Yang J.-T.,North China Electrical Power University |
Ma X.-F.,North China Electrical Power University |
Yang P.-P.,Lanzhou Power Supply Company
Applied Mechanics and Materials | Year: 2014
This article put forward with "DG optimization of the distribution network benefit" to measure the operating economy of distribution network containing DG and build an economic analysis model. Based on flow calculation, this model analysis the economic of distributed network with DG fully consider the various factors that have an impact on the economic of distribution network, such as line losses, transformer losses, electricity price and DG itself variable costs.Through the flow calculation and analysis, the feasibility of the model is validated. © (2014) Trans Tech Publications, Switzerland.
Xiao J.,Gansu Electric Power Research Institute |
Xiao J.,Lanzhou power supply company |
Chen W.,Lanzhou University of Technology
Applied Mechanics and Materials | Year: 2013
Wind turbine pitch control need a higher demand due to the random changes in wind speed, this paper proposes using adaptive neural fuzzy inference system to control wind turbine pitch, and constructs a mathematical model of the wind turbine. Consider the error between the measured and the actual value of generator speed as the input to the controller. Take a simulation analysis to the adaptive neural fuzzy inference system controller under random wind speed. The simulation results show that the adaptive neural fuzzy inference system control strategy has good robustness and dynamic performance, to improve wind turbine pitch control is feasible and effective. © (2013) Trans Tech Publications, Switzerland.
Liang F.,North China Electrical Power University |
Liu W.-Y.,North China Electrical Power University |
Zou P.-Y.,Lanzhou Power Supply Corporation |
Li S.-W.,Lanzhou Power Supply Corporation |
Yang X.-D.,Lanzhou Power Supply Corporation
Dianli Xitong Baohu yu Kongzhi/Power System Protection and Control | Year: 2011
After analyzing some problems in the traditional project of grid maintenance scheduling, the paper proposes a new design scheme using graphic operation to assist the compilation of grid maintenance scheduling. On the one hand, the proposed compilation method ensures the normalization of basic data of grid maintenance. On the other hand, the association and interaction between the graphical interface and intelligent analysis for the grid maintenance scheduling are improved. The graphic operation compilation is proposed and graphic element and standard data mapping mechanism is used to obtain the normative basic data from the equipment mapping database by heuristic search. On this basis, graphic operation triggers the connectivity analysis, makes the obtained basic data associated with the grid maintenance knowledge-base, and then completes the adjustment and compilation interactively in graphic environment. The month maintenance scheduling from Lanzhou Power Supply Corporation is presented as a real-world case to prove the feasibility and scientific of the proposed method.
Fan S.-Z.,Lanzhou Power Supply Company
Dianli Xitong Baohu yu Kongzhi/Power System Protection and Control | Year: 2010
Conventional automatic standby power device does not take into account overload-cutting at lines standby switch way and the overload discriminant on mid-low side of three-volume transformer,so it could only realize overload-cutting at bus tie circuit breaker standby switch way. On the basis of the existing hardware, by modifying the software logic and making the hardware necessary changes, the overload-cutting functions under each automatic standly switch way are realized, and the implementation method is given by using PSP642.