A collaborative real-time digital simulation method for distribution network and transmission network

Abstract

The present invention relates to a distribution grid and transmission grid collaborative real-time digital simulation method. The method comprises the following steps of selecting decoupling points to decouple a power grid, and splitting the power grid into a main transmission grid and a plurality of distribution grids; performing time-domain simulation on the main transmission grid by utilization of a real-time digital simulation device, wherein the simulation step size is less than 0.1 ms, and an output result of each simulation step is an instantaneous value; performing parallel phasor-domain simulation on the plurality of distribution grids by utilization of distribution grid software, wherein the simulation step size is greater than 20 ms, and an output result of each simulation step is a phasor; and performing communication between the real-time digital simulation device and the distribution grid simulation software, executing a timing interruption step periodically until the simulation is ended, and achieving forward control and reverse control of the main transmission grid and the distribution grids. Compared with the prior art, the method has the characteristics that economic feasibility is high, simulation results are accurate, simulation efficiency is high, and adaptability is wide.

Description

technical field [0001] The invention relates to the field of real-time digital simulation of power systems, in particular to a collaborative real-time digital simulation method of a distribution network and a transmission network. Background technique [0002] The traditional power system is composed of power generation, power transmission, power distribution, power consumption and other links, and has the characteristics of vertical system structure and unidirectional power flow transmission. Such structural characteristics make the simulation of the transmission network and the distribution network independent in the simulation of the traditional power system. A comprehensive model of constant impedance, constant current and constant power is adopted, that is, the ZIP model; when simulating the distribution network, the transmission network is simplified as Thevenin equivalent. [0003] However, the structural characteristics of the smart grid have undergone great changes...

AI Technical Summary

Problems solved by technology

These systems are based on specialized software and hardware architectures, which are very expensive, and the cost of large-scale simulation is very huge

This makes the economic feasibility of collaborative real-time digital simulation of distribution network and transmission network based on these platforms very poor

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