On August 27, 2020, the Huaneng Mengcheng wind power 40MW/40MWh energy storage project was approved for grid connection by State Grid Anhui Electric Power Co., LTD. Project engineering, procurement, and construction (EPC) was provided by Nanjing NR Electric Co., Ltd., while the project’s container energy storage battery system was supplied by Gotion High-tech. This project is currently the largest combined wind power and energy storage project in China.
The Inland Plain Wind Farm Project in Mengcheng County is owned by the Anhui Branch of Huaneng International. The project has a total installed capacity of 200MW, with a paired energy storage capacity of 20% and duration of one hour. The energy storage system construction is divided into two phases. Phase one is the 150MW Xiaojian project, while phase two is the 50MW Xutuan project. In May 2020, the project EPC bidding results were revealed. NR Electric Co., Ltd. was awarded the phase one project with a bid of 52,794,970 RMB, and additionally awarded the phase two project with a 19,794,775 RMB bid. The systems were delivered in less than 3 months.
The control system of the energy storage station adopts the IEC-61850 standard specification, achieving fast power control function through a unified hardware and software platform consisting of a coordinated control system and converter group. Primary frequency control and voltage control response speed is less than 30ms. The project realizes the stable, transient, and urgent multi-dimensional composite control function of energy storage in renewable energy applications for the first time in China, maximizes the application value of energy storage in renewable energy scenarios, and provides demonstration of the multiple functions of energy storage for renewable energy projects.