Abstract
As the number of consumers of electricity increases the electric power generated required to serve the consumers increases. Due to the long distance transmission of the generated power the power system becomes complex. That is why HVDC transmission system used for long distance carriage of power. During transmission of HVDC system protection and security of the system is compulsory in order to minimize the overall losses. This review paper discusses the protection of HVDC line based on transient energy and transient power. The fault which is occurred on the system reflected on three main parts of the system. Using modified traveling wave algorithm the transient parameters are determined and the type and location of fault can be detected. The simulation is done using PSCAD/EMTDC, MATLAB/Simulink. Motivation/Background: Due to the complication of a power system, HVDC power transmission system was chosen. But the system needs protection to secure the transportation of the needed amount of power. Method: In this review paper a modified travelling wave algorithm is used to detect the faults. Results: The result from the output of the algorithm shows the transient power and energy came to stability within short time. Conclusions: By detecting the transient power and energy, it can easily be protect the system from severe problem.
Highlights
The transmission lines act as very important elements in any power system as it is these components that carry electric power from the point of generation to the end user [1]
The actual data coming from electric power enterprises show that 50% faults happened in HVDC system belong to HVDC line faults [3]
Figure 12: simulation result of HVDC line on an internal fault. As it is shown from the above result of simulation of the designed sample of HVDC transmission line, the current, the voltage, the transient power and the transient energy are the result of the transmission line parameter
Summary
The transmission lines act as very important elements in any power system as it is these components that carry electric power from the point of generation to the end user [1]. The faulty section of the line needs to be detected and isolated as soon as possible to reduce the damage it would cause. This demands a fast and accurate fault detector and locator algorithm including the type of algorithm used in this review paper [2]. It is obvious that HVDC line carries huge amount of voltage. Due to this the HVDC line becomes complex and faces. This review paper points out the protection of the system based on the two transient parameters
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