Real Time Implementation of a Wavelet Power Based Algorithm for Three-Phase Synchronous Generator Protection

2006 ◽  
Author(s):  
M.A.S.K. Khan ◽  
O. Ozgonenel ◽  
M.A. Rahman
Keyword(s):  
Real Time ◽  
Synchronous Generator ◽  
Generator Protection ◽  
Three Phase

scholarly journals Real Time Load Angle Application for Synchronous Generator Protection Purposes

2020 ◽  
Vol 69 (1) ◽  
pp. 13-17 ◽  
Author(s):  
Ivan Višić ◽  
Ivan Strnad ◽  
Tihomir Tonković
Keyword(s):  
Real Time ◽  
Synchronous Generator ◽  
Angle Measurement ◽  
New Approach ◽  
The Real ◽  
Generator Protection ◽  
Step Generator ◽  
Load Angle

The out-of-step protection function is one of the key functions in generator protection. This function detects the loss of generator synchronism, and when such a fault occurs, it is necessary to disconnect the generator from the rest of the system as soon as possible in order to avoid major damages.The algorithms used in the out-of-step protection functions are based on the measurements of generator impedances and they use the impedance vectors to check if all stability criterions are met. This paper describes a new approach to realizing the out-of-step generator protection function by using the direct load angle measurement. The idea behind applying the real time load angle measurement is to faster detect the loss of synchronism.

scholarly journals Synchronous Generator Out of Step Detection Using Real Time Load Angle Data

Energies ◽  
2020 ◽  
Vol 13 (13) ◽  
pp. 3336
Author(s):  
Ivan Višić ◽  
Ivan Strnad ◽  
Ante Marušić
Keyword(s):  
Power System ◽  
Real Time ◽  
Synchronous Generator ◽  
Angle Measurement ◽  
Impedance Change ◽  
Generator Protection ◽  
Angle Measurements ◽  
Angle Data ◽  
Key Issues ◽  
Load Angle

Although the power system usually always appears stable and reliable to consumers, a lot of work and research goes into keeping the power system both stable and reliable under constantly changing conditions and in these increasingly demanding times. One of the key issues in the power system is maintaining stability after large disturbances in order to prevent the loss of synchronicity of the generators in the system. Today’s generator protection systems mostly use measurements of impedance change to detect generator out of step. This article discusses the possibility of detecting the loss of synchronicity by using real time load angle measurements. The authors propose a real time load angle measurement algorithm and present the results of the algorithm’s testing performed on a real hydrogenerator. The results show that the developed algorithm gives highly accurate real time load angle measurements with the maximum possible resolution and that the load angle can be used for detecting the synchronous generator out of step.

scholarly journals Three-Phase Power Converter-Based Real-Time Synchronous Generator Emulation

2017 ◽  
Vol 32 (2) ◽  
pp. 1651-1665 ◽  
Author(s):  
Liu Yang ◽  
Jing Wang ◽  
Yiwei Ma ◽  
Jingxin Wang ◽  
Xiaohu Zhang ◽  
...  
Keyword(s):  
Real Time ◽  
Synchronous Generator ◽  
Power Converter ◽  
Three Phase

scholarly journals Design of Optimal Real Time Emulators for Steam and Wind Turbines for Avoiding Risky Severe Conditions

2022 ◽  
Author(s):  
helmy El-Zoghby ◽  
Haitham S. Ramadan ◽  
Hassan Haes Alhelou
Keyword(s):  
Real Time ◽  
Wind Turbines ◽  
Large Scale ◽  
Short Circuit ◽  
Synchronous Generator ◽  
Fast Response ◽  
Operating Conditions ◽  
Control Approach ◽  
Three Phase ◽  
Experimental Validity

Abstract Modern energy infrastructures may face critical impacts on distributed generation and microgrids in presence of renewable and conventional energy sources. Fast restorations for these networks through proposing convenient proactive protection systems become mandatory for securing energy particularly after severe faults. This paper deals with presenting a descriptive modelling and comprehensive analysis of both steam and wind turbines using optimal real time emulators with unique testbench. Based on the dynamics of each turbine, both emulators are performed using 4kW, 180V, 1500r.p.m separately exited DC motor coupled to 2kW, 380V, 50Hz, 1500r.p.m three-phase synchronous generator. For real-time interface implementation, the mathematical models of steam and wind turbines are realized using LabVIEWTM software. The characterization and verification of both emulated steam and wind turbines are examined at different normal operating conditions in terms of steam valve position and wind speed, respectively. To regulate the current for both systems despite their diverse dynamics, a simple industrial proportional-integral (PI) controller is considered. Unlike other artificial intelligence-based controllers, the offline-controller gains are scheduled using genetic algorithm (GA) via MatlabTM software to ensure the due fast response to cope with unexpected faults. The experimental validity of both emulators is tested at the most severe abnormal operating conditions. The three-phase short circuit is considered at the generator terminals with different fault periods until reaching out-of-step conditions. From numerical analysis and experimental results, the characterization of both emulated steam and wind turbines explicitly mimics their real large-scale turbines in normal conditions. The emulators’ fast responses using the proposed GA-PI control approach are verified. Besides, the experimental dynamic behavior convergence and interoperability between the emulated and real systems for both steam and wind turbines are validated under severe conditions. The practical results confirm the fast-nature performance of the GA in avoid risky instability conditions.

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.

Real-Time Testing of WPT-Based Protection of Three-Phase VS PWM Inverter-Fed Motors

2007 ◽  
Vol 22 (4) ◽  
pp. 2108-2115 ◽  
Author(s):  
S. A. Saleh ◽  
T. S. Radwan ◽  
M. A. Rahman
Keyword(s):  
Real Time ◽  
Pwm Inverter ◽  
Three Phase
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