2 edition of effects of transients on distance relay performance found in the catalog.
effects of transients on distance relay performance
J. K. Foo
|Statement||Jang Kae Foo ; supervised by P.A. Crossley.|
|Contributions||Crossley, P. A., Electrical Engineering and Electronics.|
Relay performance. Distance relay performance is defined in terms of reach accuracy and operating time. Reach accuracy is a comparison of the actual ohmic reach of the relay under practical conditions with the relay setting value in ohms. The effect of load flow is to cause a shift in this voltage relative to the relay current because the relay current (Ir) and the total fault cur rent (If) are out of phase with each other. The shift in phase in the voltage is more pronounced as the impedance, Zt, gets larger relative to the impedance, Size: KB.
Another important consideration is the effect of load on the performance of the distance elements. For this example, we added a source at the remote kV bus and a significant load angle (degree, not including phase shift through the trans-former) to simulate a heavy load flow, as shown in Fig. 4. Table 4 shows the distance element reach data. The CT behavior and its compatibility with relay protection 23 Fig. 4 Current immediately after fault inception. 3. The influence of CT saturation to the performance of the relay Distance relays In general, the reach of distance relays will be affected by CT saturation.
transient causes the Zone 1 element to pick up, then this CVT transient is not tolerable. One solution to the CVT -transient-induced distance element overreach problem for out-of-section. faults has been to reduce the Zone 1 element reach. However, the CVT transient response for. L. K. Hung, N. H. Viet, V. P. Huan, “The effect of fault resistance on the performance of distance relay protection”, The International Symposium on Electrical-Electronics Engineering, Ho Chi Minh City, Vietnam, pp. , November , Author: K. H. Le, P. H. Vu.
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Discuss relay performance during these failures. We analyze the performance of two different distance relays during a CCVT failure in which the voltage applied to the relays was erratic and influenced the frequency tracking in one relay but not the other.
Next, we discuss an event in which a CCVT transient led to a relay. distance relay in protecting the transmission lines under abnormal paper focuses on modelling and simulation of distance relay using MATLAB/SIMULINK this paper, distance relay is connected to a kV interconnected system with kv transmission line.
The simulation results illustrate the simple and effectiveFile Size: KB. Study of capacitive voltage transformer transient effects on the performance of distance relays Article May with 12 Reads How we measure 'reads'. fault loop, the voltage and current signals at relay point will be affected in both steady and transient state.
This impact will affect the performance of exiting protection methods, such as distance relay. This paper will analyze and explore the impact STATCOM employed in a transmission system on the Performance of distance Size: KB. We also verify the proposed model under a variety of fault types and fault locations.
Analytical study on the effects of STATCOM on distance relay performance is examined. Analytical and simulation results are used to discuss the impact on the performance of distance relay for different modes and different STATCOM locations on transmission by: 4.
The performance of the distance relay would be strongly affected by series compensation . The problems caused by series compensation for distance protection of transmission lines are discussed. Moreover, unbalanced loads and non-symmetrical lines can affect a distance relay performance.
In this paper we present a new algorithm to increase the accuracy and improve the efficiency of. the transient phenomenon so that relay perfor mance in the presences of the transients may be investigated.
However if the transi ent phenomenon and impact on the protection. A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. the proposed methodology. Adjustment of distance and differential relays were studied.
Relay performance under CT saturation and the effects of the removal of anti-aliasing analog filter were investigated. Local and remote backup distance protection ofFile Size: 5MB.
Abstract The distance relay is suffering from under-reach in its performance. This is because of some transient disturbance, which may happen when the power flows and swings. Besides that the power swings as a consequence of some fault cases.
In this paper a new distance relay has been suggested and modeled for detecting stable and unstable power : Atheer Habash Abosh, Abdul Ghani A. Abdul Ghafoor. An enhanced distance protection scheme is implemented to eliminates issues on distance relay for series compensated line. It is also simulated the auto-recloser schemes to discriminating between the temporary and permanent by: 1.
Improving the Transient Immunity Performance of Microcontroller-Based Applications, Rev. 0 2 Freescale Semiconductor The Challenge The Challenge As real-world electrical disturbances are understood and modeled, new standards are developed to characterize, monitor, and qualify the effects of these disturbances in applications.
These standardsFile Size: 1MB. Problems of Theoretical Analysis in the Practice, Utilisation and Planning of Relay Protection of High-Voltage Networks. Chapter I. Synthesis and Application of Sequence Networks for Unbalanced System Conditions Disturbance of the Normal Book Edition: 1.
the system especially the protection relay . Particularly the transients superimposed on power frequency voltage and current waveforms Compensator (STATCOM) on Performance of Distance Relay”. European trans. on Elect power, vol, pp, “Impact of STATCOM modeling on its Effect of on Distance Relay Tripping.
Abstract. As has been previously stated the most positive and reliable type of protection compares the current entering the circuit with the current leaving it; on transmission lines and feeders the length, voltage or arrangement of the line very often make this principle uneconomical so, in a distance relay, instead of comparing the local line current with the current at the far end of the.
The transient behavior of CVT is then investigated under different faults. Finally, the effects of CVT transients on distance relays performance is studied using extensive simulation.
Identifiers. purposes of accurately simulating the fault transients. The simulation results show the impact of UPFC on the performance of a distance protection relay for different fault conditions and for different fault location. Index Terms—Distance relay, flexible alternating current transmission (FACTS) controllers, power system protection, UPFC.
Distance Relay Response to Transformer Energization: Problems and Solutions Joe Mooney, P.E. and Satish Samineni, Schweitzer Engineering Laboratories Abstract— Modern distance relays use various filtering algo-rithms to extract the fundamental frequency component of power system voltage and current waveforms.
The relays then use the. with them which actually affects its accurate performance . RELAY PERFORMANCE: Distance relay performance is defined in terms of reach accuracy and operating time. Reach accuracy is a comparison of the actual ohmic reach of the relay under practical conditions with the relay setting value in ohms .
Reach accuracyAuthor: E Eneh Maxwell, E. C Okafor, Alor Michael Onyeamaechi, I Eneh Victor. Distance Relay Fundamentals 63 fault, operation does not occur because IZ-V and V are ° out of phase. Observe that for the balance point fault, the V is exactly equal to IZ.
This is true for the three-phase fault shown (also for a phase-to-phase fault) and for a phase distance function only. For a ground distance function, this will only be File Size: 1MB.the relay point will be affected in both the steady state and the transient state.
This in turn will affect the performance of existing protection schemes, such as the distance relay which is one of the very widely used methods in transmission line protection , .
Author Author: a.GERB: Dimensioning of current transformers for protection applications 4 GE Multilin tends to drastically reduce the effect of the remanent flux left in the core as a result of its lower magnetizing impedance and much lower secondary time constant.
The effect of the remanent flux is also to reduce the time to Size: KB.