Yongcheng Coal and Electric Power Holding Group Corporation Limited

针对煤矿电网电能质量低的问题,提出一种电流谐波补偿装置,即三电平四桥臂有源滤波器,在传统两电平四桥臂空间矢量调制算法基础上,采用将复杂三电平四桥臂空间矢量控制问题简化分解成基准电平状态选择和两电平四桥臂空间矢量控制2个部分进行设计的方法。针对煤炭电网中需要对指定次数谐波电流补偿的情况,研究了基于分频控制思想的有源滤波器控制策略;并通过仿真和试验进行了验证,以五次谐波为例,经过三电平四桥臂有源滤波器进行补偿后,五次谐波含量下降约70%,证明了三电平四桥臂滤波器在矿井谐波补偿方面的可行性和优越性。

According to a low electric power quality problem existed in coal mine, a three-level and four bridge-arms power filter of current harmonic compensation device was provided.Based on a conventional two-level and four bridge-arms space vector modulation algorithm, the complicated three-level space vector control was s implified to two parts of a reference level state selection and a two-level and four bridge-arms space vector control for a design method.According to the given number harmonic current compensation condition required in the coal mine grid, a control strategy of an active power filter was studied based on the divided frequency control i dea.The result was conducted with the simulation and experiment.Based on five harmonic as an example, after the compensation with the three-level and four bridge-ar ms active power filter, the five harmonic contents were reduced by about 70%.The feasibility and advantage of the three-level and four bridge-arms active power filter a pplied to the mine harmonic compensation was approved.