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Design of instrument transformers for digital protection relays
Souček, Jan ; Matuška, Marcel (referee) ; Toman, Petr (advisor)
Master’s thesis is concerned with instrument transformers, which are used in conjunction with numerical protection relays. Therefore mainly with protective transformers of class P and transformers dimensioned for transient effects, which are important e.g. for fast differential or distance protections. The introduction includes fundamental notions, quantities and equations, which refers to instrumental current and voltage transformers. Below are mentioned connection diagrams of these transformers applied to specific electrical network types and faults, of which identification is required. These diagrams and faults are supplied with math equations and eventually with phasor diagrams. Noted informations corresponds to the present standards. Task of the next part is to compile requirements for dimensioning of current transformers, which imposes digital protections from ABB, AREVA and Siemens companies. These requirements, which mostly defines the minimal accuracy limit factor or the knee-point voltage of current transformer, are specified for individual protection terminals, eventually for specific protective functions. Part of the thesis is computer program developed as macro in the Microsoft Office Excel program via Visual Basic for Applications programming language. Program uses equations noted in this work and it can be used for quick dimensioning of current transformers for protective terminals from manufactures mentioned above.
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Dimensioning of Earthing System in HV Switchgear
Buršík, Roman ; Matuška, Marcel (referee) ; Orságová, Jaroslava (advisor)
My master's thesis is focused on grounding of HV switchgear. The aim of this work is to create a computer program intended for dimensioning of earthing networks. The earthing networks are the most convenient alternative in term of effective grounding and distribution of ponential. They are based on latiny a flat conductor network cables and connection of appliance parts to network. Introduction of the thesis is dedicated to explanation of grounding theory and to description of requirements essential for properly designed earthing system (dimensioning of earthing system). Following chapter brings description of computer program algorithm testing propriety of an assigned earthing network for a particular switchgear. The chapter also contains description of an user interface and explanation of all features, included in the program. Last part provides presentation of program utilization to particular numerical assignment.
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Intelligent softwares for protection and control systems schemes design
Kiš Bandi, Peter ; Matuška, Marcel (referee) ; Orságová, Jaroslava (advisor)
The master’s thesis is aimed at creation of project documentation used in power engineering, specifically the creation of schemes in the field of secondary technology. It deals with the basics of marking used by distribution system operators in the Czech Republic, the levels of documentation necessary for the construction or reconstruction of the electrical equipment itself. The aim of this master’s thesis is to design the switchboard with two design solutions using two different types of software. Used software will be Autocad LT as a representative of the CAD system and Ruplan EVU as CAE software. Based on the experience gained in designing and pre-defined aspects, at the end of thesis determine software that is more suited to designing.
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Protection of combined HV lines
Jedlička, Dominik ; Matuška, Marcel (referee) ; Orságová, Jaroslava (advisor)
The thesis deals with the issue of protection of combined underground cables and overhead lines in effectively grounded networks. It compares the issue of protecting overhead and cable lines and the implementation of autoreclosing. The last part deals with protection settings on a specific combined line.
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Intelligent softwares for protection and control systems schemes design
Kiš Bandi, Peter ; Matuška, Marcel (referee) ; Orságová, Jaroslava (advisor)
The master’s thesis is aimed at creation of project documentation used in power engineering, specifically the creation of schemes in the field of secondary technology. It deals with the basics of marking used by distribution system operators in the Czech Republic, the levels of documentation necessary for the construction or reconstruction of the electrical equipment itself. The aim of this master’s thesis is to design the switchboard with two design solutions using two different types of software. Used software will be Autocad LT as a representative of the CAD system and Ruplan EVU as CAE software. Based on the experience gained in designing and pre-defined aspects, at the end of thesis determine software that is more suited to designing.
|
|
|
Design of instrument transformers for digital protection relays
Souček, Jan ; Matuška, Marcel (referee) ; Toman, Petr (advisor)
Master’s thesis is concerned with instrument transformers, which are used in conjunction with numerical protection relays. Therefore mainly with protective transformers of class P and transformers dimensioned for transient effects, which are important e.g. for fast differential or distance protections. The introduction includes fundamental notions, quantities and equations, which refers to instrumental current and voltage transformers. Below are mentioned connection diagrams of these transformers applied to specific electrical network types and faults, of which identification is required. These diagrams and faults are supplied with math equations and eventually with phasor diagrams. Noted informations corresponds to the present standards. Task of the next part is to compile requirements for dimensioning of current transformers, which imposes digital protections from ABB, AREVA and Siemens companies. These requirements, which mostly defines the minimal accuracy limit factor or the knee-point voltage of current transformer, are specified for individual protection terminals, eventually for specific protective functions. Part of the thesis is computer program developed as macro in the Microsoft Office Excel program via Visual Basic for Applications programming language. Program uses equations noted in this work and it can be used for quick dimensioning of current transformers for protective terminals from manufactures mentioned above.
|
|
|
Dimensioning of Earthing System in HV Switchgear
Buršík, Roman ; Matuška, Marcel (referee) ; Orságová, Jaroslava (advisor)
My master's thesis is focused on grounding of HV switchgear. The aim of this work is to create a computer program intended for dimensioning of earthing networks. The earthing networks are the most convenient alternative in term of effective grounding and distribution of ponential. They are based on latiny a flat conductor network cables and connection of appliance parts to network. Introduction of the thesis is dedicated to explanation of grounding theory and to description of requirements essential for properly designed earthing system (dimensioning of earthing system). Following chapter brings description of computer program algorithm testing propriety of an assigned earthing network for a particular switchgear. The chapter also contains description of an user interface and explanation of all features, included in the program. Last part provides presentation of program utilization to particular numerical assignment.
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