This paper presents the study and application of the electronic device anti-interference techniques underhigh voltage and/or heavy current electro-magnetic circumstance in power system.[
Battery impedance plays a crucial role in battery state monitoring.However,traditional impedance measurements rely on specialized equipment such as electrochemical workstations,incurring high costs and lacking real-ti...Battery impedance plays a crucial role in battery state monitoring.However,traditional impedance measurements rely on specialized equipment such as electrochemical workstations,incurring high costs and lacking real-time capabilities.Hence,the concept of online,or dynamic impedance for batteries has been introduced.This approach involves applying voltage or current perturbations to the battery using the original circuit topology,measuring current and voltage,and calculating impedance.It significantly enhances the real-time capabilities and practical value of battery impedance measurements.This paper reviews the principles of online battery impedance measurement,enumerates,summarizes,and compares methods for distributed and centralized battery impedance measurement.In addition to outlining the research on conventional generation of battery impedance perturbation signals via DC-DC converters,this paper features an overview of online battery impedance measurement using DC-AC converters,and also analyzes the impacts of battery impedance measurement on the system and the solutions.Finally,the perturbation signal types,impedance calculation and verification methods are briefly introduced and discussed.For different perturbations,impedance calculation should be carried out by corresponding methods.With the scalability of impedance data acquisition and the integration of rapidly advancing intelligent algorithms,impedance technology holds vast prospects in the field of battery state monitoring.展开更多
The AC electric arc furnace(EAF)is becoming a core apparatus of the modern steel industry.Nevertheless,it used to be a major threat of power quality in the traditional power supply system.In this paper,a flexible powe...The AC electric arc furnace(EAF)is becoming a core apparatus of the modern steel industry.Nevertheless,it used to be a major threat of power quality in the traditional power supply system.In this paper,a flexible power supply system of the AC EAF is proposed,which is expected to completely alter its inherent cognition of impact load in the power grid.The basics of the power supply for EAF are first reviewed and the novel techniques to enhance the operation flexibility of EAF are introduced.The power circuit and the control structure are then presented,followed by the detailed strategies of various operations fully considering the features of EAF.A large disturbance stability criterion based on the mixed potential theory is also established for the practical application.Both electromagnetic transient simulations using PSCAD and benefit analyses verify the feasibility of the proposed system.展开更多
This paper investigates the operation and analysis of the photovoltaic water pumping system in detail. Power electronic controllers were designed and developed for the water pumping system using a boost converter alon...This paper investigates the operation and analysis of the photovoltaic water pumping system in detail. Power electronic controllers were designed and developed for the water pumping system using a boost converter along with an inverter followed by an induction motor pump set. The proposed system could be employed in agricultural irrigation under any operating condition of varying natures of solar irradiances and temperatures. The configuration and implementation of the system were described in detail. Further, the detailed method of analysis and simulation characteristics of such PV water pumping system was also presented. With the concern of shortage of fossil fuel, global warming and energy security, the proposed PV based water pumping significant demand of electricity agricultural sector. system can meet the and serve for the展开更多
文摘This paper presents the study and application of the electronic device anti-interference techniques underhigh voltage and/or heavy current electro-magnetic circumstance in power system.[
文摘Battery impedance plays a crucial role in battery state monitoring.However,traditional impedance measurements rely on specialized equipment such as electrochemical workstations,incurring high costs and lacking real-time capabilities.Hence,the concept of online,or dynamic impedance for batteries has been introduced.This approach involves applying voltage or current perturbations to the battery using the original circuit topology,measuring current and voltage,and calculating impedance.It significantly enhances the real-time capabilities and practical value of battery impedance measurements.This paper reviews the principles of online battery impedance measurement,enumerates,summarizes,and compares methods for distributed and centralized battery impedance measurement.In addition to outlining the research on conventional generation of battery impedance perturbation signals via DC-DC converters,this paper features an overview of online battery impedance measurement using DC-AC converters,and also analyzes the impacts of battery impedance measurement on the system and the solutions.Finally,the perturbation signal types,impedance calculation and verification methods are briefly introduced and discussed.For different perturbations,impedance calculation should be carried out by corresponding methods.With the scalability of impedance data acquisition and the integration of rapidly advancing intelligent algorithms,impedance technology holds vast prospects in the field of battery state monitoring.
基金supported in part by the National Natural Science Foundation of China (No.U1866601)。
文摘The AC electric arc furnace(EAF)is becoming a core apparatus of the modern steel industry.Nevertheless,it used to be a major threat of power quality in the traditional power supply system.In this paper,a flexible power supply system of the AC EAF is proposed,which is expected to completely alter its inherent cognition of impact load in the power grid.The basics of the power supply for EAF are first reviewed and the novel techniques to enhance the operation flexibility of EAF are introduced.The power circuit and the control structure are then presented,followed by the detailed strategies of various operations fully considering the features of EAF.A large disturbance stability criterion based on the mixed potential theory is also established for the practical application.Both electromagnetic transient simulations using PSCAD and benefit analyses verify the feasibility of the proposed system.
文摘This paper investigates the operation and analysis of the photovoltaic water pumping system in detail. Power electronic controllers were designed and developed for the water pumping system using a boost converter along with an inverter followed by an induction motor pump set. The proposed system could be employed in agricultural irrigation under any operating condition of varying natures of solar irradiances and temperatures. The configuration and implementation of the system were described in detail. Further, the detailed method of analysis and simulation characteristics of such PV water pumping system was also presented. With the concern of shortage of fossil fuel, global warming and energy security, the proposed PV based water pumping significant demand of electricity agricultural sector. system can meet the and serve for the
