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RISS 인기검색어
- 검색키워드
- 저자 : Xiaoju Yin (검색결과 3 건)
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- 유료
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The Least Action Solving Method of MPPT for Micro-Inverter in Distributed PV Grid
Xiaoju Yin,Fengge Zhang,Yonggang Jiao,Zhenhe Ju 보안공학연구지원센터 2015 International Journal of Grid and Distributed Comp Vol.8 No.4
The solar radiation conditions and environmental factors on the shadow of the power generation resulted in loss of efficiency. In this paper, a simple structure with interleaved isolation converter according to the characteristics of the hardware circuit is proposed in order to improve the conversion efficiency of photovoltaic grid system. First, the hot spot effect and discretization of solar panels according to the characteristics of the micro-inverter with a lot of promotion is analyzed. The least action recursive method is involved, which has high computing precision, and therefore is more suitable for distributed micro-inverter system. The PC56F8245 chip is chosen to overcome the loss of photovoltaic energy and improve the conversion efficiency. The stability and high accuracy has been proved through the related experiments.
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Xiaoju Yin,Fengge Zhang,Xiuping Wang,Yonggang Jiao,Zhenghe Ju 보안공학연구지원센터 2015 International Journal of Hybrid Information Techno Vol.8 No.10
The combination of ampere-hour method and open-circuit voltage method in the photovoltaic measurement system is studied in this paper. In order to achieve the purpose of online measurement for remaining capacity, the influence of internal battery discharge and temperature on the battery capacity should be considered. The battery capacity decreases by the increasing charging times, and the increasing terminal voltage difference causes the inaccurate measurement of the capacity of battery. In this paper, two experimental measurement methods are employed, which are complementary to each other, to make the system measurement more accurate and extend the life of lead-acid batteries. If the charging process of photovoltaic system is unstable, an optimization of lead-acid battery applications in photovoltaic energy storage system is explored at the same time. Finally, an illustrative example is presented to demonstrate the effectiveness of the proposed measuring method.
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Liu Hao,Yin Xiaoju 대한전기학회 2022 Journal of Electrical Engineering & Technology Vol.17 No.1
This paper mainly studies two-dimensional analytic method to analyze and calculate a short-secondary type slotless permanent magnet linear synchronous motor (SST-SPMLSM) performance. Due to the large air-gap and more magnetic fl ux leakage of electric machine, this paper proposes the groove-by-groove method to analyze the winding equivalent current density. Meanwhile, the volume current density is used to equivalent the permanent magnet magnetization, which is obtained the permanent magnet equivalent current density. According to the electric machine structure, the divided layers model of the SST-SPMLSM is built. Based on the hierarchical analytical model and equivalent current density of the electric machine, the two-dimensional magnetic vector potential of each region in the SST-SPMLSM is derived by the separated variable method. Combined with the boundary conditions of the electric machine, the magnetic fl ux densities of the SST-SPMLSM with diff erent regions are derived. In the meantime, a 30 N SST-SPMLSM is designed. On this basis, the magnetic fl ux density, detent force, and electromagnetic thrust force of the SST-SPMLSM are analyzed and calculated, which of the results are verifi ed by fi nite element method. From the results, it satisfi es the design requirements of the SST-SPMLSM, and verifi es the validity and correctness of analytical method.
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