Product Protection Functions; Circuit Structure Design - YASKAWA PVI 36TL Installation And Operation Manual

PVI 36TL Installation and Operation Manual (Rev H)

1.3 Product Protection Functions

 Reverse polarity protection of DC input
 Short circuit protection
 Arc-Fault Circuit Interruption
 Anti-islanding protection
 Input and output over-voltage protection
 Input over-current protection
 Monitoring of DC input insulation against ground
 Monitoring of AC output voltage and frequency
 Monitoring of Leakage current against ground
 Monitoring of DC injection from AC output
 Monitoring of ambient temperature
 Monitoring of IGBT module temperature

1.4 Circuit Structure Design

The basic schematic diagram of PVI 36TL inverter is shown in Figure 1.2.
The input of PV modules passes through surge protection circuitry, DC EMI wave filter,
and the front-end boost circuitry to achieve maximum power tracking and boost up
voltages. The output of the inverter converts the DC voltage to 3-phase AC voltage.
The high frequency AC components are removed with a wave filter. Then the 3-phase
AC voltage is passed through two-stage relays and EMI wave filter to produce high
quality AC power.
Figure 1.2 - Schematic Diagram of PVI 36TL Inverter
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