The Analysis of the Effectiveness of Standard Protection Devices in Supply Systems Fed from Synchronous Generator Sets

2018 ◽  
Author(s):  
Pawel Albrechtowicz ◽  
Jerzy Szczepanik
Keyword(s):  
Synchronous Generator ◽  
Protection Devices ◽  
Generator Sets ◽  
Supply Systems

scholarly journals The Short-Circuit Protections in Hybrid Systems with Low-Power Synchronous Generators

Energies ◽  
2020 ◽  
Vol 14 (1) ◽  
pp. 160
Author(s):  
Bartosz Rozegnał ◽  
Paweł Albrechtowicz ◽  
Dominik Mamcarz ◽  
Natalia Radwan-Pragłowska ◽  
Artur Cebula
Keyword(s):  
Single Phase ◽  
Low Voltage ◽  
Short Circuit ◽  
Circuit Breaker ◽  
Synchronous Generator ◽  
Synchronous Generators ◽  
Electrical Systems ◽  
Protection Devices ◽  
Short Circuits ◽  
Damage Type

Single-phase short-circuits are most often faults in electrical systems. The analysis of this damage type is taken for backup power supply systems, from small power synchronous generators. For these hybrid installations, there is a need for standard protection devices, such as fuses or miniature circuit breaker (MCB) analysis. Experimental research mentioned that a typical protective apparatus in low-voltage installations, working correctly during supplying from the grid, does not guarantee fast off-switching, while short-circuits occur during supplication from the backup generator set. The analysis of single-phase short-circuits is executed both for current waveform character (including sub-transient and transient states) and the carried energy, to show the problems with the fuses and MCB usage, to protect circuits in installations fed in a hybrid way (from the grid and synchronous generator set).

scholarly journals International Standardization in the Design of “Shore to Ship” - Power Supply Systems of Ships in Port

2018 ◽  
Vol 26 (1) ◽  
pp. 9-13 ◽  
Author(s):  
Dariusz Tarnapowicz ◽  
Sergiej German-Galkin
Keyword(s):  
Air Pollution ◽  
Power Supply ◽  
Source Power ◽  
Standards And Regulations ◽  
International Standardization ◽  
Generator Sets ◽  
Pollution Emissions ◽  
Supply Systems ◽  
Air Pollution Emissions

Abstract The decisive source of air pollution emissions in ports is the berthed ships. This is primarily caused by the work of ship’s autonomous generator sets. One way of reducing the air pollution emissions in ports is the supply of ships from electricity inland system. The main problem connected with the power connection of ships to the inland network is caused by different values of levels and frequencies of voltages in these networks (in various countries) in relation to different values of levels and frequencies of voltages present in the ship’s network. It is also important that the source power can range from a few hundred kW up to several MW. In order to realize a universal „Shore to Ship” system that allows the connection of ships to the electricity inland network, the international standardization is necessary. This article presents the current recommendations, standards and regulations for the design of „Shore to Ship” systems.

Modeling and Simulation of Ship Generator Sets

2014 ◽  
Vol 1070-1072 ◽  
pp. 1898-1901
Author(s):  
Dong Xiang ◽  
Hao Xiong ◽  
Ning Bo Liu ◽  
Qiang Wu ◽  
Guang Wei Meng
Keyword(s):  
Mathematical Models ◽  
Static Load ◽  
Synchronous Generator ◽  
System Model ◽  
Technical Requirements ◽  
Speed Governor ◽  
Simulation Results ◽  
Synchronous Generator Excitation ◽  
Speed Governor System ◽  
Generator Sets

This paper establishes the mathematical models of the ship generator sets, including the diesel, speed governor system, synchronous generator, excitation system and static load, simulates the ship generator sets by Matlab/Simulink software, and tests the performance of each system to verify effectiveness of the models. The simulation results indicate that the whole system model meets technical requirements of military standard GJB.

scholarly journals Modelling& Simulation and Protection& Control Verification Method for Asynchronous Motor-Synchronous Generator Sets

2020 ◽  
Vol 185 ◽  
pp. 01033
Author(s):  
Shuyang Wang ◽  
Qiu Xia ◽  
Xingguo Wang ◽  
Yarong Guo ◽  
Zhengguang Chen ◽  
...  
Keyword(s):  
Power Supply ◽  
Power Supply System ◽  
Asynchronous Motor ◽  
Synchronous Generator ◽  
Supply System ◽  
Synchronous Generators ◽  
Large Power ◽  
Verification Method ◽  
Digital Modelling ◽  
Generator Sets

Power supply system made of asynchronous motor-synchronous generator sets (M-G sets) is often used as power supply for important loads. The system usually consists of two M-G sets. Unlike synchronous generators connecting to large power grid, the two generators in the system can have significant effect on the other when field loss fault occurs. If the protection settings are inappropriate, the two generators may trip one after another during a fault on a single generator, causing the important load losing all the power supply. This paper proposed a simulation and protection verification method based on the RTDS digital modelling for M- G sets including detailed excitation system. The modelling and simulation methods can effectively verify the reasonability of settings of the P-Q restriction of the excitation regulator and the PID controllers, and provide the important basis for the setting of over-current protection and loss of excitation protection, ensuring the safe operation of the power supply system made of M-G sets.

scholarly journals Study of cyber security of predictive control algorithms for distributed generation plants

2021 ◽  
pp. 19-34
Author(s):  
Yuri Bulatov ◽  
◽  
Andrey Kryukov ◽  
◽  
Keyword(s):  
Distributed Generation ◽  
Predictive Control ◽  
Power Supply ◽  
Cyber Security ◽  
Synchronous Generator ◽  
Computer Models ◽  
Electric Power System ◽  
Control Algorithms ◽  
Microprocessor Technology ◽  
Supply Systems

The power industry is currently actively developing the field related to the use of distributed generation plants located near the power receiving devices of consumers. At the same time, the introduction of distributed generation plants causes a lot of engineering problems which need solutions. One of them is the optimization of the settings of automatic voltage regulators (AVR) and speed regulators (ASR) of synchronous generators in all possible operating modes. This requires the use of complex models of power supply systems, distributed generation plants and their regulators, as well as labor-intensive calculations that take into account a large number of interrelated parameters. However, there is another approach based on the use of predictive controllers. In this case only one parameter is needed for linear predictive models.The article describes a method for constructing and tuning the proposed predictive ASR synchronous generator, as well as computer models of distributed generation plants used in research. The purpose of the research was to determine cyber security of power supply systems equipped with various distributed generation plants with predictive speed controllers that can be implemented on the basis of the microprocessor technology. The studies were carried out in the MATLAB system using the Simulink and SymPowerSystems simulation packages on computer models of distributed generation plants with one turbine generator operating at a dedicated load, as well as a group of hydrogenerators connected to a high-power electric power system. The simulation results showed the effectiveness of the proposed predictive control algorithms, as well as the fact that their cyber security can be increased by introducing hardware restrictions on the range of changes in the time constant of the predictive link.

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