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Based on the analysis of the existing problems of photovoltaic(PV) systems with energy storage devices, the new modular independent PV power supply combined the PV cell and energy storage module was designed which contains the following five parts: the PV array, Battery module, Boost circuit, Buck circuit and the controller. The maximum power point tracking(MPPT) is located by the strategy of combining...
The authors solve the problem of effective use of renewable energy sources for autonomous electric consumers. A new device for coupling heterogeneous energy sources has been developed. The universal coupling device (UCD) allows to connect diverse AC and DC sources to a 220/380VAC consumer. A 30 kVA UCD prototype is created. The article gives a UCD brief description and presents the results of the...
In the Stationary Digital Breast Tomosynthesis(s-DBT) system, the role of the focusing electrode is to obtain clearer scanned images by focusing the electrons emitted by the carbon nanotubes. As one part of the control system of the s-DBT, the real-time control system of the focusing electrode high voltage power supply is designed. The control system using the NI CompactRIO device and LabVIEW as platform...
The problem of protecting the power supply of separate units of a mobile robot is quite similar to the problems of protecting the electrical mains. In one case we have to re-distribute the electrical energy due to lack of stability in its consumption, in another case we have to re-distribute the energy due to uneven load on separate units of mobile robots. It is impossible to predict, when this load...
The main features of additive electron beam process control system using filler wire and modern trends in design of process control systems are considered. The main way to control heat power generated in liquid metal bath during building-up welding is proven regulation of electron beam current by varying bias voltage of the electron gun. Technological advantages of pulse beam current control method...
The high voltage constant current charging power supply with high charging efficiency and good stability is developed. The power supply has the advantages of small volume, low cost, etc. Design index is that the charging constant current is 0.34A, the charging voltage is 60kV, the power is 20kW. Simulation analysis of the original system using Pspice simulation software, in the light of the average...
Nowadays distributed generation systems such as photovoltaic power generation systems and wind power generation systems have been on the increase. The increase of distributed generation systems causes the reverse power flow and the voltage rise in power distribution systems. By the way, the leading currents by the installed compensation capacitors cause the voltage rise and increase of the power loss...
Sampling points in one cycle of 400 Hz inverter are 8 times less than that of 50 Hz inverter, resulting in lower control accuracy and larger static error in 400 Hz power supply system. This paper set up a mathematical model for single-phase solid-static power supply system. The transformer leakage inductance and load can be regarded as uncertainties. A robust controller based on the principle of mixed...
The article introduces an innovative PWM current-mode technique to control the switched-mode power supplies for regulating the output of the power supply. The proposed technique can be used to control the most common offline power supply topologies and to control any dc-dc converter. Using the new methodology, it is possible to greatly simplify the internal architecture of any integrated IC controller,...
Grid-connected photovoltaic power generation and independent photovoltaic power generation which are suitable for different occasions are all important application field in photovoltaic system technology. If the two modes are connected effectively, the application range of the photovoltaic inverter can be expanded to move forward a single step, at the same time the structure of photovoltaic power...
This paper presents methods of a node voltage control and line loss surppression using Unified Power Flow Controller (UPFC) on a radial distribution system. A series converter of UPFC controls the node voltage on the load side of the converter. A shunt converter of UPFC controls the reactive current on the power supply side of the converter and suppresses the line loss of the reactive current. The...
The main power supply of Proton-Synchrotron (PS) accelerator is one of the biggest at CERN. The old rotating machine system has been replaced with a new NPC based DC/DC power supply named POPS (Power system for PS main magnets) with capacitor banks as energy storage mean. POPS is in operation since February 2011. The operation of the PS accelerator requires a specific design of the control system...
High voltage high frequency AC power supply (HVHFACPS) is widely used in military, industry, scientific research and so on. Different applications ask for different functions, such as the control modes selectable, work modes selectable, output voltage adjustable, frequency adjustable, and even the integratability and expandability. In this paper, a kind of HVHFACPS is introduced, which output voltage...
In this paper, a high voltage power supply based on an asymmetric multilevel cascaded bridge converter is presented. The required power supply shall be able to reach output voltages up to 30kV with rising and falling times shorter than 10 microseconds. Each module of the converter is supplied by an insulated dual bridge DC/DC converter allowing an independent DC-link voltage control with bidirectional...
Study of the aircraft electrical power distribution system based on TTP protocol typical signal communication, The simulation analysis of the real-time, applicability and safety of TTP bus in the distributed aircraft electrical power distribution system. This article analyzes the structure and communication mechanism to the time triggered architecture of TTP bus and the traditional event trigger,...
There is a need for more flexible and reconfigurable dc-dc converters. This has pushed designers to seek for alternative ways to control the PWM modulated switch inside the dc-dc converter. This paper presents the results of design and implementation of a fully customizable Arduino based controller for a SMPS (buck converter). The controller presented gives the user a high degree of autonomy and permits...
Due to total harmonic distortion and the time delay of the digital controller in the condition of a single-phase 400 Hz power supply, the traditional proportional-integral-differential controller cannot track the sinusoidal waveforms with zero static error. To improve the performance, the deadbeat control and the proportional-resonant control have been analyzed and contrasted in this paper. The results...
Due to the requirement of total harmonic distortion and the time delay of the digital controller in a single-phase 400 Hz power supply, the traditional proportional integral differential controller cannot track sinusoidal waveforms with zero static error. To improve the performance, proportional-resonant control has been analyzed and contrasted in this paper. On this basis, a Dual-Loop Proportional-Resonant...
This paper presents a method to improve light load efficiency and reduce the THD of input current of a boost PFC converter used in applications to high performance server power supply units. The conventional constant frequency average current mode control scheme will result lower efficiency and high THD current distortion under light load operation. To overcome this problem, this paper proposes a...
The functions, tasks and operation flow of energy management system are planned for the supervisory control platform sited in lab microgrid. The mathematical formulation on economical dispatching and optimal operation is presented in detail. The control strategy combined central control and local control is put forward for microgrid operation and validated through the microgrid PSCAD model. The results...
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