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WIND TURBINE BATTERY STORAGE SYSTEM

IP.com Disclosure Number: IPCOM000235897D
Publication Date: 2014-Mar-28
Document File: 3 page(s) / 56K

Publishing Venue

The IP.com Prior Art Database

Abstract

The present invention discloses a technique to improve efficiency of battery storage system in a wind turbine system. A heat pump is used to heat the batteries. The batteries are heated with waste heat from insulated-gate bipolar transistors (IGBTs) in the wind turbine power converter. The proposed technique uses two configurations. In first configuration, IGBTs are liquid or air cooled with temperature of a fluid. Waste heat is pumped or directly transferred to battery containment system. In second configuration, waste heat of IGBT is pumped to heat the individual batteries. Heat pump provides a high temperature increase. Such increased temperature heats the batteries to a temperature above the IGBT heat sink temperature. A variable speed motor or pump is used. The variable speed motor or pump operates at a speed which provides desired heat to heat the batteries to desired temperature.

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WIND TURBINE BATTERY STORAGE SYSTEM

BACKGROUND

The present invention relates generally to a wind turbine, and more particularly to a battery storage system in the wind turbine.

Generally, in a wind turbine, battery storage system is required. Battery storage system in wind turbine requires heaters. Sodium nickel batteries operate at over 300 degree Celsius and a heater is required to keep batteries hot. However, such heater reduces efficiency of the wind turbine.

Therefore, there is a need in the art for a technique to improve efficiency of battery storage system in wind turbines.

BRIEF DESCRIPTION OF THE DRAWINGS

 

Figure 1 depicts a first configuration. IGBT waste heat is used to heat an enclosure around batteries.

Figure 2 depicts a second configuration. IGBT waste heat is pumped to heat the individual batteries.

DETAILED DESCRIPTION

The present invention discloses a technique to improve efficiency of battery storage system in a wind turbine system. A heat pump is used to heat the batteries. The batteries are heated with waste heat from insulated-gate bipolar transistors (IGBTs) in the wind turbine power converter. The proposed technique uses two configurations.

Figure 1 depicts a first configuration. The IGBTs are liquid or air cooled with a temperature of a fluid. Waste heat is pumped or directly transferred to battery containment system. A thermal buffer is created between the battery housing and ambient conditions. The thermal buffer reduces  heat loss of the batteries over direct contact to the existing ambient conditions. Such thermal buffer takes shape of a water jacket or warm air around the battery containment system.

Figure 1

Figure 2 depicts second configuration. Waste heat of IGBT is pumped to heat the individual batteries. Heat pump provides high temperature increase.  Such increased temperature heats the batteries to a temperature above the IGBT heat sink temperature. A variable speed motor or pump is used. The vari...