Analysis of Spatial Coupling Characteristics of Inertia Response Based on the Relative Gain Matrix

doi:10.12204/j.issn.1000-7229.2022.09.013

Abstract

Abstract:

With the increase of the proportion of new energy such as photovoltaic and wind power, the inertia of the receiving-end power grid is gradually diluted, and the rate of change of frequency caused by the inertia response will increase after being disturbed, which will threaten the safety and stability of frequency. There is spatial coupling between the change of frequency in the inertia response and the position of the power disturbance, which is related to the topology of the power grid. To cope with the spatial difference of the inertia response, this paper quantifies the spatial coupling relationship between generator inertia response and active power disturbance by calculating the relative gain matrix of the multi-machine system inertia response model. Simulation results show that the relative gain can intuitively characterize the influence of different positions and types of power disturbances on the generator inertia response. This method is of great significance to the analysis and control of the frequency safety and stability of low inertia systems under power accidents.

Key words: inertia response, spatial coupling characteristics, relative gain matrix

CLC Number:

TM73

ZHU Lin, TIAN Zhenglin, WANG Zhengyu, WU Zhigang, LONG Fei, YI Yang. Analysis of Spatial Coupling Characteristics of Inertia Response Based on the Relative Gain Matrix[J]. ELECTRIC POWER CONSTRUCTION, 2022, 43(9): 125-131.

Figures/Tables 8

Fig.1 Block diagram of the SFR model

Fig.2 Spatial difference of the inertia response

Fig.3 Block diagram of MIMO system

Fig.4 Relative gain matrix

Fig.5 IEEE 39-node system

Fig.6 Spatial coupling characteristics of prime mover

Fig.7 Spatial coupling characteristics of generators

Fig.8 Spatial coupling characteristics of load node

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