Abstract
As a large number of distributed generations are connected to the distribution system, research on the hosting capacity is actively being conducted. In particular, various methods, such as smart inverter functionality, co-located energy storage systems (ESS), and the use of on-load tap changers (OLTC), have been proposed to improve the hosting capacity. In this paper, a method to improve the hosting capacity by utilizing a solid-state transformer (SST) and its unique control capability is proposed. Lastly, the proposed method is verified in the distribution system of the Republic of Korea using the OpenDSS program.
Highlights
Many distributed generations (DGs) are interconnected to the distribution system from all over the world
It is very important to know the limit of DGs that can be interconnected to the distribution system without degrading the power quality
Hosting capacity refers to the maximum capacity of DG that can be interconnected to the distribution system without additional reinforcement [16]
Summary
Many distributed generations (DGs) are interconnected to the distribution system from all over the world. It is very important to know the limit of DGs that can be interconnected to the distribution system without degrading the power quality This is called the hosting capacity, which many researchers have worked to evaluate. Smart inverters can control the active and reactive power to regulate power system voltage for extending the hosting capacity. The authors of [4] evaluated the effectiveness of active and reactive power controls of inverters for an increased hosting capacity. The authors in [7] proposed a feeder voltage profile design algorithm to achieve a specified voltage profile and hosting capacity enhancement by placing voltage control devices like CBs. OLTC and reactive power sources focus on only regulating the power system voltage.
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