CN203119316U - Power electronic substation - Google Patents
Power electronic substation Download PDFInfo
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- CN203119316U CN203119316U CN2013200726245U CN201320072624U CN203119316U CN 203119316 U CN203119316 U CN 203119316U CN 2013200726245 U CN2013200726245 U CN 2013200726245U CN 201320072624 U CN201320072624 U CN 201320072624U CN 203119316 U CN203119316 U CN 203119316U
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- circuit breaker
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Abstract
The utility model relates to a power electronic substation. The power electronic substation comprises a plurality of power supply inlet wires, each of which is connected with a wire-inlet-side bus through a first solid-state circuit breaker respectively; corresponding to each inlet wire, the wire-inlet-side bus is connected in parallel with a voltage transformer; a second solid-state circuit breaker is arranged, between the two inlet wires, on the wire-inlet-side bus; each inlet wire is then connected with a wire-outlet-side bus through a third solid-state circuit breaker, an power electronic transformer and a fourth solid-state circuit breaker sequentially; a fifth solid-state circuit breaker is arranged, between the two inlet wires, on the wire-outlet-side bus; and corresponding to each inlet wire, the wire-outlet-side bus leads out three power supply outlet wires and is connected in parallel with a voltage transformer at the outer side, and a sixth solid-state circuit breaker is arranged on each outlet wire. The power electronic substation is capable of quickly isolating faults, improving the accurate control capacity of a power grid and improving the level of safe and stable operation of the power grid in addition to having conventional functions. Meanwhile, the existing substation structure is changed, the size of main equipment is reduced, the configuration of the main equipment is simplified, and the occupied area is reduced.
Description
Technical field
The utility model relates to a kind of novel transformer station, particularly about a kind of power electronics transformer station.
Background technology
Transformer station be voltage of transformation in the electric power system, acceptance and distribution electric energy, control flow of power to the electric power facility of adjusting voltage, it gets up by the grid contact of transformer with each step voltage.Except transformer; the equipment of transformer station opens and closes the switchgear of circuit in addition, compiles the bus of electric current, metering and control instrument transformer, instrument, protective relaying device; lightning protection device and dispatching communication apparatus etc., transformer station also is furnished with reactive-load compensation equipment and high impedance device etc. usually.
Conventional substation generally comprises primary equipment and secondary device.The primary equipment aspect generally adopts single-phase or three-phase electricity magnetic-type transformer carries out voltage transformation; Adopt electro-machanical formula circuit breaker under the electric power system normal operation, to be used for closing or open circuit, under protective relaying device control, automatically faulty equipment and circuit are disconnected during fault, can also have the automatic reclosing function; When electric power system is broken down, utilize the short circuit current of the inductance characteristic inhibition system of traditional current limiting reactor, to alleviate the burden of cut-offfing of circuit breaker.The secondary device aspect; the differential protection that traditional relay protection typical case one of uses utilizes Kirchhoff's current law (KCL); get protected element two ends CT(current transformer) the current phasor difference as the action foundation; break down or during unusual service condition in system; automatically faulty equipment is excised from system; or send signal and eliminate the unusual service condition root by the operator on duty, to alleviate or to avoid the damage of equipment and to the influence of adjoining area power supply.
At present, the subject matter that conventional substation faces is: along with the continuous lifting of transmission voltage grade and system short circuit capacity, function and insulation property require to make the transforming plant primary equipment volume more huge, the manufacture difficulty increasing, and transformer station's area and expropriation of land investment are huge day by day.Simultaneously, each industrial and mining enterprises not only, comprise that the resident is also more and more higher to the requirement of power supply quality, tradition transformer station ability of regulation and control is limited, drawbacks such as first and second equipment reliable in action and operation stability are not high, accurately control ability is poor in real time, environment protecting is undesirable are day by day obvious, and it is also increasing to solve grid short circuit current problems difficulty with traditional technology.
Power electronic technology is the fusion of electronic technology, control technology, modern computing technology, power technology, can utilize power electronic device that electric energy is controlled and changed.In recent years, significant progress had been arranged along with the develop rapidly of large power semiconductor device.By adopting various power electronic technology can improve the quality of power supply, reduce instantaneous power-off, voltage die/jump and harmonic wave etc.By improving the flexibility in the operation, blocking up of electrical network alleviated in the fail safe that the Electronic Control ability can improve physically or control, and good controllability can reduce the electric energy loss of transmission of electricity level, transformer station's level and distribution level.For solving the short circuit current problem of long-term puzzlement urban distribution network, the flexibility that improves power grid control provides wide application prospect.
In sum; problem demanding prompt solution is: the design of improving conventional substation; be core with the power electronic technology; replace traditional transformer station capital equipment with solid-state power electronic equipment; finish transformer station's major functions such as voltage transformation, electric energy transmission and equipment protection control, can reach the building process that is applicable to intelligent transformer station better.
Summary of the invention
At the problems referred to above, the purpose of this utility model provides the power electronics transformer station that a kind of primary equipment volume is little, investment is little and first and second equipment action ability of regulation and control is good, stability is high.
For achieving the above object, the utility model is taked following technical scheme: a kind of power electronics transformer station, and it is characterized in that: it comprises the inlet wire of some roads power supply, described each road inlet wire connects an inlet wire side bus through one first solid circuit breaker respectively; Corresponding to described each road inlet wire, a difference voltage transformer in parallel on the described inlet wire side bus; Described inlet wire side bus between the described inlet wire is provided with one second solid circuit breaker in twos, described each road inlet wire is connected the outlet side bus through one the 3rd solid circuit breaker, an electric power electric transformer and one the 4th solid circuit breaker more successively, and the described outlet side bus between the described inlet wire is provided with one the 5th solid circuit breaker in twos; Corresponding to described each road inlet wire, described outlet side bus is drawn the three-way power outlet and at the outside of an outlet side bus difference voltage transformer in parallel, all is provided with one the 6th solid circuit breaker in described each road outlet.
The mode of connection of described inlet wire side bus and described outlet side bus is sectionalized single busbar connection.
It also comprises solid-state demand limiter, and on every adjacent six tunnel described power outlet, the described solid-state demand limiter of wherein connecting on the described power outlet is with limiting short-circuit current.
The utility model is owing to take above technical scheme, it has the following advantages: 1, the utility model is owing to adopt power electronic equipments such as solid circuit breaker, electric power electric transformer, solid-state demand limiter, can realize the quick isolation of fault, improve the accurate control ability of electrical network, promote the power network safety operation level; Change transformer station's existing structure form simultaneously, reduce the main equipment volume, simplify the main equipment configuration, significantly reduce floor space, and be with good expansibility.2, the utility model is owing to adopt solid circuit breaker to realize the function of cut-offfing of circuit, and it opens/and the turn-off time only is the microsecond magnitude, therefore has action control flexibly, fireballing characteristics; And open/turn off process do not produce overvoltage and overcurrent, reduces the requirement of insulation level and the dynamic thermal stability of equipment significantly; Interrupting process does not have electric arc simultaneously, and the circuit breaker life-span is long, is particularly suitable for the intelligent substation demand for development, and Application of Solid State Circuit Breaker has also been cancelled the use of isolating switch in addition, so switchgear quantity significantly reduces, has saved the equipment occupation of land.3, the utility model is owing to adopt solid-state electric power electric transformer to realize the transformation of electrical energy function, and it can realize the closed-loop control of output voltage, keeps higher output voltage regulation; Simultaneously electrical network and user isolation are come, can eliminate fluctuation, wave distortion and the frequency fluctuation of voltage on line side, idle, the harmonic wave that can suppress again to be produced by user side, instantaneous short-circuit are to the influence of power supply grid.In addition, it utilizes air to cool off naturally, save oil-filled, thereby reduce to pollute, safeguard simply, fail safe is good, meets the demand for development of transformer station of new generation.
Description of drawings
Fig. 1 is the main wiring diagram of conventional substation
Fig. 2 is the main wiring diagram of the utility model power electronics transformer station
Fig. 3 is the structural representation of full-control type solid circuit breaker
Fig. 4 is the solid-state electric power electric transformer structure chart of PWM control type
Fig. 5 is solid-state demand limiter key wiring diagram
Fig. 6 is the utility model power electronics transformer station Internet of Things control chart
Embodiment
Below in conjunction with drawings and Examples the utility model is described in detail.
In general, electric energy is sent into by the end of incoming cables in transformer station, connects disjunction control, transformer voltage of transformation grade through bus distribution, switchgear (comprising circuit breaker and isolating switch), finally by leading-out terminal electric energy is sent.As shown in Figure 1, the design of conventional substation is around traditional primary equipment, as machinery-electric circuit breaker 21, electromagnetic type transformer 23, inductance type current limiting reactor 24, voltage transformer 22 and reactive-load compensation capacitor 25 etc.And the utility model mainly adopts power electronic equipments such as solid circuit breaker, electric power electric transformer, solid-state demand limiter.
As shown in Figure 2, the utility model comprises some roads electric power incoming line (be example with the two-way), and each road inlet wire 1 connects an inlet wire side bus 3 through a solid circuit breaker 2 respectively; Bus 3 modes of connection are that sectionalized single busbar connection is reliable to guarantee power supply, and are middle by 4 connections of segmentation solid circuit breaker; Corresponding to each road inlet wire 1, a side of bus 3 voltage transformer 5 in parallel is to measure the electric power incoming line magnitude of voltage.Each road inlet wire 1 is connected outlet side bus 9 through a solid circuit breaker 6, an electric power electric transformer 7 and a solid circuit breaker 8 more successively.Bus 9 modes of connection are similarly sectionalized single busbar connection, and are middle by 10 connections of segmentation solid circuit breaker.Corresponding to each road inlet wire 1, outlet side bus 9 is drawn three-way power outlet 11, and a voltage transformer 12 in parallel on the bus 9 of one road power outlet, 11 1 sides therein, all is provided with a solid circuit breaker 13 in each road outlet 11.For each road inlet wire 1, under two PWM changing type electric power electric transformer 7 both sides solid circuit breakers 6,8 combined floodgate situations, incoming power carries out voltage transformation at electric power electric transformer 7 places, be to arrive outlet side bus 9 after the low-voltage by high-voltage variable, by 9 unified distributions of outlet side bus, form three tunnel low-tension supply outlets 11 again.Produce at the short trouble situation, power outlet 11 corresponding to every adjacent six tunnel, therein in one tunnel outlet 11 except connecting solid circuit breaker 13, the solid-state demand limiter of also connecting (being called solid-state fault current limiter or solid-state short circuit current limiter again) 14, is in order to limiting short-circuit current.
As shown in Figure 3, the solid circuit breaker primary structure in the utility model is composed in series after by two IGBT31 elder generation reverse parallel connection diodes 32 again, forms an alternating-current switch module, again by rated voltage with its formation IGBT full-control type solid circuit breaker that is together in series.During normal the operation, if some forward IGBT31 conducting in the control circuit, with another IGBT31 diode connected in parallel 32 natural conductings, bearer circuit electric current.As shown in Figure 2, electric energy transfers to next equipment or leading-out terminal via solid circuit breaker; When drop-out current or when breaking down, need the control solid circuit breaker to turn-off, only need control two IGBT31 devices simultaneously and turn-off, the grid voltage that is about to two IGBT31 drives signal zero setting, and then solid-state switch disconnects in 2 microseconds.
As shown in Figure 4, the electric power electric transformer in the utility model is to adopt two PWM changing types, and it is set up in the AC/DC/AC conversion scheme.It comprises voltage-type three-phase PWM rectification circuit 41, single-phase bridge inverter circuit 42, high frequency power transformer 43, single phase bridge type rectifier circu 44, three-phase inverter bridge circuit 45 and pwm control circuit 46.As shown in Figure 2, electric energy is entered by the end of incoming cables, two electric power electric transformers, 7 both sides are connecting two kinds of electric pressure buses 3,9 respectively, 7 places are changed to low-voltage with high-voltage variable at two electric power electric transformers, send the electric energy that the next stage load is suitable at leading-out terminal at last, finish the conversion transmission of electric energy in transformer station.Specifically, the former limit of power frequency high voltage alternating current input electric power electric transformer, become direct current by three-phase voltage type PWM rectification circuit 41, thereby realize the phase control of power network current, be the high frequency single-phase alternating current by single-phase bridge inverter circuit 42 with its inversion then, be coupled to secondary through high frequency power transformer 43 then, again through single-phase high-frequency rectification circuit 44, the high-frequency alternating current of transformer secondary is become direct current, finally by three-phase inverter bridge circuit 45 and pwm control circuit 46, obtain industrial-frequency alternating current output.
As shown in Figure 5, solid-state demand limiter in the utility model mainly comprises the antiparallel GTO51(gate level turn-off thyristor in twos of three pairs of series connection), be connected in parallel on each to the absorption circuit 52 at antiparallel GTO51 two ends, current-limiting impedance 53 and a MOA(metal oxide arrester) 54.Under normal load conditions, the GTO51 switch closure is in complete conducting state.The GTO51 switch is driven by size of current or current-rising-rate, can be converted to off-state in tens microseconds, and can disconnect very big electric current, and fault current is restricted before the damaging numerical value very soon reaching.At the GTO51 shutdown moment, current direction absorbs the electric capacity in the circuit 52, absorbs circuit 52 before GTO51 voltage reaches the MOA54 operation voltage, has limited the rate of climb of voltage.This voltage also is added on the current-limiting impedance 53, because the effect of current-limiting impedance 53, fault current is restricted.When fault is eliminated, it is normal that line current recovers, and the GTO51 switch is zero or conducting when approaching zero at voltage then, can avoid the capacitor discharge electric current that absorbs in the circuit 52 too big like this, and the electric current in the restriction impedance 53 will attenuate in a few tens of milliseconds.
Electric power electric transformer in the utility model records the equation of light as the fault basis for estimation with the optical current mutual inductor of both sides, and the protection actuating signal of this magnetic-light is sensitiveer than the traditional protection actuating signal of traditional magnetic-electricity.This is because the photon computing technique of differential protection does not need to be converted to the signal of telecommunication, but directly carries out plus and minus calculation, scale operation and the phase shift computing of Faraday angle of rotation in the light path aspect.The photon differential protection utilizes the optical current mutual inductor technology, and in order to ensure the reliability of photon differential protection, the whole optical current mutual inductors that require a cover photon differential protection to adopt in the power electronics transformer station have consistent transient measuring quality.In the utility model; the photon differential protection not only will significantly promote the quality of protective device; and with power electronic technology, network technology jointly; to become the support technology that electric power secondary system structure and equipment are simplified significantly; the electrical network vision of power-assisted " primary system of electricity, the electrical secondary system of light " is realized.
As shown in Figure 6, the utility model can also adopt the Internet of Things communication mode to realize remote visualization self adaptation coordination control.The equal embedded IED (intelligent electronic device) with radio transmission-receiving function of auxiliary control appliance in primary equipment in the utility model power electronics transformer station and the peripheral station that is equipped with, wherein: the interior auxiliary control appliance of stand includes but not limited to temperature sensor, lightning protection monitoring device, gate inhibition's equipment, changing sensor, fence, SF6 spy flue gas, water sensor, SF6 leakage alarm, RFID identification equipment and camera.Auxiliary control appliance in primary equipment and the station is because the IED (intelligent electronic device) of embedded radio transmission-receiving function, it has certain intelligent and capacity of will, so they are equivalent to a station server separately, distributed earth is realized function separately, so primary equipment and auxiliary control appliance can be inserted power communication private network 62 and the Internet 63 respectively by some wireless network switch 61, and carry out lateral isolation to ensure information security by fire compartment wall 64 between power communication private network 62 and the Internet 63.At this moment, primary equipment and auxiliary control appliance are by sending into power communication private network 62 and the Internet 63 with separately work and status signal respectively through wireless network switch 61, be uploaded to station control system and the dispatching control center of power electronics transformer station again, wherein, the control system configuration of standing has the high-performance supercomputer, being responsible for station level system control, and with the electrical network interaction, realize that wide area coordinates and control.Therefore the utility model can be realized remote visualization self adaptation coordination control, thereby finishes remote signalling, remote measurement, remote control, remote regulating to equipment in the intelligent substation.
The various embodiments described above only are used for explanation the utility model; wherein the structure of each parts, connected mode etc. all can change to some extent; every equivalents and improvement of carrying out on the basis of technical solutions of the utility model all should do not got rid of outside protection range of the present utility model.
Claims (3)
1. power electronics transformer station, it is characterized in that: it comprises the inlet wire of some roads power supply, described each road inlet wire connects an inlet wire side bus through one first solid circuit breaker respectively; Corresponding to described each road inlet wire, a difference voltage transformer in parallel on the described inlet wire side bus; Described inlet wire side bus between the described inlet wire is provided with one second solid circuit breaker in twos, described each road inlet wire is connected the outlet side bus through one the 3rd solid circuit breaker, an electric power electric transformer and one the 4th solid circuit breaker more successively, and the described outlet side bus between the described inlet wire is provided with one the 5th solid circuit breaker in twos; Corresponding to described each road inlet wire, described outlet side bus is drawn the three-way power outlet and at the outside of an outlet side bus difference voltage transformer in parallel, all is provided with one the 6th solid circuit breaker in described each road outlet.
2. a kind of power electronics as claimed in claim 1 transformer station, it is characterized in that: the mode of connection of described inlet wire side bus and described outlet side bus is sectionalized single busbar connection.
3. a kind of power electronics as claimed in claim 1 or 2 transformer station, it is characterized in that: it also comprises solid-state demand limiter, on every adjacent six tunnel described power outlet, the described solid-state demand limiter of wherein connecting on the described power outlet is with limiting short-circuit current.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310050607.6A CN103138171B (en) | 2013-02-08 | 2013-02-08 | A kind of power electronic transformer substation |
| CN2013200726245U CN203119316U (en) | 2013-02-08 | 2013-02-08 | Power electronic substation |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310050607.6A CN103138171B (en) | 2013-02-08 | 2013-02-08 | A kind of power electronic transformer substation |
| CN2013200726245U CN203119316U (en) | 2013-02-08 | 2013-02-08 | Power electronic substation |
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| Publication Number | Publication Date |
|---|---|
| CN203119316U true CN203119316U (en) | 2013-08-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310050607.6A Active CN103138171B (en) | 2013-02-08 | 2013-02-08 | A kind of power electronic transformer substation |
| CN2013200726245U Expired - Fee Related CN203119316U (en) | 2013-02-08 | 2013-02-08 | Power electronic substation |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310050607.6A Active CN103138171B (en) | 2013-02-08 | 2013-02-08 | A kind of power electronic transformer substation |
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| CN (2) | CN103138171B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103138171A (en) * | 2013-02-08 | 2013-06-05 | 国家电网公司 | Power electronic transformer substation |
| CN111786355A (en) * | 2020-06-23 | 2020-10-16 | 上海电器科学研究所（集团）有限公司 | Protection device and protection method for restraining short circuit of direct current bus support capacitor |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103872702B (en) * | 2014-03-13 | 2016-03-16 | 中国能源建设集团广东省电力设计研究院有限公司 | A kind of intelligent micro-grid distribution network main electrical scheme structure |
| CN103944163B (en) * | 2014-04-25 | 2016-06-08 | 国网上海市电力公司 | A kind of compound transformer substation system |
| CN104143775B (en) * | 2014-08-18 | 2016-04-20 | 国家电网公司 | A kind of power electronic transformer substation |
| CN107017644A (en) * | 2017-06-02 | 2017-08-04 | 合肥同佑电子科技有限公司 | A kind of electronic transformer intelligence control system |
| CN107154630B (en) * | 2017-07-05 | 2021-05-11 | 国家电网公司 | Hybrid power electronic transformer substation |
| CN107294111A (en) * | 2017-07-13 | 2017-10-24 | 合肥利元杰信息科技有限公司 | A kind of electronic transformer intelligence control system |
| CN108023350A (en) * | 2017-12-18 | 2018-05-11 | 安徽伊格瑞德电气设备有限公司 | A kind of segmentation fast switching system and its method of work based on SCR double-bus |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101882780B (en) * | 2010-06-28 | 2013-04-10 | 中国西电电气股份有限公司 | Intelligent control module for energy storage motor of tank circuit breaker |
| CN102457192A (en) * | 2010-10-22 | 2012-05-16 | 白鹭 | Double PWM power electronic transformer |
| CN102593809B (en) * | 2011-01-14 | 2015-06-03 | 同济大学 | Solid-state circuit breaker with over-voltage suppressing function |
| US9537299B2 (en) * | 2012-07-25 | 2017-01-03 | Hamilton Sundstrand Corporation | Power management and distribution with auxiliary DC bus |
| CN103138171B (en) * | 2013-02-08 | 2016-01-20 | 国家电网公司 | A kind of power electronic transformer substation |
-
2013
- 2013-02-08 CN CN201310050607.6A patent/CN103138171B/en active Active
- 2013-02-08 CN CN2013200726245U patent/CN203119316U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103138171A (en) * | 2013-02-08 | 2013-06-05 | 国家电网公司 | Power electronic transformer substation |
| CN103138171B (en) * | 2013-02-08 | 2016-01-20 | 国家电网公司 | A kind of power electronic transformer substation |
| CN111786355A (en) * | 2020-06-23 | 2020-10-16 | 上海电器科学研究所（集团）有限公司 | Protection device and protection method for restraining short circuit of direct current bus support capacitor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103138171B (en) | 2016-01-20 |
| CN103138171A (en) | 2013-06-05 |
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