Review of Power Distribution Network Resilience Studies Considering Flexibility Resources

doi:10.12204/j.issn.1000-7229.2023.12.006

Abstract

Abstract:

The development trend in urban and rural power distribution networks is to gradually access a high proportion of distributed power sources. However, the various types of disturbances caused by uncertain factors, including power sources, loads, and the natural environment, cannot be ignored. Therefore, the distribution network must have the ability to resist various disturbances and recover quickly, which is called the resilience of the distribution network. Meanwhile, all types of flexible resources from the source, network, load, and storage of distribution networks can provide support for the balance between supply and demand, and improvement of toughness of the distribution network. Accurately describing the impact of various disturbance events and effectively determining the synergy of flexible resources on the source, network, load, and storage sides are key factors in studying the resilience of distribution networks. This study aims to provide insights and constructive ideas for the planning, safe and stable operation, and resilience research of new distribution networks. This study first introduces the basic concept of distribution network resilience, and analyzes various types of disturbances faced by the distribution network and the characteristics of distribution network resilience under disturbances. The study then summarizes the research progress in extreme disaster disturbances, wave disturbance modeling methods, and resilience evaluation methods. Next, the key technologies for improving the resilience of distribution networks in the pre-disturbance, mid-disturbance, and post-disturbance stages are also introduced. Finally, the key problems in the future research on distribution network resilience are discussed.

Key words: resilience of distribution network, flexibility resources, disturbance event, resilience assessment, resilience enhancement

CLC Number:

TM712

ZHANG Haichun, CHEN Wangda, SHEN Jun, CHEN Ming, ZHU Xin, GUO Yangjin, ZHAO Fengzhan. Review of Power Distribution Network Resilience Studies Considering Flexibility Resources[J]. ELECTRIC POWER CONSTRUCTION, 2023, 44(12): 66-84.

Figures/Tables 13

Table 1 Classification and impact of distribution network disturbances

Fig.1 The framework for the content of distribution network resilience

Fig.2 The process of modeling distribution network disturbances

Fig.3 Resilience assessment indexes at the static resistance level of distribution network

Fig.4 “Resilient triangle” and “resilient trapezoid” of distribution network

Fig.5 Resilience assessment indexes at the level of dynamic characteristics of distribution network

Fig.6 Resilience improvement techniques at each stage

Table 2 Resilience improvement techniques in the pre-disturbance prevention phase

Fig.7 The process of situational awareness and forecasting

Fig.8 The process of risk assessment

Table 3 Resilience improvement technologies in the resistance phase of disturbances

Table 4 Resilience improvement technologies in the recovery phase after disturbance

Fig.9 Research prospects of distribution network resilience

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