Short circuit current limiting device for harmonic suppression and reactive compensation
A short-circuit current limiting and harmonic suppression technology, applied in reactive power compensation, harmonic reduction devices, emergency protection circuit devices for limiting overcurrent/overvoltage, etc. Inconvenient life, single function and other problems, to achieve the effect of reducing voltage drop, realizing harmonic suppression and reactive power compensation functions, and improving power supply reliability and system stability
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[0010] figure 1 It is a specific embodiment of the present invention.
[0011] The present invention includes a short-circuit current limiting reactor 1, a three-phase converter 2, a system power supply 3, a load 4, and a high-pass filter 5; as figure 1 shown.
[0012] One end of the short-circuit current limiting reactor 1 is connected to the system power supply 3, and the other end is connected to the load 4, that is, it is connected in series between the system power supply 3 and the load 4; the three-phase converter 2 is connected in parallel to the load 4 through a high-pass filter 5; The three-phase converter 2 is composed of six IGBT devices and their anti-parallel diodes and DC capacitors. Six IGBTs and their antiparallel diodes form three bridge arms. Each bridge arm is composed of two upper and lower IGBTs and their anti-parallel diodes connected in series, and the connection point of the two IGBTs is the output end of the bridge arm. The upper and lower ends of ...
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