Application of an automation system and a supervisory control and data acquisition (SCADA) system for the optimal operation of a membrane adsorption hybrid system

2006 ◽  
Vol 53 (4-5) ◽  
pp. 179-184 ◽  
Author(s):  
P.J. Smith ◽  
S. Vigneswaran ◽  
H.H. Ngo ◽  
H.T. Nguyen ◽  
R. Ben-Aim
Keyword(s):  
Data Acquisition ◽  
Hybrid System ◽  
Supervisory Control ◽  
Closed Loop ◽  
Optimal Operation ◽  
Automation System ◽  
Closed Loop Control ◽  
Loop Control ◽  
Scada System ◽  
Scada Systems

The application of automation and supervisory control and data acquisition (SCADA) systems to municipal water and wastewater treatment plants is rapidly increasing. However, the application of these systems is less frequent in the research and development phases of emerging treatment technologies used in these industries. This study involved the implementation of automation and a SCADA system to the submerged membrane adsorption hybrid system for use in a semi-pilot scale research project. An incremental approach was used in the development of the automation and SCADA systems, leading to the development of two new control systems. The first system developed involved closed loop control of the backwash initiation, based upon a pressure increase, leading to productivity improvements as the backwash is only activated when required, not at a fixed time. This system resulted in a 40% reduction in the number of backwashes required and also enabled optimised operations under unsteady concentrations of wastewater. The second system developed involved closed loop control of the backwash duration, whereby the backwash was terminated when the pressure reached a steady state. This system resulted in a reduction of the duration of the backwash of up to 25% and enabled optimised operations as the foulant build-up within the reactor increased.

The Design of Monitoring System in Large Hydraulic Press Aiming at the Precise Closed-Loop Control

2014 ◽  
Vol 989-994 ◽  
pp. 3062-3069
Author(s):  
Heng Du ◽  
Bin Huang ◽  
Lin Wang ◽  
Shu Mei Chen
Keyword(s):  
Data Acquisition ◽  
Monitoring System ◽  
High Speed ◽  
Closed Loop ◽  
Hydraulic Press ◽  
Signal Acquisition ◽  
Closed Loop Control ◽  
Repeated Testing ◽  
Loop Control ◽  
The Status

In the research and development of the precise closed-loop control system in large hydraulic press, the touch screen and PLC are frequently applied to design, debug and test for the system. Though a better closed-loop control characteristic can be acquired after repeated testing by this way, the comprehensive state data of hydraulic press are unable to get, which leads to a long research cycle and also restricts the maintenance and upgrade with the equipment in the later period. In order to obtain the whole state information of hydraulic press easily and effectively, a monitor system of precise closed-loop control in large hydraulic press is designed. Based on reasonable cooperation of sensors and high-speed data-acquisition card, high-speed and precise signal acquisition is realized. In addition, data-acquisition software program is designed base on LabVIEW, it can achieve the functions of collecting, storing, displaying and analyzing data. Through the real measuring and analyzing on a certain large ceramic hydraulic press, the status of key parameters can be acquired effectively during the whole pressing process. So the monitoring system supplies the significant data basis to the precise closed-loop control, accelerates the design and development of high characteristic precise closed-loop control and also strongly supports to the maintenance and upgrade with the equipments in the later period.

scholarly journals Sensors Data Analysis in Supervisory Control and Data Acquisition (SCADA) Systems to Foresee Failures with an Undetermined Origin

Sensors ◽  
2021 ◽  
Vol 21 (8) ◽  
pp. 2762
Author(s):  
F. Javier Maseda ◽  
Iker López ◽  
Itziar Martija ◽  
Patxi Alkorta ◽  
Aitor J. Garrido ◽  
...  
Keyword(s):  
Data Acquisition ◽  
Supervisory Control ◽  
Detection Algorithm ◽  
The Novel ◽  
Industrial Internet Of Things ◽  
Machine Availability ◽  
Scada System ◽  
Industrial Internet ◽  
Scada Systems

This paper presents the design and implementation of a supervisory control and data acquisition (SCADA) system for automatic fault detection. The proposed system offers advantages in three areas: the prognostic capacity for preventive and predictive maintenance, improvement in the quality of the machined product and a reduction in breakdown times. The complementary technologies, the Industrial Internet of Things (IIoT) and various machine learning (ML) techniques, are employed with SCADA systems to obtain the objectives. The analysis of different data sources and the replacement of specific digital sensors with analog sensors improve the prognostic capacity for the detection of faults with an undetermined origin. Also presented is an anomaly detection algorithm to foresee failures and to recognize their occurrence even when they do not register as alarms or events. The improvement in machine availability after the implementation of the novel system guarantees the accomplishment of the proposed objectives.

scholarly journals Harmonic Mitigation of PV Based Grid-Connected Hybrid System using ANFIS

2019 ◽  
Vol 9 (1) ◽  
pp. 2855-2860
Keyword(s):  
Hybrid System ◽  
Control Strategy ◽  
Closed Loop ◽  
Reactive Power ◽  
Pi Controller ◽  
Active Power ◽  
Closed Loop Control ◽  
Source Condition ◽  
Loop Control ◽  
Composite Control

Deriving quality power is the vital problem in power system network. The main focus of the paper is to reduce the power quality issues mainly the reduction of harmonics using source compensation technique. This paper proposes a grid integrated hybrid system with ANFIS. This hybrid system mainly consists of PV panel, inverters, fuel cell, batteries and filters. Based on working principle and characteristics of the proposed hybrid system, the composite control strategy about active power, reactive power and harmonic suppression is proposed. The composite control strategy are of two loops ie., a single closed-loop control response active power and reactive power, double closed-loop control responses harmonics. Both balanced source condition and unbalanced source condition for three phase system are developed by Simulink model. The balanced and unbalanced source performance is done by using ANFIS. PI controller and ANFIS are compared with their Simulink results. Simulation results shows the performance of ANFIS is better than PI controller.

Terahertz Time-Domain Spectroscopy Rapid Data Acquisition Based on Closed-Loop Control

2015 ◽  
Vol 52 (4) ◽  
pp. 040401
Author(s):  
黄战华 Huang Zhanhua ◽  
胡子晓 Hu Zixiao ◽  
何明霞 He Mingxia ◽  
龙宁波 Long Ningbo ◽  
刘洋 Liu Yang
Keyword(s):  
Data Acquisition ◽  
Time Domain ◽  
Closed Loop ◽  
Closed Loop Control ◽  
Terahertz Time Domain Spectroscopy ◽  
Time Domain Spectroscopy ◽  
Loop Control ◽  
Rapid Data Acquisition

scholarly journals The trends of supervisory control and data acquisition security challenges in heterogeneous networks

2021 ◽  
Vol 22 (2) ◽  
pp. 874
Author(s):  
M. Agus Syamsul Arifin ◽  
Susanto Susanto ◽  
Deris Stiawan ◽  
Mohd Yazid Idris ◽  
Rahmat Budiarto
Keyword(s):  
Data Acquisition ◽  
Heterogeneous Networks ◽  
Supervisory Control ◽  
Detection System ◽  
Traffic Monitoring ◽  
Security Issues ◽  
Scada Security ◽  
Scada System ◽  
Proposed Model ◽  
Scada Systems

<p>Supervisory control and data acquisition (SCADA) has an important role in communication between devices in strategic industries such as power plant grid/network. Besides, the SCADA system is now open to any external heterogeneous networks to facilitate monitoring of industrial equipment, but this causes a new vulnerability in the SCADA network system. Any disruption on the SCADA system will give rise to a dangerous impact on industrial devices. Therefore, deep research and development of reliable intrusion detection system (IDS) for SCADA system/network is required. Via a thorough literature review, this paper firstly discusses current security issues of SCADA system and look closely benchmark dataset and SCADA security holes, followed by SCADA traffic anomaly recognition using artificial intelligence techniques and visual traffic monitoring system. Then, touches on the encryption technique suitable for the SCADA network. In the end, this paper gives the trend of SCADA IDS in the future and provides a proposed model to generate a reliable IDS, this model is proposed based on the investigation of previous researches. This paper focuses on SCADA systems that use IEC 60870-5-104 (IEC 104) protocol and distributed network protocol version 3 (DNP3) protocol as many SCADA systems use these two protocols.</p>

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