PATENT CLAIM ANALYSIS

Application Number: 16164361
Application Type: Utility
Filing Date: 2018-10
Publication Date: 2019-08
Patent Classification: ["363", "056120"]

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.

Claim (Index 1):
A method for controlling a grid-connected three phase reactive power compensation inverter to deliver a required amount of reactive power to a grid while limiting an internal DC-link voltage transient overshoot, said method comprising:\n receiving, by an inverter controller, inputs including three phase grid voltage signals, a DC-link voltage signal, and three phase grid-inverter current signals from sensors, and a quadrature current reference signal from a master controller; computing, using a processor in the inverter controller, three phase reference voltage signals based on the inputs, where the reference voltage signals are computed using real-time control calculations in a direct-quadrature reference frame including cross-couple feedforward terms wherein reference and actual components of direct current are combined and multiplied by an angular frequency and an inverter filter inductance and then cross-coupled to a quadrature voltage summer, and reference and actual components of quadrature current are combined and multiplied by (\u22121) and the angular frequency and the inverter filter inductance and then cross-coupled to a direct voltage summer; and controlling duty cycles of a plurality of inverter switches, using a pulse-width modulation (PWM) module in the inverter controller, based on the three phase reference voltage signals.

Metadata:
- Claim Count in Document: 42.0
- Percentile: 97.0
- Lexical Diversity: 1.74194
- Patent Class: 363.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['13100933', '12884822', '14225622', '13498109', '15783057']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.8124355183382254
- 35 USC 102 Novelty (BERT): 0.4755658347759143
- Combined Prediction Score: 0.7787485499819943
- Mean Citation Score: 210.949814
- Max Citation Score: 215.4389
- Similarity Product: 172.2721109162569

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 0
- Claim Label 112: 1
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test