Review on Evaluation and Promotion Methods of Carrying Capacity for Distributed Generation and Electric Vehicles in Distribution Network

doi:10.12204/j.issn.1000-7229.2022.09.002

Abstract

Abstract:

The new power system with new energy as the major energy resources has become the development direction of the future power grid. In the distribution system, it is manifested in the high penetration of distributed generation (DG), e.g., photovoltaic, wind power and electric vehicles (EVs). The carrying capacity of the distribution system for DG and EV is of great significance to the planning of the system. This paper firstly analyzes and summarizes the theoretical basis for evaluating the carrying capacity of distribution systems for DG and EV from four perspectives: the modeling method for DG and EV uncertainty, the site selection strategy of DG and EV charging pile/station, the evaluation index of distribution system’s carrying capacity, and the carrying capacity evaluation method. Then the paper analyzes the key technologies for improving the carrying capacity of the distribution system from the four aspects of source, network, load and storage. Finally, combined with the development trend and characteristics of China's new power system, the research on the carrying capacity of distribution systems is prospected. This review provides a useful reference for the planning of large-scale distributed new energy and new loads in distribution systems.

Key words: distribution system, distributed generation, electric vehicle, carrying capacity evaluation, carrying capacity improvement

CLC Number:

TM715

WANG Ting, CHEN Chen, XIE Haipeng. Review on Evaluation and Promotion Methods of Carrying Capacity for Distributed Generation and Electric Vehicles in Distribution Network[J]. ELECTRIC POWER CONSTRUCTION, 2022, 43(9): 12-24.

Figures/Tables 6

Table 1 The constraint index used to evaluate the carrying capacity

Table 2 Voltage fluctuation limits for distribution systems up to and including 35 kV

Table 3 Allowable values of the total harmonic distortion rate and the voltage content rate of each harmonic at different voltage levels

Fig.1 Carrying capacity promotion technology of distribution system

Fig.2 Output curve of PV and wind power in a certain place

Fig.3 Carrying capacity promotion technology based on voltage regulation for distribution system

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