CN203205853U - An intelligent controller apparatus used for ship over-current selective protection - Google Patents
An intelligent controller apparatus used for ship over-current selective protection Download PDFInfo
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- CN203205853U CN203205853U CN 201320095226 CN201320095226U CN203205853U CN 203205853 U CN203205853 U CN 203205853U CN 201320095226 CN201320095226 CN 201320095226 CN 201320095226 U CN201320095226 U CN 201320095226U CN 203205853 U CN203205853 U CN 203205853U
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Abstract
The utility model relates to an intelligent controller apparatus used for ship over-current selective protection. The intelligent controller apparatus comprises hardware of a central processor module, a signal acquisition module, a signal conditioning module, a releasing module, a button and display module, and a CAN communication module. The utility model provides a novel intelligent controller based on a DSP. The intelligent controller is used for controlling the breaker groups of a ship low-voltage distribution system and is capable of controlling multiple breakers in order to achieve regioselectivity interlock protection.
Description
Technical field
The utility model relates to a kind of Based Intelligent Control apparatus that is applicable to the selective protection of boats and ships overcurrent, and this Based Intelligent Control apparatus can be realized three sections current protections of tradition, can also the protection of feasible region selective interlock etc., belong to Low Voltage Electrical Apparatus.
Background technology
Ship Electrical Power System is in running, because a variety of causes causes fault to occur, particularly short trouble requires to realize the selective protection of Ship Electrical Power System overcurrent.More be to adopt time principle or electric current principle to realize selective protection in the past, deficiency was separately both arranged.Therefore, the survey region selective interlock is realized Ship Electrical Power System selective protection.Distribution system is divided into a plurality of zones; conspiracy relation in this zone between the basis circuit breaker that sets; simultaneously time principle and electric current principle are taken into account; can reduce fault and involve scope; shorten total fault time, guarantee for Ship Electrical Power System selective protection provides more reliably.
The intellectuality that important prerequisite of feasible region selective interlock is circuit breaker, but also do not have at present a kind of control appliance that can control effectively to circuit breaker group.
Summary of the invention
The purpose of this utility model provides a kind of new intelligent controller based on DSP, is used for the circuit breaker group control of boats and ships low-voltage distribution system.
In order to achieve the above object, the technical solution of the utility model has provided a kind of controller that is applicable to the selective protection of boats and ships overcurrent, it is characterized in that: comprise the central microprocessor unit based on DSP, central microprocessor unit inside carries A/D converting unit or external A/D converting unit, the input of A/D converting unit connects the output that connects respectively voltage modulate circuit and current regulating circuit, the input of voltage modulate circuit and current regulating circuit is connected to the secondary side of external voltage and air core current transformer, the input of central microprocessor unit also connects the output of voltage changer, and the input of voltage changer is connected to the secondary side of saturating current transformer;
The output of central microprocessor unit connects respectively digital trip circuit, keyboard adjust unit, LCD display unit and CAN communication unit; drive magnetic flow convertor by digital trip circuit; so that the circuit breaker action, the output of central microprocessor unit produces a plurality of circuit breaker feasible region selective interlock protections in a certain zone of output control simultaneously.
Preferably, also comprise the simulation trip circuit, the simulation trip circuit provides short-circuit protection for described central microprocessor unit, and simultaneously, this simulation trip circuit also connects described voltage modulate circuit and described current regulating circuit.
Preferably, also comprise the accessory power supply unit, provide accessory power supply by the accessory power supply unit for described simulation trip circuit, described voltage modulate circuit, described current regulating circuit and described voltage changer.
Preferably, described simulation trip circuit comprises window comparator circuit, and window comparator circuit connects pulse width detection circuit and monostable circuit successively, and monostable circuit has the pulse of certain width by output, drives magnetic flow convertor, makes the circuit breaker action.
Preferably, described voltage modulate circuit is comprised of two-stage calculation amplifier, and described current regulating circuit is comprised of the two-stage calculation amplifier of two-way parallel connection, and wherein the multiplication factor of one road two-stage calculation amplifier is greater than the multiplication factor of another road two-stage calculation amplifier.
Preferably, the output of described current regulating circuit connects level and raises circuit, raise the voltage signal that circuit becomes the bipolarity signal of telecommunication positive polarity by level, the output that level is raised the output of circuit and described voltage modulate circuit connects the input of described A/D converting unit by clamp circuit.
Preferably, described CAN communication unit comprise that described central microprocessor unit inside carries or with the CAN controller that is connected on outward on the described central microprocessor unit, the CAN controller connects the CAN bus transceiver by the electrical isolation unit.
The utility model provides a kind of new intelligent controller based on DSP, is used for the circuit breaker group control of boats and ships low-voltage distribution system, and this intelligent controller can be controlled a plurality of circuit breaker feasible region selective interlock protections.
Description of drawings
A kind of circuit block diagram that is applicable to the controller of boats and ships overcurrent selective protection that Fig. 1 provides for the utility model;
Fig. 2 is for to carry out the zone selective interlock fundamental diagram by the utility model;
Fig. 3 is the chain flow chart of regioselectivity.
Embodiment
For the utility model is become apparent, hereby with preferred embodiment, and cooperate accompanying drawing to be described in detail below.
As shown in Figure 1, a kind of controller that is applicable to the selective protection of boats and ships overcurrent that the utility model provides, comprise the central microprocessor unit based on DSP, central microprocessor unit inside carries A/D converting unit or external A/D converting unit, the input of A/D converting unit connects the output that connects respectively external voltage circuit and current regulating circuit, the input of voltage modulate circuit and current regulating circuit is connected to the secondary side of voltage transformer and air core current transformer, the input of central microprocessor unit also connects the output of voltage changer, and the input of voltage changer is connected to the secondary side of saturating current transformer;
The output of central microprocessor unit connects respectively digital trip circuit, keyboard adjust unit, LCD display unit and CAN communication unit; drive magnetic flow convertor by digital trip circuit; so that the circuit breaker action, the output of central microprocessor unit produces a plurality of circuit breaker feasible region selective interlock protections in a certain zone of output control simultaneously.
The utility model also comprises simulation trip circuit and accessory power supply unit.The simulation trip circuit provides short-circuit protection for described central microprocessor unit, and simultaneously, this simulation trip circuit also connects described voltage modulate circuit and described current regulating circuit.Provide accessory power supply by the accessory power supply unit for described simulation trip circuit, described voltage modulate circuit, described current regulating circuit and described voltage changer.
In the present embodiment, central microprocessor unit employing model is the DSP of TMS320F2812.
Voltage modulate circuit and current regulating circuit are basic identical.The voltage modulate circuit is comprised of two stage amplifer.Operational amplifier is selected the high-accuracy operational amplifier of TI company, and it has extremely low offset voltage, bias current and temperature and floats coefficient, employing+5V single power supply, and its inside has 4 road operational amplifiers.Because the current range that current sensor detects is larger, thus the current regulating circuit design two-way two stage amplifer, when detecting electric current hour, by a road larger two stage amplifer of multiplication factor; When the detection electric current is larger, by a road less two stage amplifer of multiplication factor.The two-way two stage amplifer realizes by the sampling resistor of sample rate current input, and concrete dividing potential drop ratio is determined by the rated current of instrument transformer secondary side.By two stage amplifer realize signal filtering, raise and amplify.
That the A/D converting unit adopts is the A/D of TMS320F2812 inside, and its input voltage range is 0-3V, and the input sample current signal is ambipolar sine wave.Therefore, need the design level to raise circuit, so that the bipolarity signal of telecommunication becomes the voltage signal of positive polarity.By one tunnel DC power supply that superposes of the inverting input in the one-level amplifier, the level after can being offset by anti-phase ratio add circuit.Before signal arrives the port of A/D converting unit, also be provided with clamp circuit, realized by two fast recovery diodes.When signal voltage was higher than 3V, one of them diode was switched on, and was input to A/D converting unit port voltage and directly was 3V; When signal voltage was negative voltage, another diode was switched on, and was input to A/D converting unit port voltage and directly was 0V.So just by two diodes A/D converting unit port input voltage is remained on the 0-3V of its permission, guarantee its normal operation.
Trip circuit in the present embodiment comprises digital trip circuit and simulation trip circuit.It is that DSP judges whether fault by protection algorithm and logic that numeral is threaded off, and then by I/O mouth output trip signal, drives magnetic flow convertor such as fault, so that the circuit breaker action.Magnetic flow convertor is inductive operating coil, and it interrupts suddenly the impulse current that produces at electric current, with the overvoltage of power electronic device rated voltage several times occurring being higher than, cause device failure.Therefore, at its next door fly-wheel diode in parallel, adopt simultaneously high speed photo coupling TLP521 to realize electrical isolation.Driving element selects drain current greater than the MOSFET of magnetic flow convertor coil current.
When adopting DSP as the core devices of controller, system is at firm powered on moment, and DSP has an initialization procedure, if at powered on moment short trouble has occured, system can't realize protection so; Also have when especially big short circuit current has occured system's run duration, also can directly realize short-circuit protection by the simulation trip circuit.Therefore, the reliability in order to realize that controller is threaded off is provided with the simulation trip circuit.Its principle is: the sensor sample electric current, without DSP but directly judges whether to be short-circuited by the simulation trip circuit by behind the signal conditioning circuit.
The design simulation trip circuit adopts window comparator circuit to realize.Each phase current adopts two comparators to finish, and when the amplitude of the signal after processing by signal conditioning circuit was in the reference voltage range, then the parallel connection of comparator output was exported a high level Vcc by pull-up resistor; If when having one to exceed reference voltage mutually, then then the comparator output low level exports the pulse with certain width by pulse width detection circuit and monostable circuit, drives magnetic flow convertor, makes the circuit breaker action, and the simulation trip circuit is mainly as backup protection.
The simulation trip circuit that the above designs has the effect of two aspects, the backup protection that especially big short circuit current appears in the short-circuit protection of DSP power-up initializing process and circuit.The short-circuit current value of these two processes is different, therefore needs the different reference data magnitude of voltage of design.
The power module of intelligent controller need to provide+5V ,+3.3V ,+power supplys such as 12V, designed three kinds of supply power modes, power voltage supply, electric current power supply and storage battery power supply.The power module main circuit comprises DC-DC converter, the simulation of three ends pressurizer, power supply chip and the DC-DC converter of diode three-phase bridge rectifier, Boost structure.The DC-DC converter of Boost structure is comprised of power switching device MOSFET, diode VD and storage capacitor C.The conducting duty ratio of+12V voltage regulator output ground pwm signal control MOSFET guarantees output+12V voltage, as the input voltage of three ends simulation Voltage stabilizing module.Output+5V voltage provides power supply for output drives other outer functional modules.
Controller need to arrange by the setting value of keyboard to long delay protection, short delay protection and instantaneous protection.In the situation that controller is wanted as far as possible reduction of cube, adopt keyboard to cooperate with display floater, operate with menu mode.This mode generally if about the design, about, cancel and confirm six keys.Utilize the external interface XINTF of TMS320F2812 to realize interface circuit design with keyboard and LCD.
The CAN bus control system mainly is comprised of CAN controller and CAN bus transceiver two parts, and the DSP TMS320F2812 chip of TI company is embedded with the eCAN controller module, supports the CAN2.0B agreement, therefore only needs design CAN bus transceiver.Consider that controller is in the industrial environment of highfield for a long time, easily produce the sudden change of the interference of electromagnetic noise and external environment condition and produce moment larger electric current and burn the chip of controller, be necessary between controller and CAN transceiver, to set up effective electrical isolation.Isolating chip is selected the digital isolating chip ADuM1201 of ADI company.Two pin CANTX of the eCAN controller module that TMS320F2812 is embedded and CANRX are connected to the CAN bus transceiver by digital isolating chip ADuM1201.In order to improve the reliability of CAN bus communication, in terminal build-out resistor of outlet terminal adding of CAN bus network.
The control method of boats and ships overcurrent selective protection is: voltage, the current signal of a plurality of circuit breakers that gather by voltage, current sensor, carry out anti-aliasing filter and level conversion through signal conditioning circuit, the filtering high fdrequency component is exported two paths of signals simultaneously, one the tunnel is that the voltage that meets A/D change-over circuit input requirements is sent into dsp processor, the processing such as conversion, computing and judgement through signal, as overcurrent occurs, then realize protection by the zone selective interlock mode; Simulation dropout testing circuit is sent on another road, and when especially big short circuit current occurring in the circuit, the simulation trip circuit will directly send trip signal.By keyboard and LCD display module, can adjust and show the parameter of the various protective features of controller.Controller forms communication network by CAN bus module and other intelligent controllers of system and monitoring host computer, and the electric parameter that controller can be detected, fault message etc. are sent to higher level's network, and the while can also the receiving remote parameter configuration, realize " remote measurement; remote control, remote signalling, remote regulating ".
As shown in Figure 2, for carrying out the zone selective interlock fundamental diagram by the utility model, MCCB1 to MCCB6 is respectively circuit breaker among the figure, and circuit breaker MCCB1 to MCCB6 is divided into altogether three grades, and group control device of the present utility model is linked to each other with corresponding circuit breaker respectively.Fig. 3 then is the chain flow chart of regioselectivity.In conjunction with Fig. 2 and Fig. 3; when if fault occurs in the leading-out terminal of circuit breaker MCCB3; i.e. A short circuit among the figure; group's intelligent controller detects short circuit current and surpasses setting threshold; then control circuit breaker MCCB3 instantaneous tripping; the superior circuit breaker sends breaking signal of subordinate's circuit breaker simultaneously, and indication higher level circuit breaker MCCB2, MCCB1 enter set short delay protection.If circuit breaker MCCB3 divides have no progeny, fault is got rid of, and then higher level's circuit breaker MCCB2, MCCB1 withdraw from delay protection and be failure to actuate; If circuit breaker MCCB3 lost efficacy because of the detection failure disjunction or divided the still not excision of short circuit current of having no progeny, then MCCB2 instantaneous disjunction not according to the short time delay of predetermined set indicates higher level's circuit breaker MCCB1 to enter short delay protection simultaneously.So come circuit breaker cooperative cooperating in the control area, the protection of feasible region selective interlock by group's intelligent controller.
B short circuit among Fig. 2 and the processing procedure of C short circuit are referring to Fig. 3.
Claims (7)
1. controller that is applicable to the selective protection of boats and ships overcurrent, it is characterized in that: comprise the central microprocessor unit based on DSP, central microprocessor unit inside carries A/D converting unit or external A/D converting unit, the input of A/D converting unit connects the output that connects respectively voltage modulate circuit and current regulating circuit, the input of voltage modulate circuit and current regulating circuit is connected to the secondary side of voltage transformer and air core current transformer, the input of central microprocessor unit also connects the output of voltage changer, and the input of voltage changer is connected to the secondary side of saturating current transformer;
The output of central microprocessor unit connects respectively digital trip circuit, harmonics detection circuit, keyboard adjust unit, LCD display unit and CAN communication unit; drive magnetic flow convertor by digital trip circuit; so that the circuit breaker action, the output of central microprocessor unit produces a plurality of circuit breaker feasible region selective interlock protections in a certain zone of output control simultaneously.
2. a kind of controller that is applicable to the selective protection of boats and ships overcurrent as claimed in claim 1; it is characterized in that: also comprise the simulation trip circuit; the simulation trip circuit provides short-circuit protection for described central microprocessor unit; simultaneously, this simulation trip circuit also connects described voltage modulate circuit and described current regulating circuit.
3. a kind of controller that is applicable to the selective protection of boats and ships overcurrent as claimed in claim 2; it is characterized in that: also comprise the accessory power supply unit, provide accessory power supply by the accessory power supply unit for described simulation trip circuit, described voltage modulate circuit, described current regulating circuit and described voltage changer.
4. a kind of controller that is applicable to the selective protection of boats and ships overcurrent as claimed in claim 2; it is characterized in that: described simulation trip circuit comprises window comparator circuit; window comparator circuit connects pulse width detection circuit and monostable circuit successively; monostable circuit has the pulse of certain width by output; drive magnetic flow convertor, make the circuit breaker action.
5. a kind of controller that is applicable to the selective protection of boats and ships overcurrent as claimed in claim 1; it is characterized in that: described voltage modulate circuit is comprised of two-stage calculation amplifier; described current regulating circuit is comprised of the two-stage calculation amplifier of two-way parallel connection, and wherein the multiplication factor of one road two-stage calculation amplifier is greater than the multiplication factor of another road two-stage calculation amplifier.
6. a kind of controller that is applicable to the selective protection of boats and ships overcurrent as claimed in claim 1; it is characterized in that: the output of described current regulating circuit connects level and raises circuit; raise the voltage signal that circuit becomes the bipolarity signal of telecommunication positive polarity by level, the output that level is raised the output of circuit and described voltage modulate circuit connects the input of described A/D converting unit by clamp circuit.
7. a kind of controller that is applicable to the selective protection of boats and ships overcurrent as claimed in claim 1; it is characterized in that: described CAN communication unit comprise that described central microprocessor unit inside carries or with the CAN controller that is connected on outward on the described central microprocessor unit, the CAN controller connects the CAN bus transceiver by the electrical isolation unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320095226 CN203205853U (en) | 2013-03-01 | 2013-03-01 | An intelligent controller apparatus used for ship over-current selective protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320095226 CN203205853U (en) | 2013-03-01 | 2013-03-01 | An intelligent controller apparatus used for ship over-current selective protection |
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| Publication Number | Publication Date |
|---|---|
| CN203205853U true CN203205853U (en) | 2013-09-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320095226 Expired - Lifetime CN203205853U (en) | 2013-03-01 | 2013-03-01 | An intelligent controller apparatus used for ship over-current selective protection |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106451765A (en) * | 2016-08-31 | 2017-02-22 | 江苏创能电器有限公司 | Control device of marine molded case circuit breaker |
-
2013
- 2013-03-01 CN CN 201320095226 patent/CN203205853U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106451765A (en) * | 2016-08-31 | 2017-02-22 | 江苏创能电器有限公司 | Control device of marine molded case circuit breaker |
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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: 20130918 |