General Electric Company

Ge Infrastructure Technology, LLC

John Andrew Leonard

Sreedhar Desabhatla

William Robert Pearson

Sudeep Pathak

Mark Eugene Shepard

John Carver Maters

Jordan Brantley Casteel

John Robert Booth

Shashidhar Nibhanupudi

Douglas Gregg Fowley

Harry A Plumb

Malepati Bhavani Sankar

A system, including: a plurality of load commutated inverters (LCIs) connected in parallel, wherein each LCI includes: a source bridge for converting an alternating current (AC) voltage to a direct current (DC) voltage, wherein the source bridge includes at least one current switching device; a load bridge for converting the DC voltage from the source bridge to a variable frequency AC voltage; and a DC link coupling the source bridge to the load bridge; wherein each LCI includes a respective current regulator for controlling the at least one current switching device in the source bridge of the LCI to generate a current in the DC link.

Parallel operation of load commutated inverters

A system, in one embodiment, may include a system includes a ground fault detection system. The ground fault detection system includes a linear filter configured to receive one or more signals from a static starter system during operations of the static starter system and to produce a linear filter output. The ground fault detection system further includes a rectifier configured to rectify the linear filter output and to produce a rectifier output, and a gain system configured to multiply the rectifier output by a factor to produce a gain output. The ground fault detection system additionally includes a fault indicator system configured to indicate a ground fault based on the gain output, wherein the ground fault detection system is configured to command an action based on the ground fault.

System and method for ground fault detection of static starter circuitry

A method for initializing a generator may include sending a field reference voltage to an exciter that may provide a direct current (DC) current and a DC voltage to a rotor of a generator based on a current set point that corresponds to the field reference voltage. The method may then include receiving a voltage feedback signal output by the generator, determining one or more locations of one or more poles of the generator based on the voltage feedback signal, and sending one or more firing signals to one or more switches of a starter after determining the locations of the poles, such that the switches couple the voltage to a stator of the generator.

Systems and methods for initializing a generator

Embodiments provide systems and methods for controlling electronic circuitry. A system can include at least a first controller and a second controller and at least one power electronic circuitry module. The first controller can be in electrical communication with the power electronic circuitry module via a first high-speed serial link (HSSL). The second controller can be in electrical communication with the power electronic circuitry module via a second HSSL.

Systems and methods for controlling electronic circuitry with separated controllers

A method to convert direct current (DC) power generated by a photovoltaic (PV) arrays to alternating current (AC) power using a PV inverter, the method includes: applying the DC power generated the PV array to the PV inverter; boosting the DC power from the PV array from a predetermined voltage level to a predetermine DC link voltage, wherein the PV array is regulated by the boosting to output a voltage at the predetermined voltage level; converting the boosted DC power to AC power, and disabling the boost of the power generated by the PV array after the array has a predetermined voltage level at least as great as the DC link voltage.

Method and system to convert direct current (DC) to alternating current (AC) using a photovoltaic inverter

An interface card connects a LAN with a drive. The interface card comprises a dual port memory interface, which interfaces to the main control card of the drive. An interrupt line informs a communication processor on the main control card to update feedbacks in the dual port memory and read the set points from the dual port memory. Special control registers interface the communication processor with the LAN. The apparatus also facilitates a method for interfacing the drive to the LAN without modifying the main control card of the drive.

Method and apparatus for interfacing a LAN to a drive

Motor-load inertia of a drive system is determined from motor friction current and the time required to accelerate and decelerate to a predetermined speed in response to a current command. A desired response time provided by the operator is checked to determine if the response time is achievable with the motor-load inertia previously determined. The maximum achievable response time based on motor-load inertia is determined if the desired response time is not achievable. The speed loop parameters based on the achievable response time and motor-load inertia.

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Roanoke, VA, United States of America

John Andrew Leonard