Energy management strategy for a battery-diesel stand-alone system with distributed PV generation based on grid frequency modulation

RENEWABLE ENERGY

卷:66

Article

Urtasun, Andoni¹  Sanchis, Pablo¹  Barricarte, David²  Marroyo, Luis¹ 

[1] Univ Publ Navarra, Dept Elect & Elect Engn, Pamplona 31006, Spain

[2] Ingeteam Power Technol, Dept PV Solar Energy, Sarriguren 31621, Spain

关键词: Battery;    Charge controller;    Diesel generator;    Energy management strategy;    Photovoltaic power;    Stand-alone system;   

DOI  :  10.1016/j.renene.2013.12.020

来源: Elsevier

【 摘 要 】

A hybrid PV-battery-diesel configuration is very attractive for stand-alone systems in terms of cost and reliability. In many applications, the battery and the diesel generator are centralized and generate the AC grid while the PV generators and loads are distributed and are connected to the grid. However, in these cases, long communication cables are required in order to reduce the PV power when the battery is fully charged. This paper proposes an energy management strategy which makes it possible to avoid the use of communication cables, rendering the system simpler, cheaper and more reliable. The strategy dictates that should a power reduction be required, the battery inverter increases the grid frequency. This is detected by the PV inverters, which continuously reduce their power in order to prevent the battery from overcharge or over-current. The strategy also optimizes the efficiency and operating life of the diesel generator. Simulation and experimental validation are carried out for a system with 10 kW PV generation, a 5 kVA battery inverter, a 5 kVA diesel generator and a 5 kVA load. (C) 2013 Elsevier Ltd. All rights reserved.

【 授权许可】

Free