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US 9,543,762 B2Granted
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.
Claims44
A connection method for UHVDC transmission at rectification side, comprising:
- setting an UHV HV converter station at rectification side comprising two HV valve halls with different polarities and an UHV LV converter station at rectification side comprising two LV valve halls with different polarities, 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, wherein said two HV valve halls with different polarities are located at different locations and/or said two LV valve halls with different polarities are located at different locations.
A connection method for UHVDC transmission at inversion side, comprising:
- setting an UHV HV converter station at inversion side comprising two HV valve halls with different polarities and an UHV LV converter station at inversion side comprising two LV valve halls with different polarities, 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, wherein said two HV valve halls with different polarities are located at different locations and/or said two LV valve halls with different polarities are located at different locations.
1 more element
A connection method for UHVDC transmission, comprising:
- setting an UHV HV converter station at rectification side comprising two HV valve halls with different polarities and an UHV LV converter station at rectification side comprising two LV valve halls with different polarities, 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, wherein said two HV valve halls with different polarities are located at different locations and/or said two LV valve halls with different polarities are located at different locations.
4 more elements
A connection method for UHVDC transmission at rectification side, comprising:
- setting an UHV HV converter station at rectification side comprising two HV valve halls with different polarities, an UHV LV converter station at rectification side comprising two LV valve halls with different polarities, and an UHV MV converter station at rectification side comprising two MV valve halls with different polarities, 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, wherein said two HV valve halls with different polarities are located at different locations, and/or the two MV valve halls with different polarities are located at different locations, and/or the two LV valve halls with different polarities are located at different locations.
1 more element
A connection method for UHVDC transmission at inversion side, comprising:
- setting an UHV HV converter station at inversion side comprising two HV valve halls with different polarities, an UHV LV converter station at inversion side comprising two LV valve halls with different polarities, and an UHV MV converter station at inversion side comprising two MV valve halls with different polarities, 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, wherein said two HV valve halls with different polarities are located at different locations, and/or the two MV valve halls with different polarities are located at different locations, and/or the two LV valve halls with different polarities are located at different locations.
2 more elements
A connection method for UHVDC transmission, comprising:
- setting an UHV HV converter station at rectification side comprising two HV valve halls with different polarities, an UHV LV converter station at rectification side comprising two LV valve halls with different polarities, and an UHV MV converter station at rectification side comprising two MV valve halls with different polarities, 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, wherein said two HV valve halls with different polarities are located at different locations, and/or the two MV valve halls with different polarities are located at different locations, and/or the two LV valve halls with different polarities are located at different locations.
7 more elements
An UHV converter station at rectification side, comprising:
- an UHV LV converter station at rectification side comprising two LV valve halls with different polarities 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 comprising two HV valve halls with different polarities;
- 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, wherein said two HV valve halls with different polarities are located at different locations and/or said two LV valve halls with different polarities are located at different locations.
An UHV converter station at inversion side, comprising:
- an UHV HV converter station at inversion side comprising two HV valve halls with different polarities 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 comprising two LV valve halls with different polarities for converting said second low voltage DC power into a fourth AC power and transmitting it to a second load area, wherein said two HV valve halls with different polarities are located at different locations and/or said two LV valve halls with different polarities are located at different locations.
An UHV converter station at rectification side, comprising:
- an UHV LV converter station at rectification side comprising two LV valve halls with different polarities 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 comprising two MV valve halls with different polarities;
- 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 comprising two HV valve halls with different polarities;
- 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, wherein said two HV valve halls with different polarities are located at different locations, and/or said two MV valve halls with different polarities are located at different locations, and/or said two LV valve halls with different polarities are located at different locations.
An UHV converter station at inversion side, comprising:
- an UHV HV converter station at inversion side comprising two HV valve halls with different polarities 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 comprising two MV valve halls with different polarities;
- 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 comprising two LV valve halls with different polarities for receiving said second low voltage DC power, and converting it into a fourth AC power and transmitting it to a second load area, wherein said two HV valve halls with different polarities of the UHV HV converter station at inversion side are located at different locations, and/or said two MV valve halls with different polarities of the UHV MV converter station at inversion side are located at different locations, and/or the two LV valve halls with different polarities of the UHV LV converter station at inversion side are located at different locations.
Dependencies are inferred from the claim text.