scholarly journals Optimizing drum-boiler water level control performance: A practical approach

2014 ◽  
Author(s):  
Ahmed El-Guindy ◽  
Simon Runzi ◽  
Kai Michels
Keyword(s):  
Water Level ◽  
Practical Approach ◽  
Control Performance ◽  
Level Control ◽  
Boiler Water ◽  
Drum Boiler

scholarly journals Perancangan Water Level Control Menggunakan PLC Omron Sysmac C200H Yang Dilengkapi Software SCADA Wonderware InTouch 10.5

2013 ◽  
Vol 1 (3) ◽  
Author(s):  
Indra Saputra ◽  
Lukmanul Hakim ◽  
Sri Ratna S
Keyword(s):  
Water Level ◽  
Water Levels ◽  
Feed Water ◽  
Water Tank ◽  
Level Control ◽  
Filling Process ◽  
Push Button ◽  
Boiler Water ◽  
Scada System ◽  
System Water

Feed water tank merupakan salah satu komponen pada boiler yang memiliki fungsi penting dalam menyuplai air ke boiler. Level air pada feed water tank harus tetap dijaga agar tidak terjadi kekosongan saat proses pengisian air ke boiler. Selama ini operator masih memantau secara langsung level air pada feed water tank. Sehingga diperlukan sistem otomasi water level control yang dapat membantu operator dalam mengontrol dan memantau level air pada feed water tank. Sistem otomasi water level control dikendalikan oleh PLC Omron Sysmac C200H dengan menggunakan panel push button yang terpasang pada plant atau juga dapat dikendalikan dan dimonitor melalui melalui PC menggunakan software SCADA Wonderware InTouch 10.5. Selain itu sistem otomasi menggunakan SCADA ini dilengkapi password sebagai pengaman dari orang yang tidak bertanggung jawab. Kata kunci : PLC, SCADA, water level control, feed water tank Feed water tank is one component of the boiler system which has an important function in supplying water to the boiler. Water levels in feed water tank is must be maintaned to avoid emptiness at filling process to the boiler. Previously, the operator directly to monitors water level in the feed water tank. Therefore, a control mechanisem is required to help the operators to control and monitor the water level in the feed water tank autonomously. In this system, water level is controlled by PLC Omron C200H Sysmac using the push button panel attached to the plant or also can be controlled and monitored by PC using Wonderware InTouch 10.5. In addition, SCADA system is equipped with a password to secure from irresponsible people.Key word : PLC, SCADA, water level control, feed water tank

Recommended Configuration of Boiler Drum Water Level Control and Protection System

2016 ◽  
Author(s):  
Zhelin Liu ◽  
John Michael Harris ◽  
Jichuan Liu ◽  
Shengli Yu ◽  
Mingxin Zhou
Keyword(s):  
High Pressure ◽  
Control System ◽  
Water Level ◽  
Critical Level ◽  
Protection System ◽  
Level Control ◽  
Boiler Water ◽  
Protection Systems ◽  
Boiler Drum ◽  
Gauge Glass

For a high pressure boiler above 1,400 psi (9.7 MPa), the boiler drum level Control and Protection systems serve two distinct, but complementary functions. The Control system needs to control drum level. Protection is done for safety. If the drum level reaches a critical level, the Protection system shuts down the boiler to avoid damage. One must meet ASME Boiler Code requirements, get the job done correctly, and minimize the number of instruments required. By ASME Boiler Code, one must have at least one Boiler Water Gauge Glass. How many Control instruments are needed? If a single boiler drum water level instrument is used and this instrument suffers a failure, there is a problem. Even if two instruments are used and one fails, one does not know which to trust. Logic dictates that one requires a minimum of three Control instruments. Before discussing Protection, it is good to discuss the characteristics of the instruments available:

Parameter Optimization for AP1000 Steam Generator Feedwater Control System Using Particle Swarm Optimization Algorithm

2016 ◽  
Author(s):  
Shifa Wu ◽  
Pengfei Wang ◽  
Jiashuang Wan ◽  
Xinyu Wei ◽  
Fuyu Zhao
Keyword(s):  
Particle Swarm Optimization ◽  
Control System ◽  
Water Level ◽  
Steam Generator ◽  
Parameter Optimization ◽  
Particle Swarm ◽  
Operating Conditions ◽  
Control Performance ◽  
Level Control ◽  
Swarm Optimization

The U-tube Steam Generator (UTSG) of AP1000 Nuclear Power Plant (NPP) is the crucial component transferring heat from the primary loop to the secondary loop to make steam. The UTSG of AP1000 NPP is a highly complex, nonlinear and time-varying system and its parameters vary with operating conditions. Therefore, it is difficult and challenging to well control the water level of AP1000 UTSG by tuning the PID controller parameter in a traditional way, especially when the system is undergoing a sharp transient. To achieve better control performance, the Particle Swarm Optimization (PSO) algorithm was applied for the parameter optimization of the AP1000 UTSG feedwater control system in this study. First, the mathematical model of AP1000 UTSG was established and the objective function was developed with the system constraints considered. Second, the simulation platform was built and then the simulation was conducted in MATLAB/Simulink environment. Finally, the optimized parameters were obtained and the feedwater control system with optimized parameters was simulated against that without optimized. The simulation results demonstrate that optimized parameters of AP1000 UTSG feedwater control system can significantly improve the water level control performance with smaller overshoot and faster response. Therefore, the PSO based optimization method can be applied to optimizing AP1000 UTSG feedwater control system parameters to provide much better control capabilities.

Water Level Control Embedded Fuzzy-PID and Pole-Placement Strategy

2011 ◽  
Vol 464 ◽  
pp. 43-47 ◽  
Author(s):  
Biao Yu ◽  
Hui Zhu
Keyword(s):  
Water Level ◽  
Control Strategy ◽  
Pid Controller ◽  
State Feedback ◽  
Pole Placement ◽  
Fuzzy Pid ◽  
Level Control ◽  
Complex Dynamic ◽  
Boiler Water ◽  
Fuzzy Pid Controller

Since boiler water level system is a complex dynamic system, it is difficult to obtain satisfactory control performances by using the traditional PID controller whose parameters are constant. Therefore, an intelligent fuzzy-PID controller, which can adjust the three parameters of PID in terms of the level error and the rate of lever error, is proposed. On the other hand, if knowing the relation between the closed-loop poles and the system performance, we can achieve the desired control characteristics with pole-placement approach. So, a new control strategy combined with PID controller, fuzzy logic and pole-placement design through state feedback is further proposed. The simulation results show that this control strategy has much better performances than is obtained with traditional controllers.

scholarly journals Research on Drum Water Level Control of Marine Auxiliary Boiler Based on ADRC

2018 ◽  
Vol 25 (s2) ◽  
pp. 35-41 ◽  
Author(s):  
Hui-bing Gan ◽  
Bo Lv
Keyword(s):  
Water Level ◽  
Dynamic Equation ◽  
Disturbance Rejection ◽  
Order System ◽  
Nonlinear Feedback ◽  
Level Control ◽  
Boiler Water ◽  
Control Precision ◽  
Active Disturbance Rejection ◽  
Disturbance Rejection Control

Abstract SThe active disturbance rejection control (ADRC) exhibits strong robustness and adaptability in the presence of strong interference of a large class of uncertain systems. In order to better control the water level of the auxiliary boiler drum, this paper applies the ADRC to improve its control precision, robustness and timeliness. Firstly, the change of drum water level in a large oil tanker auxiliary boiler is analyzed and the dynamic equation is established. After the mathematic changes, the dynamic equation is transformed into a two-order system. Aiming at the characteristics of nonlinear, time-varying and strong disturbance of the boiler water level control system in marine auxiliary boiler, studying the ADRC that includes tracking differentiator (TD), extended state observer (ESO), nonlinear feedback (NLSEF) and disturbance compensation of four parts. The establishment of two kinds of two-order ADRC controller to control the drum level. Through the theoretical analysis and simulation experiment test, and comparing with the cascade control strategy, the experimental results show that the active disturbance rejection controller satisfies the steady state response index of the system, and has good timeliness and accuracy to the control of water level of the drum.

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