电器与能效管理技术
電器與能效管理技術
전기여능효관리기술
Low Voltage Apparatus
2015年
18期
40-44
,共5页
直流微电网%稳定%恒功率负载%回路抵消
直流微電網%穩定%恆功率負載%迴路牴消
직류미전망%은정%항공솔부재%회로저소
DC microgrid%stabilization%constant power load%loop counteraction
为了解决直流微电网中含有大量的变换器,在闭环控制下的特性表现为恒功率负载,并引起直流微电网母线电压不稳定的问题,提出了一种回路抵消技术。通过引入非线性反馈支路,抵消恒功率负载的负阻抗特性,从而确保了直流微电网的稳定。仿真试验结果表明,方法是可行和有效的。
為瞭解決直流微電網中含有大量的變換器,在閉環控製下的特性錶現為恆功率負載,併引起直流微電網母線電壓不穩定的問題,提齣瞭一種迴路牴消技術。通過引入非線性反饋支路,牴消恆功率負載的負阻抗特性,從而確保瞭直流微電網的穩定。倣真試驗結果錶明,方法是可行和有效的。
위료해결직류미전망중함유대량적변환기,재폐배공제하적특성표현위항공솔부재,병인기직류미전망모선전압불은정적문제,제출료일충회로저소기술。통과인입비선성반궤지로,저소항공솔부재적부조항특성,종이학보료직류미전망적은정。방진시험결과표명,방법시가행화유효적。
There are a lot of converters in the DC microgrid.This tightly regulated closed-loop converters may cause stability problem of bus voltage when used as a load since they trend to draw constant power and exhibit negative incremental resistance.A novel nonlinear feedback technique,called loop counteraction,was introduced. This technique counteracts the destabilizing effect of the constant power loads and insures the stability of DC microgrid.The feasibility and effectiveness of this method are verified by the simulation results.