DC‐linked hybrid generation system with an energy storage device including photovoltaic generation and gas engine cogeneration for residential houses

Abstract

For the past few years, hybrid generation systems including solar panel and gas cogeneration have been used for residential houses. Solar panels can generate electronic power at daytime but not at night. But the power consumption of residential houses usually peaks in the evening. The gas engine cogeneration system can generate electronic power without such a restriction, and it also can generate heat power to warm up a house or to produce hot water. In this paper we propose a solar panel and gas engine cogeneration hybrid system with an energy storage device, combined by a DC bus. If a blackout occurs, the system still can supply electronic power for special house loads. We propose a control scheme for the system related to the charging level of the energy storage device and the voltage of the utility grid, which can be applied to both grid-connected and standalone operation. Finally, we report experiments designed to demonstrate system operation and calculations for loss estimation.

Control of Uninterrupted Switching Using a Virtual Synchronous Generator Between Stand‐Alone and Grid‐Connected Operation of a Distributed Generation System for Houses

“…In DM control, constant voltage control is applied to the AC voltage e pn so that the output voltage is maintained at 200 V and 60 Hz. On the other hand, in CM control, balance control is performed so that the AC voltages e p and e n are maintained at 100 V on both the p-side and the n-side [8]. That is, e p + e n is controlled at 0 V.…”