USRE16099E - Appaeat o s s ob adbing- to the output os a main power station the output - Google Patents

Description

June 16, 1925. R 16,099

5. D. SPRONG APPARATUS FOR ADDING To THE OUTPUT OF A MAIUPOWER STATION, THE OUTPUT OF ONE OR MORE DISTANT SOURCES Original Filed April 12, 1918 INVENTOR Je Q/W0. jpro/y AT TQRNEY WITNESSES:

Reissued June 16, 1925.

' UNITED STATES PATENT OFFICE.

; 7 SEVEN D. SPRONG, OF BROOKLYN, YORK, ASSIGNOB T WESTINGHOUSE ELEG- TRIC & MANUFACTURING GOMPANY, A CORPORATION OF PENNSYLVANIA.

APPARATUS FOR ADDING TO THE OUTPUT OF A MAIN POWER STATION THE OUTPUT 933' ONE OR MORE DISTANT SOURCES.

- Original N0. 1,3fi9,276, dated January 27, 1920, Serial No. 228,078, filed April 12, 1918. Application for reissue filed September 14, 1921.

- Output of One or More Distant Sources, of

which the following is n specification.

It frecuentlyhappens that while in a certain territory there may be several separated sources of. water power, a combinntion of all or: them, or even of some number less than all, is impracticable hecause the expense is found not justified by the gain in power. Hence some one source of power is usually selected, and the single generating plant, is located in its immediate proximityf- Such a; condition "arise, for example, on a river or stream where there is a success falls; some one falls, where the g head is available, being chosen.

It is, however, generally recogn ed that if auxiliary generating plants of relatively low cost hoth of installation 51nd operation could be E'Stfll'ilislled at one or more of the secondary power sites, the general gain will justify the enterprise, and especially if the auxiliary installation can be controllei'l directly from the main-power station.

This is the, problem which now solved by my present invention.

In the accompanying drawing;

Figure l is illustrative diagrzun,shmv- F ing the loc ,ion of the main and the distant auxiliary stations.

Fig. 2 an electrical. diagram, showing the ap ia-rntus and circuits of the system.

For purpose of illustration, I will assume that the main station A. is, located at the high falls l3 of"v river and there receives power, and t the auxiliary station C is E! located at anc receiv power ruin the low falls D,- distunt 'ills B.

Atthe station 1 chronous generator 1, actuated by a waterwheel, indicated at Generator It delivers to the bus 3, to whici. is connected, the main transmission line 4 and the auxiliary line 5 comniunicating with station C.

At station C is a watenwheel, indicated is n three-phase syn- Serial No. 500,670.

at 6, which is driven by thewater coming through pipe/T, in which pipe is a rotary gate-valve 8. ater-Wheel 6 drives a threephase induction generator 9, here of the squirrel cage t e. g

In the auxiliary line 5 is connected a manually controllable three-phase autotransformer-10, an oil switch 11, and current transformers 12, said current transformers being connected to the coils of a relay The trip coil ll of the .oil switch is connected to a source of direct current supply and to the liked terminals of relay 13.

The gate-valve 8 at station C is controlled by an electric motor 15 connected to line 5 On the shaft of said motor is a bevel pinion engaging gear 16 on the stem of valve'& Also on said motorslieft is a stepped cone pulley 17, on which is wound the cord 18 which, after passing over fixed pulley 19, carries a counter-weight :20.

The operation is follows:

The operator at the main stationA sets the autotransformer at minimum voltage, as shown in Fig. 2. He also manually closes oil switch 11.

plied to it, begins to rotate as a motor. The

motor at station C receiving low voltage makes turns until its torque is counterbalanced by weight 20. Valve 8 is thus partially opened, allowing a small amount ofauxiliary generator delivering energy tothe main transmission line 4, and s0 supplementing the output of the generator 1 at the main station A, and thus utilizing thepower of the falls at D. i Should an accident, such as a short The induction generator 9 at station C then having voltage upunit, occur on the line 5 between the stations, the oil switch ll controlled by overload relay 13 immediately opens because of the excess current {lowing into that circuit from the main generating station. No exciting current can then pass to induction generator 9 or motor 15, and the auxiliary station G becomes electrically dead. The counterweight then rotates clertric motor 15 in the reverse direction, which closes valve 8, sorshutting oil the water supply to wheel 6, and the whole apparatus at the auxiliary station C comes to rest without shock or damage.

In case the operator at the main station wishes to obtain from the auxiliary station less than its maximumoutput, he does not bring the connecting line to maxinnun volt- 'here shown as installed at the auxiliary stat-ion C requires no independent excita-- tion, no voltage control, and no speed coir trol', Nor does it have to be synchronized when. connected to the line, not" is it fixed as: to frequency. This is due to the fact that the generator is excited from out of phase use current taken from the live line to which it is connected. Thevoltage and frequency of such, live line determined the voltage and frequency of the induction generator, and it is only necessary in order to have the generator to act as a true igenerator and send out current at roper vo tage and frequency that it be riven slightly above] synchronism, as hereinbefore described. Such excess speed above synchronism what Imay be called a positive slip and corresponds to the negative slip of the same machine when operating as, an induction motor.

From all the forego'ing it will be seen that I not only secure the whole or partial output of the auxiliary station C, but also control the apparatus at said station. from the main station A, thus eliminating any manual control or personal supervision of said npparatusby attendants at the auxiliary installations.

I have herein shown in Fig. 1 a second auxiliary station E, connected by transmission line 21. Any number of such stations, distant from main station A and from one another, may be independently connected by their own transmission lines to bus 3, so

that all of said auxiliary stations, if do sired, or a selected number of them, may be caused to contribute their output to that of the main station. I

it is also observed that the transmission of power and ot' control between the main power station and the auxiliary power station is accomplished over a single auxiliary-41ers polypliase transmission line;-

and that if a plurality ofauxiliary stations,

distant from the main station and from one i another, be present, then the transmission of power and of control takes place between the main power station and all or any norm her of the auxiliary stations through the single lines eonnectingsaid main station with said auxiliary stations. I

I claim as my invention:

1. A main generating plant, an auxiliary generating plant distant from said main plant, a single transmission line connecting said plants. means connected in. and operat-.- mg through said transmiss on line for cansmg said auxiliary plant to add ts output through said transmission line to the output of said main plant and means at said main plant for controlling said operating means.

3. method of'controllinfrom a.

"main generating plant. a given power station, an auxiliary generating plant at a distant power station electrically connected to said. main station. and of causing said auxiliary plant to its output to the output of said main station. which consists in first actuating the s station as a motor o low roltage transmitted from said main station While independently driving; said generator by prover at said distant station then increasing said voltage and. sa ddrwing power until said distant station generator operates as a true generator and, delivers energy to said main station.

t. A synchronous main transmission auxiliary transmission .1. said mainline, a. polyphassinduction generator, 0; j ieu thereby, an

ner-

iplant, a, plurality the output oi s'aid' 1 said transnussion lines and means at said main generating enerator at said dist-ant.

e iii-branch fmm ator connected tosaiti :uixiliary transmission line, and at a distant power station, means actuated hythe power at said station for driving said induction generator, an electric motor connected in branch to said auxiliary transmission line, and means controlled by said electric motor for regulating" the power actuating said driving means.

5. A synchronous polyphase generator, a

main transmission line supplied thereby, an

auxiliary transmission line in branch from said main line, means for regulating the voltage on said auxiliary transmission line, and at a distant power station, a polyphase induction generator connected to said auxiliary transmission line, means actuated by the power at said station for driving said induction generator, an electric motor connected in branch to said auxiliary transmission line, and means controlled by said electric motor for regulating the power actu ating said driving means.

6. 'A synchronous polyphase generator, a main transmission line supplied thereby, an auxiliary transmission line in branch from said main line, means for regulating the voltage on said auxiliary transmission line,

a manually operable switch in said auxiliary transmission line, and means automatically operating to open said switch upon the occurrence of an acoidentsuch as a short cir cuit-on the auxiliary transmission line, and at a distant power station, a polyphase induction generator connected to said agxiliary transmission line, means actuated by the power at said station for driving said induction enerator, an electric motor oonnected'in ranch to said auxiliary transmission line, and means controlled by said electric motor for regulating the power actuating said driving means. I

7. A synchronous polyphase generator, a main transmission line supplied thereby, an auxiliary transmission line in branch from said main line, means for regulating the voltage on said auxiliary line, and at a distant power station, a polyphase induction generatrn' connected to said auxiliary transmission line, means actuated by the power at said station for driving said induction generator, an electric motor connected in branch to said auxiliary transmission line, means controlled by said motor for regulating the power actuating said driving means, and means .for progressively counter-balancing the torque of said motor. a

8. A synchronous polyphase generator, a main transmission line supplied thereby, an auxiliary transmission line in branch'from said main. line, means for regulating the voltage on said auxiliary line, and at a distant station, a polyphase induction generator connected to said auxiliary transmission line, a hydraulic motor driving said generator, a duct delivering actuating fluid'to said motor, a valve in said duct, an dlcctric motor connected in branch to said .auxiliar transmission line and controlling said va ve to reguthe auxiliary transn'iission line, ma

ulle on said motor shaft controlling the flow oi the n u late the fluid supply to said hydraulic motor, and means for progressively countentalancing the torque of said motor.

9. The combination of claim 8, includr; as the means for regulating the vclta l nualljjf controllable arim-transformer in saio 10. A synchronous polyphase gen main transmission line supplied their auxiliary transmission line in llfillCl said main line, means r regulating the voltage on said auxiliary line, and a. distant station, a polyphase induction gen.- eratorconnected to said auxiliary transmission line, a hydraulic motor iriving a generator, a duct delrvern'zg tuating fluid to said motor, a rotary valve in duct, an electric motor connected in branch auxiliary transmission line and I ring its shaft geared to said Valle, a ste cone pulley, and a counter-w by said cord,

11. A main generatii p generating plant distant fr plant, a trai'isniission line connecting :5: plants, means connc in and erating through said transmission 1" causing said auxiliary plant to add its, output through said transmission line to the output of said main plant, and a manually operable device at said main generating plant for controlling said. operatir' means,

11 an alternating source of fluid energy driving means, energy-etc actuated means, and in us for trolling the energy-storage mean through the main power conductors of the aiterusting-current system.

13. The combination u l current system and a sour for, of an. auxiliary generator, iiuh means for driving the rater, a a1 controllingthe rate of fluid sup fluidactuated driving means, means enei gized from the iain system for con .ollino the position of the valve, and means for in'lpressing upon the system a l. electromoan alternating tive force for operating valve-ecmtroh ling means.

14. The coinoin: ion with an. alternating current system. and a source of energy therefor, of an auxiliary ilui iba'ctuated means for driving the generator, a waive for controlling the ,amount of fluid to the fluidaetuated driving means, reversible means for controlling the position of the valve,

and means, operating through main power'conductors of-said system, for controll ng said reversible means,

l V L C6119 erating through the main power conductorsof said system for controlling the motor.

16. Iii-u power distributing system, the

combination with a main source ofenergy,

ol? an uuxiliairy generator, at Water-Wheel therefor, e gzite-ralve'for controlling the flow of water to the watenwheel, a motor for the valve, means whereby the valve may be controlled in accordance with the energization of the motor, and means for energizing the motor through the main power conductor of the distributing system.

1?. in iflpower distributing system, the' combination with a main source of energy, of an auxiliary generator, 9, water-wheel therefor, 21 gate-valve for controlling the flow of water to the water wheel, a motor for controlling the position of thegate valve, means controlled in accordance "with the direction of rotation of the motor for controlling the operation of-theyal've, and. means, operative through the 2113.111 power conductors of the distributing system, for controlling the operation of the motorfi 18. In. a power distributing system, the combination with a no'ein source of energy, of on auxiliar genera-tor, a. water-wheel therefor, u gate-valve for controlling the How of Water to the n'ater-wlieel, u polyphusc motor energized from the distribution system "for controlling the position of the gate-valve, means for controlling the direction of rotation of the motor. and means operutive'through the main power conductors oi. suitl system for controlling the motor.

ii In a power distributing system, the combination with a main source of energ of on misilinry generator, u watcr-wheel therefor, 2 gate-relive] for controlling the flow oi water to the hater-wheel, u p0ly phase motor energizer from the distribution system for contrr-illingthc position of the unto-valve, moons j'for closing the gatevulrc when energy 'no longer to be supplied to the rlistrilmti ,n system by the auxiliary generator, mid unions operatiyo through the main power conductors of suul system for controlling the operation of the motor to control the operation o't'suill valveclosingmruns.

2!). In a power distr buting system, the combination wilh u llliilll sourciof energy,

of an auxiliary generator, a 'water-wheel therefor, means associated with the waterwheel comprising an energy -storagereservoir, a gate-,valve for controlling the flow of water to the water-wheel a motor for controlling the position 'offtli'e gate-valve,

"means, operative through the main power conductors of suic'l-s'ystein, for controlling v the motor, and means -"respon'sive to the conditlon of the energy-stora'gereservoir for closing the "gate-valve when energy 'is no longer to be supplied to the dishfibution system by the auxiliary generation 21. In a power distributingsystemygth combination with a, main source of energy, of an auxiliary generator, at watewwheel therefor vancla source ofl'wate'r 'power for actuating said wheel,;ii "gate-velve.'-for controlling tho'supply -:of I water to said, wheel, a". motor energized 1' from the 1 distribution system for controlling, the operation of the 'gate valve', and means for causing the motor to' rotate in o direction opposite to that in which its energizatiou fromthe 'distribution system istending to causeit'to rotate.

. 22. In. a ,power distributing system, the combination with a main synchronous 'generator supplying energy to the system and an auxiliary generator .actuuted'by wateractuated-means, oi means-for regulating the supplyof water to said {water-actuated ,nueans, a, motor energized from the system 'for controlling said regulating means, and

means, operating through the main power conductors of the system, to control the -motor.

'23. In a power distributing system, the combination with a main synchronous generator supplying energy to the system and an auxiliary generator actuated by wateroctuated means, of means whereby the mixiliury generator ugly be simultaneouslyen ergized from the distributing system and operated as a generator by the w atnr-actu utcd means, and regulating means whereby the auxiliary generator is controlled to assume :1 portion of the load on the system.

24. In combination, a main generating station, un'auxiliury generating station, a transmission line adapted to be energized from both stations and means disposed at the main station for controlling the uuxil-- iary stution to supply energy to the transmission line only while thetrunsmissiou line is energized.

The method of connecting an alternoting-current generator driven by :i fluidopcrutcd prime mover to an energized power circuit, which comprises applying an clcc tricul potential from the energized power circuit to the generator to start the generator from rest uml simultaneously causing the [lui(l-o n-rutc l prime mover to ho suplllitll with operating fluid, and then simultaneously increasing the electrical potential applied to the generator and the amount of fluid supplied to the prime mover.

26. The method of connecting a generator to a transmission line which comprises starting the generator from rest and accelerating it to substantially synchronous speed by imparting to the generator both mechanical energy through a prime mover for the genorator and electrical energy of approximate- 1y normal frequency from the line.

27. The method of connecting an alternating-current generator driven by a fluidoperated prime mover to an, energized power circuit, which comprises simultaneously increasing the electrical potential applied to the generator from the energized power circuit and the, amount otfluid supplied to the fluid-operated prime'mover, from zero to substantially the normal operating values.

28. In a power system, the combination with a main generating station, a second generating station and a transmission line therebetween, of means associated with the second generating station for controlling the supply of energy by the second station to the system and step-by-step means operative through said transmission line for controlling the energy-controlling means.

29. In an electrical'system of distribution, the combination with a main generat ing station, a plurality of auxiliary generating stations providedwith energy-translating apparatus, and a common powertransmission circuit to which the respective stations are to supply energy, of means for connecting the apparatus of the respective stations to the power-transmission circuit, means for impressing upon a portion of the transmission circuit an electromot-ire force having characteristics difi'ering from the characteristics of the normal operating potential of the power circuit and means associated with the respective translating apparatus and responsive to the impressed electromotive force for selectively controlling the translation of energy fromthe associated apparatus to the power circuit.

In testimony whereof, 1 have hereunto subscribed my name this 7th day of September, 1-921.

SEVERN D. SPRONG.

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