47results about How to "Reduce energy storage capacity" patented technology

Disclosed herein are a light emitting diode (LED) driving apparatus and driving method for continuously driving an LED. According to the present invention, an LED driving apparatus and driving method for continuously driving an LED capable of compensating for a light output of an LED lighting using an energy chargeable and dischargeable element and / or circuit are proposed.

The invention relates to a parallel-connected unified power quality control device, which belongs to the technical field of power electronics and flexible AC power transmission and distribution. The device includes a voltage source converter, an energy storage unit, a resonant electronic switch and a main control system. The main control system is composed of a main controller and various sensors; the resonant electronic switch is connected in series Between sensitive loads, the two ports of the resonant electronic switch are respectively PCC 1 Point and PCC 2 point; the AC output port of the voltage source converter is connected to the PCC in parallel 2 point, and its DC side capacitor ports are respectively connected to the corresponding output ports of the energy storage unit; the main controller generates a control gate signal output and is connected to the voltage source converter and the resonant electronic switch. The method is to judge various power quality faults and control the device to quickly switch and operate among four modes; the invention has the advantages of simple structure, low cost, strong overload resistance and high operating efficiency.

The invention discloses a control method of a hybrid energy storage system for stabilizing the power fluctuation of an intermittent type power source, comprising the following steps of acquiring the real-time power of the intermittent type power source, the synthetic output power of power and stored energy, the SOC (State of Charge) of a battery and the voltage of a supercapacitor by a data acquisition module, and sending data to a stabilizing and control module; processing the data in the stabilizing and control module and judging whether the power output is needed or not according to a fluctuation power; and in the case of needing power output, outputting a control power instruction and a charge / discharge instruction, and carrying out output by the energy storage system according to the control instruction, wherein electric energy output by the energy storage system passes through PCS (Power Converters), is synthesized with the output of the intermittent type power source through a circuit breaker respectively and merges into a power grid through a transformer. By the adoption of the control method of the hybrid energy storage system for stabilizing the power fluctuation of the intermittent type power source, the defects that when the power fluctuation of the intermittent type power source is stabilized by the prior art, as the energy storage system mainly adopts a single energy storage medium, the ability of stabilizing the power fluctuation of the intermittent type power source is weak and the service life of an energy storage element is shorter are overcome; and therefore, the practicability and the economical efficiency are enhanced.