Analysis of Power System Flexibility Regulation Adequacy Based on Mathematical Morphology

doi:10.11930/j.issn.1004-9649.202403040

Abstract

Abstract:

As the proportion of renewable energy in the power system increases, the demand for flexible regulation in the power system also increases. Whether the flexibility resources in the system can meet the regulation demand has become an urgent problem to be solved in the construction process of the new power system. Based on the theory of morphological decomposition, a model for analyzing the adequacy of flexible regulation capacity of the power system considering the characteristics of energy storage is established. Two different operators are used for morphological decomposition, and the results of the decomposition of the system's flexible regulation capacity adequacy are obtained from the net load curve of the power system. Then, for different flexible regulation demands, the flexible regulation capacity adequacy of flexible resource systems with different installed capacities is calculated. Based on the actual operating data of a provincial power system, the effectiveness of the proposed method is verified, and the minimum installed capacity of energy storage required to meet the adequacy of full system flexible regulation capacity is calculated.

Key words: mathematical morphology, the adequacy of flexible regulation capacity, regulation value

Feng ZHANG, Hengjian FAN, Hui DENG, Le FANG, Ziqing ZHOU, Zhiyi LI. Analysis of Power System Flexibility Regulation Adequacy Based on Mathematical Morphology[J]. Electric Power, 2025, 58(3): 43-54.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.202403040

https://www.electricpower.com.cn/EN/Y2025/V58/I3/43

Figures/Tables 8

Fig.1 Overall approach for analyzing the adequacy of flexible regulation capability in power system

Fig.2 Schematic diagram of system flexibility regulation demand

Table 1 Installed capacity of various types of units

机组类型		装机容量/GW
风电		5.0
光伏		25.0
燃煤		65.0
燃气		2.5

Fig.3 Schematic diagram of morphological decomposition considering two element structures

Fig.4 Morphological decomposition results of residual net load curves

Fig.5 Frequency regulation demand under different renewable energy penetration rates

Fig.6 Probability of insufficient ramping capability in multiple scenarios

Fig.7 Adequacy of flexible regulation capacity in multiple scenarios

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