T/JSJXXH 014-2023 Active

Scope: This document specifies the technical requirements for the commissioning phase of fixed offshore substations after installation, and sets out the specific requirements for electrical commissioning, mechanical equipment commissioning, pipeline system commissioning, and ventilation system commissioning. This document applies to the commissioning work of fixed offshore substations with an AC voltage range of 110kV to 220kV. Main technical content: When offshore wind farms are located far from the shore, in order to reduce power loss during transmission, it is necessary to build offshore substations to step up the output voltage of wind turbines and send it to the onshore control center via submarine cables. Offshore substations are the core of the entire wind farm and a crucial link in the process of offshore wind grid connection. They contain many important equipment with specific functions and involve multiple professional construction processes. The commissioning of various professional systems in offshore substations is a systematic and complex project, which is subject to many external factors such as the commissioning environment, temperature, and humidity. During the commissioning process, it is necessary to establish a reasonable commissioning sequence to ensure that each process meets the requirements before proceeding to the next process, so as to ensure that the commissioning results of offshore substations meet product requirements. The control requirements for the commissioning of various professional systems in offshore substations mainly include the commissioning of primary electrical equipment, secondary electrical equipment, diesel generators, deck machinery, cranes, high-pressure water mist pipeline systems, water supply and drainage systems, and ventilation system adjustments, etc.