T/HJN 001-2023 Active

Scope: This document specifies the basic principles, project approval, project design, project construction, project commissioning, and project acceptance for the construction of new and expanded all-vanadium flow battery energy storage power stations. This document applies to new and expanded all-vanadium flow battery energy storage power stations with a capacity of 100kW or more. All-vanadium flow battery energy storage power stations with a capacity of less than 100kW can refer to and implement this document for guidance. Main technical content: 1. The single-point grid-connected voltage level of all-vanadium flow battery energy storage power stations can be preliminarily selected based on the installed capacity, as follows: - For 100kW to 1000kW (inclusive), it can be connected to a 0.4kV grid; - For 500kW to 6000kW (inclusive), it can be connected to a 6/10/20kV grid; - For power stations with a capacity of 6000kW or more but less than 30000kW, it can be connected to a 35kV grid; - For power stations with a capacity of more than 30000kW, the grid-connected voltage level can be determined based on local grid conditions through a technical and economic comparison. 2. All-vanadium flow battery energy storage power stations shall be equipped with necessary communication and information systems in accordance with relevant standards and norms. For all-vanadium flow battery energy storage power stations connected to a 6kV or higher voltage grid, they shall have the function of uploading real-time operating information such as the grid-connected equipment status, grid-connected point voltage, current, active power, reactive power, charging/discharging status, state of charge, maximum charging/discharging power, and charging/discharging quantity to the local power dispatching authority. For user-side energy storage power stations connected to a 380V voltage grid, they shall have the function of reporting the installed capacity data to the l