A high-performance voltage sag detection algorithm for a Dynamic Voltage Restorer

2017 ◽  
Author(s):  
Javier Roldan-Perez ◽  
Aurelio Garcia-Cerrada ◽  
Miguel Ochoa-Gimenez ◽  
Juan Luis Zamora-Macho
Keyword(s):  
High Performance ◽  
Detection Algorithm ◽  
Voltage Sag ◽  
Dynamic Voltage Restorer ◽  
Voltage Restorer ◽  
Voltage Sag Detection ◽  
Dynamic Voltage

scholarly journals A Fast and Accurate Method for Power System Voltage Sag Detection

2020 ◽  
Vol 16 (1) ◽  
pp. 78-84
Author(s):  
Adnan Diwan ◽  
Khalid Abdulhassan ◽  
Falih Alnahwi
Keyword(s):  
Accurate Method ◽  
Voltage Sag ◽  
Dynamic Voltage Restorer ◽  
Detection Techniques ◽  
Voltage Restorer ◽  
Detection Circuit ◽  
Different Types ◽  
Voltage Sag Detection ◽  
Dynamic Voltage ◽  
Speed And Accuracy

In order to mitigate the effect of voltage sag on sensitive loads, a dynamic voltage restorer (DVR) should be used for this purpose. The DVR should be accompanied with a fast and accurate sag detection circuit or algorithm to determine the sag information as quickly as possible with an acceptable precision. This paper presents the numerical matrix method as a distinctive candidate for voltage sag detection. The design steps of this method are demonstrated in detail in this work. The simulation results exhibit the superiority of this technique over the other detection techniques in term of the speed and accuracy of detection, simplicity in implementation, and the memory size. The results also accentuate the recognition capability of the proposed method in distinguishing different types of voltage sag by testing three different voltage sag scenarios.

Study on the Feeder Selection Method for 10kV Regional Compensation Type Dynamic Voltage Restorer

2014 ◽  
Vol 615 ◽  
pp. 290-297
Author(s):  
Hua Ying Zhang ◽  
Sen Jing Yao ◽  
Zheng Guo Zhu ◽  
Jun Wei Cao ◽  
Yang Liu
Keyword(s):  
Compensation Effect ◽  
Detection Algorithm ◽  
Selection Method ◽  
Modulation Method ◽  
Voltage Sag ◽  
Pulse Modulation ◽  
Dynamic Voltage Restorer ◽  
Voltage Restorer ◽  
Dynamic Voltage ◽  
Load Types

This paper proposes the designing of regional compensation type Dynamic Voltage Restorer (DVR), and the topology of main circuit, the detection algorithm for voltage sag, the calculation method of reference voltage and pulse modulation method. Based on the different load types of the target substation and the sensitivity to voltage sags, the selection principle of the location of compensation line for regional compensation DVR is proposed, and the realization of substation feeder selection method is illustrated by taking a substation as an example. The compensation effect of the DVR under different fault types are simulated, and the validity and rationality of the designing are verified.

Improved Voltage Sag Detection Method and Optimal Design for the Digital Low-Pass Filter in Small UAVs

2015 ◽  
Author(s):  
Shuiqiang Pei ◽  
Xiaoguang Hu ◽  
Guofeng Zhang ◽  
Li Fu
Keyword(s):  
Real Time ◽  
Detection Method ◽  
Voltage Sag ◽  
Dynamic Voltage Restorer ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Voltage Restorer ◽  
Voltage Sag Detection ◽  
Low Pass ◽  
Dynamic Voltage

Real-time and accurate detection of the voltage sag characteristics is the premise to achieve dynamic voltage restorer compensation. An improved αβ-dq transformation detection method is presented for the limitations of traditional detection methods. In this method, the α-axis component of the αβ static coordinate system is deduced according to the single-phase voltage. The virtual β-axis component is constructed from the derivative of the α-axis component. The magnitudes, duration, phase-angle jump of the voltage sag are detected quickly and accurately by αβ-dq transformation and low-pass filter. The original data is real-time, which ensures faster detection response speed and reduces the computation greatly. In addition, an optimization design method for digital low-pass filter is presented against the contradictions existing in real-time and filtering effect of common low-pass filter. This adopts inertial filter to improve the characteristics of Butterworth low-pass filter and enable them to better adapt to the needs of the voltage sag detection thus improving the real-time quality and precision of dynamic voltage restorer.

Mitigation of Unbalanced Voltage Sag/Swells Using Dynamic Voltage Restorer Based on Super Capacitor

2015 ◽  
Vol 2 (4) ◽  
pp. 1-6
Author(s):  
K. Venkateswarlu ◽  
◽  
B. Ashwin Kumar ◽  
N. Srinivas ◽  
V. Mallikarjuna Rao ◽  
...  
Keyword(s):  
Voltage Sag ◽  
Super Capacitor ◽  
Dynamic Voltage Restorer ◽  
Voltage Restorer ◽  
Unbalanced Voltage ◽  
Dynamic Voltage
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