Chint photovoltaic module grid-connected inverter

What is a PV string inverter?

To avoid any other unforeseeable risk, contact your dealer immediately, if there is any issue found during operation. 2.1.1 Function This series is a single-phase grid-tied PV string inverter (transformer less) that converts the DC power generated by PV strings into AC power and feeds the power into power grid. The inverter is transformerless.

What is a grid-tied PV power system?

The series applies to grid-tied PV power systems for outdoor power stations. Typically, a grid-tied PV power system consists of PV modules, grid-tied inverters, AC distribution units, and low-voltage power grid, as shown in Figure 2.2. Inverters have been tested as per AS/NZS 4777.2:2020 for three-phase combinations.

How to connect a PV module to a DC inverter?

PV modules generate electric energy when exposed to sunlight and can create an electrical shock hazard. Therefore, when connecting the PV modules, shield them with opaque cloth. Before connecting DC input power cables, ensure that the voltage on the DC side is within the safe range and that the DC SWITCH on the inverter is OFF.

How does a PV inverter work?

Then the inputs are grouped into two MPPT routes inside the inverter to track the maximum power point of the PV strings. These two MPPT power is then converted into DC Bus which is then converted to AC power through an inverter circuit. Finally the converted AC power is fed to the Power grid through the inverter.

Can a grid-tied inverter maintain DC input power cables?

Otherwise, high voltage may result in electric shock. When the inverter is grid-tied, it is not allowed to maintain DC input power cables, such as connect or disconnect a string or a module in a string. Only after the inverter enters in shutdown mode, it is allowable for preceding DC input power cables maintenance.

What if PV modules input voltage exceeds the inverter's allowable range?

PV modules input voltage exceeds the inverter’s allowable range. Check the number of PV modules and adjust it if need. PV modules input voltage is under the inverter’s defaulted protection value. When sunlight intensity weakens, PV modules voltage decreases. No action is needed. 2.