Distance Relaying with Power Swing Detection based on Voltage and Reactive Power Sensitivity

2016 ◽  
Vol 17 (1) ◽  
pp. 27-38 ◽  
Author(s):  
Ujjaval J. Patel ◽  
Nilesh G. Chothani ◽  
Praghnesh J. Bhatt
Keyword(s):  
Reactive Power ◽  
Synchronous Generator ◽  
Power Input ◽  
Parallel Line ◽  
Rate Of Change ◽  
Electrical Network ◽  
Distance Relay ◽  
Heavy Load ◽  
Power Swing ◽  
Distance Relaying

Abstract Sudden changes in loading or configuration of an electrical network causes power swing which may result in an unwanted tripping of the distance relay. Hence, it becomes utmost necessary to rapidly and reliably discriminate between actual fault and power swing conditions in order to prevent instability in power network due to mal operation of distance relay. This paper proposes a novel method for the discrimination between fault and power swing based on rate of change of voltage and reactive power measured at relay location. The effectiveness of the proposed algorithm is evaluated by simulating series of power swing conditions in PSCAD/EMTDC® software for different disturbances such as change in mechanical power input to synchronous generator, tripping of parallel line due to fault and sudden application of heavy load. It is revealed that the distance relay gives successful tripping in case of different fault conditions and remains inoperative for power swing with the implementation of the proposed algorithm. Moreover, the proposed scheme has ability to distinguish the symmetrical and asymmetrical fault occurrence during power swing condition.

Islanding Detection of Synchronous Generator-Based DGs using Rate of Change of Reactive Power

2019 ◽  
Vol 13 (4) ◽  
pp. 4344-4354 ◽  
Author(s):  
Srete Nikolovski ◽  
Hamid Reza Baghaee ◽  
Dragan Mlakic
Keyword(s):  
Reactive Power ◽  
Synchronous Generator ◽  
Rate Of Change ◽  
Islanding Detection

Distributed Virtual Synchronous Generator approach versus Singular Virtual Synchronous Generator approach: A dynamic stability evaluation

2020 ◽  
pp. 0309524X2097546
Author(s):  
Abdul Waheed Kumar ◽  
Mairaj ud din Mufti ◽  
Mubashar Yaqoob Zargar
Keyword(s):  
Power System ◽  
Transient Stability ◽  
Reactive Power ◽  
Magnetic Energy ◽  
Dynamic Performance ◽  
Synchronous Generator ◽  
Rate Of Change ◽  
Clearing Time ◽  
Magnetic Energy Storage ◽  
Virtual Synchronous Generator

This paper reports the modeling and dynamic performance of a wind penetrated multi-area power system incorporating a Singular Virtual Synchronous Generator (SVSG)/Distributed Virtual Synchronous Generator (DVSG). The active and reactive power controls are achieved by using Superconducting Magnetic Energy Storage (SMES) as Virtual Synchronous Generator (VSG). SMES based VSG control parameters are tuned offline using genetic algorithm (GA). Two topologies of VSGs are considered in this paper: SVSG at lowest inertia generator bus (SVSGGENBUS), SVSG at load bus (SVSGLOADBUS) and DVSG of comparatively smaller rating at three lowest inertia generator buses. A modified 18 machine, 70-bus power system is simulated in MATLAB/Simulink environment. System performance is assessed for two different types of disturbances: step wind disturbance and three-phase fault. The simulation results show that rate of change of frequency (ROCOF), deviations in frequency and voltage are minimized with DVSG. Transient stability measured in terms of critical clearing time (CCT) verifies that CCT is increased by DVSG topology.

Preventing third zone maloperation during power system stressed conditions

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Kasimala Venkatanagaraju ◽  
Monalisa Biswal
Keyword(s):  
New England ◽  
Average Rate ◽  
Test System ◽  
Rate Of Change ◽  
Distance Relay ◽  
Power Cycle ◽  
Power Swing ◽  
Protective Relay ◽  
Three Phase ◽  
Nuisance Tripping

Abstract The back-up third zone unit of distance relay may issue nuisance tripping command during different system critical events like power swing, voltage stress/instability and load encroachment. Since, such events are system symmetry phenomenon, the protection unit will not always able to discern them from three phase (symmetrical) fault in the distance relay third-zone region. The conventional relay algorithm fails to make a proper decision and results in unwanted tripping. This may further lead to system blackout. To mitigate this problem, a new approach based on the average rate of change of current (ARCC) is proposed. The method will work in integration with the conventional distance relay impedance setting algorithm to provide better results. The main advantage of the method is that it considers only local end current information. Within one power cycle, an accurate decision can be taken by the protective relay. The proposed method is validated considering IEEE 39-bus New England test system and the Indian regional power grid model modeled using EMTDC/PSCAD software. The simulation results for various critical cases and comparative analysis with existing methods shows effectiveness of the proposed method.

Loss Of Excitation (LOE) Protection of Synchronous Generator

2017 ◽  
Vol 8 (1) ◽  
pp. 230 ◽  
Author(s):  
Hui Hwang Goh ◽  
Sy yi Sim ◽  
Mohd. Nasri Abd Samat ◽  
Ahmad Mahmoud Mohamed ◽  
Chin Wan Ling ◽  
...  
Keyword(s):  
Reactive Power ◽  
Harmful Effect ◽  
Synchronous Generator ◽  
Synchronous Generators ◽  
Financial Cost ◽  
New Techniques ◽  
Power Generator ◽  
Grid Systems ◽  
Protection Scheme ◽  
Power Swing

<p>Synchronous generators require certain protection against loss of excitation because it can lead to harmful effect to a generator and main grid. Systems of powers are evolving with applications of new techniques to increase reliability and security, at the meantime techniques upgradation is being existed to save financial cost of a different component of power system, which affect protection ways this report discuss the way of loss of excitation protection scheme for an increase in a synchronous generator. It is obvious that when direct axis synchronous reactance has a high value, the coordination among loss of excitation protection and excitation control is not effective. This lead to restricting absorption capability of the reactive power generator. This report also reviews the suitable philosophy for setting the limiters of excitation and discusses its effect on loss of excitation protection and system performance. A protection scheme is developed to allow for utilization of machine capability and power swing blocking is developed to increase the reliability when power swing is stable.</p><p><em> </em></p>

Distance Relaying with Power Swing Detection based on Voltage and Reactive Power Sensitivity

ENERGYO ◽  
2018 ◽  
Author(s):  
Ujjaval J. Patel ◽  
Nilesh G. Chothani ◽  
Praghnesh J. Bhatt
Keyword(s):  
Reactive Power ◽  
Power Swing ◽  
Distance Relaying

A New Blocking Scheme for Distance Protection during Power Swings

2010 ◽  
Vol 11 (1) ◽  
Author(s):  
Ahmad Farid Abidin ◽  
Azah Mohamed ◽  
Hussain Shareef
Keyword(s):  
Fast Algorithm ◽  
Reactive Power ◽  
Test System ◽  
Software Test ◽  
Test Results ◽  
Distance Protection ◽  
Distance Relay ◽  
Additional Criterion ◽  
Power Swing ◽  
Power Swings

This paper presents a new and fast algorithm to prevent distance relay mal-operation during power swings. The algorithm blocks the relay tripping signals during power swing and unblocks the signals if a fault occurs during power swing. The proposed blocking scheme for distance protection incorporates an additional criterion into the conventional relay which is based on the derivative of the line reactive power as seen by the relay. This technique overcomes the shortcoming of conventional power swing detector (PSD) by removing the pre-defined R-X diagram. The conventional PSD has the difficulty in obtaining the timer setting at pre-defined R-X diagram due to varying cycle of power swings. To illustrate the effectiveness of the proposed algorithm, simulations were carried out on the IEEE 39 bus test system using the PSS/E software. Test results show the effectiveness of the proposed scheme in blocking the relay’s false trip signals during power swing.

Experimental verification of multi-input PSS with reactive power input for damping low frequency power swing

1999 ◽  
Vol 14 (4) ◽  
pp. 1124-1130 ◽  
Author(s):  
Y. Kitauchi ◽  
H. Taniguchi ◽  
T. Shirasaki ◽  
Y. Ichikawa ◽  
M. Amano ◽  
...  
Keyword(s):  
Experimental Verification ◽  
Reactive Power ◽  
Low Frequency ◽  
Power Input ◽  
Power Swing ◽  
Low Frequency Power ◽  
Frequency Power

Design and implementation of FLC system for fault ride-through capability enhancement in PMSG-wind systems

2020 ◽  
pp. 0309524X2098177
Author(s):  
Mohamed Metwally Mahmoud ◽  
Hossam S Salama ◽  
Mohamed M Aly ◽  
Abdel-Moamen M Abdel-Rahim
Keyword(s):  
Fuzzy Logic Controller ◽  
Synchronous Generator ◽  
Electrical Network ◽  
Electricity Grid ◽  
Wind Energy Generation ◽  
Fault Ride Through ◽  
Three Phase ◽  
Hybrid Solution ◽  
Pi Controllers ◽  
Grid Side

Fault ride-through (FRT) capability enhancement for the growth of renewable energy generators has become a crucial issue for their incorporation into the electricity grid to provide secure, reliable, and efficient electricity. This paper presents a new FRT capability scheme for a permanent magnet synchronous generator (PMSG)-based wind energy generation system using a hybrid solution. The hybrid solution is a combination of a braking chopper (BC) and a fuzzy logic controller (FLC). All proportional-integral (PI) controllers which control the generator and grid side converters are replaced with FLC. Moreover, a BC system is connected to the dc link to improve the dynamic response of the PMSG during fault conditions. The PMSG was evaluated on a three-phase fault that occurs on an electrical network in three scenarios. In the first two scenarios, a BC is used with a PI controller and FLC respectively. While the third scenario uses only FLC without a BC. The obtained results showed that the suggested solution can not only enhance the FRT capability of the PMSG but also can diminish the occurrence of hardware systems and reduce their impact on the PMSG system. The simulation tests are performed using MATLAB/SIMULINK software.

scholarly journals Full-Observable Three-Phase State Estimation Algorithm Applied to Electric Distribution Grids

Energies ◽  
2019 ◽  
Vol 12 (7) ◽  
pp. 1327 ◽  
Author(s):  
Thiago Soares ◽  
Ubiratan Bezerra ◽  
Maria Tostes
Keyword(s):  
State Estimation ◽  
Real Time ◽  
Distribution Systems ◽  
Phase State ◽  
Reactive Power ◽  
Estimation Algorithm ◽  
Load Flow ◽  
Electrical Network ◽  
The Real ◽  
Three Phase

This paper proposes the development of a three-phase state estimation algorithm, which ensures complete observability for the electric network and a low investment cost for application in typical electric power distribution systems, which usually exhibit low levels of supervision facilities and measurement redundancy. Using the customers´ energy bills to calculate average demands, a three-phase load flow algorithm is run to generate pseudo-measurements of voltage magnitudes, active and reactive power injections, as well as current injections which are used to ensure the electrical network is full-observable, even with measurements available at only one point, the substation-feeder coupling point. The estimation process begins with a load flow solution for the customers´ average demand and uses an adjustment mechanism to track the real-time operating state to calculate the pseudo-measurements successively. Besides estimating the real-time operation state the proposed methodology also generates nontechnical losses estimation for each operation state. The effectiveness of the state estimation procedure is demonstrated by simulation results obtained for the IEEE 13-bus test network and for a real urban feeder.

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