CN112217403A - Extra-high voltage flexible direct current conversion unit arrangement structure with bridge arm reactor on direct current side - Google Patents
Extra-high voltage flexible direct current conversion unit arrangement structure with bridge arm reactor on direct current side Download PDFInfo
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- CN112217403A CN112217403A CN202011092270.1A CN202011092270A CN112217403A CN 112217403 A CN112217403 A CN 112217403A CN 202011092270 A CN202011092270 A CN 202011092270A CN 112217403 A CN112217403 A CN 112217403A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/003—Constructional details, e.g. physical layout, assembly, wiring or busbar connections
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
- H02M7/53871—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration with automatic control of output voltage or current
- H02M7/53875—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration with automatic control of output voltage or current with analogue control of three-phase output
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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]
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Abstract
The invention discloses an arrangement structure of an extra-high voltage flexible direct current conversion unit with a bridge arm reactor on a direct current side, and relates to the technical field of flexible direct current transmission converter station engineering. The system comprises a valve hall, a flexible-direct transformer, a starting loop, electrical equipment and a bridge arm reactor; the electrical equipment comprises converter valve net side equipment, a flexible direct current converter valve, converter valve direct current side equipment and a direct current wall bushing. The bridge arm reactor is arranged outside the valve hall, so that the size of the valve hall can be obviously reduced, the engineering investment of each extra-high voltage high-end flexible straight valve hall can be saved by about 1300 ten thousand yuan, and the heating of a steel structure of the valve hall caused by the electromagnetic induction of the bridge arm reactor can be avoided.
Description
Technical Field
The invention relates to the technical field of flexible direct current transmission converter station engineering, in particular to an extra-high voltage flexible direct current conversion unit arrangement structure with a bridge arm reactor on a direct current side.
Background
Compared with the traditional direct current transmission, the flexible direct current transmission (flexible direct current transmission for short) has the advantages of no need of reactive compensation, no risk of commutation failure, capability of supplying power to a passive system, independent control of active power and reactive power, low harmonic level, easiness in forming a multi-terminal direct current system, small floor area and the like; the ultra-high voltage direct current transmission is an engineering technology with unique advantages in the aspect of realizing long-distance and high-capacity power transmission; the extra-high voltage direct current transmission technology adopting the flexible direct current conversion unit has the advantages of the extra-high voltage direct current transmission technology and the flexible direct current conversion unit.
The flexible direct current conversion unit in the extra-high voltage flexible direct current conversion station is a core component of an extra-high voltage flexible direct current transmission technology with the voltage class of +/-800 kV or above; however, the existing flexible direct current converter station arrangement structure is only suitable for flexible direct current transmission projects with voltage grades lower than +/-500 kV, smaller equipment size and low requirement on electrical clear distance, and has limited reference value for extra-high voltage flexible direct current transmission projects with voltage grades of +/-800 kV and above; in addition, according to the performance requirements of the extra-high voltage flexible direct current transmission system with the voltage of +/-800 kV and above, a bridge arm reactor of the flexible direct current converter unit may be required to be arranged on the direct current side of the converter valve, and the existing arrangement structure of the flexible direct current converter station cannot meet the requirements. The electrical arrangement structure of the extra-high voltage flexible direct current conversion unit greatly determines the arrangement scheme of the whole converter station, so that the technical scheme and even the manufacturing cost of the whole project are influenced.
At present, an extra-high voltage flexible direct current transmission technology is starting initially, and no reference engineering experience can be used for reference of an extra-high voltage flexible direct current conversion unit.
Therefore, it is necessary to develop an extra-high voltage flexible direct current conversion unit arrangement structure with the bridge arm reactor on the direct current side.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides an extra-high voltage flexible direct current conversion unit arrangement structure of a bridge arm reactor on a direct current side.
In order to achieve the purpose, the technical scheme of the invention is as follows: the extra-high voltage flexible direct current conversion unit arrangement structure of the bridge arm reactor on the direct current side is characterized in that: the system comprises a valve hall, a flexible-direct transformer, a starting loop, electrical equipment and an arm reactor, wherein the flexible-direct transformer is positioned outside the valve hall, the starting loop is positioned outside the valve hall and is electrically connected with the flexible-direct transformer, the electrical equipment is positioned in the valve hall and is electrically connected with the flexible-direct transformer, and the arm reactor is positioned outside the valve hall and is electrically connected with the electrical equipment;
the electrical equipment comprises converter valve net side equipment, a flexible direct current converter valve, converter valve direct current side equipment and a direct current wall bushing; the high-pressure end of the valve side of the flexible-direct transformer is inserted into the valve hall and is electrically connected with the converter valve network side equipment; the converter valve network side equipment is electrically connected with a flexible straight converter valve alternating current side wiring terminal; the flexible direct-current side wiring terminal of the converter valve is electrically connected with direct-current side equipment of the converter valve; one end of the direct current wall bushing is inserted into the valve hall and is electrically connected with direct current side equipment of the converter valve, and the other end of the direct current wall bushing is electrically connected with the bridge arm reactor.
In the above technical solution, the flexible-direct transformers are three-phase, and each phase of flexible-direct transformer is electrically connected to the corresponding start-up loop.
In the technical scheme, the converter valve network side equipment is three-phase;
the flexible straight converter valve comprises an upper bridge arm converter valve and a lower bridge arm converter valve, wherein the upper bridge arm converter valve and the lower bridge arm converter valve are both three-phase, the three-phase upper bridge arm converter valves are sequentially arranged, and the three-phase lower bridge arm converter valves are sequentially arranged;
the direct current side equipment of the converter valve comprises upper bridge arm converter valve direct current side equipment and lower bridge arm converter valve direct current side equipment, wherein the upper bridge arm converter valve direct current side equipment and the lower bridge arm converter valve direct current side equipment are both three-phase, the three-phase upper bridge arm converter valve direct current side equipment is sequentially arranged, and the three-phase lower bridge arm converter valve direct current side equipment is sequentially arranged;
the direct-current wall bushing comprises an upper bridge arm direct-current wall bushing and a lower bridge arm direct-current wall bushing, the upper bridge arm direct-current wall bushing and the lower bridge arm direct-current wall bushing are both three-phase, the three-phase upper bridge arm direct-current wall bushings are sequentially arranged, and the three-phase lower bridge arm direct-current wall bushings are sequentially arranged;
the bridge arm reactors comprise an upper bridge arm reactor and a lower bridge arm reactor, the upper bridge arm reactors and the lower bridge arm reactors are three-phase, the three-phase upper bridge arm reactors are sequentially arranged, and the three-phase lower bridge arm reactors are sequentially arranged.
In the above technical scheme, the electrical equipment further comprises an incoming line phase-change transition bus, wherein the incoming line phase-change transition bus is three-phase; and each phase of converter valve network side equipment is electrically connected with the flexible straight converter valve alternating current side wiring terminal through the corresponding incoming line phase change transition bus.
In the technical scheme, the converter valve network side equipment comprises a converter valve network side lightning arrester, a converter valve network side voltage measuring device, a converter valve network side isolating switch and a converter valve network side current measuring device; the converter valve network side lightning arrester and the converter valve network side voltage measuring device are connected in parallel between a flexible-direct transformer valve side high-voltage end and a main ground network and are electrically connected with a static contact of a converter valve network side isolating switch; and the converter valve network side current measuring device is connected in series between the converter valve network side isolating switch and the incoming line phase change transition bus.
In the above technical solution, the electrical equipment further includes a soft direct current valve lightning arrester, and the soft direct current valve lightning arrester is three-phase; one end of the flexible direct current converter valve arrester is electrically connected with the alternating current side of the upper bridge arm converter valve, and the other end of the flexible direct current converter valve arrester is electrically connected with the direct current side of the upper bridge arm converter valve.
In the above technical scheme, the upper bridge arm converter valve dc side equipment includes an upper bridge arm dc side current measuring device and an upper bridge arm dc side grounding switch, and the lower bridge arm converter valve dc side equipment includes a lower bridge arm dc side current measuring device and a lower bridge arm dc side grounding switch.
In the technical scheme, one end of the upper bridge arm direct-current wall bushing is inserted into the valve hall and is electrically connected with the direct-current side equipment of the upper bridge arm converter valve, and the other end of the upper bridge arm direct-current wall bushing is electrically connected with the upper bridge arm reactor; one end of the lower bridge arm direct-current wall bushing is inserted into the valve hall and is electrically connected with the direct-current side equipment of the lower bridge arm converter valve, and the other end of the lower bridge arm direct-current wall bushing is electrically connected with the lower bridge arm reactor.
In the above technical scheme, each phase of the upper bridge arm reactor is electrically connected with the corresponding lower bridge arm reactor.
In the technical scheme, the three-phase flexible-direct transformers are connected in a star shape through neutral point buses of the flexible-direct transformers; the converter valve network side lightning arrester and the converter valve network side voltage measuring device are arranged in a floor mode, the converter valve network side isolating switch is horizontally telescopic, and the converter valve network side current measuring device is arranged in an inverted suspension mode; the incoming line phase-change transition bus adopts a suspension pipe bus arrangement form; the upper bridge arm converter valve and the lower bridge arm converter valve are arranged in parallel; the flexible direct-current valve lightning arrester is arranged in a hanging manner, and the three-phase flexible direct-current valve lightning arresters are arranged in parallel; an upper bridge arm direct current side current measuring device is connected in series in a loop connecting the flexible direct current converter valve arrester and the upper bridge arm converter valve; the direct-current side current measuring device of the upper bridge arm is in an inverted suspension type arrangement, the direct-current side current measuring device of the lower bridge arm is in a floor type and a forward suspension type arrangement, and the direct-current side grounding switch of the upper bridge arm and the direct-current side grounding switch of the lower bridge arm are in a vertical telescopic type floor type arrangement; the upper bridge arm direct-current wall bushing and the lower bridge arm direct-current wall bushing are arranged in parallel; the upper bridge arm reactor and the lower bridge arm reactor are arranged in a triangular mode.
Compared with the prior art, the invention has the following advantages:
1) the bridge arm reactor is arranged on the direct current side of the flexible direct current converter valve, so that the rising rate of the valve tower fault current when the relative short circuit between the flexible direct current converter valve and the bridge arm reactor is failed is reduced from more than 12A/mu s to less than 3A/mu s, the transient current limit value of the IGBT needing to be turned off in the protection action time of 200 mu s is reduced by 75%, and the running risk of a flexible direct current transmission system is further reduced.
2) The bridge arm reactors are arranged outside the valve halls, so that the sizes of the valve halls can be obviously reduced, the engineering investment of each extra-high voltage high-end flexible straight valve hall can be saved by about 1300 ten thousand yuan, and the heating of a steel structure of the valve halls caused by the electromagnetic induction of the bridge arm reactors can be avoided; the bridge arm reactors are arranged in a three-phase triangle, and the space magnetic fields are partially offset, so that the electromagnetic environment control in the station is facilitated.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Detailed Description
The embodiments of the present invention will be described in detail with reference to the accompanying drawings, which are not intended to limit the present invention, but are merely exemplary. While the advantages of the invention will be apparent and readily appreciated by the description.
With reference to the accompanying drawings: the extra-high voltage flexible direct current conversion unit arrangement structure of the bridge arm reactor on the direct current side is characterized in that: the system comprises a valve hall 1, a flexible-direct transformer 2 positioned outside the valve hall 1, a starting loop 3 positioned outside the valve hall 1 and electrically connected with the flexible-direct transformer 2, electrical equipment 4 positioned inside the valve hall 1 and electrically connected with the flexible-direct transformer 2, and an arm reactor 5 positioned outside the valve hall 1 and electrically connected with the electrical equipment 4;
the electrical equipment 4 comprises a converter valve net side device 41, a flexible direct current converter valve 42, a converter valve direct current side device 43 and a direct current wall bushing 44; the high-pressure end of the valve side of the flexible-straight transformer 2 is inserted into the valve hall 1 and is electrically connected with the converter valve network side equipment 41; the converter valve network side equipment 41 is electrically connected with an alternating current side wiring terminal of the flexible direct converter valve 42; the direct-current side wiring terminal of the flexible direct-current converter valve 42 is electrically connected with direct-current side equipment 43 of the converter valve; one end of the direct current wall bushing 44 is inserted into the valve hall 1 and electrically connected with the direct current side equipment 43 of the converter valve, and the other end of the direct current wall bushing is electrically connected with the bridge arm reactor 5.
The flexible direct transformer 2 is three-phase, and each phase of flexible direct transformer 2 is electrically connected with the corresponding starting loop 3.
The converter valve network side device 41 is three-phase;
the flexible straight converter valve 42 comprises an upper bridge arm converter valve 421 and a lower bridge arm converter valve 422, the upper bridge arm converter valve 421 and the lower bridge arm converter valve 422 are both three-phase, the three-phase upper bridge arm converter valves 421 are sequentially arranged, and the three-phase lower bridge arm converter valves 422 are sequentially arranged;
the converter valve direct-current side equipment 43 comprises upper bridge arm converter valve direct-current side equipment 431 and lower bridge arm converter valve direct-current side equipment 432, the upper bridge arm converter valve direct-current side equipment 431 and the lower bridge arm converter valve direct-current side equipment 432 are three phases, the three-phase upper bridge arm converter valve direct-current side equipment 431 are arranged in sequence, and the three-phase lower bridge arm converter valve direct-current side equipment 432 is arranged in sequence;
the direct-current wall bushing 44 comprises an upper bridge arm direct-current wall bushing 441 and a lower bridge arm direct-current wall bushing 442, the upper bridge arm direct-current wall bushing 441 and the lower bridge arm direct-current wall bushing 442 are three-phase, the three-phase upper bridge arm direct-current wall bushings 441 are sequentially arranged, and the three-phase lower bridge arm direct-current wall bushings 442 are sequentially arranged;
the bridge arm reactors 5 include upper bridge arm reactors 51 and lower bridge arm reactors 52, the upper bridge arm reactors 51 and the lower bridge arm reactors 52 are three-phase, the three-phase upper bridge arm reactors 51 are sequentially arranged, and the three-phase lower bridge arm reactors 52 are sequentially arranged.
The electrical equipment 4 further comprises an incoming line phase change transition bus 46, wherein the incoming line phase change transition bus 46 is three-phase; and each phase of converter valve network side equipment 41 is electrically connected with an alternating current side wiring terminal of the flexible straight converter valve 42 through a corresponding incoming line phase change transition bus 46.
The converter valve network side device 41 comprises a converter valve network side lightning arrester 411, a converter valve network side voltage measuring device 412, a converter valve network side isolating switch 413 and a converter valve network side current measuring device 414; the converter valve network side lightning arrester 411 and the converter valve network side voltage measuring device 412 are connected in parallel between the valve side high-voltage end of the flexible-direct transformer 2 and the main ground network, and are electrically connected with a fixed contact of the converter valve network side isolating switch 413; the converter valve network side current measuring device 414 is connected in series between the converter valve network side isolating switch 413 and the incoming line commutation transition bus 46.
The electrical equipment 4 further comprises a flexible direct current valve arrester 45, and the flexible direct current valve arrester 45 is three-phase; one end of the flexible direct current converter valve arrester 45 is electrically connected with the alternating current side of the upper bridge arm converter valve 421, and the other end of the flexible direct current converter valve arrester is electrically connected with the direct current side of the upper bridge arm converter valve 421.
The upper bridge arm converter valve dc side device 431 includes an upper bridge arm dc side current measuring device 4311 and an upper bridge arm dc side grounding switch 4312, and the lower bridge arm converter valve dc side device 432 includes a lower bridge arm dc side current measuring device 4321 and a lower bridge arm dc side grounding switch 4322.
One end of the upper bridge arm direct-current wall bushing 441 is inserted into the valve hall 1 and is electrically connected with the direct-current side equipment 431 of the upper bridge arm converter valve, and the other end of the upper bridge arm direct-current wall bushing is electrically connected with the upper bridge arm reactor 51; one end of the lower bridge arm direct-current wall bushing 442 is inserted into the valve hall 1 and is electrically connected with the direct-current side equipment 432 of the lower bridge arm converter valve, and the other end of the lower bridge arm direct-current wall bushing is electrically connected with the lower bridge arm reactor 52.
Each phase of the upper arm reactor 51 is electrically connected to a corresponding lower arm reactor 52.
The three-phase flexible-direct transformer 2 is connected in a star shape through a neutral point bus 21 of the flexible-direct transformer;
the converter valve network side lightning arrester 411 and the converter valve network side voltage measuring device 412 are both arranged in a floor mode, the converter valve network side isolating switch 413 is horizontally telescopic, and the converter valve network side current measuring device 414 is arranged in an inverted suspension mode;
the incoming line phase-change transition bus 46 adopts a suspension bus arrangement form;
the upper bridge arm converter valve 421 and the lower bridge arm converter valve 422 are arranged in parallel, and the bridge arm distance is determined according to the requirement of the charged distance and the installation and maintenance requirements of the valve tower;
the flexible direct-current valve lightning arrester 45 is arranged in a hanging mode, and the three-phase flexible direct-current valve lightning arresters 45 are arranged in parallel;
an upper bridge arm direct current side current measuring device 4311 is connected in series in a loop formed by connecting the flexible direct current valve arrester 45 with the upper bridge arm converter valve 421;
the upper bridge arm direct current side current measuring device 4311 is in an inverted suspension type arrangement, the lower bridge arm direct current side current measuring device 4321 is in a ground and forward suspension type arrangement, and the upper bridge arm direct current side grounding switch 4312 and the lower bridge arm direct current side grounding switch 4322 are in a vertical telescopic type vertical ground type arrangement;
the upper bridge arm direct-current wall bushing 441 and the lower bridge arm direct-current wall bushing 442 are arranged in parallel; the upper arm reactor 51 and the lower arm reactor 52 are arranged in a triangular shape.
In actual use, the direct current sides of the upper bridge arm reactors 51 of each phase are electrically connected to output direct current high voltage; the direct current sides of the lower arm reactors 52 of the phases are electrically connected to output direct current low voltage;
the electrical connection comprises a tubular bus, a flexible conductor and a connecting hardware fitting, and the potentials of all electrical connection positions are the same.
The effect of bridge arm reactor position on valve hall and space magnetic field is compared as shown in the following table:
other parts not described belong to the prior art.
Claims (10)
1. The extra-high voltage flexible direct current conversion unit arrangement structure of the bridge arm reactor on the direct current side is characterized in that: the system comprises a valve hall (1), a flexible-direct transformer (2) positioned outside the valve hall (1), a starting loop (3) positioned outside the valve hall (1) and electrically connected with the flexible-direct transformer (2), electrical equipment (4) positioned in the valve hall (1) and electrically connected with the flexible-direct transformer (2), and an arm reactor (5) positioned outside the valve hall (1) and electrically connected with the electrical equipment (4);
the electrical equipment (4) comprises converter valve net side equipment (41), a flexible direct current converter valve (42), converter valve direct current side equipment (43) and a direct current wall bushing (44); the high-pressure end of the valve side of the flexible-direct transformer (2) is inserted into the valve hall (1) and is electrically connected with the converter valve network side equipment (41); the converter valve network side equipment (41) is electrically connected with an alternating current side wiring terminal of the flexible straight converter valve (42); the direct current side wiring terminal of the flexible direct current converter valve (42) is electrically connected with direct current side equipment (43) of the converter valve; one end of the direct-current wall bushing (44) is inserted into the valve hall (1) and is electrically connected with direct-current side equipment (43) of the converter valve, and the other end of the direct-current wall bushing is electrically connected with the bridge arm reactor (5).
2. The arrangement structure of an extra-high voltage flexible direct current conversion unit of a bridge arm reactor on a direct current side according to claim 1 is characterized in that: the flexible direct-current transformer (2) is three-phase, and each phase of flexible direct-current transformer (2) is electrically connected with the corresponding starting circuit (3).
3. The arrangement structure of the extra-high voltage flexible direct current conversion unit of the bridge arm reactor on the direct current side according to claim 2 is characterized in that: the converter valve network side equipment (41) is three-phase;
the flexible straight converter valve (42) comprises an upper bridge arm converter valve (421) and a lower bridge arm converter valve (422), the upper bridge arm converter valve (421) and the lower bridge arm converter valve (422) are both three-phase, the three-phase upper bridge arm converter valves (421) are sequentially arranged, and the three-phase lower bridge arm converter valves (422) are sequentially arranged;
the converter valve direct current side equipment (43) comprises upper bridge arm converter valve direct current side equipment (431) and lower bridge arm converter valve direct current side equipment (432), wherein the upper bridge arm converter valve direct current side equipment (431) and the lower bridge arm converter valve direct current side equipment (432) are three-phase, the three-phase upper bridge arm converter valve direct current side equipment (431) are sequentially arranged, and the three-phase lower bridge arm converter valve direct current side equipment (432) are sequentially arranged;
the direct-current wall bushing (44) comprises an upper bridge arm direct-current wall bushing (441) and a lower bridge arm direct-current wall bushing (442), the upper bridge arm direct-current wall bushing (441) and the lower bridge arm direct-current wall bushing (442) are three-phase, the three-phase upper bridge arm direct-current wall bushings (441) are sequentially arranged, and the three-phase lower bridge arm direct-current wall bushings (442) are sequentially arranged;
the bridge arm reactors (5) comprise upper bridge arm reactors (51) and lower bridge arm reactors (52), the upper bridge arm reactors (51) and the lower bridge arm reactors (52) are three-phase, the three-phase upper bridge arm reactors (51) are sequentially arranged, and the three-phase lower bridge arm reactors (52) are sequentially arranged.
4. The arrangement structure of the extra-high voltage flexible direct current conversion unit of the bridge arm reactor on the direct current side according to claim 3, is characterized in that: the electrical equipment (4) further comprises an incoming line phase change transition bus (46), wherein the incoming line phase change transition bus (46) is three-phase; and each phase of converter valve network side equipment (41) is electrically connected with an alternating current side wiring terminal of the flexible straight converter valve (42) through a corresponding incoming line phase change transition bus (46).
5. The arrangement structure of the extra-high voltage flexible direct current conversion unit of the bridge arm reactor on the direct current side according to claim 4 is characterized in that: the converter valve network side equipment (41) comprises a converter valve network side lightning arrester (411), a converter valve network side voltage measuring device (412), a converter valve network side isolating switch (413) and a converter valve network side current measuring device (414); the converter valve network side lightning arrester (411) and the converter valve network side voltage measuring device (412) are connected in parallel between a valve side high-voltage end of the flexible-direct transformer (2) and a main ground network and are electrically connected with a fixed contact of a converter valve network side isolating switch (413); the converter valve network side current measuring device (414) is connected in series between the converter valve network side isolating switch (413) and the incoming line phase change transition bus (46).
6. The arrangement structure of the extra-high voltage flexible direct current conversion unit of the bridge arm reactor on the direct current side according to claim 5 is characterized in that: the electrical equipment (4) further comprises a flexible direct current valve lightning arrester (45), and the flexible direct current valve lightning arrester (45) is three-phase; one end of the flexible direct current converter valve arrester (45) is electrically connected with the alternating current side of the upper bridge arm converter valve (421), and the other end of the flexible direct current converter valve arrester is electrically connected with the direct current side of the upper bridge arm converter valve (421).
7. The arrangement structure of the extra-high voltage flexible direct current conversion unit of the bridge arm reactor on the direct current side according to claim 6 is characterized in that: the upper bridge arm converter valve direct current side equipment (431) comprises an upper bridge arm direct current side current measuring device (4311) and an upper bridge arm direct current side grounding switch (4312), and the lower bridge arm converter valve direct current side equipment (432) comprises a lower bridge arm direct current side current measuring device (4321) and a lower bridge arm direct current side grounding switch (4322).
8. The arrangement structure of the extra-high voltage flexible direct current conversion unit of the bridge arm reactor on the direct current side according to claim 7 is characterized in that: one end of the upper bridge arm direct-current wall bushing (441) is inserted into the valve hall (1) and is electrically connected with the direct-current side equipment (431) of the upper bridge arm converter valve, and the other end of the upper bridge arm direct-current wall bushing is electrically connected with the upper bridge arm reactor (51); one end of the lower bridge arm direct-current wall bushing (442) is inserted into the valve hall (1) and is electrically connected with the direct-current side equipment (432) of the lower bridge arm converter valve, and the other end of the lower bridge arm direct-current wall bushing is electrically connected with the lower bridge arm reactor (52).
9. The arrangement structure of the extra-high voltage flexible direct current conversion unit of the bridge arm reactor on the direct current side according to claim 8 is characterized in that: and each phase of the upper bridge arm reactor (51) is electrically connected with the corresponding lower bridge arm reactor (52).
10. The arrangement structure of the extra-high voltage flexible direct current conversion unit of the bridge arm reactor on the direct current side according to claim 9 is characterized in that: the three-phase flexible-direct transformer (2) is connected in a star shape through a neutral point bus (21) of the flexible-direct transformer;
the converter valve network side lightning arrester (411) and the converter valve network side voltage measuring device (412) are arranged in a floor mode, the converter valve network side isolating switch (413) is horizontally telescopic, and the converter valve network side current measuring device (414) is arranged in an inverted suspension mode;
the incoming line phase-change transition bus (46) adopts a suspension pipe bus arrangement form;
the upper bridge arm converter valve (421) and the lower bridge arm converter valve (422) are arranged in parallel;
the flexible direct current valve lightning arrester (45) is arranged in a hanging mode, and the three-phase flexible direct current valve lightning arresters (45) are arranged in parallel;
an upper bridge arm direct current side current measuring device (4311) is connected in series in a loop of the flexible direct current valve arrester (45) connected with the upper bridge arm converter valve (421); the upper bridge arm direct current side current measuring device (4311) is arranged in an inverted suspension mode, the lower bridge arm direct current side current measuring device (4321) is arranged in a grounding mode and a forward suspension mode, and the upper bridge arm direct current side grounding switch (4312) and the lower bridge arm direct current side grounding switch (4322) are arranged in a vertical telescopic vertical grounding mode;
the upper bridge arm direct-current wall bushing (441) and the lower bridge arm direct-current wall bushing (442) are arranged in parallel;
the upper bridge arm reactor (51) and the lower bridge arm reactor (52) are arranged in a triangular mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011092270.1A CN112217403B (en) | 2020-10-13 | 2020-10-13 | Extra-high voltage flexible direct current conversion unit arrangement structure with bridge arm reactor on direct current side |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011092270.1A CN112217403B (en) | 2020-10-13 | 2020-10-13 | Extra-high voltage flexible direct current conversion unit arrangement structure with bridge arm reactor on direct current side |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112217403A true CN112217403A (en) | 2021-01-12 |
| CN112217403B CN112217403B (en) | 2022-06-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011092270.1A Active CN112217403B (en) | 2020-10-13 | 2020-10-13 | Extra-high voltage flexible direct current conversion unit arrangement structure with bridge arm reactor on direct current side |
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| CN112803471A (en) * | 2021-02-25 | 2021-05-14 | 中国电力工程顾问集团中南电力设计院有限公司 | Offshore flexible direct current converter station direct current field arrangement structure and size calculation method thereof |
| EP4096048A1 (en) * | 2021-05-26 | 2022-11-30 | General Electric Technology GmbH | Assembly |
| CN116111629A (en) * | 2023-01-31 | 2023-05-12 | 中国华能集团清洁能源技术研究院有限公司 | Offshore flexible straight bridge arm valve tower and alternating current bus same-hall arrangement structure and method |
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| CN112803471A (en) * | 2021-02-25 | 2021-05-14 | 中国电力工程顾问集团中南电力设计院有限公司 | Offshore flexible direct current converter station direct current field arrangement structure and size calculation method thereof |
| CN112803471B (en) * | 2021-02-25 | 2022-05-31 | 中国电力工程顾问集团中南电力设计院有限公司 | Offshore flexible direct current converter station direct current field arrangement structure and size calculation method thereof |
| EP4096048A1 (en) * | 2021-05-26 | 2022-11-30 | General Electric Technology GmbH | Assembly |
| WO2022248265A1 (en) * | 2021-05-26 | 2022-12-01 | General Electric Technology Gmbh | Assembly |
| CN116111629A (en) * | 2023-01-31 | 2023-05-12 | 中国华能集团清洁能源技术研究院有限公司 | Offshore flexible straight bridge arm valve tower and alternating current bus same-hall arrangement structure and method |
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| CN112217403B (en) | 2022-06-03 |
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