Title:
CONTROL DEVICE AND CONTROL METHOD HAVING BOTH PID EFFECT SUPPRESSION AND REPARATION FUNCTIONS
Document Type and Number:
WIPO Patent Application WO/2018/171765
Kind Code:
A1
Abstract:
The present invention relates to a control device and control method having both Potential Induced Degradation (PID) effect suppression and reparation functions. The control device comprises a plurality of sub-control switches which correspond one-to-one to each photovoltaic power generation inverter system, a main control switch and an isolated voltage source having an adjustable output voltage; an end of the main control switch is connected to a neutral point of a transformer, and another end of the main control switch is connected to a positive output end of the isolated voltage source, while a negative output end of the isolated voltage source is connected to protective ground; an end of each sub-control switch is connected to an output negative end of a photovoltaic cell panel in a corresponding photovoltaic power generation inverter system, while another end of each sub-control switch is connected to a positive output end of the isolated voltage source. The control device further comprises a current-limiting resistor, a current sensor, and a fuse. The present invention may simultaneously solve the problems wherein costs and risk of electric shock for a nighttime inverse-voltage scheme are high, as well as the risk of electric shock caused by alternating current neutral-point elevation, and may better solve the problems of suppressing and repairing a PID effect in a grid-connected photovoltaic system.
Inventors:
HUANG MIN (CN)
ZENG WEIBO (CN)
XU NAN (CN)
JIANG FENG (CN)
CAI WEN (CN)
FANG GANG (CN)
LU JINJUN (CN)
ZENG WEIBO (CN)
XU NAN (CN)
JIANG FENG (CN)
CAI WEN (CN)
FANG GANG (CN)
LU JINJUN (CN)
Application Number:
PCT/CN2018/080348
Publication Date:
September 27, 2018
Filing Date:
March 23, 2018
Export Citation:
Assignee:
GOODWE POWER SUPPLY TECH CO LTD (CN)
International Classes:
H02J3/38
Foreign References:
| CN104201715A | 2014-12-10 | |||
| CN203218893U | 2013-09-25 | |||
| CN103973217A | 2014-08-06 | |||
| CN106961118A | 2017-07-18 |
Attorney, Agent or Firm:
SUZHOU CREATOR PATENT & TRADEMARK AGENCY LTD. (CN)
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