Title:
STATION-USED DIRECT CURRENT POWER SUPPLY SYSTEM FOR 220 KV INTELLIGENT ENERGY STATION
Document Type and Number:
WIPO Patent Application WO/2022/028116
Kind Code:
A1
Abstract:
A station-used direct current power supply system for a 220 kV intelligent energy station, comprising an alternating current micro-grid 380/220 V bus (1) and a direct current micro-grid 750 V bus (2) which are connected by means of an AC/DC converter I (3); the alternating current micro-grid 380/220 V bus (1) supplies power to a station-used direct current 220 V bus I (5) by means of an AC/DC converter II (4), the direct current micro-grid 750 V bus (2) supplies power to a station-used direct current 220 V bus II (7) by means of a DC/DC converter I (6), and the station-used direct current 220 V bus I (5) and the station-used direct current 220 V bus II (7) are connected by means of a direct current connecting switch (8); and the alternating current micro-grid 380/220 V bus (1) is provided with an alternating current feeder box (9) and MW-grade lithium iron phosphate energy storage (10), and the direct current micro-grid 750 V bus (2) is provided with an supercapacitor I (11). An MW lithium iron phosphate peak regulation energy storage system can be reused, a station-used lead-acid storage battery is eliminated, a conventional UPS power supply is eliminated, and a small-capacity supercapacitor is configured to stabilize a station-used direct current bus voltage, so that the present invention improves the reliability and stability of the whole system, and also has a reduced footprint and decreased operation and maintenance workload, is more environmentally friendly, and sufficiently utilizes the advantages of multi-station integration.
Inventors:
SUN ZHIYUN (CN)
LI XIAOYUN (CN)
YU ZIHUA (CN)
LI HUI (CN)
LU XIAOLONG (CN)
LIU SHENGLI (CN)
ZHANG YAN (CN)
XIE BIN (CN)
YI NA (CN)
CHEN WEI (CN)
ZHONG YI (CN)
LI XIAOYUN (CN)
YU ZIHUA (CN)
LI HUI (CN)
LU XIAOLONG (CN)
LIU SHENGLI (CN)
ZHANG YAN (CN)
XIE BIN (CN)
YI NA (CN)
CHEN WEI (CN)
ZHONG YI (CN)
Application Number:
PCT/CN2021/100067
Publication Date:
February 10, 2022
Filing Date:
June 15, 2021
Export Citation:
Assignee:
CHINA ENERGY ENGINEERING GROUP HUNAN ELECTRIC POWER DESIGN INST CO LTD (CN)
International Classes:
H02J3/32; H02J1/10; H02J7/34
Foreign References:
| CN212258417U | 2020-12-29 | |||
| CN111769542A | 2020-10-13 | |||
| CN110829508A | 2020-02-21 | |||
| CN110867946A | 2020-03-06 | |||
| CN206850452U | 2018-01-05 | |||
| US20170063151A1 | 2017-03-02 | |||
| CN103840548A | 2014-06-04 | |||
| CN208353199U | 2019-01-08 |
Attorney, Agent or Firm:
QIYUAN PATENT PROPERTY LAW FIRM (GENERAL PARTNERSHIP) (CN)
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