The national key research and development project "Stability Control Technology of DC Transmission System of Renewable Energy Power Generation Base" passed the acceptance

Recently, the National Key R&D Program project (“Stability Control Technology of DC Transmission System of Renewable Energy Power Generation Base”) in which Tianjin Electric Science Research Institute Co., Ltd. (TERI) participated was successfully accepted. The project was hosted by State Grid China Electric Power Research Institute Co., Ltd. (CEPRI).

In the project, Tianjin Electric Power Research Institute is responsible for the synchronous power generation system (referred to as the synchronous power generation simulation system) of the dynamic simulation platform of the new energy power generation DC transmission system. The synchronous power generation simulation system incorporates a variety of distributed power generation, transmission and distribution equipment such as photovoltaic power generation, wind power generation, DC transmission, energy storage, etc., which puts forward high technical requirements for the stable operation control of the isolated island power grid.

The synchronous power generation simulation system of this project consists of two groups of power generation equipment and supporting drive and excitation equipment. The two groups of power generation systems can realize "isolated grid/grid-connected", "single machine/multiple machines" combination and independent operation, and both have constant power output mode (P/Q mode) and voltage and frequency stabilization mode (V/F mode), and can implement the establishment of isolated grid and isolated grid stabilization as well as the adjustable constant power output function of large grid grid connection. The isolated grid operation condition is selected according to the "single machine/multiple machines" combination, automatically realizing isolated grid stabilization and multi-machine active and reactive power distribution, with fast dynamic response and precise steady-state regulation, which is suitable for the research on grid characteristics of isolated grid or weak grid for wind, light, and storage new energy grid connection.

At the same time, the inverter and rectifier equipment of the generator-driven motor in this project all use the TAC1 series frequency conversion products, multi-drive full-digital AC inverters and AFE active front-end rectifiers with energy feedback function independently developed by Tianjin Electric Power Research Institute, demonstrating the comprehensive capabilities of Tianjin Electric Power Research Institute in power electronics technology research and development and product application.

The successful application of the synchronous power generation simulation system not only contributed to the high-level completion of the experimental research and acceptance of the National Key R&D Project of China Electric Power Research Institute "Stability Control Technology of DC Transmission System of Renewable Energy Power Generation Base", but also demonstrated the strong strength of Tianjin Electric Research Institute in distributed energy grid connection and energy storage microgrid control technology.