Browse Prior Art Database

Electrolytic Hydrogen Regenerative System Power Interface Scheme

IP.com Disclosure Number: IPCOM000012427D
Publication Date: 2003-May-07
Document File: 8 page(s) / 107K

Publishing Venue

The IP.com Prior Art Database

Abstract

An improved means of electrically interfacing the components of a regenerative hydrogen system generally including an electrical energy input source, an electrolytic hydrogen producer with compression equipment, hydrogen storage, a generator that produces electricity from hydrogen (eg. a fuel cell or an internal combustion engine (ICE) generator), a main power converter for providing AC/DC power output, and an optional small energy storage medium for additional energy storage or power "ride-through".

This text was extracted from a Microsoft Word document.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 26% of the total text.

Electrolytic Hydrogen Regenerative System

Power Interface Scheme

Abstract

An improved means of electrically interfacing the components of a regenerative hydrogen system generally including an electrical energy input source, an electrolytic hydrogen producer with compression equipment, hydrogen storage, a generator that produces electricity from hydrogen (eg. a fuel cell or an internal combustion engine (ICE) generator), a main power converter for providing AC/DC power output, and an optional small energy storage medium for additional energy storage or power “ride-through”. 

The improved means consists of direct electrical connection between the electrical components mentioned above, with power converter equipment only used at the main system output, optionally at the fuel cell/ICE gen. set output, for auxiliary power, for charging the small energy storage, and at the input of the electrolytic hydrogen producer if the input energy source is from an AC grid.  The scheme utilizes proper electrical matching of the components and effective control techniques.  This matching and control, plus the minimal use of power converter equipment, improves the overall efficiency of the system, lowers the capital cost, improves the reliability, lessens the size and weight, and simplifies repair and maintenance.

Summary of the Invention

Configurations

It is the object of the presented invention to provide an efficient, cost effective power interface solution for electrolytic hydrogen regenerative systems used in such applications as back-up power, UPS, and renewable/regenerative systems.

The power interface scheme uses matching, by design, between the main system components, including components within the electrolytic hydrogen producer itself, and effective control techniques to minimize power converter requirements.

More specifically, the main system components could include:

1)      Electrical energy input source – renewable power generators not restricted to wind generators and PV panels, independent fuel sourced generators, utility or mini-grid power.

2)      Electrolytic hydrogen producer – electrolytic cells; compressor with drive motor; auxiliary power for controls, valves, fans, pumps, and other equipment/instrumentation.

3)      Hydrogen storage – compressed gas, metal hydride, other.

4)      Hydrogen to electricity generator – ICE engine/generator set, fuel cell.

5)      Main power converter – DC/AC inverter, stand-alone or grid connect, generator tie-in and/or battery charging; DC/DC converter; AC transfer switch.

6)      Small energy storage medium (optional) – battery, super capacitor, flywheel, other.

7)      Load.

Fig. 1 is a general schematic of the possible configurations.  Not all of the connections shown would necessarily apply to any one configuration.  The following will present more detailed descriptions of the individual interface points as to electrical design and control techniques.

Main DC Bus

A main DC power bus (1) is established when the energy inpu...