DE1401441A1 - Hydraulic control device for steam turbines with bypass, which get their working steam from reactors - Google Patents

Description

Liccntia Patont-Verwaltungs-Giubilo · ■ »** · 7

FrankfurtA1aii3 »Theodor- =

»Oldi / Chr Bo ~ 3O 936

"Hydraulic control device for steam turbines with Bypass, which get their work sdainpf from reactors "

The invention relates to a hydraulic RogclungsyorricIituiBg for steam turbines with bypass ₉ oils their work sdaispf from reactors _s preferably boiling water reactors _δ beziohexio

The invention aims ₉ Unstable occurring in BelaetungsanderimgOn the turbine it ät en dan in control loops for äi® turbine and for di © bypass control "di © undesirable in reactor operation fluctuations of the vapor pressure cause _{Ιεοηηβρ} ΰ largely to suppress"

The invention consists in 'that both OEEA * loop for the turbine control and the control circuit for the Bypassa * © geiö »g is connected to a hydraulic piston system ₈ Sas ISS function of the pressure of the of next from the reactor Arbeitstlasapfes the turbine inlet" and the BjimaBVCiiill proportional Daapf quantity controlled without delay

The advantage of the invention is "that the two control loops of the turbine are influenced by the speed of the turbine and the damper of the reactor at the same time." This results in a favorable

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gares 2 © Iitrer! fca.?. iae der gesaiatea Rogeluiug-., Ks there is a serious leveling out of pressure and rotary siaftlänöorungcn ös »roieS3t _ö e? .i © ■ 'The stability of the control is improved with a lower tendency su pendulum phenomena ο.

The Regöiungsvorrichtung is vortoilhafterweise formed so that hydraulic Kolbensysteia that- ira essentially of ® ± n m reciprocating piston and a lifting rod, the controller door öen Arboitsdampf and on the other hand via sin member having dea Kubitolben on the one hand firmly Rait Clem 'pressure if3t _{8 o} ä © _£ a regulator facing side ö © s Kolfe system is a egg.osr X pressure line -sum power downstream for the TurbiRöKsinlaßveiofcil s? © fbimden ₉ while on the opposite side ä & s Sy-atom® ü-or reciprocating piston from eiiaem from the rotary regulator of the TurMsi®. -.f / s ^ ssäs? .. ¹ ! Iiapjslsdruck feeaoJfschlagt isto FcrneH 'is from the letKir, -rBorate *' side of the system. Xrapulsdruck snr Steuerölig des Byijp.ssvösE · = tiis derived via a power switch & r

The hydraulic © piston system is with a start = miu hiit © iru; Bypasa-Steueruwg equipped the control of the ϊκΐΦΙοΘΜβΙκ laß «and the Bypaasveaitils independently of each other and rasmfeifiasiglg; from that in the Regelungsvorrichtimg eiiügestcllten Bofcrieföselriaek 'of the working steam übsrneSiiBörio Vort © iihaft © ra ^r else v / IRFL cl @ f In "pulse pressure sura power switch for the ßypassirentii atigleieh door as a control variable di © Reactor Control

In Figures 1 and 2 of the drawing rule schemata "" / OK dergögebeßg while on! Land of Figure 3, slide it ?. construction äoic R golungsvorrichtiiHg soigt that IV ^r irkuKgs% ree @ äor Yor purifies wirdo

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Figo 1 inclines - the basic ^{scheme of the 1} control in a circuit diagram "The steam bends are in the circuit diagram G ₈ the .speed lait η and -the pressure ial & ρ denotes" Corresponding indices indicate the ©! "His control circuit © "In Figo 2 the control device according to Figo 3 is shown in a block diagram =" picture _{o The} DaospfBtenge Gp of the reactor also influences the pressure p _B , taking into account the steam flow to the bypass and to the turbine! Ifb «coil of the pressure} ρ ~ is on the hydraulic piston system« g © ~ leads _e from the corresponding over & m stroke higher hoof bar "and the relative stroke. In the reciprocating piston Si © pulse pressure © pig on the power switch rait desa stroke ΪΙ _β for flon bypass ιιικΐ pi «on the power switch with desa stroke H ^, for the turbine can be derived _β From the equilibrium between the turbineiüGaomcnt IL ·, and üem νου. The Güneratorkraft W« resulting droiisioeent B ^ _s the ₅ m it the Sollärehsahl kjq compared _ΰ a * further impulse pressure pi., on the power switch H, "the turbine sjibt * In addition, the abgenonaaen © Iispyla pi from the speed controller still influences the hydraulic piston © nsy8teni _e whereby the relativlsi? .fo ά® 8 Mubkolbens öhe is sucked _for the turn don-Irapui-sdruck -.- pi.? fits di © Bypass control influences · With this circuit we achieve «that the pulse pressure of the speed controller eiij voia Bractc · = controller directly controlled pulse pressure is so overlaid,

that the turbine valve is also influenced by the pressure regulator, for example in the event of a drop (Iqa vapor pressure of the reactor _t receive a closing pulse

BATH

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When the control is switched "d" h "when Icein momentum before printing available _s 1st eind all steam valves closed. When the control is switched on, all steam valves are closed as long as

until the operating pressure range of the system is reached · When the pressure regulator responds, the turbine valve begins to open. The bypass valve does not open until the turbine has reached operating speed.By additional hand-operated impulse controls for the start-up and bypass control, the turbine inlet and bypass valves can be operated _{independently of one another below the operating pressure and 9} as far as the turbine load permits Any position can be moved · This results in various starting options, which are _{particularly advantageous for the operation of the turbine old bypass 5} in connection with a realetor as a steam generator · The individual control options are described on the basis of FIG

Assuming that the start-up and bypass controls are closed, the turbine valve 13 is initially closed control by the speed controller 22 Adapted · increases the vapor pressure übtr the allowable operating pressure, the pressure regulator 16 opens the bypass valve 14. to Fail ₉ that the starting control 25 and the bypass control 26 to 1st, drives the turbine with an open turbine valve 13 with low vapor pressure and · the start-up assistance can the old bypass control are regulated _o When lirreichen the BetriebsdrehBahl the speed controller 22 takes, and the turbine 23 runs below the ßetriebedruekts "steigi · *

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if the vapor pressure is above the permissible operating pressure, then dex » Pressure regulator 16 the bypass valve accordingly. If the start-up control is su 1st and the bypass control is on, then the Daepf Via the open bypass valve 14 into the condenser 30 of the System »in front of which a flood cooler 29 is switched, ge» drive · The turbine valve 13 is closed in this case. If the vapor pressure now exceeds the threshold of the pressure regulator 16, the turbine valve receives an opening pulse. Should ever » However, if the turbine 23 is not started up, the quick-release device connected in parallel with the turbine valve 13 is activated 31, 28, 27 actuated, and the turbine valve 13 remains closed · Even in the event that both the start-up rotation and the bypass control is open, the steam is fed into the condenser via the open bypass valve but the turbine valve is open and the turbine starts up wit low pressure · When the operating speed is reached, it takes over now the speed controller, and the turbine runs with low steam pressure and low power Bypaafevcntil to close accordinglyό

The start-up examples just described show that with the The control device according to the invention also provides a security system for the operation of the turbine system. Once it is switched on, the control is in the Intervention and responds in any case, even with any set start-up or bypass control, in such a way that the permissible values for steam pressure and turbine throttle not exceeded

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In Lüstabiviirf the turbine valve 13 closes as a result of rotation = ^y zahlsteigerungo The Schließinipuls of the speed controller is transmitted as Öffnungsiispuls to the bypass control, and the bypass valve is opened at the same time by as much or "opened further, as the turbine valve as a result of the load shedding ge"closed; must become. Therein lies another major advantage of the circuit _t because by dio direct transfer of Drehzahlreglerlmpislises to bypass regulation is undesirable for reactor operation variation of the vapor pressure weitge = "starting avoided. In accordance with the task of the invention, the 'new equilibrium of the regulation is established in an extremely short time'

In the case of an emergency shutdown, as with Lastabivurf, the closing impulse for the turbine valve and for the upstream closing valve 2? at the same time as the opening impulse transmitted to the bypass control "The bypass valve opens at the same time and in the same range ₉ as the turbine valve is closed because of the quick-closing release"

Zm individual is _δ as geseigi in Figo 3 ", the hydraulic piston system 11 from the reciprocating IS ₉ which is loaded by the detached from the speed controller 22 pulse pressure pi * · On

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This side of the sub-piston is the Kammex ^ 21 _δ in which the pulse pressure pig for the crane switch 24 is generated by the bypass valve 14 »On the other side of the ilis bulb, the chamber 19 is provided _B through which the I & sbstang® 15 is guided is β öie over »o an elastic gliod 1? the raechanischo between the reciprocating piston 18 and dsm pressure regulator 16 for äen vom

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Reactor 12 produces all of the pressure p, j of the thermal steam. From this side the Kolfoensystesas _t from the chamber 19 ^ the pulse pressure pi ₂ for the power switch he 20 of the turbines is derived "inlet valve IS ₀ parallel to the tower inlet valve 13 is the Schno11Schluß alve connected 27 to the power switch 28 ^ by the SchnellscMuß Auelösungsvorrichtung wirdο 31 is actuated all flow cross-sections at the hydraulic devices are connected to a Abiaufpfeil by the reference numeral 0 verse "hen" the ImpulsdruGkräurae of the control device are defined by the built-in the impulse piping inlet aperture 32 _B 33 and 35 against the residual pressure pulse pi _v dimmed ₀ era pressure and speed controller 16 and 22 and augmentation at startup "and Bypase STEU ^» 25 and 26, electric drive motor "M ssur Fornbe = dienung are provided. '-

Pat eiit claims s _m

BATH

80981 3/0 U2

Claims (1)

Licentia Patent-Verwaltuiigs-GiabHo FrankfurtAfain, Boldt / Chr Bo = SO 936 Claims 1 «Hydraulic control device for steam turbine bypass, the. Their Arfoeitsdaatpf from reactors ,, preferably boiling water reactors ,, see * ^ d & eUsreh marked "" that both the control circuit for the turbine control and also the control circuit for the bypass control is connected to a hydraulic Kolbesisyateci (11) 'that depends on the pressure des from the reactor (12) komiaenöeEJ Arbeitedarapfes the turbine inlet = (13) 5snd the I ^ ypass ^ enti! (14) proportional to the amount of steam without delay controls _β β RegeiungsvoFrichtuiig according to claim i _s characterized gokemnz! eicknefe _s that the hydraulic KolbensysieEn (11) in weseiitllcheii of a reciprocating piston (18) and a Hubstasige (15) _s on the one hand fixedly connected to the pressure regulator (16) for ά®η working steam and and © - (? 1) = rerselts connected via an elastic member with the Hubfcolban (18) _e is " S ₀ Regelungsvorrichtußg according to claim 2 ₅ characterized gelconnsjeichnet _t that the pressure regulator (16) facing © side (19) of the piston systems * (11) Rait the Isapuisdraclcleitiing (pig) sum Kraftsöfsalter (20) for the I'urbineneinlailventil (13) is ₈ BATH ORIGINAL 809813 / 0U2 j / - 'Bo = SO 936 while on the opposite side © (21) ties Systeias (1.1) the reciprocating piston (18). is acted upon by a pulse pressure (pi ^) taken from the speed controller (22) via Tur => bina (23) that from the latter side (21) of the piston system a pulse pressure (pig) to control the bypass valve (14) via a power switch (24) derived 1st * 4 · Control device according to claim 1 "characterized _δ that the hydraulic piston system (11) is equipped with an Anfalur (S5) and old standard Bypas3- ° control (26) ₉ di © al® - control of the turbine &inlet" (13) and the bypass valve (14) take independently of each other and independently from that in the Regeiniiga · = device set operating pressure of the working steam * 5 x control apparatus according to claim 3 _{8 8} characterized in that the pulse pressure (pig) "at the same time as a control variable for the fteakiorrege pass valve (14)" used by lung power switch (24) for the By " BATH 809813 / 0U2