scholarly journals STUDY ON EFFECT OF UPFC DEVICE IN ELECTRICAL TRANSMISSION SYSTEM: POWER FLOW ASSESSMENT

2013 ◽  
pp. 70-74
Author(s):  
CH. CHENGAIAH ◽  
R.V.S. SATYANARAYANA ◽  
G.V. MARUTHESWAR MARUTHESWAR
Keyword(s):  
Transmission Lines ◽  
Power Flow ◽  
Reactive Power ◽  
Power Transmission ◽  
Stability Limit ◽  
Transmission System ◽  
Real Time Control ◽  
Electrical Transmission ◽  
Transmission Systems ◽  
Time Control

The power transfer capability of electric transmission lines are usually limited by large signals ability. Economic factors such as the high cost of long lines and revenue from the delivery of additional power gives strong intensive to explore all economically and technically feasible means of raising the stability limit. On the other hand, the development of effective ways to use transmission systems at their maximum thermal capability. Fast progression in the field of power electronics has already started to influence the power industry. This is one direct out come of the concept of FACTS aspects, which has become feasible due to the improvement realized in power electronic devices in principle the FACTS devices should provide fast control of active and reactive power through a transmission line. The UPFC is a member of the FACTS family with very attractive features. This device can independently control many parameters. This device offers an alternative mean to mitigate transmission system oscillations. It is an important question is the selection of the input signals and the adopted control strategy for this device in order to damp power oscillations in an effective and robust manner. The UPFC parameters can be controlled in order to achieve the maximal desire effect in solving first swing stability problem. This problem appears for bulky power transmission systems with long transmission lines. In this paper a MATLAB Simulink Model is considered with UPFC device to evaluate the performance of Electrical Transmission System of 22 kV and 33kV lines. In the simulation study, the UPFC facilitates the real time control and dynamic compensation of AC transmission system. The dynamic simulation is carried out in conjunction with the N-R power flow solution sequence. The updated voltages at each N-R iterative step are interpreted as dynamic variables. The relevant variables are input to the UPFC controllers.

scholarly journals STATCOM’s contribution to the improvement of voltage plan and power flow in an electrical transmission network

2018 ◽  
Vol 8 (1) ◽  
pp. 41-52
Author(s):  
Adel Amiar ◽  
Mohamed Adjabi
Keyword(s):  
Power Flow ◽  
Reactive Power ◽  
Power Transmission ◽  
Dynamic Performance ◽  
Voltage Regulation ◽  
Transmission Network ◽  
Electrical Transmission ◽  
Transmission Systems ◽  
Power Transmission Systems ◽  
Flexible Alternating Current Transmission

Flexible alternating current transmission systems are used since nearly four decades and present very good dynamic performances. The purpose of this work is to study the behaviour of a system where static compensator (STATCOM) is located at the midpoint of a long transmission line functioning in disturbed modes with various levels of load caused by tripping and then, reclosing of the incoming station breaker. The studied model and starting from the analysis of various alternatives will lead to the checking of the aptitude of the STATCOM to maintain the voltage plan and to improve the power flow in electro-energetic system which is the east region of Algerian 400 kV transmission network. The steady state performance of STATCOM’s controller is analysed through computer simulations with MATLAB/Simulink program. The simulation results have demonstrated that STATCOM can be effectively applied in power transmission systems to solve the problems of poor dynamic performance and voltage regulation.   Keywords: STATCOM, reactive power, power flow, voltage plan, breaker automatic recloser.

scholarly journals Power System Security with Contingency Technique by using SSSC & UPFC

2019 ◽  
Vol 8 (2S11) ◽  
pp. 772-777
Keyword(s):  
Power System ◽  
Phase Angle ◽  
Transmission Lines ◽  
Power Flow ◽  
Reactive Power ◽  
Power Transmission ◽  
Electrical Power ◽  
Unified Power Flow Controller ◽  
Electrical Power System ◽  
Power Requirement

Now days’ electrical power requirement has enlarged expanding as expansion & restructuring of electrical power system (PS) for generation & transmission in power sector is critically limited due to current resources & environmental circumstances. As outcome, approximately of corridors of power transmission overhead lines are greatly loaded & congested. Also major issue of power system voltage stability becomes power transfer restricted and capability issue. A Modern power electronics technology FATCS considered device Static Synchronous Series Compensator (SSSC) is VSC demanded series FACTS equipment. Unified power flow controller (UPFC) is to manage power flow (PF), voltage magnitude & phase angle. In this research paper suggested to maintain voltage magnitude as well as PF of faulty lines. The consequence of mutation of PS parameters like voltage, phase angle, active power, reactive power, & overall power factor with & without SSSC & UPFC have also incorporated. Assessment of PS safety is essential in society to expand customs to sustain system functions when one or more components fail. A PS is "secure" when it can defy loss of one or more ingredients & still go on working without major problems. The Contingency event investigation technique is taken to identify electrical node PF in faulty transmission lines (TL). The Performance of PS has been tested on IEEE 14-Bus System.

scholarly journals Automatic Identification and Importance Evaluation Technology of Power Transmission Section

2020 ◽  
Vol 213 ◽  
pp. 03036
Author(s):  
Yixuan Weng ◽  
Weizhe Ma ◽  
EnYan Xie ◽  
Hui Qi ◽  
Zhenxing Liu ◽  
...  
Keyword(s):  
Cross Section ◽  
Transmission Lines ◽  
Power Flow ◽  
Power Transmission ◽  
Power Grid ◽  
Stability Limit ◽  
Stability Margin ◽  
Automatic Identification ◽  
Flow State ◽  
The Impact

In theory, the cross section is the minimum cut set in the network. For the actual power grid, the transmission cross section is a collection of transmission lines between different regions, which is mainly used for power transmission to achieve the purpose of generating load balance. In this paper, a power grid zoning algorithm is proposed based on the topological structure characteristics and current operation state of the power grid, and the key transmission sections can be directly obtained without depending on the calculation of safety and stability margin. A practical system state partition model and key section sorting method are introduced, and a set of automatic identification method flow of key transmission sections of the system is established by searching for electrical betweenness. The importance of the transmission section is quantitatively evaluated from three angles: the margin from the stability limit, the hub position in the current power flow state, and the impact on the power grid after the power cut-off. The evaluation results can be used as a Reference for decision-making in the planning and reconstruction of the transmission section, safety monitoring, protection configuration, etc.

scholarly journals Considering FACTS in Optimal Transmission Expansion Planning

2017 ◽  
Vol 7 (5) ◽  
pp. 1987-1995 ◽  
Author(s):  
K. Soleimani ◽  
J. Mazloum
Keyword(s):  
Power Systems ◽  
Transmission Lines ◽  
Power Transmission ◽  
Transmission System ◽  
Optimal Number ◽  
Transmission Systems ◽  
Expansion Planning ◽  
Facts Devices ◽  
Transmission Expansion ◽  
Expansion Plan

The expansion of power transmission systems is an important part of the expansion of power systems that requires enormous investment costs. Since the construction of new transmission lines is very expensive, it is necessary to choose the most efficient expansion plan that ensures system security with a minimal number of new lines. In this paper, the role of Flexible AC Transmission System (FACTS) devices in the effective operation and expansion planning of transmission systems is examined. Effort was taken to implement a method based on sensitivity analysis to select the optimal number and location of FACTS devices, lines and other elements of the transmission system. Using this method, the transmission expansion plan for a 9 and a 39 bus power system was performed with and without the presence of FACTS with the use of DPL environment in Digsilent software 15.1. Results show that the use of these devices reduces the need for new transmission lines and minimizes the investment cost.

A Novel Technique of Power Flow Control in Transmission Lines Using Interline Power Flow Control

2016 ◽  
Vol 3 (2) ◽  
pp. 296
Author(s):  
Pankaj Aswal ◽  
Suyash Kumar Singh ◽  
Apurv Thakur ◽  
Kshitij Gaur
Keyword(s):  
Flow Control ◽  
Transmission Lines ◽  
Power Flow ◽  
Reactive Power ◽  
Transmission System ◽  
Power Flow Control ◽  
Flexible Ac Transmission System ◽  
Multiple Line ◽  
Reactive Power Flow ◽  
Ac Transmission

The interline power flow control (IPFC) is the flexible AC transmission system controller (FACTS) came into accountability to control the flow of power in multiple line transmission system. The following paper demonstrates the IPFC modelling using Matlab Simulink. Power flow calculations has been made using Gauss-Seidel Method. Optimization of power in terms of real and reactive power flow is achieved by comparing the actual calculated term and the predicted value.

scholarly journals OPTIMAL POWER FLOW USING STATCOM

2021 ◽  
Vol 5 (10) ◽  
Author(s):  
Tanisha Bharol ◽  
Pranjali Bora ◽  
Sravani Sai M ◽  
Dhruvi Bansal ◽  
Dr. Sandeep Sharma
Keyword(s):  
Power System ◽  
Transmission Lines ◽  
Power Flow ◽  
Optimal Power Flow ◽  
Reactive Power ◽  
Stability Limit ◽  
Active Power ◽  
Main Concern ◽  
Optimal Power ◽  
Active Power Flow

— In power system, active power flow is the main concern in order to manage the demand supply. The maximum use of the transmission lines under their stability limit is very much required. Flexible alternating current transmission system (FACTS) device are very much useful to control power system parameters. A STATCOM (STATCOM) is a FACTS device which is able to control active and reactive power with voltage magnitude and phase angle. In this paper, STATCOM is used in a 10 bus system to control the flow of active power under contingency condition. Simulation result shows the effectiveness of the STATCOM in providing the optimal power flow in the power system considered here.

Improving Power Flow of Power Transmission System Using UPFC

2014 ◽  
Vol 9 (9th) ◽  
pp. 1-16
Author(s):  
Heba Allah Ahmed ◽  
T. Abdel Salam ◽  
M. Mostafa ◽  
M. Badr
Keyword(s):  
Power Flow ◽  
Power Transmission ◽  
Transmission System ◽  
Power Transmission System

Real-Time Control of Reactive Power in a Power Plant

1985 ◽  
Vol 18 (5) ◽  
pp. 951-956 ◽  
Author(s):  
I. Vajk ◽  
M. Vajta ◽  
K. Kovacs
Keyword(s):  
Power Plant ◽  
Real Time ◽  
Reactive Power ◽  
Real Time Control ◽  
Time Control

Multilevel Inverter Based DSTATCOM with Energy Storage Device

2011 ◽  
Vol 55-57 ◽  
pp. 1361-1364
Author(s):  
Jun Li Zhang ◽  
Xiao Feng Lv ◽  
Chao Li
Keyword(s):  
Energy Storage ◽  
Power Flow ◽  
Reactive Power ◽  
Power Transmission ◽  
Electronic Device ◽  
Multilevel Inverter ◽  
Voltage Source ◽  
Storage Device ◽  
Energy Storage Device ◽  
Reactive Power Flow

With the growth of industry manufacturers and population, power quality becomes more and more important issue, and is attracting significant attention due to the increase in the number of sensitive loads. A distribution static compensator (DSTATCOM) is a voltage source inverter (VS1)-based power electronic device, which is usually used to compensate reactive power and sustain the system voltage in distribution power system. Compared with the traditional STATCOM, multilevel STATCOMs exhibit faster dynamic response, smaller volume, lower cost, and higher ratings. A multilevel inverter connected to an energy storage device can control both active and reactive power flow, providing more flexible and versatile power transmission operation. SPWM is actually a kind of multi-pulse trigger mode and used to trigger the switches in DSTATCOM.

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