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SMR-3910B Anti-Islanding Protection Device
- Description
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1. Overview
Grid connection point of photovoltaic power station: For photovoltaic power stations with booster stations, it refers to the high-voltage side bus or connection point of the booster station; for photovoltaic power stations without booster stations, it refers to the output aggregation point of the photovoltaic power station.
Island phenomenon: When the grid loses pressure, the photovoltaic power station still maintains the state of supplying power to a certain part of the line in the pressure-lost grid. For small photovoltaic power stations, they should have the ability to quickly monitor the island and immediately disconnect from the grid. Generally, photovoltaic inverters are equipped with anti-islanding protection functions, but for the safe, stable, and reliable operation of the power system, anti-islanding protection devices can be installed at the grid connection point as another set of protective equipment, which can quickly cut off distributed island power sources.
2. Product Features
1) The SMR-3910B device can be centrally grouped or installed locally and dispersed on the switch cabinet, with each compartment functioning independently. The devices are only connected through a network, sharing information, making the entire system not only highly flexible but also significantly improving its reliability, where the failure of any device only affects a local component.
2) The device uses a high-performance processor and high-resolution A/D converter, combined with dedicated measurement CTs, ensuring high accuracy of remote measurement.
3) The protection function does not rely on the communication network, and whether the network is down does not affect the normal operation of the protection.
4) The device adopts a fully sealed design, along with carefully designed anti-interference components, greatly improving its vibration resistance and electromagnetic interference resistance.
5) It is designed with a watchdog function, giving the entire system both high measurement accuracy and anti-interference capability.
6) A user-friendly human-machine interface, the device uses a fully Chinese-language large-screen LCD display, with clear Chinese character labels for trip reports, alarm reports, remote signals, remote measurements, and setting values, making it easy for users to use and understand.
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