Characteristics of photovoltaic power station generator sets

Do photovoltaic cells have output characteristics?

Photovoltaic cells are a key component in solar power generation, so thorough research on output characteristics is of far-reaching importance. In this paper, an illumination model and a photovoltaic power station output power model were established, and simulation analysis was conducted using Matlab and other software.

Why should PV generators be integrated into the grid?

With the increased integration of PV generators into the grid, the system operators start to require PV generators have capabilities to stay online during the fault, and provide the active power and the reactive power supports when being required to do so.

How is a PV generator modeled in a power system steady state study?

A PV generator is modeled as a constant active power and reactive power source in power system steady state studies. When PV generation changes due to the ambient environment, the power system steady state studies do not investigate the transients of the power system caused by the change in PV generation.

How does a PV generator work?

By controlling the instantaneous three-phase inverter output voltages v a, v b and v c, the PV generator controls the active power output and the reactive power interchanges with the external grid.

What is a three-phase grid-tied PV generator?

Three-phase PV generators, such as the utility-scale solar power plants, are often connected to the high voltage sub-transmission or transmission networks. This paper focuses on the dynamic models of the PV generator for power system dynamic studies, thus will concentrate on the three-phase grid-tied PV generator.

Is a photovoltaic generator a PQ node?

Unlike a conventional generator that is often modeled as a PV node (set the generator’s terminal voltage and its active power output constant), a photovoltaic generator is operated as a PQ node (set the photovoltaic generator’s active power and reactive power outputs constant).