电力系统自动化
電力繫統自動化
전력계통자동화
AUTOMATION OF ELECTRIC POWER SYSTEMS
2014年
13期
187-195,215
,共10页
贾东强%韦统振%霍群海
賈東彊%韋統振%霍群海
가동강%위통진%곽군해
统一电能质量调节器%稳定性%交互影响%特征根%灵敏度%协调控制
統一電能質量調節器%穩定性%交互影響%特徵根%靈敏度%協調控製
통일전능질량조절기%은정성%교호영향%특정근%령민도%협조공제
unified power quality conditioner (UPQC)%stability%interaction%eigenvalue%sensitivity%coordinated control
针对统一电能质量调节器(UPQC)切换运行模式时引起的小扰动稳定性及动态交互影响问题,建立了包括串、并联变流器控制在内的小信号模型,对比分析了串、并联变流器独立运行以及联合运行时的稳定性及动态性能,并以特征根灵敏度的方法研究了控制参数、负荷等因素与 UPQC运行模式切换时的小扰动稳定性的关联机理。该结论可为UPQC的参数设计提供部分参考依据,其后提出了可减少串并联变流器与电网之间能量交换、提高串联变流器利用率的新型功率流协调控制策略。时域仿真证实了相关结论的有效性及协调控制策略的可行性。
針對統一電能質量調節器(UPQC)切換運行模式時引起的小擾動穩定性及動態交互影響問題,建立瞭包括串、併聯變流器控製在內的小信號模型,對比分析瞭串、併聯變流器獨立運行以及聯閤運行時的穩定性及動態性能,併以特徵根靈敏度的方法研究瞭控製參數、負荷等因素與 UPQC運行模式切換時的小擾動穩定性的關聯機理。該結論可為UPQC的參數設計提供部分參攷依據,其後提齣瞭可減少串併聯變流器與電網之間能量交換、提高串聯變流器利用率的新型功率流協調控製策略。時域倣真證實瞭相關結論的有效性及協調控製策略的可行性。
침대통일전능질량조절기(UPQC)절환운행모식시인기적소우동은정성급동태교호영향문제,건립료포괄천、병련변류기공제재내적소신호모형,대비분석료천、병련변류기독립운행이급연합운행시적은정성급동태성능,병이특정근령민도적방법연구료공제삼수、부하등인소여 UPQC운행모식절환시적소우동은정성적관련궤리。해결론가위UPQC적삼수설계제공부분삼고의거,기후제출료가감소천병련변류기여전망지간능량교환、제고천련변류기이용솔적신형공솔류협조공제책략。시역방진증실료상관결론적유효성급협조공제책략적가행성。
A small signal stability model is developed based on the small-signal stability and dynamic interaction problems caused by operation mode-switching of unified power quality conditioners (UPQCs).The small-signal model also includes series and parallel converter controls.The stability and dynamic characteristics between independent converter operating mode and combined series and/or parallel converter operation mode are analyzed.Eigenvalue sensitivity analysis with respect to factors such as control-parameters and load-factors are also studied.This study can provide some theoretical guide for parametric design.A coordinated control strategy is also presented based on the new power flow compensation.Case studies are given to validate the effectiveness of the small signal stability model and feasibility of the proposed control strategy.