Huawei Inverter: China Electric Power Research Institute's first batch of photovoltaic inverter model parameter tests

On February 3, the National Energy Solar Power Research and Development (Experimental) Center (NESC) of the China Electric Power Research Institute successfully carried out the first domestic photovoltaic inverter model parameter test based on actual photovoltaic power stations.

The model parameter testing work was mainly based on the State Grid Corporation of China's Q/GDW 1993-2013 "Photovoltaic Power Station Model Verification and Parameter Testing Procedure" and Q/GDW 1994-2013 "Photovoltaic Power Station Modeling Guidelines", combined with the requirements of the Zhejiang Provincial Control Center. For the two Huawei string photovoltaic inverters used in the Zhejiang Zhongli Tenghui 100MW photovoltaic power station, based on the independently developed photovoltaic inverter grid-connected performance detection platform and model parameter identification software, the model parameters of the photovoltaic inverter were accurately obtained.

The photovoltaic inverter model parameter test requires more than 200 sets of tests for various types of working conditions such as fault ride-through, active and reactive power control, small disturbances in grid voltage, and irradiance disturbances, to achieve full coverage of the photovoltaic power generation grid-connected operating environment. Compared with conventional grid-connected detection test conditions, it is more comprehensive and more difficult to process and analyze data. The model parameters obtained through testing and identification can more truly reflect the grid-connected control and protection characteristics of photovoltaic inverters, and can be used in PSASP, BPA, DIgSILENT PowerFactory and other commonly used power system simulation and analysis software at home and abroad.

The implementation of photovoltaic inverter modeling and parameter testing has laid a solid foundation for the subsequent whole-station modeling and the safe and stable analysis and control of the power system after large-scale photovoltaic power generation is connected to the grid. It will help promote the coordinated operation of photovoltaic power generation and the power grid, and promote the advancement of my country's photovoltaic power generation grid-connected technology level and the improvement of its absorption capacity.