|
| Research on online operation method for protective relay of smart substation |
| DOI：10.19783/j.cnki.pspc.191013 |
| Key Words:hybrid microgrid islanded mode interlinking converter adaptive droop control hysteretic control |
| Author Name | Affiliation | | ZHANG Guorong | School of Electrical Engineering and Automation, Hefei University of Technology, Hefei 230009, China | | DING Xiaotong | Power Dispatch Control Center of Guangdong Power Grid Co., Ltd., Guangzhou 510600, China
Key Lab for Protective Relaying Real Time Digital Simulation of Guangdong Power Grid Co., Ltd., Guangzhou 510600, China | | PENG Bo | Power Dispatch Control Center of Guangdong Power Grid Co., Ltd., Guangzhou 510600, China
Key Lab for Protective Relaying Real Time Digital Simulation of Guangdong Power Grid Co., Ltd., Guangzhou 510600, China | | XIE Runsheng | Power Dispatch Control Center of Guangdong Power Grid Co., Ltd., Guangzhou 510600, China
Key Lab for Protective Relaying Real Time Digital Simulation of Guangdong Power Grid Co., Ltd., Guangzhou 510600, China | | BI Kangjun | Power Dispatch Control Center of Guangdong Power Grid Co., Ltd., Guangzhou 510600, China
Key Lab for Protective Relaying Real Time Digital Simulation of Guangdong Power Grid Co., Ltd., Guangzhou 510600, China |
|
| Hits: 4224 |
| Download times: 1360 |
| Abstract:As an important part of a hybrid AC/DC microgrid, the interlinking converter not only needs to allocate the power between the AC microgrid and the DC microgrid, but also needs good dynamic performance. In order to solve the problem that the interlinking converter based on the traditional droop control has small inertia and poor transient performance in the islanded mode, the interlinking converter control strategy based on adaptive droop control is proposed. By introducing the difference between the frequency of the AC microgrid and the voltage of the DC microgrid in the droop coefficient, the system inertia is dynamically increased and the system transient performance is improved. In order to avoid frequent switching of the interlinking converter rectification and the inverter mode, a hysteretic control method is proposed to improve system stability. Finally, the simulation results of Matlab/Simulink show that the adaptive droop control method in the islanded mode can effectively increase the inertia of the system and improve the stability of the dynamic process. The hysteresis control method can effectively reduce the power difference between the AC and DC sides caused by the dead zone addition.
This work is supported by National Key Research and Development Program of China (No. 2017YFB0903100) and Science and Technology Project of State Grid Corporation of China (No. 521104170043). |
| View Full Text View/Add Comment Download reader |
|
|
|