A Novel Detection Method for Three-Phase Reactive Current

2006 ◽  
Author(s):  
Zong Ming ◽  
Wang Fengxiang ◽  
Hua Funian ◽  
Sun Yidan
Keyword(s):  
Detection Method ◽  
Three Phase ◽  
Reactive Current

A New Method of Harmonic Current Detection and Control Strategy of Compensating Current

2012 ◽  
Vol 588-589 ◽  
pp. 986-989
Author(s):  
Xiang Cheng ◽  
Tie Lin Zheng ◽  
Gui Hong Feng
Keyword(s):  
Detection Method ◽  
Current Control ◽  
Phase Voltage ◽  
Power Filter ◽  
Three Phase ◽  
Reactive Current ◽  
Asymmetric Power ◽  
And Control ◽  
Current Detection ◽  
Control Accuracy

This paper puts forward and realizes a detection method, which can extract harmonic and reactive current accurately when the network exists nonideal and asymmetric power grid voltages. From the view of vector analysis, through the d-q coordinates[1,2] project transformation of the three-phase voltage and current vectors, the harmonic and reactive current extraction is realized. The compensation current adopts forecast current control, obtaining a better compensation characteristic and control accuracy .From the experimental results of 5 kVA active power filter（APF）and 150 kVA mixing filters, the feasibility and the correctness of the proposed method are proved.

Composite Islanding Detection Method of Grid-Connected Photovoltaic Generation System

2013 ◽  
Vol 339 ◽  
pp. 574-578
Author(s):  
Guo Zhao ◽  
Xue Liang Huang
Keyword(s):  
Detection Method ◽  
Islanding Detection ◽  
Generation System ◽  
Photovoltaic Generation ◽  
Three Phase ◽  
Reactive Current ◽  
Environment Simulation ◽  
Simulation Results ◽  
Pv Generation ◽  
Three Phase Inverter

Islanding detection is an important issue for grid-connected photovoltaic (PV) generation systems. The paper puts forward a new composite islanding detection method combining active current disturbance and reactive current disturbance. This islanding detection method for three-phase inverter is simulated in the Matlab/Simulink environment. Simulation results show that, when the inverter output and the load power are balanced, the new islanding detection method can detect islanding quickly with little influence on the power quality.

The Analysis of the Simulation Model on Matlab of ip -iq Detection to Positive and Negative-Sequence on the Base of Voltage

2012 ◽  
Vol 433-440 ◽  
pp. 2920-2926
Author(s):  
Wen Jun Tian ◽  
Xiao Qiang Chen ◽  
Min Xing Tian
Keyword(s):  
Simulation Model ◽  
New Method ◽  
Negative Sequence ◽  
Three Phase ◽  
Reactive Current

This paper introduces ¡p-¡q detection and analyzes the error in detecting the active and reactive current theoretically at the condition of three-phase and four-line at first. Then, it puts forward a new method at the base of ¡p-¡q detection. At last, on the base of MATLAB, the simulation of the new method is demonstrated to be correct and acceptable.

Fast reactive current detection method for single‐phase grid‐connected inverters

2016 ◽  
Vol 9 (3) ◽  
pp. 401-407 ◽  
Author(s):  
Furong Xiao ◽  
Lei Dong ◽  
Xiaozhong Liao
Keyword(s):  
Single Phase ◽  
Detection Method ◽  
Reactive Current ◽  
Current Detection

Research on the Application of New Active Inverter Technology in Battery Maintenance

2013 ◽  
Vol 448-453 ◽  
pp. 2077-2084
Author(s):  
Bing Yu Li ◽  
Ke Xu ◽  
Yun Ming Li ◽  
Xuan Yi Li
Keyword(s):  
Pulse Width Modulation ◽  
Detection Method ◽  
Power Station ◽  
Inspection Method ◽  
Discharge System ◽  
Passive Detection ◽  
Three Phase ◽  
Active Detection ◽  
And Control ◽  
Control Topology

This paper presents a discharge inspection method based on new active inverter feedback discharge after comparison with the check discharge from pure resistance of power station batteries. A new active inverter system has been developed with SPWM pulse width modulation technology, which is based on DC/DC circuitry, along with a three-phase full bridge inverter and control topology circuits. In addition, the principle for selecting the parameters of RCL elements of the system has been analyzed. This paper also presents a detection method combining active detection with passive detection for the islanding effect which exists in the grid-connected discharge system, according to the islanding effect of grid-connected discharge equipment, so as to stably discharge without interference on the grid.

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