Benefits of Installing SVG Static Var Compensators in Photovoltaic Power Stations

Against the backdrop of rapid new energy development, photovoltaic (PV) power stations have become an important component of power systems. However, with the continuous expansion of grid-connected capacity, power quality issues have become increasingly prominent, especially the impact of reactive power fluctuations on grid stability, which is growing more significant.

First, it is essential to recognize that PV power stations feature obvious volatility and intermittency. Affected by factors such as light intensity and cloud cover changes, the output power of inverters fluctuates at any time, resulting in unstable system power factor.

The Static Var Generator (SVG) is capable of fast and continuous reactive power regulation, responding to load changes at the millisecond level to achieve dynamic reactive power compensation for the power grid.

1.By installing SVG equipment, PV power stations can effectively maintain the power factor within a reasonable range, thereby reducing electricity tariff enalties caused by low power factor.

2.Furthermore, SVG static var compensators offer remarkable advantages in enhancing voltage stability. During grid-connected operation, especially in long-distance power transmission or weak grid environments, PV power stations are prone to voltage fluctuations and even voltage violations. SVG can automatically absorb or generate reactive power according to system voltage changes, realizing precise voltage regulation and ensuring stable voltage at the point of common coupling (PCC). This not only helps improve the safety of the power generation system but also strengthens the grid's capacity to accommodate new energy.

3.In addition, SVG provides excellent harmonic suppression capabilities. In actual operation, although PV inverters have certain filtering functions, they may still generate a certain proportion of harmonic currents under complex operating conditions. Adopting advanced power electronic control technology, SVG can compensate for and suppress certain harmonics, thereby improving power quality and reducing losses and impacts on transformers, cables and other equipment. This is of great significance for extending the service life of equipment.

In summary, installing SVG static var compensators in PV power stations can not only solve key problems such as power factor fluctuations and voltage instability, but also play a vital role in improving power quality, reducing losses and enhancing system stability.