Wei X.,State Grid Corporation of China |
Ding J.,Beijing Haitong Tiancheng Information Technology Co. |
Liu J.,Heilongjiang Electric Power Company |
Wei T.,Heilongjiang Electric Power Company
IOP Conference Series: Earth and Environmental Science | Year: 2017
Relying on the global energy Interconnection, considering the energy implementation, carrying out clean energy alternative is mainly to use the clean energy to take place of fossil energy. Under the green development scenario, This research gives the global energy interconnection development model, makes the Artic and the Equation as the connection points, gives the Northern hemisphere interconnection model and equator interconnection model unite the whole world energy. This research also identifies the factors effecting the transmission changes cost, including generation cost, transmission cost and landing cost. And take two continents connection as the prediction example, estimate these two continents cost benefit and variable power-jointed scheme cost competitiveness. It showed that under the global energy interconnection mode, the trans-continent mode had better benefit, and the landing cost is good to be used, can solve the pollution and energy restriction. © Published under licence by IOP Publishing Ltd.
Cai C.,Harbin Engineering University |
Zhang C.,Harbin Engineering University |
Gang L.,Heilongjiang Electric Power Company
2016 IEEE International Conference on Information and Automation, IEEE ICIA 2016 | Year: 2016
In this paper, a novel fault diagnosis approach combining support vector machine (SVM) with association rule mining for ship diesel engine is designed for enhancing accuracy rate of ship diesel engine fault diagnosis. We used SVM algorithm and association rule to analyze fault data for lubricating subsystem of ship diesel engine so as to achieve fault diagnosis for lubricating system. We explained in detail fault diagnosis for lubricating system in the paper. Finally, we design a ship diesel engine condition monitoring and fault diagnosis simulation system used to verify the novel fault diagnosis approach. © 2016 IEEE.
Shi J.,Harbin Institute of Technology |
Liu X.,Harbin Institute of Technology |
He L.,University of California at Los Angeles |
Han M.,Harbin Institute of Technology |
And 2 more authors.
IEEE Transactions on Signal Processing | Year: 2016
The linear canonical transform (LCT), which generalizes many classical transforms, has been shown to be a powerful tool for signal processing and optics. Sampling theory of the LCT for bandlimited signals has blossomed in recent years. However, in practice signals are never perfectly bandlimited, and in many cases measurement devices are nonideal. The objective of this paper is to develop a sampling theorem for the LCT from general measurements, which can provide a suitable and realistic model of sampling and approximation for real-world applications. We first describe a general class of approximation spaces for the LCT and provide a full characterization of their basis functions. Then, we propose a generalized sampling theorem for arbitrary measurement and approximation spaces associated with the LCT. Several properties of the proposed sampling theorem are also discussed. Furthermore, the approximation error is estimated. Finally, numerical results and several applications of the derived results are presented. © 1991-2012 IEEE.
Lu F.,Harbin Institute of Technology |
Yu J.,Harbin Institute of Technology |
Li Y.,Heilongjiang Electric Power Company |
Gao H.,Harbin Electrical Power Bureau
Dianwang Jishu/Power System Technology | Year: 2012
To control the transient stability emergency effectively, starting with the information of critical generator pairs a generator tripping/load shedding control strategy based on sensitivity of stability indices of critical generator pairs is proposed. Firstly, the expression of the sensitivity of stability indices of critical generator pairs to control variables is derived and applied to construct constraints of transient stability, and then by means of optimization algorithm the amounts of both tripped generators and shed load needed for emergency control as well as corresponding substations to perform the measures are achieved. Only part of generator information is needed for the proposed method, so the calculation is simple and by means of the sensitivity of stability indices of critical generator pairs the control ability of control quantity to each instable generator can be expressed and its physical meaning is clearer. Simulation results show that the amount of generator tripping and load shedding by the proposed method is less than that by the method based on the sensitivity of margin sensitivity of the whole system.
Jicheng D.,China Electric Power Research Institute |
Yongning C.,China Electric Power Research Institute |
Lin Z.,Heilongjiang Electric Power Company |
Sandholt K.,Ea Energy Analyses |
And 3 more authors.
Energy Education Science and Technology Part A: Energy Science and Research | Year: 2011
In recent years, there has been a dramatically development of Chinese wind power, and the scale of the wind farms are increasing. Wind power is a fluctuating energy source, which means that the other power generation units have to adjust to accommodate the fluctuations and ensure the power balance in the grid. This poses the question of how to optimize the power grid to accommodate the increased amount of fluctuating energy. This paper analyses the power system's capability to accommodate wind energy while ensuring the power balance in the system, considering how to achieve the lowest system cost and different constraints such as electricity balance equation, unit minimum load level, unit start-up time etc. The Heilongjiang power system has been chosen as a case study and three scenarios have been analyzed. © Sila Science.
Wang L.,Kochi University of Technology |
Watanabe T.,Kochi University of Technology |
Xu Z.,Heilongjiang Electric Power Company
Energies | Year: 2015
In this study, the structures of external costs are built in line with coal-fired and biomass power plant life cycle activities in Northeast China. The external cost of coal-fired and biomass power plants was compared, using the lifecycle approach. In addition, the external costs of a biomass power plant are calculated for each stage for comparison with those of a coal-fired power plant. The results highlight that the external costs of a coal-fired plant are 0.072 US $/kWh, which are much higher than that of a biomass power plant, 0.00012 US$/kWh. The external cost of coal-fired power generation is as much as 90% of the current price of electricity generated by coal, while the external cost of a biomass power plant is 1/1000 of the current price of electricity generated by biomass. In addition, for a biomass power plant, the external cost associated with SO2, NOX, and PM2.5 are particularly lower than those of a coal-fired power plant. The prospect of establishing precise estimations for external cost mechanisms and sustainable energy policies is discussed to show a possible direction for future energy schemes in China. The paper has significant value for supporting the biomass power industry and taxing or regulating coal-fired power industry to optimize the energy structure in China. © 2015 by the authors.
Tao X.-M.,Harbin Engineering University |
Liu F.-R.,Heilongjiang Electric Power Company |
Liu Y.,Harbin Engineering University |
Tong Z.-J.,Harbin Engineering University
Ruan Jian Xue Bao/Journal of Software | Year: 2012
To deal with the problem of premature convergence and low precision of the traditional particle swarm optimization algorithm, a particle swarm optimization (PSO) algorithm based on multi-scale cooperative mutation, is proposed, which is guaranteed to converge to the global optimal solution with probability one. The special multi-scale Gaussian mutation operators are introduced to make the particles explore the search space more efficiently. The large-scale mutation operators can be utilized to quickly locate the global optimal space during early evolution. The small-scale mutation operators, which are gradually reduced according to the change of the fitness value can implement the accuracy of the solution at the late evolution. The proposed method is applied to six typical complex function optimization problems, and the comparison of the performance of the proposed method with other PSO algorithms is experimented. The results show that the proposed method can effectively speed up the convergence and improve the stability. © 2012 ISCAS.
Lu Z.,Yanshan University |
Zhang J.,Yanshan University |
Cheng H.,Yanshan University |
Bao F.,Heilongjiang Electric Power Company
Dianli Xitong Zidonghua/Automation of Electric Power Systems | Year: 2012
In traditional distributed state estimation, a subarea does not consider the network model and operating state of its neighboring subnet when making its own estimation independently while making up for the previously neglected information only during coordination. To remedy such a situation, a new distributed state estimation based on decomposition and coordination equivalent to external network concentration is presented according to the multi-agent theory. The large-scale power system is decomposed into a number of overlapping subsystems to build a 2-dimensional federated multi-agent framework suitable for distributed state estimation. By establishing the external network concentration equivalent model all subsystems are enabled to consider their neighbors' influence. Thus the estimate solution in each subarea can satisfy definite precision requirements even without outside coordination. A heuristic coordination and correction mechanism based on the blackboard model is founded and the information fusion rate accelerated. And the adjacent systems are subjected to the effect from non-boundary nodes. In addition, outer iteration is performed according to the analysis of the injected power's sensitivity by the quantity of the node states to avoid repeated estimate. Test results on IEEE 14-bus, 30-bus and 118-bus system each show the correctness and effectiveness of the algorithm proposed.
Liang Y.,Harbin University of Science and Technology |
Bian X.,Harbin University of Science and Technology |
Yu H.,Harbin University of Science and Technology |
Liu X.,Heilongjiang Electric Power Company |
Li C.,Heilongjiang Electric Power Company
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | Year: 2013
The deficient transposition is the widely used type of transposition in stator windings of electric machines. The calculation of circulation current losses in stator winding is very important in the design of stator winding, which will determine the transposition angle of stator windings. The existing leakage susceptible electric potential method, which is used in the calculation of circulation current losses, is only suitable for the electric machines whose one layer winding is composed of one bar. The improved leakage susceptible electric potential method was presented in this paper to calculate the circulation current losses in stator windings of deficient transposition when one layer winding was composed of multiple bars. The circulating current and circulating current losses in the stator winding strands of pump motor used in nuclear power under no-load operation condition were calculated depending on the improved leakage susceptible electric potential method. Compared with the experimental data, the calculation method is proved right. Finally, the distribution of circulating current and circulating current losses in the upper winding strands were obtained when different transposition angles were applied in stator bars and the best transposition angle was determined. © 2013 Chin. Soc. for Elec. Eng.
Zhang H.W.,Heilongjiang Electric Power Company
Advanced Materials Research | Year: 2013
Monitoring system uses upper and lower machine model. The machine adopts the simple operation, reliable performance of PLC acquisition of main fan for each parameter and alarm control. In order to ensure that the fan monitoring system reliability and real time nature, based on the VC++ and SQL Server to develop a set of computer monitoring system. Monitoring software system and data acquisition and processing hardware system connected by a RS-485 bus system. Computer to other computers in a network or through the monitoring host forwarding see fan monitoring interface. © (2013) Trans Tech Publications, Switzerland.