Time filter

Source Type

Zhou Y.,Jinshan Power Supply Company | Zhu M.-J.,Jinshan Power Supply Company | Yuan P.,XiAn MaoRong Power Equipment Co. | Li Y.-M.,Xi'an Jiaotong University
ICHVE 2016 - 2016 IEEE International Conference on High Voltage Engineering and Application | Year: 2016

In this paper, pulse source separation and location technology for ultra-high frequency (UHF) partial discharge (PD) based on three-dimensional vector of pulse amplitude (TDVPA) in time domain is presented, while PD pulse sequences are detected or measured synchronously by three channels respond to ABC power voltage. Sub pulse sequences can be obtained using an unsupervised clustering analysis to the 3D correlation graph of TDVPA in time domain, then identification and analysis is applied to the PRPD pattern of each sub pulse sequence, which forms a novel separation and location technology for UHF PD. The results of simulation research show that this novel technology has strong pulse source separation ability to deal with PD interference and multi-sources problem, with giving the PD location. © 2016 IEEE.


Qiu C.,Qingpu Power Supply Company | Li J.,Jinshan Power Supply Company | Pan G.,Jinshan Power Supply Company
China International Conference on Electricity Distribution, CICED | Year: 2012

In light of an 110KV indoor GIS substation of certain power supply company, two kinds of three-dimensional solid model (straight Tube-Shaped and T-Shaped) of the GIS bus-bar cylinder are established. The magnetic field, eddy current field of the established GIS bus-bar model is calculated under different conditions such as symmetry currents, asymmetric currents based on ANSYS/EMAG. By the simulation, we get the magnetic intensity distribution of the GIS bus-bar, the eddy current distribution of the GIS bus tube distribution and the power losses on different situations. According to the calculation result of the power losses, the SF6 fluid, temperature field of the GIS bus-bar is analyzed and calculated by the FLUID142 element of ANSYS. In order to verify the accuracy of the calculation results, the simulation of the GIS tube temperature is compared with the actual temperature measured during the GIS operation under different situations according the simulation. The simulation results are proved to have a good agreement with the measured data © 2012 IEEE.


Xue Y.,Shanghai University of Electric Power | Wang S.,Jinshan Power Supply Company
Taiyangneng Xuebao/Acta Energiae Solaris Sinica | Year: 2014

For the oscillation of the perturb and observe method at the steady state near the maximum power point, which leads to a certain error and combined with the no fluctuation of fuzzy control law in the maximum power point, which has a good dynamic and steady-state performance characteristics, the fuzzy control based on P&O was proposed to achieve maximum power tracking in this paper and it is realized on the Boost circuit. The simulation results showed that the fuzzy control based on the perturb and observe method can quickly and accurately track the maximum power point, avoiding the oscillation of the maximum power point and improving the system stability and efficiency of energy conversion.


Guo L.,Jinshan Power Supply Company | Gao S.,Jinshan Power Supply Company | Gao F.,Jinshan Power Supply Company | Zhou D.,Jinshan Power Supply Company
Proceedings of the 5th IEEE International Conference on Electric Utility Deregulation, Restructuring and Power Technologies, DRPT 2015 | Year: 2015

In recent years, the AVC technology has been widely used as a main method of centralized monitoring, analysis and calculation for reactive power and voltage state in the whole power grid. It's optimally controlled from an overall angle for wide-area distributed power grid reactive device. The AVC system of Jinshan District is based on the OPEN3000 platform. In the process of system running, we are faced with many problems. We propose the Voltage and Reactive Power closed-loop control system should aim at reducing the whole network loss and onload voltage regulating joint adjustment numbers, ensuring each node voltage qualification and the most reasonable compensation of Capacitor equipment operation, while it should also keep in the core of the Centralized Control Center (Dispatching Center or Distribution Center), to the principle of Expert system and Fuzzy control, and as a mean of on-load voltage regulating joint gear in each substation and capacitor switching regulator control and coordination. The solution effectively improved the bus voltage qualification rate and reduced the equipment operation numbers and the reactive power loss. The AVC system is running in good condition at present. © 2015 IEEE.


Lei G.,Jinshan Power Supply Company | Ming L.,Jinshan Power Supply Company | Feng G.,Jinshan Power Supply Company
China International Conference on Electricity Distribution, CICED | Year: 2014

The Automatic Voltage Control of regional power network achieves coordination and control of the whole power network's voltage and reactive power in the system, the target of which is to guarantee qualified voltage and power factor on the basis of security and stability, and to reduce active loss due to reactive power flow. According to the localization and dispersion of reactive power balance, AVC controls regional power network's voltage and reactive power in a hierarchical and sub-regional way. The AVC system of Jinshan District is based on the OPEN3000 platform. In the process of system running, we are faced with many problems, such as the decrease of bus voltage qualification rate, the cold standby state of equipment, the limit-exceeded operation number of capacitor and generator transformer, transformer and capacitor's failure for twice, decline in the power factor, etc. For each problem, we analyze it on the basis of practical situation, confirm the reason and come up with the solution that improves the bus voltage qualified rate and reduces reactive power loss. © 2014 IEEE.


Yang J.,Jinshan Power Supply Company | Lu H.,Jinshan Power Supply Company | Shi F.,Jinshan Power Supply Company
Advanced Materials Research | Year: 2013

Pumped storage is the largest-capacity form of grid energy storage available. A multi-period oligopolistic model for analyzing the bidding strategies of pumped storage GenCo (PSG) is proposed in this paper. In the pumping periods, the pumped storage unit (PSU) is simulated as a special load. While in generating periods, PSU is treated as a normal generator. In this model, all GenCos are assumed to exercise Cournot strategies to maximize their own profits. The resulting equilibrium formulation is established in terms of a mixed linear complementarity problem. The purpose of this paper is to provide an efficient simulation tool for the PSG to determine its bidding strategy in an oligopolistic environment. The proposed model can also be used to study various factors that may impact PSG's profit. Results of a six-bus test system are analyzed to illustrate the characteristics of the proposed model. © (2013) Trans Tech Publications, Switzerland.


Xu Y.,North China Electrical Power University | Lan Q.,North China Electrical Power University | Kong X.,Jinshan Power Supply Company | Hong W.,North China Electrical Power University
Diangong Jishu Xuebao/Transactions of China Electrotechnical Society | Year: 2016

In order to assess the voltage sag, analyze its impact on sensitive equipment, and develop effective mitigation measures, the full understanding of the voltage sag characteristics is necessary. However, less research work has been focused on the voltage sag characteristics, and its range and distribution are not well understood currently. In this paper, four problems, i. e. statistical analysis of characteristics, classification study, propagation calculations, and sags calculations on the load side, are researched, which aim to lay the foundation for sags assessment and treatment of the gird and sensitive equipment. Firstly, the ranges and distributions of four characteristics, including magnitude, duration, point on wave of initiation, and phase shift, are presented based on the analysis of massive voltage sag events and waveforms recorded by multiple power quality monitoring systems in China. Secondly, a more generalized voltage sags classification method considering the phase shift is proposed on the basis of original methods. Then the transformers' effects on the phase shift of various voltage sag types are studied. Finally, to simplify the sags calculation of the load and associated nodes, the superposition calculation methods concerning transforms and lines are proposed, which can treat multiple transforms and load connections and thus improve the research on the propagation characteristics of voltage sags. © 2016, The editorial office of Transaction of China Electrotechnical Society. All right reserved.


Yiwang X.,Jinshan Power Supply Company | Ying Z.,Jinshan Power Supply Company | Danhong T.,Jinshan Power Supply Company
China International Conference on Electricity Distribution, CICED | Year: 2012

In order to analyze the amplification phenomenon of harmonic currents by the traction network in an electric railway, this paper established a simplified model for traction network using T-type distributed model. Further more the conductors of the traction network were represented by a delicate multi-port model which has been reduced in ends. This model is an improvement for analyzing conductor complex compared with two-port network model. The simulation results of the resonance frequency and the amplification of harmonic currents was given by EMTP-ATP, which verified that the proposed model was an accurate and effective way for analyzing the harmonics in traction network. © 2012 IEEE.


Zhu M.-J.,Jinshan Power Supply Company | Li M.,Jinshan Power Supply Company
China International Conference on Electricity Distribution, CICED | Year: 2012

Self-healing is the basic characteristics of smart distribution grids, usually using centralized or distributed self-healing. Distributed self-healing act rapidly, can improve the reliability of power supply, but by the way, impact by operating mode, and cannot adaptive suit the distribution grid. This paper analyzes the characteristics of different self-healing model, and analysis the control strategy of distributed self-healing under typical operating modes based on a typical distribution network model. Find out a novel control strategy of distributed self-healing under dynamic operating modes of the distribution network. As a result of the new control strategy, distributed self-healing maintain rapid characteristic and not affected by operating modes. It also has self-adaptive, high reliability, real-time and other good benefits. This control strategy distributed self-healing distribution network operating system under dynamic operating modes can effectively improve power supply reliability. © 2012 IEEE.


Feng L.,Jinshan Power Supply Company | Hui-Qing L.,Jinshan Power Supply Company | Hui Z.,Jinshan Power Supply Company
China International Conference on Electricity Distribution, CICED | Year: 2012

According to the energy-saving need for power distribution station, we design an energy-saving and intelligent control, remote monitoring system. The intelligent system includes central control unit, SF6 gas sensor, temperature/humidity sensor, air conditioning, dedicated exhaust fan, automatic windows, display terminal, etc. Hardware support is mainly based on Advantech's ADAM5510 PLC and uses C programming language to achieve the function. As to the terminal display system, we choose the Kunlun Winton's MCGS TPC7062K touch screen to display data. The intelligent monitoring system designed in this paper is simple, economical, practical and can effectively reduce the energy consumption of air conditioning and ventilation system, and has some practicality and reference value in engineering and industrial control. © 2012 IEEE.

Loading Jinshan Power Supply Company collaborators
Loading Jinshan Power Supply Company collaborators