产品中心
1771-OD16
特点
?5.6英寸
?256色TFT真彩,320*240像素
?4MB FlashROM,4KB SRAM
?具备数据显示、数据监控、报警、配方等基本功能
?支持多种主流PLC,双口可独立通讯
?画面编辑软件,支持离线和在线模拟,并可实现组态功能
产品规格
电气特征
输入电压
DC22-DC26V
消耗电流
<180mA
允许瞬时停电
小于20ms
耐电压
AC1000V-10mA 1分钟(信号与时间)
产品介绍及用途
风力发电变流器是主流风力发电设备的重要组成部分,也是我国目前风力发电设备中一个还没有国产化规模应用的装置。风力发电变流器分为双馈式变流器和直驱式变流器,目前我公司研发的变流器属于直驱式变流器,这也是风力发电设备的发展方向。
风力发电变流器的主要用途是把变化的风力电能转化成稳定、连续的电能输向电网。
二、产品的主要功能
直驱风力发电变流器的主要功能是接收风电机组控制器的指令,按指令发出相应的有功功率及无功功率,并把有关信息回送到控制器,保证风力发电机组稳定可靠的并网运行。
三、产品的基本工作原理
风力发电变流器的基本工作原理是,风力发电机组发出的不稳定交流电能,经全波整流后,再经过BOOST升压电路,实现AC/DC稳压及升压变换,然后由三电平结构组成的逆变单元转变成电压和频率稳定的三相交流电流,输向电网。逆变单元采用多重化载波移相PWM技术,输出波形近似正弦,谐波含量小,效率高。
四、产品的结构、主电路拓扑及控制性能特点
1、结构
产品采用德国品牌机柜,柜体采用一体化设计。整机结构主要包括功率变换系统和操作控制系统。其中功率变换系统采用积木式结构,由若干个结构和电气性能完全一致的功率模块组成,可互换、易扩展。
2、主电路拓扑
功率变换系统是变流器的核心部分,由多个功率模块并联组成,并且每个功率模块由二极管整流电路、BOOST升压电路、滤波电路及逆变电路组成,其中逆变电路采用三电平拓扑结构。
3、控制性能特点
(1)采用优化的载波移相PWM调制算法和多单元并联技术,可实现直流母线电压的恒定控制,实现对发电机的输出电压、有功功率的调节,输出波形近似正弦,具有谐波小,效率高的特点;
(2)各单元均有一套独立的控制系统,并具有完善的保护功能,单元互为冗余,系统可靠性高。
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