The invention discloses a cascaded unified
electric energy quality regulating
system, which comprises cascaded parallel connection units, inverse transformation units, isolation transformers,
rectifier units, series connection units and a TSR (
Thyristor Switch Reactor)
branch, wherein the cascaded parallel connection units are formed by cascading a plurality of
H bridge modules and are connected to a
power grid; the inverse transformation units are used for carrying out inversion transformation on
voltage on a
direct current capacitor on each potential of the cascaded parallel connection units to form
alternating current; the isolation transformers are used for transferring the
alternating current formed by inverse transformation of the inverse transformation units to the
rectifier units through a magnetic
coupling manner; the
rectifier units are used for transforming
alternating current energy from the isolation transformers to a
direct current side and carrying out
voltage stabilization on the
direct current voltage; the series connection units are formed by cascading a plurality of
H bridge modules and are connected to a connection reactor Lc and a series
capacitor Cc in parallel, and compensate through controlling an amplitude of the voltage and voltage
harmonic of the output voltage about the load; the TSR
branch is connected by a plurality of thyristors in series and is connected to a reactor Lg in series, and the reactor Lg is connected to a loop in series through controlling conduction of a
thyristor string. The cascaded unified
electric energy quality regulating
system has the advantages of simple principle, easiness in implementation, wide application range, capability of greatly improving the
electric energy quality, and the like.