The thesis is directed by the idea of oriented-object. Considering the basic functions that NC system Ladder Diagram editor should provide,and through theoretical research and practice,the thesis developed a set of NC...The thesis is directed by the idea of oriented-object. Considering the basic functions that NC system Ladder Diagram editor should provide,and through theoretical research and practice,the thesis developed a set of NC system Ladder Diagram editor which can form a Ladder Diagram editor based on vector plotting,intelligently compiling,simulation. This system uses the ladder diagram symbol to express operational order and use the chart symbol series-parallel connection and the position order to express the logical relations between the operational orders,divide the ladder diagram into four parts: the stave,the line,the row and the part,uses the standard order vessel list vessel of the standard template stack (STL) to save the data which involved in the design process. This system can write PLC program by ladder diagram language and is easy to use. The compilation and simulation for PLC diagram have been achieved. It greatly improves the work-efficiency.展开更多
increasing penetration of renewable energy sources with a wide range of operating conditions causing power system uncertainties, conventional controllers are incapable of providing proper performance to keep the syste...increasing penetration of renewable energy sources with a wide range of operating conditions causing power system uncertainties, conventional controllers are incapable of providing proper performance to keep the system stable. However, controllable or dispatchable loads such as electric vehicles （EVs） and heat pumps （HPs） can be utilized for supplementary frequency control. This paper shows the ability of plug-in hybrid EVs, HPs, and batteries （BTs） to contribute in the frequency control of an isolated power system. Moreover, we propose a new online intelligent approach by using a coefficient diagram method （CDM） to enhance the system performance and robustness against uncertainties. The performance of the proposed intelligent CDM control has been compared with the proportional-integral （PI） controller and the superiority of the proposed scheme has been verified in Matiab/Simulink programs.展开更多
文摘The thesis is directed by the idea of oriented-object. Considering the basic functions that NC system Ladder Diagram editor should provide,and through theoretical research and practice,the thesis developed a set of NC system Ladder Diagram editor which can form a Ladder Diagram editor based on vector plotting,intelligently compiling,simulation. This system uses the ladder diagram symbol to express operational order and use the chart symbol series-parallel connection and the position order to express the logical relations between the operational orders,divide the ladder diagram into four parts: the stave,the line,the row and the part,uses the standard order vessel list vessel of the standard template stack (STL) to save the data which involved in the design process. This system can write PLC program by ladder diagram language and is easy to use. The compilation and simulation for PLC diagram have been achieved. It greatly improves the work-efficiency.
文摘increasing penetration of renewable energy sources with a wide range of operating conditions causing power system uncertainties, conventional controllers are incapable of providing proper performance to keep the system stable. However, controllable or dispatchable loads such as electric vehicles （EVs） and heat pumps （HPs） can be utilized for supplementary frequency control. This paper shows the ability of plug-in hybrid EVs, HPs, and batteries （BTs） to contribute in the frequency control of an isolated power system. Moreover, we propose a new online intelligent approach by using a coefficient diagram method （CDM） to enhance the system performance and robustness against uncertainties. The performance of the proposed intelligent CDM control has been compared with the proportional-integral （PI） controller and the superiority of the proposed scheme has been verified in Matiab/Simulink programs.
文摘传统的电气自动化控制系统存在响应时间慢、维修率高、布线复杂等问题。深入分析可编程逻辑控制器(Programmable Logic Controller,PLC)技术在电气自动化工程中的应用,特别关注其在数学模型、自动化加工控制以及基于比例-积分-微分(Proportional Integral Derivative,PID)算法的包装过程中的应用,旨在提高电气自动化系统的效率和精度,降低成本和维护难度,实现高效和经济的生产目标。
