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Distance Protection Design Using Digital Input Data
Wannous, Kinan Hasan Wafaa ; Müller,, Zdeněk (oponent) ; Braciník, Peter (oponent) ; Toman, Petr (vedoucí práce)
IEC 61850-9-2 specifies that the transmission of sampled measured values (SMVs)over an Ethernet network, using sampled values generated by merging units of IEDsor individual merging units, instrument transformers. The implementation of IEC 61850-9-2 depends on the dataset specifications such as time synchronization, sample counts, and interval time. The dissertation is focused on protection algorithms and analyses the impact of IEC61850-9-2LE on physical protections with (analog-digital) input data of voltage and current. With the increased interaction between physical devices and communication components, the test proposes a communication analysis for a substation with the conventional method (analog input) and digital method based on the IEC 61850standard. The thesis analyses the merging unit’s functions for relays using IEC61850-9-2LE. The proposed method defines the sampled measured values source and analysis of the traffic. Further, the thesis deals with the programming of protection function algorithms in Matlab. The model evaluated the harmonics impact on digital relays and the impact of current transformer saturation on distance protection. In the end, the thesis deals with the assessment of the benefits of IEC 61850-9-2LEusing a neural network. The last chapter focuses on a real-time application that subscribes the data stream coming from a substation near the protection laboratory in Brno University of Technology. IEC 61850-9-2 LE SMVs are used to transmit the traffic to a university lab-oratory with 16 km of fiber optic cable. The application built using Matlab and can read the traffic from the ethernet port, the traffic decoded and convert from ASCII to the decimal numbers then draw the current and voltage values. The application developed without using any need for additional hardware, the requirements are the ethernet port RJ45 from the station and pc that is running Matlab. The benefits and features of the application, easy to use, ability to implement all the distance protection functions, calculation of the RMS values of the voltage and current, harmonic distortion, the harmonic components with FTT analysis, distance protection characteristics and fault impedance calculation. All calculations implemented in real-time, moreover, in this chapter include sensitivity analysis of the Matlab model in previous chapters. Distance protection functions discussed in this thesis used the offline model of Matlab or captured with Comtrade format files
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Distance Protection Design Using Digital Input Data
Wannous, Kinan Hasan Wafaa ; Müller,, Zdeněk (oponent) ; Braciník, Peter (oponent) ; Toman, Petr (vedoucí práce)
IEC 61850-9-2 specifies that the transmission of sampled measured values (SMVs)over an Ethernet network, using sampled values generated by merging units of IEDsor individual merging units, instrument transformers. The implementation of IEC 61850-9-2 depends on the dataset specifications such as time synchronization, sample counts, and interval time. The dissertation is focused on protection algorithms and analyses the impact of IEC61850-9-2LE on physical protections with (analog-digital) input data of voltage and current. With the increased interaction between physical devices and communication components, the test proposes a communication analysis for a substation with the conventional method (analog input) and digital method based on the IEC 61850standard. The thesis analyses the merging unit’s functions for relays using IEC61850-9-2LE. The proposed method defines the sampled measured values source and analysis of the traffic. Further, the thesis deals with the programming of protection function algorithms in Matlab. The model evaluated the harmonics impact on digital relays and the impact of current transformer saturation on distance protection. In the end, the thesis deals with the assessment of the benefits of IEC 61850-9-2LEusing a neural network. The last chapter focuses on a real-time application that subscribes the data stream coming from a substation near the protection laboratory in Brno University of Technology. IEC 61850-9-2 LE SMVs are used to transmit the traffic to a university lab-oratory with 16 km of fiber optic cable. The application built using Matlab and can read the traffic from the ethernet port, the traffic decoded and convert from ASCII to the decimal numbers then draw the current and voltage values. The application developed without using any need for additional hardware, the requirements are the ethernet port RJ45 from the station and pc that is running Matlab. The benefits and features of the application, easy to use, ability to implement all the distance protection functions, calculation of the RMS values of the voltage and current, harmonic distortion, the harmonic components with FTT analysis, distance protection characteristics and fault impedance calculation. All calculations implemented in real-time, moreover, in this chapter include sensitivity analysis of the Matlab model in previous chapters. Distance protection functions discussed in this thesis used the offline model of Matlab or captured with Comtrade format files
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The development of the impedance measured by distance relay
Wannous, K.
This paper explains the possibility of implementation of a model of a quadrilateral characteristic type of distance relay with the zones using MATLAB/SIMULINK package. SimPowerSystem was used to present modeling of distance relay. The quadrilateral R-jX plain was created to show the trajectory of measured impedance using the distance relay. The relay identifies the fault locations as expected. The impedance path reflects to the power system model under fault conditions. The goal of this paper is to describe the building and designing distance relay characteristic using Simulink model, inside the modeling, impedance calculation, zone coordination were designed.
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