On grid string inverter HC50KTLSI intelligent control

Hua Cheng's grid string inverter intelligent control is a high-efficiency photovoltaic string inverter with built-in LED and other modules that can be used for monitoring. Its intelligent control function and APP monitoring function allow users to directly obtain the battery and other equipment through the mobile phone. The main features of this power inverter module are:
High Availability & Usability
● Integrate with functions of confluence and DC lightning protection, reducing user costs.
● 4 independent MPP trackers with flexible configuration and installation, improving energy generated
● Mobile APP, RS485, USB, Ethernet interface and Wi-Fi wireless communications
● PLC power carrier communication technology, no need of special communication cables.
● Built-in data library, complete saving of daily/weekly/monthly/yearly operation information

High Efficiency Power Generation
● Wide DC input range up to 1100V
● Transformerless design, conversion efficiency up to 99%, Europe efficiency up to 98.7%
● 8 strings of intelligent monitoring and failure detection, which reduces time of fault location and provides accurate and timely detection of the PV panels mismatch
● Integrate with PID elimination function of PV panels, reducing power generation attenuation

Advanced Control Technology
● Continuous regulation (0 ~ 100%) function of active power
● Adaptive control technology, adapting to harsh weak power grids environment
● Meet the various requirements of reactive power regulation, power factor range is 0.8 leading to 0.8 lagging
● LVRT, HVRT and SVG function at night

High Reliability
● DC shut-off circuit breaker for safe and convenient maintenance operating
● Non-fuse design, avoiding risk of fire caused by DC sides failure
● Natural heat convection, no need of external fans
● 5 years standard warranty, 25 years extension warranty

In the string system, the PV modules are connected in series to form a PV string, and the single or two parallel PV strings pass through the independent DC/DC DC boost converters inside the string inverter, and then share the string inverter. The same set of inverter circuits inside the device realizes grid-connected power generation. Therefore, this string system architecture has multiple MPPT functions. This kind of system generally has two-stage power conversion structure of DC boost and AC inverter. When the input voltage is low, the DC boost converter will work and complete the MPPT function. When the input voltage is high, the MPPT function is realized by AC inverter. . Group-type inverters are widely used in distributed photovoltaics. They are generally installed in industrial and commercial or domestic roofs, and can also be installed in agricultural greenhouses, fishing ponds, and barren hills. The household roof is distributed using a single-phase grid-connected inverter, and the power section is generally from 1.6 to 5 kW. Other medium and large power applications use three-phase grid-connected inverters, and the power section generally ranges from 5 to 60 kW.