Inclusion of a high voltage DC-voltage source converter model in a Newton–Raphson power flow algorithm

2003 ◽  
Vol 150 (6) ◽  
pp. 691 ◽  
Author(s):  
C. Angeles-Camacho ◽  
O.L. Tortelli ◽  
E. Acha ◽  
C.R. Fuerte-Esquivel
Keyword(s):  
High Voltage ◽  
Power Flow ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Dc Voltage ◽  
Flow Algorithm ◽  
Newton Raphson

Research on DC Voltage Control Strategies for Typical Four-Terminal HVDC System

2014 ◽  
Vol 521 ◽  
pp. 222-228
Author(s):  
Kai Wang ◽  
Hai Shun Sun ◽  
Yu Hua ◽  
Yuan Liu ◽  
Wei Xing Lin ◽  
...  
Keyword(s):  
High Voltage ◽  
Direct Current ◽  
Control Strategy ◽  
Alternative Energy ◽  
Control Strategies ◽  
Future Trend ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Dc Voltage ◽  
High Voltage Direct Current

The continuous development of alternative energy has put forward higher requirement for electricity transmission. To cope with its fluctuation characteristics, high voltage direct current (HVDC) technology has received more attention. Voltage Source Converter (VSC) based Multi-Terminal High Voltage Direct Current (MTDC) represents the future trend of HVDC technology. This paper mainly focuses on the control strategies of a four-terminal VSC based MTDC power transmission system. The operation characteristic of the system was studied, and the proposed two control strategies, master-slave control strategy and DC voltage droop control strategy, were verified through simulations. The latter control strategy was proved to be performing well under various conditions, including converter station disconnection and faults at AC side of the converter.

scholarly journals Universal Power Flow Algorithm for Bipolar Multi-Terminal VSC-HVDC

Energies ◽  
2020 ◽  
Vol 13 (5) ◽  
pp. 1053
Author(s):  
Zhou Li ◽  
Yan He ◽  
Ting-Quan Zhang ◽  
Xiao-Ping Zhang
Keyword(s):  
Steady State ◽  
Power Flow ◽  
Control Strategies ◽  
Short Circuit ◽  
Operating Conditions ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Detailed Calculation ◽  
Negative Pole ◽  
Flow Algorithm

An effective and accurate power flow algorithm provides control references for active power dispatch and initial steady state operating points, used for stability analysis, short-circuit calculations, and electromagnetic transient simulations, which is not only a fundamental precondition to analyze the system operating conditions, but also the basis to improve the accuracy of power flow and DC voltage control of the multi-terminal voltage source converter-based high voltage direct current (VSC-HVDC). This paper proposes a nodal voltage-based universal steady-state power flow algorithm for the newly-developed bipolar multi-terminal VSC-HVDC (VSC-MTDC). Firstly, as the positive-pole and negative-pole DC network of the bipolar VSC-MTDC can be operated individually, a bipolar power flow alternating iterative method is proposed here to obtain the positive/negative-pole DC network power flow. Secondly, a series of nodal equivalent methods involving various control strategies are proposed for the universal power flow algorithm. Then the detailed calculation procedure and a general MATLAB(TM) program for the universal power flow algorithm is presented. A typical 4-terminal bipolar VSC-MTDC system was built in the PSCAD/EMTDC to verify the validity of the proposed algorithm, and the results are discussed here. Moreover, the calculation results of more complex bipolar VSC-MTDC systems under different operating conditions, employing the proposed universal power flow algorithm, are presented to illustrate its universality and efficiency.

Voltage Source Converter Based High-voltage DC System Modeling for Optimal Power Flow Studies

2012 ◽  
Vol 40 (3) ◽  
pp. 312-320 ◽  
Author(s):  
Alejandro Pizano-Martínez ◽  
Claudio R. Fuerte-Esquivel ◽  
César Angeles-Camacho
Keyword(s):  
High Voltage ◽  
Power Flow ◽  
Optimal Power Flow ◽  
System Modeling ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Dc System ◽  
Optimal Power

Improved Power Flow Algorithm Incorporating Multi-Terminal VSC-HVDC

2011 ◽  
Vol 383-390 ◽  
pp. 2188-2194 ◽  
Author(s):  
Fang Ye ◽  
Zhi Nong Wei ◽  
Guo Qiang Sun
Keyword(s):  
Steady State ◽  
Power Flow ◽  
Power Transmission ◽  
Conventional Technique ◽  
Test System ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Mathematical Form ◽  
Flow Algorithm ◽  
Set Up

Voltage Source Converter (VSC) based High Voltage Direct Current (HVDC) technology is a newly deve- loped power transmission technology. The basic principle and structure of multi-terminal VSC-HVDC is introduced and its steady-state mathematical model is set up. An improved power flow algorithm is deduced, which not only decouple the relationship between AC and DC systems’ variables in the strict mathematical form, but also can be integrated with the conventional power flow program and exhibit good accuracy and convergence characteristics compared to conventional technique. A numerical example of IEEE 14-bus test system with a 3-terminal VSC-HVDC network is given. The results show that the proposed steady-state model of multi-terminal VSC-HVDC and corresponding power flow algorithm are correct and effective.

scholarly journals Coordinated Control System between Grid–VSC and a DC Microgrid with Hybrid Energy Storage System

Electronics ◽  
2021 ◽  
Vol 10 (21) ◽  
pp. 2699
Author(s):  
Miguel Montilla-DJesus ◽  
Édinson Franco-Mejía ◽  
Edwin Rivas Trujillo ◽  
José Luis Rodriguez-Amenedo ◽  
Santiago Arnaltes
Keyword(s):  
Control Strategy ◽  
Power Flow ◽  
Storage System ◽  
Coordinated Control ◽  
Energy Storage System ◽  
Voltage Regulation ◽  
Electrical Network ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Dc Microgrid

Direct current microgrids (DCMGs) are currently presented as an alternative solution for small systems that feed sensitive electrical loads into DC. According to the scientific literature, DCMG maintains good voltage regulation. However, when the system is in islanded mode, very pronounced voltage variations are presented, compromising the system’s ability to achieve reliable and stable energy management. Therefore, the authors propose a solution, connecting the electrical network through a grid-tied voltage source converter (GVSC) in order to reduce voltage variations. A coordinated control strategy between the DCMG and GVSC is proposed to regulate the DC voltage and find a stable power flow between the various active elements, which feed the load. The results show that the control strategy between the GVSC and DCMG, when tested under different disturbances, improves the performance of the system, making it more reliable and stable. Furthermore, the GVSC supports the AC voltage at the point of common coupling (PCC) without reducing the operating capacity of the DCMG and without exceeding even its most restrictive limit. All simulations were carried out in MATLAB 2020.

scholarly journals Improvement of Power Quality Considering Voltage Stability in Grid Connected System by FACTS Devices

2013 ◽  
pp. 182-187
Author(s):  
Sarika D. Patil
Keyword(s):  
Power Generation ◽  
Wind Power ◽  
Power Flow ◽  
Voltage Stability ◽  
Low Voltage ◽  
Wind Power Generation ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Induction Generators ◽  
Facts Devices

Recently the wind power generation has attracted special interest and many wind power stations are being in service in the world. In the wind turbine that mostly uses induction generators, tend to drain large amounts of Vars from the grid, potentially causing low voltage and may be voltage stability problems for the utility owner, especially in the case of large load variation on distribution feeder. Voltage-source converter based various FACTS devices have been used for flexible power flow control, secure loading and damping of power system oscillations. Some of those are used also to improve transient and dynamic stability of the wind power generation (WPGS).

scholarly journals Current injection-based Newton–Raphson power-flow algorithm for droop-based islanded microgrids

2019 ◽  
Vol 13 (23) ◽  
pp. 5271-5283 ◽  
Author(s):  
Abhishek Kumar ◽  
Bablesh Kumar Jha ◽  
Devender Singh ◽  
Rakesh Kumar Misra
Keyword(s):  
Power Flow ◽  
Current Injection ◽  
Flow Algorithm ◽  
Newton Raphson
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