4 results about "Transient energy function" patented technology

This invention relates to the field of multi-source coordinated control technology in distribution networks, and discloses an automatic switching method and system for multiple power sources in a distribution network. The switching method includes: dynamically modeling the transient power flow of the main power source and distributed power sources in a multi-source distribution network, and performing dynamic response analysis of topology changes; evaluating the system energy obtained from the dynamic modeling using the transient energy function method, calculating the kinetic and potential energy components before and after the switching, and determining the system energy balance state based on the comparison result of the energy difference and the critical energy threshold; and executing phased soft switching control based on the energy evaluation result, through sequential control logic of synchronization stage, power sharing stage, and switching transition stage, and performing gradual power transition between the main power source and distributed power sources according to a predictive control algorithm. This invention achieves real-time power flow reconstruction under topology changes, energy-driven switching decisions, and smooth power transition, reducing voltage fluctuations and transient impacts caused by switching.

This invention discloses a method, device, equipment, and storage medium for inertia regulation of a grid-type converter, belonging to the field of power electronic grid-type converter control technology. The method includes: establishing a second-order equivalent transient model; introducing transient compensation into the active power control loop, processing the second-order equivalent transient model to obtain a transient-compensated second-order equivalent transient model; then constructing a transient energy function under compensation based on this model; constructing a transient recovery time based on the transient energy function; adjusting historical inertia parameters based on a target parameter prediction model, under constraints of angular frequency deviation and angular frequency change rate, with the goal of minimizing the transient recovery time, to obtain updated inertia parameters; and applying the updated inertia parameters to the virtual synchronous machine oscillation control loop. The technical solution provided by this invention can improve the accuracy and simplicity of inertia regulation, shorten the transient recovery time under strong disturbances, and improve the stability of the power system.

This invention discloses a distributed energy storage collaborative scheduling system for power systems, relating to the field of distributed energy storage optimization technology. It achieves quantitative assessment of the transient stability of the distribution network through transient energy functions, quantifies the system stability margin, and converts it into energy storage output commands. By constructing a two-dimensional hierarchical scheduling mechanism, it divides energy storage levels based on electrical distance and power sensitivity coefficients, and differentiates the allocation of near-end damping output and far-end balancing output to achieve optimal allocation of spatial resources. Simultaneously, it establishes a multi-timescale hierarchical control system, performing hierarchical control based on the response speed of energy storage devices, fully leveraging the advantages of fast and slow energy storage characteristics, and covering the entire transient process of a fault. Furthermore, it adopts a fully closed-loop adaptive scheduling architecture, with the energy storage cluster providing real-time feedback on its operating status, driving the system to dynamically adjust scheduling strategies until the distribution network returns to steady-state operation.

The application provides a kind of energy router coordination method and system for new energy station voltage ride-through, belongs to the field of power electronics and new energy grid-connected control technology, its method includes, first, the voltage of grid-connected point is collected, the dynamic threshold set is calculated and the hysteresis logic is introduced;Then realize seamless switching of three operating modes according to the threshold, reconstruct power unit;Then decompose voltage and current sequence components, generate positive and negative sequence current instructions and superimpose virtual impedance limiting;Fusion deep reinforcement learning and transient energy function, adaptive setting control parameters;Finally, combined with related instructions, state and parameters, execute multi-port energy interaction dynamic coordination, improve the voltage ride-through performance of new energy station.The application realizes new architecture through dynamic multi-modal control+coordination current limiting support+intelligent adaptive parameter tuning+multi-port collaboration, significantly improves the ride-through performance of new energy station under grid voltage sag / fault, takes into account grid stability and equipment safety, has significant innovation and practical value.