A Novel Virtual Inertial Control Strategy for Double-Stage PV Generation
- Resource Type
- Conference
- Authors
- Yan, Gangui; Zhang, Xuelian; Zhang, Shanfeng; Yang, Huibiao
- Source
- 2018 2nd IEEE Conference on Energy Internet and Energy System Integration (EI2) Energy Internet and Energy System Integration (EI2), 2018 2nd IEEE Conference on. :1-5 Oct, 2018
- Subject
- Power, Energy and Industry Applications
Inverters
Phase locked loops
Voltage control
Frequency control
Power generation
Capacitors
Power systems
double-stage grid-connected PV generation
frequency regulation
virtual inertia control strategy
Boost converter
grid-side inverter
- Language
With an increasing penetration of PV generation in the electrical grid, the increasing replacement of large conventional synchronous generators by PV generation will result in short frequency regulation capability due to the reduced system inertia response. It is urgent for PV generation to take part in frequency regulation spontaneously. A virtual inertia control strategy based on the dynamic of high voltage DC capacitor for double-stage grid-connected PV generation is proposed in this paper. The influence of control parameters on virtual inertia control strategy is also analyzed. Finally, the theoretical analysis and control strategy are verified by simulation results. The results show that PV generation can provide more support power in the process of frequency sag when the integral coefficient of Boost converter voltage control loop is increase to slow down the dynamics response of DC voltage.