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.

scholarly journals Robust optmized control of multi levels STATCOM

2019 ◽  
Vol 16 (3) ◽  
pp. 1203
Author(s):  
Tedjini Hamza ◽  
Messaoud Fatima Zahra ◽  
Kadri Boufeldja
Keyword(s):  
Power Flow ◽  
Ant Colony Algorithm ◽  
Reactive Power ◽  
Voltage Source ◽  
Static Synchronous Compensator ◽  
Multilevel Converters ◽  
Dc Voltage ◽  
Reactive Power Flow ◽  
Ac Power ◽  
Lyapunov’S Theorem

<p>Reactive power compensation is an essential part of a power system and the static synchronous compensator (STATCOM) plays an important role in controlling the reactive power flow over the transmission line. The basic building block of the STATCOM is a voltage source inverter (VSI) that generates a synchronous sinusoidal voltage and because of the high MVA ratings, it would be expensive to provide independent, equal, regulated dc voltage sources to power the multilevel converters which are presently proposed for STATCOMs. Dc voltage sources can be derived from the dc link capacitances which are charged by the rectified ac power. In this paper a new stronger control combined of nonlinear control based Lyapunov’s theorem and Ant Colony Algorithm (ACA) to maintain stability of multilevel STATCOM and the utility.</p>

scholarly journals An Active/Reactive Power Control Strategy for Renewable Generation Systems

Electronics ◽  
2021 ◽  
Vol 10 (9) ◽  
pp. 1061
Author(s):  
Iván Andrade ◽  
Rubén Pena ◽  
Ramón Blasco-Gimenez ◽  
Javier Riedemann ◽  
Werner Jara ◽  
...  
Keyword(s):  
Control Strategy ◽  
Power Flow ◽  
Reactive Power ◽  
Control Strategies ◽  
Voltage Source ◽  
Renewable Generation ◽  
Frequency Reference ◽  
Active And Reactive Power ◽  
Reactive Power Flow ◽  
Islanded Mode

The development of distributed generation, mainly based on renewable energies, requires the design of control strategies to allow the regulation of electrical variables, such as power, voltage (V), and frequency (f), and the coordination of multiple generation units in microgrids or islanded systems. This paper presents a strategy to control the active and reactive power flow in the Point of Common Connection (PCC) of a renewable generation system operating in islanded mode. Voltage Source Converters (VSCs) are connected between individual generation units and the PCC to control the voltage and frequency. The voltage and frequency reference values are obtained from the P–V and Q–f droop characteristics curves, where P and Q are the active and reactive power supplied to the load, respectively. Proportional–Integral (PI) controllers process the voltage and frequency errors and set the reference currents (in the dq frame) to be imposed by each VSC. Simulation results considering high-power solar and wind generation systems are presented to validate the proposed control strategy.

scholarly journals Impact of Changes in a Distribution Network Nature on the Capacitive Reactive Power Flow into the Transmission Network in Slovakia

Energies ◽  
2021 ◽  
Vol 14 (17) ◽  
pp. 5321
Author(s):  
Matej Tazky ◽  
Michal Regula ◽  
Alena Otcenasova
Keyword(s):  
Power Flow ◽  
Reactive Power ◽  
Power Transmission ◽  
Low Voltage ◽  
Point Of View ◽  
Electricity System ◽  
Reactive Power Flow ◽  
Main Emphasis ◽  
The Impact ◽  
Lower Voltage

The main emphasis in the operation of an electricity system is placed on its safe and reliable operation. The flow of reactive power in a network can affect voltage conditions in individual nodes of the transmission system. In recent years, there have been changes in the network that have resulted in increased capacitive reactive power flows from lower voltage levels to higher ones. These flows can cause the voltage to rise above the limit. This paper examines recent changes in the reactive power transmission in the network, especially at lower voltage levels. The possible impact of these changes on the flow of capacitive reactive power at higher voltage levels is analyzed. This paper also presents a description and the simulated impact of power lines at different voltage levels on reactive power flows. Real measurements of different types of consumers at the low-voltage (LV) level are analyzed. Finally, a simulation model was created to simulate the impact of a customer’s power contribution to the reactive power flows from the point of view of a 110 kV voltage node. This node is characterized as a supply point.

Three-phase series-connected photovoltaic generator for harmonic and reactive power compensation with battery energy storage device

2016 ◽  
Vol 39 (7) ◽  
pp. 1071-1080
Author(s):  
Maheswar P Behera ◽  
Pravat K Ray
Keyword(s):  
Energy Storage ◽  
Reactive Power ◽  
Voltage Source ◽  
Storage Device ◽  
Voltage Source Converter ◽  
Radiation Level ◽  
Battery Energy Storage ◽  
Three Phase ◽  
Dc Bus ◽  
Battery Energy

This paper presents a photovoltaic (PV) generator along with a battery energy storage system connected in series with a three-phase grid. The objective of the proposed system is to provide uninterruptable compensation to the series-connected grid and non-linear load during strong sunlight as well as at night or in cloudy conditions. The interface between the grid and the PV is carried out through a voltage source converter (VSC), eliminating both the current and voltage harmonics and compensating the reactive power. The DC voltage control of the DC bus capacitor is employed in order to maintain unity power factor operation of the system, irrespective of changes in solar radiation level or due to change in load. Another control scheme is implemented to charge and discharge the connected battery whenever the sun goes out, to meet the DC bus voltage requirement of the VSC through a bidirectional DC-DC converter.

scholarly journals A Review on Flexible and Transparent Energy Storage System

Materials ◽  
2018 ◽  
Vol 11 (11) ◽  
pp. 2280 ◽  
Author(s):  
Jie Li ◽  
Qianqian Jiang ◽  
Nannan Yuan ◽  
Jianguo Tang
Keyword(s):  
Energy Storage ◽  
Carbon Nanomaterials ◽  
Electronic Device ◽  
Storage System ◽  
Electronic Devices ◽  
Lithium Ion ◽  
Energy Storage System ◽  
Storage Device ◽  
Energy Storage Device ◽  
Super Capacitor

Due to the broad application prospect, flexible and transparent electronic device has been widely used in portable wearable devices, energy storage smart window and other fields, which owns many advantages such as portable, foldable, small-quality, low-cost, good transparency, high performance and so on. All these electronic devices are inseparable from the support of energy storage device. Energy storage device, like lithium-ion battery and super capacitor, also require strict flexibility and transparency as the energy supply equipment of electronic devices. Here, we demonstrate the development and applications of flexible and transparent lithium-ion battery and super capacitor. In particular, carbon nanomaterials are widely used in flexible and transparent electronic device, due to their excellent optical and electrical properties and good mechanical properties. For example, carbon nanotubes with high electrical conductivity and low density have been widely reported by researchers. Otherwise, graphene as an emerging two-dimensional material with electrical conductivity and carrier mobility attracts comparatively more attention than that of other carbon nanomaterials. Substantial effort has been put on the research for graphene-based energy storage system by researchers from all over the world. But, there is still a long way to accomplish this goal of improving the performance for stretchable and transparent electronic device due to the existing technical conditions.

scholarly journals Emulated reactance and resistance by a SSSC incorporating energy storage device

2019 ◽  
Vol 9 (2) ◽  
pp. 840
Author(s):  
H. V. Gururaja Rao ◽  
Nagesh Prabhu ◽  
R. C. Mala
Keyword(s):  
Energy Storage ◽  
Reactive Power ◽  
Control Strategies ◽  
Storage Device ◽  
Energy Storage Device ◽  
Distance Protection ◽  
Detailed Model ◽  
Steady State Condition ◽  
Operating Range ◽  
Transient System

<p>Static Synchronous series compensator without energy storage device can exchange only reactive power with the network and can operate in limited operating range in two quadrants only. When energy storage device is connected at the DC bus of SSSC (SSSC – ES), it can also exchange real power with the network. Operating range of SSSC will be much broader and it covers all the four quadrants. However, emulated reactance and resistance by SSSC – ES is likely to affect the performance of a distance protection system. This paper presents a detailed model of an SMIB system with SSSC – ES. Injected voltage by SSSC – ES in all the four quadrants of operation is presented. Impact of operation of SSSC _ ES in different quadrants and various control strategies for SSSC – ES on impedance emulated by SSSC – ES during steady state condition and transient system disturbance is discussed. </p>

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