scholarly journals Advanced Power Network System-Autonomous Demand Area Power System

2005 ◽  
Vol 125 (3) ◽  
pp. 156-158 ◽  
Author(s):  
Hiromu KOBAYASHI
2014 ◽  
Vol 986-987 ◽  
pp. 404-411
Author(s):  
Qi Yang ◽  
Xin Zeng ◽  
Qing Kui Guo ◽  
Yong Yu Yuan ◽  
Jian Jun Sun ◽  
...  

Through the summary of typical accident, the problem between the over speed protection device of thermal power unit steam turbine and over frequency generator tripping measure is analyzed in island operation of sending ends of regional grid. The optimizing allocation principle between over frequency generator tripping measure and over speed protection equipment is put forward. By a variety of program analysis and comparison, the optimizing scheme is given. Finally, the typical models of thermal power unit steam turbine over speed protection are established in software. Based on a practical power system as an example, the whole process of islanding is simulated. Checking the coordination with existing over frequency generator tripping measure and the relay setting related to power network in the islanding operation, the validity and practicability of the optimal scheme and principle are analyzed. With the method, the regional grid will remain safe and stable.


2005 ◽  
Vol 42 (02) ◽  
pp. 80-87
Author(s):  
Weifeng Shi ◽  
Tianhao Tang

For marine engineer training, marine power system analysis and fault diagnoses, a marine power system simulator (MPSS) is proposed here. It has been developed by applying system simulation techniques. The main techniques employed were marine power system modeling, microcomputer control, and local area network communication. Some functions and typical fault simulations produced with the MPSS are introduced. These operations are particularly useful for marine engineer training. A marine power system model is built by applying the power system dynamic stability theory. The power system model is the most important element in the simulator. The system model is made of a diesel engine generator, induction motor, power network, and so on. Many simulation results were obtained, such as starting the lubricating oil pump and a power network three-phase ground fault. Because the system offers online control, local area network communication, and human-machine interface of information, this MPSS is used extensively in marine engineer training where the standard is professional skill in marine electrical technology. The system has been used to meet the standards of the STCW78/95 international convention in many marine companies and training centers in China with good results.


2012 ◽  
Vol 433-440 ◽  
pp. 2561-2565 ◽  
Author(s):  
Phan Thi Huyen Chau ◽  
Eric Zamai ◽  
Pham Thi Ngoc Yen

The focus of the present paper is on modeling the distribution grid using Petri Net for reconfiguration. Such system can be described as node and connection. So modeling this system is to model the node and connection in order to describe all the actions in the system then collect the data . Each connection in the power network will be transfer to Petri Net according to the designing of the fiche. Then the whole system can be modeled by Process Algebra Petri Net (PPN). It makes the grid more compact and easier to monitor


2013 ◽  
Vol 448-453 ◽  
pp. 2455-2460 ◽  
Author(s):  
Marina N. Dubyago

Research of stability of the power systems (PS) assumes the analysis of stability static or dynamic both generators, and engines. This article represents creations of the PS mathematical model is considered as sequence of two stages: creation of models of separate elements; creation of model of their interaction. The mathematical description of a site of distributive system on the example of the synchronous generator.


2014 ◽  
Vol 521 ◽  
pp. 196-199
Author(s):  
Li Jun Qin ◽  
Chao Xiong

This paper mainly studies the generation mechanism of the power grid network loss and discusses Gauss - Seidel method, Newton-Raphson method,and PQ decomposition method of power network loss.


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