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Journal articles on the topic 'Electrohydraulic regulation of steam turbine'

Author: Grafiati

Published: 4 June 2021

Last updated: 9 February 2022

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1

Yan, Guishan, Zhenlin Jin, Tiangui Zhang, and Penghui Zhao. "Position Control Study on Pump-Controlled Servomotor for Steam Control Valve." Processes 9, no. 2 (2021): 221. http://dx.doi.org/10.3390/pr9020221.

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In steam turbine control and actuation, the steam control valve plays a key role in operability and reliability. The electrohydraulic regulating system for the steam control valve, usually called the servomotor, needs to be reliable and high performing under nonlinear excitation interference in actual conditions. Currently, electrohydraulic servo valve control technology is widely used in servomotors. Although this technology has good control performance, it still has some technical defects, such as poor antipollution ability, low energy efficiency, large volume size, and limited installation

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2

Novoselov, V. B. "Investigation and optimization of parameters of the electrohydraulic control system of a steam turbine." Thermal Engineering 56, no. 4 (2009): 299–304. http://dx.doi.org/10.1134/s0040601509040077.

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3

Raina, Faisal Mushtaq, and Gagan Deep Yadav. "Frequency Regulation in Wind Turbine and Steam Turbine based Power System." International Journal of Trend in Scientific Research and Development Volume-1, Issue-6 (2017): 197–205. http://dx.doi.org/10.31142/ijtsrd2412.

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4

Efimov, Nikolai N., Sergei V. Skubienko, Vadim V. Kopitsa, Dmitry V. Stepovoy, Alexander D. Ovechkin, and Vasiliy N. Baltyan. "Analysis of wet-steam microturbine self-regulation characteristics." MATEC Web of Conferences 226 (2018): 01010. http://dx.doi.org/10.1051/matecconf/201822601010.

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The paper analyzes the characteristics of a wet-steam microturbine self-regulation with a constant and variable consumption of a wet steam, depending on the rotor speed of the turbine. The characteristics of self-regulation are the electric power, the consumption load and the torque generated on the microturbine blades. The dependence of electric power on the rotation speed for a wet-steam microturbine with a power of 5 kW is constructed.

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5

Liu, Jie, and Chang Yi Jin. "Research on Applications of EPKS C300 System to Steam Turbine and Boiler." Advanced Materials Research 706-708 (June 2013): 1511–15. http://dx.doi.org/10.4028/www.scientific.net/amr.706-708.1511.

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A new HONEWELL process controlling system, namely EPKS C300, was systematically introduced. Applications of the system to 7# steam turbine and 9# boiler in the Baling Petrochemical Thermal Power Division and some important controlling strategies have been briefly investigated. EPKS C300 was used for the technical reform of the steam turbine and boiler. SCM sequence control, drum level three impulse control and DEH system modification were implemented on the boiler. With the help of FSSS system, furnace safety monitoring, automatic speed regulation of steam turbine unit, load automatic control

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6

Pawlak, Mariusz, Janusz Buchta, and Andrzej Oziemski. "Fault diagnosis of sensors in the control system of a steam turbine." Journal of Automation, Electronics and Electrical Engineering 1, no. 1 (2019): 29–36. http://dx.doi.org/10.24136/jaeee.2019.004.

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A diagnostic and control system for a turbine is presented. The influence of the turbine controller on regulation processes in the power system is described. Measured quantities have been characterized and methods for detecting errors have been determined. The paper presents the application of fuzzy neural networks (fuzzy-NNs) for diagnosing sensor faults in the control systems of a steam turbine. The structure of the fuzzy-NN model and the model’s method of learning, based on measurement data, are presented. Fuzzy-NNs are used to detect faults procedures. The fuzzy-NN models are created and v

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7

Radmilovic, Nebojsa, Slavisa Stojakovic, and Goran Kvascev. "One solution of main controller in thermal power plants." Journal of Automatic Control 18, no. 1 (2008): 5–8. http://dx.doi.org/10.2298/jac0801005r.

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This paper describes functionality between pressure regulation of steam boiler and electrical power regulation of turbine-generator system at thermal power plants. Importans of this control is essentially in coordinate work mode when these complex and non-linear systems have to work as one integrated entity with tendency to produce electrical power at optimal and stable way. Steam generator - boiler is system with long transport delay and here is recommendation for improving pressure regulation. This regulation realized at thermal power plant nominal power 308MW and given working results in re

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8

Sultanov, M. M., and E. V. Kuryanova. "Research of the application of hydrogen as a fuel to improve energy and environmental performance of gas turbine plants." Power engineering: research, equipment, technology 23, no. 2 (2021): 46–55. http://dx.doi.org/10.30724/1998-9903-2021-23-2-46-55.

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THE PURPOSE. To consider various variants of thermal schemes of power plants and to assess the main technical and economic parameters. The article presents the results of the development of schemes of electric power plants with a capacity of up to 100 kW with a steam-generating hydrogen-oxygen plant for modeling and selecting effective options for thermal schemes of microgeneration power plants at the stage of design and development of energy systems. METHODS. The analysis of the proposed variants of thermal schemes with a hydrogen-oxygen steam generator, including circuit solutions of micro-g

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9

Becirovic, Elvisa, Jakub Osmic, Mirza Kusljugic, and Nedjeljko Peric. "Design of Model Reference Controller of Variable Speed Wind Generators for Frequency Regulation Contribution." International Journal of Computers 15 (March 22, 2021): 14–22. http://dx.doi.org/10.46300/9108.2021.15.3.

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This paper presents a novel control algorithm for variable speed wind generators (VSWG), designed to provide support to grid frequency regulation. The proposed control algorithm ensures that VSWG ‘’truly’’ emulates response of a conventional generating unit with non-reheat steam turbine (GUNRST) in the first several seconds after active power unbalance. A systematic method of analysis and synthesis of the new control algorithm is described in detail.

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10

Wang, Jinlong, Ang Song, and Yanchang Kang. "Analysis and treatment of jitter for 300MW steam turbine high-pressure control valve." E3S Web of Conferences 271 (2021): 01018. http://dx.doi.org/10.1051/e3sconf/202127101018.

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The high-pressure control valve of Weifang power generation Co. LTD unit one turbine happens to jitter during operation, especially in the low opening action, the jitter is more frequent. This situation is serious for the safety and stability of generating unit. This paper analyzes the cause of the high-pressure control valve jitter and formulates effective reconstruction plans. After the reform of the high-pressure control valve, it can maintain stable and normal regulation to ensure the safety and stability of the generating unit.

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11

Wang, Wei, Yang Sun, Sitong Jing, Wenguang Zhang, and Can Cui. "Improved Boiler-Turbine Coordinated Control of CHP Units with Heat Accumulators by Introducing Heat Source Regulation." Energies 11, no. 10 (2018): 2815. http://dx.doi.org/10.3390/en11102815.

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It is significant for power system stability to improve the operation flexibility of grid-connected units. Such improvement has always been a hot topic, especially for coal-fired units. In recent decades, it has become increasingly urgent and challenging as large-scale fluctuant renewable energy is connected to the power grid. Boiler-turbine coordinated control strategy (CCS), which is employed to perform unit load control according to automatic generation control (AGC), has a slow ramp rate in general on account of large delay and inertia of boiler, so to improve the unit operating flexibilit

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12

Yasmine Begum, A., and G. V. Marutheeswar. "Design of MPC for Superheated Steam Temperature Control in a Coal-fired Thermal Power Plant." Indonesian Journal of Electrical Engineering and Computer Science 4, no. 1 (2016): 73. http://dx.doi.org/10.11591/ijeecs.v4.i1.pp73-82.

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<p>A superheater is a vital part of the steam generation process in the boiler-turbine system. Reliable control of temperature in the superheated steam temperature system is essential to guarantee efficiency and high load-following capability in the operation of coal-fired Thermal power plant. The PI and PID controllers are extensively used in cascade control of secondary superheated steam temperature process.The design and implementation of a Model Predictive Control (MPC) strategy for the superheated steam temperature regulation in a thermal power plant is presented. A FOPTD model is d

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13

Wang, Zhen He. "Condition Analysis of Steam Turbine Digital Electro-Hydraulic Control System Based on Data Fusion." Applied Mechanics and Materials 602-605 (August 2014): 954–57. http://dx.doi.org/10.4028/www.scientific.net/amm.602-605.954.

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Aiming at the problem that the system of DEH regulation system is complex and difficult to analyze its condition, a method based on characteristic extraction and information fusion is proposed. By making RCM analysis, the indexes for quantitative risk evaluation of fault modes are determined, and the fuzzy rule base for risk evaluation is built. Using fuzzy inference, the system fault modes are ranked according to their risk level. Then, the condition characteristic parameters are extracted according to the pivot fault modes. Using the extracted characteristic parameters, an information fusion

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14

Novoselov, V. B. "Use of encoders to measure the position of servomotors in the electrohydraulic systems for automatic control of steam turbines produced by the ZAO Ural Turbine Works." Thermal Engineering 58, no. 1 (2011): 26–29. http://dx.doi.org/10.1134/s0040601511010137.

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15

Yang, Jian Meng, Ya Qing Jia, and Feng Ying Liang. "The Application of Improved Fuzzy Analytic Hierarchy Process (FAHP) in the Condenser Fault Diagnosis." Applied Mechanics and Materials 446-447 (November 2013): 1104–8. http://dx.doi.org/10.4028/www.scientific.net/amm.446-447.1104.

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The vacuum of condenser is an important parameter in the operation of steam turbine, which has a great influence on the safe operation and regulation performance of the turbine. Since the influential factors of vacuum reduction of condenser are fuzzy and uncertain, the improved FAHP is used. By comparing every two of the influential factors, the fuzzy matrix is constructed. The weight index of influential factors of vacuum reduction of condenser in a certain power plant is calculated out quantitatively. The most important influential factor is found out. And there is a verification which exact

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16

Liu, Sheng, Baoling Zhao, Shiquan Zhao, Lanyong Zhang, and Ling Wu. "An Intelligent Bio-Inspired Cooperative Decoupling Control Strategy for the Marine Boiler-Turbine System with a Novel Energy Dynamic Model." Energies 12, no. 24 (2019): 4659. http://dx.doi.org/10.3390/en12244659.

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This paper presents an intelligent bio-inspired cooperative decoupling control strategy (IBICDC) for the problems of modeling difficulties and strong coupling in the marine boiler-turbine system (MBTS). First, the model of the main steam pressure control loop is successfully constructed by introducing the Martin-Hou equation, which solves the modeling difficulty caused by the complexity of structure, operation mechanism, and operation conditions, as well as the characteristics of nonlinearity, parameter time-varying, and time-delay in the marine boiler (MB). According to the mathematic method

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17

Gimelli, Alfredo, and Massimiliano Muccillo. "Regulation Problems of Combined Cycle Gas-Steam Turbine Power Plant in a Liberalized Market: Part II - Thermodynamic Analysis." International Review on Modelling and Simulations (IREMOS) 9, no. 5 (2016): 348. http://dx.doi.org/10.15866/iremos.v9i5.10756.

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18

Lihua, CAO, WANG Wenlong, LUO Huanhuan, HU Pengfei, WANG Yong, and SUN Liang. "Determination of Minimum Flow Rate of Low Pressure Cylinder of Steam Turbine under Deep Peak Load Regulation Conditions." Journal of Mechanical Engineering 56, no. 16 (2020): 98. http://dx.doi.org/10.3901/jme.2020.16.098.

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19

Khrustalev, V. A., and M. V. Garievskii. "Efficiency of Using the Auxiliary Boiler for Peak Power Generation by a Steam Turbine of NPP." ENERGETIKA. Proceedings of CIS higher education institutions and power engineering associations 64, no. 1 (2021): 78–90. http://dx.doi.org/10.21122/1029-7448-2021-64-1-78-90.

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The article presents the technique of an estimation of efficiency of use of potential heat output of an auxiliary boiler (AB) to improve electric capacity and manoeuvrability of a steam turbine unit of a power unit of a nuclear power plant (NPP) equipped with a water-cooled water-moderated power reactor (WWER). An analysis of the technical characteristics of the AB of Balakovo NPP (of Saratov oblast) was carried out and hydrocarbon deposits near the NPP were determined. It is shown that in WWER nuclear power plants in Russia, auxiliary boilers are mainly used only until the normal operation af

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20

Du, Rong Hua, Li Hong Wang, Guo Bin Zhang, Peng Tao Zhang, and Jian Hua Yin. "The Study and Analysis of Condensate System of Control Strategy Based on Automatic Startup and Shutdown Control System in Supercritical Unit." Applied Mechanics and Materials 602-605 (August 2014): 1223–27. http://dx.doi.org/10.4028/www.scientific.net/amm.602-605.1223.

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Through the introduction of the condensate system in 350 MW supercritical unit,we analysis and study the whole control strategy of condensate water based on automatic startup and shutdown control system.We realize condensate system of automatic startup and shutdown control and can automatically adjust deaerator level and pressure of condensation water pipe. The results is that the whole control strategy of condensate water based on automatic startup and shutdown control system is very good in controlling quality and has a good application value. 0 Preface APS is a control center of startup and

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21

Gimelli, Alfredo, and Massimiliano Muccillo. "Regulation Problems of Combined Cycle Gas-Steam Turbine Power Plant in a Liberalized Market: Part I - Experimental Investigation and Energetic Analysis." International Review on Modelling and Simulations (IREMOS) 9, no. 4 (2016): 295. http://dx.doi.org/10.15866/iremos.v9i4.10755.

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22

Kulakov, G. T., A. T. Kulakov, and K. I. Artsiomenka. "Parametric Optimization for Automatic Control System of 300 MW Power Units at a Constant Steam Pressure Upstream of the Turbine." ENERGETIKA. Proceedings of CIS higher education institutions and power engineering associations 61, no. 5 (2018): 451–62. http://dx.doi.org/10.21122/1029-7448-2018-61-5-451-462.

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The problem of parametric optimization of automatic control systems of power units (ACSPU) of 300 MW at the Lukoml’skaya GRES (Lukoml Condensing Power Plant) at a constant superheated steam pressure upstream of the turbine is under consideration. During 1974–1979, eight units of the Lukoml’skaya GRES implemented ACSPU with a leading boiler power control, which will be forced to work in a wide range of loads due to the planned commissioning of two power units of the Belarusian NPP: the first one – in 2019, and the second one – in 2020. The total capacity of the Belarusian Nuclear Power Plant wi

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23

Lyman, Frederic A. "A Practical Hero." Mechanical Engineering 126, no. 02 (2004): 36–38. http://dx.doi.org/10.1115/1.2004-feb-3.

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This article illustrates history and evolution of hero turbine. In 1830s, William Avery, a mechanic, designed and built a Hero turbine that could manage significant, useful work. It powered several gristmills and sawmills in New York State, and even drove a locomotive. Ambrose Foster and William Avery were granted a patent on September 28, 1831 for their improvement in the Steam Engine, commonly called the Reacting Engine. The Avery engine probably had other problems such as noise, vibration, the difficulty in sealing the rotary coupling, and the problem of speed regulation. These problems wou

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24

Aminov, R. Z., A. N. Bayramov, and M. V. Garievskii. "Evaluation of System Effectiveness of Multifunctional Hydrogen Complex at Nuclear Power Plants." Alternative Energy and Ecology (ISJAEE), no. 13-15 (June 26, 2019): 24–39. http://dx.doi.org/10.15518/isjaee.2019.13-15.24-39.

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The paper gives the analysis of the problem of the primary current frequency regulation in the power system, as well as the basic requirements for NPP power units under the conditions of involvement in the primary regulation. According to these requirements, the operation of NPPs is associated with unloading and a corresponding decrease in efficiency. In this regard, the combination of nuclear power plants with a hydrogen complex is shown to eliminate the inefficient discharge mode which allows the steam turbine equipment and equipment of the reactor facility to operate in the basic mode at th

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25

Artsiomenka, K. I. "Structural-and-Parametric Optimization of Automatic Control System for Power Units of 300 MW in Wide Range of Load Variations." ENERGETIKA. Proceedings of CIS higher education institutions and power engineering associations 62, no. 5 (2019): 469–81. http://dx.doi.org/10.21122/1029-7448-2019-62-5-469-481.

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The structural-parametric optimization of the automatic control system for power units (ACSPU) of 300 MW of Lukoml’skaya GRES (Lukoml Local Condensing Power Plant) in the mode of both the permanent and the variable superheated steam pressure upstream of the turbine is under consideration. During 1974–1979, eight units of the Lukoml’skaya GRES implemented the ACSPU with a leading boiler power control. At the moment, these systems no longer meet all the frequency control quality requirements. In 2016, the daily schedule of electric loads of the Belarusian power system was as follows: the basic p

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26

Li, Xingshuo, Jinfu Liu, Jiajia Li, Xianling Li, Peigang Yan, and Daren Yu. "A Stacked Denoising Sparse Autoencoder Based Fault Early Warning Method for Feedwater Heater Performance Degradation." Energies 13, no. 22 (2020): 6061. http://dx.doi.org/10.3390/en13226061.

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Power grid operation faces severe challenges with the increasing integration of intermittent renewable energies. Hence the steam turbine, which mainly undertakes the task of frequency regulation and peak shaving, always operates under off-design conditions to meet the accommodation demand. This would affect the operation economy and exacerbate the ullage of equipment. The feedwater heater (FWH) plays an important role in unit, whose timely fault early warning is significant in improving the operational reliability of unit. Therefore, this paper proposes a stacked denoising sparse autoencoder (

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27

Korobets, P. N., V. V. Slovik, and N. B. Karnitskiy. "Having CHPP involved in frequency control related to starting Belarusian NPP." Safety and Reliability of Power Industry 11, no. 3 (2018): 241–46. http://dx.doi.org/10.24223/1999-5555-2018-11-3-241-246.

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The policy of restructuring the generating capacities of the energy system of the Republic of Belarus assumes the introduction of the the Belarusian nuclear power plant (NPP) in the coming years. The presence of external and internal factors affecting the sale of electricity from NPP will require solving a number of problems, including power redundancy and frequency control through involvement of internal power generating facilities. These include steam-turbine state power plants and combined heat and power plants (CHPP), combined-cycle power units, special mobile electric power units, the com

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28

"Multi-Criteria Modeling of Processes in a Vaporjet Condensation Turbine Ejector Mixing Chamber and Its Design." Bulletin of the South Ural State University series "Power Engineering" 20, no. 3 (2020): 5–16. http://dx.doi.org/10.14529/power200301.

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The paper presents recommendations on designing an efficient mixing chamber and regulating air and steam flows in the elements of a steam-jet apparatus based on the results of multi-criteria modeling of gas-dynamic pro-cesses. The paper also reveals the possibilities to provide a greater reduction in losses, air suction into the turbine and equipment repair costs compared to the cases when individual criteria for increasing the steam turbine equipment efficiency are used. The selected calculation methods, i.e. innovative (multi-criteria) and standard (standard), have been analyzed comparativel

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29

Liu, Ying, Qimin Wang, Xiaoxiao Li, and Liming Wang. "Internal leakage analysis and experiment in hydraulic control system of steam turbine inlet valve." Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering, November 8, 2020, 095440892097311. http://dx.doi.org/10.1177/0954408920973117.

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In this paper, the transformation of steam turbine regulating system from mechanical hydraulic regulation to electro-hydraulic regulation is realized. And the internal leakage mechanism of the hydraulic control switch valve and the electro-hydraulic proportional valve in the system is analyzed. With the use of hydraulic simulation software AMESim, the mathematical model of the electro-hydraulic control system after transforming is established. The parameters of the hydraulic control switch valve and the electro-hydraulic proportional valve in the hydraulic control system of steam turbine inlet

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30

Wu, Yifan, Wei Li, Deren Sheng, Jianhong Chen, and Zitao Yu. "Fault diagnosis method of peak-load-regulation steam turbine based on improved PCA-HKNN artificial neural network." Proceedings of the Institution of Mechanical Engineers, Part O: Journal of Risk and Reliability, April 14, 2021, 1748006X2110105. http://dx.doi.org/10.1177/1748006x211010518.

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Clean energy is now developing rapidly, especially in the United States, China, the Britain and the European Union. To ensure the stability of power production and consumption, and to give higher priority to clean energy, it is essential for large power plants to implement peak shaving operation, which means that even the 1000 MW steam turbines in large plants will undertake peak shaving tasks for a long period of time. However, with the peak load regulation, the steam turbines operating in low capacity may be much more likely to cause faults. In this paper, aiming at peak load shaving, a faul

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31

CUI, Qingru, Yanqiu ZHENG, Yaohan WANG, and Deliang ZENG. "A turbine energy storage utilization evaluate method in thermal power unit." Transactions on Environment and Electrical Engineering 3, no. 1 (2019). http://dx.doi.org/10.22149/teee.v3i1.128.

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In China, the improvement of thermal power unit's operational flexibility is an important way to solve the clean energy absorption problem. The comprehensive utilization of steam turbine energy storage is an effective way to improve the load regulation performance of thermal power unit. A turbine energy storage utilization comprehensive evaluate method is presented. In the method the unit performance influence and equipment safety influence of energy storage are normalizes as a single object optimization problem. The comprehensive index calculation result is used in online optimization of stor

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32

Shi, Jiakui, Kun Yao, Jianguo Sun, et al. "The depth utilization method of condensate system’s energy-storage to improve large turbine generator units’ load response characteristic." Journal of Computational Methods in Sciences and Engineering, March 12, 2021, 1–11. http://dx.doi.org/10.3233/jcm-204843.

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Load response characteristics of high thermal power units are critical to a safe and efficient grid-connected utilization of large-scale renewable energy with strong randomness. A condensate throttling regulation was reported to improve the units variable load rate. However, it is not verified by tests in different types of units. In the paper, the influence of the storage capacity of the steam generator’s condensate system on the load response characteristics is studied for four subcritical 330 MW heating units by simulation and an experimental test. The result shows the feasibility of the co

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33

Liu, Ying, Xiaoju Yin, Yunlong Yi, Xiaoxiao Li, and Liming Wang. "Design, simulation, and experiment research on fast control system of steam turbine inlet valve." Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering, September 17, 2021, 095440892110439. http://dx.doi.org/10.1177/09544089211043971.

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In this paper, a new fast control system of steam turbine inlet valve is designed, which is composed of the fast closing system and the fast opening system. For the first time, this paper proposes that the fast closing system is designed by means of the special structure of the slide valve in an oil servo motor on the basis of the transformation of the hydraulic control system of steam turbine inlet valve. For the first time, a differential oil discharge fast opening system is designed by use of two cartridge valves. The mathematical model of electro-hydraulic fast control system is presented.

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34

Zhang, Xu, Hongyi Shao, Wenwu Zhou, Weizhe Wang, and Yingzheng Liu. "A Comprehensive Heat Transfer Study Inside a Steam Turbine Valve: Experiment, Numerical Simulation, and Simplified Model." Journal of Engineering for Gas Turbines and Power 143, no. 9 (2021). http://dx.doi.org/10.1115/1.4050858.

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Abstract In a steam turbine system, one of the main factors limiting the operational flexibility is the thermal stress associated with a high-temperature gradient within the control valves, which often leads to structural damage during frequent startup and shutdown cycles. One possible solution is to utilize an electric heating system with appropriate insulation to decrease the warm-up time. Here, an experiment and a numerical simulation were performed using a scaled turbine valve equipped with an electric heating system to understand the heat transfer process. The experiment, which was conduc

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35

Zapata, José I. "Full State Feedback Control of Steam Temperature in a Once-Through Direct Steam Generation Receiver Powered by a Paraboloidal Dish." Journal of Solar Energy Engineering 137, no. 2 (2015). http://dx.doi.org/10.1115/1.4028919.

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Once-through direct steam generation (DSG) plants convert water into superheated steam suitable for a steam turbine with a single pass of the fluid through the receiver. The control problem in such a plant is to set a feed-water mass flow that maintains a desired steam condition (e.g., temperature) while rejecting the disturbance effect of variable direct normal irradiance (DNI). A mass flow control strategy preserves the simplicity of the plant, but is challenging to implement from a control perspective, as the disturbance effect is nonlinear and difficult to measure, due to the complex physi

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