Virtual Inertia Implementation in Dual Two-Level Voltage Source Inverters

In this paper, the implementation of virtual inertia in a dual two-level voltage source inverter (DTL VSI) configuration is investigated. The derivative control method is employed to provide virtual inertia. The virtual synchronous generator (VSG) topology is presented, and its elements are introduced. According to the frequency changes, the active power reference is generated. Moreover, the control structure is designed and presented to control the DTL VSI properly. By means of the derivative control method, the DTL VSI participates in the frequency regulation, and the frequency oscillations during contingencies are confined. The results show that the controller follows its reference in all cases. The potentiality of the proposed controller is confirmed through MATLAB simulations. Compared to the conventional DTL VSI, the rate of change of frequency (ROCOF) and frequency nadir are reduced during disturbances.

[1]  Hamed Nafisi,et al.  Introduction and Advantage of Space Opposite Vectors Modulation Utilized in Dual Two-Level Inverters With Isolated DC Sources , 2019, IEEE Transactions on Industrial Electronics.

[2]  Frede Blaabjerg,et al.  Grid Integration of a Dual Two-Level Voltage-Source Inverter Considering Grid Impedance and Phase-Locked Loop , 2021, IEEE Journal of Emerging and Selected Topics in Power Electronics.

[3]  Edris Pouresmaeil,et al.  Adapted near‐state PWM for dual two‐level inverters in order to reduce common‐mode voltage and switching losses , 2019, IET Power Electronics.

[4]  T. Ise,et al.  Stabilization of a power system with a distributed generator by a Virtual Synchronous Generator function , 2011, 8th International Conference on Power Electronics - ECCE Asia.

[5]  Xinbo Ruan,et al.  Small-Signal Modeling and Parameters Design for Virtual Synchronous Generators , 2016, IEEE Transactions on Industrial Electronics.

[6]  Luiz A. C. Lopes,et al.  Self-Tuning Virtual Synchronous Machine: A Control Strategy for Energy Storage Systems to Support Dynamic Frequency Control , 2014, IEEE Transactions on Energy Conversion.

[7]  Yasser Abdel-Rady I. Mohamed,et al.  Integrating VSCs to Weak Grids by Nonlinear Power Damping Controller With Self-Synchronization Capability , 2014, IEEE Transactions on Power Systems.

[8]  M. C. Chandorkar,et al.  Improvement of Transient Response in Microgrids Using Virtual Inertia , 2013, IEEE Transactions on Power Delivery.

[9]  Yushi Miura,et al.  Power System Stabilization Using Virtual Synchronous Generator With Alternating Moment of Inertia , 2015, IEEE Journal of Emerging and Selected Topics in Power Electronics.

[10]  Josep M. Guerrero,et al.  Inducverters: PLL-Less Converters With Auto-Synchronization and Emulated Inertia Capability , 2016, IEEE Transactions on Smart Grid.

[11]  Qing-Chang Zhong,et al.  Synchronverters: Inverters That Mimic Synchronous Generators , 2011, IEEE Transactions on Industrial Electronics.

[12]  Pedro Rodriguez,et al.  Analysis of derivative control based virtual inertia in multi-area high-voltage direct current interconnected power systems , 2016 .

[13]  Jia Liu,et al.  Comparison of Dynamic Characteristics Between Virtual Synchronous Generator and Droop Control in Inverter-Based Distributed Generators , 2016, IEEE Transactions on Power Electronics.

[14]  Bin Li,et al.  Improved power decoupling control strategy based on virtual synchronous generator , 2017 .

[15]  Johan Driesen,et al.  Layout and performance of the power electronic converter platform for the VSYNC project , 2009, 2009 IEEE Bucharest PowerTech.