US 11,742,648 B2
Online ice melting apparatus
Xiaoliang Tang, Guangdong (CN); Fang Yang, Guangdong (CN); Yabing Zhou, Guangdong (CN); Weibin Jiang, Guangdong (CN); and Kaihong Li, Guangdong (CN)
Assigned to QINGYUAN POWER SUPPLY BUREAU OF GUANGDONG POWER GRID CORPORATION, Guangdong (CN)
Appl. No. 17/911,417
Filed by QINGYUAN POWER SUPPLY BUREAU OF GUANGDONG POWER GRID CORPORATION, Guangdong (CN)
PCT Filed Aug. 10, 2020, PCT No. PCT/CN2020/108167
§ 371(c)(1), (2) Date Sep. 13, 2022,
PCT Pub. No. WO2021/227268, PCT Pub. Date Nov. 18, 2021.
Claims priority of application No. 202010393956.8 (CN), filed on May 11, 2020.
Prior Publication US 2023/0128839 A1, Apr. 27, 2023
Int. Cl. H02G 7/16 (2006.01); H05B 3/00 (2006.01)
CPC H02G 7/16 (2013.01) [H05B 3/0004 (2013.01); H05B 3/0023 (2013.01); H05B 2214/02 (2013.01)] 10 Claims
OG exemplary drawing
 
1. An online ice melting apparatus, applied for melting ice on a three-phase line, comprising an adjustable reactor, a grounding transformer, a controller, and an auxiliary circuit;
wherein the grounding transformer is electrically connected to the three-phase line and a first terminal of the adjustable reactor separately, the auxiliary circuit is connected between a second terminal of the adjustable reactor and a line of any phase of the three-phase line, and the grounding transformer, the adjustable reactor, the auxiliary circuit, and the line of the any phase of the three-phase line form a first control loop; and
wherein the adjustable reactor comprises a working winding, a control winding, and a short-circuit winding; the working winding is connected between the grounding transformer and the auxiliary circuit, the controller is electrically connected to the control winding and the short-circuit winding separately, and the controller is configured for adjusting a reactance value of the control winding and/or a reactance value of the short-circuit winding to adjust a reactance value of the working winding so as to control a current of the first control loop.