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To maintain energy balance and voltage stability is the basic function for normal operation of DC grid. Analysis and comparison of several commonly used multi-point voltage control methods, a cooperative control strategy is proposed based on improved particle swarm optimization, considering economic performance and voltage quality in both. The method established on traditional multi-point voltage...
The fault diagnosis of diesel engine is a typical cluster analysis. Effective clustering is often achieved through distance calculation in the cluster analysis. Directing at the issue that fault features cannot be effectively calculated with classic Mahalanobis distance and Euclidean distance when there is fuzzy correlation between the variables of fault feature, this article combines Mahalanobis...
The state space equation was established on the basis of the simplified model of the six terminal DC grid to solve the problem of transient voltage stability of DC grid. It used the state feedback method to design a feedback controller suitable for system level control and made a simulation through the physical model, verifying the effectiveness of the state feedback controller, improving the dynamic...
Aiming at characteristics of large time delay, strong coupling and large disturbance, a two-degree-of-freedom internal model control(2DOF-IMC) is proposed for electric pitch servo system. The detailed model and response model of the variable pitch control system which composed of permanent magnetism synchronous motor (PMSM) is analyzed, and the disturbance of blade angle of attack which caused by...
The gel method is used in the experiment to prepare titanium film on the surface of quartz glass printed with comb silver electrodes, and by sintering, a series of humidity-sensitive elements are obtained. Taking equivalent circuit model parameters of Titania humidity sensor as optimizing object, an equivalent circuit optimization method is proposed based on improved genetic algorithm. Elitist strategy...
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