CN202795030U - Control and protection system of low voltage generator set - Google Patents
Control and protection system of low voltage generator set Download PDFInfo
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- CN202795030U CN202795030U CN2012205115614U CN201220511561U CN202795030U CN 202795030 U CN202795030 U CN 202795030U CN 2012205115614 U CN2012205115614 U CN 2012205115614U CN 201220511561 U CN201220511561 U CN 201220511561U CN 202795030 U CN202795030 U CN 202795030U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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Abstract
The utility model discloses a control and protection system of a low voltage generator set. The control and protection system of the low voltage generator set includes a display screen, a direct view instrument, a manual operation control button, a transfer switch, an isolating disconnecting link, a frame-type universal circuit breaker, a current transformer set, a voltage transformer set, a microcomputer-type integrated control and protection device, an SCR (Silicon Controller Rectifier) excitation output module and an SCR speed-regulating output module. The microcomputer-type integrated control and protection device includes a main CPU (Central Processing Unit) module, a switching value input module, a switching value output module, a DC temperature sampling module, an AC sampling protection module and an excitation speed-regulating control module. The control and protection system of the low voltage generator set provided by the utility model realizes the control and protection of the 400V low-voltage water-turbine generator set in a centralized manner. Onsite automatic and manual operation requirements are met fully. The automation degree of a power station is improved. The working strength of power station operation maintenance personnel is reduced. And the control and protection system of the low voltage generator set is high in cost performance and practical applicability.
Description
Technical field
The utility model relates to a kind of control protection system of low pressure unit, particularly a kind of control protection system of low-pressure water turbine generator group.
Background technology
China small power station resource is very abundant, and conventional equipment and traditional control mode are generally adopted in most of small hydropower station sporadic developments, on the spot power supply; Particularly village small station (AC400V low pressure unit); for reducing cost, operating equipment for water turbines and generator excitation equipment are very simple and easy, and automaticity is low; control protection device category is various, complicated operation, difficult in maintenance, operating cost is high, integrated management is difficult.For realizing small power station in rural automatic technology transformation and applying, solve the unmatched problem of manipulater, energizing apparatus and requirements for automatic control of original hydrogenerator assembly cover, need use of the new technology, develop the support equipment that is fit to small power station's automatic improving, systematized solution is provided.
Summary of the invention
The purpose of this utility model is to solve original technology and automatically controls the low problem of degree, and a kind of integral low pressure unit generation control protection system is provided, and the functions such as the protection of generator, control, measurement, data communication are concentrated on one.
The technical solution of the utility model is: comprise display screen; the direct viewing type instrument; manual operation control knob and switch; isolation switch and frame universal isolating switch; current transformer group and voltage transformer (VT) group; the integrated control protective unit of microcomputer type; the thyristor excitation output module; the thyristor speed control output module; the integrated control protective unit of described microcomputer type comprises the host CPU module; switching input module; switching value output module; direct current temperature sampling module; the AC sampling protection module; the excitation speed-regulating control module; described display screen; switch input quantity module; switch output quantity module; direct current temperature sampling module; the AC sampling protection module; the excitation speed-regulating control module links to each other with the host CPU module respectively; described switching input module receives from manual operation button and switch; the switching signal of isolation switch and frame universal isolating switch; the opening and closing of described switching value output module output switching signal control subsidiary engine equipment; direct current temperature sampling module gathers from DC analogue quantity signals such as the temperature signal of unit bearing and winding or water levels; current transformer group and voltage transformer (VT) group are electric current; voltage signal is transported to the direct viewing type instrument; the AC sampling protection module; the excitation speed-regulating control module respectively with the thyristor speed control output module; the thyristor excitation output module links to each other, and described manual operation button and switch control signal are connected to subsidiary engine equipment.
A kind of low pressure unit generation control protection system; comprise display screen, direct viewing type instrument, manual operation control knob and switch, isolation switch and frame universal isolating switch, current transformer group and voltage transformer (VT) group, the integrated control protective unit of microcomputer type, thyristor excitation output module, it is characterized in that: the integrated control protective unit of described microcomputer type comprises host CPU module, switching input module, switching value output module, direct current temperature sampling module, AC sampling protection module, excitation speed-regulating control module.
Be total to configurable 7 modules in configurable 2 of the described switching input module, the integrated control protective unit of described microcomputer type.
The beneficial effects of the utility model are: low pressure unit generation control protection system is being guaranteed under the reliable prerequisite; with function system integration realizations such as measurement, control, protection, speed governing, excitations; adopt high-performance microprocessor as core, multi-CPU architecture, Modular function design; complete realization generator protection, excitation control, rotating speed observing and controlling, temperature patrol inspection, electric quantity acquisition, non electrical quantity collection, the control same period; changed traditional tactic pattern; greatly improve the overall performance of product, had good Electro Magnetic Compatibility.System takes into full account the applicability of small hydropower station when realizing, consider local control function, automatically-monitored maintenance and operational management function, remote monitoring management and running function as a whole, automatic operation is provided and manually moves 2 kinds of different modes, the ratio of performance to price is high, has larger application value in slight water power field.
Description of drawings
Fig. 1 is structured flowchart of the present utility model.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples.
Embodiment scheme 1:
Low pressure unit generation control protection system; comprise display screen; the direct viewing type instrument; manual operation control knob and switch; isolation switch and frame universal isolating switch; current transformer group and voltage transformer (VT) group; the integrated control protective unit of microcomputer type; the thyristor excitation output module; the thyristor speed control output module; the integrated control protective unit of described microcomputer type comprises the host CPU module; switching input module; switching value output module; direct current temperature sampling module; the AC sampling protection module; the excitation speed-regulating control module; described display screen; switch input quantity module; switch output quantity module; direct current temperature sampling module; the AC sampling protection module; the excitation speed-regulating control module links to each other with the host CPU module respectively; described switching input module receives from manual operation button and switch; the switching signal of isolation switch and frame universal isolating switch; the opening and closing of described switching value output module output switching signal control subsidiary engine equipment; direct current temperature sampling module gathers from DC analogue quantity signals such as the temperature signal of unit bearing and winding or water levels; current transformer group and voltage transformer (VT) group are electric current; voltage signal is transported to the direct viewing type instrument; the AC sampling protection module; the excitation speed-regulating control module respectively with the thyristor speed control output module; the thyristor excitation output module links to each other, and described manual operation button and switch control signal are connected to subsidiary engine equipment.
But the integrated control protective unit of microcomputer type provides the online programming function, can finish at the scene according to the difference of power station field condition editor and the modification of unit startup-shutdown control flow.Device can be implemented in remote control situation or the touch-screen manual operation situation, finishes the automatic startup-shutdown sequential control function of unit behind the input mandate password with a key instruction.
Display screen shows and action pane as man-machine interface, the analog data such as three-phase voltage, three-phase current, frequency, active power, reactive power, power factor, genset temperature that can show unit, the status information that also can show unit equipment is such as the unlatching of circuit breaker position signal, current indicator signal, gate or valve or shutdown signal etc.The display screen while is as operation maintenance personnel's control operation interface.The startup-shutdown operation of unit, protection definite value query and maintenance, setting parameter etc. can be finished after password is authorized in the display screen input.
Inner each intermodule of the integrated control protective unit of microcomputer type adopts dual CAN bus to realize the exchange of data and information; each submodule is uploaded control procedure information and related data by the CAN fieldbus to the host CPU module, and display screen, background monitoring computing machine can issue by the host CPU module parameter and relevant set-point of setting to each submodule.
The host CPU module is as the switching control center of internal and external information, realization is interconnected with communicating by letter of display screen, background monitoring computing machine, the information such as setup parameter are forwarded to inner each module, simultaneously the measurement data of each module, warning message, control action information etc. are uploaded to exterior display screen, background monitoring Computer display.
Switching input module is finished the collection of 32 switching value signals, band sequence of events recording function.Device is outside to be adopted without source contact, and the 24V signal power source need be provided separately.
Switching value output module can provide No. 16 relays to leave, and exports without the source contact mode, realizes sequential control function in the unit startup-shutdown production run.
Direct current temperature sampling module, finish 8 road non-electric charge quantity signallings, 6 road RTD Temperature Quantity signals wherein, can gather Pt100 or Cu50 thermal resistance three-wire system signal access way, other 2 the tunnel can be used for gathering the DC analogue quantity signal, signal source 4-20mA, 0-5V are optional, and collection capacity comprises the signals such as water level, pressure, flow.
The AC sampling protection module is realized the relay protection functions such as syllogic current protection, overload protection, overvoltage protection, under-voltage protection, overspeed protection, carrier current protection, underfrequency protection for the low pressure unit design.According to the difference of generator capacity, also can select to increase, dispose corresponding protection requirement.Modular design gathers 3 drive test amount electric currents, 3 road protective currents, 3 road generator voltages, 1 road system voltage signal, and the defencive function that can satisfy 400V low pressure unit is required.Unit active power, reactive power, power factor obtain by calculating, and all information can send the host CPU module to by the high-speed field bus data channel, finally also can directly directly pass to display screen with digital communication mode and show.In addition; the AC sampling protection module is also finished simultaneous interconnecting adjustment control function, by installing inner CAN high-speed field bus net and other module exchange messages, cooperates the adjusting and the control that realize unit voltage, frequency; exempt a large amount of hard contact wiring in traditional power station, real-time is strengthened.Simultaneous interconnecting adopts optimal algorithm that the combined floodgate phase angle difference is predicted, frequency adjustment, voltage adjustment order can realize in intercommunication fully, the raising precision same period and speed.
The excitation speed-regulating control module can be finished excitation control, 2 kinds of functions of speed regulating control, wherein excitation control function cooperates the adjusting that realizes excitation with the thyristor excitation output module, comprise increasing and encourage, subtract and encourage, finish the adjustment of the front unit voltage that is incorporated into the power networks, the adjustment of the rear unit reactive power that is incorporated into the power networks.And speed-regulating function can be used for the generating unit speed measurement, and rotating speed measured value and rotating speed warning information directly directly are sent to the host CPU module by CAN field bus communication net, no longer links to each other by the hard contact mode of cable as traditional mode.The excitation speed-regulating control module can be finished the frequency difference of measuring unit and system's (electrical network) simultaneously; the regulation and control of realization machine class frequency; have start, shut down, be incorporated into the power networks and the function such as increasing and decreasing load, cooperate the harmonics sampling module to finish the unit simultaneous interconnecting and adjust function.In addition, speed-regulating function can also cooperate with the thyristor speed control output module, can realize adopting the low pressure generating unit speed regulatory function of manual and electric double-purpose motor speed adjusting, comprise speedup, deceleration, finish the adjustment of the front machine class frequency that is incorporated into the power networks, the adjustment of the rear unit active power that is incorporated into the power networks.When the low voltage generator group adopted motor speed adjusting, the simultaneously supporting rotating that is designed with 2 A.C. contactor control motors of system utilized the thyristor speed control output module to finish the frequency control of motor, reaches the purpose of controller rotating speed.
Direct viewing type instrument one cover (totally 5 digital display instruments), wherein voltage table, frequency meter are each 2, add 1 synchronous meter; Observe when synchronous meter operates as the manual simultaneous interconnecting in power station and use.
Manual operation control knob and switch one cover, for the manual operation of finishing unit, the reservation operations function during as unit emergency stop, maintenance.
Isolation switch and frame universal isolating switch one cover are as an electrical equipment composition of 400V low pressure unit; Adopt electronic energy pre-storage formula frame universal isolating switch, fully satisfy the needs of low pressure unit simultaneous interconnecting operation.
Current transformer group and voltage transformer (VT) group one cover; wherein the current transformer group is used for gathering the current signal of 400V low pressure unit; voltage transformer (VT) then gathers respectively the voltage signal from 400V low-voltage bus bar, low pressure unit, and the output signal of above-mentioned two groups of mutual inductors is connected to respectively direct viewing type instrument, the AC sampling protection module of system.
Embodiment scheme 2:
Low pressure unit generation control protection system; comprise display screen; the direct viewing type instrument; manual operation control knob and switch; isolation switch and frame universal isolating switch; current transformer group and voltage transformer (VT) group; the integrated control protective unit of microcomputer type; the thyristor excitation output module; the integrated control protective unit of described microcomputer type comprises the host CPU module; switching input module; switching value output module; direct current temperature sampling module; the AC sampling protection module; the excitation speed-regulating control module; except switching input module has 2 each 1 of all the other module, totally 7 modules in the device.
With scheme 1 difference be; the 1st point: no longer dispose the thyristor speed control output module; mainly be applicable to adopt the low pressure unit of electrohydaulic speed governor; the integrated control protective unit of microcomputer type needs by the outside speed regulator speedup of the relay output contact control of its inner switching value output module, slowing down and carrying out startup-shutdown operates, and needs to adopt common hard contact, cable contact method.Need not dispose 2 A.C. contactors of control motor positive and inverse yet.
With scheme 1 difference be the 2nd point: the many 1 switch input quantity modules of configuration module in the integrated control protective unit of microcomputer type (totally 2, device internal module number reaches 7).Adopt 2 switching input modules, can gather nearly 64 switching value signal, be applicable to the power station field signal acquisition more occasion of counting.
Claims (2)
1. a low pressure unit generation is controlled protection system; comprise display screen; the direct viewing type instrument; manual operation control knob and switch; isolation switch and frame universal isolating switch; current transformer group and voltage transformer (VT) group; it is characterized in that: also comprise the integrated control protective unit of microcomputer type; the thyristor excitation output module; the thyristor speed control output module; the integrated control protective unit of described microcomputer type comprises the host CPU module; switching input module; switching value output module; direct current temperature sampling module; the AC sampling protection module; the excitation speed-regulating control module; described display screen; switch input quantity module; switch output quantity module; direct current temperature sampling module; the AC sampling protection module; the excitation speed-regulating control module links to each other with the host CPU module respectively; described switching input module receives from manual operation button and switch; the switching signal of isolation switch and frame universal isolating switch; the opening and closing of described switching value output module output switching signal control subsidiary engine equipment; direct current temperature sampling module gathers from DC analogue quantity signals such as the temperature signal of unit bearing and winding or water levels; current transformer group and voltage transformer (VT) group are electric current; voltage signal is transported to the direct viewing type instrument; the AC sampling protection module; the excitation speed-regulating control module respectively with the thyristor speed control output module; the thyristor excitation output module links to each other, and described manual operation button and switch control signal are connected to subsidiary engine equipment.
2. a low pressure unit generation is controlled protection system; comprise display screen, direct viewing type instrument, manual operation control knob and switch, isolation switch and frame universal isolating switch, current transformer group and voltage transformer (VT) group, the integrated control protective unit of microcomputer type, thyristor excitation output module, it is characterized in that: the integrated control protective unit of described microcomputer type comprises host CPU module, switching input module, switching value output module, direct current temperature sampling module, AC sampling protection module, excitation speed-regulating control module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012205115614U CN202795030U (en) | 2012-10-08 | 2012-10-08 | Control and protection system of low voltage generator set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012205115614U CN202795030U (en) | 2012-10-08 | 2012-10-08 | Control and protection system of low voltage generator set |
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| Publication Number | Publication Date |
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| CN202795030U true CN202795030U (en) | 2013-03-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012205115614U Expired - Lifetime CN202795030U (en) | 2012-10-08 | 2012-10-08 | Control and protection system of low voltage generator set |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103607043A (en) * | 2013-10-11 | 2014-02-26 | 广东鸿源能源技术有限公司 | Hydropower station intelligent monitoring system |
| CN105720873A (en) * | 2016-03-21 | 2016-06-29 | 戴树梅 | PIC single chip microcomputer-based small synchronous generator excitation controller |
| CN109991905A (en) * | 2019-04-22 | 2019-07-09 | 武汉悟控科技有限公司 | A kind of integrated small hydropower station automatic control system |
-
2012
- 2012-10-08 CN CN2012205115614U patent/CN202795030U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103607043A (en) * | 2013-10-11 | 2014-02-26 | 广东鸿源能源技术有限公司 | Hydropower station intelligent monitoring system |
| CN105720873A (en) * | 2016-03-21 | 2016-06-29 | 戴树梅 | PIC single chip microcomputer-based small synchronous generator excitation controller |
| CN109991905A (en) * | 2019-04-22 | 2019-07-09 | 武汉悟控科技有限公司 | A kind of integrated small hydropower station automatic control system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130313 |