Guizhou Power Grid has applied for a patent for a modular control method for flexible interconnection devices in high-density communities, aimed at reducing output harmonic content and enhancing power density. The patent application, titled “Modular Control Method, System, Device, and Storage Medium for a Flexible Interconnection Device in High-Density Communities,” was filed with the National Intellectual Property Administration on October 2025, and its publication number is CN121566592A.
The patent abstract indicates that this invention pertains to the field of flexible interconnection technology for distribution networks. It focuses on obtaining the load characteristics and expansion needs of community distribution networks. By designing a series-parallel combination architecture based on a modular topology, a multi-module collaborative operation model is established to determine the voltage and current distribution relationships between power modules and construct a coupling characteristic matrix between the modules.
The use of silicon carbide devices for high-frequency power conversion is proposed, along with a design for a multi-level conversion unit topology. This includes defining the switching sequences and modulation strategies to reduce output harmonic content and increase power density. A system state space model is constructed, with a defined prediction time domain and control time domain to optimize the control inputs for each module through rolling optimization calculations. This approach addresses technical challenges such as limited capacity, low power density, poor scalability, and circulating currents in the expansion of distribution networks in high-density communities.
According to data from Tianyancha, Guizhou Power Grid Co., Ltd. was established in 1994 and is located in Guiyang. The company primarily engages in the production and supply of electricity and heat. It has a registered capital of 1,998,282,461.46 RMB. Analysis from Tianyancha indicates that the company has invested in 39 enterprises, participated in 5,000 bidding projects, has 6 trademark records, 5,000 patent records, and holds 146 administrative licenses.
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