|
|
Analysis of parallel operation of nodal areas of 110 kV Krasikov and Neznasov transformers stations
Kostkan, Petr ; Kopička, Marek (referee) ; Ptáček, Michal (advisor)
Currently, the nodal areas of Neznášov substation and Krasíkov substation, which belong to ČEZd distribution network 110 kV – East, are operand as separate units. In the defined setting, each nodal area comprises of two 400/110 kV transformers. In the case of failure of the transformer T401 or T402, the criterion N-1 for twenty percent of the rated output is not met. Such problem can be solved by parallel operation of nodal areas of Neznášov substation and Krasíkov substation. The principal as well as practical aim of this thesis is to interconnect the bridge operated connection in separated areas into parallel/loop operation of nodal areas (supplied by 400/110 kV transformers). Computing software is used to calculate the steady state and short-circuit conditions in the distribution network 110 kV for separate and parallel operation of mentioned nodal areas. Power flow analysis is aimed at assessment and evaluation of voltage conditions, transformers loading (400/110 kV and 110/vn) as well as 110 kV lines loading. Obtained short-circuit indices is used to examine short-circuit, withstand capability of the 110 kV substation. Finally, benefits as well as drawbacks of the separate and parallel operation are compared and evaluated. If necessary, the technical arrangements are proposed/designed in order to allow parallel operation of nodal areas Neznášov substation and Krasíkov substation.
|
|
|
Analysis of 110 kV distribution network in the Otrokovice nodal area
Vachutka, Ondřej ; Kučera, Michal (referee) ; Ptáček, Michal (advisor)
Master's thesis deals with analysis of distribution network 110 kV in south Moravia area. Therefore it makes basic description of the scope EG.D, a.s. company, current state of the 110 kV electricity network and their development. The practical part of the master's thesis is focused on the transmission capacity of the 110 kV wiring and the voltage monitoring in the substation during winter network load. Simulations were constructed for analysis of network load for the years 2020, 2025, 2030 and 2035. Steady state was calculated for the normal state as well as for the emergency state (N-1). The analysis was created to ensure 110 kV distribution network in the nodal area Otrokovice during the failure of the entire 400/110 kV Otrokovice transformation station for the years 2025, 2030 and the design of a new 400/110 kV substation.
|
|
|
The Analysis of the Possibility of Realization of a New Substation 400/110kV as a Substitute for TR Tábor
Modlitba, Petr ; Kozák, Miroslav (referee) ; Toman, Petr (advisor)
This thesis deals with the assessment of the location of the new transformer station 400/110 kV in terms of conditions in the 110 kV network, which will be supplied from this substation. The new 400/110 kV transformer station will replace the current transformer station 220/110 kV Tábor, which will be decommissioned in connection with the overall 220 kV system attenuation in the Czech power transmission system. On the basis of the load flow simulation of the 110 kV distribution network and calculations of the short-circuit conditions performed by simulation SW LUG two variants of the location of a new 400/110 kV transformer station were assessed. The 110 kV network calculations were focused on the evaluation of voltage conditions, the 110 kV lines loading in the standard operating scheme and in failure states according to the N-1 criterion, short-circuit conditions and losses. On the basis of the computational analyses, the technical measures necessary to ensure the reliable operation of the 110 kV network in the given area are designed and economically evaluated.
|
|
|
Steady state and short-circuit conditions in 110kV E.ON network fed from Čebín transformer station
Krutiš, Petr ; Janda, Petr (referee) ; Blažek, Vladimír (advisor)
Master’s thesis deals with computation of steady state and short-circuit conditions in 110 kV nodal area of Čebín. The first part of thesis is theoretical. There is described computation of steady state and short-circuit conditions. There is description of 110 kV nodal area of Čebín too. There are made computations in the practical part. Two types of operation of transformers T401 and T402 are evaluated. The transformers operate independent at first, then they are connected in parallel. Voltage conditions in substations, load of lines and transformers, power losses and short-circuit resistance of substations in 110 kV nodal area of Čebín are evaluated based on the computations. There are compared the both types of operation of transformers in the end of practical part.
|
|
| |
|
|
Analysis of 110 kV distribution network in the Otrokovice nodal area
Vachutka, Ondřej ; Kučera, Michal (referee) ; Ptáček, Michal (advisor)
Master's thesis deals with analysis of distribution network 110 kV in south Moravia area. Therefore it makes basic description of the scope EG.D, a.s. company, current state of the 110 kV electricity network and their development. The practical part of the master's thesis is focused on the transmission capacity of the 110 kV wiring and the voltage monitoring in the substation during winter network load. Simulations were constructed for analysis of network load for the years 2020, 2025, 2030 and 2035. Steady state was calculated for the normal state as well as for the emergency state (N-1). The analysis was created to ensure 110 kV distribution network in the nodal area Otrokovice during the failure of the entire 400/110 kV Otrokovice transformation station for the years 2025, 2030 and the design of a new 400/110 kV substation.
|
|
|
Analysis of parallel operation of nodal areas of 110 kV Krasikov and Neznasov transformers stations
Kostkan, Petr ; Kopička, Marek (referee) ; Ptáček, Michal (advisor)
Currently, the nodal areas of Neznášov substation and Krasíkov substation, which belong to ČEZd distribution network 110 kV – East, are operand as separate units. In the defined setting, each nodal area comprises of two 400/110 kV transformers. In the case of failure of the transformer T401 or T402, the criterion N-1 for twenty percent of the rated output is not met. Such problem can be solved by parallel operation of nodal areas of Neznášov substation and Krasíkov substation. The principal as well as practical aim of this thesis is to interconnect the bridge operated connection in separated areas into parallel/loop operation of nodal areas (supplied by 400/110 kV transformers). Computing software is used to calculate the steady state and short-circuit conditions in the distribution network 110 kV for separate and parallel operation of mentioned nodal areas. Power flow analysis is aimed at assessment and evaluation of voltage conditions, transformers loading (400/110 kV and 110/vn) as well as 110 kV lines loading. Obtained short-circuit indices is used to examine short-circuit, withstand capability of the 110 kV substation. Finally, benefits as well as drawbacks of the separate and parallel operation are compared and evaluated. If necessary, the technical arrangements are proposed/designed in order to allow parallel operation of nodal areas Neznášov substation and Krasíkov substation.
|
|
|
The Analysis of the Possibility of Realization of a New Substation 400/110kV as a Substitute for TR Tábor
Modlitba, Petr ; Kozák, Miroslav (referee) ; Toman, Petr (advisor)
This thesis deals with the assessment of the location of the new transformer station 400/110 kV in terms of conditions in the 110 kV network, which will be supplied from this substation. The new 400/110 kV transformer station will replace the current transformer station 220/110 kV Tábor, which will be decommissioned in connection with the overall 220 kV system attenuation in the Czech power transmission system. On the basis of the load flow simulation of the 110 kV distribution network and calculations of the short-circuit conditions performed by simulation SW LUG two variants of the location of a new 400/110 kV transformer station were assessed. The 110 kV network calculations were focused on the evaluation of voltage conditions, the 110 kV lines loading in the standard operating scheme and in failure states according to the N-1 criterion, short-circuit conditions and losses. On the basis of the computational analyses, the technical measures necessary to ensure the reliable operation of the 110 kV network in the given area are designed and economically evaluated.
|
|
|
Steady state and short-circuit conditions in 110kV E.ON network fed from Čebín transformer station
Krutiš, Petr ; Janda, Petr (referee) ; Blažek, Vladimír (advisor)
Master’s thesis deals with computation of steady state and short-circuit conditions in 110 kV nodal area of Čebín. The first part of thesis is theoretical. There is described computation of steady state and short-circuit conditions. There is description of 110 kV nodal area of Čebín too. There are made computations in the practical part. Two types of operation of transformers T401 and T402 are evaluated. The transformers operate independent at first, then they are connected in parallel. Voltage conditions in substations, load of lines and transformers, power losses and short-circuit resistance of substations in 110 kV nodal area of Čebín are evaluated based on the computations. There are compared the both types of operation of transformers in the end of practical part.
|
|
| |
guest ::
