CN204302026U - Transient Process of Hydropower Station integrated physical model test platform - Google Patents
Transient Process of Hydropower Station integrated physical model test platform Download PDFInfo
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- CN204302026U CN204302026U CN201420872352.1U CN201420872352U CN204302026U CN 204302026 U CN204302026 U CN 204302026U CN 201420872352 U CN201420872352 U CN 201420872352U CN 204302026 U CN204302026 U CN 204302026U
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Abstract
A kind of Transient Process of Hydropower Station integrated physical model test platform; comprise circulation (1), the excitation protection system same period (2), speed-adjusting and control system (3), frequency conversion commutation system (4), monitoring system (5), load system (6), measurement system (7), prototype group system (8) and model channel system (9), the experimental study of the transient process such as great fluctuation process, minor swing and hydraulic loading cycle and other relevant issues can be carried out on the platform.Its advantage is: the utility model integrated level is high, stable and reliable working performance, operate simple and easy, control accurate, effectively can complete relevant every basic of Transient Process of Hydropower Station and test with application foundation.Be applicable to large, medium and small conventional model power station and model hydroenergy storage station.
Description
Technical field
The utility model relates to power station model test platform, specifically a kind of Transient Process of Hydropower Station integrated physical model test platform.
Background technology
Model test and numerical computations carry out scientific research, the requisite two kinds of complementary research meanses of engineer applied.Wherein, model test can not only the reliability of proof theory analysis and numerical result and accuracy, and can observe, disclose physical phenomenon in interior rule, promote the development of theoretical analysis and numerical method.
Power station generating system by piloting water transient process is fluid, machinery, electrically, the even dynamic process of complexity that intercouples of structure.On the one hand, transient process theory and numerical computations intactly consider the acting in conjunction of water electromechanical combination transient process; On the other hand, the existing needs that the method for water, mechanical, electrical separately research and achievement cannot be met power station (particularly: large-scale long aqueduct undergroundhydropower station, the hydroenergy storage station) design and running of all kinds of water-carriage system complex arrangement, so need to carry out the Transient Process of Hydropower Station globality physical analogy comprising Hydraulic Power System, mechanical system and electrical system.
Utility model content
In order to carry out the physical analogy of Transient Process of Hydropower Station globality, need to build corresponding integrated physical model test platform, this platform should by circulation, the excitation protection system same period, speed-adjusting and control system, frequency conversion commutation system, monitoring system, load system, measurement system, prototype group system, the subsystem compositions such as model channel system, and monitoring system and measurement system all comprise hardware and software two parts, other subsystems only comprise hardware, then great fluctuation process can be carried out on this platform, the experimental study of the transient process such as minor swing and hydraulic loading cycle and other relevant issues.
To achieve the above object, the structure of Transient Process of Hydropower Station integrated physical model test platform must solve the problem of two aspects, the i.e. derivation of (1) model similarity, the exploitation of the development of the hardware devices such as (2) model water channel unit, measurement, control, fictitious load and integrating, software systems.The research and apply of the problem of first aspect puts into practice comparative maturity, therefore the utility model is mainly for second aspect, i.e. the structure of the development of Transient Process of Hydropower Station integrated physical model test platform subsystem and the test platform based on the integrating of these subsystems.
The purpose of this utility model designs a kind of Transient Process of Hydropower Station integrated physical model test platform for above-mentioned present situation, the various basic and application foundation test relevant to transient process can be carried out, and test operation is simple, intelligent, convenient, the observation of experimental phenomena, record be true, comprehensively, fast, the collection of data, analyze efficient, accurately.
A kind of Transient Process of Hydropower Station integrated physical model test platform, comprises circulation 1, the excitation protection system same period 2, speed-adjusting and control system 3, frequency conversion commutation system 4, monitoring system 5, load system 6, measurement system 7, prototype group system 8 and model channel system 9; Described prototype group system 8 is connected with the last section of the upstream conduit pipe 21 of model channel system 9, the first section of downstream tail water pipeline 22 by ring flange respectively in its spiral case inlet, draft tube exit, component model generating system by piloting water; Model channel system 9 is connected with the upstream and downstream water tank of circulation 1 respectively by its entery and delivery port, realizes the entirety circulation of current; Model generating system by piloting water is provided with the sensor of measurement system 7, and described sensor is connected through the dynamic data acquisition device of analog channel with measurement system 7 by holding wire; Speed-adjusting and control system 3 is by servomotor link model machine set system 8, and the water distributor for Controlling model machine set system 8 moves; The generator of described prototype group system 8 is provided with frequency measuring device, for signal is introduced monitoring system 5, monitoring system 5 is by the measurement of the signal of telecommunication simultaneously, assign the instruction of water distributor action with the host computer of measurement system 7 simultaneously, and combine execution by the local control unit of monitoring system 5 and speed-adjusting and control system 3; The excitation protection system same period 2, frequency conversion commutation system 4, load system 6 are connected with monitoring system 5 by holding wire, the control of the host computer of monitored system 5, increase and decrease, the frequency conversion commutation of implementation model unit load, add excitation and simultaneous interconnecting.
Described circulation 1, comprises cistern 10, water pump 11, water supply line 12, backwater channel 13, upstream water tank 14, downstream water tank 141, and described water supply line 12 is connected with cistern 10, and water supply line 12 end is provided with valve and water pump 11; The water inlet pipe 15 of upstream water tank 14, downstream water tank 141 is connected with water supply line 12 respectively, and the outlet pipe 16 of upstream water tank 14, downstream water tank 141 is connected with backwater channel 13 respectively; Water supply line 12 and backwater channel 13 connection are provided with air bleeding valve 18; Water supply line 12 is also provided with electromagnetic flowmeter 19; Described water pump 11, air bleeding valve 18 introduce monitoring system 5 by holding wire, the control of monitored system 5 host computer; Electromagnetic flowmeter 19, by holding wire introduction volume examining system 7, gathers by measurement system 7 data that electromagnetic flowmeter 19 measures.
The described excitation protection system same period 2, comprises simulation excitation system and simulation synchronization system; The former is made up of single chip microcomputer, large scale integrated circuit, STD bus, and the core component of the latter is single chip microcomputer; The excitation protection system same period 2 is connected into monitoring system 5, the control of monitored system 5 host computer.
Described speed-adjusting and control system 3, comprises BPLC-II type programmable controller, digital oil cylinder and servomotor; BPLC-II type programmable controller is made up of PLC elementary cell (FX2C-64MT), A/D converting unit (FX-4AD), D/A converting unit (FX-2DA), input expanding unit (FX-16EX), digital Frequency Measuring unit, power amplifier unit, button and display unit, and manufacturer is Siemens Company; Digital oil cylinder is used for transmission, the amplification of hydraulic pressure, and realizes the circulation of hydraulic oil in oil cylinder inside; Servomotor is positioned at prototype group system 8 place, for controlling the motion of water distributor.
Described frequency conversion commutation system 4, comprises frequency converter and commutation device, and two devices come into operation when frequency conversion and switch operation instruction issuing respectively.
Described monitoring system 5, comprises host computer and local control unit; Described host computer is high-performance computer, local control unit is made up of side by side unit local control unit, speed regulator electrical ball valve control flow, microcomputer excitation screen, public local control unit, VFC screen, unit load regulation screen, bearing power screen, integrated load screen, low-voltage distribution panel group, host computer is connected with local control unit by data wire, assigns instruction, local control unit performs.The manufacturer of local control unit is Wuhan Power Science and Technology Development Co., Ltd..
Described load system 6, comprises load system, microprocessor-based monitoring device, checkout gear and warning device; Described load system is made up of resistance, electric capacity, inductance, and the microprocessor-based monitoring device of load system connects the host computer of monitoring system 5 on the one hand, connects load system on the other hand, for pressing type and the size of instruction control load system; Checkout gear, warning device are also connected with load system.
Described measurement system 7, comprises sensor, dynamic data acquisition device, host computer; Described host computer is connected with dynamic data acquisition device, and dynamic data acquisition device connects the sensor be arranged in prototype group system 8, model channel system 9 and circulation 1 by holding wire, the analog signals that pick-up transducers measures.
Described prototype group system 8, comprises shaft coupling and the support of spiral case, narrow high type draft tube, runner, water distributor, synchronous generator and the hydraulic turbine; Model spiral case, narrow high type draft tube, runner, the water distributor component model hydraulic turbine, model turbine and mold sync generator are connected to form model turbine-generator units by the shaft coupling of the hydraulic turbine, and model turbine-generator units is finally supported by support, fixing.
Described model channel system 9, comprises model water inlet 20, model upstream conduit pipe 21, model downstream tail water pipeline 22, model delivery port 23; Described model water inlet 20 is connected with the upstream water tank 14 of circulation 1, then model water inlet 20 link model upstream conduit pipe 21 one end, and the other end of model upstream conduit pipe 21 is connected with the spiral case inlet section of prototype group system 8; Tail water pipeline 22 one end, model downstream is connected with the draft tube Outlet Section of prototype group system 8, and the other end is connected with model delivery port 23, and model delivery port 23 is connected with downstream water tank 141 then.
Described sensor, includes but not limited to level sensor, pressure sensor, stroke sensor, power transformer, voltage transformer summation current transformer.
The advantage of the utility model Transient Process of Hydropower Station integrated physical model test platform is: the utility model provides hardware and software platform for carrying out the dynamo-electric transient process model test of power station water.Transient Process of Hydropower Station research has been pushed ahead major step with the integrality test of simulation load system by band model unit, not only test repeatability is good, its result is regular strong, adjust as unit and protect the change of parameter with water distributor shut-in time and Closing Law, generating unit speed raises, the maximum flowing pressure of spiral case and draft tube minimum flowing pressure time of origin order and the relation etc. with the water distributor shut-in time thereof; And under certain precision, quantitatively can provide unit and adjust the size of protecting parameter, especially generating unit speed lift-off value and the minimum flowing pressure of draft tube import (comprising the minimum flowing pressure distribution of admission section).And minor swing and hydraulic loading cycle test can be carried out, correctly reflect the impact of hydraulic turbine operating characteristic, speed regulator major parameter and diversion and power pipe-line system hydraulic characteristic(s), for scientific research, engineering design, hydroelectric station operation provide can the foundation of reference.In addition contrast with numerical result, for improving Mathematical Modeling, raising numerical simulation accuracy is laid a good foundation.
The utility model integrated level is high, stable and reliable working performance, operate simple and easy, control accurate, effectively can complete relevant every basic of Transient Process of Hydropower Station and test with application foundation.Be applicable to large, medium and small conventional model power station and model hydroenergy storage station.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present utility model.
Fig. 2 is the structural representation of circulation.
Fig. 3 is the structural schematic block diagram of BPLC-II type programmable controller hardware system.
Fig. 4 is frequency conversion commutation system asynchronous motor forward and backward wiring diagram.
Fig. 5 is the structural schematic block diagram of monitoring system.
Fig. 6 is the structural representation of measurement system.
Fig. 7 is model channel system schematic diagram.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is further described.
As shown in Figure 1; a kind of Transient Process of Hydropower Station integrated physical model test platform, is made up of following subsystem: circulation 1, the excitation protection system same period 2, speed-adjusting and control system 3, frequency conversion commutation system 4, monitoring system 5, load system 6, measurement system 7, prototype group system 8, model channel system 9.Prototype group system 8 is connected with the last section of the upstream pressure conduit pipe of model channel system 9 and the first section of downstream pressure tail water pipeline by ring flange with draft tube exit respectively at its spiral case inlet, component model generating system by piloting water; Model generating system by piloting water is connected with the upstream and downstream water tank of circulation 1 by its upstream and downstream inlet/outlet, realizes the entirety circulation of current; Model generating system by piloting water arranges various kinds of sensors, by sensor by the hardware platform of holding wire through analog channel introduction volume examining system 7: dynamic data acquisition device; By the servomotor of speed-adjusting and control system 3, speed-adjusting and control system 3 is introduced model generating system by piloting water again, realize the control of the water distributor motion of speed-adjusting and control system 3 pairs of prototype group systems; Model generator arranges frequency measuring device, and signal is introduced monitoring system 5, monitoring system 5 is by the measurement of the signals of telecommunication such as Current Voltage simultaneously, assign the instruction of water distributor action together with the host computer of measurement system 7, and combine execution by the local control unit of monitoring system 5 and speed-adjusting and control system 3; The excitation protection system same period 2, frequency conversion commutation system 4, load system 6 are also combined with monitoring system 5 by holding wire, the control of the host computer of monitored system 5, increase and decrease, the frequency conversion commutation of implementation model unit load, add the function such as excitation and simultaneous interconnecting.
(1) circulation
Capital equipment comprises cistern, water pump, water supply line, backwater channel, water tank, water tank water inlet pipe and water outlet pipe, valve, air bleeding valve, electromagnetic flowmeter, water pump local control unit and other auxiliary equipment etc., and structural configuration as shown in Figure 2.During circulation work, water pump local control unit starts water pump, draws water, water supply line is full of water and forms certain hydraulic pressure from cistern, then by the arm of being drawn by water supply line to cistern water supply; Valve on water supply line and arm can be used for regulating flow, the electromagnetic flowmeter entering water tank then to play the effect of pipeline air exhaust water and emergent draining for Real-Time Monitoring flow, air bleeding valve; Par groove is installed in water tank and maintains constant level, par groove overflow and the water that goes out flows into backwater channel by radiator drain/canal after energy dissipating, finally flow into cistern, complete circulation.
(2) the excitation protection system same period
Comprise simulation excitation system and simulation synchronization system.
Simulation excitation system: select the TDWLT-01 microcomputer excitation regulator that Electronic Equipment Factory of Wuhan Water Conservancy and Electric Power Univ develops.This adjuster with the 80C198 single chip microcomputer of American I NTEL company for core, be aided with large scale integrated circuit, adopt the novel excitation adjusting device that complete dual-channel technology, two-shipper blend modes of operation, STD bus structure form, there is perfect voltage-regulation, Current adjustment, Reactive-power control, power factor regulation pattern, be applicable to the needs of the various methods of operation in different power station; There is the various control rules such as PID, PD, PSS, EOC, NEOC, to meet the needs of system stability; There is perfect protecting control function, be configured with breaking protection, cross encourage restriction, top value restriction, lowly encourage restriction, underexcitation restriction, V/F limit, by mistake encourage by force protection, unloaded overvoltage protection etc.; There is the difference coefficient that can set, ensure between generator without the distribution of work.
Simulation synchronization system: the CZT-A type microcomputer automatic sub-synchronous device selecting Electronic Equipment Factory of Wuhan Water Conservancy and Electric Power Univ to develop.This device with the 80C196 single chip microcomputer of American I NTEL company for core, make full use of computing and the arbitration functions of microcomputer, carry out regulation and control according to the frequency difference of the process same period, phase angle difference Mathematical Modeling, substantially reduce the grid-connected time, generating function is connected to the grid rapidly and accurately.Thus have the quick of automatic self synchronizing and penecontemporaneous grid-connected shock-free dual superiority concurrently.
(3) speed-adjusting and control system
Adopt the BPLC-II type programmable digital cylinder speed regulator of utility model people development, this speed regulator is made up of BPLC-II type programmable controller, digital oil cylinder and servomotor.
Servomotor.Power part in turbine gate mechanism transmission system is the executing agency of speed regulator.The structure be made up of single straight-cylinder and piston, referred to as straight-cylinder servomotor.When hydraulic turbine load changes, the pressure oil controlled by speed regulator main control valve enters the oil cylinder pushing servomotor piston of servomotor; When the piston is moving, control loop is rotated by pull bar; Control loop reaches the object controlling water distributor again by connecting rod, pivoted arm.
Digital oil cylinder.Digital oil cylinder has concentrated all functions of existing hydraulic technique, it directly can accept digital pulse signal that special digital controller, computer and Programmable Logic Controller (PLC) send and reliably working, pulse frequency representation speed, pulse sum represents stroke, one_to_one corresponding.Digital cylinder only need connect hydraulic oil source (if power output does not need external oil sources below at 1-2 ton), do not need other hydraulic valve piece any and sensor, all functions are all directly set by adjuster, and during conventional hydraulic is controlled, complicated valve port control technology changes into directly given electron controls technology thoroughly.
BPLC-II type programmable controller: BPLC type microcomputer based regulator able to programme is on the basis of former PLC-I and PLC-II type microcomputer based regulator able to programme, the new microcomputer based regulator able to programme released after improving and improving.It is except retaining except the feature such as former PC-I and PC-II type structure is simple, safe and reliable, function admirable, also flexible configuration multiple regulatory function (adjustment of frequency adjustment, aperture, power adjusting etc.) and digital electric manual, and achieve software digital frequency measurement.Meanwhile, intelligence degree is also higher, breaks, feedback breaks, power supply disappears and the fault-tolerant and defencive function of adjuster fault is stronger to frequency.Therefore the method for operation is more flexible, modification stability, better reliability.Hardware system composition structure is shown in Fig. 3.
BPLC-II type microcomputer based regulator able to programme adopts the FX2N series of PLC elementary cell of MIT and corresponding special module composition, and adjuster all adopts modular construction, substantially increases the reliability of system.This adjuster can form the programmable digital cylinder speed regulator of complete set, for controlling the turbine-generator units of various different types with digital oil cylinder.It has following basic function:
By frequency (i.e. rotating speed) change, realize PID and control;
By power setting (or by aperture setting), realize PI and regulate;
Be provided with digital electric Non-follow control, carry out two-way from motion tracking between digital electric hand control and automation mode, the switching undisturbed between two kinds of modes can be realized;
Can to realize after unit starting automatically tracking network frequently or frequency setting value (net frequently disappear time or artificial setting situation under), and realize optimum start-up process control and the quick accurate same period;
Grid-connected rear automatic input Man-made Dead, can make frequency modulation stable operation of unit;
Can by the change of head automatic adjusting no-load opening and restriction maximum capability operation.
This adjuster has following features:
Be provided with and net the fault tolerance that frequently breaks.When unit is when mode starts frequently for automatic tracking network, if net disappears or broken string frequently, adjuster can be switched to the given regulative mode of frequency (50.00HZ) automatically, and ensures that unit normal boot-strap is grid-connected and provide alarm signal simultaneously.
The machine that is provided with frequently breaks fault tolerance.Be no matter unloaded or be incorporated into the power networks, when there is machine class frequency broken string (or disappearance), adjuster can automatic discrimination, and provides alarm signal, meanwhile, adopts different fault-tolerant way respectively: time grid-connected, gets net frequently as machine frequently; Time unloaded, first volitional check unit aperture is quiescent value, then is switched to digital electric Non-follow control.
Be provided with feedback broken string fault tolerance, during generator operation, if feedback broken string, then can ensure that unit operation operating mode is substantially constant, and provide alarm signal.
Be provided with working power disappearance fault tolerance, when alternating current-direct current working power all disappears, can ensure that unit load is constant, and when working power is recovered, automatically can recover automatic regulation function.
Automatically hydraulic manual controlling functions is turned when being provided with adjuster fault.In operation when self diagnosis has adjuster fault, can mechanical, hand-driven be automatically switched to, and provide alarm signal.
BPLC-II type programmable digital cylinder speed regulator: combined by BPLC-II type programmable controller and digital oil cylinder and namely form BPLC-II type programmable digital cylinder speed regulator.Speed regulator digital oil cylinder is connected with turbine gate mechanism controlling organization, can realize the control to turbine-generator units rotating speed and load.Its mechanical part, without the need to any Hydraulic Elements, only needs constant pressure oil source, and cut-in pressure hydraulic fluid port and oil return opening can form the hydraulic system of any function, and it is Digital Signals completely, reproducible.
(4) frequency conversion commutation system
Capital equipment comprises frequency converter and commutation device (for pump turbine group) etc.
Model pump turbine group has the function of drawing water and generating electricity concurrently, and doublely does generator and motor.This just requires that model pump turbine group can realize rotating backward of rotor as required.
The direction of rotation of threephase asynchronous is identical with turning to of its rotating excitation field, therefore, as long as change the direction of rotation of rotating excitation field, asynchronous machine just can be made to reverse, that is change the phase sequence of motor.As long as any two that receive in three power lines of stator winding are exchanged during concrete operations.As shown in Figure 4.
(5) monitoring system
Monitoring system adopts that close-loop control mode controls test platform all devices (comprising turbine-generator units, speed regulator, field regulator, synchronous device, load system, gate valve etc.), monitors, accident treatment, data processing etc.Take the full distributed computer monitoring under open environment, be functionally divided into two-stage, be i.e. master system and local control unit system, and by the manipulation of master control system software simulating host computer and local control unit.
Master system.Master system is the core of computer supervisory control system, be responsible for the operation of monitoring test platform all devices, operation, good man-machine interface means are provided, be the Decision Control layer of system, there is centralized Control, operation, monitoring, online and off-line revises parameter value, emulate and develop software function.Operation system setting has master control system software.
Master control system software adopts modular design, and system structure parameter all adopts the form of variable.Software kit is containing instruction module and data processing.There is following major function:
1, various operation is completed: to open, shutdown group, the conversion of operating mode, the combined floodgate of breaker, trip operation, the Control protection of measurement system, meritorious, idle control;
2, there is the function of memory operation personnel, operating time, action name and operating result;
3, picture function: display system allocation plan, main wiring diagram, monoblock wiring diagram, visual plant wiring diagram, oil, gas, water wiring diagram, electrical parameter list, non electrical quantity list, electricity bar, accident and fault alarm picture.Whole picture dynamically updates;
4, warning function: there is fault alarm, accident alarming, the functions such as abnormal alarm.Automatic spring alarm screen during warning, warning title, alarming value, time of fire alarming when record is reported to the police;
When 5, having all unit dates, historical data comprises electrical parameter, non-electrical parameter, operating condition, operating time, operating result, fault, the storage of accident, query function;
6, can control (needing corresponding interface standard) load simulation screen according to setting;
7, can control (needing corresponding interface standard) measurement system according to setting;
8, there is self-timing generating run report capability;
9, various equipment working state can be shown;
10, there is communication monitoring function, capable of automatic alarm when occurring abnormal when communicating.
Local control unit.Monitoring system in the utility model is that every platform model unit arranges a local control unit (LCU).Each local control unit directly completes real-time data acquisition and the pretreatment of production process (comprising transient process), and location mode monitors, regulation and control, and with the function such as the liaison of host computer.
Local control unit LCU arranges respectively by different control object, and is connected by network and master system.Computer supervisory control system realizes the monitoring to all units in full power station by LCU, and each LCU completes respective management.
Local control unit is made up of Programmable Logic Controller (PLC) and industrial computer.PLC is responsible for data monitoring and the control of unit, gathers unit operational factor and status information of equipment, realizes the functions such as automatic sequence, change working, power adjusting.The distribution of industrial computer fulfillment database and function, is responsible for the data accepting local control level and electric quantity acquisition unit, forwards the operation control command that master control layer passes down, and organising data is surfed the Net, and can realize local control.
The unit unit sequence device (PLC) that now automatic operation controlling functions is made up of Programmable Logic Controller realizes.Time normal, PLC is as a part of unit local control unit (LCU), together accept with microcomputer excitation regulator and microcomputer governor the order that manually sent by computer keyboard by host computer or Central Control Room operations staff, by executing agency unit carried out to controlling and regulating; Each LCU all with industrial computer as existing man-machine interactive means or power-up sequence simulated operation panel and key operation means; can divorced from computer network system independent operating; can also realize the manual operation of unit substep, the startup-shutdown realizing unit with microcomputer excitation regulator together with microcomputer governor controls and power adjusting.
In addition, because LCU each several part can independent operating, even if industrial computer fault, unit still can realize startup-shutdown by sequence PLC.LCU has local monitoring function, and is provided with man-machine interface interface, can depart from master stage computer system independent operating, and the hardware and software function of LCU is modularization, standardized.
The mode needing the analog quantity of supervision, quantity of state and accident, fault-signal etc. to connect electricity with field bus communication mode or relay sky sends computer supervisory control system to.
Due to laboratory test object and object and actual power station difference to some extent, so in training station, the signal utilizing PLC to simulate various laboratory not have, makes system closer to true environment.
Every platform unit allocation amount is:
(1) export controlled quentity controlled variable: speed regulator start order, order shut down by speed regulator, and speed regulator increases meritorious, and speed regulator subtracts meritorious; speed regulator emergency shutdown makes, and the same period makes, and excitation drops into order, excitation cease-and-desist order; excitation increases idle, and excitation subtracts idle, jumps breaker; indicator lamp for subsequent use, start makes lamp, shuts down and makes lamp; breaker closes indicator lamp, and breaker divides indicator lamp, and emergency shutdown makes lamp; tailwater control 1, tailwater control 2, measurement system controls 1.
(2) input switch amount: circuit breaker position, emergency shutdown make, shutdown order, accident involution, start order, excitation fault signal, the same period fault-signal, governor fault signal, tail water status signal, upper pond level control signal, measurement system status signal.
The design of monitoring system:
Monitoring system allocation plan is as Fig. 5, and computer supervisory control system is functionally divided into two-stage: master stage and unit controls level.
Master stage: be made up of computer and Central Control Room relevant devices is real-time Surveillance center, is responsible for automatic business processing.
The center of computer supervisory control system is a set of master/slave switching computer system, the control in process power station.Supervision, data processing etc.The system that main frame uses is WinNT multitask, open system, and programmed environment is Boland C++Builder5.5.
Communication is used for and control system and other computer systems.Monitoring system also can arrange some remote terminals, for understanding running status and the technical parameter of capital equipment in power station at any time.21 inch color monitors are placed on Central Control Room console, and experimenter can monitor at any time.System configuration two high speed laser printers, can timed print or calling printing reports, accident and various warnings etc.
Unit controls level: each control unit will complete that real-time data acquisition and location mode monitor, adjustment and controlling, with the function such as host computer communicates.
The unit sequential control that unit automatic control function is made up of Programmable Logic Controller (PLC) realizes.When unit normally runs in a fully automatic manner, PLC accepts the order that host computer or operations staff send, and carries out controlling and adjustment by executing agency to unit.Because PLC can run independent of host computer, even if host computer fault, unit also can by PLC manually control realization startup-shutdown and other control.
(6) load system
According to the needs of Transient Process of Hydropower Station scientific research and engineer applied, electrical load simulation system should have following major function:
1, the burden with power of generator and load or burden without work all can regulate automatically, burden with power P=0 ~ 12kW, minimum adjustment amount: 0.1kW, load or burden without work Q=0 ~ 12kVAR, minimum adjustment amount: 0.05kVAR.
2, power factor can adjust in 0.7 ~ 0.95 scope, and minimum adjustment amount 0.1, error is no more than 0.05.
3, during load change, utilize and automatically control to make power factor synchroballistic.
4, during certain unit tripping removal of load, can Synchronous resection with load.
5, every platform machine all can manually and automatically be incorporated to island network or infinitely great electrical network, and can manually and the burden with power of automatic synchronization switching and load or burden without work, also can manually and automatic independent switching burden with power or load or burden without work.
6, whole load system can realize micro computer monitoring.
7, the two poles of the earth bus is equipped with corresponding meter meter, automatically records the change of each electrical parameter, and is equipped with power supply and superpotential acoustic-optic alarm in the other direction to every platform generator.
According to the adjustment of load and control overflow, with following design example, design is described:
The adjustment of burden with power P: each phase resistance load of every platform machine is all made up of 7 resistance, is respectively 1444 Ω, 722 Ω, 361 Ω, 180.5 Ω, 90.25 Ω, 45.125 Ω, 22.5625 Ω, the power of representative is respectively 0.1/3KW, 0.2/3KW, 0.4/3KW, 0.8/3KW, 1.6/3KW, 3.2/3KW, 6.4/3KW.Each resistance is equipped with corresponding fling-cut switch.
Load or burden without work Q or power factor
adjustment: every mutually equal load or burden without work Q adjustment System be made up of 2 inductance L, 8 electric capacity C by a group, each L or C is equipped with corresponding fling-cut switch, wherein inductance L 1=40mH, L2=35mH (L2 is the tap of L1); 8 electric capacity C are respectively 1 μ F, 2 μ F, 4 μ F, 8 μ F, 16 μ F, 32 μ F, 64 μ F, 128 μ F.According to predetermined burden with power P and corresponding power-factor cos, utilize formula
obtain C, then realized the adjustment of load or burden without work Q by the fling-cut switch of C, (inductance L preset by burden with power P and power factor
determine, when
and during P=11.4 ~ 12kW, L gets 35mH; In other situations, L all gets 40mH).
Power factor
synchronous adjustment: according to P,
with corresponding L, after calculating C, by their gauge tap, utilize self-con-tained unit to realize the synchronism switching of P, Q state, thus realize P and
synchronous adjustment.
Synchronous resection corresponding load during unit removal of load: during for realizing certain machine removal of load, can the corresponding load of Synchronous resection, the design adopts following scheme: preset the load system of itself according to exerting oneself of every platform generator, when this machine removal of load, excise the corresponding load system of this machine by linked switch (as 1TG linkage 21DZ).
The micro computer monitoring of load system: the design is that load system is equipped with the direct current auxiliary reclay (component codes starts with J) of automatic control, corresponding power supply (DC24V) and corresponding microprocessor-based monitoring device, (component parameters configures by 2j mode can to realize whole load system, switching value can be provided by binary mode, thus carry out control that is meritorious and load or burden without work) micro computer monitoring.Especially it should be noted that: need first to throw inductance throw electric capacity again when throwing load or burden without work, and need first to excise electric capacity when excising load or burden without work and excise inductance again.
A set of multifunction electric meter is all installed in the porch of the exit of testing and alarm: at every platform generator---transformer group and large net, can measure simultaneously U, I, P, Q,
deng.Every platform generator fills a block pointer formula voltmeter so that monitoring machine terminal voltage intuitively in addition, whether power to understand generator in time in the other direction and whether occur overvoltage, to a set of reverse power supply of installing of every platform generator and superpotential acoustic-optic alarm, comprise automatic control and alarm device (when
time send sound and optic signal), wherein all there is voice signal when oppositely power supply and overvoltage in electric bell, and signal lamp is redness when power supply in the other direction; Be yellow when there is overvoltage.
(7) measurement system
Overall system design.Transient Process of Hydropower Station virtual measurement analytical system is made up of general hardware platform and application software two large divisions.The collection, amplification, analog/digital conversion etc. of the main settling signal of hardware.The functions such as the main completion system structural parameters setting of software, data acquisition, data display, data analysis and data processing.The principle of this measure analysis system development is: hardware device needed for system all adopts the high-quality product of International or National renowned company; Software then utilizes LabWindows/CVI Software Development Platform as required by designer's self-developing, and the utility model is claimed hardware configuration only, and software section is that those skilled in the art can obtain according to prior art and common practise.
System hardware: any tested physical quantity (electricity or non electrical quantity), after various kinds of sensors and modulate circuit, is all convertible into analog quantity, pulsed quantity and switching value three class signal.Therefore, native system designs according to above three class signals, instead of according to the concrete physical quantity of measurand, such system just has versatility.System hardware structure is shown in Fig. 6.
This hardware system converts card AT-MIO-64E-3 (64 road A/D, 8 road I/O, 2 tunnel 32 digit pulses), two piece of 8 32, tunnel high precision timer card PCI-6602, one piece of 96 way switch amount input-output card PCI-DIO-96 by a high-performance computer, Liang Kuai 64 tunnel high-speed AD and corresponds to the Signal-regulated kinase of every road signal or isolation module forms.Wherein, all computer cards are the product of National Instruments (NI), and they are installed on computer-internal; All Signal-regulated kinase or isolation module and computer body are installed in a standard 19 cun of racks.The port number of native system analog quantity, pulsed quantity and switching value and the performance indications of each passage are (table 1):
The port number of table 1 analog quantity, pulsed quantity and switching value and the performance indications of each passage
According to the requirement of Transient Process of Hydropower Station model test content, tested to as if constant duty under, the depth of water of the piezometric head of each section of water levels of upstream and downstream, pressure conduit, non-pressure tunnel or each section of open channel, surge-chamber or gate shaft initial constant water level, unit quote flow, tailwater tunnel total flow, model unit rated speed, water distributor aperture or servomotor travel position etc.; And the active power of model unit, apparent energy, three-phase voltage, electric current etc.The change etc. of the bore of the change (comprising the pressure oscillation process of spiral case and draft tube import) of the surge pressure of surge-chamber or gate shaft SEA LEVEL VARIATION, each measuring point of pressure conduit in transient process, non-pressure tunnel or each measuring point of open channel or the change of the depth of water, servomotor travel displacement and generating unit speed.And the change of model unit electricity such as active power, apparent energy, three-phase voltage, electric current in transient process.Corresponding tester is in table 1.
Table 1 tested object and various kinds of sensors
In above-mentioned measurand, pressure, flow, voltage, electric current, displacement, strain, active power, reactive power, rotating speed and aperture etc. belong to analog quantity; Flow velocity is pulsed quantity; State and the control in real time of the valve such as draining valve, water compensating valve belong to switching value.Only need the total number of channels shared by the measuring point of all kinds physical quantity and Chinese name corresponding to every passage be inserted in system architecture module by analog quantity, pulsed quantity and switching value respectively during test, system just can complete mating of hardware corridor and software channel, thus realizes the data acquisition of various parameter in process of the test, data display, data analysis, data processing very easily.
(8) prototype group system
Model turbine is customized by hydraulic turbine producer, and the scope of customization comprises the shaft coupling and support etc. of spiral case, narrow high type draft tube, runner, water distributor, synchronous generator and the hydraulic turbine.Model geometric size is determined by model scale, and bearing, the support equidimension of model turbine install requirement easily to meet unit and testing sensor etc., need to provide drawing to producer.
Model generator is synchronous generator, and by the restriction of magnetic level logarithm, rotating speed can only be the fixed value of stepping.Therefore once geometry guide is determined, then model generator rotating speed is just thereupon fixed.But this rotating speed often has certain difference with generator synchronous rotational speed, two close synchronous rotational speed inverse geometry guides are selected when modelling, then consider according to test site and test funds, finally determine geometry guide and synchronous generator synchronous rotational speed, so just can ensure the similar of model turbine operating point, flywheel moment etc.
(9) model channel system
First determine the cellular system needing to carry out overall model test according to studied object, and carry out designing and arranging.Comprise water inlet, upstream conduit pipe/channel, tailrace tunnel/tailrace channel until downstream river course.Preliminary geometry guide is determined according to test site and model test object.
Except model unit, draft tube and tailrace channel, other flow passage components, comprise pressure diversion pipeline, bifurcated pipe and tailrace tunnel and all adopt transparent organic glass or steel pipe manufacturing.The experimentally restriction in place, room, model geometric guide is about 1:30 ~ 40, the roughness of lucite is about 0.008, convert prototype to, its roughness equals 0.0141 ~ 0.0148, between the average roughness of concrete and maximum roughness, make the loss of flood peak of model equipment slightly bigger than normal, and other materials roughness value is larger.Will meet roughness similarity completely, unless the geometry guide of model equipment increases again, but the scale of model equipment embarrasses common laboratory to bear.
Operation principle of the present utility model and process as follows: 9 subsystems organically form Transient Process of Hydropower Station integrated physical model test platform.Prototype group system combines with model channel system, and namely spiral case inlet and the conduit pipe end section of model unit is connected, draft tube export and be connected with tail water pipeline head section, formation power station model generating system by piloting water; Again model generating system by piloting water is placed in circulation: water inlet is connected with upstream water tank, delivery port is connected with downstream water tank; Model generating system by piloting water is arranged various kinds of sensors (shown in table 2), by the hardware platform (vasculum, high-performance computer) of sensor by holding wire introduction volume examining system; By hydraulic turbine servomotor (executing agency of speed-adjusting and control system), speed-adjusting and control system is introduced model generating system by piloting water again, implementation model generating system by piloting water can be handling; Model generator arranges frequency measuring device, and signal is introduced monitoring system, monitoring system is by the measurement of the signals of telecommunication such as Current Voltage simultaneously, the various test run operations of implementation model unit together with governing system; The excitation protection system same period, frequency conversion commutation system, load system are combined with monitoring system simultaneously, improve the function of this platform.Complete the structure of Transient Process of Hydropower Station integrated physical model test platform like this.
Test carried out by this platform, operates according to the following procedure:
1, debug, preparation: mainly carry out measurement system, various kinds of sensors, the calibration of flowmeter and demarcation.For pressure sensor, first complete the exhaust work of sensor, then utilize pressure testers to calibrate one by one, calibrate errorless after, the hardware platform (vasculum, high-performance computer) of throughput examining system is demarcated, and preserves calibration result; For the flow rate-measuring device such as electromagnetic flowmeter, differential pressure flowmeter, weight method flow calibration instrument or triangular-notch weir etc. can be utilized to demarcate; For signals of telecommunication such as electric current, voltage, rotating speeds, can be undertaken calibrating by signal generator and demarcate; For water distributor aperture, the servomotor stroke of the hydraulic turbine, the corresponding relation of maximum opening, aperture and servomotor stroke can be recorded before formal test starts, be total to test below and interpretation of result use.
2, formal test is started: the power supply opening the instrument and equipment of each system.First the keying situation of each valve on inspection model generating system by piloting water: the valve on circulatory system water supply line keeps standard-sized sheet; When moisturizing is carried out to upstream water tank, upstream tank intake valve of water standard-sized sheet, downstream tank intake valve of water complete shut-down, when moisturizing is carried out to downstream water tank, upstream tank intake valve of water complete shut-down, downstream tank intake valve of water standard-sized sheet; Air bleeding valve keeps standard-sized sheet, and other draining valves on model water channel and unit keep complete shut-down.Then turn on pump instruction (automatic operation is completed by host computer, manual operation completed by local control unit) is assigned by monitoring system, water-filling is carried out to recirculated water water supply line, then moisturizing is carried out to upstream and downstream water tank, finally model water channel is full of water.
3, according to concrete test objective and needs, assign start by monitoring system, draw water (model pump turbine group), grid-connected, no-load running, increasing load, load shedding, removal of load, the instruction such as tripping, complete by speed-adjusting and control system; Testing in the process of carrying out, open amount examining system, gathers required physical quantity, and preserve, show, analysis etc.
4, after having tested, first assign halt instruction by monitoring system, then assign termination of pumping instruction, model unit and circulation are quit work.After they quit work, open the draining valve on model generating system by piloting water, by water emptying wherein, be beneficial to the maintenance of model test platform.
The utility model technical merit, method of operating, functions of the equipments are advanced; Test repeatability is good, its result is regular strong; The transient process correlation tests such as steady flow, great fluctuation process, minor swing, hydraulic loading cycle can be carried out; This platform intergration degree is high, stable and reliable working performance, operate simple and easy, control accurate, effectively can complete relevant every basic of Transient Process of Hydropower Station and test with application foundation.Be applicable to large, medium and small conventional model power station and model hydroenergy storage station.
Claims (8)
1. a Transient Process of Hydropower Station integrated physical model test platform, is characterized in that: comprise circulation (1), the excitation protection system same period (2), speed-adjusting and control system (3), frequency conversion commutation system (4), monitoring system (5), load system (6), measurement system (7), prototype group system (8) and model channel system (9); Described prototype group system (8) is connected with the last section of the upstream conduit pipe (21) of model channel system (9), the first section in downstream tail water pipeline (22) by ring flange respectively in its spiral case inlet, draft tube exit, component model generating system by piloting water; Model channel system (9) is connected with the upstream and downstream water tank of circulation (1) respectively by its entery and delivery port, realizes the entirety circulation of current; Model generating system by piloting water is provided with the sensor of measurement system (7), and described sensor is connected through the dynamic data acquisition device of analog channel with measurement system (7) by holding wire; Speed-adjusting and control system (3) is by servomotor link model machine set system (8), and the water distributor for Controlling model machine set system (8) moves; The generator of described prototype group system (8) is provided with frequency measuring device, for signal being introduced monitoring system (5), monitoring system (5) is by the measurement of the signal of telecommunication simultaneously, assign the instruction of water distributor action with the host computer of measurement system (7) simultaneously, and combine execution by the local control unit of monitoring system (5) and speed-adjusting and control system (3); The excitation protection system same period (2), frequency conversion commutation system (4), load system (6) are connected with monitoring system (5) by holding wire, the control of the host computer of monitored system (5), increase and decrease, the frequency conversion commutation of implementation model unit load, adds excitation and simultaneous interconnecting;
Described circulation (1), comprise cistern (10), water pump (11), water supply line (12), backwater channel (13), upstream water tank (14), downstream water tank (141), described water supply line (12) is connected with cistern (10), and water supply line (12) end is provided with valve and water pump (11); The water inlet pipe (15) of upstream water tank (14), downstream water tank (141) is connected with water supply line (12) respectively, and the outlet pipe (16) of upstream water tank (14), downstream water tank (141) is connected with backwater channel (13) respectively; Water supply line (12) and backwater channel (13) connection are provided with air bleeding valve (18); Water supply line (12) is also provided with electromagnetic flowmeter (19); Described water pump (11), air bleeding valve (18) introduce monitoring system (5) by holding wire, the control of monitored system (5) host computer; Electromagnetic flowmeter (19), by holding wire introduction volume examining system (7), gathers electromagnetic flowmeter (19) data measured by measurement system (7);
Described measurement system (7), comprises sensor, dynamic data acquisition device, host computer; Described host computer is connected with dynamic data acquisition device, dynamic data acquisition device connects the sensor be arranged in prototype group system (8), model channel system (9) and circulation (1) by holding wire, the analog signals that pick-up transducers measures;
Described model channel system (9), comprises model water inlet (20), model upstream conduit pipe (21), model downstream tail water pipeline (22), model delivery port (23); Described model water inlet (20) is connected with the upstream water tank (14) of circulation (1), then conduit pipe (21) one end, model water inlet (20) link model upstream, the other end of model upstream conduit pipe (21) is connected with the spiral case inlet section of prototype group system (8); Tail water pipeline (22) one end, model downstream is connected with the draft tube Outlet Section of prototype group system (8), the other end is connected with model delivery port (23), and model delivery port (23) is connected with downstream water tank (141) then.
2. Transient Process of Hydropower Station integrated physical model test platform as claimed in claim 1, is characterized in that: the described excitation protection system same period (2), comprises simulation excitation system and simulation synchronization system; The excitation protection system same period (2) is connected into monitoring system (5), the control of monitored system (5) host computer.
3. Transient Process of Hydropower Station integrated physical model test platform as claimed in claim 1, is characterized in that: described speed-adjusting and control system (3), comprises BPLC-II type programmable controller, digital oil cylinder and servomotor; BPLC-II type programmable controller is made up of PLC elementary cell, A/D converting unit, D/A converting unit, input expanding unit, digital Frequency Measuring unit, power amplifier unit, button and display unit; Digital oil cylinder is used for transmission, the amplification of hydraulic pressure, and realizes the circulation of hydraulic oil in oil cylinder inside; Servomotor is positioned at prototype group system (8) place, for controlling the motion of water distributor.
4. Transient Process of Hydropower Station integrated physical model test platform as claimed in claim 1, it is characterized in that: described frequency conversion commutation system (4), comprise frequency converter and commutation device, two devices come into operation when frequency conversion and switch operation instruction issuing respectively.
5. Transient Process of Hydropower Station integrated physical model test platform as claimed in claim 1, is characterized in that: described monitoring system (5), comprises host computer and local control unit; Described host computer is high-performance computer, local control unit is made up of side by side unit local control unit, speed regulator electrical ball valve control flow, microcomputer excitation screen, public local control unit, VFC screen, unit load regulation screen, bearing power screen, integrated load screen, low-voltage distribution panel group, host computer is connected with local control unit by data wire, assigns instruction, local control unit performs.
6. Transient Process of Hydropower Station integrated physical model test platform as claimed in claim 1, is characterized in that: described load system (6), comprises load system, microprocessor-based monitoring device, checkout gear and warning device; Described load system is made up of resistance, electric capacity, inductance, and the microprocessor-based monitoring device of load system connects the host computer of monitoring system (5) on the one hand, connects load system on the other hand, for pressing type and the size of instruction control load system; Checkout gear, warning device are also connected with load system.
7. Transient Process of Hydropower Station integrated physical model test platform as claimed in claim 1, it is characterized in that: described prototype group system (8), comprise shaft coupling and the support of spiral case, narrow high type draft tube, runner, water distributor, synchronous generator and the hydraulic turbine; Model spiral case, narrow high type draft tube, runner, the water distributor component model hydraulic turbine, model turbine and mold sync generator are connected to form model turbine-generator units by the shaft coupling of the hydraulic turbine, and model turbine-generator units is supported fixing by support.
8. Transient Process of Hydropower Station integrated physical model test platform as claimed in claim 1, it is characterized in that: the sensor of described measurement system (7), include but not limited to level sensor, pressure sensor, stroke sensor, power transformer, voltage transformer summation current transformer.
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| CN104458316A (en) * | 2014-12-31 | 2015-03-25 | 武汉大学 | Overall physical model test platform for transient process of hydropower station |
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| CN104458316A (en) * | 2014-12-31 | 2015-03-25 | 武汉大学 | Overall physical model test platform for transient process of hydropower station |
| CN104458316B (en) * | 2014-12-31 | 2017-02-22 | 武汉大学 | Overall physical model test platform for transient process of hydropower station |
| CN108547250A (en) * | 2018-03-02 | 2018-09-18 | 中国水利水电科学研究院 | Simulation power station Stoplog gate stratified pumping, which is got rid of, increases load test system and method |
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| CN109361233A (en) * | 2018-10-16 | 2019-02-19 | 华北电力大学 | Double-fed type variable-ratio hydroenergy storage station output power Dynamic Process Modeling method |
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