Direct active and reactive power control of single-phase grid-tie converters

Monfared, Mohammad; Sanatkar, Majid; Golestan, Saeed

doi:10.1049/iet-pel.2012.0131

Cited by 101 publications

(86 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Meanwhile, there have been attempts to eliminate some of these sensors in power electronics converters [19][20][21][22][23]. These studies pursue to reduce the system complexity in PWM rectifiers or inverters, while still retaining the system performance and reliability.…”

Section: Introductionmentioning

confidence: 99%

“…These studies pursue to reduce the system complexity in PWM rectifiers or inverters, while still retaining the system performance and reliability. To allow the grid voltage sensorless operation in single-phase grid connected converters, the voltage estimation scheme based on the measured currents and converter parameters has been proposed [20]. The voltage estimation from the estimated instantaneous active and reactive powers has been studied for PWM converters [21].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Voltage-Sensorless Control Scheme for a Grid Connected Inverter Using Disturbance Observer

Kim

2017

Energies

View full text Add to dashboard Cite

A grid connected inverter usually requires voltage and current measurements to control the active and reactive powers as well as the inverter output currents. While voltage sensors are essential to obtain reliable information on the phase angle, these additional components certainly increase the production costs and complexity. In this paper, a voltage-sensorless control scheme for a grid connected inverter using a disturbance observer (DOB) is presented. The grid voltages are estimated by DOB in the stationary reference frame using the current measurements and reference signals. Even though the DOB estimates the grid voltages with reasonable accuracy in the presence of the uncertainty such as the unbalanced condition and harmonic distortion, the resultant waveform shows a phase lag depending on the estimation bandwidth. To overcome this limitation, a phase lead compensation is introduced. By using these techniques, the phase angle of grid voltages can be completely restored even if the phase angle of grid is initially unknown. The proposed scheme is simple and straightforward. In addition, it does not require any additional hardware. The feasibility of the proposed voltage-sensorless control scheme is demonstrated through simulations and experiments using 2 kVA prototype inverter.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Voltage-Sensorless Control Scheme for a Grid Connected Inverter Using Disturbance Observer

Kim

2017

Energies

View full text Add to dashboard Cite

show abstract

“…It is a grid voltage phase detection structure which requires orthogonal voltages. In single-phase PLL, accurate and fast phase estimation can be obtained by processing a signal in phase with the grid voltage (original signal) and another one which is 90 • phase shifted from it [19,20]. The PLL, which generates orthogonal signals by delaying the original signal, is called a transport-delay PLL (TDPLL) [21].…”

Section: Introductionmentioning

confidence: 99%

A single phase photovoltaic inverter control for grid connected system

Panda

Pathak

Srivastava

2016

Sadhana

View full text Add to dashboard Cite

This paper presents a control scheme for single phase grid connected photovoltaic (PV) system operating under both grid connected and isolated grid mode. The control techniques include voltage and current control of grid-tie PV inverter. During grid connected mode, grid controls the amplitude and frequency of the PV inverter output voltage, and the inverter operates in a current controlled mode. The current controller for grid connected mode fulfills two requirements -namely, (i) during light load condition the excess energy generated from the PV inverter is fed to the grid and (ii) during an overload condition or in case of unfavorable atmospheric conditions the load demand is met by both PV inverter and the grid. In order to synchronize the PV inverter with the grid a dual transport delay based phase locked loop (PLL) is used. On the other hand, during isolated grid operation the PV inverter operates in voltage-controlled mode to maintain a constant amplitude and frequency of the voltage across the load. For the optimum use of the PV module, a modified P&O based maximum power point tracking (MPPT) controller is used which enables the maximum power extraction under varying irradiation and temperature conditions. The validity of the proposed system is verified through simulation as well as hardware implementation.

show abstract

“…A single-phase VSI is the most suitable solution for connecting a low power RES to the single phase grid. To regulate the power exchange with the grid, and at the same time, reduce harmonic components in the alternating current (AC) side current, various control strategies have been proposed, such as proportional integrator (PI) controller and proportional resonant (PR) controller [3]. The control system for the inverter consists of the synchronization controller which is a phase locked loop (PLL) that constantly tracks the phase of the grid voltage [4].…”

Section: Introductionmentioning

confidence: 99%

Grid Tied Fuel Cell System Using Single Phase PLL Based SOGI with PI and PR Current Controllers

Meral¹,

Çelík²

2016

ujeee

View full text Add to dashboard Cite

Renewable energy sources (RES) like the solar and wind can't produce energy all the time due to depending air condition. But Fuel Cells (FCs) can be stored until it's needed. Power electronics plays an important role in converting the input power which is suitable delivered to the utility grid. Voltage source inverter (VSI) is the most widely used solution for connecting a low power RES tied the grid. This paper present grid tied fuel cell system using single phase phase-locked loop (PLL) based second order generalized integrator (SOGI) with proportional integral (PI) and proportional resonant (PR) current/power controllers. The SOGI algorithm is used with PLL in order to synchronize grid phase and amplitude. Solid oxide fuel cell (SOFC) which is one of FC types is analysed under constant and various DC load. Controllers of the PI and PR are discussed in order to obtain the control of inverter along with the variation of active power and grid voltage drop. The system is modelled and simulated using PSCAD/EMTDC software package. Simulation results show the effectiveness of both the controllers and PLL technique based SOGI for the synchronising of the SOFC systems with the single phase grid successfully.

show abstract

Direct active and reactive power control of single-phase grid-tie converters

Cited by 101 publications

References 14 publications

Voltage-Sensorless Control Scheme for a Grid Connected Inverter Using Disturbance Observer

Voltage-Sensorless Control Scheme for a Grid Connected Inverter Using Disturbance Observer

A single phase photovoltaic inverter control for grid connected system

Grid Tied Fuel Cell System Using Single Phase PLL Based SOGI with PI and PR Current Controllers

Contact Info

Product

Resources

About