Risk Assessment Method for Integrated Transmission–Distribution System Considering the Reactive Power Regulation Capability of DGs

Qi Wang, Dasong Sun, Jianxiong Hu, Yi Wu, Ji Zhou and Yi Tang
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Qi Wang: School of Electrical Engineering, Southeast University, Nanjing 210096, China
Dasong Sun: School of Electrical Engineering, Southeast University, Nanjing 210096, China
Jianxiong Hu: School of Electrical Engineering, Southeast University, Nanjing 210096, China
Yi Wu: State Grid Jiangsu Electric Co. Ltd., Nanjing 210000, China
Ji Zhou: National Electric Power Dispatching and Control Center, State Grid Corporation of China, Beijing 100031, China
Yi Tang: School of Electrical Engineering, Southeast University, Nanjing 210096, China

Energies, 2019, vol. 12, issue 16, 1-14

Abstract: High distributed generation (DG) penetration makes the traditional method of equalizing the distribution power system (DPS) to the PQ load bus in the risk assessment of the transmission power system (TPS) no longer applicable. This paper proposes a risk assessment method for an integrated transmission–distribution system that considers the reactive power regulation capability of the DGs. Based on the DG’s characteristics and network constraints, the regulation capacity is mapped to the boundary buses of the distribution networks. Coordinating the relationship between reactive power and active power, the utilization of the regulation capacity is maximized to reduce the load shedding in the fault analysis of the TPS. Simulation results in the integrated transmission–distribution system illustrate that the effective use of the regulation capacity of the DPS can reduce the risk of the TPS. The method can be applied to the reactive power sources planning and dispatching of power system.

Keywords: risk assessment; distributed generation; reactive power; integrated transmission–distribution system (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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