Direct Participation of Dynamic Virtual Power Plants in Secondary Frequency Control

TL;DR

This paper introduces a new control strategy enabling renewable energy sources within a Dynamic Virtual Power Plant to participate directly in secondary frequency control, matching traditional generators' performance.

Contribution

It presents a novel control scheme allowing RES in DVPPs to actively participate in secondary frequency control, including an internal redispatch mechanism for active power management.

Findings

Validated through simulation on a two-area benchmark system.

Demonstrated effective frequency support from RES in DVPP.

Achieved control performance comparable to traditional generators.

Abstract

This paper proposes a novel control strategy in which Renewable Energy Sources (RES) considered in a new Dynamic Virtual Power Plant (DVPP) concept directly participate to Secondary Frequency Control (SFC). This allows full participation of these generators to SFC, i.e., in the same manner as classic synchronous generators by fulfilling identical specifications from both control and contractual points of view. An internal real-time redispatch has been proposed to account in DVPP in order to determine the amount of active power injection by each RES unit for provision of frequency support in secondary level. The whole control scheme is designed to take into account both rapid and slow dynamics of modern power systems which contain both classic synchronous generators and rapid power electronics for renawable energy sources in which DVPP is supposed to be inserted. The performance of secondary frequency control strategy has been validated through simulation studies on a two-area benchmark with mixed wind power plants and classic synchronous generators. This work is part of the H2020 POSYTYF project (https://posytyf-h2020.eu/).