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时间:2020-05-14
《考虑通信时滞和噪声的LED灯参与微电网调频的研究.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第43卷第8期电力系统保护与控制Vl01.43NO.82015年4月16日PowerSystemProtectionandControl,pr.16,2015考虑通信时滞和噪声的LED灯参与微电网调频的研究吴俊明,杨洪明,杨鑫,罗捷,张俊(智能电网运行与控制湖南省重点实验室(长沙理工大学),湖南长沙410114)摘要:由于可再生能源的随机性和问歇性特点,大量可再生能源接入分布式发电系统造成微电网发电与用电功率之问的不平衡。借助LED(Light.EmittingDiode)灯功率调节速度快、潜在容量大的特点,研究了大量LE
2、D灯参与微电网调频的问题。为了确保大量LED灯准确获取微电网控制信号,在带时滞和噪声的不可靠局部通信条件下,提出了分布式信号获取方法。仅通过安装在配电变电站的信号测量装置,借助相邻对象之间的局部通信和交互,实现所有LED灯对系统信号一致性、精确获取。进一步考虑光通量和用电功率之间的非线性关系,设计了LED灯用电功率随微电网频率变化的动态模型,并耦合分布式信号获取动态方程,提出了考虑LED灯的多区域微电网频率控制方法。仿真结果表明:LED灯参与微电网调频后,明显降低了频率波动范围,提高了频率恢复速度。关键词:LED灯;分布式
3、信号获取;局部通信:调频AsurveyonLEDlampsparticipatinginfrequencyregulationofmicrogridconsideringcommunicationdelayandnoiseWUJunming,YANGHongming,YANGXin,LUOJie,ZHANGJun(HunanProvinceKeyLaboratoryofSmartGridsOperationandControl(ChangshaUniversityofScienceandTechnology),Changs
4、ha410114,China)Abstract:Duetotherandomnessandintermittentcharacteristicsofrenewableenergy,alotofrenewableenergygenerationplugsintothemicrogridandcreatestheimbalancebetweengenerationandload.Basedontheadvantagesofhugepotentialcapacityandfastpoweradjustment,thispaper
5、investigatesfrequencyregulationofmicrogridforapplicationofalargenumberoflight-emitingdiode(LED)lamps.Inordertoacquirethesignalaccurately,adistributedsignalacquisitionapproachisproposedbasedonunreliablecommunicationwithcommunicationdelayandnoise.Signalmeasuringdevi
6、cesareperformedonlyatdistributionsubstations,andlocalcommunicationbetweenneighborscallfacilitateconsistentandaccurateacquisitionofsignalsforallLEDlamps.Takingintoconsiderationofthenon-linearrelationshipbetweenfluxandpower,adynamicmodelofpoweradjustingwithfrequency
7、isdesigned.Integratedwithdistributedacquisitionapproach,amulti—regionalmicrogridfrequencycontrolmethodisfurtherproposedwithconsiderationofLEDlamps.SimulationresultsdemonstratethatLEDlampsparticipatinginfrequencysignificantlyreducesthefrequencyfluctuationandincreas
8、esthespeedofrecovery.ThisworkissupposedbyNationalNaturalScienceFoundationofChina(No.71331001).Keywords:LEDlamp;distributedsignalacquisition;localcommuni
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