Research on Condition Monitoring of Protection System Based on Substation Area Protection

2014 ◽  
Vol 986-987 ◽  
pp. 1245-1249
Author(s):  
Shi Yong Wang ◽  
Ting Ting Shi
Keyword(s):  
Condition Monitoring ◽  
Electronic Device ◽  
Current Transformer ◽  
Protection System ◽  
Merging Unit ◽  
Current Information ◽  
Intelligent Terminal ◽  
Electronic Current ◽  
The Status ◽  
Intelligent Electronic Device

Protection equipment in intelligent substation includes Merging Unit, protection equipment and Intelligent Terminal. At present, the status of the intelligent electronic device in intelligent substation protection system is still lack of effective monitoring means. According to the characteristics that substation area protection can obtain current information of all circuits in substation through GOOSE network, a protection system conditioning monitoring relay named PSCMR is designed in this paper. Based on the principle of current differential, PSCMR can accurately identify the abnormal condition or malfunction of Merging Unit or Electronic Current Transformer and realize condition monitoring of intelligent electronic device in protection system.

The Development about Multifunction Merging Unit Used in Smart Substation

2014 ◽  
Vol 1070-1072 ◽  
pp. 1391-1397
Author(s):  
Chen Fan ◽  
Yi Min Ni ◽  
Guo Qing Zhao
Keyword(s):  
Current Transformer ◽  
The State ◽  
Good Effect ◽  
Voltage Transformer ◽  
Intelligent Diagnosis ◽  
Merging Unit ◽  
Electronic Current Transformer ◽  
Electronic Current ◽  
Status Signal ◽  
Smart Substation

The merging unit is used to realize the digitalization and sharing of the data of process and is widely used with the electronic voltage transformer (EVT) and electronic current transformer (ECT). As the construction of smart substation which is presented by the state grid company of china, a serial new requirements and needs about the merging unit are proposed and the merging unit which only sends the sampling value can not meet it. The new demands of the smart substation are analyzed, The design of hardware and the implement of the function are presented. The multifunction which including the model of sampling, the data catenation, the acquisition of status signal through GOOSE , the voltage parallel and switching and the synchronization of device are analyzed in detailed. At the end, the function of intelligent diagnosis and debug is introduced. The device has been used in the project of smart substation and takes good effect.

Study on Testing System for Real-Time of Communication of the Digital Substation's Secondary Equipments

2013 ◽  
Vol 420 ◽  
pp. 401-406
Author(s):  
Zhan Sheng Wang ◽  
Xin Zhao ◽  
Jian Jun Gao ◽  
Pan Yang ◽  
Wei Xu ◽  
...  
Keyword(s):  
Real Time ◽  
Electronic Device ◽  
Testing System ◽  
Current Transformers ◽  
Testing Method ◽  
Electronic Current ◽  
Function Design ◽  
Intelligent Electronic Device ◽  
Electronic Current Transformers

Digital substations primary equipments make use of many intelligent primary equipment, for example, Electronic Transformers (including Electronic Voltage Transformers EVT and Electronic Current Transformers ECT,which meet the standards IEC 60044-7/8),intelligent switch and so on,digital substations secondary equipments include many IED(Intelligent Electronic Device). This thesis studys on the function,design,hardware and testing method of the testing system for real-time of communication of the digital substations secondary equipments.

Transformer Differential Protection Applications of the Applicant Electronic Current Transformer

2014 ◽  
Vol 644-650 ◽  
pp. 3818-3820
Author(s):  
Li Xue Mei
Keyword(s):  
Current Transformer ◽  
Basic Function ◽  
Electromagnetic Current ◽  
Differential Protection ◽  
Merging Unit ◽  
Electronic Current Transformer ◽  
Electronic Current ◽  
Measurement Principle ◽  
Current Unbalance ◽  
Transformer Differential Protection

This paper mainly analyses, improvement and experiment using the device of Wuhan Hua gong Electric Automation Co., Ltd. existing. As a comparison, this paper firstly analyzes the measuring principle of electromagnetic current transformer and the saturation problem, coil measurement principle and error, a brief summary of the distinction between the two. One time, two times of converter and the merging unit as part of electronic current transformer, this paper also made some analysis. Then analyzed some improvement of transformer differential protection of electronic current transformer based on improved. Firstly, the hardware protection data interface part of, through the analysis of the reasonable selection, then it is based on transformer differential protection of electronic current transformer, the two line ratio braking curve formulation through the analysis of unbalanced current sources, make do with electromagnetic current transformer current unbalance and the ratio braking curve based on the comparative analysis. Finally, the relay protection software the program is changed the basic function of the device is tested, the test results showed that the improved protection device.

The Develop of Intelligent Electronic Device Platform for Transformer Multi-Condition Monitoring

2014 ◽  
Vol 543-547 ◽  
pp. 1050-1056
Author(s):  
Hong Jie Wang ◽  
Jian Gang Bi ◽  
Yuan Yang ◽  
Ning Yang
Keyword(s):  
Condition Monitoring ◽  
Electronic Device ◽  
Communication Protocol ◽  
Design Method ◽  
Good Reliability ◽  
Monitoring Parameter ◽  
Intelligent Electronic Device ◽  
Threshold Setting ◽  
High Degree ◽  
Monitoring Platform

The intelligent electronic device used for transformer multi condition monitoring platform was designed based on IEC61850 communication protocol. Based on the analysis of condition monitoring parameter, the overall program and module function were elaborated, the function and design method of signal conditioning module, data acquisition and transformer system, threshold setting were discussed in detail. The intelligent electronic device platform can realize comprehensive monitoring of multi state parameters of transformers. The monitored data will be uploaded automatically in case of the monitoring parameters overrunning. The platform is of a high degree of intelligence, good reliability, flexibility, versatility, and scalability.

Research on Electrical Power System with Information Modeling and SCL Description of IED for Transformer Condition Monitoring Based on IEC61850

2013 ◽  
Vol 676 ◽  
pp. 177-180
Author(s):  
Yun Tao Sun ◽  
Xin Jian Tang ◽  
Jue Long Li ◽  
Xiu Chen Jiang
Keyword(s):  
Power System ◽  
Condition Monitoring ◽  
Electronic Device ◽  
Electrical Power ◽  
Information Modeling ◽  
Insulation Material ◽  
Electrical Power System ◽  
Description Language ◽  
Reporting Service ◽  
Intelligent Electronic Device

A transformer is a critical device in an electrical power system substation. Monitoring its condition, including insulation material statuses, is imperative. This article discusses the information modeling techniques of IEC61850 and modeling steps of condition-monitoring IED, analyzes the reporting service, focuses on the characteristics of transformer condition monitoring, rationally develops and makes use of logical nodes and data in the IEC61850 standard, conducts modeling for the actual intelligent electronic device (IED) of transformer condition monitoring and describes the model with substation configuration description language (SCL). The configuration file of this model has passed the test done with standard syntax (Schema mode).

Disturbance Voltage Induced on the Intelligent Electronic Device Ports due to Switching Operations in Gas Insulated Substation

2015 ◽  
Vol 734 ◽  
pp. 653-658
Author(s):  
Jian Fei Ji ◽  
Xiao Fan Liu ◽  
Yu Bo Yuan ◽  
Yi Fei Yang ◽  
Chong Qing Jiao
Keyword(s):  
Electromagnetic Compatibility ◽  
Electronic Device ◽  
Electromagnetic Coupling ◽  
Current Transformer ◽  
Electromagnetic Disturbance ◽  
Compact Structure ◽  
Transient Electromagnetic ◽  
Intelligent Electronic Device ◽  
Gas Insulated Substation ◽  
High Degree

There is great concern on the electromagnetic compatibility problem of electronic equipments in an intelligent substation, due to the compact structure resulted from high degree of integration between the primary electrical equipments and secondary electronic equipments. The very fast transient electromagnetic disturbance (VFTED) resulted from the gas insulated substation (GIS) switching operation has potential impact on the electronic equipments by the electromagnetic coupling between the VFTED and the circuit of “sensor-cable-intelligent electronic device (IED)”. This paper presents both experimental and theoretical results of the disturbance voltage induced on the ports in control cabinets during the disconnectors operating in a 500kV GIS substation. The considered ports are connected to a current transformer (CT) equipped nearby GIS switcher via a KVVP cable. The results show that the peak value, the duration time and the frequency range of the transient waveform are about 400V, 2 μs, and below 40 MHz.

scholarly journals Acoustic Emission Studies on Carbon/Phenolic Ablative Composites using PCD and PCBN Tools

1999 ◽  
Vol 8 (3) ◽  
pp. 096369359900800 ◽  
Author(s):  
P. S. Sreejith ◽  
R. Krishnamurthy
Keyword(s):  
Acoustic Emission ◽  
Condition Monitoring ◽  
Cutting Tool ◽  
Tool Condition Monitoring ◽  
Tool Condition ◽  
The Status ◽  
Emission Studies ◽  
Pcbn Tools ◽  
Cutting Speeds ◽  
Phenolic Composite

During manufacturing, the performance of a cutting tool is largely dependent on the conditions prevailing over the tool-work interface. This is mostly dependent on the status of the cutting tool and work material. Acoustic emission studies have been performed on carbon/phenolic composite using PCD and PCBN tools for tool condition monitoring. The studies have enabled to understand the tool behaviour at different cutting speeds.

scholarly journals Bi-Directional Power Flow in Switchgear with Static Transfer Switch Applied at Various Renewable Energies

Energies ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 3187
Author(s):  
Keon-Woo Park ◽  
Chul-Hwan Kim
Keyword(s):  
Communication System ◽  
Power Flow ◽  
Electronic Device ◽  
Test Sequence ◽  
Test Results ◽  
Distributed Generations ◽  
Prototype Development ◽  
Intelligent Electronic Device ◽  
Bidirectional Power Flow ◽  
Actual Test

In this study, we describe the development of a plug-in type of switchgear that can control bidirectional power flow. This switchgear system can connect distributed generations such as photovoltaic and wind turbine generation, and AC and DC loads. The proposed switchgear system consists of an inverter for connecting distributed generations and DC load, a static transfer switch (STS) that can control and interrupt the bidirectional power flow, and an intelligent electronic device (IED) that can control each facility using a communication system. Since the topology inside the switchgear is composed of DC bus, it can be operated as a plug-in type of system that can be used by simply connecting the converters of various distributed generations to the inverter in the developed switchgear system. In this study, we describe the overall structure of the proposed switchgear system and the operation of the components. In addition, prototypes of each facility are developed and the results of building a small testbed are presented. Finally, we verify the operation of the inverter by performing an experiment on the testbed and show that throughout a test sequence the proposed switchgear system works normally. The contributions of this study are the development of a plug-in type of switchgear for AC/DC and the actual test results presented through prototype development and testbed configuration.

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