Chemistry

Inertia

Engineering

Artificial intelligence

Power (physics)

Biochemistry

Telecommunications

Physics

Control engineering

Frequency response

Gene

Inverter

Quantum mechanics

Electric power system

Frequency deviation

Voltage

Automatic frequency control

Computer science

Control (management)

Electrical engineering

Power Balance

Classical mechanics

Permanent magnet synchronous generator

Control theory (sociology)

Power control

Robustness (evolution)

IEEE Transactions on Power Systems

The virtual synchronous generator (VSG) improves the robustness of the inverter-interfaced distributed generator (IIDG) against instability by introducing a virtual inertia. However, the transient response of the active power and the angular frequency conflict with each other for the IIDG with fixed inertia control. It is necessary to adopt adaptive control to improve overall performances of power and frequency as the operating condition changes. This paper analyzes the impact of the inertia on power and angular frequency. A dual-adaptivity inertia control strategy is proposed to offer a responsive and stable frequency support and also achieve the balance between power regulation and frequency regulation according to different operating conditions. The principle of parameter design is given to obtain the range of adaptivity. Quantitative assessment considering the cumulative effect of the output deviation and its duration is also presented to evaluate the proposed strategy intuitively. The strategy is further verified based on PSCAD/EMTDC and a hardware-in-loop experiment platform based on RTDS. Results confirm that the proposed strategy not only achieves rapid frequency response with slight dynamic deviations under disturbances but also strikes a balance between the frequency and power and leads to improved overall control.

A Dual-Adaptivity Inertia Control Strategy for Virtual Synchronous Generator