Multi-energy-flow power flow calculation method and system for regional distributed energy system

Abstract

The invention discloses a multi-energy-flow power flow calculation method and system for a regional distributed energy system, and belongs to the technical field of power flow calculation. The methodcomprises the steps of determining an iterative computation process of a simulation computation model and constraints of initial value selection of each operation mode; generating a sample training set; training the sample training set to generate a classifier; taking a maximum value of a calculation result as an initial value of power flow alternate iterative calculation of the simulation calculation model; and inputting the initial value into the simulation calculation model to perform power flow iterative alternate calculation, and outputting a power flow calculation result if the power flow calculation result is converged. According to the invention, the randomness of initial value selection is reduced, the convergence degree of the initial value is evaluated through the convergence degree prediction model, the probability of power flow calculation convergence is improved, the initial value can be rapidly selected, the problem that the convergence degree calculation time is long inmulti-energy-flow power flow alternate iteration is avoided, and the power flow calculation time of a complex power flow calculation model can be shortened.

Description

technical field [0001] The present invention relates to the technical field of power flow calculation, and more specifically, to a multi-energy flow power flow calculation method and system for a regional distributed energy system. Background technique [0002] Distributed integrated energy system (Distributed Integrated Energy System, DIES) is an effective way to meet the needs of regional electricity, heat and cold, realize the comprehensive management of various energy sources, economic dispatch and improve energy utilization rate. A major trend of DIES, and the power flow calculation of DIES is the basis of various analysis calculations. Existing multi-energy flow calculation methods generally fully refer to power system construction, including heating network-grid alternate iterative algorithms and joint calculation methods. In the heating network model, the node flow balance, loop pressure drop balance and heat balance equations are usually established with reference ...

AI Technical Summary

Problems solved by technology

However, due to the non-linearity of hydraulic and thermal power in the traditional heating network model, each sub-model needs to be solved iteratively, and the calculation is complicated. On the other hand, the improper selection of the initial value when applying the cow-pull method is likely to cause large errors and slow calculation speed.

Images