#power system control

[firstoccupier]

The Philippine Power Grid: Frequency Control, System Inertia, and Stability Margins

By Cliff Potts, CSO, and Editor-in-Chief of WPS News Baybay City, Leyte, Philippines — June 2, 2026 Introduction: Frequency Is the Grid’s Most Honest Measurement Voltage problems often attract attention because lights dim or equipment trips. Frequency instability, by contrast, operates silently until protection systems intervene. Yet frequency is the most immediate indicator of power system…

The Philippine Power Grid: Frequency Control, System Inertia, and Stability Margins

[ijtsrd]

Distributed Power Flow Controller by using Modern Facts Devices

by Shaik Abid | C. Dinakaran "Distributed Power Flow Controller by using Modern Facts Devices" 

Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-4 | Issue-1 , December 2019, 

URL: https://www.ijtsrd.com/papers/ijtsrd29617.pdf  

Paper URL: https://www.ijtsrd.com/engineering/electrical-engineering/29617/distributed-power-flow-controller-by-using-modern-facts-devices/shaik-abid

arts journal, paper publication in management, call for paper life sciences

This Paper deals with a new concept within the Flexible AC Transmission System FACTS family, called Distributed Power Flow Controller DPFC , is the most powerful FACTS device, which can simultaneously control all the parameters of the system like the line impedance, the transmission angle, and bus voltage. The DPFC is derived from the Unified Power Flow Controller UPFC . But there is a drawback in UPFC that is the components of the UPFC handle the voltages and currents with high rating, therefore the total cost of the system is high. Due to the common dc link interconnection, a failure that happens at one converter will influence the whole system. To achieve the required reliability for power systems, bypass circuits and redundant backups backup transformers, capacitor Banks etc. are needed, which on other hand, increase the cost. Accordingly, the UPFC has not been commercially used, even though it has the most advanced control capabilities. DPFC uses one shunt and several series converters. The shunt converter is similar as a STATCOM, the series converter of the DPFC employs the Distributed FACTS concept, which uses multiple small single phase converters instead of one large size converter. The common dc link between the shunt and series converters, which is used for exchanging active power in the UPFC, is eliminated in case of DPFC. This power is now transmitted through the transmission line at the Third harmonic frequency. 

[ijtsrd]

Improvement in Power Quality in Power system Through of DPFC

by Zeba Akram "Improvement in Power Quality in Power system Through of DPFC" 

Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-2 | Issue-4 , June 2018, 

URL: http://www.ijtsrd.com/papers/ijtsrd12959.pdf

Direct Link - http://www.ijtsrd.com/engineering/electrical-engineering/12959/improvement-in-power-quality-in-power-system-through-of-dpfc/zeba-akram

ugc listed journals, indexed journal, paper publication

In this paper a new member of FACTS family Distributed Power Flow Controller has been discussed. DPFC originates from unified power flow controller (UPFC). DPFC can be treated as UPFC as both have shunt and series controller beside the main difference in size and number of converter. DPFC maintains the terminal voltage constant by regulating the DC link voltage. As the D-FACTS converters are single-phase and floating with respect to the ground and no need for isolating the high voltage as in case of UPFC. DPFC has two control circuits for both series and shunt controller. Shunt controller uses classical PI controller and in shunt controller synchronous d-q-0 based controller is used. The effectiveness of DPFC is proved by MATLAB/Simulink model. The results shows that the DPFC can effectively compensate the harmonics and maintain the voltage level at the load terminals.