Voltage Source Converter (VSC) HVDC for bulk power transmission - technology and planning method

2010 ◽  
Author(s):  
D. Westermann ◽  
D. Van Hertem ◽  
A. Küster ◽  
R. Atmuri ◽  
B. Klöckl ◽  
...  
Keyword(s):  
Power Transmission ◽  
Planning Method ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Bulk Power

scholarly journals Recent Advances of STATCOM in Power Transmission Lines – A Review

2021 ◽  
Vol 12 (3) ◽  
pp. 4621-4626
Author(s):  
Mr. L NarayanaGadupudi Et.al
Keyword(s):  
Transmission Lines ◽  
Reactive Power ◽  
Power Transmission ◽  
Frequency Control ◽  
Harmonic Distortion ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Switching Frequency ◽  
Power Transmission Lines ◽  
Switching Losses

 Internal Liability of power system transmission lines influenced by the turbulences owing to catastrophic disasters. In order to achieve Constant Voltage Stability at both ends of the transmission lines, Static Synchronous Compensator (STATCOM) is imperative.  Voltage source Converter mechanisms augment with switching frequency control methodologies are widely adopted to regulate the reactive power. By deliberating IEEE Standards, the minimization of Total Harmonic Distortion (THD) is conceivable with STATCOM. This paper depicts the advancement of VSC based STATCOM approaches and the methodologies to minimize the switching losses. Economical management of High-Power ratings systems is also discussed in this paper

Non-Grid-Connected Wind Power DC Network Study Based on Hybrid Convertor

2012 ◽  
Vol 546-547 ◽  
pp. 295-300
Author(s):  
Hui Fang Liu
Keyword(s):  
Wind Power ◽  
High Efficiency ◽  
Power Transmission ◽  
Current Source ◽  
High Energy ◽  
Voltage Source ◽  
Storage Device ◽  
Voltage Source Converter ◽  
Power Fluctuation ◽  
Super Capacitor

Applying non-grid-connected wind power to high energy consuming industry has broad development prospects. This paper presents a compound DC power transmission net to realize high efficiency and reduce the loss. This net consists of current source converter (CSC) based on naturally commutated thyristor and voltage source converter (VSC) based on IGBT. Super capacitor connected to the load side stabilizes the wind power fluctuation. The coordinated control strategy of wind power, energy storage device and load is provided. Simulation results based on real wind power shows the validity of the system.

scholarly journals An Improved Phase-Locked-Loop Control with Alternative Damping Factors for VSC Connected to Weak AC System

2016 ◽  
Vol 2016 ◽  
pp. 1-13 ◽  
Author(s):  
Bin Yuan ◽  
Jianzhong Xu ◽  
Chengyong Zhao ◽  
Yijia Yuan
Keyword(s):  
Power Transmission ◽  
Negative Impact ◽  
Phase Locked Loop ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Power Transfer ◽  
Small Signal Stability ◽  
Loop Control ◽  
Optimal Damping ◽  
Weak Ac System

The gains of phase-locked-loop (PLL) have significant impacts on the power transfer limits for the voltage source converter (VSC) connected to weak AC system. Therefore, in this paper, an improved PLL control, respectively, with alternative damping factors for rectifier and inverter is proposed. First, it is proved that the impedance angle of AC system has a great impact on the small-signal stability of the VSC system. With the same variation tendency of Thévenin equivalent resistance, the limits of power transmission are changing in opposite trends for rectifier and inverter. Second, the improved PLL with alternative damping factors is proposed based on the participation factor analysis. Third, the optimal damping factors of the improved PLL control for rectifier and inverter are calculated. Simulations and calculations validated the following three conclusions: (1) in rectifying operation, the equivalent system resistance has a negative impact on the stability of the system and this is not the case for inverting operation; (2) adding the alternative damping factors to PLL control shows similar results compared with changing the impedance angle of AC system; (3) the proposed optimal damping factors of PLL can effectively extend the power transfer limits under both rectifier and inverter modes.

scholarly journals The Possibility of Enhanced Power Transfer in a Multi-Terminal Power System through Simultaneous AC–DC Power Transmission

Electronics ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 108
Author(s):  
Shaista Parveen ◽  
Salman Hameed ◽  
Hafizur Rahman ◽  
Khaliqur Rahman ◽  
Mohd Tariq ◽  
...  
Keyword(s):  
Power System ◽  
Power Transmission ◽  
Transmission System ◽  
Simulation Software ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Transmission Network ◽  
Power Transfer ◽  
Dc Power ◽  
Dc Power Transmission

The feasibility of power transfer enhancement, through simultaneous AC–DC power transmission in a two-terminal transmission network, has been proposed earlier by the authors, and the concept is well established. To meet the increase in demand for electricity, a new technique is proposed in this article to increase the use of existing transmission lines in addition to independent control of AC and DC power flow. This paper extends the concept to a three-terminal transmission network by considering a power tapping from the middle of the line. DC is also superimposed in the already existing three-terminal AC transmission system. In the proposed topology, a multi-terminal simultaneous AC–DC system is used, which is integrated with a zig-zag transformer and more than two voltage source converter (VSC) stations. Each terminal may represent an area of the power system. Anyone/two-terminal(s) may act as sending end, whereas the remaining two/one terminal(s) may act as receiving end. Power can flow in either direction through each segment of the transmission system. At sending end, VSC converts a part of AC to DC and injects it into the neutral of the zig-zag transformer. On receiving terminal, DC power is tapped from neutral of zig-zag transformer and fed to VSC for conversion back to AC. The concept is verified in the digital simulation software PSCAD/EMTDC.

scholarly journals Simultaneous Placements of TCSC and VSCDG for Congestion Management

2020 ◽  
Vol 9 (5) ◽  
pp. 80-86
Keyword(s):  
Transmission Lines ◽  
Power Transmission ◽  
Optimal Solution ◽  
Congestion Management ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Second Stage ◽  
Power Transmission Systems ◽  
Genetic Algorithm Method ◽  
Congested Systems

Relieving congestion is a major technical issue in power transmission systems. In this paper, simultaneous placement of Thyristor controlled series capacitors (TCSC) and Voltage source converter based distribution generators (VSC-DG) are used for relieving congestion, minimize system cost and maintain the system in secure state. The system has been analyzed in three stages: (i) first stage, the congestions are made in different transmission network by overload and line outages, (ii) second stage, relieving congestion of transmission lines by using TCSC and VSCDG, where these devices are placed simultaneously at their optimal locations, (iii) comparative cost analysis is done between normal and congested systems. The proposed approach is tested on the 62-bus Indian power system network. The optimal solution of the test systems are obtained by genetic algorithm method and its solutions are compared with primal linear programming. All the results are validated through Power World Simulator and GA toolbox in MATLAB.

scholarly journals Optimal coordinated control of hybrid AC/VSC-HVDC system integrated with DFIG via cooperative beetle antennae search algorithm

PLoS ONE ◽  
2020 ◽  
Vol 15 (11) ◽  
pp. e0242316 ◽  
Author(s):  
Junfang Hao ◽  
Jinhai Huang ◽  
Ailing Zhang ◽  
Hongjie Ai ◽  
Qun Zhang ◽  
...  
Keyword(s):  
Power Transmission ◽  
Heuristic Algorithms ◽  
Search Algorithm ◽  
Fitness Function ◽  
Dynamic Balance ◽  
Coordinated Control ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Hvdc System ◽  
Doubly Fed

Nowadays, with the significant integration of various renewable energy, hybrid alternating current/ voltage source converter based high voltage direct current (AC/VSC-HVDC) system integrated with doubly-fed induction generator (DFIG) has achieved rapidly development in smart grid. A proper control system design for hybrid AC/VSC-HVDC system plays a very crucial role for a reliable and effective power transmission. Hence, this paper designs a novel cooperative beetle antenna search (CBAS) algorithm for optimal coordinated control of hybrid AC/VSC-HVDC system integrated with DFIG. Compared with original beetle antennae search (BAS) algorithm, CBAS algorithm can significantly improve searching efficiency via an efficient cooperation with a group of multiple beetles instead of a single beetle. Particularly, CBAS algorithm can effectively escape from local optimums thanks to its dynamic balance mechanism, which can maintain appropriate trade-off between global exploration and local exploitation. Moreover, three case studies are undertaken to validate the effectiveness and superiorities and effectiveness of CBAS algorithm compared against that of other traditional meta-heuristic algorithms. Especially, the average results of fitness function acquired by CBAS algorithm is merely 46.05%, 41.18%, and 47.82% of that of PSO, GA, and BAS algorithm, respectively.

scholarly journals Controlling of PV-STATCOM for Increasing Power Transmission based on VHDL Signal Generation

2018 ◽  
Vol 7 (3.12) ◽  
pp. 84
Author(s):  
B Pragathi ◽  
M Suman
Keyword(s):  
Power Distribution ◽  
Reactive Power ◽  
Power Transmission ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Night Time ◽  
Solar Module ◽  
Vlsi Technology ◽  
Distribution Of Power ◽  
Novel Concept

Along with Generation of power, distribution of power is equally important.The power produced by the solar farm are utilized only during daytime, the solar farm remain idle during night and operate below capacity in initial morning and late afternoon. A grid connected solar farm uses photovoltaic (PV) arrays for generation of DC power which is transformed to AC using inverter modeling. A FACTS family device STATCOM is centered on a voltage source converter which operates as a rectifier and an inverter is used to enhance steady power transmission limits with reactive power, voltage and damping control. A majorsection of the STATCOM is a voltage source converter which is also anessential element of PV solar module. A novel concept was proposed by which PV solar module can be operated as a STATCOM, known as PV-STATCOM in the night-time and day time. VLSI technology is used to generate the trigger pulses for three phase inverter using the VHDL programming language to generate the signal for the control of inverter section in STATCOM. The HDL compiling and FPGA implementation is done using MATLAB/SIMULINK.  

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