This article presents a new circuit topology of a high-voltage step-up boost DC-DC converter for photovoltaic power systems. The converter boosts the low-output voltage of the solar cell to the required voltage for the load. The proposed circuit has various advantages compared to the conventional boost converters, namely a higher boost rate with low duty cycle, lower voltage stress on components, and higher efficiency. The equations of a dual-boost converter are analyzed, highlighting the advantages of the new DC/DC converter circuit topology. The operation principle is explained using the operating intervals equivalent circuits and operation waveforms. Then, mathematical and theoretical analyses of continuous and discontinuous conduction modes of the converter are presented. Losses and thus efficiency of the proposed converter are calculated using MATLAB (The MathWorks, Natick, Massachusetts, USA). Calculations are used to compare the efficiency of the proposed topology with others available in the literature regarding the benefits of decreasing cost and complexity. A photovoltaic system simulation model is developed using PSIM (Powersim Inc., Woburn, Massachusetts, USA) to validate the proposed converter. The proposed high voltage gain boost converter has been implemented for a 100-W load and tested to verify the principle of operation.

Supply chain is a network of suppliers, manufacturers, distributors, and retailers that act together to control, manage, and improve the overall supply chain performance. The most important and critical part of decision making is identifying the different sides of supply chain’s performance. Evaluating the performance of the whole supply chain is a complex task, due to the complexity inherent in the structure and operations of the supply chain. This study presents a suggestion for a comprehensive system to evaluate the performance of the supply chain in eight dimensions (i.e., financial, customer, internal operations, learning and growth, people, environmental, and political perspectives). The proposed performance evaluation system (PES) suggests a procedural framework to explain the application methodology of that PES. Moreover, the study offers a simulation modelling methodology for modelling the complex system of supply chain. It also provides a real world case study to clarify the applicability of the proposed PES.

Supply chain is a network of suppliers, manufacturers, distributors, and retailers that act together to control, manage, and improve the overall supply chain performance. The most important and critical part of decision making is identifying the different sides of supply chain’s performance. Evaluating the performance of the whole supply chain is a complex task, due to the complexity inherent in the structure and operations of the supply chain. This study presents a suggestion for a comprehensive system to evaluate the performance of the supply chain in eight dimensions (i.e., financial, customer, internal operations, learning and growth, people, environmental, and political perspectives). The proposed performance evaluation system (PES) suggests a procedural framework to explain the application methodology of that PES. Moreover, the study offers a simulation modelling methodology for modelling the complex system of supply chain. It also provides a real world case study to clarify the applicability of the proposed PES.

Supply chain is a network of suppliers, manufacturers, distributors, and retailers that act together to control, manage, and improve the overall supply chain performance. The most important and critical part of decision making is identifying the different sides of supply chain’s performance. Evaluating the performance of the whole supply chain is a complex task, due to the complexity inherent in the structure and operations of the supply chain. This study presents a suggestion for a comprehensive system to evaluate the performance of the supply chain in eight dimensions (i.e., financial, customer, internal operations, learning and growth, people, environmental, and political perspectives). The proposed performance evaluation system (PES) suggests a procedural framework to explain the application methodology of that PES. Moreover, the study offers a simulation modelling methodology for modelling the complex system of supply chain. It also provides a real world case study to clarify the applicability of the proposed PES.