三相耦合电感单级升压逆变器非隔离光伏并网发电系统

发布时间：2018-03-06 09:16

本文选题：光伏发电系统　切入点：单级逆变器　出处：《电工技术学报》2015年06期 　论文类型：期刊论文

【摘要】：针对耦合电感单级升压逆变器(Coupled Inductor Single-Stage Boost Inverter,CL-SSBI)在非隔离光伏并网发电系统中的应用,提出在线路上进行改进,构成CL-SSBI-D,并采用适当的调制方式,减小漏电流幅值。该CL-SSBI-D拓扑,能够在有效矢量和传统零矢量作用时阻断漏电流的回路;采用相邻矢量脉宽调制(Near-State PWM,NSPWM)方式,去掉传统零矢量,并减小了有效矢量时的共模电压幅值,从而进一步减小了直通零矢量与有效矢量变化瞬间产生的漏电流。本文在理论研究的基础上对采用恒定最大增益(Maximum Constant Boost,MCB)调制方法的CL-SSBI和采用NSPWM调制方法的CL-SSBI-D非隔离并网系统进行了仿真和实验验证,证明采用NSPWM的CL-SSBI-D非隔离并网系统可有效减小漏电流。
[Abstract]:For the coupled inductor single-stage boost inverter (Coupled Inductor Single-Stage Boost Inverter, CL-SSBI) used in non isolated grid connected photovoltaic power system, put forward in line is improved CL-SSBI-D, and using appropriate modulation mode, reduce the leakage current amplitude. The CL-SSBI-D topology, can block the leakage current of the circuit in the traditional and effective vector zero vector; using adjacent vector pulse width modulation (Near-State PWM, NSPWM), get rid of the traditional zero vector, and reduces the common mode voltage amplitude vector, to further reduce the leakage current through the zero vector and vector change generated instantly. On the basis of theoretical research on the constant maximum gain (Maximum Constant Boost, MCB) and CL-SSBI modulation method using NSPWM modulation method of CL-SSBI-D is verified by simulation and experiment of isolation grid system, It is proved that the leakage current can be effectively reduced by the CL-SSBI-D non isolated grid connected system using NSPWM.

【作者单位】：南京航空航天大学雷达成像与微波光子技术教育部重点实验室;南京航空航天大学江苏省新能源发电与电能变换重点实验室;
【基金】：国家自然科学基金青年资助项目(51407089)
【分类号】：TM464

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