The Application of Low Voltage Dynamic Reactive Compensation Technology of Submerged Arc Furnace in Intelligent Industrial Park

2014 ◽  
Vol 953-954 ◽  
pp. 1471-1477
Author(s):  
Qiang Li ◽  
Ning Xi Song ◽  
Qian Sun ◽  
Hao Liu ◽  
Da Peng Wang
Keyword(s):  
Reactive Power ◽  
Low Voltage ◽  
Reactive Power Compensation ◽  
Industrial Park ◽  
Dynamic Compensation ◽  
Power Dynamic ◽  
Reactive Compensation ◽  
Working Principle ◽  
Compensation Device ◽  
Submerged Arc Furnace

This paper introduces a kind of low-voltage dynamic reactive power compensation technology which is applied in intelligent industrial park. The system scheme, working principle, technical feature of the DCS-KB-2100 type low voltage power dynamic compensation device is recommended. According to the application result, the low voltage reactive power compensation technology has been greatly improved power quality, improve the power factor of the power grid. The advancement and stability of the low voltage reactive power dynamic compensation technology is verified. In the process of enterprise production, it gives full play to the role of energy saving and consumption reducing, points out the direction on the technological innovation of the industrial park electricity intellectualization, and provides a reliable technical support.

Current Detection Simulate for STATCOM Dynamic Compensation System

2010 ◽  
Vol 439-440 ◽  
pp. 378-383
Author(s):  
Ying Chen ◽  
Xiang Jie Chen
Keyword(s):  
Reactive Power ◽  
Power Transmission ◽  
Low Voltage ◽  
Reactive Power Compensation ◽  
Compensation System ◽  
Static Synchronous Compensator ◽  
Dynamic Compensation ◽  
Pressure Area ◽  
Source Current ◽  
Compensation Device

In view of low-pressure area for dynamic reactive power compensation device application present situation, a more advanced static reactive power compensation techniques was proposed that is STATCOM (Static Synchronous Compensator-STATCOM) which based on the modern power electronic technology, and it applied to the low-voltage dynamic reactive power compensation area, developed a new and more advanced low-voltage dynamic reactive power compensation device. In this paper, STATCOM compensation system simulation model was established in MATLAB6.5, futher to study its real-time compensation. Theory analyze and simulation results indicate that compare with static capacitor compensation，dynamic compensation achieved zero phase angle between power source current and voltage on rating frequency，demand for power supply rating power is reduced and power transmission performance is ensured.

The Application of S7-200 PLC Reactive Compensation Device in Small Substation

2012 ◽  
Vol 479-481 ◽  
pp. 1476-1480
Author(s):  
Qing He Chu ◽  
Wen Si Cao ◽  
Zhen Nie
Keyword(s):  
Reactive Power ◽  
Control Method ◽  
High Reliability ◽  
Reactive Power Compensation ◽  
Control Device ◽  
Reactive Compensation ◽  
Reconstruction Project ◽  
Compensation Device ◽  
And Control

In the present rural power grid reconstruction project ,according to the problems of capacitor reactive power compensation in rural small substation. Take a small substation for instance, according to its operation and control method, set the criterion of the capacitor bank switching. A new high reliability, flexible reactive power compensation control device based on s7-200 PLC is designed. It plays an important role in improving the power supply , guaranteeing the quality of voltage, reducing the loss of rural power gid.

Study on Reactive Power Compensation of Single Wind Farm

2012 ◽  
Vol 608-609 ◽  
pp. 573-578
Author(s):  
Yue Li ◽  
Bao Zhu Liu
Keyword(s):  
Wind Turbine ◽  
Power Loss ◽  
Wind Farm ◽  
Reactive Power ◽  
Reactive Power Compensation ◽  
Power Network ◽  
Generation System ◽  
Reactive Compensation ◽  
Compensation Device ◽  
Node Voltage

With the proportion of wind turbine generation system(WTGS) in power grid is highly increasing, which produces a great effect on the security and stability of the electric power network. Considering the current condition and characteristic of wind form, we built a simulation model in the imitative situation with different wind turbine outputs and different feeder types, obtained the reactive power loss of wind farm and key node voltage, as well as the ability of fixed compensation device. By using the reactive power generated from wind turbine, it can reduce capacity of the reactive compensation device in collection station, which realizes the balance of reactive power, increases the voltage stability.

Research on Methods of Reactive Compensation for Unbalanced Current in Three-Phase Four-Wire Low-Voltage Distribution System

2011 ◽  
Vol 347-353 ◽  
pp. 1156-1160
Author(s):  
Xue Ling Zhu ◽  
Wen Si Cao ◽  
Xiao Ming Zhou
Keyword(s):  
Distribution System ◽  
Reactive Power ◽  
Low Voltage ◽  
Neutral Current ◽  
Reactive Power Compensation ◽  
Current Phase ◽  
Voltage Distribution ◽  
Phase Current ◽  
Reactive Compensation ◽  
Three Phase

Different condition of unbalanced current of three-phase four-wire low-voltage distribution system is analysed in this paper. The model of unbalanced reactive power compensation is built which is fit for the three-phase four-wire system ,Using phase-to-phase or phase-to-earth capacitance or inductance can transfer active power. Control the neutral current to be zero and three-phase current balanced by means of reactive power compensation. A compensating phase judgment approach is presented, the mathematic model of calculating phase current, phase compensating capacity line current and line-to-line compensating capacity is gave. Simulation result of physical system shows that the neutral current can be controlled to be zero and the phase current balanced. It substantiate that this compensation method is valid and optimize the operation condition of loads.

Studies on the Low-Voltage Dynamic Reactive Power Compensation and Switching Control for Capacitors Device

2013 ◽  
Vol 385-386 ◽  
pp. 799-802
Author(s):  
Qiang Guo ◽  
Xiao Lan Xie ◽  
Yang Li ◽  
Xin Yu Chen
Keyword(s):  
Intelligent Control ◽  
Reactive Power ◽  
Low Voltage ◽  
Reactive Power Compensation ◽  
Capacitor Switching ◽  
Access System ◽  
Reactive Compensation ◽  
Active And Reactive Power ◽  
Intelligent Technology ◽  
Zero Voltage

This paper is for the problems of the 400V low voltage power capacitor reactive power compensation and for the problems existing in the transient process, resuming the principle of low-voltage capacitor intelligent technology and its implementation briefly. Propose a synchronization of reactive compensation capacitor switching on-off control system based on the micro controller and adaptive control. Real-time monitoring system is used to access system active and reactive power changes in order to extract the zero voltage signals; intelligent control algorithm is used to realize the intelligence of capacitor reactive power compensation on-spot and cutting, which greatly reduce the over-voltage and flow phenomenon produced by the capacitor in the cutting process. The result checked by actual measured shows that the device is stable, reliable, and can be effective to on-site system reactive power compensation and realize intelligent cutting.

Mechanism of Large Scale Cascading Trip-Off of Wind Turbine Generators

2013 ◽  
Vol 724-725 ◽  
pp. 485-490 ◽  
Author(s):  
Ling Zhou ◽  
Xiao Fang Song ◽  
Hai Bo Xu ◽  
Kang Chang ◽  
Ji Chen Li ◽  
...  
Keyword(s):  
Wind Turbine ◽  
Large Scale ◽  
Wind Farm ◽  
Reactive Power ◽  
Low Voltage ◽  
Reactive Power Compensation ◽  
Turbine Generators ◽  
Wind Turbine Generators ◽  
Compensation Device ◽  
Doubly Fed

This paper analyses the mechanism of large scale cascading trip-off failures of wind turbine generators in China, focuses on the reasons of trip-off caused by overvoltage. It analyses the model of Doubly Fed Induction Generation (DFIG) and builds a model of a wind farm that is composed of Doubly Fed Induction generators in DIgSILENT. The wind farm A with capacity of 175MW and wind farm B with capacity of 175MW is accessed to the nine bus system. The simulation reproduces the processes of the cascading trip-off of wind turbine generators caused by undervoltage and overvoltage. The trip-off caused by undervoltage is due to the lack of Low Voltage Ride Through (LVRT). And that the capacitive reactive power compensation device is not timely removed leads to a large surplus of reactive power, then the voltage rises, so the wind turbine generators trip off because of overvoltage. By setting the contrast scenario, the result shows that if capacitive reactive power compensation device is promptly removed after the loss of a large amount of active power, the wind turbine generators will not trip off because of overvoltage.

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