DEVEROPMENT OF A RESIDENCIAL USE MULTI-FUNCTION HIGH-EFFICIENCY PHOTO VOLTAIC SYSTEM WITH BATTERY ENERGY STORAGE ABILITY

1.本研究采用自然换相控制策略对高频环节变流器的周波换流级进行输出电压调节，实现了周波换流级的零电流开关（ZCS）操作。另一方面，高频逆变器级采用了所谓的无损耗电容缓冲器，实现了高频逆变器级的零电压开关（ZVS）操作。因此，完全软开关操作的转换器已被取消.研究了高频Transformer漏感和交-交变频级开关臂寄生电容引起的寄生谐振现象。提出了一种利用阻容缓冲电路的对策及其设计方法.在循环换流器级采用MOSFET的情况下，已经指出，其恢复时间相对较慢的寄生二极管使得开关特性值得。提出了一种避免这种影响的开关臂拓扑结构.本文提出了一种非对称相角控制方案，用于交-交变频级的输出电压控制。在输出功率为1 kW时，总功率转换效率提高了3%.利用瞬时电流控制能力实现交流系统侧的有源滤波功能。在电子工程系大楼屋顶安装了6.1.5kW输出光伏面板。对面板的基本数据进行了一年的实测.采用DSP作为控制电路，实现了一种具有直流有源滤波功能的单相整流器原型系统。

1. In this research, naturally commutated phase angle control scheme has been used for the output voltage regulation of the cycloconverter stage of HF link converter, and enabled ZCS (zero corrent switching) operation of the cyclconverter stage. On the other hand, so-called loss-less capacitor snubbers has been adopted for the HF inverter stage, and enabled ZVS (zero voltage switching) operation of HF inverter stage. Thus, totally soft-switched operation of the converter has been achieved.2. Undesired parasetic resonance phenomena due to the leakage inductance of the HF transformer and the parasetic capacitance at switching arms of cycloconverter stage has been investigated. A countermeasure using R-C snubber circuit and its design method has been proposed.3. In the case of using MOSFETs for the cycloconverter stage, it has been pointed out that the parasetic diod whose recovery time is relatively slow makes the switching characteristics worth. And a switching arm topology to avoid such effect has been recommended.4. An asymmetrical phase angle control scheme has been applied for the output voltage control of cycloconverter stage. The total power conversion efficiency has been improved by 3% at 1kW output.5. Active filtering function at AC system side has been schieved by means of instan-taneous current control ability.6.1.5kW output photo voltaic pannel has been settled on the roof of the building of the Dept.of Erectronic Eng..Basic data of the pannel has been measured during a year.7. A proto type system of a single-phase rectifier with DC active filtering function has been implemented using DSP for its control circuit.