In renewable energy systems, fluctuating outputs from sources and variable power demand may deteriorate the voltage quality. this paper, a model predictive control strategy without using any proportional-integral-derivative (PID) regulators is proposed. The proposed consists of current (MPCP) scheme (MPVP) method. By controlling bidirectional dc-dc converter battery storage system based on MPCP algorithm, output can be smoothed while stable dc-bus maintained. Meanwhile, ac/dc interlinking...

In the work package ‘Integrated Positioning’ of Ubiquitous Cartography for Pedestrian Navigation project (UCPNAVI) alternative location methods using active Radio Frequency Identification (RFID) are investigated positioning pedestrians in areas where no GNSS position determination is possible due to obstruction satellite signals. most common RFID applications, performed cell-based positioning. tags can be installed at landmarks (i.e., known locations) surroundings and a user equipped with an...

This paper presents a control system that combines photovoltaic (PV) grid-connected generation and power quality managements. With the proposed structure, can not only realize generation, but also suppress current harmonics, compensate reactive power, eliminate voltage sags or swells mitigate instantly interruption other problems. An adaptive predictive maximum point tracking (MPPT) algorithm is employed to improve efficiency of PV generation. To simplify control, synchronous reference frame...

Connected to high-voltage power system directly, electrified railway is a particular user system, and its loads have the characteristics such as non-liner, asymmetry volatility so on. Researched on Chunshen traction substation which belongs Shanghai-Hangzhou Electrified Railway, accorded requirements of comprehensive management harmonics, reactive negative sequence currents in railway, this paper proposes novel Multilevel Power Quality Compensator (MPQC). This MPQC composed two single-phase...

A photovoltaic (PV) grid-connected power conditioning system with the function of uninterruptible supply (UPS) is presented in paper. It can not only realize generation, but also has full shunt active filter (APF). In addition, it act as UPS when instantly interruption occurs. The instantaneous reactive theory employed harmonics current detecting and signal synthesis algorithm reference current. proposed control strategy two modes (Grid connection mode mode) which switch to each other...

This paper presents a single-phase photovoltaic power conditioning system (PVPC) based on Z-source impedance network instead of conventional boost converter. Using networks, the can work within wider range PV array output voltages than for Single phase instantaneous reactive theory is adopted harmonics current detection and synthesis algorithm combining harmonic components with active component used to produce reference compensation signals. The whole modeled simulated in Matlab/Simmulink...

This paper proposes a combined method for short-term forecasting of photovoltaic (PV) power generation, especially PV in micro-grids. To decrease the computational complexity and uncertainty traditional which has to consider many complex external environment factors, focuses only on direct relationships among micro-sources. The combines three models so as improve precision. In first model, historical data is quantized clustering with Self-organizing Map Least Squares Fitting method. second...

With the widespread use of large-capacity power electronic devices, there are too much harmonic current and voltage in system at same time. The active filter (APF) or hybrid (HAPF) can only eliminate voltage, possibility resonance. To simultaneously enhance capacity, paper presents a unified quality conditioner (HUPQC). Compared with UPQC, HUPQC is made up series (the device) shunt device). device employs an injection circuit to lower capacity part fit high-voltage system. Designed...

To utilize maximum solar energy, power point tracking (MPPT) control is much important for PV system. The paper presents a new MPPT method based on adaptive predictive algorithm which superior to traditional Perturbation and Observation (P&O) method. output predicted improve the speed deduce possibility of misjudgment increasing or decreasing voltage. Because can be obtained directly, close loop established so as achieve precise prediction. Simulations experiments prove that proposed...

With the test on characteristics of photovoltaic arrays, we can assess performance arrays effectively. Its help to research and development system. The paper introduces testing technology proposes an algorithm predict arrays. Using this method curve which shows be established according field-testing data under arbitrary temperature irradiation. helps reflect actual condition

The harmonic voltage in power grid is enlarged with kinds of dynamic source and a great deal active equipments non-linear loads connected to the grid. In order compensate current caused by Active Power Filter, paper analyses shortcomings control based on sinusoidal proposes novel close-loop method for Filter A fore-feed realized under condition high load impedance detecting point common coupling (PCC). proposed very simple can improve performance traditional controller simulation confirms...