Calculation of series compensation coefficient of photovoltaic inverter

In order to get closer to the engineering practice, the harmonic amplification coefficient of photovoltaic inverter connected to PCC is calculated by using impedance network solution when the power grid contains background harmonics.

In this paper, a comprehensive analysis of the operation performance of PV plant with series compensated line is presented in two scenarios: different levels of series compensation and different strengths of AC system.

A grid-tie solar inverter with a series voltage compensator for reducing the high-voltage dc-link capacitance is presented. The compensator obtains energy from the dc link to sustain the voltage on its dc side and generates an ac voltage to counteract the voltage ripple on the dc link.

With the increasing adoption of photovoltaic systems (PVs) in distribution grid, many researchers and grid operators have proposed and started to utilise PV inverters for local reactive power compensation (RPC). The local RPC has been shown to reduce losses in the system, and to help maintain voltage within acceptable range.

This paper presents the performance of a control strategy for an inverter in a three-phase grid-connected PV system. The system consists of a PV panel, a boost converter, a DC link, an inverter, and a resistor-inductor (RL) filter and is connected to the utility grid through a voltage source inverter.

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6 FAQs about [Calculation of series compensation coefficient of photovoltaic inverter]

Can PV inverters be used for local reactive power compensation?

How does a PV inverter affect RPC?

Nevertheless, the RPC using a PV inverter increases the current flowing through it, and hence the losses and the temperature of its components. As a result, the lifetime of the inverter will be reduced with increasing reactive power usage, incurring costs to the system owner and increases the PV levelised cost of electricity (LCOE).

How to calculate harmonic amplification coefficient of photovoltaic inverter connected to PCC?

Can a three-phase grid-connected PV system control an inverter?

How does a PV inverter affect harmonic amplification in PCC voltage?

With increasing the PV output power, the maximum harmonic amplification coefficient in the low frequency band also grows to 1.228. Meanwhile, with the output power grows, the PV inverter causes harmonic amplification in PCC voltage.

Why does a PV inverter have a series parallel resonance?

When the PV inverter is connected to the grid, series–parallel resonance may occur due to the dynamic interaction between multiple inverters operating in parallel and between the PV inverter and the grid impedance. Consequently, this leads to changes in the output voltage harmonic characteristics of the PV plant.

Calculation of series compensation coefficient of photovoltaic inverter