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Direct drive wind turbine (PMSG) has become the mainstream model and is widely used in power grid because of its superiority, but it is difficult to evaluate the influence of its control parameters on shortcircuit current characteristics due to the lack of quantitative analysis methods. Therefore, the analytic expression of threephase shortcircuit current is obtained by the calculation method of PMSG active current and reactive current through Parker transformation. Based on the trajectory sensitivity method, the influence mechanism of different control parameters on shortcircuit current is quantitatively analyzed from three aspects of generator parameters, voltage drop coefficient and PI parameter, and the parameter with greater sensitivity is selected as the leading parameter. The optimization objective function is constructed to optimize the main control parameters of PMSG short circuit current. Finally, the electromagnetic transient simulation model of PMSG was established on the PSCAD platform to verify and analyze the shortcircuit current characteristics of PMSG and the optimization effect of control parameters. The research results show that the trajectory sensitivity analysis method can quantify the influence of control parameters on shortcircuit current characteristics, and can provide guidance for parameter tuning in practical engineering.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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