Henan Pinggao Electrical Co.

Pingdingshan, China

Henan Pinggao Electrical Co.

Pingdingshan, China
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Cheng X.,Beijing Electrical Power Research Institute | Guan Y.,Tsinghua University | Zhang W.,Tsinghua University | Tang C.,Henan Pinggao Electrical Co.
Diangong Jishu Xuebao/Transactions of China Electrotechnical Society | Year: 2014

The mechanical state of high voltage circuit breaker can be reflected by its vibration signals during operation. The starting moment of vibration events extracted from the vibration signal can be taken as the characteristic parameter. The factor analysis can optimize and reduce the dimension of the characteristic parameters. The support vector machine (SVM) optimized by particle swarm optimization (PSO) can classify the different states of the circuit breaker. Several mechanical failures of circuit breaker are simulated and the results show that the factor analysis and SVM are suitable for mechanical state diagnosis of high voltage circuit breaker.


Tian J.-H.,Tsinghua University | Sha Y.-C.,Tsinghua University | Zhou Y.-X.,Tsinghua University | Sun Y.-Z.,Henan Pinggao Electrical Co. | And 2 more authors.
Gaodianya Jishu/High Voltage Engineering | Year: 2011

The electric field calculation is important to the structure optimization of the disconnecting switch, the control of the corona loss, the audible noise, and the radio interference level. Consequently, the ANSYS software was used to calculate the AC and DC electric field distribution and to determine the value and the position of the maximum electric field. On the basis of static electric field theory, in the DC field calculation, the steady conduction current field theory was used to calculate the potential distribution on the surface of the disconnector. When the resistivity ratio between different materials was beyond 10 orders of magnitude, the problem of divergent values solved by ordinary finite element method would occur. Therefore, it was proposed that, according to the structure feature of the disconnector, the floating potential of the metal connectors was obtained by calculating the resistances of the supporting insulators firstly. Then the surface potential of the insulators was derived, which was in linear relation with the surface distance. Secondly, with the surface potential distribution of the disconnector, the ANSYS sub-modeling technique was adopted to calculate the electrostatic field distribution in the air domain. Hence, the coupling between conduction current field and static electric field was achieved. Finally, the AC and the DC field results were summarized and compared. The DC field simulation results show that the potential distribution at the interface between disconnector and air domain is continuous, which verifies proposed method.


Dong E.,Dalian University of Technology | Zhao J.,Henan Pinggao Electrical co. | Bi Y.,Henan Pinggao Electrical co. | Wang Y.,Dalian University of Technology | Duan X.,Dalian University of Technology
Advanced Materials Research | Year: 2013

This paper has proposed a novel high speed switch gear (NHSSG) whose contacts could detach quickly; it exploits the principle of the repulsion force generated by eddy effect. The NHSSG is mainly used in the hybrid switch gear (HSG) to cut off the fault circuit cooperate with the solid state thyristor switch gear (SSTSG) in a short time, so it is important for the NHSSG to motion at a certain time. Consequently, a lot of experiments have been done in different aspects to find out the impact extent of the six factors to the actuation time of the NHSSG, and the three-phase switching synchronous operation (TPSSO) experiments have been done based on the result of the analysis, and the accurate three-phase switching synchronous operation was obtained at last. © (2013) Trans Tech Publications, Switzerland.


Liu X.,Shenyang University of Technology | Leng X.,Shenyang University of Technology | Cao Y.,Shenyang University of Technology | Song C.,Henan Ping Gao Electrical Co.
Diangong Jishu Xuebao/Transactions of China Electrotechnical Society | Year: 2012

The arc is developed in the circuit breaker during the short circuit breaking, and the energy effective dissipation of the arc can directly affect the dielectric recovery characteristics. For qualitatively reflecting the transonic, variable boundary, variable gas flow path, the turbulent flow characteristics and the dynamic behavior of the arc occurring and developing under the short circuit breaking, the equivalent unit cell dynamic arc model was proposed and applied in this paper, and finite volume method was used as the multiple-physical fields simulation tool, the nonlinear arc quenching flow movement behavior of the breaking process was simulated. Moreover, the chaos theory was used to analyze the gas flow parameters of the breaking process, and the existence of arc chaotic characteristics in the arc burning process was identified and obtained.


Zhong J.-Y.,Henan Pinggao Electrical Co.
Gaoya Dianqi/High Voltage Apparatus | Year: 2013

Smart high-voltage switchgear is one of the core equipment of smart substation. With the comprehensive construction of smart substation, the smart high-voltage switchgear technology is also in constant improvement and development. In this paper, based on the technical characteristics and existing problems of the high-voltage switchgear as the starting point, combined with the latest research results, the characteristics of the new generation smart high-voltage switchgear are introduced, such as the more integrated technology between primary and secondary equipment, making system structure more simplification, expanding the advanced application functions and so on. The further development direction of the smart high-voltage switchgear is forecasted.


Cao Y.-L.,Henan Pinggao Electrical Co.
Gaoya Dianqi/High Voltage Apparatus | Year: 2011

A kind of mechanical three-pole-gang-operation SF 6 circuit breaker with hydraulic mechanism was developed based on present 252 kV self-energized single-pole-operation SF 6 circuit breaker with spring mechanism, and a suitable hydraulic mechanism and its transmission structure were selected through calculation to make it match with the no-load characteristic of single-pole-operation circuit breaker for simplifying the test. The emphases were given to the equations for calculating the related physical quantities in opening process of the circuit breaker, and the programming and computation of no-load characteristic of the three-pole-gang-operation circuit breaker based on the equations. The characteristic curves of several different hydraulic mechanisms were calculated and compared with the referenced mechanical characteristic curves. It is shown that the calculated results for selecting the hydraulic mechanism and its transmission structure meet the requirement of simplifying the test. This study may facilitate the product design.


Ma Y.-X.,Henan Pinggao Electrical Co. | Wang Z.-J.,Henan Pinggao Electrical Co. | Wang H.-M.,Henan Pinggao Electrical Co.
Gaoya Dianqi/High Voltage Apparatus | Year: 2011

It is necessary for Chinese HV switchgears manufacturers to research and develop DC switchgears independently to meet the requirements of the rapid development of DC transmission and transforation projects in China. This paper described the development of DC transmission and the basic information of DC field equipment in China, with the emphases on the low-voltage-side 50 kV DC disconnector's technical performance, parameters, current flux, and transmission design and calculation, as well as selection of DC insulators in order to benefit the development and design of the DC switchgears in China.


Zhang J.-M.,Henan Pinggao Electrical Co. | Yin J.-H.,Henan Pinggao Electrical Co. | Jiang X.-X.,Henan Pinggao Electrical Co.
Gaoya Dianqi/High Voltage Apparatus | Year: 2013

High voltage switchgear is one of the most important control and protection equipments for reliable and stable operation of high-voltage power transmission system. In this study, a RBF (radial basis function)-based reliability assessment model of high-voltage switchgear was proposed according to common faults of high voltage switchgear. A self-developed intelligent prototype of 126 kV intelligent GIS was employed to verify the proposed model. Experimental results show that, compared with BP neural network, RBF neural network has better abilities of learning and classification, faster training speed, and lower error rate. The proposed RBF-based reliability assessment model is expected to be widely used in state assessment of high-voltage switchgear.


Zhong J.-Y.,Henan Pinggao Electrical Co.
Gaoya Dianqi/High Voltage Apparatus | Year: 2013

A system simulation model is built with the device parameters from the Xiangjiaba-Shanghai HVDC Transmission Demonstration Project. The over-voltage generation mechanism and its distribution induced by three typical open circuit faults, i.e. the power absence of inverter substation, the open circuit of neutral line, and the open circuit of metal loop, are analyzed with the model. Moreover, aiming at the delay of protecting start-up and the operation delay of rapid grounding switch, a control method of over-voltage is presented. This study may be of help to the optimization of arresters layout for the following HVDC project.


Gu G.,Henan Pinggao Electrical Co.
Gaoya Dianqi/High Voltage Apparatus | Year: 2015

This paper briefly describes the function of transmission ratio calculation in mechanical characteristic analysis of a circuit breaker, and introduces an analytic calculation method of the transmission ratio. Taking a crank mechanism of circuit breaker for example, the transmission ratio of the mechanism is calculated, and the corresponding mathematical expressions are derived. The expressions can be used for convenient calculation and analysis of circuit breaker's moving mechanisms. ©, 2015, Xi'an High Voltage Apparatus Research Institute. All right reserved.

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