Bently 81544-01 卡件-I/O单元

卡件 BENTLY NEVADA I/O & RECORD TERMINAL 81544-01 NEW-NO BOX 8154401

卡件 BENTLY NEVADA I/O & RECORD TERMINAL 81544-01 NEW-NO BOX 8154401

卡件 BENTLY NEVADA I/O & RECORD TERMINAL 81544-01 NEW-NO BOX 8154401

什么是光伏组串：

在光伏发电系统中，将若干个光伏组件串联后，形成具有一定直流输出的电路单元，简称组件串或组串。

组串电流检测有几个典型的特点：

1.检测电流的路数一般较多，典型的有8路16路等（汇流箱），逆变器则根据其MPPT设计各有不同。

2.对其检测电流的精度有一定要求，但不做计量或计算需求。更大的意义在于实时监控组件发电的状态。

组串电流检测的应用：

汇流箱

是指用户可以将一定数量、规格相同的光伏电池串联起来，组成一个个光伏串列，然后再将若干个光伏串列并联接入光伏汇流箱，起到汇流和监控的装置。汇流箱是作为组串电流的典型应用代表。

逆变器

    随着分布式电站及商用家庭光伏发电的兴起。尤其是国内，组串式电流传感器作为检测光伏面板的*道监控，发挥着*的作用。

电流检测原件的迭代升级

原理篇

因为需要对光伏面板发出的电流进行实时监控，其关注电流一般在7A~10A的直流电流（双面组件的电流会更大些）。要检测这个档位的直流电方案有很多。有比如电阻，光耦霍尔等检测方案。这里可以讲讲光伏汇流箱里电流检测方案的跟新迭代。

电阻方案：

在低频率小幅值电流测量中，表现出高的精度和较快的响应速度。工业领域中，在不涉及到测量回路与被测电流之间电隔离的场合，分流器是将电流信号转变为电压信号的的低成本方案。

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