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Testing of Distance Protection
Řehoř, Jiří ; Topolánek, David (referee) ; Orságová, Jaroslava (advisor)
The testing of distance protection in bachelor´s task is made a distinction between protection, requirements and relegation. This testing is also consisted in principle of function, describing terms of distance protection and comparing with time-current characteristics. The next step after short estimation was describing digital distance protection SIPROTEC 7SA511. The advantages are included in this estimation. The next part contains some configurations and connections with a test equipment in order to take control of measuring through the computer. The extended configurations are also comprised of two programms – DIGSY and TZO3. We had to make a suggestion of suitable methodics for measuring a time-current characteristic. We carried out three measurements where the test equipment was set to role of type TREND. A magnitude is generated at the output that is changed linearly in time with required rate (speed). We changed a current IX1 for our measurements that was undertaken with a rate of current rise. This process was given by a test equipment when the set values were constant. In the second measurement we modified a size of shift phase in the test equipment. In the third measurement we tried to set up different sizes of particular impedance characteristics (zone) inside of the distance protection where was set a neutral breaking time for the measured zone. On the contrary, the previous measurements had an absolute time.We have introduced evaluated results of measuring and observations in the end of this bachelor’s thesis.
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Testing of Distance Protection
Holub, Martin ; Vaculík, Petr (referee) ; Orságová, Jaroslava (advisor)
Bachelor thesis Testing of Distance Protection introduces us to the issue of distance protection and its detailed principle. It deals with its individual elements and shows us different types of impedance characteristics of measuring elements. It describes a situation that occurs during a short circuit on a homogeneous line, then introduces us to a DC component compensation and discuss the effect of distance protection degrees. Among other things, it deals with the digital distance protections and settings of their characteristics. Finally the theoretical part evaluates advantages over other protections and advantages and disadvantages of distance protections themselves. Thesis will introduce the digital distance protection REL 511 from the company ABB and characterizes its settings, parameters and connection to the testing equipment OMICRON CMC 256plus, which is used to control the protection via personal computer. Description of the programs OMICRON Test Universe and CAP 540 and their settings follows. This section can serve as a manual for future operators of REL 511 protection. The work provides a suitable methodology for measuring the operating characteristics and uses this method in practice. Given the limited version of the OMICRON Test Universe, polygonal tripping characteristics are measured in the module "Distance" with the shot test. Evaluation of measurements is summarized at the end.
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Calculation of distance protection relay setting for 110kV line.
Bartoš, Petr ; Vaculík, Petr (referee) ; Toman, Petr (advisor)
This work deals with both the calculation of short circuit conditions of 110 kV network in the Czech Republic. This network is divided into two parts, each of which feeds a 400/110 kV substation and the calculation is performed for different locations of a short circuit. The second part deals with the calculation of distance protection settings for one part of this network. The result of this work are the values of network parameters needed to set up distance protection, which protects our individual lines of the network.
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Project of Communication for Distance Protections 7SA 610 Protecting a Transmission Line
Bartko, Jan ; Topolánek, David (referee) ; Orságová, Jaroslava (advisor)
This work describes the structure and function of the distance protection relay Siemens 7SA610 SIPROTEC and presents the basic theoretical knowledge of the communication standard IEC 61850 at the beginning. It focuses on the configuration of the topology of two 7SA610 distance protection relays, PC and secondary relay test set Omicron CMC256 +. These two distance protection relays were programmed by using software implement DIGSI to transmit and receive GOOSE messages. It served to testing this created network by simple function. Computer and tester simulated the control system and commanded auto-reclosure to the first distance protection. Instruction was processed and also sended to the second distance protection. The final objective was to measure the tranfer time of GOOSE message between two distance protection relays. There was used a secondary tester. This measurement was implemented the tester Omicron CMC 256 +, which involves extending the NET-1 and so is compatible with the standard IEC 61850. The results and further actions are summarized in conclusion.
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The calculation of 110 kV network distance protection relays setings.
Bartoš, Petr ; Vaculík, Petr (referee) ; Toman, Petr (advisor)
This master’s thesis is about setting of distance protections. The first part is focused on a brief analysis of the basic types of failures and distance protections tripping characteristics and their co-operation with automatic re-turn. The most extensive theoretical chapter is devoted to specific influences that negatively affect the proper operation of distance protections. The practical part is about calculation of symmetrical short-circuit and dissymmetrical short-circuit conditions with consideration of fault resistance and the actual calculation settings of distance protections. Calculations of short-circuit conditions and setting of distance protections are made on a specific part of the network of E.ON in area Prostejov, which is supplied from the substation 400/110 kV Otrokovice.
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The calculation of the distance protection relay setings for HV line
Doležal, Marek ; Vaculík, Petr (referee) ; Toman, Petr (advisor)
I divided this work into two parts: theoretical and practical. The first part deals with theoretical calculation of setting for distance protection of high voltage line, possible defective states, which can appear on this network, and methods of calculating these defective states. The second part deals with application of the earlier described theory to calculation of distance protection for specified part of the network. The results of this work are all the parameters needed for setting of distance protection for one part of the network.
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Calculation of voltages and currents in the point of protection during faults
Tomášek, Lukáš ; Topolánek, David (referee) ; Haluzík, Evžen (advisor)
This work consists of two major parts - theoretical and practical. The theoretical part describes the course of short-circuit current in time, its components, characteristic values, and various types of short-circuits that may occur in electrification network. The theoretical part also describes the method of symmetrical components, its principles, fundamental relations and its use for handling the short-circuit current in electrification network, especially the asymmetrical short-circuits. The last theoretical section following the method of symmetrical components shows a summary of formulas used to calculate substitute short-circuit impedances in various elements of electrification network. The practical part then tries to answer how to handle short-circuit currents in a given network using the method of symmetrical components. Calculation is made for each type of short-circuit that may occur in the network, and voltage and current ratios are given for the point of short-circuit as well as for the point of a distance protection; main evaluated parameter of calculation is a short-circuit impedance measured by the distance protection. The conclusion of the practical part specifies why a compensation of distance protection is needed in ground short-circuits.
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Distance Protection for Parallel and Double-Circuit HV Lines
Muhayimana, Obed ; Wannous, Kinan Hasan Wafaa (referee) ; Orságová, Jaroslava (advisor)
Chránění paralelních a souběžných vedení je skutečně problematické z důvodů účinku vzájemné indukčnosti vedení v souběhu, odporu poruchy nebo rozložení zpětného proudu poruchy, které zkreslují impedanci jednofázové poruchy „viděné“ distanční ochranou. Proto současné numerické distanční ochrany nabízí kompenzační funkce, které je možno použít pro korekci charakteristik a výpočtu vzdálenosti poruchy pomocí lokátorů její charakteristice s dostatečnou odporovou rezervou a možnosti nastavení odpovídajícího režimu vypnutí. Tato práce se zabývá problémy, kterým čelí lokátor distanční ochrany při měření a výpočtu vzdálenosti místa jednofázové poruchy, a také mapuje současný stav řešení těchto problémů. Na základě výpočtu parametrů zadaného vedení bylo provedeno zhodnocení možných chyb při lokalizaci jednofázové poruchy a navrženo nastavení distanční ochrany určené k jeho chránění včetně nastavení parametrů určených pro kompenzaci výše uvedených negativních jevů. Bylo zjištěno, že zemnící lana a transpozice vedení přispívají k přesnosti lokátorů, protože nejmenší chyba byla zjištěna v transponovaném vedení se zemním lanem.
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Calculation of voltages and currents in the point of protection during faults
Tomášek, Lukáš ; Topolánek, David (referee) ; Haluzík, Evžen (advisor)
This work consists of two major parts - theoretical and practical. The theoretical part describes the course of short-circuit current in time, its components, characteristic values, and various types of short-circuits that may occur in electrification network. The theoretical part also describes the method of symmetrical components, its principles, fundamental relations and its use for handling the short-circuit current in electrification network, especially the asymmetrical short-circuits. The last theoretical section following the method of symmetrical components shows a summary of formulas used to calculate substitute short-circuit impedances in various elements of electrification network. The practical part then tries to answer how to handle short-circuit currents in a given network using the method of symmetrical components. Calculation is made for each type of short-circuit that may occur in the network, and voltage and current ratios are given for the point of short-circuit as well as for the point of a distance protection; main evaluated parameter of calculation is a short-circuit impedance measured by the distance protection. The conclusion of the practical part specifies why a compensation of distance protection is needed in ground short-circuits.
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Calculation of voltages and currents in the point of protection during faults
Tomášek, Lukáš ; Topolánek, David (referee) ; Haluzík, Evžen (advisor)
This work consists of two major parts - theoretical and practical. The theoretical part describes the course of short-circuit current in time, its components, characteristic values, and various types of short-circuits that may occur in electrification network. The theoretical part also describes the method of symmetrical components, its principles, fundamental relations and its use for handling the short-circuit current in electrification network, especially the asymmetrical short-circuits. The last theoretical section following the method of symmetrical components shows a summary of formulas used to calculate substitute short-circuit impedances in various elements of electrification network. The practical part then tries to answer how to handle short-circuit currents in a given network using the method of symmetrical components. Calculation is made for each type of short-circuit that may occur in the network, and voltage and current ratios are given for the point of short-circuit as well as for the point of a distance protection; main evaluated parameter of calculation is a short-circuit impedance measured by the distance protection. The conclusion of the practical part specifies why a compensation of distance protection is needed in ground short-circuits.
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