Abstract: In the face of the integration of a large number of distributed photovoltaics, high load charging piles, and energy storage elements, a real-time monitoring technology solution for flexible interconnection of substations based on master-slave attribute intelligent terminals is proposed to achieve the goals of source load balancing, inter-site load balancing, improving substation power supply reliability, and enhancing substation control response speed in the distribution network. The intelligent fusion terminal based on the master-slave attribute communicates with the flexible interconnection device through optical fiber for local area network networking, which can greatly improve the response speed of local control in the substation. The intelligent fusion terminal operating in the main mode can collect and aggregate all the electrical quantity data in the substation, and based on the built-in substation energy control App strategy algorithm, it can achieve local balance management of the source and load power in the substation. At the same time, relying on the flexible control of the flexible interconnection devices within the system, it can realize functions such as dynamic capacity expansion of the substation, power outage transfer, and energy regulation in the substation. It has solved problems such as heavy overload in the substation and regional power outages due to faults, and has practical engineering application value.

    Key words: distribution network; intelligent terminal; flexible interconnection; power interconnection.