CN201839219U - High-voltage DC (direct current) power transmission topological structure without transformer - Google Patents
High-voltage DC (direct current) power transmission topological structure without transformer Download PDFInfo
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- CN201839219U CN201839219U CN2010202680204U CN201020268020U CN201839219U CN 201839219 U CN201839219 U CN 201839219U CN 2010202680204 U CN2010202680204 U CN 2010202680204U CN 201020268020 U CN201020268020 U CN 201020268020U CN 201839219 U CN201839219 U CN 201839219U
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Abstract
The utility model relates to a high-voltage DC (direct current) power transmission topological structure without a transformer, which comprises a high-voltage charging circuit, an inductor, a rectifying circuit and an inverter circuit, wherein a high-voltage power grid enters a high-voltage frequency converter rectifying circuit after passing through the high-voltage charging circuit and the coupling or uncoupling inductor, DC voltage after being rectified is transmitted to the inverter circuit by a long-distance cable to supply power for the inverter circuit, and an inversion output end is accessed into the coupling or uncoupling inductor. The rectifying circuit, and a power unit of the inverter circuit have a half-bridge structure or an H-bridge structure. The topological structure enables high-voltage DC power transmission equipment to realize the aims of long-distance and large-capacity electric energy transmission without the transformer.
Description
Technical field
The utility model relates to a kind of high voltage direct current transmission topological structure, particularly a kind of transformerless high voltage direct current transmission topological structure.
Background technology
The particularity that China's energy resources and power load distribute becomes and develops certainty remote, large capacity transmission.Especially surpass the above long-distance transmission circuit of 600km, adopt more energy-conservation, the consumption reduction of high voltage direct current transmission, increase economic efficiency, realize energy resources in larger scope reasonable development, distribute rationally, meet the national conditions of China's " transferring electricity from the west to the east ".
Along with power electronics and computer technology rapid development, high voltage dc transmission technology is gradually improved, can compete with extra-high-voltage alternating current with sending on the electrical distance in ability to transmit electricity, and with respect to the ultra-high voltage AC transmission technology, high voltage dc transmission technology has following advantage:
When 1, carrying equal-wattage, the used wire rod of high voltage direct current transmission only is 2/3～1/2 of ac transmission;
2, in cable transmission line, high voltage direct current transmission does not have capacitance current to produce, and there is capacitance current in the high-voltage AC transmission circuit, causes loss;
3, at some special occasions, must use cable power transmission, when for example high voltage transmission line is through the big city, adopt underground cable; Power transmission line will be used submarine cable during through straits;
4, during high voltage direct current transmission, its both sides AC system does not need synchronous operation, and high-voltage AC transmission must synchronous operation;
5, the high voltage direct current transmission loss of breaking down is littler than high-voltage AC transmission.In the high voltage direct current transmission, owing to adopt thyristor installation, circuit power can be rapidly, regulate easily, do not carry short circuit current to the high-voltage alternating system that is short-circuited basically on the HVDC (High Voltage Direct Current) transmission line, and the short circuit current of fault top-cross streaming system is the same when not interconnecting.
At present, transformer is must an obligato part in all high-voltage direct-current transmission system, so transformer case is in whole high-voltage direct-current transmission system, the cost and the volume of very big proportion have been occupied, and the high voltage power transmission equipment that capacity is big more, its capacity requirement to transformer is also high more, makes the also straight line rising of cost of high-voltage direct-current transmission system like this.
The utility model content
The purpose of this utility model provides a kind of transformerless high voltage direct current transmission topological structure, and this topological structure makes high-voltage direct-current transmission system need not the purpose that transformer can be realized long distance, big capacity electric energy transmitting.
For achieving the above object, the utility model is achieved through the following technical solutions:
A kind of transformerless high voltage direct current transmission topological structure, it is characterized in that, comprise high-voltage charging circuit, inductance, rectification circuit, inverter circuit, high-voltage fence is directly through entering the high voltage converter rectification circuit after high-voltage charging circuit, coupling or the non-coupling inductance, it is the inverter circuit power supply that direct voltage after rectification is delivered to inverter circuit by the cable of growing distance, and inverting output terminal inserts coupling or non-coupling inductance.
The power cell of described rectification circuit, inverter circuit is the half-bridge structure that two IGBT switching devices are formed.
The power cell of described rectification circuit, inverter circuit is the H bridge construction that four IGBT switching devices are formed.
Described rectification circuit is identical with the power cell that inverter circuit adopts, but the phase trans-substitution.
Rectification circuit and inverter circuit are three-phase, whenever, form by an even number n power unit cascade, be divided into two groups up and down, every group power cell number is n/2, the input of the every phase of rectification circuit is the midpoint of two groups of unit, and is connected with coupling or non-coupling inductance between input and the every group of unit; The output of the every phase of inverter circuit is the midpoint of two groups of unit, and also is connected with coupling or non-coupling inductance between output and the every group of unit.
Compared with prior art, novelty of the present utility model and creativeness are embodied in:
1) high-voltage direct-current transmission system does not have transformer, has saved transformer case, makes cost reduce half at least;
2) high-voltage direct-current transmission system does not have transformer, has saved transformer case, makes volume reduce half at least, and floor space at the scene also so at least reduces half;
3) high-voltage direct-current transmission system does not have transformer, has saved transformer case, makes weight reduce half at least, and cost of transportation is also corresponding to be reduced;
4) high-voltage direct-current transmission system does not have transformer, has saved transformer case, and the structure of high-voltage direct-current transmission system is compared simple a lot, and the production cycle reduces half at least, also helps on-the-spot installation, debugging and maintenance;
5) high-voltage direct-current transmission system does not have transformer, has saved transformer case, has saved the energy consumption at transformer, need not to consider the temperature-rise effect of high-voltage direct-current transmission system on transformer yet;
6) high-voltage direct-current transmission system does not have transformer, has saved transformer case, has absolute market competitiveness advantage.
Description of drawings
Fig. 1 is the transformerless high voltage direct current transmission topology diagram that the semibridge system power cell is formed;
Fig. 2 is the transformerless high voltage direct current transmission topology diagram that H bridge-type power cell is formed;
Current direction figure in Fig. 3-1, Fig. 3-2, Fig. 3-3, Fig. 3 the-the 4th, semibridge system power cell;
Current direction figure in Fig. 4-1, Fig. 4-2, Fig. 4-3, Fig. 4 the-the 4th, H bridge-type power cell.
Embodiment
See Fig. 1, Fig. 2, a kind of transformerless high voltage direct current transmission topological structure, comprise high-voltage charging circuit, inductance L, rectification circuit, inverter circuit, high-voltage fence is directly through entering the high voltage converter rectification circuit behind high-voltage charging circuit, coupling or the non-coupling inductance L, it is the inverter circuit power supply that direct voltage after rectification is delivered to inverter circuit by the cable of growing distance, and inverting output terminal inserts coupling or non-coupling inductance L2.The high-voltage charging circuit is composed in parallel by charging resistor R and K switch M.
Rectification circuit and inverter circuit are three-phase, whenever, form by an even number n power unit cascade, be divided into two groups up and down, every group power cell number is n/2, the input of the every phase of rectification circuit is the midpoint of two groups of unit, and is connected with coupling or non-coupling inductance L1 between input and the every group of unit; The output of the every phase of inverter circuit is the midpoint of two groups of unit, and also is connected with coupling or non-coupling inductance L2 between output and the every group of unit.
The power cell of rectification circuit, inverter circuit can be the half-bridge structure (Fig. 1) that two IGBT switching devices are formed; Perhaps, the power cell of rectification circuit, inverter circuit is the H bridge construction (Fig. 2) that four IGBT switching devices are formed.
Form a three-phase controlled rectifier circuit, the capacitance voltage of constant each power cell by a plurality of power cells; The high voltage converter output inserts coupling inductance or non-coupling inductance, makes output waveform stable more level and smooth; Each rectification circuit, inverter circuit power cell adopt semibridge system or H bridge-type all can satisfy the demand that the PWM waveform generates; The power cell structure that rectification circuit and inverter circuit adopted can be designed in full accord, can call mutually.
See Fig. 3-1, electric current flows to B through IGBT2 from A, adopts the power cell output level " 0 " of half bridge inverter circuit.
See Fig. 3-2, electric current flows to A through sustained diode 2 from B, adopts the power cell output level " 0 " of half bridge inverter circuit.
See Fig. 3-3, electric current by dc bus capacitor C, flows to B from A again through sustained diode 1, adopts the power cell output level " 1 " of half bridge inverter circuit.
See Fig. 3-4, electric current by dc bus capacitor C, flows to A from B again through IGBT1, adopts the power cell output level " 1 " of half bridge inverter circuit.
See Fig. 4-1, electric current flows to A through IGBT2, dc bus capacitor C, IGBT3 from B, or electric current flows to B through sustained diode 3, dc bus capacitor C, sustained diode 2 from A, adopts the power cell output level " 1 " of H bridge inverter main circuit this moment.
See Fig. 4-2, electric current flows to A through sustained diode 1, IGBT3 from B, or electric current flows to B through sustained diode 3, IGBT1 from A, adopts the power cell output level " 0 " of H bridge inverter main circuit this moment.
See Fig. 4-3, electric current flows to A through IGBT2, sustained diode 4 from B, or electric current flows to B through IGBT4, sustained diode 2 from A, adopts the power cell output level " 0 " of H bridge inverter main circuit this moment.
See Fig. 4-4, electric current flows to A through sustained diode 1, dc bus capacitor C, sustained diode 4 from B, or electric current flows to B through IGBT4, dc bus capacitor C, IGBT1 from A, adopts the power cell output level " 1 " of H bridge inverter main circuit this moment.
High-voltage fence directly passes through high-voltage charging circuit and coupling or non-coupling inductance and enters the high voltage converter rectification circuit; Form a three-phase controlled rectification system by a plurality of power cells, the capacitance voltage of constant each power cell, thereby stable firmly voltage cable; The high voltage converter output inserts coupling inductance or non-coupling inductance, makes output waveform stable more level and smooth; Each power cell inverter circuit adopts semibridge system or H bridge-type all can satisfy the demand that the PWM waveform generates; The power cell structure that rectification circuit and inverter circuit adopted is in full accord, can call mutually.
Claims (5)
1. transformerless high voltage direct current transmission topological structure, it is characterized in that, comprise high-voltage charging circuit, inductance, rectification circuit, inverter circuit, high-voltage fence is directly through entering the high voltage converter rectification circuit after high-voltage charging circuit, coupling or the non-coupling inductance, it is the inverter circuit power supply that direct voltage after rectification is delivered to inverter circuit by the cable of growing distance, and inverting output terminal inserts coupling or non-coupling inductance.
2. a kind of transformerless high voltage direct current transmission topological structure according to claim 1 is characterized in that, the power cell of described rectification circuit, inverter circuit is the half-bridge structure that two IGBT switching devices are formed.
3. a kind of transformerless high voltage direct current transmission topological structure according to claim 1 is characterized in that, the power cell of described rectification circuit, inverter circuit is the H bridge construction that four IGBT switching devices are formed.
4. according to claim 2 or 3 described a kind of transformerless high voltage direct current transmission topological structures, it is characterized in that described rectification circuit is identical with the power cell structure that inverter circuit adopts, but the phase trans-substitution.
5. according to claim 2 or 3 described a kind of transformerless high voltage direct current transmission topological structures, it is characterized in that, rectification circuit and inverter circuit are three-phase, whenever, form by an even number n power unit cascade, be divided into two groups up and down, every group power cell number is n/2, and the input of the every phase of rectification circuit is the midpoint of two groups of unit, and between input and the every group of unit to be coupled or non-coupling inductance is connected; The output of the every phase of inverter circuit is the midpoint of two groups of unit, and also is connected with coupling or non-coupling inductance between output and the every group of unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202680204U CN201839219U (en) | 2010-07-22 | 2010-07-22 | High-voltage DC (direct current) power transmission topological structure without transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202680204U CN201839219U (en) | 2010-07-22 | 2010-07-22 | High-voltage DC (direct current) power transmission topological structure without transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201839219U true CN201839219U (en) | 2011-05-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202680204U Expired - Fee Related CN201839219U (en) | 2010-07-22 | 2010-07-22 | High-voltage DC (direct current) power transmission topological structure without transformer |
Country Status (1)
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| CN (1) | CN201839219U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102013819A (en) * | 2010-07-22 | 2011-04-13 | 荣信电力电子股份有限公司 | Transformer-free DC high-voltage transmission topological structure |
| CN103959624A (en) * | 2011-08-01 | 2014-07-30 | 阿尔斯通技术有限公司 | DC to DC converter assembly |
-
2010
- 2010-07-22 CN CN2010202680204U patent/CN201839219U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102013819A (en) * | 2010-07-22 | 2011-04-13 | 荣信电力电子股份有限公司 | Transformer-free DC high-voltage transmission topological structure |
| WO2012010066A1 (en) * | 2010-07-22 | 2012-01-26 | 荣信电力电子股份有限公司 | Transformerless high voltage direct current transmission topological structure |
| CN103959624A (en) * | 2011-08-01 | 2014-07-30 | 阿尔斯通技术有限公司 | DC to DC converter assembly |
| CN103959624B (en) * | 2011-08-01 | 2016-10-19 | 阿尔斯通技术有限公司 | DC-to-DC converter assembly |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110518 Termination date: 20130722 |