权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Development of Photovoltaic Interactive Inverter Using Immittance Converter in High-Frequency Link

高频环节导抗变换器光伏互动逆变器的研制

基本信息

批准号：
09650333
负责人：
IRIE Hisaichi
金额：
$ 2.3万
依托单位：
Osaka Electro-Communication University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1999
项目状态：
已结题

项目摘要

Newly developed photovoltaic utility interactive inverter is 3kW rated power. In the inverter, there is a transformer integrated T-LCL type immittance converter newly designed in insulated high frequency link which worked at 19kHz. At 60Hz, a sinusoidal current of 3% distortion factor is obtained without the feed back control, and is little affected by the amplitude and the wave form distortion of the utility voltage. Waveform and amplitude of the sinusoidal current don't change, when the utility voltage changes stepwise, and the transient oscillation disappears in 0.1 millisecond. The overall efficiency of the photovoltaic interactive inverter is over 90%.Basic characteristics such as frequency characteristics, voltage-current transfer characteristics, efficiency characteristics were clarified on resonant immittance converter of 5 types. The immittance converter of all types has maximum efficiency when the load impedance is equal to the characteristic impedance. The maximum efficiency is 98%, if the Q of the reactor is 100 in the LCL type immittance converter. In experiments, the 98.6% maximum efficiency has been obtained using the LCL type immittance converter, and 99.4% maximum efficiency has been obtained using the hybrid type immittance converter. It became clear that the deviation of the resonant frequency and source frequency could be permitted ± 5%.The power receiving end in the carrier supplied power by a Non-Contact Energy Transfer System is one of the useful application of the immittance converter. In the system, the high frequency constant current at the receiving end is converted into a constant voltage by the immittance converter, then it is rectified, and a DC constant voltage is obtained. The rectifying technology of the output of the immittance converter is common to the photovoltaic utility interactive inverter.

新开发的光伏公用事业交互式逆变器额定功率为3kW。在逆变器中有一个新设计的绝缘高频环节的变压器集成T-LCL型导纳变流器，工作频率为19 kHz。在频率为60 Hz时，无反馈控制的正弦电流畸变率为3%，且几乎不受电源电压幅值和波形失真的影响。电压阶跃变化时，正弦电流的波形和幅值不变，暂态振荡在0.1毫秒内消失。光伏互动式逆变器的整体效率在90%以上，并对5种类型的谐振导纳逆变器的频率特性、电压-电流传递特性、效率特性等基本特性进行了阐述。当负载阻抗等于特性阻抗时，所有类型的导纳转换器的效率都最高。在LCL型电抗器中，当电抗器的Q为100时，效率最高可达98%。在实验中，LCL型导纳变流器获得了98.6%的最大效率，混合型导纳变流器获得了99.4%的最大效率。结果表明，谐振频率和电源频率的偏差可以允许为±5%。非接触能量传输系统在载波供电中的功率接收端是导纳转换器的有用应用之一。在该系统中，接收端的高频恒流通过导纳变流器转换为恒压，然后进行整流，得到直流恒压。导纳逆变器输出的整流技术是光伏并网逆变器的共性。