ESIGN AND M ODELLING OF S TANDALONE H YBRID P OWER S YSTEM WITH M ATLAB / S IMULINK
This paper presents a standalone hybrid power system using wind/PV/diesel/Battery energy system with Matlab/Simulink environment. PV & Wind are the primary power sources of the system and battery is used as a backup for long run application. Here we have also compare the performance of PV/Wind/Battery connected system with PV/Wind/Diesel connected hybrid power system. The most frequently used renewable energy sources are those consisting of PV module and/or wind Turbine with/or Diesel generator, and some energy storage or backup system.
Hybrid solar–wind system with battery storage operating in grid-connected and standalone mode: Control and energy management – Experimental investigation
The paper presents experimental results from the operation of a test bench constituted of a Grid-connected Hybrid system. This device includes wind and photovoltaic (PV) physical emulators, battery energy storage, load and a controlled interconnection to the Low Voltage (LV) grid. Both the Wind generation unit and the PV generation unit are connected to the weak AC grid via a single phase inverter with a lead acid accumulator. The grid power inverter is suitably controlled to permit the operation of the system either interconnected to the LV grid, or in standalone mode, with a seamless transfer from the one mode to the other. The paper provides a technical description of the Hybrid system devices and of the inverter energy management, along with extensive measurement results which demonstrate the system capability to operate in the aforementioned mode.
Steady-State Performance of a Grid-Connected Rooftop Hybrid Wind-Photovoltaic Power System with Battery Storage
This paper reports the performance of a 4 kW grid-connected residential wind-photovoltaic system (WPS) with battery storage located In Lowell, MA. The system was originally designed to meet a typical New England (TNE) load demand with a loss of power supply probability (LPSP) of one day in ten years, as recommended by the Utility Company. The data used in the calculation were wind speed and irradiance of Logan Airport Boston (LAB), obtained from the National Climate Center in North Carolina. The present performance study is based on two-year operation (May 1996 to April 1998) of the WPS. Unlike conventional generation, the wind and the sunrays are available at no cost and generate pollution-free electricity. At around noon the WPS satisfies its load and provides additional energy to the storage or to the grid. On-site energy production is undoubtedly accompanied with minimization of environmental pollution, reduction of losses in power systems transmission and distribution equipment, and supports the utility in demand side management (DSM). This paper includes discussions on system reliability, power quality, loss of supply, and effects of the randomness of the wind and the solar radiation on system design.