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太阳因素：监测光伏系统

现代光伏系统由两个基本组件构成：一个是太阳能模块组成的光伏场，用于将入射太阳能转换成电能；另一个是逆变器系统，用于转换太阳能模块的直流电并馈入交流电网。通常使用中央逆变器实现大型系统。

这些大型逆变器的功率范围约为 500 kW，可模块化升级至 40-50 MW。几年前，这些光伏场还在提供 1000 V 的系统电压和数百安培的电流，如今主要产生 1500 V 的电压。因此相应的逆变器必须有 1500 V 以上的最大输入电压。

利用专用隔离放大器经济且安全地监测光伏系统

保护人员和系统

太阳能供应商面临的挑战是确保系统高效运行，并尽可能实现最大发电量。理想情况是在不影响电气安全的前提下，以极少甚至不用额外费用就能提高效率。在直流侧测量电流和电压，以确定故障并控制功率匹配。上述系统电压都需要适当隔离测量系统，以保护操作人员以及控制和评估系统。

因此，通过高度电气隔离的下游隔离放大器进行测量。在 1000 V 系统中需要根据 DIN EN 61140 安全隔离 1000 V AC/DC。

如果系统电压增至 1500 V，对安全隔离的要求也会相应提高。通过能保证 100% 安全裕度的双重隔离实现安全隔离。

可靠隔离电压高达 1800 V

Knick P41000（电流测量）和 P42000（电压测量）系列隔离放大器可根据 EN 61140 建立高达 1100 V 的安全隔离（过电压类别 OV III / 污染等级 PD 2）。P41100/P42100 型号能实现高达 1800 V AC/DC (OV III 和 PD 2) 的安全隔离。这些隔离放大器有助于构建确保符合相关安全标准的光伏系统。Knick 产品工作可靠，故障率 (MTBF) 为 96 年。

投资回报

  • 基于隔离放大器集中安装在逆变器中的电流和电压测量技术不仅能提高效率，还可节约成本，因为无需进行分散测量。
  • 隔离放大器的集中布置简化了系统设计，成本优势明显。
  • 精确测量总电流可以及早发现有缺陷的系统组件，从而避免产量损失，并提高太阳能系统的安全性和可靠性。
  • 电气隔离电压高达 1000 V 或 1800 V AC/DC，运行安全性高
  • 多达 16 个输入和输出范围的校准切换，灵活性高，并最大限度地降低了仓储成本。

相关产品

P41000 High Voltage Transducer | Input up to ±100 V | High isolation up to 3600 V
P41000 High Voltage Transducer | Input up to ±100 V | High isolation up to 3600 V
商品编码:

P41000

P42000 High Voltage Transducer | Calibrated range selection
P42000 High Voltage Transducer | Calibrated range selection
商品编码:

P42000

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