The switching states and the corresponding voltage vector values of pwm inverter gridconnected in twophase stationary coordinate are shown in table 1, where s a, s b and s c represents the switching status of phase a, b, c, respectively and s k 1 represents the upper switch in phase k turning on and the under switch turning off, s k 0 denotes the upper switch in phase k turning off. A new control approach based on proportional resonant control for grid connected current is presented in this paper. Simulation and analysis of llc resonant converter using. This paper proposes a proportional resonant pr controller together with the adaptive space vector modulation asvm technique for the more electric aircraft mea startergenerator neutralpoint clamped npc converter. Ucc24624 data sheet, product information and support.
Ac micro grid with proportional resonant pr controller. An improved proportional quasiresonant control of wind power. Digital resonant current controllers for voltage source. A proportionalresonant pr controller is used to control the inverter current. Ghoshal, anirban and john, vinod 2010 antiwindup schemes for proportional integral and proportional resonant controller. The dc characteristic of llc resonant converter could be divided into zvs region and zcs region. Stability of gridconnected inverter with lcl filter. For more details, see the application note understanding and using llc converters to great advantage. Mar 19, 2015 proportionalonly control is the simplest of the pid controller forms as it is limited to a single tuning parameter controller gain k c. Analysis and suppression of torsional vibrations in variable.
Figure 2 nonideal proportional resonant 5rd harmonic compensator controller bode diagram the 7th harmonic compensator at a resonant frequency 7. The analysis and implementation of proportional resonant. It is also possible in some cases to improve the transient response since the damping ratio is proportional to the phase margin, and the response rise time is inversely proportional to the system bandwidth. Design of pr current control with selective harmonic. The application research of proportional resonance. Proportional resonant pr controller are gaining popularity for their advantages over pi controller particularly for control of grid connected inverters 6, 7. In this thesis, a comprehensive theoretical and experimental comparison between the pi and pr controllers is presented. In 8, a strategy of proportional integral pi regulator paralleled with a harmonic resonant r controller is introduced in the. Proportional integral plus multifrequency resonant current. When using the pi controller, the sinusoidal axes would be a problem. Based on the above a robust multiresonant pr regulator for threephase gridconnected vsi using direct pole placement design strategy bin li, ming zhang, long huang. Because a narrower proportional band gives greater output change for any given. The application research of proportional resonance control in. It is a doubleended controller specific to seriesresonant half bridge topology.
Proportionalresonant controlled npc converter for more. Tutorial implementation and design of pll and enhanced. This controller is different from traditional pi control, pr control can introduce the infinite gain at the. Proportionalintegrator pi and proportionalresonant pr are the two most widely used current controller 1618. Aalborg universitet analysis, design and implementation of a. Proportional resonant controller with resonant harmonic. A proportional resonant pr controller is used for replacing the conventional. Therefore, those control strategies are inadequate for tackling voltage sags and distortions. Proportionalonly control is the simplest of the pid controller forms as it is limited to a single tuning parameter controller gain k c. The values listed can be used to determine the energy loss of the hydraulic system by using the equation. Grid synchronization of wind turbine converters under transient grid faults using a double synchronous reference frame pll j. Design and control of proportionalresonant controller based photovoltaic power conditioning system conference paper pdf available october 2009 with 7,500 reads how we measure reads. The proportional p current controller was used to derive the voltage reference in cgci 12. An improved proportional quasiresonant control of wind.
This paper presents a current control technique for a singlephase gridconnected dcac inverter which is used in photovoltaic power conditioning system pv pcs. It consists of a pv, a proton exchange membrane fuel cell pemfc, pr controller and, voltage source inverter vsi. Design and control of proportionalresonant controller based. This chapter aims at establishing the design and implementation of the conventional pi controllers at various operating points of the buck and boost converter. Current controller a single phase feedback current loop is used to regulate the grid current.
Files of this example can be found in examples\pll blocks\singlephase. With the ucc256302 driverintegrated resonant converter controller and ucc24624, a twochannel synchronous rectifier sr driver, this. Choose a web site to get translated content where available and see local events and offers. The application research of proportional resonance control. The design of the controller for the inverter can be divided into two parts. The proportional resonant controllers pr are introduced to fulfil the increased demand for controllers capable to follow or reject periodic signals with superior performance than conventional. Proportional integrator pi and proportional resonant pr are the two most widely used current controller 1618. More recently, the proportional resonant pr controller started to replace pi controller in a different application including gridconnected current control.
A punit current controller was proposed for the cgci load, which is equivalent to a proportional p controller in the sdomain and is equivalent to a proportional integral pi controller in the zdomain. Proportional integral plus multifrequency resonant. The design of the pr current control and the harmonic compensators will be carried out using matlab. For a resonant tank, working at its resonant frequency is the most efficient way. Onedimensional optimization for proportional resonant. Npc photovoltaic gridconnected inverter using proportional.
Comparative study of pi and proportional resonant control for. Apr 09, 20 how can i find example of current controller proportional resonant controller for grid connected renewable energy sources. Digital resonant current controllers for voltage source converters introduction plant model for currentcontrolled vscs plant model for currentcontrolled vscs i model suitable for active lters, active recti ers, adjustable speed drives decoupled back emf, etc. Comparative study of pi and proportional resonant control. Analysis and suppression of torsional vibrations in. Fractional order proportionalresonant controller hadi malek, sara dadras, chun yin, yangquan chen abstract in this paper, a fractional order synchronous frame controller and its equivalent model, stationary frame cont roller named fractional order proportional resonant controller, have been introduced using fractional order theory. The control system of the induction machine in case of one mass and twomasses has been modeled in simulink, thus, the existence of resonance conditions has also been proved in simulink. Current mode controller design for single phase grid. Harmonics by means of harmonic compensator hc, proportional resonant pr controller is.
The ys1700 programmable indicating controller can be tailored for various applications by running a user program, and offers high reliability thanks to yokogawas proprietary technology, user friendliness, and expandability. The vsi is configured to operate as a current source through an interface lfilter. However, the grid voltage may not only be unbalanced because of voltage sags, but also be distorted because of nonlinear loads on distribution systems. Npc photovoltaic gridconnected inverter using proportionalresonant controller. Tuning rules for proportional resonant controllers article pdf available in ieee transactions on control systems technology 235. The proportional resonant pr controller has been chosen as the method to eliminate the causes of torsional vibrations. The recently introduced proportionalresonant pr controllers and filters, and their suitability for currentvoltage control of gridconnected converters, are described. Pmp21683 this resonant converter reference design takes a 380v to 420v dc input and generates a 48v up to 550w output.
Pr proportional resonant controller matlab answers. Proportional integral plus multifrequency resonant current controller for gridconnected voltage source converter under imbalanced and distorted supply voltage conditions. Proportional resonant controller the inverter is a singlephase system. A proportionalresonant pr controller is used for replacing the conventional proportionalintegral pi controller in this system. Converters, pr control theory is revised in detail with a number of practical. Tuning rules for proportional resonant controllerscontrol. Ieee energy2030 atlanta, ga usa 1718 november, 2008. Here the controller operates on ac signal whereas in popular dq control or the synchronous reference frame based control the pi controller works on dc signal. The recently introduced proportional resonant pr controllers and filters. Aalborg universitet analysis, design and implementation of. With only one adjustable parameter the ponly controller is easier to tune for best performance compared to other, multiparameter forms of the pid. It is thus beneficial to use the proportional resonant pr controller fig.
Does not consist of pr controller and only used to pwm generator. Proportionalresonant controllers and filters for grid. The recently introduced proportionalresonant pr controllers and filters. Multimegawatt photovoltaic pv power plants are widespread in electrical power systems because of the drastic decrease in the pv panel prices.
The working principle is analyzed, parameter design and implementation method for pr control are given. This approach will remove the need to transform the singlephase system into the rotating reference frame in dq coordinates for the pi controller. Fortunately, the triple pole is possible thanks to the extra parameter having freedom to choose. Npc photovoltaic gridconnected inverter using proportional resonant controller. Simulation and analysis of llc resonant converter using closed loop pi controller g. The l6599a is an improved revision of the previous l6599.
National power electronic conference 2010 1 antiwindup. Open loop and closed loop bode diagrams plotted by siso tool matlab shown in fig. The quasipr controller generates the voltage reference for use of carrierbased pulse width modulation, which can effectively reduce output current ripples. Design and control of proportional resonant controller based. Based on the above a robust multi resonant pr regulator for threephase gridconnected vsi using direct pole placement design strategy bin li, ming zhang, long huang. Description and tuning of proportional band the proportional band is defined as the amount of change in input or deviation, as a percent of span, required to cause the control output to change from 0% to 100%.
National power electronics conference, 10 th june of 2010, roorkee. The role of this hybrid system is to produce dc electrical energy is given to the input of. Follow 5 views last 30 days solehuddin mahmud on 9 apr 20. A proportional resonant pr control strategy is used as a compensator to track a. Therefore it is quite appropriate for the voltage magnitude control, as shown in fig.
This paper presents a procedure to design a proportional resonant pr current controller with additional pr selective harmonic compensators for grid connected photovoltaic pv inverters. Types of controllers proportional integral and derivative. Normally, working at its highest resonant frequency will be more efficient. The recently introduced proportional resonant pr controllers and filters, and their suitability for currentvoltage control of gridconnected converters, are described. Microsemis resonant mode llc halfbridge controllers offer higher efficiency, power density and component density than possibly achievable with switching regulators, and with considerable lower noise. Proportional resonant pr controller for distribution power system.