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.
Power electronic components such as busbars, capacitors, and inductors are positioned close to each other when designing a high power density converter. Therefore, the internal near field couplings between these components should be considered when designing a low electromagnetic interference (EMI) converter. In this paper, we propose a new frequency domain model for simulation of EMI in power electronic...
Since the introduction of finite control set model predictive control (FCS-MPC) in power electronics the algorithm has been missing an important aspect that would speed up its implementation in industry: a simple method to verify the algorithm performance. This paper proposes to use a statistical model checking (SMC) method for performance evaluation of the algorithm applied to power electronics converters...
DC microgrids have become widely adapted in recent years, with 380 V being the most common voltage choice in applications like data centers and central offices around the world. For future developments with an increasing power demand, adding a second line conductor to a DC microgrid can provide means to increase overall energy efficiency. This paper evaluates fault situations in such a bipolar ±380...
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...
This Paper discusses the impact of the series compensation on the voltage profile of long transmission line. It gives some recommendations and precautions for some expected scenarios of wrong operation that might be taken due to some unknown information about the line condition. Also the paper shows that, the compensation of the line should be initially determined to avoid any problem that might be...
Modular Multilevel Converters(MMCs) are considered to be state-of-the-art power converters for high voltage applications. MMCs typically consist of a stack of capacitor-switch assemblies (known as sub-modules), and requires voltage balancing control of multiple floating capacitors. To make these control decisions accurate, it is necessary to have precise knowledge about voltages across each of these...
With the advantage of high dielectric strength and low cost, capacitive voltage transformers (CVTs) have been applied to measure the voltage in power grid widely. Recently, CVTs own the problem of big error, insulation performance degradation and high failure rate due to the complicated environment. Secondary load is an important factor to impact CVT's accuracy by analysis. Consequently, we established...
This paper presents an approach for generating simplified secondary circuit models with limited SCADA and PV micro-inverter measurement data. The proposed method is computationally efficient and can be utilized with typically available measurement data. The method is applied to models of three real U.S. utility feeders with PV micro-inverter measurements. The proposed simplified secondary circuit...
The control of modular multilevel converter (MMC) is quite challenging and demands a flexible approach to achieve multiple control objectives. The model predictive control (MPC) is highly effective and suitable to control the MMC. The control objectives are included in a single cost function and evaluated for all possible switching states. The switching state which minimizes cost function is selected...
This paper investigates a Finite-Control-Set Model Predictive Control (FCS-MPC) for the precise control of (un)balanced load currents in Modular Multilevel Converter (MMC). The control objectives are circulating currents minimization inside the converter arms, achieve a capacitors voltage balance and load current control. To achieve the converter constrained optimization and facilitate the implementation...
In this paper, a case-study analysis of radial distribution system of Moscow region is presented. This is a part of a research project on Moscow region in Russia. The purpose of this project is to improve the power quality of an important radial distribution system of Moscow region by measuring and analysis the data of the system; and then solving the problems of power quality in this system. This...
Smart grid technologies are expected to increase system efficiency and reliability using advancement in automation, communication, computation and optimization. Several control algorithms have been developed or enhanced for operation and control of smart distribution grid including Fault Detection, Isolation and service Restoration (FDIR), Optimal Feeder Reconfiguration (OFR), and Volt/Var Control...
This paper proposes a model predictive control (MPC) strategy for a nested neutral point clamped (NNPC) converter. The NNPC converter is a four-level topology that is very attractive for medium-voltage (MV) applications. This is because it has less number of components in compare to other classic four-level topologies. In this paper, the MPC strategy is developed for the NNPC converter to control...
We examine the feasibility of an attack on the measurements that will be used by integrated volt-var control (VVC) in future smart power distribution systems. The analysis is performed under a variety of assumptions of adversary capability regarding knowledge of details of the VVC algorithm used, system topology, access to actual measurements, and ability to corrupt measurements. The adversary also...
This paper deals a method of determining the optimal operation of the induction generator in off-grid for small-scale wind power. Evaluation of itself optimum operation is partly performed using model, which was created in program EMTP - ATP. Operating states of the generator is possible simulate there and determine operational capabilities of a specific type of generator for different type and size...
This paper is focused on measurement and analysis of supply voltage level in low voltage industrial power systems in Estonia. A practical method for analysis of supply voltage quality parameters implementing stochastic theory is discussed. Measurement results of supply voltage quality parameters — voltage magnitude, voltage level and voltage sags in industrial 0.4 kV power systems of Estonia are shown...
The paper deals with design analysis, simulation, synthesis and verification of power resonant converter integrated with LCLC filter, HF transformer and rectifying output. The output voltage of LCTLC in the basic AC direct mode is sinusoidal one with harmonic distortion roughly 5% in the whole range of the load with possibility of non-symmetrical control of the converter. A novel detailed analysis...
With the current push towards advanced distribution automation, the possibilities for online distributed control are increasing. One component which is currently being upgraded for increased automation capabilities is the switched shunt capacitor. In this work, a study of distributed capacitor control to regulate voltage spread in a distribution network is performed. To implement distributed control,...
A growing number of North American utilities are experiencing a significant proliferation of photovoltaic distributed generation (PV-DG). PV-DG integration can pose a challenge to distribution utilities due to the variety of impacts on several aspects of distribution systems planning and operations and the fact that hitherto distribution feeders have been designed and operated for supplying unidirectional...
The distribution power systems are often affected by the harmonics generated by single-phase electronic loads. This paper proposes an analytic model for estimating the single-phase harmonic currents of loads with bridge rectifiers based on diodes. Such a model requires low computational cost for being evaluated, and it allows investigating the harmonic of currents of loads fed by sinusoidal or non-sinusoidal...
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.