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Huang Z.,Beijing Electric Power Company
ICHVE 2012 - 2012 International Conference on High Voltage Engineering and Application | Year: 2012

Insulating oil plays an important role of insulation in transformers. However, copper sulphide deposition on oil-paper insulation can lead to insulation failures in power transformers. In order to research the corrosive properties after adding dibenzyl disulfide (DBDS) and 2, 6-Di-tert-butyl-4- methylphenol (DBPC), and the ability of inhibiting corrosion after adding metal deactivator in transformer oil, a series of thermal aging tests are carried on a certain brand of Nynas and Karamay oil in this paper. First of all, testing the corrosive sulfur compounds by ASTM D1275B method; And Nynas oil test after adding a certain amount of metal deactivator is made at 90°C to analyze the changing of dissolved gas-in-oil content is analyzed. Experiments and analysis results show that DBDS instead of DBPC is the corrosive sulfur compounds; Metal deactivation agent can effectively prevent the occurrence of sulfur corrosion, but it consumes rapidly with the thermal aging; the oil dissolved gas content significantly changes after adding metal deactivator in oil. All of the above results can be the foundation for a further study on corrosive sulfur and control measure in transformer oil. © 2012 IEEE.


Wu L.,North China Electrical Power University | Zhang J.,North China Electrical Power University | Liu R.,Beijing Electric Power Company
Dianli Xitong Zidonghua/Automation of Electric Power Systems | Year: 2012

A reliability model of wind farm is proposed. The output of wind farm is considered to obey a joint probability distribution of available capacity and available wind energy. In this study, the wind farm is equivalent to a multi-state conventional unit by dispersing the output into several derating output levels. The model allows the simulation of wind farms containing either identical or different wind turbine types. The model can be easily used in the power system reliability assessment utilizing analytical or simulation methods to simplify the reliability assessment of power system containing large-scale wind farm. Finally, a case study is carried out on IEEE-RTS 79 test system to verify the effectiveness of the model. ©2012 State Grid Electric Power Research Institute Press.


Zhao Y.,North China Electrical Power University | Xue F.,North China Electrical Power University | Zhao X.,Beijing Electric Power Company | Guo T.,North China Electrical Power University | Li X.,North China Electrical Power University
Journal of Hazardous Materials | Year: 2013

A novel method has been developed to remove elemental mercury from simulated flue gas by a diperiodatonickelate (IV) solution. The influencing factors, such as diperiodatonickelate (IV) concentration, reaction temperature, solution pH, the initial Hg0 concentration, SO2 concentration and NO concentration were investigated at a bubbling reactor. In the presence of SO2 and NO, removal efficiency of 86.2% for elemental mercury was obtained. Meanwhile, 56.2% of NO and 98% of SO2 were simultaneously removed, under the optimal experimental conditions, in which diperiodatonickelate (IV) concentration was 6×10-3mol/L, reaction temperature was 50̊C, the initial Hg0 concentration was 20μg/m3 and pH was 8.5. Moreover, based on the research results of the hydrolyzing products of IO4-, and the analysis of the removal products of Hg0, the reaction mechanism of Hg0 removal was proposed. © 2013 .


Patent
State Grid Corporation of China, Beijing Electric Power Company and Beijing Electrical Power Research Institute | Date: 2015-10-14

The invention provides a mixed-mode temperature measurement communication phase conductor and a temperature measurement communication system. The mixed-mode temperature measurement communication phase conductor includes: a stainless sleeving optical unit and a support line hinged with the stainless sleeving optical unit, wherein an aluminium wire is hinged outside the stainless sleeving optical unit and the support line; the stainless sleeving optical unit includes: multiple single-mode fibres and at least one multi-mode fibre, wherein fibres in the stainless sleeving optical unit are mutually hinged. The invention realizes whole-distance temperature measurement of conductor by setting the single-mode fibre to perform communication and the multi-mode fibre to perform temperature measurement.


Patent
State Grid Corporation of China, Beijing Electric Power Company and Beijing Electrical Power Research Institute | Date: 2013-07-16

The disclosure provides a mixed-mode temperature measurement communication phase conductor and a temperature measurement communication system. The mixed-mode temperature measurement communication phase conductor includes: a stainless sleeving optical unit and a support line hinged with the stainless sleeving optical unit, wherein an aluminium wire is hinged outside the stainless sleeving optical unit and the support line; the stainless sleeving optical unit includes: multiple single-mode fibres and at least one multi-mode fibre, wherein fibres in the stainless sleeving optical unit are mutually hinged. The disclosure realizes whole-distance temperature measurement of conductor by setting the single-mode fibre to perform communication and the multi-mode fibre to perform temperature measurement.


Patent
Beijing Electrical Power Research Institute, Sinopec, State Grid Corporation of China and Beijing Electric Power Company | Date: 2012-01-20

Disclosed in the disclosure are a method and a device for processing geological information. The method for processing the geological information comprises: acquiring multiple geological image graphs; determining the relation between the image coordinate and the ground coordinate of each of the multiple geological image graphs by an imaging mode of geological images; and joining the multiple geological image graphs together according to the relation between the image coordinate and the ground coordinate of each of the multiple geological image graphs. The large-scale ground images can be acquired by processing the geological images according to the present disclosure.


Patent
State Grid Corporation of China, Beijing Electric Power Company and Beijing Electrical Power Research Institute | Date: 2013-07-16

A meter circuit apparatus and a method for implementing metering are disclosed, wherein the apparatus includes: an electric energy meter (1), a combining unit (2) and a current transformer (3), wherein the current transformer (3) is connected to the combining unit (2) and the electric energy meter (1) and is configured to acquire an electrical quantity of a intelligent substation, and input the electrical quantity to the combining unit (2) and the electric energy meter (1); the combining unit (2) configured to combine and synchronize the electrical quantity inputted by the current transformer (3), and forward a processed digital signal in a specific format; and the electric energy meter (1) is configured to charge for the electrical quantity inputted by the current transformer (3). Requirements of regular metering and intelligent measurement are satisfied within adding an independent current transformer (3).


Patent
Beijing Electrical Power Research Institute, Beijing Electric Power Company, State Grid Corporation of China and Sinopec | Date: 2014-03-26

Disclosed in the invention are a method and a device for processing geological information. The method for processing the geological information comprises: acquiring multiple geological image graphs; determining the relation between the image coordinate and the ground coordinate of each of the multiple geological image graphs by an imaging mode of geological images; and joining the multiple geological image graphs together according to the relation between the image coordinate and the ground coordinate of each of the multiple geological image graphs. The large-scale ground images can be acquired by processing the geological images according to the present invention.


Gong Y.,Zhejiang University | Wu H.,Zhejiang University | Yang K.,Beijing Electric Power Company
Dianli Xitong Zidonghua/Automation of Electric Power Systems | Year: 2013

A power network partition method based on power flow tracing and agglomerative algorithm is proposed. Through reactive power flow tracing, the method can be used to identify the reactive power from each source to each load and hence quantify the degree of reactive power coupling between different nodes, and the distance between nodes can be thus defined. Agglomerative algorithm is then used to aggregate nodes and the best number of partition can be identified. The method is validated through case studies using the IEEE 39-bus and IEEE 118-bus system. The obtained partition can ensure a basically balanced reactive power within each area and change as system operation condition changes. The method has high computational efficiency and hence has the potential of practical application. © 2013 State Grid Electric Power Research Institute Press.


Gao M.,State Grid Corporation of China | Hui D.,China Electric Power Research Institute | Gao Z.,NARI Group | Lei W.,Beijing Electric Power Company | And 2 more authors.
Dianli Xitong Zidonghua/Automation of Electric Power Systems | Year: 2013

The national wind/photovoltaic/energy storage and transmission demonstration project is a large four-in-one renewable energy project, viz wind power, photovoltaic power, energy storage and transmission. The project is designed to build a hundred-megawatt-level wind farm, photovoltaic power station and energy storage station. Focusing on the scale and composition of wind power, photovoltaic and energy storage of the demonstration project, this paper describes the multi-configuration mode of operation and the switch conditions between different modes while analyzing the four control strategies of wind power, photovoltaic power and energy storage systems joint operation, namely, smoothing output power fluctuation, peak shaving and valley filling, tracking dispatch plan generation and power system frequency modulation, which are verified with actual operating results. It is proved by theory and practice that the combined power generation mode of wind, photovoltaic and energy storage is practical and capable of meeting the actual requirements on grid-connected renewable energy. This will be one of the leading directions for the development of new energy. And the wind/photovoltaic/energy storage and transmission demonstration project is a good demonstration of large-scale grid-connected new energy. © 2013 State Grid Electric Power Research Institute Press.

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