초록 ▼

A turbine (2) driven electric power production system (1),—said turbine (2) arranged for being driven by a fluid (3) having a fluid speed (v) varying in time,—said turbine (2) connected to a hydrostatic displacement pump (6) further connected to a hydrostatic displacement motor (8) as part of a clos

A turbine (2) driven electric power production system (1),—said turbine (2) arranged for being driven by a fluid (3) having a fluid speed (v) varying in time,—said turbine (2) connected to a hydrostatic displacement pump (6) further connected to a hydrostatic displacement motor (8) as part of a closed loop hydrostatic transmission system (7),—said motor (8) arranged for driving an electrical generator (9) supplying AC power (10) at a frequency (fg) near a given desired frequency (fdes), characterized by a closed loop system arranged for controlling a volumetric displacement (13) of the hydrostatic motor (8), comprising—a fluid speed meter (11m) arranged for producing a speed signal (11s) representing a speed (v) of said fluid (3), and—a rotational speed meter (12m) arranged for providing a rotational speed signal (12s) representing a rotational speed measurement (ω) of said turbine (2), —a motor displacement control system (15) for continuously receiving said speed signal (11s) and said rotational speed signal (12s) and arranged for calculating a control signal (16), —a volumetric displacement control actuator (17) on said hydrostatic motor, arranged for receiving said control signal (16) for continuously adjusting a volumetric displacement (d) of said hydrostatic motor (8) for maintaining a set turbine tip speed ratio (tsrset) and thereby providing an improved power efficiency of the power production system (1) during fluctuations in said fluid speed (v).

대표청구항 ▼

The invention claimed is: 1. A turbine driven electric power production system (1), comprisinga turbine (2) arranged for being driven by a fluid (3) having a fluid speed (v) varying in time,said turbine (2) connected to a hydrostatic displacement pump (6) further connected to a hydrostatic displacem

The invention claimed is: 1. A turbine driven electric power production system (1), comprisinga turbine (2) arranged for being driven by a fluid (3) having a fluid speed (v) varying in time,said turbine (2) connected to a hydrostatic displacement pump (6) further connected to a hydrostatic displacement motor (8) as part of a hydrostatic transmission system (7),said motor (8) arranged for driving an electrical generator (9) supplying AC power (10) at a frequency (fg) near a given desired frequency (fdes),characterized bya closed loop control system (15,15a) arranged for continuously receiving a speed signal (11) representing the speed (v) of said fluid (3), from a fluid speed meter (11m), and further arranged for continuously receiving a turbine rotational speed signal (12s) representing the rotational speed measurement (ω) of said turbine (2), from a turbine rotational speed sensor (12m),based on said wind speed and turbine rotational speed signals (11, 12s), calculating a control signal (16) for a volumetric displacement control actuator (17) on said hydrostatic motor for continuously adjusting a volumetric displacement (d) of said hydrostatic motor (8), so as for enabling to maintain a set turbine tip speed ratio (tsrset) and thereby achieving an improved power efficiency of the power production system (1) during fluctuations in said fluid speed (v).