2 results about "Reactive power theory" patented technology

The application discloses a kind of adaptive compensation method and related device for three-phase current imbalance and harmonic, belong to power system technical field;The method is based on the instantaneous reactive power theory and the quick separation and instruction generation of fundamental wave positive sequence component and unbalance compensation component of sliding discrete fourier transform;Multi-objective model predictive current control with embedded repeated learning correction mechanism to achieve high-precision tracking of compensation current instruction and system circulation suppression;Multi-objective weight factor online dynamic adjustment mechanism based on fuzzy reasoning, according to the adaptive balance between the control emphasis of tracking accuracy, circulation suppression and switching loss according to the real-time operating state of the system;And, adaptive closed-loop management architecture based on the above module cooperation, drive active power electronic converter to generate compensation current, realize the comprehensive management of three-phase imbalance and harmonic and global optimization of system performance.

This invention belongs to the field of converter control technology, specifically disclosing a converter grid-connected harmonic suppression method and system based on the TD3 algorithm and instantaneous reactive power theory, including the following steps: acquiring three-phase current signals; and obtaining observed state variables from the three-phase current signals based on instantaneous reactive power theory and the TD3 algorithm. S t ; Observe the state quantity S t Input the trained TD3 agent and obtain action values. a t ; For action values a t Coordinate transformation and SVPWM processing are performed to obtain a modulation signal; the modulation signal is then applied to the grid-connected converter. This invention has the advantages of high dynamic response speed, wide harmonic suppression bandwidth, and strong adaptability, and can effectively solve the dynamic suppression problem of harmonic pollution in new energy grid-connected scenarios.