As of the end of June, the installed capacity of distributed photovoltaic power generation connected to the Hebei power grid has surpassed 25 gigawatts, reaching 25.0253 GW. This figure represents a significant 27% of the region's total power generation capacity. The large-scale integration of these distributed new energy sources is accelerating the transformation of the distribution network away from the traditional one-way radial power supply model. It is fostering the comprehensive development of a new type of power distribution system characterized by source-load interaction and coordination between main and distribution grids, marking a notable achievement in the grid's green transition.
Distributed photovoltaics are a crucial component of a clean, low-carbon energy system and a key link in building a new type of power system. Since the start of the 14th Five-Year Plan period, State Grid Hebei Electric Power Company has consistently strengthened the service and support capabilities of the Hebei grid. The company has focused on resolving bottlenecks across the entire chain of distributed PV grid connection, consumption, dispatching, and operation. During this period, Hebei's grid-connected distributed PV capacity has increased by 19.36 GW, demonstrating robust momentum in the development of green energy.
Strategic Planning and Scientific Development
State Grid Hebei Electric Power Company conducts regular rolling analyses of the available hosting capacity of the distribution network. This allows for precise identification of grid acceptance space across different regions, scientifically guiding and supporting the layout of distributed photovoltaics in areas with sufficient grid capacity. This approach helps avoid consumption bottlenecks caused by haphazard construction. The company has also introduced supporting technical specifications for distributed PV grid connection and standard construction models, unifying business processes and streamlining procedures. These efforts continuously improve the quality and efficiency of grid connection services for PV projects, ensuring new energy projects are connected to the grid in a standardized and efficient manner.
Strengthening Grid Infrastructure
Investment in the distribution network has been consistently increased to solidify the hardware foundation for new energy integration. Since the 14th Five-Year Plan began, the average annual investment in Hebei's medium and low-voltage distribution network has exceeded 7 billion yuan. Focusing on critical issues such as weaknesses in rural power grids and equipment overload caused by reverse power flow from photovoltaics, the company has implemented a series of projects, including the upgrading of village-level grids. Systematic enhancements to lines, distribution transformers, and other hardware components have significantly boosted the distribution network's overall capacity to accommodate distributed photovoltaics.
Technological Innovation and Demonstration Projects
Leveraging technological innovation to address the challenges of integrating distributed new energy, the company is creating diverse microgrid demonstration models. To tackle problems like significant power fluctuations in new energy-rich areas and poor voltage quality at grid edges, State Grid Hebei Electric Power Company is accelerating the practical application of microgrid technology. It has successfully completed projects such as the province's first megawatt-level Pingshan Yingli microgrid and a ten-megawatt-level microgrid in Shexian County, Handan. These replicable and scalable demonstration projects effectively smooth out fluctuations in PV power output. They not only enhance power supply reliability in remote villages but also fully tap into the local potential for consuming solar power on-site. These initiatives provide valuable practical examples for the construction of the new type of distribution network.
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