A decomposition and coordination power system loss calculation for multi-area interconnected system

2011 ◽  
Author(s):  
Chen Fang ◽  
Zhang Li ◽  
Li Weiwei
Keyword(s):  
Power System ◽  
Interconnected System ◽  
Loss Calculation ◽  
Decomposition And Coordination

scholarly journals Modeling Wind Turbines in the Simulation of Power System Dynamics

2010 ◽  
Vol 26 (1) ◽  
pp. 41-47 ◽  
Author(s):  
Istvan Erlich ◽  
Fekadu Shewarega ◽  
Oliver Scheufeld
Keyword(s):  
Power System ◽  
System Dynamics ◽  
Wind Turbines ◽  
Reactive Power ◽  
Induction Machine ◽  
Generic Model ◽  
Variable Speed ◽  
Interconnected System ◽  
Power System Dynamics ◽  
Space Phasor

Modeling Wind Turbines in the Simulation of Power System DynamicsThis paper deals with the modeling of variable speed wind turbines for stability studies. Using the space-phasor representation and the fundamental relationships governing the operation of the machine quasi stationary model, suitable control algorithms for the simulation of the doubly-fed induction machine (DFIM) as well as the permanent magnet synchronous machine (PMSM) operating on an interconnected system are developed. The control schemes include the pitch-angle/speed control and the decoupled control of the real and reactive power outputs. As an additional modeling option, the generic model for variable speed machine has been introduced. The models were then implemented on a representative test network, and simulations have been carried out to observe the response of the control system to typical abnormal situations such as three phase grid faults to compare the accuracy of the generic models with the detailed quasi-stationary (QSS) models.

scholarly journals Future Directions for Power System Interconnection from Korea’s Perspective

2021 ◽  
pp. 48-53
Author(s):  
J. Yoon ◽  
S. Song
Keyword(s):  
Power System ◽  
Energy Security ◽  
Green Energy ◽  
Energy Utilization ◽  
Stable Operation ◽  
Interconnected System ◽  
Future Directions ◽  
System Interconnection ◽  
Term Energy ◽  
Northeast Asian

The power system interconnection between Northeast Asian countries has been discussed since 2000 but has not been realized to date due to various obstacles. This paper specifies the expected future energy policy, long-term energy supply plan, and necessity of power interconnection from the Korean viewpoint, including the climate change agreement. There are very many interconnection scenarios presented by various institutes in NEA countries now. These studies contain the overall preliminary feasibility results but do not consider the environmental effects, energy security, and market reforms. Do these existing studies show how we could interconnect specific countries? This paper discusses the trading potentials for green energy utilization between countries and some obstacles to be removed to promote the energy interconnection projects from technical, economic, marketable, and energy security standpoints. Especially, energy security in terms of politics, as well as vulnerability characteristics of renewable energy, could cause the interconnected system blackouts. These could be a serious obstacle to realization and continuous stable operation of these interconnection projects. Finally, this paper will specify the future directions and possible scenarios for power system interconnection by integrating these issues comprehensively from Korea's perspective.

Automatic Generation Control of Two Equal Areas with Traditional Controllers

2016 ◽  
Vol 7 (3) ◽  
pp. 610
Author(s):  
Ankita Rani ◽  
Harinder Singh ◽  
Krishan Arora
Keyword(s):  
Power System ◽  
Optimization Problems ◽  
Random Search ◽  
Automatic Generation ◽  
Generation Rate ◽  
Automatic Generation Control ◽  
Wind System ◽  
Interconnected System ◽  
Normal Period ◽  
Generation Control

Automatic generation control (AGC) is major issue in power system whose main purpose is to maintain the frequency and tie line power flow during normal period in an interconnected system. . Thus, It is the responsibility of the Power system engineers to ensure that adequate power is delivered to the load reliably and economically so that nominal condition will be re-established The main focus is to maintain the value of frequency in its prescribed limit. We use renewable source which are important as well as non renewable sources at the level of extinct. As renewable alone cannot reliable then we use interconnection of both for making the system reliable and more efficient.This research paper is devoted to explore the interconnection of the automatic generation control of hydro power system and wind system. The wind system is comprised with governor dead band, generation rate constraint and turbine dynamics where as the hydro system is comprised with generation rate constraint. The traditional PI controller does not have adequate control performance with the consideration of nonlinearities and turbine dynamics. To overcome this drawback, PID controllers helps in solving optimization problems by exploitation of random search. It will provide the system security also for maintain the frequency in prescribed limit with the help of simulation.

scholarly journals ANN based LFC with Coordination strategies of DERs in Hybrid Isolated Micro-Grid Environment

2021 ◽  
Vol 309 ◽  
pp. 01036
Author(s):  
Srikanth Boyini ◽  
Srividya Devi Palakaluri ◽  
Rekha Mudundi
Keyword(s):  
Power System ◽  
Frequency Control ◽  
Active Power ◽  
Load Frequency Control ◽  
Injection System ◽  
Renewable Energy Resources ◽  
Interconnected System ◽  
Load Frequency ◽  
Power Injection ◽  
Micro Grid

This paper provides a load frequency control (LFC) of a micro grid with renewable energy resources (RES). The operation of micro grid with a low inertia system leds to disturbances in power system. The disturbances in frequency is more in micro grid than conventional power system. So there should be a fast recovery of changes in frequency with existing system and interconnected system (RES). Active power injection is the main scheme to control frequency of a system. The matlab simulink tells us that different active power injection system contribute for the fast control of grid frequency with PID controller. The use of ANN technology to this system the load frequency control can be illustrated in faster rate of its recovery. An ANN controller is investigated which handles the inputs collectively in each sector of the power system. Back-transmission time is normally used in the study for neural network education. The performance of the power system is simulated independently with a typically integrated conventional controller and ANN controller. A complete spectrum of small signals is introduced for RESs in the isolated microgrid and a correct role in frequency control studies is taken into account.

scholarly journals Coordinated Control for a Group of Interconnected Pairwise Subsystems

2013 ◽  
Vol 2013 ◽  
pp. 1-10
Author(s):  
Chen Ma ◽  
Xue-Bo Chen
Keyword(s):  
Power System ◽  
Design Process ◽  
Information Structure ◽  
Controller Design ◽  
Coordinated Control ◽  
Interconnected System ◽  
Two Systems ◽  
Structure Constraint ◽  
System Inclusion

The implementation of pairwise decomposition is discussed on an interconnected system with uncertainties. Under the concept of system inclusion, two systems with the same expanded system achieved by the same expand transformation are considered as approximations. It is proven that a coordinated controller can be found to stabilize both the two systems. This controller is contracted from the coordinated controller of expanded system, with each pairwise subsystem having information structure constraint taken into consideration. At last, this controller design process is applied on a four-area power system treated as a group of subsystems with information structure constraints.

scholarly journals Effect of Considering Transmission Losses in Economic Dispatch – A Case Study of Oman’s Main Interconnected System

2018 ◽  
Vol 13 (1) ◽  
pp. 1 ◽  
Author(s):  
M.H. Albadi ◽  
F.N. Al Farsi ◽  
Nasser Hosseinzadeh ◽  
Abdullah Al-Badi
Keyword(s):  
Power System ◽  
Optimization Problem ◽  
Economic Dispatch ◽  
Loss Coefficient ◽  
Optimization Process ◽  
Transmission Losses ◽  
Power System Planning ◽  
System Planning ◽  
Interconnected System

Economic dispatch is an important optimization problem in power system planning. This article presents an overview of the economic dispatch formulation, its objective, loss coefficient determination, and a case study. In the case study, different scenarios of the economic dispatch in the main interconnected system (MIS) of Oman were considered to highlight the importance of considering losses in the optimization process.

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