Mathematical model of mini-CHP based on salient-pole synchronous generator
| Autor: | Gennadiy Vagin, Evgeniy Solntsev, Andrey Mamonov, Anton Petrov |
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| Jazyk: | ruština |
| Rok vydání: | 2019 |
| Předmět: | |
| Zdroj: | Известия Томского политехнического университета: Инжиниринг георесурсов, Vol 326, Iss 8 (2019) |
| Druh dokumentu: | article |
| ISSN: | 2500-1019 2413-1830 |
| Popis: | Many factors affect transients in electrical systems with mini-CHP. Development of a reciprocating gas engine mathematical model based on a salient-pole synchronous generator will improve the calculations accuracy of transient and system stability. It will configure and verify the operation of voltage and rotation speed regulators of the prime engine. The main aim of the study is to develop the reciprocating gas engine mathematical model based on salient pole synchronous generator, which allows calculating, analyzing and configuring the processes in electrical 6-10 kV system with mini-CHP. The methods used in the study: analytical methods and calculation of transient status and parameters in the Simulink integrated to MATLAB. The results. The reciprocating gas engine mathematical model based on a salient-pole synchronous generator includs: 1. Automatic control excitation synchronous generator. 2. Prime engine with speed control. 3. Salient-pole synchronous generator model. The saturation of the model is achieved by using the method of partial magnetic characteristics. This method allows taking into account correctly the leakage fluxes of the excitation winding of the loaded synchronous generator. The generator model uses many factors that affect the transients in the station. It leads to more accurate results. Using the method of partial magnetic characteristics allows taking into account the changes in the parameters of the generator equivalent circuit without reliable information on magnetic properties of the materials used in the machine design and production. The methods used in the research: co-precipitation method, adsorbtion, quartering technique, determination of the particle size of calcium oxalate precipitate, obtained by precipitation of oxalic acid calcium salts from nitrate solutions, X-ray spectrometry analysis and scanning electron microscopy technique by means of the electron microscope "Inspect S" with the microanalyser Edax. The results. The paper considers the mechanisms of crystal growth depending on various factors and conditions. The authors have studied the size of the particles of calcium oxalate, obtained by precipitation with oxalic acid from nitrate solutions of calcium salts. The photographs of the precipitation were made; the dispersion analysis of the examined system of particle allocation according to size was carried out. It was ascertained that by reducing the acidity of the solution from 2,0 to 0,01 mol/l, the size of the resultant particles of calcium oxalate decreases from 42,0-35,0 to 1,0-0,1 m. |
| Databáze: | Directory of Open Access Journals |
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