Design and Analysis of a Hybrid Backup Power System for a High-Rise and High-Speed Elevator

2008 ◽  
Author(s):  
Leon Zhou ◽  
Zuomin Dong ◽  
Sibo Wang ◽  
Zhiping Qi
Keyword(s):  
Power System ◽  
High Speed ◽  
High Rise

scholarly journals Modelling and Simulation of SCADA and PLC System for Power System Protection Laboratory

2021 ◽  
Vol 17 (1) ◽  
pp. 19-25
Author(s):  
Ayesha Faryal ◽  
Farhana Umer ◽  
Muhammad Amjad ◽  
Zeeshan Rashid ◽  
Aoun Muhammad
Keyword(s):  
Control System ◽  
Power System ◽  
High Speed ◽  
Power System Protection ◽  
Protection Scheme ◽  
Intelligent Decision Making ◽  
System Protection ◽  
Scada System ◽  
Ground Fault ◽  
Intelligent Decision

Abstract The protection of power system is an essential trait in a huge network to efficiently detect and isolate the sections undergoing faults or abnormal behaviour. The key components of a protection scheme include circuit breakers, relays, switchgears and fuses which employ communication from one station to another to achieve high-speed tripping. The automation of these components at the laboratory level using programmable logic controller (PLC) along with supervisory control and data acquisition (SCADA) system owns paramount importance for intelligent decision making, sensing, actuating, monitoring and maintaining the record in the host server. This paper discusses such a technique for conventional power system protection laboratory at a new level of development to promote a control system through PLC and SCADA. The control system has indication of over and under values of voltage, load and frequency, which can trigger malfunctioning of equipment and must be rectified. Furthermore, ground fault and inverse current indication are added to the system for monitoring and controlling purposes. The proposed system enhances the efficiency and safety of the expensive equipment and the personnel to the next level and also introduces new standards of automated protection schemes for modern technical institutes.

scholarly journals Analysis of Construction Technology of High-rise Residential Building Engineering

2017 ◽  
Vol 1 (3) ◽  
Author(s):  
Qiu Hao
Keyword(s):  
High Speed ◽  
Residential Buildings ◽  
Residential Building ◽  
Management Control ◽  
Building Construction ◽  
Construction Technology ◽  
Land Resources ◽  
High Rise ◽  
Social Economic Development ◽  
Building Engineering

Nowadays, under the  situation  of  the accelerating  process  of urbanization,  our  social economic development has also been leaps and bounds and  the  corresponding construction industry has also been high speed developed. Our country in the field of land resources still insist on a solid  strict  management control, therefore, in this context,it will inevitably lead the land resources to face with a tense situation which has become a great test forhigh-rise residential building construction as it appears repeatedly.  Normally, high-rise residential buildings have the characteristics of limited operating surface, high investment  cost,  long construction period and high requirements of construction technology. In view of this, this paper mainly analyzes the high-rise residential building construction technology.

Development of a new adaptive LQG system generator for high-speed damping control techniques of power system oscillation

2003 ◽  
Vol 142 (3) ◽  
pp. 30-40 ◽  
Author(s):  
Tsutomu Michigami ◽  
Masaru Terasaki ◽  
Nobuyoshi Sasazima ◽  
Kunitake Hayashi ◽  
Takashi Okamoto
Keyword(s):  
Power System ◽  
High Speed ◽  
System Generator ◽  
Control Techniques ◽  
Damping Control

Design of a Scaled Model for a High Rise, High Speed Elevator

2001 ◽  
Author(s):  
W. D. Zhu ◽  
L. J. Teppo
Keyword(s):  
High Speed ◽  
Scaling Laws ◽  
Sufficient Accuracy ◽  
Model Parameters ◽  
Minimal Effect ◽  
Model Design ◽  
Scaled Model ◽  
Lateral Dynamics ◽  
High Rise ◽  
Dimensionless Groups

Abstract A novel scaled model is developed to simulate the linear lateral dynamics of a hoist cable with variable length in a high rise, high speed elevator. The dimensionless groups used to formulate the scaling laws are derived through dimensional analysis. The model parameters are selected based on the scaling laws subject to space and hardware constraints. It is demonstrated that while it is almost impossible to obtain a fully scaled model unless the model is extremely tall, a reasonably sized model can be constructed with sufficient accuracy. The scaling laws that are not satisfied can be rendered to have a minimal effect on the scaling between the model and prototype. In conjunction with the model design, an analysis of model tension in a closed cable loop is developed. A new movement profile, which ensures a continuous jerk function during the entire period of motion, is derived. Practical considerations that occur in the design of the model are addressed. The methodology can be used to investigate the vibration of a very long cable in other applications.

Standing Phase Angle Reduction Based on a Wide Area Monitoring System Using Genetic Algorithm

2010 ◽  
Vol 11 (3) ◽  
Author(s):  
Saber Nourizadeh ◽  
Ali Mohammad Ranjbar ◽  
Mahmoud R. Pishvaie ◽  
Morteza Sadeghi
Keyword(s):  
Genetic Algorithm ◽  
Power System ◽  
Monitoring System ◽  
Phase Angle ◽  
High Speed ◽  
Test System ◽  
Wide Area ◽  
Wide Area Monitoring ◽  
Novel Approach ◽  
Area Monitoring

During power system restoration, it is necessary to check the phase angle between two buses before closing circuit breakers to connect a line between them. A novel approach for reducing large standing phase angle (SPA) based on Genetic Algorithm (GA) is presented in this paper. The proposed approach starts with a state estimation on Wide Area Monitoring System (WAMS) data measurements and considering power system operation and angular stability constraints, seeks an optimal control action scenario for reducing SPA. Since these constraints are evaluated based on WAMS data, the presented approach is considerably high speed and accurate. As an optimization problem, objective function of the proposed approach is to minimize variation from the current state of the power system. Simulation results on the IEEE 118 bus test system clearly show efficiency of the approach.

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