Design method of real-time simulation solver of active power distribution network on basis of FPGA

Abstract

Disclosed is a design method of a real-time simulation solver of an active power distribution network on basis of an FPGA. The method comprises the steps of offline preprocessing and online solving. During offline preprocessing, a column approximate minimum degree algorithm is adopted for processing a node admittance matrix; the address vectors of current and the address vectors of current voltageare prestored; an LU decomposition method is adopted for decomposing the node admittance matrix; the starting time of each sub-task in the previous substitution process and the back substitution process is prestored. During online solving, the simulation starting time is set; the simulation time is advanced by one step length; information initialization of each sub-task and addressing sorting ofthe current vectors are completed; when solving begins, a starting timer of each processing unit is initialized according to the prestored starting time of the corresponding sub-task; solving in the previous substitution process is completed, and an intermediate solution vector is generated; solving in the back substitution process is completed, and a final solution vector is generated after addressing sorting; whether or not the simulation time reaches the final simulation moment is determined. By means of the method, while the solving precision and speed are ensured, sparse linear equationsare solved accurately and efficiently.

Description

Technical field [0001] The invention relates to a real-time simulation solver for an active distribution network. In particular, it relates to a design method of an active distribution network real-time simulation solver based on FPGA. Background technique [0002] In recent years, with the continuous development and application of distributed power generation and microgrid technology, flexible AC power distribution technology, and smart power distribution technology, the distribution network has transformed from a traditional passive network to a multi-source complex system. With the addition of many new elements and technologies, it becomes more complicated, and faces greater challenges in planning and design, operation scheduling, control protection, simulation analysis, etc. Therefore, it is necessary to use accurate and efficient transient simulation to understand Operation mechanism and dynamic characteristics of active distribution network. [0003] Different from offline ...

AI Technical Summary

Problems solved by technology

At the same time, as the most time-consuming part of real-time simulation, the solution speed and solution accuracy of its linear equations solving module seriously restrict the improvement of the simulation performance of the real-time simulator

Traditional commercial simulators are expensive and do not support secondary development. In contrast, the design of high-performance solvers for real-time simulation of active distribution networks based on FPGA (field programmable gate array) provides a new idea

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