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We have proposed a novel transformer model using magnetic circuit. Numerical simulations using PSCAD/EMTDC has been performed, and the performance have been examined.
This paper presents an average power balancing control technique for the modular multilevel cascaded converter (MMCC) based on single-star bridge cells (SSBC) in the static synchronous compensator (STATCOM) applications. Detailed power flow analyses of the MMCC-SSBC converter, from the bottoem level of individual H-bridge modules, then the middle level of per-phase circuit, to the top level of the...
Recently, distribution networks based smart grid have gained much attention due to the availability of installing hybrid power generators in addition to the merits of installing FACTS (Flexible AC Transmission System) equipments in order to control its node voltages and the power flow. This paper presents a new technique for achieving line loss minimization in radial distribution system using multiple...
The paper conducted a theoretical analysis and simulation research on the control strategy of STATCOM based on modular multilevel converter (MMC). Precharging control strategy, capacitor voltage balance control strategy as well as STATCOM control strategy are proposed. According to the simulation model of SVG, the strategy proposed is proposed. The control methods are tested with the help of PSCAD.
H-bridge cascaded static synchronous compensator (STATCOM) is often used to compensate the harmonic and reactive current derived from non-linear load. However, with the special topology structure, the voltage balancing of DC capacitors of H-bridge cascaded STATCOM is a key problem. Many papers adjust active voltage to solve this problem with the conventional PI controller which needs to regulate the...
The paper introduces development history and trends of converter technology for DC and AC transmission in Japan. The high voltage converter development started in 1960s in Japan. The paper describes technology trends in various aspects including semiconductor device, converter insulation, cooling, circuit topology and control. The paper covers the converter applications for HVDC, SVC and STATCOM associated...
Recently, medium voltage SiC devices have been developed which can be used for grid tie applications at medium voltage. Two such devices − 15 kV SiC IGBT and 10 kV SiC MOSFET have opened up the possibility of looking into different converter topologies for medium voltage distribution grid interface. These can be used in medium voltage drives, active filter applications or as the active front end converter...
This paper describes the overview and effectiveness of STATCOM introduced to the independent power system of JR East. In the independent power system, synchronous phase modifier (Rotary Condenser: RC) was introduced in Musashisakai AC substation. Because of its aging and increase of voltage fluctuation due to increase of loads, RC is replaced to the STATCOM which has higher performance and higher...
This paper investigates the performance of Static Synchrounous Compensator (STATCOM) with the new variation of multilevel selective harmonic elimination pulse width modulation (MSHE-PWM). The proposed MSHE-PWM optimizes both the dc-voltage levels and the switching angles, enabling more harmonics to be eliminated without affecting the structure of the inverter circuit. The method also provides constant...
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