scholarly journals Structural-and-Parametric Optimization of Automatic Control System for Power Units of 300 MW in Wide Range of Load Variations

2019 ◽  
Vol 62 (5) ◽  
pp. 469-481 ◽  
Author(s):  
K. I. Artsiomenka
Keyword(s):  
Control System ◽  
Power Plant ◽  
Automatic Control ◽  
Automatic Control System ◽  
Power Plants ◽  
Parametric Optimization ◽  
Load Curve ◽  
Basic Part ◽  
Daily Schedule ◽  
Electric Loads

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 part of the schedule of electric loads was covered by combined heat and power plants (CHP) and by mini-CHP (which are the least maneuverable of the power plants), the semi-peak part of it–by local condensing power plants (Lukoml’skaya GRES and Berezovskaya GRES), the peak part–by import electric energy from neighboring power systems. However, this year the first unit of the Belorussian NPP will be put into operation, while the second one–in 2020. After the launch of the Belorussian NPP, it will cover basic part of load curve; CPPs will cover the semi-peak part, while the peak part of load curve will be covered by local condensing power plants. Correspondingly, due to the alteration of the structure of daily schedule of electric loads of the Belarusian power system, it is necessary to improve the efficiency of power units of Lukoml’skaya GRES as well as of the entire Lukoml’skaya GRES in general. This can be achieved with the help of the method of parametric optimization of the typical ACSPU proposed in the present paper. As a result, the quality of control of power and pressure upstream of the turbine will be improved; the flow of fuel will be reduced, as well as the turbine regulation valve displacement; environmental performance of entire power plant will be improved, too. The proposed technique has been confirmed by the results of computer simulation of transient processes in the automatic control system under external and internal disturbances.

Automatic Regulating System Model of Thermal Power Plant Based on Single Loop Feedback Control

2014 ◽  
Vol 543-547 ◽  
pp. 580-584
Author(s):  
Gui Qiu Su ◽  
Chao Zhang
Keyword(s):  
Control System ◽  
Power Plant ◽  
Automatic Control ◽  
Production Process ◽  
Automatic Control System ◽  
Thermal Power Plant ◽  
Thermal Power ◽  
System Model ◽  
Single Loop ◽  
Loop Feedback

The production process of the thermal power plant is transferring primary energy to secondary energy. Loss of energy is quite large for coal machine. When using air supply machine and other boiler auxiliary equipments, saving energy, reducing energy consumption is an important way to reduce the cost. This paper first analyzes the basic principle of energy transformations generation field and principle characteristics of thermal automatic control system during the production process. On the basis of energy saving and low cost framework, according to the single loop feedback construction, we establish automatic control system model of thermal power plant. Through comprehensive cloud generator we do simulation on thermal power enterprises, the result is significant. It shows that this model can provide scientific theoretical basis for the operation mode of power generation enterprises in a certain degree.

scholarly journals Improving the ship's power plant automatic control system by using a model-oriented decision support system in order to reduce accident rate under the transitional and dynamic modes of operation

2021 ◽  
Vol 3 (2 (111)) ◽  
pp. 57-66
Author(s):  
Igor Voytetsky ◽  
Taisiya Voytetskaya ◽  
Leonid Vyshnevskyi ◽  
Igor Kozyryev ◽  
Oksana Maksymova ◽  
...  
Keyword(s):  
Control System ◽  
Decision Support ◽  
Power Plant ◽  
Decision Support System ◽  
Automatic Control ◽  
Automatic Control System ◽  
Support System ◽  
Accident Rate ◽  
Support Unit ◽  
Operating Modes

This paper proposes a method to improve the performance of a ship's power plant by reducing accidents within it under transitional operating modes. The method is based on decreasing the number of service personnel errors by using a model-oriented decision support system. In order to implement the proposed method, the structure of the system of automatic control of the ship's power plant has been improved. Such an improvement of the control system implied the integration of a modeling unit and a decision support unit into its structure. The modeling unit makes it possible to predict values of the controlled parameters under a transition mode of operation before they actually appear in the system as a result of the operator's actions. A mathematical model of the automatic control system under transitional operating modes has been built for this unit. In order to implement the decision support unit, a method has been devised to formalize the task of managing the power plant under transitional operating modes. The method essentially involves modeling a transitional operating regime, followed by an evaluation of the results based on regulatory requirements and an empirical criterion for assessing the quality of enabling the diesel generators to work in parallel. In addition, a method has been developed for the decision support unit to reduce the accident rate and improve performance with the help of a mathematical apparatus of fuzzy inference, fuzzy logic, and fuzzy sets. Transitional operating regimes resulting from actual erroneous operator actions during ship flights were investigated. As a result of using the proposed system, the power plant performance increases

scholarly journals PARAMETRIC OPTIMIZATION OF AN AUTOCLAVE AUTOMATIC CONTROL SYSTEM WITH TWO PID-NEURAL REGULATORS

2017 ◽  
Vol 21 (4) ◽  
pp. 67-74
Author(s):  
Mikhail Dunaev ◽  
◽  
Innokentiy Igumnov ◽  
Dmitriy Kirgin ◽  
Nikolai Kutsyi ◽  
...  
Keyword(s):  
Control System ◽  
Automatic Control ◽  
Automatic Control System ◽  
Parametric Optimization

A Method for Recognizing a Load Curve Trendfor Using in the Power Transformer Disconnection Automatic Control System

2018 ◽  
Vol 10 (10) ◽  
pp. 20-29
Author(s):  
Aleksandr L. KULIKOV ◽  
◽  
Mikhail V. SHARYGIN ◽  
Anton A. VOROSHILOV ◽  
◽  
...  
Keyword(s):  
Control System ◽  
Automatic Control ◽  
Automatic Control System ◽  
Power Transformer ◽  
Load Curve

Parametric optimization of a marine DC motor rotational speed automatic control system

2021 ◽  
Vol 4 ◽  
pp. 22-30
Author(s):  
Aleksandr Bordug ◽  
Aleksandr Zheleznyak
Keyword(s):  
Control System ◽  
Automatic Control ◽  
Time Constant ◽  
Automatic Control System ◽  
Rotational Speed ◽  
Parametric Optimization ◽  
Dc Motor ◽  
Process Time ◽  
Motor Speed ◽  
System Parameters

DC motor speed control can be done either manually or by using an automatic controlling tool. In order to perform parametric optimization of a DC motor rotational speed automatic control system, we have developed a simplified methodology. The said methodology is able to obtain a transfer function for an automatic control system being based on several initially given system parameters. It is a tree-step way according to the research goals. We offer model patterns where parameters can be designated. Time constant for a PI controller is being presented by a process time constant for a controlled DC motor for the purpose of this particular research.

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