Angular Frequency Dynamic-Based Control Technique of a Grid-Interfaced Converter Emulated by a Synchronous Generator

Abstract

In this paper, an angular frequency dynamic-based control technique is proposed to control interfaced converters between the power grid and renewable energy sources. The proposed control technique can guarantee a stable operation of power grid under high penetration of renewable energy resources through providing the required inertia properties. The synchronous generator characteristics combined with the basic dynamic model of the interfaced converter can shape a second order derivative of the grid angular frequency consisted of converter power and virtual mechanical power derivative with embedded virtual inertia to prevent from the power grid instability as well as generate active and reactive power with appropriate inertia. Simulation analyses are performed in Matlab/Simulink to confirm high performance of the proposed control technique.

Virtual Inertia and Mechanical Power-Based Control Strategy to Provide Stable Grid Operation under High Renewables Penetration

“…Emulating the behaviours of a synchronous generator (SG) in the structure of novel control techniques for power electronics converters has been increased in recent years in order to guarantee the stability of the power grid under high penetration of renewable energy sources [1][2][3][4][5][6][7].…”

Control of Grid-Tied Converters for Integration of Renewable Energy Sources into the Weak Grids

“…Significant portions of these approaches require complete calculation of the SG model, making implementation more complicated and less practical. In a simpler method, proposed in [2], only the essential pieces of the SG model (i.e., the swing equation) is considered, and the rotor frequency is calculated by solving the swing equation. Oscillation damping capability and adjustable moment of inertia also have been discussed in [3]- [6], to improve dynamic response and avoid overcurrent in interface converters.…”

Large-Scale Grid Integration of Renewable Energy Resources with a Double Synchronous Controller

“…This paper presents a new control strategy, i.e., the double synchronous controller (DSC) for the integration of large scale RERs into the power grid through the power electronics converters. The performance of the DSC is compared with a non-synchronous controller (NSC), which is not included by any emulation which has not been investigated in other related works of the authors in [30][31][32][33][34][35][36]. The main contributions of proposed DSC over existing methods can be stated as (1) more comprehensive relationship between interfaced converter and SGs dynamic models, (2) a more decoupling feature for both d and q components, (3) those components are completely involved with the SG's characteristics, (4) robustness feature against the unknown intrinsic property of parameters, and (5) more detailed features of the SGs are contributed to provide appropriate virtual inertia.…”

“…The main contributions of proposed DSC over existing methods can be stated as (1) more comprehensive relationship between interfaced converter and SGs dynamic models, (2) a more decoupling feature for both d and q components, (3) those components are completely involved with the SG's characteristics, (4) robustness feature against the unknown intrinsic property of parameters, and (5) more detailed features of the SGs are contributed to provide appropriate virtual inertia. In addition, regarding the mentioned contributions of this manuscript, the robustness features and error curves have not been paid attention in previous works of the authors in [30][31][32][33][34][35][36].…”