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US 2013/0076118 A1Published application
Wire connecting method and converter station for ultra-high voltage direct current power transmission, and ultra-high voltage direct current power transmission system
AssigneeState Grid Corporation of China
InventorsZhenya Liu, Yinbiao Shu, Xin Sun, Liying Gao
Life of this patent
Estimating the term…
Abstract
Connection methods for UHVDC transmission at rectification side and at inversion side, UHV converter stations at rectification side and at inversion side, and an UHVDC transmission system are disclosed. The present invention employs a manner of multiple drop points to solve the problem of poor security stability of electric grid caused by feeding a large amount of power via one point.
Claims70
A connection method for UHVDC transmission at rectification side, comprising:
- setting an UHV HV converter station at rectification side and an UHV LV converter station at rectification side respectively;
- said UHV LV converter station at rectification side receiving a first AC power from a first power source collection point, converting said first AC power into a first low voltage DC power and inputting it into said UHV HV converter station at rectification side;
- said UHV HV converter station at rectification side receiving a second AC power from a second power source collection point and said first low voltage DC power, rectifying said second AC power and superimposing it with said first low voltage DC power to generate a first UHVDC power and outputting the first UHVDC power via an UHV DC transmission line.
A connection method for UHVDC transmission at inversion side, comprising:
- setting an UHV HV converter station at inversion side and an UHV LV converter station at inversion side respectively;
- said UHV HV converter station at inversion side inputting a first UHVDC power via an UHVDC transmission line, and outputting a third AC power and a second low voltage DC power;
- transmitting said third AC power to a first load area;
- said UHV LV converter station at inversion side converting said second low voltage DC power into a fourth AC power and transmitting it to a second load area.
1 more element
A connection method for UHVDC transmission, comprising:
- setting an UHV HV converter station at rectification side and an UHV LV converter station at rectification side respectively;
- setting an UHV HV converter station at inversion side and an UHV LV converter station at inversion side respectively;
- said UHV LV converter station at rectification side receiving a first AC power from a first power source collection point, converting said first AC power into a first low voltage DC power and inputting it to the UHV HV converter station at rectification side;
- the UHV HV converter station at rectification side receiving a second AC power from a second power source collection point and said first low voltage DC power, rectifying the second AC power and superimposing it with the first low voltage DC power to generate a first UHVDC power and outputting the first UHVDC power via an UHVDC transmission line;
- said UHV HV converter station at inversion side inputting the first UHVDC power via the UHVDC transmission line, and outputting a third AC power and a second low voltage DC power;
- transmitting said third AC power to a first load area;
- said UHV LV converter station at inversion side converting said second low voltage DC power into a fourth AC power and transmitting it to a second load area.
4 more elements
A connection method for UHVDC transmission at rectification side, comprising:
- setting an UHV HV converter station at rectification side, an UHV LV converter station at rectification side, and an UHV MV converter station at rectification side respectively;
- said UHV LV converter station at rectification side receiving a first AC power from a first power source collection point, converting said first AC power into a first low voltage DC power and inputting it into said UHV MV converter station at rectification side;
- said UHV MV converter station at rectification side receiving an AC power and said first low voltage DC power, rectifying said AC power and superimposing it with said first low voltage DC power to generate a first medium voltage DC power and outputting the first medium voltage DC power to said UHV HV converter station at rectification side;
- said UHV HV converter station at rectification side receiving a second AC power from a second power source collection point and said first medium voltage DC power, rectifying said second AC power and superimposing it with the first medium voltage DC power to generate a first UHVDC power and outputting the first UHVDC power via an UHVDC transmission line.
1 more element
A connection method for UHVDC transmission at inversion side, comprising:
- setting an UHV HV converter station at inversion side, an UHV LV converter station at inversion side, and an UHV MV converter station at inversion side respectively;
- said UHV HV converter station at inversion side inputting a first UHVDC power via an UHVDC transmission line, and outputting a third AC power and a second medium voltage DC power;
- transmitting said third AC power to a first load area;
- said UHV MV converter station at inversion side receiving said second medium voltage DC power, outputting an AC power and a second low voltage DC power, and transmitting the output AC power to a corresponding load area;
- said UHV LV converter station at inversion side converting said second low voltage DC power into a fourth AC power and transmitting it to a second load area.
2 more elements
A connection method for UHVDC transmission, comprising:
- setting an UHV HV converter station at rectification side, an UHV LV converter station at rectification side, and an UHV MV converter station at rectification side respectively;
- setting an UHV HV converter station at inversion side, an UHV LV converter station at inversion side, and an UHV MV converter station at inversion side respectively;
- said UHV LV converter station at rectification side receiving a first AC power from a first power source collection point, converting said first AC power into a first low voltage DC power and inputting it to said UHV MV(medium voltage converter station at rectification side;
- said UHV MV converter station at rectification side receiving an AC power and said first low voltage DC power, rectifying said AC power and superimposing it with said first low voltage DC power to generate a first medium voltage DC power and inputting the first medium voltage DC power to the UHV HV converter station at rectification side;
- said UHV HV converter station at rectification side receiving a second AC power from a second power source collection point and said first medium voltage DC power, rectifying said second AC power and superimposing it with said first medium voltage DC power to generate a first UHV DC power and outputting the first UHVDC power via an UHVDC transmission line;
- said UHV HV converter station at inversion side inputting the first UHVDC power via the UHVDC transmission line, and outputting a third AC power and a second medium voltage DC power;
- transmitting said third AC power to a first load area;
- said UHV MV converter station at inversion side receiving said second medium voltage DC power, outputting an AC power and a second low voltage DC power, and transmitting the output AC power to a corresponding load area;
- and
- said UHV LV converter station at inversion side converting said second low voltage DC power into a fourth AC power and transmitting it to a second load area.
7 more elements
An UHV converter station at rectification side, comprising:
- an UHV LV converter station at rectification side for receiving a first AC power from a first power source collection point, converting said first AC power into a first low voltage DC power and inputting it into an UHV HV converter station at rectification side;
- said UHV HV converter station at rectification side for receiving a second AC power from a second power source collection point and said first low voltage DC power, rectifying said second AC power and superimposing it with the first low voltage DC power to generate a first UHVDC power and outputting the first UHVDC power via an UHVDC transmission line.
An UHV converter station at inversion side, comprising:
- an UHV HV converter station at inversion side for inputting a first UHVDC power via an UHVDC transmission line, outputting a third AC power and a second low voltage DC power, and transmitting said third AC power to a first load area;
- an UHV LV converter station at inversion side for converting said second low voltage DC power into a fourth AC power and transmitting it to a second load area.
An UHVDC transmission system, said system comprises a UHV converter station at rectification side and a UHV converter station at inversion side, wherein said UHV HV converter station at rectification side in the UHV converter station at rectification side and UHV HV converter station at inversion side in the UHV converter station at inversion side are connected via said UHVDC transmission line.
An UHV converter station at rectification side, comprising:
- an UHV LV converter station at rectification side for receiving a first AC power from a first power source collection point, converting said first AC power into a first low voltage DC power and inputting it into an UHV MV converter station at rectification side;
- said UHV MV converter station at rectification side for receiving an AC power and said first low voltage DC power, rectifying said AC power and superimposing it with said first low voltage DC power to generate a first medium voltage DC power and inputting the first medium voltage DC power into an UHV HV converter station at rectification side;
- said UHV HV converter station at rectification side for receiving a second AC power from a second power source collection point and said first medium voltage DC power, rectifying said second AC power and superimposing it with said first medium voltage DC power to generate a first UHVDC power and outputting the first UHVDC power via an UHVDC transmission line.
An UHV converter station at inversion side, comprising:
- an UHV HV converter station at inversion side for inputting a first UHVDC power via an UHVDC transmission line, outputting a third AC power and a second medium voltage DC power, and transmitting said third AC power to a first load area, transmitting said second medium voltage DC power to an UHV MV converter station at inversion side;
- said UHV MV converter station at inversion side for receiving said second medium voltage DC power, outputting an AC power and a second low voltage DC power, and transmitting the output AC power to a corresponding load area;
- an UHV LV converter station at inversion side for receiving said second low voltage DC power, and converting it into a fourth AC power and transmitting it to a second load area.
An UHVDC transmission system, wherein, said system comprises a UHV converter station at rectification side and a UHV converter station at inversion side, wherein said UHV HV converter station in the UHV converter station at rectification side is connected to said UHV HV converter station at inversion side in the UHV converter station at inversion side via said UHV DC transmission line.
Dependencies are inferred from the claim text.