Photovoltaic inverter model parameter table

What is a PV inverter?

The PV inverter is the point of conversion from DC to AC power. In small residential applications, the PV inverter is usually single phase, converting DC to single-phase AC (60 Hz). The PV array is connected to the PV inverter via a maximum power point tracker to optimize energy conversion from sunlight to electrical power.

What is a typical model validation of a PV inverter?

A typical model validation will represent a PV plant as shown in Figure 55, in which a single PV inverter represents the total generation of an entire plant. The first step-up transformer connecting the PV inverter to the collector system is used to step up the voltage from low voltage to medium voltage (e.g., 480 V/34.5 kV).

Why is a PV inverter model important?

The inverter model, particularly when coupled with an accurate array performance model, provides significant improvements in the ability to analyze PV system performance, monitor inverter and array performance, and diagnose causes of system performance degradation.

What are the reference values for a PV inverter?

The reference values of the active and reactive currents can be expressed as follows: PDC−VDC curves with r = 0 Ω and r = 0.042 Ω, respectively. In the failure mode, the PV inverter operates at point G1 (actual operating point) when r = 0.042 Ω, and the DC voltage rises by 111 V.

How many PV power units are in a solar power station?

This station consists of 65 PV power units, and the circuit topology of each PV power unit is of a single-stage centralised structure, as shown in Fig. 1. A number of PV panels were connected in series to form a PV group. Then, several PV groups were connected in parallel to a high-power inverter for power conversion.

What is an inverter performance model?

The inverter performance model provides a new opportunity for accurately monitoring the performance and health of the inverter, in real time. Inverter monitoring can be accomplished by using a data acquisition system providing periodic measurements of dc voltage and power, as well as true ac power.