en.Wedoany.com Reported - The electric boiler peak shaving renovation project of Datang Lubei Power Generation Co., Ltd., undertaken by Shandong No.1 Electric Power Construction Company's Maintenance and Operation Branch, reached a key milestone on July 17, 2026, with the successful power reception of the heating transformer and the 10kV auxiliary power distribution system. The equipment operates stably, and all parameters meet standards. This marks the project's transition from the equipment installation phase to the subsystem commissioning phase, laying the foundation for subsequent electric boiler unit trial operation, full system startup, and the implementation of unit peak shaving functions.
This project is a key initiative for Datang Lubei to implement the national new power system construction, promote the "three-linkage reform" of thermal power flexibility, and enhance the supporting peak shaving capacity for new energy consumption. The project plans to construct 2×60MW main electric boilers and 2×4.5MW auxiliary electric heating devices, equipped with a 150/75-75MVA split-winding heating transformer, drawing high-voltage power from the 220kV distribution bay of the plant to build a new 10kV auxiliary power supply network. Upon operation, it can absorb surplus electricity for heat generation and storage during low grid demand periods, deeply explore the lower limit of unit peak shaving, break through the original minimum stable combustion load constraints, and simultaneously supply high-quality industrial steam externally, achieving a dual empowerment of local new energy consumption and park industrial heating.
Since the start of construction, the project team has established a special task force, focusing on the three main lines of safety, quality, and schedule, to comprehensively coordinate the entire process of civil construction, equipment installation, cable laying, protection setting, and testing and commissioning. To address technical challenges such as the 220kV booster station expansion with live crossing, main transformer installation plan, relay protection logic matching, and power interface compatibility between old and new systems, the project team organized multiple rounds of plan reviews, technical briefings, and on-site desktop simulations, systematically identifying operational risks, refining standardized operation tickets and emergency response plans, and integrating hazard identification into each process step.
This power reception operation is the most critical pre-energization process in the entire renovation project, encompassing over ten core operations including 220kV incoming line bay energization, five impact closing tests of the heating transformer body, sectionalized energization of the 10kV auxiliary bus, PT phase verification, protection vector calibration, secondary value review, and load testing. On the day of power reception, the site strictly implemented the "Two Tickets and Three Systems" management regulations for power operations, with personnel in operation monitoring, commissioning operations, construction supervision, and safety oversight each performing their duties. Throughout the process, equipment operation sounds were stable, background DCS monitoring parameters, local instrument readings, and relay protection signals were all accurate and error-free. The heating transformer showed no abnormal temperature rise or noise, and the 10kV auxiliary power system bus voltage, phase sequence, and differential protection settings were all verified as qualified, achieving zero-defect success on the first attempt.
During the previous construction phase, the project team overcame adverse conditions such as frequent rainfall, dense cross-operations, and the need for uninterrupted plant production and operation, efficiently completing tasks including booster station expansion, main transformer placement, insulated busbar installation, secondary wiring, grounding grid laying, and fire protection facility setup. The commissioning team completed preparatory work such as high-voltage tests, current loop checks, five-prevention interlock verification, and setting sheet review in advance.
The successful power reception of the heating transformer and auxiliary system has opened the power supply channel for the electric boiler body and all auxiliary systems. Subsequent key tasks will include electric boiler unit live trial operation, feedwater system linkage commissioning, steam pipeline purging, and full system linkage startup tests. The participating team will continue to advance the remaining construction tasks to ensure the project is completed and put into operation on schedule.
