scholarly journals Investigating continuous power flow solutions of IEEE 14‐bus system

2018 ◽  
Vol 14 (1) ◽  
pp. 157-159 ◽  
Author(s):  
Bin Liu ◽  
Feng Liu ◽  
Bingxu Zhai ◽  
Haibo Lan
Keyword(s):  
Power Flow ◽  
Continuous Power ◽  
Bus System

scholarly journals Automatic Restoration of the Network by using Distributed Energy Sources

2019 ◽  
Vol 8 (11) ◽  
pp. 2992-2996
Keyword(s):  
Power System ◽  
Power Flow ◽  
Energy Sources ◽  
Distributed Energy ◽  
Power Outages ◽  
Power Outage ◽  
Distributed Generators ◽  
Grid Operators ◽  
Continuous Power ◽  
Bus System

Now-a-days power outage is a big problem. The grid operators cannot control the power flow from grid to the consumers. Even though many changes have been done in the power system there still exists power outages and grid operators could not guarantee the continuous power flow. In this context this paper deals with the rerouting of lines is done when there is a fault in a line. The same is happened in the case of a generator, Distributed Generators (DGs) are used. DG is a generator which is run on Biomass, small hydro or any gas station. DGs are only few MW and serve only when main generator is out of service. These generators are located near the load centre. The same concept is incorporated in this paper and the software used here is the Power World simulator. This paper deals with the normal 6 bus system and it is also applied for RBTS IEEE 6 bus system by using power world simulator.

scholarly journals Performance Analysis of Grid Integrated Hydro and Solar Based Hybrid Systems

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Sweeka Meshram ◽  
Ganga Agnihotri ◽  
Sushma Gupta
Keyword(s):  
Power Flow ◽  
Power Plants ◽  
Energy Systems ◽  
Constant Current ◽  
Generation System ◽  
Hydro Power ◽  
Current Controller ◽  
Solar Inverter ◽  
Utility Grid ◽  
Continuous Power

The renewable energy systems (RESs) are an attractive option to electrify the community as they are environment friendly, free of cost, and all-pervading. The efficiency of these energy systems is very low and can be improved by integrating them in parallel. In this paper, hydro (7.5 kW) and solar systems (10 kW) are taken as RESs and connected with the utility grid. Due to the intermittent nature of both the hydro and photovoltaic energy sources, utility grid is connected to the system for ensuring the continuous power flow. The hydro power generation system uses the self excited induction generator (SEIG) and converters. The AC/DC/AC converter is used as interface to connect the hydro turbine to the utility grid to adjust the generated voltage to the utility grid voltage. The solar generation system is the combination of PV array, boost converter, and solar inverter. The control of both the hydro and solar power plants is provided through the constant current controller. The analysis has been done to verify the existence of the proposed system. Results demonstrate that the proposed system is able to be put into service and can feed the community.

scholarly journals Evaluation and Analysis of Available Transfer Capability in Deregulated Power System Environment

2018 ◽  
Vol 7 (1.8) ◽  
pp. 188
Author(s):  
M Dhana Sai Sri ◽  
P Srinivasa Varma
Keyword(s):  
Power System ◽  
Power Flow ◽  
Optimal Power Flow ◽  
Reactive Power ◽  
Simulation Analysis ◽  
Available Transfer Capability ◽  
High Efficient ◽  
Transfer Capability ◽  
Power System Market ◽  
Bus System

Reliability of network is need of the hour in the present power system market and is constrained by capability of the network. The network calculations are performed using accurate and high efficient strategies. In order to perform power transactions in the system, the computation of available transfer capability is essential which a metric of capability of the system. Generally, effect wattless power is not taken into account in the methodologies for computation of linear available transfer capability. In this paper, a methodology which considers the reactive power flows for enhancement of linear ATC is presented. In order to perform analysis theoretically, a standard IEEE 3 bus system is considered. Another case study i.e., 14 bus system available in IEEE test systems is used for simulation analysis. FACTS technology is incorporated in the existing system in order to enhance capability of the network. To facilitate transfer maximum power in the system, an optimal power-flow-based ATC enhancement model is formulated and presented along with simulation results. Studies based on the IEEE 3-bus system and 14-bus systems with TCSC demonstrate the effectiveness of FACTS control on ATC enhancement.  

Decoupled AC/DC Power Flow Strategy for Multiterminal HVDC Systems

2018 ◽  
Vol 19 (1) ◽  
Author(s):  
Yixiang Gao ◽  
Shuhui Li ◽  
Weizhen Dong ◽  
Bing Lu
Keyword(s):  
Power Flow ◽  
Control Mode ◽  
Power Flow Calculation ◽  
Flow Calculation ◽  
Power System Control ◽  
Flow Method ◽  
Hvdc System ◽  
Dc Power ◽  
Bus System ◽  
Power Flow Method

AbstractThis paper proposes a decoupled AC/DC power flow approach for multi-terminal HVDC systems. The proposed method simplifies the power flow computation of multi-terminal HVDC systems while accurately reflecting the operation and control characteristics of VSC (voltage source converter) stations in a HVDC network. In the DC network, the power flow calculation is conducted based on a slack DC bus VSC station and power commends issued to other VSC stations from the power system control center. Then, in the AC power flow calculation, VSC stations are treated as special AC generators that can generate and absorb power from the AC grid in active and reactive power or active power and bus voltage control mode. For validation purpose, the conventional unified power flow method for multi-terminal HVDC systems is built. The paper compares the proposed method with the unified power flow method for an 8-bus multi-terminal HVDC system based on MATPOWER. Then, more case studies for different VSC control modes are conducted and evaluated for the 8-bus system. Afterwards, the proposed method is applied to the power flow study of a more practical and complicated multi-terminal HVDC system based on the IEEE 118-bus system.

A Novel Optimization Algorithm for Transient Stability Constrained Optimal Power Flow

2016 ◽  
pp. 147-176
Author(s):  
Sourav Paul ◽  
Provas Kumar Roy
Keyword(s):  
Power Systems ◽  
New England ◽  
Power Flow ◽  
Optimal Power Flow ◽  
Transient Stability ◽  
Linear Optimization ◽  
Standard Test ◽  
Optimal Power ◽  
Teaching Learning ◽  
Bus System

Optimal power flow with transient stability constraints (TSCOPF) becomes an effective tool of many problems in power systems since it simultaneously considers economy and dynamic stability of power system. TSC-OPF is a non-linear optimization problem which is not easy to deal directly because of its huge dimension. This paper presents a novel and efficient optimisation approach named the teaching learning based optimisation (TLBO) for solving the TSCOPF problem. The quality and usefulness of the proposed algorithm is demonstrated through its application to four standard test systems namely, IEEE 30-bus system, IEEE 118-bus system, WSCC 3-generator 9-bus system and New England 10-generator 39-bus system. To demonstrate the applicability and validity of the proposed method, the results obtained from the proposed algorithm are compared with those obtained from other algorithms available in the literature. The experimental results show that the proposed TLBO approach is comparatively capable of obtaining higher quality solution and faster computational time.

Using Hybrid Power Flow Controller (HPFC) to Improve Performance of Old and Existing Compensators in Power System

2012 ◽  
Vol 622-623 ◽  
pp. 1048-1055 ◽  
Author(s):  
Mojtaba Hakimzadeh ◽  
Reza Sedaghati ◽  
Masoud Parhoodeh
Keyword(s):  
Power System ◽  
Power Flow ◽  
Reactive Power ◽  
Hybrid Structure ◽  
Improve Performance ◽  
Matlab Software ◽  
Hybrid Power ◽  
Flow Controller ◽  
Continuous Power ◽  
Power Flow Controller

In this paper, a hybrid topology of FACTS devices has been investigated to improve stability features of static voltage. The primary assumption is a power system which has been located under SVC parallel compensation. HPFC forms a hybrid controller using IPFC series converters as a hybrid with existing parallel and passive compensator (SVC) in power system. Thus, simultaneous and independent control of active power flow can be reached through transmission lines and the exchanged reactive power values towards sending and receiving line. Using a hybrid structure makes the use of convertors to improve performance of the old and existing compensators in the power system possible. In this study, the power injection model (PIM) has been used to model series-parallel parts of hybrid power flow controller in Newton-Raphson load flow, and all have been simulated in M-file environment of MATLAB software. In order to investigate the effect of this controller on stability properties of static voltage, P-V curve of PQ buses of a prototype system has been evaluated in a continuous power flow (CPF) in M-file environment of MATLAB software. In the section of simulation results, SVC parallel compensation and UPFC series-parallel compensation are compared in terms of the amount of losses, active and reactive power, and improvement of the system’s loading limit with the proposed hybrid structure.

Power Quality Improvement in Fourteen Bus System using Non-Conventional Source Based ANN Controlled DPFC System

2016 ◽  
Vol 4 (3) ◽  
pp. 499
Author(s):  
Akhib Khan Bahamani ◽  
G.M. Sreerama Reddy ◽  
V. Ganesh
Keyword(s):  
Quality Improvement ◽  
Power Flow ◽  
Closed Loop ◽  
Open Loop ◽  
Ohmic Loss ◽  
Loss Reduction ◽  
Power Quality Improvement ◽  
The Comparative Study ◽  
Power Flow Controller ◽  
Bus System

DPFC can be used to improve receiving end voltage of fourteen bus system. This paper shows the conception and simulation of wind and solar based distribution power flow controller for sag compensation and ohmic loss reduction. The objectives of this work are to improve the voltage and reduce the line losses. Fourteen bus systems with DPFC in open loop is simulated. Fourteen bus system with DPFC in closed loop using PI and ANN are also simulated and the results are presented. The comparative study is presented to demonstrate the improvement in dynamic response of ANN controlled DPFC system. ANN is observed to provide better control than has other controllers and improved damping characterises.

Voltage Stability Improvement in Fourteen Bus System during Line Interruption using DPFC

2017 ◽  
Vol 8 (2) ◽  
pp. 705
Author(s):  
Akhib Khan Bahamani ◽  
G.M. Sreerama Reddy ◽  
V. Ganesh
Keyword(s):  
Normal Level ◽  
Power Flow ◽  
Voltage Stability ◽  
Reactive Power ◽  
Simulation Studies ◽  
State Space Method ◽  
Real Power ◽  
Simulation Results ◽  
Space Method ◽  
Bus System

<p>DPFC is proposed in the present work to improve voltage stability of fourteen bus system during line interruption. The voltage across the load decreases due to the interruption of the line. State space method is used to calculate Line currents and bus voltages. The ability of DPFC to bring voltage, real power and reactive power to normal level is presented in this paper. The simulation results for healthy system, line interrupted system without DPFC and with DPFC are presented. The results of comparative study are presented to show the improvement in power quality. The simulation studies indicate that the power flow with DPFC during line outage is almost equal to the power during healthy condition.</p>

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