Subscribe to the gold package and get unlimited access to Shamra Academy
Register a new userDeveloping Algorithm and Program for Power Flow Analysis in Power System with STATCOM*
تطوير خوارزمية و برنامج حاسوبي لتحليل جريان الاستطاعة في نظم القدرة الكهربائية الحاوية على نظام STATCOM
2110
1 59
0
(
0
)
Authors
نبيل الفقيه( باحث )
Created by
Shamra Editor
Ask ChatGPT about the research
ُتعد مسألة إبقاء التوترات ضمن الحدود المطلوبة إحدى المسائل الأساسية في تشغيل نظام القدرة الكهربائية،و لما كانت توترات العقد في نظام القدرة تتأثر بشكل ملحوظ بتغيرات الأحمال و بدخول العناصر الكهربائية أو بخروجها على الدارة المكافئة لنظام القدرة كانت الحاجة إلى تنظيم التوتر بقابلية تحكم عالية. وبسبب تنامي استخدام أنظمة نقل التيار المتناوب المرنةبشكل عام و FACTS منها المعوضات التزامنية الساكنة STATCOM في نظم القدرة الكهربائية من أجل تحسين استقرار التوتر و بسبب الحاجة إلى برمجيات غير متاحة دومًا، كان هدف البحث هو تطوير نموذج رياضي و خوارزمية و برنامج حاسوبي لتحليل جريان الاستطاعة في الحالة المستقرة في نظام قدرة كهربائية يحتوي على معوض تزامني ساكن STATCOM . وسعت مصفوفة اليعقوبي في خوارزمية نيوتن-رافسون، و هي العلاقة بين التوتر و الاستطاعة في حالات عدم التطابق، بمتغيرات نظام STATCOM من أجل ضبط التوتر و التحكم بالاستطاعة الردية التي يقدمها أو يمتصها في العقدة المشتركة مع نظام القدرة بقابلية تحكم عالية. أنجز برنامج حاسوبي، تضمن وسائل التحكم في بارامترات نظام STATCOM أعطى خصائص تقارب عالية جدًا. تم التحقق من الخوارزمية المطورة و فعالية البرنامج المنجز من خلال تطبيقه على عدد من الأنظمة القياسية عرض منها ما تم على IEEE 5-bus system وأجريت اختبارات على شبكة النقل الكهربائية السورية 400 kV .
Keeping the voltage within the required limits is one of the key issues of operating a power system. since the voltage in electrical power system is affected significantly by changes of loads and equivalent circuit of the power system, there is a need to regulate the voltage with high control ability. Because of the growing use of FACTS in General and STATCOM among them in power systems to improve voltage stability, and because of the need for software that is not always available, the aim of research is to develop a mathematical model, algorithm and software for load flow analysis at the steady state of power system includes static synchronous compensator STATCOM. The Jacobian matrix in the Newton –Raphson algorithm, which is the relationship between voltage and power mismatches, is extended with the STATCOM variables to adjust the voltage and control of the reactive power witch is injected or absorbed at the point of common coupling, with high controlability. A Complete software has been developed that includes comprehensive control facilities and exhibits very strong convergence characteristics. A Sophisticated algorithm has been verified and the effectiveness of the program is tested by its application to a number of standard power systems including the IEEE 5-bus system, and Syrian transmission network 400 kV.
References used
KALYAN, K. S.; MEY, L. S. "Introduction to FACTS Controllers: Theory, Modeling, and Applications". John Wiley & Sons, 2009, 408
HINGORANI, N. G.; GYUGYI, L. "Understanding FACTS: Concepts and Technology of Flexible AC Transmission Systems". Wiley–IEEE Press: New York, 2000, 432
ZHANG, X. P.; REHTANZ, C.; PAL, B. "Flexible AC Transmission Systems: Modelling and Control". Springer Verlag: Berlin, Germany 2006, 383
AMBRIZ-PEREZ, H. "Advanced SVC Models for Newton-Raphson Load Flow and Newton Optimal Power Flow Studies". IEEE Trans. On Power Systems, vol.15, No.1, 2000, 129-136
WEEDY, B. M; CORY, B. J.; JENKINS, N.; EKANAYAKE,J. B.; STRBAC,G. "Electric Power Systems". 5th. ed., John Wiley & Sons, 2012, 512
rate research
Read More
with different frequency make Voltage Source Converter - HVDC link (VSC-HVDC links) an
attractive technology for most power transport in meshed grids. Advantages are the high
controllability of active and reactive power at the converter’s terminals
and the ability to increase the
stability of the surrounding AC system. VSC-HVDC can provide active and reactive control to achieve
maximum power transfer, system stability and improve power quality and reliability.
This research aims to develop a mathematical model and an algorithm for the analysis of power flow in
a steady state of power system containing VSC-HVDC.The Jacobian matrix inNewton-
Raphsonalgorithm, which is the relationship between voltage and power mismatches, is extended with
the VSC HVDC variablesto control active and reactive powers and voltage magnitude in any
combination. A Newton-Raphson load flow program has been developed which includes
comprehensive control facilities and exhibits very strong convergence characteristics. Two scenarios
have been studied, back-to-back VSC-HVDC link and full VSC-HVDC link connecting two buses in
AC networks. The algorithm and the program have been verified through a number of simulation
examples carried out on IEEE 14-bus System.
Unified Power Flow Controller (UPFC) plays a vital role in improving the power system
performance, both the static and dynamic, and enhanced the system loading capability by
rerouting the power flow in the network.
This paper presents control and
performance of UPFC intendedfor installation on the
transmission line to control power flow and improve voltage profile.
The paper begins with an introduction that describes the concept and
importance of power system security. The mathematical model is built
depending on both the linear load flow technique and the sensitivity
factors for line and generation outages.
The algorithm has been designed
so that a power system of arbitrary bus number and voltage levels can be
studied. This algorithm has been programmed in Borland Pascal in
interactive mode, and the developed program has been tested on several
test systems. The Program has been used for security assessment of a part
of the Syrian 230 kV network. The obtained results have shown the
validity and effectiveness of the program in spite of using linear models.
It is worth saying that the developed program is the first one for security
assessment in Syria so far.
Operating the electrical power systems at normal conditions is our goal always. This
is what represents the ideal state of electrical power system work. Hence, the electrical
power system work in case of insufficient electrical power requires avoid
ing since it leads
to big losses in national economy.
These losses could be huge when we talk about connection borders between systems
as per overload frame, because of lack of electrical power request. The impact of these
conditions could be noticeably decreased at a reasonable limit of electrical power request.
When we find out the optimal solution of electrical power systems operation and the
communication lines between them while considering the losses of consumers
disconnecting that guarantee the stability of loads. Finally, it is so at full use of maneuver
(available cases) spare power properties when applying the instant correction of regime.
This paper studies the basic approach to solve these issues which imply the reliability
definitions.
This research aims to achieve the observability of any electrical network by the
possibility compensation the lost measurements due to a defect, allowing the possibility of
state estimation of the electrical network ,ie, obtaining a single solution
for a state
estimation. This is done by means of the network observability analysing using the
available set of measurements and adding virtual pseudo-measurements if the network is
not observable. this is done using a numerical algorithm that ensures obtaining the
minimum and optimal number of added critical pseudo-measurements so that the result of
state estimation was not adversely affected. The algorithm depends on solving the
equation of the linear state estimation and the analysing to the triangular factors of the gain
matrix and an easy way to arrange the axis of the jacobian matrix ,ie, the measurements
matrix to ensure getting the minimum set of candidate pseudo- measurements to be added
to real measurements, the numerical algorithm was acheived by environment in the
MATLAB and tested to present the results on the network observabilty analysing and
adding the pseudo-measurements algorithm on state estimation .The results of the program
were tested on IEEE-14 network, and they showed that if a number of measurements were
lost, they would be compensated by critical and pseudo-measurements. The results of state
estimation showed small error ratio between estimated values using the real measurements
and the estimated values after added the critical pseudo-measurements.
Log in to be able to interact and post comments
comments
Fetching comments
Sign in to be able to follow your search criteria
