii) Motor with feedback without controller and (iii) Motor with feedback and controller. The performance of a PMDC motor was also studied through actual hardware implementation. Here a Peripheral Interface controller (PIC) Microcontroller is used to integrate a number of functions like optical method of measurement and display of speed of the motor, feedback and implementation of the PID controller. The transistor-based motor drive is activated by variable Pulse Width Modulation (PWM) output from the microcontroller.

关键词： PMDC Motor programmable logic controller PID controller DC Drive PIC Microcontroller Ladder Programming PWM

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OPC-UA Communication Framework for PLC-based Industrial IoT Applications: Poster Abstract 17

OPC-UA Communication Framework for PLC-based Industrial IoT ...

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Proceedings of the Second International Conference on Internet-of-Things Design and Implementation

作者： Woonggy Kim Minyoung Sung University of Seoul Dongdaemun Seoul

ISBN: (纸本)9781450349666

programmable logic controllers (PLCs) are specialized computing systems for the control and monitoring of distributed industrial devices. Aiming for a highly connected industrial Internet-of-Things (IoT) ecosystem, PLCopen OPC Unified Architecture (UA) specification has been released. This paper presents the implementation and evaluation of a PLCopen OPC-UA software component for industrial control systems. A preliminary evaluation of the developed software has been conducted to analyze the performance of OPC-UA client FBs.

关键词： programmable logic controller Industrial IoT PLCopen OPC Unified Architecture

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Automation Heating and Pumping for Water Using Zelio PLC

Automation Heating and Pumping for Water Using Zelio PLC

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International Symposium on Advanced Topics in Electrical Engineering

作者： Corina M. Dinis Gabriel N. Popa Angela Iagar Department of Electrical Engineering and Industrial Informatics Politehnica University Timisoara

ISBN: (纸本)9781509051618

The paper proposes an automation heating and pumping system for water, using Zelio PLC, for a cloakroom from a facility plant. PLC control installation replaces a classical control installation, less reliable, with contacts and relays. For control of automation heating and pumping system for water using a PLC Zelio SR3B261BD, 24V DC type, and one extension module connected to PLC, SR3XT141BD, 24V DC type. The program was developed in function block diagram. Using PLC's controls the installation has been simplified considerably, and troubleshoots installation are much easier.

关键词： programmable logic controller Control Function block diagram Pump Level sensors

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Research on the Application of Interactive Teaching Method in PLC Teaching

Research on the Application of Interactive Teaching Method i...

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2017 4th International Conference on Education Reform and Management Innovation (ERMI 2017)

作者： Bo Li Yudong Wang Yuming Sun School of Automation Engineering Northeast Electric Power University School of Arts Northeast Electric Power University

The whole process of programmable logic controller（PLC） teaching activities involves many factors,such as curriculum design,teaching material selection,training equipment investment,theory and practice teaching and so *** teaching effect depends on the resultant forces of these *** optimization among the elements of teaching,which are interrelated,mutual restriction and interaction,is the essential condition for the best teaching *** an important teaching mode to cultivate students’ innovative ability,interactive teaching can highlight the dominant position of students when the method is applied to the teaching process of *** this way,the teachers can stimulate students’ interest in learning and improve students’ comprehensive *** application of interactive teaching method in PLC teaching is of great significance.

关键词： programmable logic controller Interactive teaching method Innovation ability

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Position Control of Single Stage Dual Range Positioning System 14

Position Control of Single Stage Dual Range Positioning Syst...

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14th IEEE Student Conference on Research and Development (SCOReD)

作者： Niranjan, Prabha Sairam, K. V. S. S. S. S. Karinka, Shashikantha NMAM Inst Technol Dept E&C Engn Nitte 574110 Karnataka India NMAM Inst Technol Dept Mech Engn Nitte 574110 Karnataka India

ISBN: (纸本)9781509029488

High speed machines with high positioning accuracy have become very important in order to achieve high productivity gains. The system that is capable of achieving both coarse and fine positioning has a wide range of applications in the field of precision engineering. This paper presents a novel method for position control of single stage dual range actuation system. In the developed system both coarse and fine positioning is achieved using ball screw actuator and a gearing mechanism. The friction in the ball screw actuator is identified using Tustin and LuGre models. Position control of the developed system is programmed using programmable logic controller.

关键词： Ball screw actuator positioning MEMS servo motor programmable logic controller

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