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Matthias Jońca Isabellaque Leraczyk colloquuntur cum Petro Garnsey, professore emerito Cantabrigiensi, litterarum atque rerum gestarum scrutatore.

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Censura Oedipodis et Troadum, tragoediarum Senecae a Thoma Sapota et Ivona Słomak Polonice redditarum.

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In Gedaniensi Theatro Litoris spectari possunt Euripidis Troades a Ioanne Klata directae. Qui director omnia fecit, ut spectatoris rerum novarum cupidi benivolentiam captaret, sensumque Troadum oblitteravit multas scaenas delendo et pro eis locos ex aliis tragoediis Euripideis sumptos inducendo. Digna laude videtur sola Dorothea Kolak, quae optime Hecubae partes agat.

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Imprimitur hic clara oratio Thomae Aquinatis Creator ineffabilis, ante studium recitanda. Textui Latino subiungitur brevis paraphrasis Polonica ab Anna Komornicka facta.

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In epistulis ad Ioannem Kwapisz, nostri collegii editorum secretarium, profestrix Anna Komornicka, quae prius per multos annos fuit „Maeandri” editrix, ostendit suis successoribus maximam benivolentiam.

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Oratio in funere profestricis Annae Komornicka dicta, in qua ostenditur, quanti momenti fuerit ea clara femina in vita suorum familiarium.

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Nomina composita tractantur, quae Graeco in poemate, sub nomine Orphei de lapidibus sive Lithica tradito et, ut videtur, inter saeculum secundum et quartum post Christum natum composito, continentur. Demonstratur, quibus elementis constent, quemadmodum constructa sint, quid significent et utrum a Homero originem suam trahant an non. Concluditur, quae genera nominum compositorum in poemate plurima sint.

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Imprimuntur hic tria capita operis Gelliani a Monica Wesołowska Polonice versa. Quorum in primo disseritur de usu obsoletarum vocum in sermone cotidiano, in secundo de emolumentis e iurgiosa uxore domi habenda ductis, in tertio autem de philosophis, qui servi fuerint.

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Heroinas et heroas, quos mala fortuna in tragoediis Graecis persequitur, aliae personae scenicae commiserantur, aliae autem spernunt et irrident. Narratur hic, quomodo tales animi passiones quarundam tragoediarum actionem afficiant.

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In hac dissertatiuncula opiniones, quas Plutarchus Chaeronensis nonnullis suis opusculis in collectione, cui Moralia titulus est, asservatis de amicitia exhibuit, monstrantur et cum Platonis Aristotelisque doctrinis breviter comparantur.

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Marcellus Górkiewicz, archaelogus Polonus, anno 1879 rogatu Henrici Schliemann dirigebat excavationes duorum tumulorum prope locum antiquae Troiae sitorum. Quorum imagines ab eo pictae apparent in libro Schliemanniano, cui titulus est Ilios, anno 1881 Lipsiae edito.

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Narratur de Francisco Terlikowski, linguae Latinae magistro, qui edidit varia scriptorum antiquorum opera ad usum in scholis destinata atque librum, in quo antiquorum vitam et litteras discipulis monstrat. Qui liber, primum impressus anno 1893, in XL annorum spatio multas editiones habuit.

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In ecclesia Calvinistarum sita Caioduni, quod est oppidum Lithuaniae, invenitur inscriptio celebrans memoriam Adami Freytag Thoruniensis (1608–1650), auctoris libri, cui titulus est Architectura militaris nova et aucta. Hic editur inscriptio et narratur de ipso Adamo Freytag.

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Describuntur fata Aristophanis fabularum in theatris Russiae, praesertim tempore Vladimiri Lenin et Michaelis Gorbačov.

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Narratur de Thaddaei Zieliński, clarissimi philologi classici Poloni, vita, quam affecerunt magnae mutationes eius aevo in Polonia, Germania et Russia factae.

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Varii clandestini coetus in Polonia a Germanis occupata vario modo solvere conabantur quaestionem, quomodo Poloni hoste debellato educari deberent. Eae factiones, quae communismo favebant, volebant parvi momenti esse in schola artes liberales atque linguam Latinam, quippe quibus studiis vulgus ab educatione arce retur.

The paper presents the analysis of different fault states in drive systems with multiphase induction motors. The mathematical models of a five-phase and six-phase induction motor and the MRASCC estimator have been presented and the description of the Space Vector Modulation has been shown. The Direct Field-Oriented Control (DFOC) system is analyzed. Results of the simulation and experimental studies of the Direct Field-Oriented Control systems in the fault conditions are presented. The author’s original contribution includes analysis and studies of the DFOC control method of a five-phase induction motor resistant to the motor speed sensor fault with the use of the MRASCC estimator.

In order to solve the problem of traditional carrier phase-shift modulation with multiple ratios or PI controllers and cumbersome tuning parameters, this paper uses improved carrier phase-shift modulation. The total turn-on number of sub-modules each bridge arm is determined by comparing the sinusoidal modulated wave with the triangular carrier, and then the control signal is generated according to the capacitance voltage sorting result and the bridge armcurrent polarity. However, this modulation method uses a sorting method that causes the insulated gate bipolar transistor (IGBT) have an excessively high switching frequency. Therefore, a sorting trigger condition that can effectively reduce the switching frequency is used. The method determines whether to reorder based on the error between the voltage average and the actual value. For the circulation problem, the double-frequency negative sequence component is extracted by rotating coordinate transformation, and it is suppressed by PI control. A 21-level MMC model was built in MATLAB/simulink to analyze the sub-module capacitor voltage fluctuation, output current, voltage distortion rate and bridge arm circulation. It is verified that the modulation method can combine the sorting algorithm and circulation suppression method at the same time, and has better voltage equalization and circulation suppression effects.

Brushless DC motors are often used as the power sources for modern ship electric propulsion systems. Due to the electromagnetic torque ripple of the motor, the traditional control method reduces the drive performance of the motor under load changes. Aiming at the problem of the torque ripple of the DC brushless motor during a non- commutation period, this paper analysis the reasons for the torque ripple caused by pulse- width modulation (PWM), and proposes a PWM_ON_PWM method to suppress the torque ripple of the DC brushless motor. Based on the mathematical model of a DC brushless motor, this method adopts a double closed-loop control method based on fuzzy control to suppress the torque ripple of the DC brushless motor. The fuzzy control technology is integrated into the parameter tuning process of the proportional–integral–derivative (PID) controller to effectively improve the stability of the motor control system. Under the Matlab/Simulink platform, the response performance of different PID control methods and the torque characteristics of different PWM modulation methods are simulated and compared. The results show that the fuzzy adaptive PID control method has good dynamic response performance. It is verified that the PWM_ON_PWM modulation method can effectively suppress the torque ripple of the motor during non-commutation period, improve the stability of the double closed-loop control system and meet the driving performance of the motor under different load conditions.

With the increasing number of electric vehicles (EVs), the disordered charging of a large number of EVs will have a large influence on the power grid. The problems of charging and discharging optimization management for EVs are studied in this paper. The distribution of characteristic quantities of charging behaviour such as the starting time and charging duration are analysed. The results show that charging distribution is in line with a logarithmic normal distribution. An EV charging behaviour model is established, and error calibration is carried out. The result shows that the error is within its permitted scope. The daily EV charge load is obtained by using the Latin hypercube Monte Carlo statistical method. Genetic particle swarm optimization (PSO) is proposed to optimize the proportion of AC 1, AC 2 and DC charging equipment, and the optimal solution can not only meet the needs of users but also reduce equipment investment and the EV peak valley difference, so the effectiveness of the method is verified.

During a blackout, after the post-disaster collapse of an electric power system (EPS), units of thermal power plants should switch-over to the house load operation mode (PPW). However, regarding the dynamics of a post-disaster blackout process, many units can be in forced outage Therefore, restart of these units from the start-up sources with a self-start capability is necessary. The Transmission Network Code in force imposes periodic tests and system tests for such sources. Any system test must be preceded and followed by simulation investigations in which the possibilities: (1) to bring voltage to the started-up power plant by a starting path and (2) to activate the highest-power auxiliaries (PW) of the unit being started-up are evaluated. In the paper, chosen results of simulative investigations of the transient phenomena in the starting path from the hydroelectric power plant of Włocławek (HPP Włocławek) to the thermal power plant of P˛atnów (TPP P˛atnów), related to the system test conducted in September 2017 have been presented.

The article presents the consequences of the introduction of EU regulation 2016/631 for power park modules (PPMs), of which wind farms are a typical example. Analysing the yearlong course of changes in the generated power, the possibility of a typical wind farm meeting the requirements for the production and absorption of reactive power was checked. It was shown that in the selected cases it was necessary to introduce additional sources of reactive power on the side of the farm’s MV.

Along with the increase in the use of nonlinear electronic devices, e.g. personal computers, power tools and other electrical appliances, the requirements for uninterruptible power supplies are constantly growing. This paper proposes a method and deep analysis of results viable for checking how single-phase uninterruptible power supplies (UPSs) cope with nonlinear circuits under varying power loads in terms of electric energy quality.Various classes of single-phase UPS systems with different topologies were tested, for instance line-interactive and double conversion (online) single-phase UPS devices. Furthermore, measurements were carried out in view of a power source – loads were supplied both from a power grid and UPS built-in battery. Juxtaposition of the obtained results such as a THDU, THDI (Total Harmonic Distortion) percentage ratio of input/output voltage and current, a power factor and crest factor volume etc. of the tested UPS systems indicated major differences in their performance during laboratory tests.