Title:
ICE-MELTING DEVICE HAVING REACTIVE COMPENSATION AND OUTPUT CURRENT REGULATION FUNCTIONS
Document Type and Number:
WIPO Patent Application WO/2022/121094
Kind Code:
A1
Abstract:
An ice-melting device having reactive compensation and output current regulation functions. The ice-melting device comprises: at least one transformer (10), at least one inverter circuit (20), a fundamental electric signal detection module (30) and a control module (40), wherein the transformer (10) comprises a primary winding (W1) and a secondary winding (W2); the primary winding (W1) is connected in series or in parallel between a power grid (50) and a harmonic source (60); the secondary winding (W2) is connected to the inverter circuit (20); the inverter circuit (20) is connected to the control module (40); the fundamental electric signal detection module (30) is connected to the primary winding (W1) and the control module (40) and is used for measuring the current or voltage of the primary winding (W1); the control module (40) is used for controlling, according to the current of the primary winding (W1), the inverter circuit (20) to output a fundamental current which is then injected into the secondary winding (W2), so as to regulate the impedance of the primary winding (W1), thereby regulating an output current; when the current reaches the critical ice-melting current of a line, ice melting of the line can be realized; or, according to the voltage of the primary winding (W1), the inverter circuit (20) is controlled to output a fundamental voltage which is then injected into the secondary winding (W2), so as to regulate the impedance of the primary winding (W1), thereby realizing a reactive compensation function.
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Inventors:
YANG FANG (CN)
TANG XIAOLIANG (CN)
ZHOU YABING (CN)
TANG XIAOLIANG (CN)
ZHOU YABING (CN)
Application Number:
PCT/CN2021/074088
Publication Date:
June 16, 2022
Filing Date:
January 28, 2021
Export Citation:
Assignee:
QINGYUAN POWER SUPPLY BUREAU OF GUANGDONG POWER GRID CORP (CN)
International Classes:
H02G7/16; H02J1/02; H02G1/02
Foreign References:
| CN111431126A | 2020-07-17 | |||
| CN111478262A | 2020-07-31 | |||
| CN111431125A | 2020-07-17 | |||
| CN203071849U | 2013-07-17 | |||
| CN107196263A | 2017-09-22 | |||
| EP2020380A2 | 2009-02-04 | |||
| SU705583A1 | 1979-12-25 |
Other References:
LI, DAYI: "Research on a Series Hybrid Active Power Filter Based on Fundamental Magnetic Flux Compensation", CHINESE DOCTORAL DISSERTATIONS & MASTER'S THESES FULL-TEXT DATABASE (DOCTOR), 1 March 2005 (2005-03-01), XP055940650
KE DAI, PEIGUO LIU, JIAN XIONG, JIAN CHEN: "Study on dual-DSP-controued three-phase series-parallel compensated line-interactive UPS system (delta-conversion UPS)", ELECTRIC MACHINES AND DRIVES CONFERENCE, 2003. IEMDC'03, vol. 1, 1 June 2003 (2003-06-01) - 4 June 2003 (2003-06-04), pages 436 - 442, XP010644797, ISBN: 978-0-7803-7817-9
KE DAI, PEIGUO LIU, JIAN XIONG, JIAN CHEN: "Study on dual-DSP-controued three-phase series-parallel compensated line-interactive UPS system (delta-conversion UPS)", ELECTRIC MACHINES AND DRIVES CONFERENCE, 2003. IEMDC'03, vol. 1, 1 June 2003 (2003-06-01) - 4 June 2003 (2003-06-04), pages 436 - 442, XP010644797, ISBN: 978-0-7803-7817-9
Attorney, Agent or Firm:
BEYOND ATTORNEYS AT LAW (CN)
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