格兰孚特Grundfort有源电力滤波器有模块式、壁挂式和整柜。单柜容量可达到600A，广泛的应用到工业、油气化工、数据中心、公商建等各领域。滤波装置均以并联的方式接入电网，实时检测补偿对象的电压和电流，经指令电流运算单元计算，采用宽频脉冲调制信号变换技术驱动IGBT模块向电网输入与电网谐波电流相位相反、大小相等的电流，两种谐波电流正好相互抵消，从而达到滤除谐波、动态补偿无功的功能，得到期望的电源电流。
IEEE519谐波抑制规范
IEEE-519 Harmonic standard This article is quoted from the harmonic standard "IEEE Std—2014 Recommended Practices and Requirements for Harmonic Control of Power Systems" revised in 2014 by the Institute of Power Electronics Engineers. If there are copyright issues, please contact to delete. The United States IEEE Std. 519-2014 on the harmonic standards of power grids is a relatively authoritative standard in the world, produced by the United States IEEE Power and Energy Society, it is used as a reference standard by many countries and regions around the world. Current distortion limits for systems rated 120 V through 69 kV The limits in this subclause apply to users connected to systems where the rated voltage at the PCC is 120 V to 69 kV. At the PCC, users should limit their harmonic currents as follows。
--TDD (total demand distortion): The ratio of the root mean square of the harmonic content, considering harmonic components up to the 50th order and specifically excluding interharmonics, expressed as a percent of the maximum demand current. Harmonic components of order greater than 50 may be included when necessary.
--THD (total harmonic distortion): The ratio of the root mean square of the harmonic content, considering harmonic components up to the 50th order and specifically excluding interharmonics, expressed as a percent of the fundamental. Harmonic components of order greater than 50 may be included when necessary。
产品特点 Product Features
-高稳定性——365天24小时不停机
-高可靠性——德国品质，服务全球
-高经济性——无级变速风机设计，整机效率最高
-高便捷性——模块化设计，便于安装及维修
技术特性 Technical Parameters
-每台设备上配备了高分辨率的LCD液晶显示触摸屏，可以实时监测各项运行数据，同时也可以在线更改控制参数
-可同时补偿2-61次谐波，补偿后电流总畸变率小于5%，也可以根据客户的需求选择其中特定次谐波进行补偿
-可实现谐波治理、无功补偿、三相不平衡电流调节三种功能任意组合
-采用全数字控制，10ms全响应，谐波电流检测算法基于时域变换的TTA算法，快速分离每一次谐波电流瞬时值
-德国原装进口IGBT模块，美国控制芯片，三电平拓扑结构
-美国的TI的双端高速输入12位A/D数据转换芯片，使信号采样更可靠
-采用风道独立、分层散热的结构设计，使散热性能更优
-各种容量模块随意组合，灵活多变
-风机可独立进行拆装，更换简易便捷，增强散热可靠性
电流谐波总畸变率对照表 THDi selection table 
