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 2):
The method according to  claim 1  wherein computing three phase reference voltage signals includes:\n processing the grid voltage signals to provide nominal grid voltage and frequency values and an instantaneous phase angle, and direct and quadrature voltage components; \n computing a DC-link voltage adjustment in a proportional-integral (PI) controller based on the DC-link voltage signal and a DC-link reference voltage, and calculating a direct reference current based on the DC-link voltage adjustment; \n transforming the grid-inverter current signals to provide direct and quadrature current components; \n computing a direct current adjustment in a PI controller based on the direct reference current and the direct current component, and computing a quadrature current adjustment in a PI controller based on the quadrature reference current and the quadrature current component; \n combining the direct current adjustment with the direct voltage component in the direct voltage summer, and combining the quadrature current adjustment with the quadrature voltage component in the quadrature voltage summer; \n computing a direct feedforward term and cross-coupling it to the quadrature voltage summer, and computing a quadrature feedforward term and cross-coupling it to the direct voltage summer; and \n transforming outputs of the direct voltage summer and the quadrature voltage summer to 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: none
- Component Type: 0
- Foreign Priority: False
- Related Applications: ['13100933', '12884822', '14225622', '13498109', '15783057']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.8297305250704213
- 35 USC 102 Novelty (BERT): 0.4789629535860433
- Combined Prediction Score: 0.7946537679219835
- Mean Citation Score: 210.949814
- Max Citation Score: 215.4389
- Similarity Product: 170.31156126753686

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

Dataset: test