Modelling and Control of Hybrid Energy Storage System with Fast Frequency Response in New Power System

doi:10.12204/j.issn.1000-7229.2022.08.002

Abstract

Abstract:

In order to study the influence of hybrid energy storage system with fast frequency response on the dynamics of the new power system, and find the best control strategies for different scenarios, a generalized dynamic model of the hybrid energy storage system is proposed. On the basis of this model, the PI, H∞ and sliding mode controllers for the hybrid energy storage system consisting of battery and flywheel energy storage are designed. A case study serves to compare the different control strategies of the hybrid energy system. The results show that the combination of battery with H∞ control and flywheel with sliding mode control has the best frequency support capability.

Key words: energy storage system, hybrid energy storage system, robust control, optimal control

CLC Number:

TM910

ZHENG Hua, ZHAO Zhiqiang, LIU Siwei, WANG Dongmiao, WEI Nan, WANG Shiming. Modelling and Control of Hybrid Energy Storage System with Fast Frequency Response in New Power System[J]. ELECTRIC POWER CONSTRUCTION, 2022, 43(8): 13-21.

Figures/Tables 8

Fig.1 Structure of the VSC-based ESS

Fig.2 PI control for ESS

Fig.3 H∞ control for ESS

Fig.4 Modified New England system with high penetration rate of new energy

Table 1 Parametevs of the renewable energy power sources for modified New England system

Table 2 Parametevs of HESS

Fig.5 Dynamic frequency evolution characteristics of modified New England system

Table 3 Monte Carlo experimental evaluation of frequency dynamics in the improved New England system

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