DC fault ride-through capability and STATCOM operation of a hybrid voltage source converter arrangement for HVDC power transmission and reactive power compensation

A strategy is presented for the self-tuning of a voltage source converter (VSC) based Flexible AC Transmission Systems (FACTS) according to the prevailing system condition. L-index, which is a power system voltage stability status indicator, and its associated parameters are used to automatically regulate the modulation signal of the VSC. This will lead to a proportionate adjusting of the magnitude of the current injected into, or absorbed from, the interconnected load bus by the FACTS device. This regulating scheme will enhance seamless and optimal reactive power compensation by utilizing the dynamic operational nature of present day distressed power system networks. Results obtained using this method when applied to selected load buses of the IEEE 14 bus system under varying practical scenarios showed its capability to appropriately control FACTS devices operation to accommodate system changing conditions. It is hoped that the outcome of this work will provide efficient tools for the determination of power system status, ensure optimal utilization of the dynamic reactive power compensation devices and reduce system outages.

Download Full-text

The Performance of the BTB-VSC for Active Power Balancing, Reactive Power Compensation and Current Harmonic Filtering in the Interconnected Systems

Energies ◽

10.3390/en13040831 ◽

2020 ◽

Vol 13 (4) ◽

pp. 831 ◽

Cited By ~ 1

Author(s):

Janeth Alcalá ◽

Víctor Cárdenas ◽

Alejandro Aganza ◽

Jorge Gudiño-Lau ◽

Saida Charre

Keyword(s):

Reactive Power ◽

Harmonic Distortion ◽

Reactive Power Compensation ◽

Active Power ◽

Performance Criteria ◽

Voltage Source ◽

Voltage Source Converter ◽

Current Harmonics ◽

Current Harmonic ◽

Harmonic Filtering

Nowadays, the use of power converters to control active and reactive power in AC–AC grid-connected systems has increased. With respect to indirect AC–AC converters, the tendency is to enable the back-to-back (BTB) voltage source converter (VSC) as an active power filter (APF) to compensate current harmonics. Most of the reported works use the BTB-VSC as an auxiliary topology that, combined with other topologies, is capable of active power regulation, reactive power compensation and current harmonic filtering. With the analysis presented in this work, the framework of the dynamics associated with the control loops is established and it is demonstrated that BTB-VSC can perform the three tasks for which, in the reviewed literature, at least two different topologies are reported. The proposed analysis works to support the performance criteria of the BTB-VSC when it executes the three control actions simultaneously and the total current harmonic distortion is reduced from 27.21% to 6.16% with the selected control strategy.

Download Full-text

Recent Advances of STATCOM in Power Transmission Lines – A Review

Turkish Journal of Computer and Mathematics Education (TURCOMAT) ◽

10.17762/turcomat.v12i3.1864 ◽

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

Download Full-text

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

International Journal of Engineering & Technology ◽

10.14419/ijet.v7i3.12.15868 ◽

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.

Download Full-text

Simulated Onshore-Fault Ride through of Offshore Wind Farms Connected through VSC HVDC

Wind Engineering ◽

10.1260/030952408784815781 ◽

2008 ◽

Vol 32 (2) ◽

pp. 103-113 ◽

Cited By ~ 23

Author(s):

A. Arulampalam ◽

G. Ramtharan ◽

N. Caliao ◽

J.B. Ekanayake ◽

N. Jenkins

Keyword(s):

Wind Farm ◽

Reactive Power ◽

Wind Farms ◽

Offshore Wind ◽

Voltage Source ◽

Voltage Source Converter ◽

Offshore Wind Farm ◽

Offshore Wind Farms ◽

Grid Connection ◽

Fault Ride Through

Effective Onshore-Fault Ride Through was demonstrated by simulation for a Fixed Speed Induction Generator (FSIG) offshore wind farm connected through a Voltage Source Converter HVDC link. When a terrestrial grid fault occurs, power through the onshore converter reduces and the DC link voltage increases. A control system was then used to block the offshore converter. The offshore AC network voltage was reduced to achieve rapid power rejection. Reactive power at the onshore converter was controlled to support the AC network voltage according to the GB Grid Code requirements. Two cases, a 200 ms terrestrial fault and a 50% retained voltage fault of duration 710 ms, at the grid connection point were studied. The simulation results show that power blocking at the offshore converter was effective and the DC link voltage was controlled.

Download Full-text

Distribution system power quality compensation using a HSeAPF based on SRF and SMC features

International Journal of Systems Assurance Engineering and Management ◽

10.1007/s13198-021-01185-w ◽

2021 ◽

Author(s):

Akram Qashou ◽

Sufian Yousef ◽

Abdallah A. Smadi ◽

Amani A. AlOmari

Keyword(s):

Power Distribution ◽

Distribution System ◽

Reactive Power ◽

Sliding Mode ◽

Distribution Network ◽

Harmonic Distortion ◽

Phase Locked Loop ◽

Voltage Source ◽

Voltage Source Converter ◽

Non Linear

AbstractThe purpose of this paper is to describe the design of a Hybrid Series Active Power Filter (HSeAPF) system to improve the quality of power on three-phase power distribution grids. The system controls are comprise of Pulse Width Modulation (PWM) based on the Synchronous Reference Frame (SRF) theory, and supported by Phase Locked Loop (PLL) for generating the switching pulses to control a Voltage Source Converter (VSC). The DC link voltage is controlled by Non-Linear Sliding Mode Control (SMC) for faster response and to ensure that it is maintained at a constant value. When this voltage is compared with Proportional Integral (PI), then the improvements made can be shown. The function of HSeAPF control is to eliminate voltage fluctuations, voltage swell/sag, and prevent voltage/current harmonics are produced by both non-linear loads and small inverters connected to the distribution network. A digital Phase Locked Loop that generates frequencies and an oscillating phase-locked output signal controls the voltage. The results from the simulation indicate that the HSeAPF can effectively suppress the dynamic and harmonic reactive power compensation system. Also, the distribution network has a low Total Harmonic Distortion (< 5%), demonstrating that the designed system is efficient, which is an essential requirement when it comes to the IEEE-519 and IEC 61,000–3-6 standards.

Download Full-text