Matrix Converter Power Quality Compensation Without Electrolytic Capacitors

The patent removes electrolytic capacitors from the power quality compensation system entirely, replacing them with a matrix converter topology that uses only inductors and switches. This extraction of the unreliable capacitor component directly resolves the reliability issue while maintaining the reactive power compensation function through the matrix converter's switching operation.

The patent replaces expensive, failure-prone electrolytic capacitors with simpler, more reliable inductive components and solid-state switches. The inductors used in the matrix converter have significantly longer service lives and higher reliability in harsh environments, effectively substituting short-living capacitor components with durable alternatives.

The matrix converter is designed to perform multiple power quality compensation functions simultaneously - reactive power compensation, harmonic mitigation, voltage sag/swell correction, unbalance compensation, and fluctuation stabilization. This multi-functional approach allows a single device to address all identified power quality issues effectively, rather than requiring separate systems for each function.

The patent employs model predictive control with a cost function that dynamically adjusts switching states to optimize performance across varying operating conditions. The controller continuously evaluates multiple future states and selects the optimal switching configuration to mitigate harmonics and maintain power quality, enabling adaptive response to changing load conditions and grid disturbances.