On-line Update Method for the Sensitivity Consistency Model of Interconnected Power Grid Based on Electric Power Big Data

Shuai Lian,Jianbo Wang,Rui Jiang,Bintang Li,P Siano,Q Li

doi:10.1051/e3sconf/202125601014

Abstract

Real-time fast calculation of the power flow of the interconnected power grid is an important guarantee for the reliable operation of the interconnected power grid. The topology of the interconnected power grid is complex, and the calculation of the power flow of the whole network is large and timeconsuming. The sensitivity equivalent model can effectively simplify the interconnected power grid and shorten the time of the power flow calculation of the whole network. The operating state of the power grid is constantly changing. In order to ensure the accuracy of the power flow calculation results, it is necessary to update the uniform sensitivity equivalent model in real time. Due to factors such as the vertical management system between the interconnected power grids and the principle of commercial confidentiality, it is difficult to share information between interconnected power grids in real time, and the sensitivity equivalent model cannot be updated in real time, resulting in too much error in the calculation results and no reference value. To solve this problem, this paper proposes an online update method for the sensitivity equivalent model of the interconnected power grid based on power big data to solve the problem of excessive power flow calculation errors caused by the untimely update of the equivalent model parameters, and to ensure the operational reliability of the interconnected power grid.

Highlights

With the continuous growth of the world's electric energy consumption and the innovation of high-voltage transmission technology, long-distance and large-scale grid interconnection and power transmission no longer have technical obstacles [1,2]
There are many advantages to interconnecting power grids in different regions. It can promote the consumption of renewable energy and reduce the dependence on fossil energy, reduce environmental pollution, improve social benefits, adjust the peak-tovalley difference of the load, and improve the reliability of the power grid
Are the power grids interconnected across regions, and the interconnection of transnational power grids and global transcontinental power grids has formed a scale [3,4]

Summary

Introduction

With the continuous growth of the world's electric energy consumption and the innovation of high-voltage transmission technology, long-distance and large-scale grid interconnection and power transmission no longer have technical obstacles [1,2]. It is difficult for the existing computing power to perform complete power flow calculations on the entire interconnected power grid in real time, and to analyze the weaknesses of the system, which leads to local problems. In view of the problem that the power flow calculation of the entire interconnected power grid cannot be performed quickly, based on the power system topology [5,6,7], some scholars have proposed a sensitivity consistent model (SC model) [8] to reduce the power flow calculation time.

Results

Conclusion