Invention Grant
- Patent Title: Three phase inverter DC-link voltage control method for reactive power overload transient process
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Application No.: US16164361Application Date: 2018-10-18
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Publication No.: US10431983B2Publication Date: 2019-10-01
- Inventor: Zitao Wang , Christine McNeil , James Fisher
- Applicant: S & C Electric Company
- Applicant Address: US IL Chicago
- Assignee: S & C Electric Company
- Current Assignee: S & C Electric Company
- Current Assignee Address: US IL Chicago
- Main IPC: H02M7/5395
- IPC: H02M7/5395 ; H02J3/18 ; H02M1/42 ; H02M1/34 ; H02M7/537

Abstract:
A system and method for controlling a grid-connected reactive power compensation inverter. The system uses a combination of feedforward and feedback controls to compute a reference voltage signal based on sensor-measured voltages and currents, where the reference voltage signal is used to control the inverter switches. The disclosed method modifies a cross-couple feedforward signal used in the reference voltage calculations, where the modified cross-couple signal includes a combination of both reference and actual currents, and the modified control scheme reduces the DC-link voltage overshoot experienced during a capacitive overload event while still providing the required reactive power and maintaining grid system stability.
Public/Granted literature
- US20190237972A1 THREE PHASE INVERTER DC-LINK VOLTAGE CONTROL METHOD FOR REACTIVE POWER OVERLOAD TRANSIENT PROCESS Public/Granted day:2019-08-01
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