For a standalone PV （photovoltaic） power generation system, the author previously proposed a new MPPT （maximum power point tracking） control method in which the I-V characteristics are scanned with a detection int...For a standalone PV （photovoltaic） power generation system, the author previously proposed a new MPPT （maximum power point tracking） control method in which the I-V characteristics are scanned with a detection interval control that operates at specified intervals and monitors the maximum power point. The author has obtained satisfactory results using this new MPPT control method. This paper investigates the application of the new MPPT control method for a PCS （power conditioning system） in a grid-connected type PV power generation system. The experimental results clearly demonstrate that the developed PCS offers outstanding effectiveness in tracking the maximum power point in partially shaded environments.展开更多
This paper proposes a new peak current control switching(PCCS)method for single-phase inverter in photovoltaic(PV)generation system.This method minimizes the difference between a peak current and the current command w...This paper proposes a new peak current control switching(PCCS)method for single-phase inverter in photovoltaic(PV)generation system.This method minimizes the difference between a peak current and the current command with a constant switching frequency.In this paper,the principle and the simulation results of the proposed method are described.In this paper,the principle and the simulated transient characteristics of this PCCS method are described.From the results,it is clarified that the proposed switching method is effective.展开更多
广西是中国的重要产糖地,以甘蔗糖为主,广西的糖厂大部分仍然采用一步法制糖且生产自动化程度比较低。国外高质量精制糖生产大多数采用二步法,且自动化程度非常高。目前广西部分糖企探索对制糖工艺进行改造,采用二步法制糖同时提高制糖...广西是中国的重要产糖地,以甘蔗糖为主,广西的糖厂大部分仍然采用一步法制糖且生产自动化程度比较低。国外高质量精制糖生产大多数采用二步法,且自动化程度非常高。目前广西部分糖企探索对制糖工艺进行改造,采用二步法制糖同时提高制糖产线的自动化程度,降本增效,因此,溶糖自动化是二步法制糖中一项重要且先进的自动化技术应用。以广西某糖厂二步法改造项目中原糖回溶车间溶糖自动化控制系统为对象,研究基于西门子PCS7的溶糖自动化生产控制系统设计与实现。PCS7(Process Control System 7)是西门子公司开发的一套典型的现代分布式控制系统(DCS),集成了先进的硬件和软件技术,专门用于工业自动化和过程控制。将西门子PCS7应用到制糖控制中,有利于提高制糖控制系统的自动化、智能化、集成化程度,提高生产效率。该项目已经顺利投产,产能达到设计要求,各个工艺工段重要过程指标均达到或优于生产要求,自动化程度高,系统运行稳定可靠。实际项目应用表明,西门子PCS7在溶糖自动化应用安全可靠,利用PCS7可以有效提高原糖回溶车间自动化控制系统的自动化、智能化、集成化。展开更多
文摘For a standalone PV （photovoltaic） power generation system, the author previously proposed a new MPPT （maximum power point tracking） control method in which the I-V characteristics are scanned with a detection interval control that operates at specified intervals and monitors the maximum power point. The author has obtained satisfactory results using this new MPPT control method. This paper investigates the application of the new MPPT control method for a PCS （power conditioning system） in a grid-connected type PV power generation system. The experimental results clearly demonstrate that the developed PCS offers outstanding effectiveness in tracking the maximum power point in partially shaded environments.
文摘This paper proposes a new peak current control switching(PCCS)method for single-phase inverter in photovoltaic(PV)generation system.This method minimizes the difference between a peak current and the current command with a constant switching frequency.In this paper,the principle and the simulation results of the proposed method are described.In this paper,the principle and the simulated transient characteristics of this PCCS method are described.From the results,it is clarified that the proposed switching method is effective.
文摘广西是中国的重要产糖地,以甘蔗糖为主,广西的糖厂大部分仍然采用一步法制糖且生产自动化程度比较低。国外高质量精制糖生产大多数采用二步法,且自动化程度非常高。目前广西部分糖企探索对制糖工艺进行改造,采用二步法制糖同时提高制糖产线的自动化程度,降本增效,因此,溶糖自动化是二步法制糖中一项重要且先进的自动化技术应用。以广西某糖厂二步法改造项目中原糖回溶车间溶糖自动化控制系统为对象,研究基于西门子PCS7的溶糖自动化生产控制系统设计与实现。PCS7(Process Control System 7)是西门子公司开发的一套典型的现代分布式控制系统(DCS),集成了先进的硬件和软件技术,专门用于工业自动化和过程控制。将西门子PCS7应用到制糖控制中,有利于提高制糖控制系统的自动化、智能化、集成化程度,提高生产效率。该项目已经顺利投产,产能达到设计要求,各个工艺工段重要过程指标均达到或优于生产要求,自动化程度高,系统运行稳定可靠。实际项目应用表明,西门子PCS7在溶糖自动化应用安全可靠,利用PCS7可以有效提高原糖回溶车间自动化控制系统的自动化、智能化、集成化。
