scholarly journals A Control Method of a Three-Phase Four-Wire Instantaneous-Reactive-Power Compensator with a Time-Variant Conductance Model

1999 ◽  
Vol 119 (2) ◽  
pp. 262-263
Author(s):  
Toshiya Ohnuki ◽  
Osamu Miyashita
Keyword(s):  
Reactive Power ◽  
Control Method ◽  
Three Phase ◽  
Instantaneous Reactive Power ◽  
Reactive Power Compensator

scholarly journals Modeling and control of a hybrid DC/DC/AC converter to transfer power under different power management strategies

2021 ◽  
Vol 12 (3) ◽  
pp. 1620
Author(s):  
Amin Alizadeh Asl ◽  
Ramin Alizadeh Asl
Keyword(s):  
Reactive Power ◽  
Control Method ◽  
Proper Time ◽  
Management Strategies ◽  
Additional Advantage ◽  
Modeling And Control ◽  
Phase Inverter ◽  
Three Phase ◽  
Three Phase Inverter ◽  
Generation Power

<span>A hybrid DC/DC/AC converter connected to the grid without a three-phase transformer is controlled. The decentralized control method is applied to the hybrid DC-DC converter such that the maximum power of PV flows to the grid side. This controller must charge and discharge the battery at the proper time. It must also regulate DC-link voltage. An additional advantage of the proposed control is that the three-phase inverter does not need a separate controller such as PWM and SPWM. A simple technique is used for creating the desired phase shift in the three-phase inverter, which makes the active and reactive power of the inverter controllable. A new configuration is also proposed to transmit and manage the generation power of PV. In this<br />scheme, the battery and fuel cell are employed as an auxiliary source to manage the generation power of PV. Finally, a real-time simulation is performed to verify the effectiveness of the proposed controller and system by considering the real characteristics of PV and FC.</span>

A Novel Control Strategy for Three-Phase Four-Wire STATCOM

2012 ◽  
Vol 516-517 ◽  
pp. 1722-1727 ◽  
Author(s):  
Wei Jun Yun ◽  
Gang Yao ◽  
Li Dan Zhou ◽  
Chen Chen ◽  
Jun Min Pan
Keyword(s):  
Control Strategy ◽  
Power Distribution ◽  
Distribution System ◽  
Reactive Power ◽  
Control Method ◽  
Loop Control ◽  
Power Distribution System ◽  
Imbalance Problem ◽  
Three Phase ◽  
Close Loop Control

Nowadays Static Synchronous Compensator (STATCOM) has gradually become one of the representative techniques in the field of dynamic reactive power compensation in the power distribution system. This paper analyzed the topology and the voltage imbalance problem of the up and down capacitors on DC side of the three-phase four-wire STATCOM. In allusion to the imbalance problem of neutral point, a novel control strategy based on the control of zero-sequence current was proposed. By the triple close-loop control strategy, the STATCOM can achieve great control accuracy and dynamic performance. Simulation result proves that the proposed control method is effective.

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