CN203839972U - Parallel type tripolar direct-current power transmission circuit - Google Patents
Parallel type tripolar direct-current power transmission circuit Download PDFInfo
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- CN203839972U CN203839972U CN201420246192.XU CN201420246192U CN203839972U CN 203839972 U CN203839972 U CN 203839972U CN 201420246192 U CN201420246192 U CN 201420246192U CN 203839972 U CN203839972 U CN 203839972U
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 39
- 238000006243 chemical reaction Methods 0.000 claims description 63
- 230000007935 neutral effect Effects 0.000 claims description 18
- 239000003990 capacitor Substances 0.000 claims description 3
- 102100027310 Bromodomain adjacent to zinc finger domain protein 1A Human genes 0.000 abstract 1
- 101000937778 Homo sapiens Bromodomain adjacent to zinc finger domain protein 1A Proteins 0.000 abstract 1
- 101100172294 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) ACF2 gene Proteins 0.000 abstract 1
- 230000008901 benefit Effects 0.000 description 6
- 238000011217 control strategy Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000005611 electricity Effects 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 239000003245 coal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
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- 239000000203 mixture Substances 0.000 description 1
- 230000005404 monopole Effects 0.000 description 1
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- 230000001737 promoting effect Effects 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
Abstract
The utility model relates to a parallel type tripolar direct-current power transmission circuit. The parallel type tripolar direct-current power transmission circuit is used for connecting a transmitting-end alternating current power grid with a receiving-end alternating current power grid. The parallel type tripolar direct-current power transmission circuit includes a pole 1 circuit, a pole 2 circuit and a pole 3 circuit, an alternating current filter ACF1, an alternating current filter ACF2, a reactive power compensation device QC1 and a reactive power compensation device QC2; the input end of the pole 1 circuit is connected with a positive pole of the transmitting-end alternating current power grid; the output end of the pole 1 circuit is connected with a positive pole of the receiving-end alternating current power grid; the input end of the pole 2 circuit is connected with a negative pole of the transmitting-end alternating current power grid; the output end of the pole 2 circuit is connected with a negative pole of the receiving-end alternating current power grid; the input end of the pole 3 circuit is connected with a third pole of the transmitting-end alternating current power grid; and the output end of the pole 3 circuit is connected with a third pole of the receiving-end alternating current power grid. Compared with the prior art, the parallel type tripolar direct-current power transmission circuit of the utility model can assist in increasing transmission capacity of lines, fully utilizing towers of original lines and saving investment.
Description
Technical field
The utility model relates to a kind of direct current transportation circuit, especially relates to a kind of parallel three utmost point direct current transportation circuit.
Background technology
Along with the further deep development of Southwestern China water power, northwest coal electricity and external Energy Base, the sustainable development of national economy simultaneously, inevitable more and more higher to the requirement of electric network performance, to provide enough electric energy on the one hand, to ensure the quality of power supply on the one hand.Promoting the transmission capacity of electrical network and the safe and stable operation ability of electrical network is an imperative job.Existing transmission line of alternation current is transformed into after high voltage direct current three utmost point transmission systems, still uses original transmission line and insulator arrangement, the transmission line capability of system will improve greatly; And at the aspect of performance of system safety stable operation, AC transmission system transform DC transmission system as, system short circuit capacity reduces, and the tolerance that the flexible operational mode of three utmost point direct currents breaks down to its a certain utmost point is larger, and as direct current system, the advantages such as its quick controllability are also incited somebody to action elevator system performance greatly.Visible, high voltage direct current three utmost point technology of transmission of electricitys have not only promoted systematic function, and the advantage that possesses skills is also reduced investment outlay simultaneously, has brought economic benefit.
With conventional high voltage direct current transmission comparison, the high voltage direct current three utmost points maximum difference of transmitting electricity is that great changes have occurred topological structure, therefore need circuit structure and control strategy and the operation principle of three utmost point transmissions of electricity of appropriate design high voltage direct current, can either be that former circuit transmission capacity increases, the steel tower that can make full use of again former circuit, has economic advantages.
Chinese patent 201310606681.1 discloses a kind of transmission system that adopts non-sine ac transmission to promote urban distribution network conveying capacity, described system comprises the first waveform converting system and the 3rd waveform transformation system that sine wave are converted to alternation square wave, alternation square wave is converted to sinusoidal wave the second waveform converting system and the 4th waveform transformation system, and this invention is because adopting ac transmission to exist low-frequency oscillation aggravation, fault the problem such as to transmit on a large scale.
Summary of the invention
The purpose of this utility model is exactly to provide one to have the circuit of increasing transmission capacity in order to overcome the defect that above-mentioned prior art exists, and makes full use of the steel tower of former circuit, parallel three utmost point direct current transportation circuit of the advantage such as reduce investment outlay.
The purpose of this utility model can be achieved through the following technical solutions:
A kind of parallel three utmost point direct current transportation circuit, for connecting sending end AC network and receiving end AC network, comprise the utmost point 1 circuit, the utmost point 2 circuit, the utmost point 3 circuit, alternating current filter ACF
1, alternating current filter ACF
2, reactive-load compensation equipment Q
c1with reactive-load compensation equipment Q
c2the input of the described utmost point 1 circuit connects the positive pole of sending end AC network, output connects the positive pole of receiving end AC network, the input of the described utmost point 2 circuit connects the negative pole of sending end AC network, output connects the negative pole of receiving end AC network, the input of the described utmost point 3 circuit connects the 3rd utmost point of sending end AC network, and output connects the 3rd utmost point of receiving end AC network, described alternating current filter ACF
1with reactive-load compensation equipment Q
c1one end connect respectively the output of sending end AC network, the other end connects respectively the earth, described alternating current filter ACF
2with reactive-load compensation equipment Q
c2one end connect respectively the input of receiving end AC network, the other end connects respectively the earth.
The described utmost point 1 circuit comprises converter transformer T
11, converter transformer T
12, 12 pulse conversion device 2p
11with 12 pulse conversion device 2p
12, described converter transformer T
11input connect the positive pole of sending end AC network, output connects 12 pulse conversion device 2p
11anode, 12 described pulse conversion device 2p
11negative electrode connect 12 pulse conversion device 2p by the utmost point 1 DC power transmission line
12anode, neutral point connects respectively the earth and the utmost point 2 circuit, 12 described pulse conversion device 2p
12negative electrode connect converter transformer T
12input, neutral point connects and meets respectively the earth and the utmost point 2 circuit, described converter transformer T
12output connect the positive pole of receiving end AC network.
The described utmost point 2 circuit comprise converter transformer T
21, converter transformer T
22, 12 pulse conversion device 2p
21with 12 pulse conversion device 2p
22, described converter transformer T
21input connect the negative pole of sending end AC network, output connects 12 pulse conversion device 2p
21anode, 12 described pulse conversion device 2p
21negative electrode connect 12 pulse conversion device 2p by the utmost point 2 DC power transmission line
22anode, neutral point connects respectively the earth and 12 pulse conversion device 2p
11neutral point, 12 described pulse conversion device 2p
22negative electrode connect converter transformer T
22input, neutral point connects respectively the earth and 12 pulse conversion device 2p
12neutral point, described converter transformer T
22output connect the negative pole of receiving end AC network.
The described utmost point 3 circuit comprise converter transformer T
31, converter transformer T
32, 12 pulse conversion device 2p
31with 12 pulse conversion device 2p
32, described converter transformer T
31input connect the 3rd utmost point of sending end AC network, output connects 12 pulse conversion device 2p
31anode, 12 described pulse conversion device 2p
31negative electrode connect 12 pulse conversion device 2p by the utmost point 3 DC power transmission line
32anode, neutral point connect the earth, 12 described pulse conversion device 2p
32negative electrode connect converter transformer T
32input, neutral point connect the earth, described converter transformer T
32output connect the 3rd utmost point of receiving end AC network.
Described reactive-load compensation equipment adopts power factor correction capacitor series connection low tension reactor.
Described alternating current filter adopts HP12/24 double-tuned filter or HP3 single tuned filter.
Compared with prior art, the utlity model has following advantage:
1) the utility model has adopted 12 pulse conversion devices to remove the harmonic current that rectifier produces.Because rectifier is being converted to alternating current the galvanic while, produce a large amount of harmonic current injections in electrical network, the thing followed is exactly the impact that harmonic current produces other load in electrical network, adopts 12 pulse converters can eliminate H5, H7 subharmonic.
2) the utility model adopts parallel three utmost point direct current transportation topological structures, form conventional bipolar DC and monopolar ground return DC parallel operational mode, compatibilization effect is good, operational mode is flexible, because conventional bipolar DC is pressed utmost point configuration control protection system, therefore conventional bipolar DC has identical control strategy with conventional monopolar ground return direct current, can continue the DC control that follows conventional lines: rectifier is determined Current Control, inverter closes angle of rupture control, the minimum trigger angle restriction of rectifier and inverter determine Current Control, and the VDCOL of both sides current conversion station restriction, isochrone pipeline equipment utilance is high, invest moderate.
Brief description of the drawings
Fig. 1 is parallel three utmost point direct current transportation circuit diagrams;
Fig. 2 is HP12/24 double-tuned filter topology diagram;
Fig. 3 is HP3 single tuned filter topology diagram;
Fig. 4 is conventional direct current transportation control characteristic of steady state schematic diagram.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is elaborated.The present embodiment is implemented as prerequisite taking technical solutions of the utility model, provided detailed execution mode and concrete operating process, but protection range of the present utility model is not limited to following embodiment.
As shown in Figure 1, a kind of parallel three utmost point direct current transportation circuit, for connecting sending end AC network and receiving end AC network, comprise the utmost point 1 circuit, the utmost point 2 circuit, the utmost point 3 circuit, alternating current filter ACF
1, alternating current filter ACF
2, reactive-load compensation equipment Q
c1with reactive-load compensation equipment Q
c2the input of the utmost point 1 circuit connects the positive pole of sending end AC network, output connects the positive pole of receiving end AC network, the input of the utmost point 2 circuit connects the negative pole of sending end AC network, output connects the negative pole of receiving end AC network, the input of the utmost point 3 circuit connects the 3rd utmost point of sending end AC network, and output connects the 3rd utmost point of receiving end AC network, alternating current filter ACF
1with reactive-load compensation equipment Q
c1one end connect respectively the output of sending end AC network, the other end connects respectively the earth, alternating current filter ACF
2with reactive-load compensation equipment Q
c2one end connect respectively the input of receiving end AC network, the other end connects respectively the earth.
The utmost point 1 circuit comprises converter transformer T
11, converter transformer T
12, 12 pulse conversion device 2p
11with 12 pulse conversion device 2p
12, converter transformer T
11input connect the positive pole of sending end AC network, output connects 12 pulse conversion device 2p
11anode, 12 pulse conversion device 2p
11negative electrode connect 12 pulse conversion device 2p by the utmost point 1 DC power transmission line
12anode, neutral point connects respectively the earth and the utmost point 2 circuit, 12 pulse conversion device 2p
12negative electrode connect converter transformer T
12input, neutral point connects and meets respectively the earth and the utmost point 2 circuit, converter transformer T
12output connect the positive pole of receiving end AC network.
The utmost point 2 circuit comprise converter transformer T
21, converter transformer T
22, 12 pulse conversion device 2p
21with 12 pulse conversion device 2p
22, converter transformer T
21input connect the negative pole of sending end AC network, output connects 12 pulse conversion device 2p
21anode, 12 pulse conversion device 2p
21negative electrode connect 12 pulse conversion device 2p by the utmost point 2 DC power transmission line
22anode, neutral point connects respectively the earth and 12 pulse conversion device 2p
11neutral point, 12 pulse conversion device 2p
22negative electrode connect converter transformer T
22input, neutral point connects respectively the earth and 12 pulse conversion device 2p
12neutral point, converter transformer T
22output connect the negative pole of receiving end AC network.
The utmost point 3 circuit comprise converter transformer T
31, converter transformer T
32, 12 pulse conversion device 2p
31with 12 pulse conversion device 2p
32, converter transformer T
31input connect the 3rd utmost point of sending end AC network, output connects 12 pulse conversion device 2p
31anode, 12 pulse conversion device 2p
31negative electrode connect 12 pulse conversion device 2p by the utmost point 3 DC power transmission line
32anode, neutral point connect the earth, 12 pulse conversion device 2p
32negative electrode connect converter transformer T
32input, neutral point connect the earth, converter transformer T
32output connect the 3rd utmost point of receiving end AC network.
Reactive-load compensation equipment adopts power factor correction capacitor series connection low tension reactor.
Alternating current filter adopts HP12/24 double-tuned filter or HP3 single tuned filter, as shown in Figure 2,3.
Transmission line of alternation current is transform as after parallel three utmost point direct current transportation, form conventional bipolar DC and monopolar ground return DC parallel operational mode, therefore bipolar DC and one pole direct current are all according to the mode of operation operation of conventional direct current.
Because conventional bipolar DC is pressed utmost point configuration control protection system; therefore conventional bipolar DC has identical control strategy with conventional monopolar ground return direct current; be: rectifier is determined Current Control, inverter closes angle of rupture control; take into account the Current Control of determining of the minimum trigger angle restriction of rectifier and inverter, and the VDCOL of both sides current conversion station limits simultaneously.Under this control strategy regulates, DC transmission system control characteristic of steady state as shown in Figure 4.
Suppose: the rated direct current of every polar curve with exchange that rated current equates, DC rated voltage is with to exchange rated line voltage equal.In the time disregarding circuit overload ability, the specified direct current transmission capacity of parallel three utmost point DC transmission system is
In formula, exchange specified transmission power
Formula (1) shows, in the time disregarding circuit overload ability, the specified direct current transmission capacity of parallel three utmost point DC transmission system is for exchanging 1.73 times of specified transmission power.
There are following 3 class operational modes in the utility model, in the time disregarding anti-power delivery and brownout operation, has following characteristics:
1) three utmost point operational modes; Adopt constant DC current control pattern, wherein the two poles of the earth composition bipolar DC arbitrarily, bipolar operation routinely, the 3rd monopolar ground return operational mode very.
2) bipolar operational mode; Adopt conventional constant DC current control pattern.When normal operation, the utmost point 3 is as metallic return, without earth current; In the time of the utmost point 1 or the utmost point 2 line fault, the utmost point 3 replaces fault polar curve, and now earth current is the bipolar uneven direct current of not enough rated current 1%.
3) monopole operating mode; The conventional constant DC current control pattern of same employing, is used two polar curves, and wherein a polar curve, as metallic return, does not exist earth current.
As can be seen here, there are 3 class operational modes in parallel three utmost point DC transmission system, has 9 kinds of concrete operational modes (disregarding anti-power delivery and brownout operation).
Claims (6)
1. parallel three utmost point direct current transportation circuit, for connecting sending end AC network and receiving end AC network, is characterized in that, comprise the utmost point 1 circuit, the utmost point 2 circuit, the utmost point 3 circuit, alternating current filter ACF
1, alternating current filter ACF
2, reactive-load compensation equipment Q
c1with reactive-load compensation equipment Q
c2the input of the described utmost point 1 circuit connects the positive pole of sending end AC network, output connects the positive pole of receiving end AC network, the input of the described utmost point 2 circuit connects the negative pole of sending end AC network, output connects the negative pole of receiving end AC network, the input of the described utmost point 3 circuit connects the 3rd utmost point of sending end AC network, and output connects the 3rd utmost point of receiving end AC network, described alternating current filter ACF
1with reactive-load compensation equipment Q
c1one end connect respectively the output of sending end AC network, the other end connects respectively the earth, described alternating current filter ACF
2with reactive-load compensation equipment Q
c2one end connect respectively the input of receiving end AC network, the other end connects respectively the earth.
2. parallel three utmost point direct current transportation circuit of one according to claim 1, is characterized in that, the described utmost point 1 circuit comprises converter transformer T
11, converter transformer T
12, 12 pulse conversion device 2p
11with 12 pulse conversion device 2p
12, described converter transformer T
11input connect the positive pole of sending end AC network, output connects 12 pulse conversion device 2p
11anode, 12 described pulse conversion device 2p
11negative electrode connect 12 pulse conversion device 2p by the utmost point 1 DC power transmission line
12anode, neutral point connects respectively the earth and the utmost point 2 circuit, 12 described pulse conversion device 2p
12negative electrode connect converter transformer T
12input, neutral point connects and meets respectively the earth and the utmost point 2 circuit, described converter transformer T
12output connect the positive pole of receiving end AC network.
3. parallel three utmost point direct current transportation circuit of one according to claim 2, is characterized in that, the described utmost point 2 circuit comprise converter transformer T
21, converter transformer T
22, 12 pulse conversion device 2p
21with 12 pulse conversion device 2p
22, described converter transformer T
21input connect the negative pole of sending end AC network, output connects 12 pulse conversion device 2p
21anode, 12 described pulse conversion device 2p
21negative electrode connect 12 pulse conversion device 2p by the utmost point 2 DC power transmission line
22anode, neutral point connects respectively the earth and 12 pulse conversion device 2p
11neutral point, 12 described pulse conversion device 2p
22negative electrode connect converter transformer T
22input, neutral point connects respectively the earth and 12 pulse conversion device 2p
12neutral point, described converter transformer T
22output connect the negative pole of receiving end AC network.
4. parallel three utmost point direct current transportation circuit of one according to claim 1, is characterized in that, the described utmost point 3 circuit comprise converter transformer T
31, converter transformer T
32, 12 pulse conversion device 2p
31with 12 pulse conversion device 2p
32, described converter transformer T
31input connect the 3rd utmost point of sending end AC network, output connects 12 pulse conversion device 2p
31anode, 12 described pulse conversion device 2p
31negative electrode connect 12 pulse conversion device 2p by the utmost point 3 DC power transmission line
32anode, neutral point connect the earth, 12 described pulse conversion device 2p
32negative electrode connect converter transformer T
32input, neutral point connect the earth, described converter transformer T
32output connect the 3rd utmost point of receiving end AC network.
5. parallel three utmost point direct current transportation circuit of one according to claim 1, is characterized in that, described reactive-load compensation equipment adopts power factor correction capacitor series connection low tension reactor.
6. parallel three utmost point direct current transportation circuit of one according to claim 1, is characterized in that, described alternating current filter adopts HP12/24 double-tuned filter or HP3 single tuned filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420246192.XU CN203839972U (en) | 2014-05-14 | 2014-05-14 | Parallel type tripolar direct-current power transmission circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420246192.XU CN203839972U (en) | 2014-05-14 | 2014-05-14 | Parallel type tripolar direct-current power transmission circuit |
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| CN203839972U true CN203839972U (en) | 2014-09-17 |
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|---|---|---|---|
| CN201420246192.XU Expired - Lifetime CN203839972U (en) | 2014-05-14 | 2014-05-14 | Parallel type tripolar direct-current power transmission circuit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106936140A (en) * | 2015-12-30 | 2017-07-07 | 国网辽宁省电力有限公司电力科学研究院 | The reactive-load adjusting device and method coordinated based on flexible direct current and high-voltage parallel electric capacity |
| CN108141041A (en) * | 2015-06-30 | 2018-06-08 | Abb瑞士股份有限公司 | Power transmitting device and the method for operating power transmitting device |
| CN108964111A (en) * | 2018-08-22 | 2018-12-07 | 国家电网有限公司 | A kind of DC transmission system and its control method with medium voltage side direct current outlet |
-
2014
- 2014-05-14 CN CN201420246192.XU patent/CN203839972U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108141041A (en) * | 2015-06-30 | 2018-06-08 | Abb瑞士股份有限公司 | Power transmitting device and the method for operating power transmitting device |
| CN108141041B (en) * | 2015-06-30 | 2020-03-06 | Abb瑞士股份有限公司 | Power transmission device and method for operating a power transmission device |
| CN106936140A (en) * | 2015-12-30 | 2017-07-07 | 国网辽宁省电力有限公司电力科学研究院 | The reactive-load adjusting device and method coordinated based on flexible direct current and high-voltage parallel electric capacity |
| CN106936140B (en) * | 2015-12-30 | 2020-08-04 | 国网辽宁省电力有限公司电力科学研究院 | Reactive power adjusting device and method based on cooperation of flexible direct current and high-voltage parallel capacitor |
| CN108964111A (en) * | 2018-08-22 | 2018-12-07 | 国家电网有限公司 | A kind of DC transmission system and its control method with medium voltage side direct current outlet |
| CN108964111B (en) * | 2018-08-22 | 2020-06-30 | 国家电网有限公司 | Direct-current power transmission system with medium-voltage side direct-current outgoing line and control method thereof |
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