6 results about "Infinite bus" patented technology

The application provides an inverter droop control method and system, electronic equipment and a readable storage medium. The method comprises: generating an initial curve family of reactive power and voltage on the inverter side based on an established single-machine infinite bus (SMIB) model; screening the generated initial curve family according to a preset power system static stability criterion to obtain a stable region atlas capable of meeting the stable operation of the SMIB model; setting various different droop control curves in the stable region atlas; and determining a droop coefficient range based on the intersection between the droop control curves and the stable region atlas, and performing reactive power-voltage droop control based on the droop coefficient range. The application can accurately identify the stable domain of the reactive power-voltage droop coefficient of the network type inverter in advance and offline by constructing the SMIB model and coupling the inherent mathematical relationship and strict stability criterion.

The invention provides an inverter droop control method and system, electronic equipment and a readable storage medium, and the method comprises the steps: generating an initial curve family of reactive power and voltage of an inverter side based on an established single-machine infinite bus (SMIB) model; screening the generated initial curve family according to a preset power system static stability criterion to obtain a stable region map capable of meeting stable operation of the SMIB model; setting various different droop control curves in the stable region map; and determining a droop coefficient range based on an intersection condition between the droop control curve and the stable region map, and performing reactive power-voltage droop control based on the droop coefficient range. According to the method, the SMIB model is constructed, and the internal mathematical relationship and the strict stability criterion of the SMIB model are coupled, so that accurate identification of the stability domain of the reactive power-voltage droop coefficient of the grid-forming inverter can be completed in a preposed and offline manner.

This invention discloses a method, apparatus, electronic device, and storage medium for determining node voltages in an electromechanical transient network containing an infinite bus, belonging to the field of power system electromechanical transient simulation technology. The method includes: obtaining the node admittance matrix of the power system to be simulated and the injected current of each grid-connected device except the infinite bus; solving the equivalent impedance matrix based on the node admittance matrix to obtain the self-impedance of the infinite bus and its mutual impedance with each node; calculating the total equivalent voltage drop formed at the infinite bus by each grid-connected device in conjunction with its injected current and corresponding mutual impedance; deriving the injected current of the infinite bus based on the infinite bus voltage phasor, self-impedance, and total voltage drop; and substituting the injected current of the infinite bus and the injected currents of other grid-connected devices into the node admittance matrix to solve the network equations to obtain the voltages of each node. The implementation of this invention can solve the problem of network node voltages deviating from preset standards during transient processes in existing technologies.

The application discloses a converter control method and device considering AC side phase angle feedback and a storage medium, and belongs to the field of novel power grid formation control. The method comprises the following steps: for a DC-AC power converter, considering the connection of the DC-AC power converter with an infinite bus or a dynamic center inertia (COI) power grid, a converter model containing explicit expressions of energy dynamics, DC links, LC output filters, transmission lines and the like is established, and a closed-loop dynamic equation under a hybrid angle control (HAC) strategy is determined; based on the model and the control strategy, the existence, stability and boundedness of equilibrium points of a closed-loop system are analyzed, and corresponding parameter conditions are given; considering the safety constraints of the power converter, a current limiting control compatible with the hybrid angle control (HAC) is designed, and the stability thereof is analyzed; the implementation method of the hybrid angle control (HAC) in actual application is researched and designed, the robustness thereof is analyzed, behaviors of the hybrid angle control (HAC) under different working conditions are analyzed, and numerical examples are used for verification.

The invention relates to a reactive boundary calculation method and device, computer equipment, a storage medium and a program product. The method comprises the following steps: determining a first initial boundary of a converter in a wind power plant according to power equipment parameters of a wind turbine generator at a current operating point in the wind power plant; determining a second initial boundary of the wind power plant according to a single-machine infinite bus system corresponding to the wind power plant; and determining the reactive power boundary of the wind power plant according to the first initial boundary, the second initial boundary and the preset corresponding relation between the voltage and the reactive power output of the wind power plant, thereby comprehensively considering the current transformer capacity constraint, the node voltage constraint and the power flow equation solution constraint when the reactive power boundary of the wind power plant is calculated. And the accuracy of reactive capacity evaluation of the wind power plant is improved.

This application relates to a dynamic intermittent control method, apparatus, device, storage medium, and program product. The method includes: acquiring the expected grid connection value of a single-unit infinite bus power network system and the actual state value of the single-unit infinite bus power network system; outputting intermittent control signals based on the expected grid connection value and the actual state value to control the operation of an actuator; wherein the intermittent control signals are used to indicate the frequency of operation through control commands, so that the actuator remains silent when the single-unit infinite bus power network system is in a stable equilibrium range. This application can reduce the frequency of control command operations, allowing the actuator to remain silent when the system is in a stable equilibrium range, activating and applying effective control only when necessary, thereby reducing mechanical and electrical wear of the mechanism and significantly extending the service life of the equipment.