Photovoltaic inverter fast response

Can a fast frequency response technology be used for photovoltaic power plants?

This paper proposes a fast frequency response technology for photovoltaic power plants based on equivalent modelling.

What is fast frequency response (FFR) of inverter-based resources?

The fast frequency response (FFR) of inverter-based resources is an important mitigation option for maintaining grid security under the conditions of low inertia and insufficient primary frequency response capability. However, the understanding and technical characteristics of the FFR of inverter-based resources are still unclear.

Can photovoltaic systems support grid frequency regulation?

Previous studies have proposed an active power control of photovoltaic systems to support grid frequency regulation in two different forms, namely slow frequency control that facilitates load frequency control and fast frequency that facilitates synchronous generator inertial response control.

Should inverters increase real power to support low frequency?

If active power is available, inverters should also increase real power to support low frequency. The NERC reliability guideline specifies that “the active power-frequency control system should have an adjustable proportional droop characteristic with a default value of 5%”.

Why do PV systems need a primary frequency response (PFR)?

During system imbalance, PFC is not sufficient to limit the frequency excursion due to reduced inertia. To cope with frequency stability challenges, PV systems are required to provide sufficient primary frequency response (PFR) and participate in frequency regulation to reinforce grid security.

How to improve system frequency response under high PV penetration?

CONCLUSIONS To improve the system frequency response under high PV penetration, this paper studied different control strategies of PV farms to support grid frequency. These control include, synthetic inertia control, synthetic governor control, and AGC control.