Adaptive Virtual Inertia Calculation for a Virtual Synchronous Generator-Based Building-to-Building Grid

The paper presents an adaptive inertia calculation in a virtual synchronous generator (VSG) based on a building-to-building (B2B) distribution system. Adaptation of the virtual inertia value is done using a disturbance-based approach, following previous literature, which introduces an excitation signal while using voltage, frequency, and power measurements to estimate the inertia. The main benefit of adaptive inertia comes from a reduction in the real power and frequency oscillations, which results in an improvement in the battery system's estimated useful life. The proposed system calculates the virtual inertia of the VSG based on the energy management optimization of the B2B system, based on the photovoltaic (PV), battery state of charge (SoC), and the power exchange between the buildings considering the grid. The system adjusts the virtual inertia with a droop-based control depending on the power exchange between the buildings, and the cost of energy exchange. The proposal is validated by simulation of two buildings in parallel with a grid in MATLAB/SIMULINK.