Project of structural solutions and components of special processor of relay protection in high-voltage lines of electricity transmission

2017 ◽  
Author(s):  
Oleh Liura ◽  
Igor Sabadash ◽  
Nataliia Vozna ◽  
Ivan Ostrovka
Keyword(s):  
High Voltage ◽  
Relay Protection ◽  
Electricity Transmission ◽  
Special Processor ◽  
Structural Solutions

scholarly journals RESEARCH OF TRANSIENT PROCESSES IN HIGH-VOLTAGE TRANSMISSION LINES 6–10 KV AND DEVELOPMENT OF MICROELECTRONIC SPECIAL PROCESSOR OF RELAY PROTECTION, INVARIANT TO CHANGE IN AMPLITUDES OF PHASE CURRENTS

2018 ◽  
pp. 57-83
Author(s):  
О. P. Liura ◽  
N. Ya. Vozna ◽  
Ya. M. Nykolaichuk
Keyword(s):  
Information Technology ◽  
High Voltage ◽  
Transmission Lines ◽  
Relay Protection ◽  
Electricity Transmission ◽  
Short Circuits ◽  
Special Processor ◽  
The Given ◽  
Structural Solutions ◽  
Fast Acting

The fast-acting algorithms of exposure and invariant authentication of transients in the lines of electricity transmission as load surge, short circuits and start of powerful electric engines were developed; based on that, the functions of relay defense device of high-voltage lines of electricity transmission were determined. The given structure of small, microelectronic fast-acting device of relay defense is with the extended functional possibilities of recognition of load surge and defense of high-voltage lines of electricity transmission from short circuits, the syntax of his functions was presented. This device can be used for load surge recognition and short circuits, invariant to the size of increase currents in the separate phases of electric lines. It allowed successful application of the developed method and device for simultaneous recognition of load surge, short circuits and starting of powerful electric engines. The information technology of designing structural solutions of relay protection special processor for high-voltage electricity transmission lines was presented.

scholarly journals Peculiarities of the relays intended for operating trip coils of the high-voltage circuit breakers

2007 ◽  
Vol 4 (2) ◽  
pp. 223-237 ◽  
Author(s):  
Vladimir Gurevich
Keyword(s):  
High Voltage ◽  
Relay Protection ◽  
International Standards ◽  
Circuit Breakers ◽  
Technical Parameters ◽  
Technical Specifications ◽  
Electromagnetic Relays ◽  
Microprocessor Protection

Parameters of the subminiature electromagnetic relays used as output elements in microprocessor relay protection, do not correspond to technical specifications on these relay protection. The reasons of this discrepancy are analyzed. Contradictions and discrepancies of the international standards in this area are considered. It is shown, that absence of clearness in standards and mistakes in technical specifications of manufacturers of microprocessor protection do not allow estimating correctly technical parameters and lead to decrease in reliability of relay protection.

Relay Protection Security Analysis of Jiuan Substation under Complex Power Transmission Environment

2013 ◽  
Vol 385-386 ◽  
pp. 1021-1024
Author(s):  
Lei Dong ◽  
Wei Di Li ◽  
Wen Ping Zhou ◽  
Tian Jiao Pu
Keyword(s):  
High Voltage ◽  
Power Supply ◽  
Power Transmission ◽  
Security Analysis ◽  
Relay Protection ◽  
System Software ◽  
Operating Environment ◽  
Complex Power ◽  
Simulation Results ◽  
Supply Environment

As the voltage class and transmission capacity of power grid is increasing, the operating environment of JiuAn substation, which is one of the power supply sources of Ultra-High Voltage (UHV) transmission line, becomes more complex. A model of JiuAn substation and its complicated power supply environment is built using the power system software PSCAD/EMTDC, the parameters under typical kinds of fault are simulated, and MATLAB software is used to acquire relay protection feature from the simulation results. Based on the work above, relay protection security of JiuAn Substation under complex power transmission environment is analyzed, which will provide guidance for the substation operation.

Research on Microcomputer Relay Protection Anti-Interference of 500kV Transmission Line in MATLAB

2011 ◽  
Vol 204-210 ◽  
pp. 1346-1350
Author(s):  
Wei Kang ◽  
Xing Chen ◽  
Jian Ting Gui ◽  
He Zhang ◽  
Li Xia Zhang
Keyword(s):  
Transmission Line ◽  
Test Data ◽  
High Voltage ◽  
Relay Protection ◽  
Load Transmission ◽  
Microcomputer Relay Protection ◽  
Microcomputer Protection

This paper established a 500kV microcomputer protection model with EFT/B generator. The generator was built based on the mechanism of arc forming and distinguishing when cutting off the no-load transmission line. The according parameters were set by the arc estimating formula and test data. The simulations shows that the traditional disincentive measure is limited for high voltage line and the arithmetic is still sensitive to the disturbance and made the relay set false operation. A comprehensive measure is put forward and tested by the microcomputer protection arithmetic.

RTDS Environment Development of Ultra-High-Voltage Power System and Relay Protection Test

2008 ◽  
Vol 23 (2) ◽  
pp. 618-623 ◽  
Author(s):  
Bin Wang ◽  
Xinzhou Dong ◽  
Zhiqian Bo ◽  
A. Perks
Keyword(s):  
Power System ◽  
High Voltage ◽  
Relay Protection ◽  
Ultra High Voltage

First Superconducting Fault Current Limiter in Russian Power Grid

2021 ◽  
Vol 4 (4) ◽  
pp. 4-16
Author(s):  
Michael E. MOZAH ◽  
◽  
Sergey V. SAMOYLENKOV ◽  
Andrey P. VAVILOV ◽  
Evgeny P. PROKHOROV ◽  
...  
Keyword(s):  
Power System ◽  
High Voltage ◽  
Short Circuit ◽  
Relay Protection ◽  
Short Circuit Current ◽  
Fault Current ◽  
Fault Current Limiter ◽  
Superconducting Fault Current Limiter ◽  
Current Limiter ◽  
Technical Solutions

Superconducting fault current limiter (SFCL) is an innovative method for reducing the level of short-circuit currents in high-voltage electrical networks. This reduces the number of points of separation of the electrical network in conditions of short-circuit current limitation and thereby increases the network capacity and reliability of power supply to consumers. At the same time, the development of such devices poses new challenges for power engineers related to the integration of this equipment into the existing power system. The article discusses the process of implementation and pilot operation of the SFCT 220 kV pilot project (produced by CJSC “SuperOx”) at the 220/20 kV “Mnevniki” high-voltage substation in Moscow. The project required an extensive set of scientific studies and tests to confirm the characteristics of new devices and the possibility of their use in Russian power systems, the use of digital modeling technologies to test the operability of relay protection devices, as well as the development of new methodological documents for calculating the short-circuit current and relay protection parameters. As a result of the work, SFCT was switched on at the 220/20 kV “Mnevniki” substation at the end of 2019. The subsequent operation of the SFCT in 2019-2020 fully confirmed the declared characteristics of the device and the correctness of the selected technical solutions. The article is devoted to the features of the process of integrating a new device into the existing power system, the main technical solutions, the results of testing and operation of the device, as well as possible prospects for the development of SFCT technology.

Sign in / Sign up

Export Citation Format

Share Document