Systems and methods for charging and discharging active power link modules in direct current power system
A technology of active power and links, applied in the field of electric power conversion and electric energy storage systems, can solve problems such as increased operation downtime and maintenance costs, less replaceable unit modularity, and increased risk of equipment damage
Active Publication Date: 2019-07-26
GE ENERGY POWER CONVERSION TECH
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Problems solved by technology
ESDs such as high energy supercapacitors offer several benefits in DC power systems, but in such known systems and methods, charging and discharging them is cumbersome and places the supporting electrical loads in service for extended periods of time Outside
[0005] Also, in at least some known systems and methods for charging and discharging ESDs in DC power systems, charging and discharging functionality and control are not integrated on a system-wide basis
Such known systems and methods therefore require the operator to use separate components for charging and discharging the ESD, which increases operational downtime and maintenance costs and increases the risk of equipment damage
Furthermore, such known systems and methods lack modularity including simple and rapidly implementable least replaceable units (LRUs) that are configurable in widely varying system designs at multiple voltage levels to suit specific application
Method used
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[0019] In the following specification and claims, reference will be made to various terms which shall be defined to have the following meanings.
[0020] The singular forms "a, an" and "the" include plural references unless the context clearly dictates otherwise.
[0021] "Optional" or "optionally" means that the subsequently described event or circumstance may or may not occur, and that the description includes instances where the event occurs and instances where it does not.
[0022] Approximate language, as used herein, may be applied throughout the specification and claims to modify any quantitative representation that would permit a change without resulting in a change in the basic function to which it is associated. Accordingly, a value modified by a term or terms such as "about," "approximately," and "substantially" is not to be limited to the precise value specified. In at least some instances, the approximate language may correspond to the precision of an instrument ...
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A modular power converter system includes a plurality of active power link modules (APLMs) coupled to each other, each APLM having a plurality of switching devices including first and second switchingdevices coupled to each other, and at least one first-type energy storage device (ESD) coupled in parallel with both of the first and second switching devices, the first-type ESD configured to inducea first direct current (DC) voltage. The system also includes a plurality of relays coupled to the first-type ESD, and a charge controller coupled to at least one APLM of the plurality of APLMs and coupled to at least one of an electrical power source and a discharge circuit. The charge controller is configured to alternately charge and discharge the first-type ESD in response to a plurality of switching states including switching states of the plurality of switching devices and the plurality of relays.
Description
[0001] Statement Regarding Federally Sponsored Research and Development [0002] This invention was made with Government support under Contract No. N00014-14-C-0103 awarded by the United States Institute of Oceanography. The government may have certain rights in this invention. Background technique [0003] The field of the disclosure relates generally to electrical power conversion and electrical energy storage systems, and more particularly to systems and methods for charging and discharging active power link modules (APLMs) in direct current (DC) power systems. [0004] In at least some known systems and methods for charging and discharging energy storage devices (ESDs) in DC power systems, for maintenance and replacement, electrical load support functions are interrupted to remove and replace discharged and faulty ESD. ESDs such as high energy supercapacitors offer several benefits in DC power systems, but in such known systems and methods, charging and discharging them ...
Claims
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IPC IPC(8): H02J7/00H02J1/10H02J3/32H02M7/217H02M7/49H02M7/539H02J7/34
CPCH02J7/0018H02J7/0016H02J2207/20H02J7/342H02J1/06H02J1/001H02M7/4835H02M7/66H02M1/0077H02M1/322H02J1/10H02J7/345H02M7/217H02M7/49H02M7/539
InventorT.萨迪莱克周锐周智P.M.乔菲东栋
OwnerGE ENERGY POWER CONVERSION TECH