Zhi Tong Cai Jing·2025-11-10 03:28Core Viewpoint - The "source-network-load-storage" integrated model is accelerating implementation across the country as part of the national energy structure transformation and "dual carbon" goals, with the Hengshan Science City incremental distribution pilot project by China Gas's Hengyang Zhongran Energy becoming a typical example of regional comprehensive energy service models [1][5]. Group 1: Project Overview - Hengyang Zhongran is the sole distribution and sales electricity operator in the 26.5 square kilometer pilot area of Hengshan Science City, holding exclusive rights for electricity and centralized heating [3]. - The company is responsible for the investment, construction, and operation of the incremental distribution network, extending to comprehensive energy services including photovoltaic, energy storage, charging facilities, and distributed gas energy systems [3]. - The existing infrastructure includes one 110kV substation with a capacity of 63MVA, 5.74 kilometers of 110kV overhead lines, and a total distribution transformer capacity of 99,450 kVA, supporting diverse load demands in the region [3]. Group 2: Technological Advancements - The energy storage project associated with the 110kV substation was officially put into operation last year, achieving a key breakthrough in the storage segment with an overall efficiency of approximately 90% and annual savings of 3.3 million yuan [4]. - The system operates on a "two charge, two discharge" strategy, effectively managing peak and off-peak electricity loads, thereby enhancing grid stability and reliability [4]. Group 3: Economic and Environmental Impact - The integrated model significantly improves the grid's capacity to accept intermittent power sources like distributed photovoltaics, reducing voltage fluctuations and overload risks [5]. - Economic benefits include optimized energy dispatch strategies that balance electricity loads and control overall electricity costs, avoiding spikes due to peak pricing [5]. - The project promotes the use of digital and information technologies, advancing smart grid construction and enhancing automation and intelligent management of the grid [7]. - Environmental benefits are realized through the large-scale promotion of photovoltaic generation and storage, leading to reduced fossil fuel consumption and greenhouse gas emissions, supporting green and low-carbon development [7]. Group 4: Future Prospects - The project exemplifies the deep integration of incremental distribution reform and comprehensive energy services, providing a practical model for other industrial parks and new urban development areas [7]. - With the anticipated decline in costs for photovoltaics and energy storage, along with increased policy support, such integrated models are expected to be promoted in more regions [7].