Compassion of Voltage Control Mode and Current Control Mode for Cu-ECMP

2010 ◽  
Keyword(s):  
Voltage Control ◽  
Current Control ◽  
Control Mode ◽  
Voltage Control Mode

A Parallel Communication Power Supply Based on UC3846

2014 ◽  
Vol 513-517 ◽  
pp. 4323-4327
Author(s):  
Yong Da Wan ◽  
Ping Liu ◽  
Jing Lu ◽  
Xu Heng Bao
Keyword(s):  
Power Supply ◽  
Bridge Circuit ◽  
Voltage Control ◽  
Current Mode ◽  
Current Control ◽  
Control Circuit ◽  
Experimental Results ◽  
Control Mode ◽  
Current Mode Control ◽  
Voltage Control Mode

This paper is intended to design a parallel 50v/2A converter. The paper begins with the respective detailed working principles of PWM current control mode and voltage control mode, as well as their differences. By introducing the PWM IC UC3846 for current mode control, in order to meet the demand of duplex output, a full-bridge circuit is designed based on double chip PWM control, and the control circuit and the main circuit are explained in detail. The paper concludes with the proposal of a prototype that meets the expected experimental results.

Direct Current-Controlled Distribution Static Synchronous Compensator for Voltage Quality Improvement

2013 ◽  
Vol 648 ◽  
pp. 361-364
Author(s):  
Lei Huang ◽  
Deng Xiang Yang ◽  
Jie Tang ◽  
Qun Feng Zhu
Keyword(s):  
Quality Improvement ◽  
Direct Current ◽  
Reactive Power ◽  
Voltage Control ◽  
Current Control ◽  
Control Mode ◽  
Voltage Source ◽  
Voltage Sag ◽  
Voltage Quality ◽  
Voltage Control Mode

This paper presents a direct current-controlled static reactive power compensator (DSTATCOM) for voltage quality improvement of low-medium distribution network. The main circuit of the DSTATCOM uses VSI-SPWM structure-based voltage source inverter (VSI), and both operation of reference current and control of compensation current are realized in synchronous reference frames. The function of DSTATCOM to mitigate voltage sag and flicker, two common voltage quality problems, is discussed in detail in this paper. According to the forming way of reactive reference current, operation mode of DSTACOM are classified into current control mode and voltage control mode. And under the two operation modes the function of DSTATCOM to mitigate voltage sag and flicker under different control modes is simulated with MATLAB. The simulation results show that the current control mode is suitable for mitigating voltage flicker, while the voltage control mode for voltage sag.

scholarly journals ANALYSIS OF INVERTER FED MICROGRIDS FOR DIFFERENT MODES OF OPERATION IN MATLAB/SIMULINK

2013 ◽  
pp. 187-190
Author(s):  
SREELEKSHMI R S ◽  
SUNITHA R
Keyword(s):  
Control Strategies ◽  
Voltage Control ◽  
Current Control ◽  
Control Mode ◽  
Constant Current ◽  
Control Loops ◽  
Control Techniques ◽  
Mode Of Operation ◽  
Islanded Mode ◽  
Voltage Control Mode

This paper presents analysis of control techniques of a converter fed microgrid in grid connected mode and islanded mode of operation. Here two control strategies are discussed , one for grid connected mode and the other for islanded mode of operation. In grid connected mode of operation the DG inverter system works in constant current control mode, and provide preset power to the grid, while in islanded mode of operation the DG inverter system goes to voltage control mode. Voltage control mode is simple and has a low number of control loops.

RTDS-Based Simulate Analysis of AC Filters Switch Method in HVDC Converter for Voltage Stability

2013 ◽  
Vol 756-759 ◽  
pp. 4250-4253
Author(s):  
Xiao Jun Zhu ◽  
Tao Chen ◽  
Wei Fang ◽  
Luo Jiang Qian ◽  
Yi Yu Wen
Keyword(s):  
Voltage Stability ◽  
Power Transmission ◽  
Voltage Control ◽  
Salient Feature ◽  
Fast Response ◽  
Control Mode ◽  
Reactive Control ◽  
Voltage Level ◽  
Action Sequence ◽  
Voltage Control Mode

In most of the AC-DC hybrid power transmission system AC filters is widely applied to stabilize voltage level in addition to filter harmonic. However, the voltage stability of AC bus is greatly influenced by action sequence of switching AC filters in group. The paper presents the concept of reactive characteristics of the convertor and AC filters, using reactive and voltage control mode to switch them. The modeling, control, and principle of operation for the AC-side switching filters are described. The voltage level is controlled via regulating action of switching filters by step. The salient feature of the proposed control modes is that voltage control contributes to keep the voltage level, and reactive control has no fast response on guaranteeing voltage stability, but two methods can apply to different occasions based on the requirements of voltage stability. All analysis and control system designs are verified through building a RTDS model in a typical ±500kV power system.

Sliding Mode Control Application in Wind Energy Conversion System Using DSTATCOM

2015 ◽  
Vol 1 (1) ◽  
Author(s):  
R. S. Bajpai ◽  
Amarjeet Singh
Keyword(s):  
Sliding Mode Control ◽  
Sliding Mode ◽  
Harmonic Distortion ◽  
Voltage Control ◽  
Input Voltage ◽  
Current Control ◽  
Control Mode ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Mode Control

This paper deals with sliding mode control of converter and its application to distributed generation. Sliding mode control is used to control the voltage source converter in voltage or current control mode. Modeling and control of H bridge converter system using sliding mode control is proposed. Easily implemented sliding surfaces provide prominent dynamic characteristics against changes in the load and in the input voltage. Distribution static compensator (DSTATCOM) is used to control the voltage of the bus to which it is connected to a balance sinusoid in respect of the harmonic distortion in supply or load side. A variable wind turbine generator is used to produces a variable DC voltage which is placed as input voltage source to converter of DSTATCOM. A control strategy for grid voltage control using DSTATCOM in voltage control mode has been implemented in respect of the wind variation. The results are validated using PSCAD/EMTDC simulation studies.

Study on Direct Current Controlled Distribution Static Synchronous Compensator with Mechanical Properties Used for Improvement of Voltage Quality

2013 ◽  
Vol 387 ◽  
pp. 254-257
Author(s):  
Qun Feng Zhu ◽  
Lei Huang ◽  
Deng Xiang Yang ◽  
Guang Yao Zhu
Keyword(s):  
Direct Current ◽  
Reactive Power ◽  
Current Control ◽  
Control Mode ◽  
Voltage Source ◽  
Voltage Sag ◽  
Static Synchronous Compensator ◽  
Synchronous Reference Frame ◽  
Voltage Quality ◽  
Voltage Control Mode

A type of direct current controlled static reactive power compensator (DSTATCOM) used for improvement of voltage quality in low-medium distribution network is introduced. The main circuit of DSTATCOM consists of VSI-SPWM voltage source inverter. The extraction of reference current and the tracking control of compensator current are realized in synchronous reference frame. The function of DSTATCOM to mitigate voltage sag and flicker is presented in this paper and the control mode of DSTATCOM is discussed in detail. The function of DSTATCOM to mitigate voltage sag and flicker under different control mode is simulated with MATLAB. The simulation results shows that the current control mode is suitable for mitigating voltage flicker and the voltage control mode is suitable for mitigating voltage sag.

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