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He S.,Shanghai JiaoTong University | Zheng Y.,Shanghai JiaoTong University | Cai X.,Shanghai JiaoTong University | Wu X.,Shanghai Electrical Apparatus Research Institute Group Co. | Shi S.,Shanghai Municipal Electric Power Company
Dianli Xitong Zidonghua/Automation of Electric Power Systems | Year: 2015

A novel demand-side dispatching method is put forward aiming at reducing electric cost and shifting load. According to Shanghai high-tech park's microgrid, functions of controllable resources in the microgrid operation are analyzed. The demand-side management system uses storage resources and shiftable load resources to shed and optimize whole-day load curve in advance. Considering that the optimization is the nonlinear mixed integer programming, the particle swarm optimization (PSO) algorithm is employed to solve the problems. In addition, heuristic rules and iteration algorithm are combined to speed up the calculation and get better conclusion. Example indicates that by using the optimization of demand-side management system, not only the overall load peak is shifted, but also the electricity costs are reduced by the time of use price policy, the speed is more quickly, and the results are close to the conclusion delivered by centralization method. ©2015 Automation of Electric Power Systems Press Source


Li H.,Taiyuan University of Science and Technology | Huang Q.,Taiyuan University of Science and Technology | Gong X.,Taiyuan University of Science and Technology | Ju C.,Shanghai JiaoTong University | And 4 more authors.
Advanced Materials Research | Year: 2011

Steel plate automatic tracking is the key to achieve the whole process of automatic control and the whole heat treatment line level-3 process control for leveller, such as the process layout of leveling region, automatic tracking and control system, control system network structure for leveller etc. This paper paid special attention to the detailed technological analysis of the plate of leveling region to achieve automatic tracking process, and introduced the new control mathematical model that contained the roller's orientation. By test validation and more practical application of the full-hydraulic leveling, lots of data has shown that the method is accurate and reliable. © (2011) Trans Tech Publications. Source


Ba L.J.,University of Electronic Science and Technology of China | Jin J.X.,University of Electronic Science and Technology of China | Wu Z.H.,CRRC Qingdao Sifang Co. | Zheng L.H.,Shanghai Electrical Apparatus Research Institute Group Co.
2015 IEEE International Conference on Applied Superconductivity and Electromagnetic Devices, ASEMD 2015 - Proceedings | Year: 2015

A HTS linear synchronous generator (HTSLSG) as a direct-drive wave energy converter (DWEC) has been proposed and designed, including structure design and operation mode. Advantages of the DWEC system using HTSLSG have also been verified. © 2015 IEEE. Source


He S.,Shanghai JiaoTong University | Zheng Y.,Shanghai JiaoTong University | Cai X.,Shanghai JiaoTong University | Wu X.,Shanghai Electrical Apparatus Research Institute Group Co. | Shi S.,Shanghai Municipal Electric Power Company
Dianwang Jishu/Power System Technology | Year: 2014

Taking a certain Sci-tech Park's microgrid in Shanghai as example, an energy source management optimization method, in which three electric power resources such as distributed generation, energy storage system and shiftable load are included, is proposed. In the proposed method firstly the output of renewable energy sources are fully consumed by the load in the park; then the controllable DGs, energy storage system and shiftable load are utilized to perform the second round optimization for the load that has been reduced. Considering the fact that there are a lot of non-linear programmings in the optimization problem, a decomposition iteration algorithm, which independently solves three kinds of controllable resources such as DG, load and energy storage by particle swarm optimization (PSO) to make the solutions of the three kinds of controllable resources closed to globally optimal solution through iterations, is put forward. Besides, in allusion to the difficulty in load prediction due to the randomness of the load in microgrid, a receding horizon optimization method is given to improve the accuracy and real-time of global optimization. The effectiveness of the given method is validated by the results of case calculation. Source


Lu J.,Hebei University of Technology | Li K.,Hebei University of Technology | Du T.,Hebei University of Technology | Ji H.,Shanghai Electrical Apparatus Research Institute Group Co.
Diangong Jishu Xuebao/Transactions of China Electrotechnical Society | Year: 2012

Molded case circuit-breakers (MCCB) is one of the widely used low-voltage electric apparatus and its reliability has great influence on the electric equipment and the power grid. The operation reliability test, instantaneous protection reliability test and overload protection reliability test are analyzed in this paper. The reliability compliance test plan of MCCB is drawn out according to λ max, β or R min, β. That the overload protection test should be conducted under specified ambient temperature to ensure the accuracy and consistency of the test results is put forward. The test items of the sample in the reliability test of MCCB are analyzed and especially the test method and test items in the reliability test are specified. The test procedure of reliability test of MCCB is presented, and the reliability compliance test plan, the test sample numbers and so on are determined combined with practical examples. Source

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