| 摘要 |
<p>A system and method for transferring excess renewable power generated in a domestic setting to a secondary load so as to maximize the use of renewable power. Current sensors 11, 12 are used to monitor the amount of power supplied to primary loads, such as appliances, from the renewable source 14 and the maximum instantaneous power generated by the renewable source 14. These values are compared and if the instantaneous power is greater than the demand in the primary loads, excess renewable power is supplied to a secondary load 28, which may be a water heater or battery. A control unit 18 achieves this by operating drive circuitry 19 comprising a pulse width modulator with variable duty cycle as a function of the result of the power comparison; a larger amount of excess power results in a higher duty cycle. Filtering circuitry 15, 29 is provided to reduce electrical noise and absorb harmonic distortions. AC or DC renewable power may be used as the supply.</p> |
