Security Control Strategy of Micro-grid Between Grid-connected and Off-grid Based on Virtual Synchronous Generator
As a major branch of integrated energy system, micro-grid is widely used in the local consumption of distributed generation. With the introduction of cold, heat and gas, the requirement of micro-grid security control is becoming higher and higher. The grid-connected and off-grid mode of micro-grid a...
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| Format: | Article |
| Language: | English |
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Editorial Department of Power Generation Technology
2020-12-01
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| Series: | 发电技术 |
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| Online Access: | https://www.pgtjournal.com/EN/10.12096/j.2096-4528.pgt.19151 |
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| author | Yizong GUO Chuangxin GUO |
| author_facet | Yizong GUO Chuangxin GUO |
| author_sort | Yizong GUO |
| collection | DOAJ |
| description | As a major branch of integrated energy system, micro-grid is widely used in the local consumption of distributed generation. With the introduction of cold, heat and gas, the requirement of micro-grid security control is becoming higher and higher. The grid-connected and off-grid mode of micro-grid and the transition process between two operating states were analyzed, furthermore, a control strategy based on improved virtual synchronous generator (VSG) model was proposed. By using appropriate virtual impedance, the characteristics of synchronous reactance were effectively simulated, which ensured the stability of off-grid operation and makes the transition from grid-connected mode to off-grid mode smooth without adding additional control. An improved pre-synchronization control model was proposed for the switching from off-grid mode to grid-connected mode, which could accurately and quickly track the voltage amplitude, frequency and phase. Finally, the model was simulated in Matlab/Simulink environment with a practical example to verify the correctness and advantages of the proposed model. |
| format | Article |
| id | doaj-art-3e16f75e631b48a3be4436fa6e2d5cd9 |
| institution | Kabale University |
| issn | 2096-4528 |
| language | English |
| publishDate | 2020-12-01 |
| publisher | Editorial Department of Power Generation Technology |
| record_format | Article |
| series | 发电技术 |
| spelling | doaj-art-3e16f75e631b48a3be4436fa6e2d5cd92024-11-09T02:27:54ZengEditorial Department of Power Generation Technology发电技术2096-45282020-12-0141665065810.12096/j.2096-4528.pgt.19151fdjs-41-6-650Security Control Strategy of Micro-grid Between Grid-connected and Off-grid Based on Virtual Synchronous GeneratorYizong GUO0Chuangxin GUO1Electrical Engineering College, Zhejiang University, Hangzhou 310027, Zhejiang Province, ChinaElectrical Engineering College, Zhejiang University, Hangzhou 310027, Zhejiang Province, ChinaAs a major branch of integrated energy system, micro-grid is widely used in the local consumption of distributed generation. With the introduction of cold, heat and gas, the requirement of micro-grid security control is becoming higher and higher. The grid-connected and off-grid mode of micro-grid and the transition process between two operating states were analyzed, furthermore, a control strategy based on improved virtual synchronous generator (VSG) model was proposed. By using appropriate virtual impedance, the characteristics of synchronous reactance were effectively simulated, which ensured the stability of off-grid operation and makes the transition from grid-connected mode to off-grid mode smooth without adding additional control. An improved pre-synchronization control model was proposed for the switching from off-grid mode to grid-connected mode, which could accurately and quickly track the voltage amplitude, frequency and phase. Finally, the model was simulated in Matlab/Simulink environment with a practical example to verify the correctness and advantages of the proposed model.https://www.pgtjournal.com/EN/10.12096/j.2096-4528.pgt.19151micro-gridseamless switchvirtual synchronous generator (vsg)virtual impedanceimproved pre-synchronization control |
| spellingShingle | Yizong GUO Chuangxin GUO Security Control Strategy of Micro-grid Between Grid-connected and Off-grid Based on Virtual Synchronous Generator 发电技术 micro-grid seamless switch virtual synchronous generator (vsg) virtual impedance improved pre-synchronization control |
| title | Security Control Strategy of Micro-grid Between Grid-connected and Off-grid Based on Virtual Synchronous Generator |
| title_full | Security Control Strategy of Micro-grid Between Grid-connected and Off-grid Based on Virtual Synchronous Generator |
| title_fullStr | Security Control Strategy of Micro-grid Between Grid-connected and Off-grid Based on Virtual Synchronous Generator |
| title_full_unstemmed | Security Control Strategy of Micro-grid Between Grid-connected and Off-grid Based on Virtual Synchronous Generator |
| title_short | Security Control Strategy of Micro-grid Between Grid-connected and Off-grid Based on Virtual Synchronous Generator |
| title_sort | security control strategy of micro grid between grid connected and off grid based on virtual synchronous generator |
| topic | micro-grid seamless switch virtual synchronous generator (vsg) virtual impedance improved pre-synchronization control |
| url | https://www.pgtjournal.com/EN/10.12096/j.2096-4528.pgt.19151 |
| work_keys_str_mv | AT yizongguo securitycontrolstrategyofmicrogridbetweengridconnectedandoffgridbasedonvirtualsynchronousgenerator AT chuangxinguo securitycontrolstrategyofmicrogridbetweengridconnectedandoffgridbasedonvirtualsynchronousgenerator |