The Fuzzy PI Control for the DSTATCOM Based on the Instantaneous Power Balance

2013 ◽  
Vol 648 ◽  
pp. 357-360
Author(s):  
Deng Xiang Yang ◽  
Guang Yao Zhu ◽  
Qun Feng Zhu
Keyword(s):  
Control Strategy ◽  
Reactive Power ◽  
Voltage Control ◽  
Access Point ◽  
Public Access ◽  
Power Balance ◽  
Pi Control ◽  
Voltage Control Strategy ◽  
Instantaneous Power ◽  
Direct Voltage

Distribution Static Synchronous Compensator (DSTATCOM) to the public through the connection point into the reactive power can adjust the voltage of public access point, so as to meet the voltage quality. First of all papers DSTATCOM system in accordance with the instantaneous power balance theory derived DSTATCOM voltage used to control the direct voltage control strategy. In the control strategy without current detection circuit with traditional cascade control, compared with the control is simple, the advantages of fast response. And voltage control strategy for the direct control of the controller by the system parameters impact the performance of larger defects, a direct voltage DSTATCOM fuzzy PI control strategy, so that the instantaneous power balance in accordance with the direct voltage control has better control performance.

The reactive power voltage control strategy of PV systems in low-voltage string lines

2017 ◽  
Author(s):  
Feng Zhang ◽  
Xiaolong Guo ◽  
Xiqiang Chang ◽  
Guowei Fan ◽  
Lianger Chen ◽  
...  
Keyword(s):  
Control Strategy ◽  
Reactive Power ◽  
Low Voltage ◽  
Voltage Control ◽  
Voltage Control Strategy ◽  
Pv Systems

scholarly journals Two-Tier Reactive Power and Voltage Control Strategy Based on ARMA Renewable Power Forecasting Models

Energies ◽  
2017 ◽  
Vol 10 (10) ◽  
pp. 1518 ◽  
Author(s):  
Jinling Lu ◽  
Bo Wang ◽  
Hui Ren ◽  
Daqian Zhao ◽  
Fei Wang ◽  
...  
Keyword(s):  
Control Strategy ◽  
Reactive Power ◽  
Voltage Control ◽  
Voltage Control Strategy ◽  
Forecasting Models ◽  
Renewable Power ◽  
Power Forecasting

scholarly journals A Reactive Power-Voltage Control Strategy of an AC Microgrid Based on Adaptive Virtual Impedance

Energies ◽  
2019 ◽  
Vol 12 (16) ◽  
pp. 3057
Author(s):  
Yao Liu ◽  
Lin Guan ◽  
Fang Guo ◽  
Jianping Zheng ◽  
Jianfu Chen ◽  
...  
Keyword(s):  
Distributed Generation ◽  
Control Strategy ◽  
Reactive Power ◽  
Reference Value ◽  
Voltage Control ◽  
Power Sharing ◽  
Voltage Reference ◽  
Voltage Control Strategy ◽  
Voltage Recovery ◽  
Virtual Impedance

As an effective carrier of distributed generation, a microgrid is an effective way to ensure that distributed power can be reasonably utilized. However, due to the property of line impedance and other factors in a microgrid, reactive power supplied by distributed generation units cannot be shared rationally. To efficiently improve reactive power sharing, this paper proposes a reactive power-voltage control strategy based on adaptive virtual impedance. This method changes the voltage reference value by adding an adaptive term based on the traditional virtual impedance. Meanwhile, a voltage recovery mechanism was used to compensate the decline of distributed generation (DG) output voltage in the process. MATLAB/Simulink simulations and experimental results show that the proposed controller can effectively improve the steady state performance of the active and reactive power sharing. Finally, the feasibility and effectiveness of the proposed control strategy were verified.

scholarly journals Adaptive Voltage Control of Distribution Network with High Proportion PV

2021 ◽  
Vol 252 ◽  
pp. 01033
Author(s):  
Junchao Ma ◽  
Xiaoming Huang ◽  
Boliang Lou ◽  
Xiulin Xiao ◽  
Yinlong Fan ◽  
...  
Keyword(s):  
Control Strategy ◽  
Reactive Power ◽  
Distribution Network ◽  
Voltage Control ◽  
Voltage Regulation ◽  
Extremum Seeking ◽  
Pv System ◽  
Voltage Control Strategy ◽  
Voltage Controller ◽  
Point Of Common Coupling

With the increase of grid-connected PV capacity, voltage regulation at point of common coupling by controlling the reactive power injected into the grid is available. This paper presents an adaptive voltage control strategy for distribution network with high proportion PV system. The PI gain of the voltage controller is automatically adjusted by the extremum seeking algorithm to dynamically respond to the changes of the network. The PI gains are updated online through the minimization of a cost function, which represents the voltage controller performance. Finally, a distribution network model of 5 MW photovoltaic power generation system is built in MATLAB / Simulink to verify the effectiveness of the proposed control strategy.

scholarly journals Elimination of the Impact Produced by DG Units on the Voltage Profile of Distribution Networks

2020 ◽  
Vol 2020 ◽  
pp. 1-8
Author(s):  
Saad Ouali ◽  
Abdeljabbar Cherkaoui
Keyword(s):  
Control Systems ◽  
Control Strategy ◽  
Reactive Power ◽  
Voltage Control ◽  
Distribution Networks ◽  
Total System ◽  
Voltage Profile ◽  
Voltage Control Strategy ◽  
Facts Devices ◽  
The Impact

In this paper, an alternative strategy for real-time control of active distribution network voltage is developed, not by controlling the bus voltage as in the various centralized, decentralized, and local approaches presented in literature but rather by only eliminating the impact produced by active and reactive power of distributed generation (DG) units on the voltage of all network nodes and keeping the traditional voltage control systems dealing with the same constraints of passive systems. In literature, voltage deterioration introduced by DGs has been reported as one of the main obstacles for the interconnection of large amounts of DG units to the existing networks. In this paper, the novel control strategy is based on a sensitivity formula developed to calculate the compensation needed for additional distributed flexible AC transmission system (D-FACTS) devices to push and pull the exact reactive power and to eliminate the impact produced by DGs on the network voltage profile. The criteria of the allocation of the var devices and the required network reinforcement are developed in this paper, considering all possible topology structures, and an innovative codification method is introduced to reduce the needed computation time and communication data to actualize the sensitivity coefficients and get the proposed control approach flexible with network topology reconfiguration. The risk of the conflict of the proposed control system with the traditional voltage equipment is reduced due to the fast capability of D-FACTS devices to regulate their reactive power in finer granularity. A case study of two meshed IEEE 15-bus feeders is introduced to compare the voltage behavior with and without the presence of DG units and to evaluate the total system losses. The proposed method could be used for the interconnection of the first generation units in emerging networks, which does not yet have an active voltage control strategy, as it could be used for DG units not able to be connected to existing centralized control systems and it could also be used as the principal voltage control strategy, with the extension for several neighboring units and the preservation of the traditional voltage control systems.

Sign in / Sign up

Export Citation Format

Share Document