Henan’an, China
Henan’an, China

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Lu G.-F.,North China Institute of Water Resources and Electrical Power | Hua Y.,Huazhong University of Science and Technology | Jin X.-B.,Sanmenxia Power Supply Company | Ren Z.-Q.,Zhoukou Architectural Design and Research Academy
Dianli Xitong Baohu yu Kongzhi/Power System Protection and Control | Year: 2010

This paper puts forward a new single-phase earth fault line selection method based on the difference of zero-sequence high-frequency amplitude as line selection criterion. The new method is for the single-phase protection in ineffectively grounded power systems. With this method, weights is given to the fault line and the non-fault line respectively, and the characteristic difference between the fault line and the non-fault line is enlarged. This paper analyzes high-frequency amplitude after the fault line of the signal processed by wavelet transform, then processes them, thus gets the weight of each line. The validity of the criterion is testified with simulation experiments in various conditions.


Li W.-W.,China Three Gorges University | Wu X.-X.,China Three Gorges University | Huang J.,Sanmenxia Power Supply Company | Ma Q.,Fujian Electric Power Company | Guo X.-H.,Northeast China Grid Company
Dianli Xitong Baohu yu Kongzhi/Power System Protection and Control | Year: 2013

Because of the uncertainty of the natural runoff of reservoir, a mid-long term reservoir operation stochastic optimization model is established for the hybrid pumping storage power station based on describing the stochastic process of runoff, which takes the maximum energy generating expectation as its objective. The stochastic dynamic programming algorithm has two control variables: water flow and pumping time. Case study of Baishan mixed pumped storage units shows the energy generating expectation of scheduling period increases from 2 165 million kW·h to 2 463 million kW·h, the guaranteed output increases by 12 MW, and the water level is slightly higher in all periods. At the same time, compared with the model established by the long series of law, the stochastic model obtains better results and the model can better reflect the randomness of the natural runoff, even more practical.


Jin W.-G.,Wuhan University | Liu H.-J.,Wuhan University | Li Z.-M.,Sanmenxia Power Supply Company
Dianli Xitong Baohu yu Kongzhi/Power System Protection and Control | Year: 2010

Firstly, two engineering examples concerning interharmonic exciting SSO are enumerated and analyzed. Then, the mechanism of interharmonics arising from asynchronous HVDC scheme linking two AC systems of same nominal frequency is analyzed based on modulation theory; SSO will be excited if the frequencies of interharmonics match with the nature frequencies of shafts and at the same time the magnitudes of them are noticeable, which is the mechanism of interharmonic exciting SSO. Next, two types of interaction with regard to interharmonic exciting SSO are generalized, one is the severe shaft torsional oscillation, and the other is the long-term fatigue life loss; the excitation conditions and characteristics of the two types of interaction are analyzed; in fact, the second type of interaction is ubiquitous and its harmfulness to shafts is even greater than three-phase-to-ground fault. Finally, the counter-measures against interharmonic exciting SSO are discussed.


Zhang Y.,Sanmenxia Power Supply Company | Zhang S.,Sanmenxia Power Design Co. | Lin Y.,Sanmenxia Power Design Co.
2011 International Conference on Electrical and Control Engineering, ICECE 2011 - Proceedings | Year: 2011

This thesis analyzes the development of power fiber to the home (PFTTH), and historical necessity of intelligent electrical network in user terminal development. Through the illustration of electricity system design scheme of intelligence community based on the PFTTH and the research of intelligent home function about the pilot project of electric power fiber to the home in henan, it puts forward the construction of intelligent power utilization community, which not only promoted the three nets fusion, but also developed and improved the intellectualization& informatization level of intelligent community and intelligent home. © 2011 IEEE.


Nan G.,Sanmenxia Power Supply Company | Zhang S.,Sanmenxia Power Design Co. | Lin Y.,Sanmenxia Power Design Co. | Shao M.,Sanmenxia Power Design Co.
2011 International Conference on Multimedia Technology, ICMT 2011 | Year: 2011

This thesis analyzes the pilot project of intelligent power consumption information collection EPON system of power fiber to the home. It develops its research about the network technology solutions and principle, and discussed the Networking technology scheme from the technological superiority of the system, system structure, network model, installation principles, the requirements of ONU and OLT selection. It points out that information collection system cooperated with EPON technology use optical fiber to every meter and home, including some business about electricity information collection, intelligent power utilization"two-way" interaction, "three nets fusion" and so on. It is the inevitable requirement to construct strong power grid and the inevitable choice to promote social resources sharing. © 2011 IEEE.


Peng J.-C.,Shenzhen University | Li C.-H.,Shenzhen University | Qi X.-H.,Sanmenxia Power Supply Company | Chen L.-B.,Shenzhen University | And 2 more authors.
Dianli Xitong Baohu yu Kongzhi/Power System Protection and Control | Year: 2012

This paper presents a new method for loss estimation of distribution systems comprising overhead lines and power cables. It is based on fast independent component analysis (Fast ICA) and support vector regression (SVR). In the method, the length of over-head lines, length of power cable, active and reactive powers entering the sending end of the feeder are taken as the input characteristic parameters to estimate the loss of distribution network. The Fast ICA is employed to extract the independent components of the input characteristic parameters. The independent component of characteristic parameter and power loss are taken as the input and output of SVR to build the loss estimation relation of hybrid feeder. The simulation result of actual measurements shows that the proposed method is accurate, valid, and feasible.


Sun Z.,Sanmenxia Power Supply Company | Xue Y.,Sanmenxia Power Supply Company | Guo H.-W.,Sanmenxia Power Supply Company
Gaoya Dianqi/High Voltage Apparatus | Year: 2010

This paper introduced the occurrence, the cause of misconduct and the consequence of a 126 kV GIS equipment fault. The real cause of the fault was analyzed, and some problems in dealing with the fault were pointed out. Consequently, some notable factors in the processes of ordering, manufacturing, daily operation management, and fault analysis for the GIS equipment were concluded to guarantee its safe operation.


Li K.,Xidian University | Feng H.,Sanmenxia Power Supply Company | Li Y.,Aeronautics Computing Technique Research Institute | Zhang Z.,Xidian University
Proceedings - 2014 10th International Conference on Computational Intelligence and Security, CIS 2014 | Year: 2015

A new generation of avionics system has three major technical characteristics of high resource sharing, data integration and software intensive. However, in the cooperative combat environment, which has the problem of potential sensitive information leakage and tamper when the combat aircraft communicate with each other. In this paper, we are based on the single node of information flow control model, combined with PCS, proposed a distributed information flow control model in MILS, constructed the PCS information flow control strategy, and together with other trusted component of information flow control strategy that form the multi-level information flow control policy framework, which design an information flow control mechanism of PCS and realized the distributed information flow control in MILS. After analysis and verification, the design of the distributed information flow security control method in MILS can effectively ensure the confidentiality and integrity of the information among the nodes. © 2014 IEEE.


Li K.,Xidian University | Feng H.,Sanmenxia Power Supply Company | Li Y.,Aeronautics Computing Technique Research Institute | Zhang Z.,Xidian University
Proceedings - 2014 10th International Conference on Computational Intelligence and Security, CIS 2014 | Year: 2015

MILS (Multiple Independent Levels of Security) is a high-assurance architecture that protect different security levels information sharing. In order to provide guarantee for a variety of information sharing security, MILS allow software components that have multiple security levels or multiple data domain to run on a single processor. But in specific applications, in order to achieve multiple information interaction and sharing between partitions, the problem of which illegal authorization, unauthorized access and malicious disclosure of sensitive information between different levels of applications will be introduced. From the point of information flow control, the paper put forward a model and method of information flow security control strictly between MILS partitions based on trusted computing. We designed a model based on BLP and access control model of state transition strategy, the policies break the traditional BLP model rules ' read down, write up', which meet the needs of the security level for subjects and objects according to the changes of task requirements in MILS. After analyzing, the model can efficaciously protect confidentiality and integrity of the sensitive information, and improve the dependability of the whole system. © 2014 IEEE.


Nan G.,Sanmenxia Power Supply Company | Zhang S.,Sanmenxia Power Supply Company | Lin Y.,Sanmenxia Power Supply Company | Zhang G.,Sanmenxia Power Supply Company
Energy Procedia | Year: 2011

This thesis analyzes the development trend of power fiber to the home (PFTTH) and the current domestic situation of the integration of three networks. It develops its research about the integration system constitution of three networks based on power fiber to the home and proposes the research, development and implementation of power fiber to the home, which not only establishes new "information highway" based on the smart power grid, but also guarantees the realization of the state's planning objective of the integration of three networks to enable the rapid development of information industry in China. © 2011 Published by Elsevier Ltd.

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