The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
In this paper a detailed description of the design and simulation of a DC ultra-fast recharging station for Electric Vehicles is carried out. The system consist of a single AC/DC grid connected inverter, a DC-Bus and two DC/DC converter to recharge the batteries of the EVs. The system also has the vehicle-to-grid (V2G) capability. The design of the components of the system and the control schemes...
A novel load current sharing method is proposed for multi-module LLC resonant converters in high power application in this paper. The paralleled system is controlled by the maximum current sharing method to achieve load sharing automatically. Moreover, a series inductor is connected to each LLC output side to restrain the current ripple of double switching frequency. The maximum current sharing method...
This paper presents an approximate-model-based predictive current control (AMPCC) method for current regulation of buck converter, when it operates in continuous-conduction mode (CCM). In addition, the inductor current constraints are incorporated to further reduce the output voltage ripple. The output current of the buck converter is directly manipulated by the proposed AMPCC controller without PWM...
This paper presents the systematic design and performance of two controls for half-bridge converters with LCL output filters based on a similarity transformation. This type of converters is commonly used in, for example, grid or battery interfaces. Both controls feature active damping, i.e. filter resonances are damped through software and not by using passive resistors. Moreover, both controls are...
A design of a feed-forward-based fractional-order model reference adaptive control (FO-MRAC) compensator using a modified MIT rule to control a DC-DC boost converter is presented in this work. As the plant is non-minimum phase, an implementation of the so-called parallel feed-forward configuration is required to make the plant satisfy ASPR (almost strictly positive real) conditions that in turn, allows...
Dynamic Voltage Restorer (DVR), as a device of voltage sag compensation, demands fast transient response, and the disturbance of source voltage is a main impact on control performance. The DVR control strategy based on discrete state space will enhance control bandwidth and stability. However, for the discrete space control system, the number of parameters is relatively more which will lead to a complicated...
This paper proposes a Current Deadbeat Control (DBC) algorithm for a three-phase 9-cells qZS based Cascaded H-Bridge (CHB) inverter to ensure grid current supply with low THD. The studied topology is considered as a single-stage DC/AC topology having the capability of boosting the DC input voltage with high-quality multilevel AC voltage, independent DC-link voltage compensation, and control of the...
Magnetic levitator is a challenging problem to address complex control systems in control teaching. In this paper the magnetic levitator model is synthetized using a Port Hamiltonian approach and with this model, an observed state gain feedback is tuned with a LQG technique. Then a SMC that used the observed state gain feedback in the sliding zone is developed, establishing the requirements for feedback...
The transient performance of a DC power supply strongly depends on the loop design and output filter sizing. Most of the time, the finite loop bandwidth imposes the need of a large output filter capacitor in order to comply with the required regulation performance and stability margins. In space applications the linear conductance control principle has been used for a long time. It reduces the voltage...
A control algorithm for an integrated power factor correction (PFC) and series resonant converter (SRC) using only two switches is presented, allowing to open loop control the AC input current and the DC output current independently. The theory for this approach is analyzed in time domain and a novel approach for open loop regulation is presented and verified. The software defined power (SDF) control...
This paper presents an adaptive slope compensation method for peak current mode control of digital controlled DC-DC converters, which controls the quality factor of the complex conjugated poles at half the switching frequency. Using quality factor control enables optimization of the dynamic performance and stability of current mode control. The presented method adapt to DC-DC converter operating conditions...
The paper presents a new soft switching system in three-phase voltage source inverters. In the majority of existing soft switching systems, there is a risk of damaging main or auxiliary transistors in the case of disturbances in the control system due to capacitors that are connected in parallel to the main transistors and due to resonant inductors which are connected in series to the auxiliary transistors...
Verifying attacks against cyber physical systems can be a costly and time-consuming process. By using a simulated environment, attacks can be verified quickly and accurately. By combining the simulation of a cyber physical system with a hybrid attack graph, the effects of a series of exploits can be accurately analysed. Furthermore, the use of a simulated environment to verify attacks may uncover...
The Rancor Microworld is a recently developed low- fidelity Nuclear Power Plant Simulator. The microworld concept provides a simplified representation of an integrated 30 MW pressurized water reactor that can be taken from a cold-shutdown through turbine startup and load generation. Non-expert operators can be trained to competently operate the Rancor simulator within an hour, and it has already been...
A monolithic CMOS DC-DC converter with integrated power switches and a novel variable-frequency boundary conduction mode for feedback control is presented in this paper. Implemented in a 0.18-um CMOS technology, the operating frequency is from 90 kHz to 500 kHz and the power efficiency can achieve 92.6%. The total area including I/O pads is 1.1mm × 1.15mm.
This paper deals with the design of suitable control strategy for a dual input DC/DC converter. Nowadays, it becomes very essential to stabilize the output voltage of DC/DC converter for hybrid energy application. To achieve this objective, control of duty ratios of switches using different control strategies is proposed in this paper. Comparative analysis has been carried out between two control...
This paper proposes a novel modular multilevel DC/DC converter(MMDDC) used in super capacitor energy storage system(ESS). Unlike the conventional MMDDC, this converter has an ability to overcome the problem associated with over-current in charge mode. Along with that, it also possesses advantage of convenience in pre-charging super capacitors(SCs) from DC link without additional charging circuits...
The boost inverter can be an alternative grid interfacing power converter for renewable energy sources since it can generate an AC voltage whose peak value could be greater than the DC voltage. When it connects to the grid, high quality output current is required, therefore, grid current is hoped to be controlled directly. A novel control strategy to control grid current with only one closed control...
In this paper, based on the dimethyl ether plant process and production process control system, the optimal design of DME control system is studied and the simulation system are established. First of all, the production equipment is regarded as the research object, and through the device operation requirements and device characteristics of structural analysis, and combined with the DCS control system...
This paper introduces a new hardware efficient auto tuning for digitally controlled average current-mode (ACM) controllers. The auto-tuning procedure extracts the required coefficients of the ACM controller to achieve tight voltage regulation as well as closed-loop dynamic performance that may be defined by the end-user. System stability is facilitated for wide operation range under parameters uncertainties...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.