CAJ | 학술논문

广域阻尼控制是抑制大电网低频振荡的重要手段，决定广域阻尼控制效果的关键是控制地点和广域控制信号的选择。为实现大型互联电网广域控制地点和控制信号的有效、合理选择，提出一种基于频域子空间辨识和集结理论的大电网广域控制安装地点与控制信号选取新方法。首先，将系统的可控可观性进行量化，以实现不同类型输入输出变量的可观性和可控性的量化分析；然后，使用集结理论得到便于测量的控制器可观可控综合指标，用降阶集结模型代替原系统进行广域控制安装地点与控制信号选取，基于集结模型的方法能够方便进行实测，更利于在大型电力系统中应用；最后，提出基于频域子空间辨识的大电网广域控制安装地点与控制信号选取方法，该方法应用频域子空间辨识理论完成量化指标的测量与计算，整个过程便于工程实现。通过实际电网的实例验证了该文方法的有效性及在实际电网中应用的可行性。实例分析表明，所提方法更加有利于工程实现，可应用于实际大型互联电网的广域控制器设计中。
엄역조니공제시억제대전망저빈진탕적중요수단，결정엄역조니공제효과적관건시공제지점화엄역공제신호적선택。위실현대형호련전망엄역공제지점화공제신호적유효、합리선택，제출일충기우빈역자공간변식화집결이론적대전망엄역공제안장지점여공제신호선취신방법。수선，장계통적가공가관성진행양화，이실현불동류형수입수출변량적가관성화가공성적양화분석；연후，사용집결이론득도편우측량적공제기가관가공종합지표，용강계집결모형대체원계통진행엄역공제안장지점여공제신호선취，기우집결모형적방법능구방편진행실측，경리우재대형전력계통중응용；최후，제출기우빈역자공간변식적대전망엄역공제안장지점여공제신호선취방법，해방법응용빈역자공간변식이론완성양화지표적측량여계산，정개과정편우공정실현。통과실제전망적실례험증료해문방법적유효성급재실제전망중응용적가행성。실례분석표명，소제방법경가유리우공정실현，가응용우실제대형호련전망적엄역공제기설계중。
ABSTRACT:Wide-area damping control is important to suppress low frequency oscillation of large-scale power grid:the selection of control installation location and wide-area control signal is a key to determine the effect of wide-area damping control.To achieve the choice of wide-area control installation location and control signals of large-scale interconnected power system effective and reasonable, a new method to select wide-area damping control installation location and control signals of large-scale power grid based on the frequency domain subspace identification and aggregation theory is presented. First, the observability/controllability is quantified,in order to achieve quantitative analysis observability and controllability of different types of input and output variables. Then,a controller considerable and controllable composite index which easy to measure is obtained by using aggregation theory, use reduced-order aggregation model instead of the original system to achieve the selection of wide-area control installation location and control signal, the method based on aggregation theory is easy to measure,is suitable for large-scale power systems. Finally,a new method to select wide-area damping control installation location and control signals of large-scale powe grid based on the frequency domain subspace identification is presented, completing measurement and calculation of quantitative indexes by using frequency domain subspace identification,the whole process is easy to project realize. The effectiveness of the method and the feasibility of the application in the practical grid are demonstrated by the oscillation examples of the practical grid.The practical case study results show that the method can be more suitable for theactual projects,can be applied to design the wide-area controller of large-scale interconnected power system.