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Title:
DIRECT-CURRENT BUS VOLTAGE FLUCTUATION SUPPRESSION METHOD AND CONTROL METHOD FOR DUAL-PWM CURRENT CONVERTER
Document Type and Number:
WIPO Patent Application WO/2017/198042
Kind Code:
A1
Abstract:
A direct-current bus voltage fluctuation suppression method and control method for a dual-PWM current converter. The direct-current bus voltage fluctuation suppression method comprises the following steps: establishing a power balance equation among a grid side, a load side and an intermediate capacitor (200); establishing a capacitor instantaneous active power small-signal model of the intermediate capacitor; establishing a load instantaneous active power small-signal model of the load side; calculating a grid-side instantaneous active power reference value (p*) according to the capacitor instantaneous active power small-signal model, the load instantaneous active power small-signal model and the power balance equation; and performing feedback control over the grid-side current converter (100) by using a grid-side instantaneous active power reference value as a power reference. The grid-side reference value contains direct-current bus voltage ripple waves and state change information of the load (400), and the effectiveness is high. In addition, the impact of load changes on the bus voltage is considered in the adjustment of the grid-side current converter, thereby reducing fluctuation of the direct-current bus voltage.

Inventors:
ZHANG, Xuefen (West Jinji Road, Qiansha, Zhuihai City Guangdong 0, 519070, CN)
JIANG, Shiyong (West Jinji Road, Qiansha, Zhuihai City Guangdong 0, 519070, CN)
LIU, Keqin (West Jinji Road, Qiansha, Zhuihai City Guangdong 0, 519070, CN)
FENG, Chongyang (West Jinji Road, Qiansha, Zhuihai City Guangdong 0, 519070, CN)
YUAN, Jinrong (West Jinji Road, Qiansha, Zhuihai City Guangdong 0, 519070, CN)
JIANG, Yingyi (West Jinji Road, Qiansha, Zhuihai City Guangdong 0, 519070, CN)
NI, Weitao (West Jinji Road, Qiansha, Zhuihai City Guangdong 0, 519070, CN)
Application Number:
CN2017/081712
Publication Date:
November 23, 2017
Filing Date:
April 24, 2017
Export Citation:
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Assignee:
GREE ELECTRIC APPLIANCES, INC. OF ZHUHAI (West Jinji Road, Qiansha, Zhuhai City Guangdong 0, 519070, CN)
International Classes:
H02M1/14; H02J1/02; H02M5/458
Foreign References:
CN1669208A2005-09-14
CN104218658A2014-12-17
CN103997245A2014-08-20
US9071141B22015-06-30
CN106026072A2016-10-12
Attorney, Agent or Firm:
ADVANCE CHINA IP LAW OFFICE (Room 3901, No. 85 Huacheng Avenue Tianhe Distric, Guangzhou Guangdong 3, 510623, CN)
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