By Suman Bhowmick
Flexible AC Transmission platforms (FACTS): Newton Power-Flow Modeling of Voltage-Sourced Converter-Based Controllers introduces various voltage-sourced converter (VSC)-based proof controllers and VSC-based high-voltage direct present (VSC-HVDC) platforms and their operating rules, explaining how evidence controllers trade genuine and reactive strength with structures.
Subsequently, the book:
- Describes the Newton–Raphson approach and its program for fixing the power-flow problem
- Presents the Newton power-flow modeling of the static synchronous sequence compensator (SSSC), unified power-flow controller (UPFC), interline power-flow controller (IPFC), generalized unified power-flow controller (GUPFC), and static synchronous compensator (STATCOM), accommodating the sensible gadget constraint limits (because of the original modeling approach, the present Newton power-flow codes may be reused)
- Develops a unified Newton power-flow version of AC structures incorporating multiterminal VSC-HVDC platforms with pulse-width modulation (PWM) keep an eye on schemes, without delay yielding the VSC modulation indices from the power-flow solution
- Provides quite a few case stories for validation of Newton power-flow versions, elaborating at the occurrences and checking of unrealistic power-flow options in remoted cases
- Includes precise derivations of all of the tough formulae in addition to solved difficulties on average VSC-based evidence controllers
Flexible AC Transmission structures (FACTS): Newton Power-Flow Modeling of Voltage-Sourced Converter-Based Controllers assumes not less than an undergraduate-level realizing of engineering arithmetic, community research, electric machines, electricity platforms, and tool electronics. hence, the booklet offers a necessary reference for practitioners in addition to senior-undergraduate and graduate scholars in electric engineering and electricity systems.
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Extra info for Flexible AC Transmission Systems (FACTS): Newton power-flow modeling of voltage-sourced converter based controllers
4. 4 THE UPFC A UPFC consists of two back-to-back linked self-commutating converters operated from a common DC link and connected to the AC system through series and shunt coupling transformers. Within its operating limits, a UPFC can independently control three power system parameters [15–17]. The first UPFC, with a total rating of ±320 MVA, was commissioned in mid-1998 at the Inez Station of the American Electric Power in Kentucky for voltage support and power flow control [18–21]. 8. 9. 9, Vse and Vsh represent the fundamental frequency, positive sequence output voltages of the series and shunt converters.
This requires the power flow solution of the network(s) incorporating these FACTS controllers, and therefore, the development of suitable power flow models of these controllers is a fundamental requirement. The earliest algorithms for power flow solution of networks were based on the Gauss–Seidel method. They suffered, however, from relatively poor convergence characteristics. Subsequently, the Newton–Raphson (NR) algorithm was developed. The underlying problem for the iterative Newton method is the solution of a matrix equation of large dimension.
20a through d. It is important to note that the phasor diagrams shown in the figure correspond to only one out of a myriad of schemes possible to achieve this objective. Although the phase angles of the voltages injected by the series converters 1 and 2 are assumed to be arbitrary, we again follow the basic rule that the IPFC cannot deliver or absorb active power by itself, that is, Re Vse1(−I1* ) + Vse2 (−I*2 ) = 0. First, we discuss the active power. 20a, it can be observed that due to the voltage Vse1 injected by the series converter 1, the magnitudes of the line drop I1 X and the line current I1 decreases.