Real-time simulation algorithm design of a virtual synchronous grid-connected inverter system based on a CPU-FPGA heterogeneous platform
DOI：10.19783/j.cnki.pspc.190989
Key Words:grid-connected inverter system  real-time simulation  virtual synchronization control  electromagnetic transient simulation algorithm  field programmable gate array
Author NameAffiliation
WU Pan Key Laboratory of Control of Power Transmission and Conversion, Ministry of Education (Shanghai Jiao Tong University), Shanghai 200240, China 
WANG Keyou Key Laboratory of Control of Power Transmission and Conversion, Ministry of Education (Shanghai Jiao Tong University), Shanghai 200240, China 
XU Jin Key Laboratory of Control of Power Transmission and Conversion, Ministry of Education (Shanghai Jiao Tong University), Shanghai 200240, China 
LI Guojie Key Laboratory of Control of Power Transmission and Conversion, Ministry of Education (Shanghai Jiao Tong University), Shanghai 200240, China 
Hits: 3542
Download times: 1297
Abstract:With the wide application of power electronic devices in power systems, the demand for small time-step (≤ 2μs) electromagnetic transient real-time simulation increases. While a CPU is unable to meet the demand alone, there is a trend to complement it with a Field Programmable Gate Array (FPGA). A CPU-FPGA heterogeneous computing platform available for real-time simulation of virtual synchronous grid-connected inverter system is built. Within it, the circuit part on the FPGA is implemented with an optimized Electro-Magnetic Transient Program (EMTP) algorithm. Constant admittance switch modeling, branch division with parallel processing and high efficiency matrix operation are used to improve real-time performance. The control part on the CPU adopts virtual synchronization control and designs a data interaction interface for asynchronous communication with the FPGA. A small step real-time simulation of the grid-connected inverter system is conducted and compared with the results of a Simulink offline simulation. At the same time, the real-time performance of the platform and resource consumption on FPGA is analyzed. All results above can verify the accuracy and effectiveness of a real-time simulation of the virtual synchronous grid-connected inverter system based on the proposed platform. This work is supported by National Natural Science Foundation of China (No. 51877133).
View Full Text  View/Add Comment  Download reader