光伏并网集成滤波电抗分裂变压器

Integrated Filtering Reactor Spilt Transformer in Photovoltaic Grid

太阳能光伏发电直接并网系统有多支路性和模块化的特点。将LC滤波器的空心电抗器作为分裂变压器的一个独立绕组以特殊的绕组布置方式集成于分裂变压器中,以达到减少光伏发电并网系统支路个数、精简电力设备数量、减小设备占地面积的目的。本文详细介绍了集成滤波电抗分裂变压器的工作原理,研制出一台1250 k V·A/10.5 k V变压器实物,搭建了1 MW光伏发电并网系统模型。通过实测数据和仿真分析分别论证了非正交解耦理论的正确性和方案的合理性。

Solar photovoltaic grid-connected system has characteristics of multiple branches and modularization. The air-core reactors of LC filters are integrated as a special winding in the spilt transformer to achieve the goal of reducing the number of system branches and electric equipment, as well as decreasing the cover area of the equipment. In this paper, the working principle of an integrated filtering reactor spilt transformer was introduced in detail, and a 1 250 kV. A/10.5 kV prototype was developed. Moreover, a simulation model of 1 MW photovohaie grid-connected system was set up. The experimental data and simulation analysis proved the correctness of non-orthogonal deeoupling theory and the rationality of the proposed schema.