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Wang G.-Y.,Xian Xirui Protection and Control Co. | Han F.-L.,Xi'an University of Science and Technology | Gao L.,Xian Power Supply Bureau | Yun B.-J.,Xian Xirui Protection and Control Co. | And 3 more authors.
Dianli Xitong Baohu yu Kongzhi/Power System Protection and Control | Year: 2011

This paper designs a ECVT based distributed network spare power automatic switching plan for single bus sectionalized system based on GOOSE network using IEC61850 standard and associated with the secondary characteristic of analog output of ECVT. It expatiates the principle of spare power automatic switching, the charging and discharging conditions, action logics and abnormal voltage loop in automatic switch of the incoming line switching and automatic switch of sectionalized switch respectively by using the configuration and scheme of bay level devices. The plan can simplify secondary cable wiring and economize bay level devices, also can be directly applied to IEC61850-based digital substation or switching station, and has certain practical value.


Zhao Y.,Shaanxi Electrical Power Maintenance Company | Yun B.,Xian Xirui Protection and Control Co. | Zheng F.,Xian Xirui Protection and Control Co. | Li L.,Xi'an University of Science and Technology | And 2 more authors.
Gaoya Dianqi/High Voltage Apparatus | Year: 2014

The principle of synchronous closing technique is discussed by example of synchronous closing capacitor in this paper. How to forecast the closing time accurately is the key point of the synchronous closing technology system. The factors that influence moving time of permanent magnetic actuator have been analyzed. The algorithm that forecasts moving time of permanent magnetic actuator by using least-square has been presented and the mathematical model is built to predict the closing time. The result of experiment shows that least-square with forecasting the closing time is practicable.


Chen H.-D.,Ningxia Electrical Power Company | Yun B.-J.,Xian Xirui Protection and Control Co. | Dai W.-Z.,Ningxia Electrical Power Company | Wang S.-B.,Ningdong Power Supply Bureau | Chen X.-J.,Ningxia Electrical Power Company
Dianli Xitong Baohu yu Kongzhi/Power System Protection and Control | Year: 2013

In the traditional 10 kV switch substation, the inlet and outlet current protection are difficult to cooperate, thus this paper proposes that the outlet fault locks the inlet protection based on GOOSE. For the inlet protection, the GOOSE based inlet backup power switchover units are integrated into busbar backup power switchover units, and it does not need exclusive backup power switchover units, which saves equipment investment. The function of automatic sequence load shedding through distributed GOOSE information is added to the inlet protection. The method of outlet fault locking inlet protection, network backup power switchover units and automatic sequence load shedding are all applied in the field. The networked backup power switchover units and automatic sequence load shedding have achieved good results.


Fan J.,Xian University of Posts and Telecommunications | Luo S.-B.,Henan University of Science and Technology | Niu L.-T.,Thermal Power Research Institute | Yun B.-J.,Xian Xirui Protection and Control Co.
Dianli Xitong Baohu yu Kongzhi/Power System Protection and Control | Year: 2013

A transient fault information based IED integrating protection, fault location, fault record, measurement and control functions for transmission line is proposed. IED hardware scheme adopts multiple CPU distributed structure, and includes mainly the following modules: process level communication module, protection module, fault location and record module, measurement and control module, station level communication module and a MMI module. Transient fault information utilization is illustrated in detail, which is mainly reflected in the protection module and the fault location and record module. Some key techniques are used to meet the smart substation development requirements. The multifunctional integrated IED can be applied in the existing smart substations, which can improve protection performance and fault location precision, and reduce equipment cost and operation and maintenance cost.


Ren X.-X.,Xian Power Supply Company | Luo S.-B.,Henan University of Science and Technology | Ma S.-F.,China Coal Pingshuo Coal Co. | Yun B.-J.,Xian Xirui Protection and Control Co.
Dianli Xitong Baohu yu Kongzhi/Power System Protection and Control | Year: 2011

Because practical transmission systems and fault situations are rather complex, non-unit transient based protection of transmission line is difficult to reliably protect the whole line. On the basis of illustrating the principle of non-unit transient based protection, according to the characteristic that the transmitting modes of the traveling waves generated by the same fault type in transmission line are similar, the method to improve internal-fault right discriminating rate of non-unit transient based protection is presented, which is that making sure forward external faults are reliable non-operation and set respectively in terms of fault types. And the ATP simulation tests of 500 kV EHV transmission system are conducted. The results show that the new method is able to improve the internal-fault right discriminating rate of non-unit transient based protection effectively.


Zou G.,Shandong University | Wang X.,Yantai Longyuan Power Technology Co. | Gao H.,Shandong University | Yun B.,Xian Xirui Protection and Control Co.
Dianli Zidonghua Shebei/Electric Power Automation Equipment | Year: 2010

A busbar protection scheme with distributed calculation and local control is proposed for digital substation based on IEC61850. Its overall configuration without master station is constructed according to the technical characteristics of digital substation. The data transmission characteristics of samples and GOOSE are analyzed and the process bus which connects the devices of process layer and the protection equipment of bay layer is designed based on Ethernet technology. The principle of instantaneous current differential protection is applied in the calculation of distributed busbar protection, which takes the advantage of unsaturated current transducer. Analysis shows that the proposed scheme has simple structure, high reliability and feasibility.


Luo S.B.,Henan University of Science and Technology | Lu G.J.,Yichuan Power Supply Company | Tian S.Y.,Yichuan Power Supply Company | Hong Y.,Yichuan Power Supply Company | And 2 more authors.
IET Conference Publications | Year: 2012

A transient fault information based IED integrating protection, fault location, fault record, measurement and control functions for transmission line is proposed in this paper. IED hardware scheme adopts multiple CPU distributed structure, and includes mainly the following modules: process level communication module, protection module, fault location and record module, measurement and control module, station level communication module and a MMI module. Transient fault information utilization is illustrated in detail, which mainly reflected in the protection module and the fault location and record module. Some key techniques are used to meet the smart substation development requirements. The multifunctional integrated IED can apply in the existing smart substations, improve protection performance and fault location precision, reduce equipment cost and operation and maintenance cost.


Han F.-L.,Xi'an University of Science and Technology | Huang R.-C.,Xian Power Supply Bureau | Zhang H.,Xian Xirui Protection and Control Co. | Yun B.-J.,Xi'an University of Science and Technology | Yun B.-J.,Xian Xirui Protection and Control Co.
Dianli Xitong Baohu yu Kongzhi/Power System Protection and Control | Year: 2010

IEC61850 standard provides a means to implement the interoperability between intelligent electronic devices (IED) from different manufacturers and the systems seamless integration, but protection modeling of IEC61850 is incompatible with the practical engineering application. On the basis of introducing IEC61850 object-oriented modeling techniques and IED modeling ideas, this paper summarizes the encountered problems of the IED modeling in engineering application: soft plate modeling, logic node modeling, data expansion, GOOSE modeling and logical device modeling. Combining with National Grid's latest release "Technical Specifications of DL/T 860 in Engineering", some effective and feasible solutions have been proposed to solve these difficult problems, and a middle-voltage line protection model instance is given, which is able to meet the project needs of digital substation construction.


Zheng F.,Xi'an University of Science and Technology | Lu J.-T.,China Coal Xian Design Engineering Co. | Gao L.,Xian Power Supply Bureau | Yun B.-J.,Xian Xirui Protection and Control Co.
Dianli Xitong Baohu yu Kongzhi/Power System Protection and Control | Year: 2010

This paper designs a scheme of redundant network communication based on IEC60870-5-103 transmission protocol and embedded ucLinux platform, which is applied to microcomputer-based relay protection devices. The scheme adopts a pair of Ethernet ports, one of which is the other's standby in hardware design, and makes use of socket programming in Linux system and data sharing or backup to achieve redundant network communication aiming at several host computers in software design. The basic application function of protocol 103 is analyzed, and aiming at the special problem about the application function in redundant network communication, the solutions to the practice of application function are proposed. The application in protection devices indicates that the scheme can improve the reliability of communication.


Yu J.-X.,Xian Xirui Protection and Control Co. | Zhang H.-T.,Xian Xirui Protection and Control Co. | Ge Y.-Z.,Xi'an Jiaotong University | He Z.-H.,Xian Xirui Protection and Control Co. | Yun B.-J.,Xian Xirui Protection and Control Co.
Dianli Xitong Baohu yu Kongzhi/Power System Protection and Control | Year: 2010

In order to improve the reliability of transformer current differential protection, this paper proposes a new adaptive transformer current differential protection criterion based on the analysis of electric characteristic when the transformer is in faults. It can automatically increase the brake coefficients when the external faults occur, while decrease them and improve the sensitivity of differential protection when the internal faults occur adaptively. At last, simulation on RTDS verifies the effectiveness of adaptive criterion.

Loading Xian Xirui Protection and Control Co. collaborators
Loading Xian Xirui Protection and Control Co. collaborators