Reactive power compensation system and method thereof

Patent metadata

Field	Value
Publication number	US-10088860-B2
Application number	US-201715585217-A
Country	US
Kind code	B2
Filing date	May 3, 2017
Priority date	May 31, 2016
Publication date	Oct 2, 2018
Grant date	Oct 2, 2018

Abstract

The present disclosure relates to a reactive power compensation system including a reactive power compensation unit for measuring compensate reactive power, an impedance measurement unit for measuring an impedance value of each of a plurality of loads, and a learning control unit for controlling the reactive power compensation unit based on the measured impedance value.

First claim

What is claimed is:

1. A system for compensating reactive power, the system comprising:
a reactive power compensation unit configured to measure compensate reactive power;
an impedance measurement unit configured to measure an impedance value of each of a plurality of loads; and
a learning control unit configured to monitor an impedance change amount according to a loading state or an environmental change, determine a control mode based on a monitored impedance change amount, and generate a control signal to control the reactive power compensation unit according to the determined control mode.

2. The system of claim 1 , wherein the control mode is selected from the group consisting of a voltage control mode, a reactive power control mode, a flicker compensation mode, and a voltage unbalance mode.

3. The system of claim 2 , wherein, when the control mode is selected from the group consisting of the reactive power control mode and the flicker compensation mode, the control signal is provided to the reactive power compensation unit to compensate reactive power of the reactive power compensation unit.

4. The system of claim 2 , wherein, when the control mode is the voltage control mode, the control signal is transmitted to a supply end to increase a voltage of power of the supply end.

5. The system of claim 1 , wherein the environmental change is at least one selected from the group consisting of a type, an amount, and a temperature of a work to be processed by each of the loads.

6. A method of compensating reactive power, the method comprising:
measuring an impedance value of each of a plurality of loads;
monitoring an impedance change amount according to a loading state of each of the loads or an environmental change;
determining a control mode based on a monitored impedance change amount; and
generating a control signal to compensate reactive power according to the determined control mode.

7. The method of claim 6 , wherein the control mode is selected from the group consisting of a voltage control mode, a reactive power control mode, a flicker compensation mode, and a voltage unbalance mode.

8. The method of claim 6 , wherein the environmental change is at least one selected from the group consisting of a type, an amount, and a temperature of a work to be processed by each of the loads.

9. The method of claim 6 , wherein the control mode is determined by using a learning control algorithm.

10. The method of claim 9 , wherein the learning control algorithm is selected from the group consisting of fuzzy, neural, chaos, and artificial intelligence.

Assignees

• Lsis Co Ltd

Inventors

• Choi Yong-Kil

Classifications

• H02J3/002

  Flicker reduction, e.g. compensation of flicker introduced by non-linear load · CPC title

• H02J3/1821 Primary

  using shunt compensators · CPC title

• H02J3/18

  Arrangements for adjusting, eliminating or compensating reactive power in networks · CPC title

• H02J3/01

  Arrangements for reducing harmonics or ripples · CPC title

• G05F1/70 Primary

  Regulating power factor; Regulating reactive current or power · CPC title