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Talking about the Monitoring Networking Mode of Multiple Inverter Application Cases in Distributed System
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[Abstract]:
Conclusion: Distributed photovoltaics are getting more and more popular, and the general public has more and more understanding of photovoltaic knowledge. As a leader in the inverter industry, Shengnengjie Technology is always at the forefront of technological innovation, and is committed to providing high-reliability, high-priced inverter host solutions and monitoring solutions to the public, contributing to the realization of photovoltaic parity online.
Introduction: In 2017, it can be said that it is the fastest development of distributed PV. The distributed market is more than three times faster than 2016. The corresponding distributed power station monitoring system has also been widely used in photovoltaic power plants. Power plant operation data viewing, equipment remote management, intelligent maintenance and other fields have played an indelible role. In particular, it is worth mentioning that village-level photovoltaic poverty alleviation and industrial and commercial distributed photovoltaic systems account for a large proportion. But what are the monitoring networking solutions for these PV system cases? Which solution is the most cost-effective, and which solution is the most reliable? Below we will get some answers through some comparisons.
GPRS/Wifi/WLAN one-to-one solution:
In this solution, each inverter must be equipped with a communication accessory (GPRS/Wifi/WLAN module). The system configuration schematic is as follows:
2. Collector one-to-many program:
In this scheme, multiple (generally less than 20) inverters are connected in series via RS485, and a data collector module is configured. The system configuration schematic is as follows:
3. Sheng Nengjie efficient and reliable multi-machine integration program:
In this solution, multiple (generally less than 20) inverters are connected in series via RS485, and a communication accessory (GPRS/Wifi/WLAN module) is configured. The system configuration schematic is as follows:
After introducing the above three schemes, we conducted a comparative analysis of the monitoring schemes with a 1MW factory roof distributed power station (using 16Pcs 60kW string inverters, all monitored by GPRS communication, and the annual fee of each GPRS module is the same). The comparison data is visually obvious:
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reliabilityRemarks |
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plan 1 |
16*200RMB |
Inverter host self-powered, IP65 waterproof, high reliability |
The initial investment cost is high, and the annual investment cost is higher. |
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plan 2 |
1*3000RMB |
Must be connected to 220V power supply, data collector protection class IP21 is prone to failure, reliability is not high |
Annual fee is consistent |
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plan 3 |
1*200RMB |
Inverter host self-powered, IP65 waterproof, high reliability |
Through the above data, it is not difficult to find that the multi-machine integration monitoring solution provided by Shengnengjie not only avoids the high hardware cost of the scheme 1, but also reduces the initial investment cost of the power station owner, and avoids the construction difficulty of the scheme 2 and the waterproof defense. Dust troubles greatly improve the reliability of power station monitoring, and can be widely applied to any distributed photovoltaic power station, which can be described as a monitoring tool for distributed photovoltaic power plants.
Conclusion: Distributed photovoltaics are getting more and more popular, and the general public has more and more understanding of photovoltaic knowledge. As a leader in the inverter industry, Shengnengjie Technology is always at the forefront of technological innovation, and is committed to providing high-reliability, high-priced inverter host solutions and monitoring solutions to the public, contributing to the realization of photovoltaic parity online.
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