CN203859701U - Device of converter set of reuse HVDC transmission system - Google Patents
Device of converter set of reuse HVDC transmission system Download PDFInfo
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- CN203859701U CN203859701U CN201420216600.7U CN201420216600U CN203859701U CN 203859701 U CN203859701 U CN 203859701U CN 201420216600 U CN201420216600 U CN 201420216600U CN 203859701 U CN203859701 U CN 203859701U
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- high voltage
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- transmission system
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 56
- 238000006243 chemical reaction Methods 0.000 claims description 23
- 238000005259 measurement Methods 0.000 claims description 9
- 238000009499 grossing Methods 0.000 claims description 8
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
Abstract
The utility model provides a device of a converter set of a reuse HVDC transmission system. The HVDC transmission system comprises a convertor station, and the convertor station comprises a high-voltage converter set, a low-voltage converter set and a first switch, wherein the high-voltage converter set is electrically connected with a first AC power grid, and comprises a first DC end and a second DC end; the low-voltage converter set is electrically connected with a second AC power grid, and comprises a third DC end and a fourth DC end; the second DC end of the high-voltage converter set is connected with the third DC end of the low-voltage converter set in series; the first switch is bridged between the first DC end of the high-voltage converter set and the fourth DC end of the low-voltage converter set; and the first AC power grid and the second AC power grid are independent from each other. By adopting the topological structure, the converters can be reused for establishing emergent back-to-back solutions under the condition that the HVDC transmission system especially the UHV DC transmission system fails.
Description
Technical field
The utility model relates to the set of converters of HVDC (High Voltage Direct Current) transmission system, more particularly, relates to the device of the set of converters of multiplexing HVDC (High Voltage Direct Current) transmission system.
Background technology
At present, with regard to HVDC (High Voltage Direct Current) transmission system, particularly with regard to extra-high voltage DC transmission system, the current conversion station in system may be connected to two or more independently AC network, and for example one of them is 500 kilovolts, and another one is 1000 kilovolts.
In DC transmission engineering, sometimes exist rectifier or inverter normally to work, but the AC network connecting due to DC bus or current conversion station break down, phenomenon that cannot through-put power.For example, due to China's serious ice storm weather of 2008, in the high voltage DC engineering of existing Three Gorges, some transmission poles are collapsed, and therefore transmission of electricity is interrupted.Even with the fastest maintenance speed, still need the time of several days; During this period, the rectifier that still can normally work or inverter cannot through-put powers.
In AC network, there is following phenomenon at present: be connected to two AC network on same current conversion station, for example, and one 1000 kilovolts, another 500 kilovolts.Between them, there are some connections.They use the mode of high voltage direct current to access other electrical network to send or to input active power by current conversion station.When other electrical network, current conversion station or the DC bus that are connected break down when cannot carrying or receiving active power, even if the power delivery capacity of the connection line between these two AC network is fully used, but because the maximum transmission power of this circuit holds quantitative limitation, still may there is electricity shortage in one of them AC network, and another one AC network may have electric power surplus, but cannot utilize existing connection to carry out needed active power transmission.
Utility model content
For above-mentioned technical problem, the utility model provides a kind of device of set of converters of multiplexing HVDC (High Voltage Direct Current) transmission system, wherein: described HVDC (High Voltage Direct Current) transmission system comprises: current conversion station; This current conversion station comprises: with the high voltage current changer group of the first AC network electrical connection, it comprises the first DC terminal and the second DC terminal; With with the low pressure set of converters of the second AC network electrical connection, it comprises the 3rd DC terminal and the 4th DC terminal; Wherein: the second DC terminal of described high voltage current changer group is connected with the 3rd DC terminal of described low pressure set of converters; Be connected across the first switch between the first DC terminal of described high voltage current changer group and the 4th DC terminal of described low pressure set of converters; Described the first AC network and described the second AC network are independent of one another.
By adopting above topology structure,, can reuse converter and build urgent back-to-back solution particularly extra-high voltage direct-current transmission system breaks down in the situation that in HVDC Transmission system.Can on DC bus, transmit even without power, active power still can be transmitted between the AC network of two or more this locality.In shortage of power situation, can improve the safety of whole electrical network.Especially for UHVDC converter station, it can transmitting active power be huge (7-10GW+ grade), in case of emergency, wherein the active power of half can be transmitted by the back-to-back configuration of converter between two AC network.
Brief description of the drawings
Fig. 1 illustrates according to the device of the set of converters of the multiplexing HVDC (High Voltage Direct Current) transmission system of an embodiment of the present utility model; With
Fig. 2 illustrates according to the device of the set of converters of the multiplexing HVDC (High Voltage Direct Current) transmission system of another embodiment of the present utility model.
Embodiment
Fig. 1 illustrates according to the device of the set of converters of the multiplexing HVDC (High Voltage Direct Current) transmission system of an embodiment of the present utility model.As shown in Figure 1, the current conversion station 10 of HVDC (High Voltage Direct Current) transmission system 1 comprises: with the high voltage current changer group 100 of the first AC network A electrical connection and with the low pressure set of converters 101 of the second AC network B electrical connection; The two ends of high voltage current changer group 100 are the first DC terminal 100a and the second DC terminal 100b; The two ends of low pressure set of converters 101 are the 3rd DC terminal 101a and the 4th DC terminal 101b; And the second DC terminal 100b of high voltage current changer group 100 connects with the 3rd DC terminal 101a of low pressure set of converters 101.The first AC network A and the second AC network B are two AC network independent of each other that are connected on same current conversion station.The device 2 of the set of converters of multiplexing HVDC (High Voltage Direct Current) transmission system comprises: be connected across the first switch 20 between the first DC terminal 100a of high voltage current changer group 100 and the 4th DC terminal 101b of low pressure set of converters 101.Specifically, current conversion station 10 also comprises: the first smoothing reactor 102 being electrically connected between the first DC terminal 100a of high voltage current changer group 100 and the first utmost point 11a of the DC bus 11 of HVDC (High Voltage Direct Current) transmission system 1, and the second smoothing reactor 103 being electrically connected between the second DC terminal 101b of low pressure set of converters 101 and the second utmost point 11b of the DC bus 11 of HVDC (High Voltage Direct Current) transmission system 1; The two ends of the first switch 20 are electrically connected with current conversion station 10 by the first smoothing reactor 102 and the second smoothing reactor 103 respectively.In the time of HVDC (High Voltage Direct Current) transmission system 1 normal operation, the first switch 20 disconnects.When HVDC (High Voltage Direct Current) transmission system 1 cannot through-put power (for example, in DC bus, HVDC (High Voltage Direct Current) transmission system 1, for current conversion station 10, the current conversion station of the other end or the AC network of its connection break down and cannot through-put powers) and current conversion station 10 still can normally work time, the first switch 20 closures; Now, high voltage current changer group 100 is operated in rectification state, and low pressure set of converters 101 is operated in inverter mode, thereby active-power P 1 (shown in arrow) transfers to the second AC network B from the first AC network A via high voltage current changer group 100 and low pressure set of converters 101; Mode as an alternative, high voltage current changer group 100 is operated in inverter mode, low pressure set of converters 101 is operated in rectification state, thereby active-power P 2 (shown in arrow) transfers to the first AC network A from the second AC network B via low pressure set of converters 101 and high voltage current changer group 100.
By adopting above topology structure,, can reuse converter and build urgent back-to-back solution particularly extra-high voltage direct-current transmission system breaks down in the situation that in HVDC Transmission system.Can on DC bus, transmit even without power, active power still can be transmitted between the AC network of two or more this locality.In shortage of power situation, can improve the safety of whole electrical network.Especially for UHVDC converter station, it can transmitting active power be huge (7-10GW+ grade), in case of emergency, wherein the active power of half can be transmitted by the back-to-back configuration of converter between two AC network.
Best, the device 2 of the set of converters of multiplexing HVDC (High Voltage Direct Current) transmission system also comprises direct voltage V between detection high voltage current changer group 100 and low pressure set of converters 101
dcmeasurement component 21 (being to be mainly used in when two set of converters operating voltages are different or will realize the occasion of different DC voltage controls).As shown in Figure 1, measurement component 21 can be placed near the electric point of contact of high voltage current changer group 100 and low pressure set of converters 101.
Fig. 2 illustrates according to the device of the set of converters of the multiplexing HVDC (High Voltage Direct Current) transmission system of another embodiment of the present utility model.The difference of the device of the set of converters of the multiplexing HVDC (High Voltage Direct Current) transmission system shown in device and Fig. 1 of the set of converters of the multiplexing HVDC (High Voltage Direct Current) transmission system shown in Fig. 2 is that it does not use independent measurement component 21, but V on multiplexing DC bus general in HVDC (High Voltage Direct Current) transmission system 1
dcmeasurement component 22.For the simple reasons, the Reference numeral that Fig. 1 is identical with Fig. 2 represents identical parts.As shown in Figure 2, HVDC (High Voltage Direct Current) transmission system 1 comprises the measurement component 22 of the direct voltage of the primary importance L of the DC bus 11 that detects HVDC (High Voltage Direct Current) transmission system 1.The device 3 of the set of converters of multiplexing HVDC (High Voltage Direct Current) transmission system comprises: be connected across the first switch 20 between the first DC terminal 100a of high voltage current changer group 100 and the 4th DC terminal 101b of low pressure set of converters 101, be connected across second switch 30 between the DC terminal 10a of current conversion station 10 and the DC bus 11 of HVDC (High Voltage Direct Current) transmission system 1, and be connected across the 3rd switch 31 between the second DC terminal 100b of high voltage current changer group 100 and the coupling part of the 3rd DC terminal 101a of low pressure set of converters 101 and the primary importance L of DC bus 11.Equally, in the time of HVDC (High Voltage Direct Current) transmission system 1 normal operation, the first switch 20 disconnects, and second switch 30 closures and the 3rd switch 31 disconnect.When HVDC (High Voltage Direct Current) transmission system 1 cannot through-put power (for example, in DC bus, HVDC (High Voltage Direct Current) transmission system 1, for current conversion station 10, the current conversion station of the other end or the AC network of its connection break down and cannot through-put powers) and current conversion station 10 still can normally work time, the first switch 20 closures, second switch 30 disconnects and the 3rd switch 31 closures; Now, high voltage current changer group 100 is operated in rectification state, and low pressure set of converters 101 is operated in inverter mode, thereby active-power P 1 (shown in arrow) transfers to the second AC network B from the first AC network A via high voltage current changer group 100 and low pressure set of converters 101; Mode as an alternative, high voltage current changer group 100 is operated in inverter mode, low pressure set of converters 101 is operated in rectification state, thereby active-power P 2 (shown in arrow) transfers to the first AC network A from the second AC network B via low pressure set of converters 101 and high voltage current changer group 100.
Above topology structure, introduces the first switch, second switch and the 3rd switch on the basis of conventional DC bus, thereby has reused the measurement component 22 of HVDC (High Voltage Direct Current) transmission system 1 and do not needed extra measurement point.In addition, use electrode grounding instead of local current conversion station ground connection.For the back-to-back running that can frequently not occur of hypothesis, can replace isolating switch and bus with interim being flexible coupling.In this configuration, can optionally use DC filter, DC filter can't have influence on application back-to-back.
Although illustrate and described the utility model with reference to some preferred embodiment of the present utility model, but it will be appreciated by those skilled in the art that, in the situation that not deviating from spirit and scope of the present utility model as defined in appended claims, can make a variety of changes it in the form and details.
Claims (6)
1. a device for the set of converters of multiplexing HVDC (High Voltage Direct Current) transmission system, wherein:
Described HVDC (High Voltage Direct Current) transmission system comprises:
Current conversion station, comprising:
With the high voltage current changer group of the first AC network electrical connection, it comprises the first DC terminal and the second DC terminal; With
With the low pressure set of converters of the second AC network electrical connection, it comprises the 3rd DC terminal and the 4th DC terminal;
Wherein:
The second DC terminal of described high voltage current changer group is connected with the 3rd DC terminal of described low pressure set of converters;
It is characterized in that comprising:
Be connected across the first switch between the first DC terminal of described high voltage current changer group and the 4th DC terminal of described low pressure set of converters;
Wherein:
Described the first AC network and described the second AC network are independent of one another.
2. the device of the set of converters of multiplexing HVDC (High Voltage Direct Current) transmission system as claimed in claim 1, is characterized in that:
Described the first switch closure;
Described high voltage current changer group is rectification unit/inversion unit;
Described low pressure set of converters is inversion unit/rectification unit; And
Active power transfers to described the second AC network/the first AC network from described the first AC network/the second AC network via described high voltage current changer group/low pressure set of converters and described low pressure set of converters/high voltage current changer group.
3. the device of the set of converters of multiplexing HVDC (High Voltage Direct Current) transmission system as claimed in claim 1 or 2, characterized by further comprising:
The measurement component that detects the direct voltage of the electric point of contact between described high voltage current changer group and described low pressure set of converters, it is arranged near the electric point of contact of described high voltage current changer group and described low pressure set of converters.
4. the device of the set of converters of multiplexing HVDC (High Voltage Direct Current) transmission system as claimed in claim 1 or 2, wherein said HVDC (High Voltage Direct Current) transmission system also comprises: detect the measurement component of the direct voltage of the primary importance of the DC bus of described HVDC (High Voltage Direct Current) transmission system, also comprise:
Second switch, it is connected across between first DC terminal and the DC bus of described HVDC (High Voltage Direct Current) transmission system of described current conversion station; With
Be connected across the 3rd switch between the second DC terminal of described high voltage current changer group and the 3rd coupling part of DC terminal of described low pressure set of converters and the primary importance of described DC bus.
5. the device of the set of converters of multiplexing HVDC (High Voltage Direct Current) transmission system as claimed in claim 4, is characterized in that:
Described the first switch closure;
Described second switch disconnects;
Described the 3rd switch closure;
Described high voltage current changer group is rectification unit/inversion unit;
Described low pressure set of converters is inversion unit/rectification unit; And
Active power transfers to described the second AC network/the first AC network from described the first AC network/the second AC network via described high voltage current changer group/low pressure set of converters and described low pressure set of converters/high voltage current changer group.
6. the device of the set of converters of multiplexing HVDC (High Voltage Direct Current) transmission system as claimed in claim 1 or 2, wherein said current conversion station also comprises:
The first smoothing reactor being electrically connected between the first DC terminal of described high voltage current changer group and first utmost point of the DC bus of described HVDC (High Voltage Direct Current) transmission system; With
The second smoothing reactor being electrically connected between the 4th DC terminal of described low pressure set of converters and second utmost point of the DC bus of described HVDC (High Voltage Direct Current) transmission system;
Wherein:
The two ends of described the first switch are respectively by described the first smoothing reactor and described the second smoothing reactor and the electrical connection of described current conversion station.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420216600.7U CN203859701U (en) | 2014-04-29 | 2014-04-29 | Device of converter set of reuse HVDC transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420216600.7U CN203859701U (en) | 2014-04-29 | 2014-04-29 | Device of converter set of reuse HVDC transmission system |
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| Publication Number | Publication Date |
|---|---|
| CN203859701U true CN203859701U (en) | 2014-10-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420216600.7U Expired - Lifetime CN203859701U (en) | 2014-04-29 | 2014-04-29 | Device of converter set of reuse HVDC transmission system |
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| Country | Link |
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| CN (1) | CN203859701U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104734205A (en) * | 2015-03-27 | 2015-06-24 | 国家电网公司 | Direct current voltage transformation controller based on DC /AC convertors |
-
2014
- 2014-04-29 CN CN201420216600.7U patent/CN203859701U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104734205A (en) * | 2015-03-27 | 2015-06-24 | 国家电网公司 | Direct current voltage transformation controller based on DC /AC convertors |
| CN104734205B (en) * | 2015-03-27 | 2018-01-19 | 国家电网公司 | A kind of direct current transformation controller based on DC/AC converters |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180528 Address after: Baden, Switzerland Patentee after: ABB Switzerland Co.,Ltd. Address before: Zurich Patentee before: ABB TECHNOLOGY Ltd. |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210510 Address after: Baden, Switzerland Patentee after: ABB grid Switzerland AG Address before: Baden, Switzerland Patentee before: ABB Switzerland Co.,Ltd. |
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| TR01 | Transfer of patent right | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Swiss Baden Patentee after: Hitachi energy Switzerland AG Address before: Swiss Baden Patentee before: ABB grid Switzerland AG |
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| CP01 | Change in the name or title of a patent holder | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20231219 Address after: Zurich, SUI Patentee after: Hitachi Energy Co.,Ltd. Address before: Swiss Baden Patentee before: Hitachi energy Switzerland AG |
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| TR01 | Transfer of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141001 |