CN104578819A - Underwater exploration intermediate-frequency deck power source and electromagnetic exploration system - Google Patents
Underwater exploration intermediate-frequency deck power source and electromagnetic exploration system Download PDFInfo
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- CN104578819A CN104578819A CN201410802530.8A CN201410802530A CN104578819A CN 104578819 A CN104578819 A CN 104578819A CN 201410802530 A CN201410802530 A CN 201410802530A CN 104578819 A CN104578819 A CN 104578819A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
- H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
- H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
- H02M5/453—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
- H02M5/458—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/12—Arrangements for reducing harmonics from ac input or output
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Abstract
The invention discloses an underwater exploration intermediate-frequency deck power source and an electromagnetic exploration system. The underwater exploration intermediate-frequency deck power source comprises a rectifying and filtering unit, a power inversion unit, an SPWM wave synthesis unit, a boosting filtering unit, a main control unit, a GPS unit and a water circulation heat dissipation unit, wherein the power inversion unit is connected to the rectifying and filtering unit and the SPWM wave synthesis unit; the main control unit comprises a main control chip used for setting zero phases for modulating waves and changing frequency voltage of the modulating waves according to a GPS pulse per second, a sine wave generating circuit used for generating modulating waves according to the GPS pulse per second and a frequency circuit, and a triangular wave generating circuit used for generating carrier waves according to the frequency circuit; the SPWM wave synthesis unit is used for outputting SPWM waves according to the modulating waves and the carrier waves; the power inversion unit is used for controlling on-off of power devices according to the SPWM waves; the boosting filtering unit is connected to the power inversion unit and the output end of the power inversion unit is used as a power source output end; the water circulation heat dissipation unit is used for heat dissipation of the power inversion unit.
Description
Technical field
The present invention relates to deep water technical field of sea exploration, particularly relate to a kind of underwater exploration intermediate frequency deck power supply and electromagnetic prospecting system.
Background technology
In recent years, along with greatly developing of offshore oil mineral resources exploration, various Electromagnetism of Earthquake exploring equipment have also been obtained broad development, but deep water seafari development is relatively slow, is mainly subject to the restriction of exploring equipment.In order to break this bottleneck, have developed the electromagnetic survey of deep water controllable source.
During the exploration of deep water controllable source, emission source is the high-power under water operation (60KW) of 3 to 4 kms.The deck power of current use is very little (within 50KW), inversion under water can not produce big current, voltage is lower (below 2800V) also, service cable loss is large, output frequency is 50Hz or 60Hz, make the step-down transformer volume of inversion under water large, difficulty of processing is large, and cost is large; And the radiating effect of deck power supply is poor.
If be that underwater emission machine is powered with common 380VAC, the 50Hz on ship, on the cable of 5 kms, the power of loss will be far longer than the power of subsea inverter, and very high to the requirement of service cable, and resistance can not be too large.Fixed voltage is fed in subsea inverter, makes other equipment de-sign difficulty of processing under water very large.
Summary of the invention
The invention provides a kind of underwater exploration intermediate frequency deck power supply and electromagnetic prospecting system, at least to solve the problem that power supply power is little, voltage is low, frequency is low and cable loss is large of controllable source under water in prior art.
According to an aspect of the present invention, provide a kind of underwater exploration intermediate frequency deck power supply, described intermediate frequency deck power supply comprises: rectification filtering unit, power inverting unit, Using Sinusoidal Pulse Width Modulation (Sinusoidal Pulse WidthModulation, referred to as SPWM) ripple synthesis unit, boosting filter unit, main control unit, global positioning system (Global Positioning System, referred to as GPS) unit and water circulation heat-sink unit; Wherein, the input of described rectification filtering unit is connected to the output of generator on ship; The input of described power inverting unit is connected to the output of described rectification filtering unit and the output of described SPWM ripple synthesis unit respectively, the input of described SPWM ripple synthesis unit is connected to described main control unit, and described main control unit is connected to described GPS unit; Described main control unit comprises: main control chip, frequency circuit, sinusoidal wave generation circuit and triangular wave generating circuit; Described main control chip, is connected to described GPS unit and described frequency circuit, and for the zero phase of the given modulating wave of GPS pulse per second (PPS) produced according to described GPS unit, and the frequency and voltage amplitude changing modulating wave is with control SPWM wave frequency and width; Described sinusoidal wave generation circuit, be connected to described frequency circuit, for generating the sine wave of zero phase first preset frequency synchronous with described GPS pulse per second (PPS) according to described GPS pulse per second (PPS) and described frequency circuit, as modulating wave, wherein, 1 can be eliminated by described first preset frequency; Described triangular wave generating circuit, is connected to described frequency circuit, and the second frequency signal for sending according to described frequency circuit generates the isosceles triangle wave of the second preset frequency, as carrier wave; Described SPWM ripple synthesis unit is used for synthesizing according to described modulating wave and described carrier wave and exporting described SPWM ripple; Described power inverting unit is used for the break-make controlling its power device according to described SPWM ripple, to export the sinusoidal signal of predeterminated frequency and predeterminated voltage; The input of described boosting filter unit is connected to the output of described power inverting unit, and the output of described boosting filter unit is as the output of described intermediate frequency deck power supply; Described water circulation heat-sink unit is connected with described power inverting unit, for being described power inverting unit heat radiation.
In one embodiment, described SPWM ripple synthesis unit comprises: SPWM ripple combiner circuit, drive waveform output circuit and feedback control circuit; Wherein, described SPWM ripple combiner circuit, is connected to described sinusoidal wave generation circuit and described triangular wave generating circuit respectively, for more described modulating wave and described carrier wave, the pulse train of phase voltage is exported, as described SPWM ripple according to the intersection point determination inverter bridge of described modulating wave and described carrier wave; Described drive waveform output circuit, is connected to described SPWM ripple combiner circuit, for exporting described SPWM ripple; Described feedback control circuit, is connected to the output of described intermediate frequency deck power supply and described main control chip, for regulating described modulating wave in real time according to the output voltage of described intermediate frequency deck power supply.
In one embodiment, described deck power supply also comprises: protective circuit, and the input of described protective circuit is connected to the output of described power inverting unit, and the output of described protective circuit is connected to the input of described power inverting unit.
In one embodiment, described water circulation heat-sink unit comprises: tank, circulating water pipe, circulating pump, heating panel and fan; Wherein, described tank is built with cooling fluid, and described inboard wall of cistern is provided with transducer, and described transducer is for detecting the water level of cooling fluid in described tank; Described circulating water pipe is connected with described tank; Described circulating pump, is arranged on described circulating water pipe, circulates in described circulating water pipe for controlling described cooling fluid; Described power inverting unit is arranged on described heating panel, is arranged on the components and parts S-type layout of the circulating water pipe on described heating panel around described power inverting unit; Be positioned at the S-type layout of circulating water pipe of described position of fan, form radiator, described fan is facing to described radiator blowing.
In one embodiment, described intermediate frequency deck power supply also comprises: remote controllers, be connected to described main control chip, for exchanging signal with described main control chip, the startup of intermediate frequency deck power supply described in the running parameter of intermediate frequency deck power supply and Long-distance Control and closedown according to described signal setting; Whether also for receiving the current operating parameters of described intermediate frequency deck power supply that described main control chip sends, and it is normal to detect the state of described intermediate frequency deck power supply according to the running parameter preset and described current operating parameters.
In one embodiment, described power inverting unit comprises: at least one H bridge insulated gate bipolar transistor (Insulated Gate Bipolar Transistor, referred to as IGBT) and at least one full-wave rectifier tube.
According to another aspect of the present invention, provide a kind of electromagnetic prospecting system, comprise: intermediate frequency deck power supply, cable and controllable source under water, wherein, described intermediate frequency deck power supply is the underwater exploration intermediate frequency deck power supply described in above-mentioned any embodiment, described intermediate frequency deck power supply is arranged aboard ship, is connected, for described controllable source is under water powered by described cable with described controllable source under water.
By underwater exploration intermediate frequency deck power supply of the present invention and electromagnetic prospecting system, GPS pulse per second (PPS) is utilized to carry out Phase synchronization and utilize SPWM technology, obtain the sinusoidal signal of predeterminated frequency (0 ~ 400Hz) and predeterminated voltage (0 ~ 400V), then through boosting, the power supply obtaining high pressure intermediate frequency exports.Intermediate frequency power supply system makes underwater emission machine weight, volume all significantly reduces.High voltage supply makes the loss on service cable greatly reduce, and therefore, the voltage arriving high-power deep water controllable source raises to some extent, and then can produce big current (as 1000A), realizes great-power electromagnetic exploration operation smoothly.In addition, utilize water circulation to dispel the heat for the power inverting unit producing heat more dispels the heat, good heat dissipation effect, inversion efficiency is high, and then improves the operating efficiency of power supply; And heat-sink unit volume is little, and then the volume of whole intermediate frequency deck power supply is also less.Therefore, adopt this intermediate frequency deck power supply, make controllable source transmitter miniaturization under water become possibility, and the voltage of power supply, frequency can be arranged arbitrarily in scope, this power supply can connect various inversion emission system, and the flexibility of use is very strong.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, and form a application's part, schematic description and description of the present invention, for explaining the present invention, does not form limitation of the invention.In the accompanying drawings:
Fig. 1 is the structural representation of the underwater exploration intermediate frequency deck power supply of one embodiment of the invention;
Fig. 2 is the structural representation of the underwater exploration intermediate frequency deck power supply of another embodiment of the present invention;
Fig. 3 is the waveform schematic diagram of the SPWM technology of the embodiment of the present invention;
Fig. 4 is the structural representation of the water circulation heat-sink unit of the embodiment of the present invention;
Fig. 5 is the structural representation of the underwater exploration intermediate frequency deck power supply of further embodiment of this invention;
Fig. 6 is the schematic diagram of the drive waveform output circuit of the embodiment of the present invention;
Fig. 7 is the circuit diagram of the power inverting unit of the embodiment of the present invention;
Fig. 8 is the circuit diagram of filtering part in the boosting filter unit of the embodiment of the present invention;
Fig. 9 is the circuit diagram of the intermediate frequency deck power supply of the embodiment of the present invention;
Figure 10 is the structural representation of the electromagnetic prospecting system of the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on embodiments of the invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to protection scope of the present invention.
The problems such as the deck power supply power for current deep water controllable source electromagnetic survey emission source is little, voltage is low, frequency is low, radiating effect is poor, embodiments provide a kind of underwater exploration intermediate frequency deck power supply (AC-DC-AC), be applicable to the power supply of high-power deep water controllable source, for the realization of deep water controllable source great-power electromagnetic exploration lays a solid foundation.
Fig. 1 is the structural representation of the underwater exploration intermediate frequency deck power supply of the embodiment of the present invention, as shown in Figure 1, intermediate frequency deck power supply comprises: rectification filtering unit 10, power inverting unit 20, SPWM ripple synthesis unit 30, boosting filter unit 40, main control unit 50, GPS unit 60 and water circulation heat-sink unit 70.Below its structure is described in detail.
The input of rectification filtering unit 10 is connected to the output of generator 11 on ship; The input of power inverting unit 20 is connected to the output of rectification filtering unit 10 and the output of SPWM ripple synthesis unit 30 respectively, and the input of SPWM ripple synthesis unit 30 is connected to main control unit 50, and main control unit 50 is connected to GPS unit 60; The input of boosting filter unit 40 is connected to the output of power inverting unit 20, and the output of boosting filter unit 40 is as the output of intermediate frequency deck power supply; Water circulation heat-sink unit 70 is connected with power inverting unit 20.
Rectification filtering unit 10 is mainly used in the 380V exported generator on ship 11
aCor 220V
aCthe signal of (frequency is 50Hz or 60Hz) carries out rectifying and wave-filtering, and AC signal is converted to direct current signal, and filtering harmonic wave, in order to avoid affect the electricity consumption of other equipment on ship.
Main control unit 50 comprises: main control chip 51 (can be CPU), frequency circuit 52, sinusoidal wave generation circuit 53 and triangular wave generating circuit 54; Wherein, main control chip 51, is connected to GPS unit 60 and frequency circuit 52, and for the zero phase of the given modulating wave of GPS pulse per second (PPS) produced according to GPS unit 60, and the frequency and voltage amplitude changing modulating wave is with control SPWM wave frequency and width; Sinusoidal wave generation circuit 53, be connected to frequency circuit 52, first frequency signal for sending according to GPS pulse per second (PPS) and frequency circuit 52 generates the sine wave of zero phase first preset frequency synchronous with GPS pulse per second (PPS), as modulating wave, wherein, 1 can be eliminated by the first preset frequency that (namely the cycle is integer or finite decimal, such as, first preset frequency is 400Hz, and 1 can be eliminated by 400, and the cycle obtained is 2.5ms); Triangular wave generating circuit 54, is connected to frequency circuit 52, and the second frequency signal for sending according to frequency circuit 52 generates the isosceles triangle wave of the second preset frequency, as carrier wave.Change modulation wave frequency and amplitude, just can change the SPWM wave frequency and width that are obtained by SPWM technology, and then control frequency and the amplitude of the sinusoidal signal that power inverting unit 20 exports, namely obtain the sinusoidal signal of preset frequency and voltage.
SPWM ripple synthesis unit 30, is connected to sinusoidal wave generation circuit 53 and triangular wave generating circuit 54, for synthesizing according to modulating wave and carrier wave and exporting SPWM ripple.
Power inverting unit 20 for controlling the break-make of its power device according to SPWM ripple, to export the sinusoidal signal of predeterminated frequency and predeterminated voltage.Herein, predeterminated frequency is intermediate frequency, and the frequency of general intermediate frequency power supply is 300Hz ~ 10kHz, considers controllable source transmitter volume of transformer and practical situations under water, can be set as 400Hz in the present embodiment, and predeterminated voltage is 400V.Power inverting unit 20 can comprise: at least one H bridge IGBT and at least one full-wave rectifier tube, namely power device is H bridge IGBT and full-wave rectifier tube.
Water circulation heat-sink unit 70 is for dispelling the heat for power inverting unit 20.
Boosting filter unit 40 is mainly used in boosting and filtering harmonic wave to the signal that inversion obtains, and such as, by step-up transformer, voltage is raised to 10 times, obtains the high pressure of 4000V, power to realize medium-frequency high-voltage.What inversion exported later is fundamental frequency is the sine wave of 400HZ, must carry out filtering, and because the harmonic energy of this waveform is very strong, simple inductance capacitance is difficult to filter, and powerful inclined sense transformer and electric capacity can be adopted to carry out filtering.
Pass through the above embodiment of the present invention, GPS pulse per second (PPS) is utilized to carry out Phase synchronization and utilize SPWM technology, obtain the sinusoidal signal of predeterminated frequency (0 ~ 400Hz) and predeterminated voltage (0 ~ 400V), then through boosting, the power supply obtaining high pressure intermediate frequency exports.Intermediate frequency power supply system makes underwater emission machine weight, volume all significantly reduces.High voltage supply makes the loss on service cable greatly reduce, and therefore, the voltage arriving high-power deep water controllable source raises to some extent, and then can produce big current (as 1000A is even larger), realizes great-power electromagnetic exploration operation smoothly.In addition, utilize water circulation to dispel the heat for the power inverting unit producing heat more dispels the heat, good heat dissipation effect, inversion efficiency is high, and then improves the operating efficiency of power supply; And heat-sink unit volume is little, and then the volume of whole intermediate frequency deck power supply is also less.Therefore, adopt this intermediate frequency deck power supply, make controllable source transmitter miniaturization under water become possibility, and the voltage of power supply, frequency can be arranged arbitrarily in scope, this power supply can connect various inversion emission system, and the flexibility of use is very strong.
Concrete, the output voltage of intermediate frequency deck power supply is higher, such as, 4000V can be reached, because the working power of controllable source transmitter is under water generally 60kW, arrive in the voltage ratio prior art of transmitter large, then electric current just reduces, therefore the corresponding reduction of loss on cable (being about 4 to 5 kms), thus also reduce requirement and the cost of cable.The output frequency of intermediate frequency deck power supply is designed to intermediate frequency, such as, 400Hz can be reached, because the transformer coil number of turn and frequency are inversely proportional to, large in frequency ratio prior art, therefore, the core section of controllable source transmitter transformer is long-pending less under water, volume of transformer is less, and then the volume weight of the whole transmitter of controllable source is under water all less, is beneficial to and drags operation under water.The power of the intermediate frequency deck power supply that actual measurement obtains reaches 200kW, then intermediate frequency deck electric power outputting current is 50A.Based on the parameter of above-mentioned intermediate frequency deck power supply, the electric current of 4000 meters of controllable source transmitters under water can reach 1000A, and (arrival transmitter voltage is 50V, and resistance is 50m Ω.If power with 380V or 220V, then through a large amount of loss of cable, the voltage arriving transmitter can not reach 50V), even more big current.As can be seen here, relative to prior art, the intermediate frequency deck power supply of the embodiment of the present invention can realize a powerful frequency conversion (50Hz is become 0 ~ 400Hz), transformation (380V or 220V is become 1000 ~ 4000V).The output voltage of intermediate frequency deck power supply and frequency can be arranged arbitrarily in the interval of its correspondence.
It is 0 ~ 400V that 380V exchanges the output voltage range of input after commutation inversion.In order to improve the reliability of system, reducing costs, amplifying in final stage.Amplify if exchanged in prime, system cost can improve greatly, and reliability also can reduce.
380VAC or 220VAC (50Hz or the 60Hz) power supply of generator on ship is exported after rectifying and wave-filtering, carries out inversion (passing through Sine Pulse Width Modulation).SPWM technology utilizes the conducting of power device, with shutoff, direct voltage is become the sequence of voltage pulses that amplitude is equal and width changes by sinusoidal rule, and carry out variable voltage variable frequency by control impuls width and cycle, realize 0 ~ 400V voltage, 400Hz frequency, then can realize the high voltage output of 0 ~ 4000V, 400Hz by 10 times of transformer boost.
As shown in Figure 2, in one embodiment, SPWM ripple synthesis unit 30 can comprise: SPWM ripple combiner circuit 31, drive waveform output circuit 32 and feedback control circuit 33; Wherein, SPWM ripple combiner circuit 31, be connected to sinusoidal wave generation circuit 53 and triangular wave generating circuit 54 respectively, for comparing modulating wave and carrier wave, the pulse train of phase voltage is exported according to the intersection point determination inverter bridge of modulating wave and carrier wave, as SPWM ripple (specifically can be realized by comparator, sinusoidal wave and carrier wave as two inputs of comparator, then comparator output SPWM ripple); Drive waveform output circuit 32, is connected to SPWM ripple combiner circuit 31, for exporting SPWM ripple; Feedback control circuit 33, is connected to output and the main control chip 51 of intermediate frequency deck power supply, for regulating modulating wave in real time according to the output voltage of intermediate frequency deck power supply.Feedback control circuit 33 can be PID FEEDBACK CONTROL, and main control unit 50 can produce sinusoidal wave according to the feedback regulation of feedback control circuit 33, reach requirement to make waveform.
In the present embodiment, adopt SPWM ripple pulse modulation technology, after system electrification, after main control unit 50 detects GPS pulse per second (PPS), produce sinusoidal modulation wave, and ambipolar isosceles triangle wave (carrier wave).The intersection point of modulating wave and carrier wave determines the pulse train that inverter bridge exports phase voltage, is SPWM ripple, and its cycle is decided by carrier frequency.SPWM ripple is after driving, and the power device controlling power inverting unit 20 (as inverter bridge) replaces break-make by SPWM sequence.Operationally, two inversion devices of same brachium pontis, always by the rule alternately turn-on and turn-off of phase voltage pulse train, produce sinusoidal voltage after high voltage pulse train filtering to inverter bridge.Adopt sinusoidal wave as modulating wave and isosceles triangle wave as carrier wave, modulation result is reliable and stable.The SPWM ripple produced after comparing demodulation controls inversion after overdriving, and produces high-voltage signal.
As shown in Figure 3, A represents modulated triangular wave to waveform schematic diagram, and B represents sinusoidal wave (its frequency can be 400Hz).SPWM wave frequency depends on carrier wave, and its width depends on sinusoidal wave amplitude, can be found out from Fig. 3 by triangular wave and the vertical dotted line that sinusoidal wave intersection point is drawn.By changing the width (maintaining the relative width of each pulse) of SPWM ripple, just can change the voltage amplitude that power supply exports, maintaining power supply incoming frequency constant simultaneously.By changing SPWM wave period (maintaining width ratio constant), just can change the output frequency of power supply, the output voltage of power supply is constant.Main control unit 50 utilizes the zero phase of the continuous given sine wave of GPS pps pulse per second signal, ensures sine wave and synchronous pps pulse per second signal same-phase.
In one embodiment, deck power supply can also comprise: protective circuit, and the input of protective circuit is connected to the output of power inverting unit 20, and the output of protective circuit is connected to the input of power inverting unit 20.Protective circuit is used for providing overcurrent protection, overvoltage protection etc. to power inverting unit 20.
In addition, can also have power supply (5V or 12V) in SPWM ripple synthesis unit 30, be its power supply.
As shown in Figure 4, in one embodiment, water circulation heat-sink unit 70 comprises: tank 71, circulating water pipe 72, circulating pump 73, heating panel 74 and fan 75; Wherein, tank 71 is built with cooling fluid, and tank 71 inwall is provided with transducer 711, and transducer 711 is for detecting the water level of cooling fluid in tank 71; Circulating water pipe 72 is connected with tank 71; Circulating pump 73, is arranged on circulating water pipe 72, circulates for controlled cooling model liquid in circulating water pipe 72; Power inverting unit 20 is arranged on heating panel 74, is arranged on the components and parts S-type layout of the circulating water pipe 72 on heating panel 74 around power inverting unit 20; Be positioned at the S-type layout of circulating water pipe 72 of fan 75 position, form radiator, fan 75 is facing to radiator blowing.
In the present embodiment, due to reverse frequency the break-make frequency of power device (namely in power inverting unit 20) very high (8kHz) of intermediate frequency deck power supply, heating is large, system power dissipation reaches 10kW, if use wind-cooling heat dissipating (volume is very large), be unfavorable for mobility operation.Adopt water circulation to dispel the heat in the present embodiment, volume can reduce more than one times, and then can ensure that the volume of whole intermediate frequency deck power supply can not be excessive.In actual applications, the size of whole heat-sink unit only has 760mm*360mm*600mm, and when power supply is fully loaded with work, temperature is below 50 DEG C.In the present embodiment, transducer 711 detects the water level of cooling fluid in tank 71, if water level is too low, can send alarm, to add cooling fluid.In addition, circulating water pipe 72 on heating panel 74 and the S-type layout in fan 75 place, is more conducive to heat radiation.
In actual applications, on heating panel 74, near components and parts, groove can be set, being positioned on circulating water pipe 72 insert plate of heating panel 74, also this component loops water pipe 72 can be pasted onto on heating panel 74 near components and parts, avoid circulating water pipe 72 to be separated with heating panel 74, affect radiating effect.
As shown in Figure 5, in one embodiment, intermediate frequency deck power supply also comprises: remote controllers 80, is connected to main control chip 51, for exchanging signal with main control chip 51, according to the running parameter of signal setting intermediate frequency deck power supply and the startup of Long-distance Control intermediate frequency deck power supply and closedown; Also for receiving the current operating parameters of the intermediate frequency deck power supply that main control chip 51 sends, and whether normal according to the state of the running parameter preset and current operating parameters detection intermediate frequency deck power supply.
In the present embodiment, consider that electric power output voltage is higher, dangerous, therefore, add remote control function, facilitate the startup closedown of power supply and the monitoring of power supply status.Main control chip 51 in main control unit 50 to be connected with remote controllers 80 by RS485 mouth and to exchange signal.The running parameter wherein arranged can comprise maximum voltage, maximum current etc., and the parameters such as Real-time Obtaining power supply current voltage, electric current, to judge whether power supply is in normal operating condition, so that on-call maintenance, avoid causing danger.
Below provide some simple examples of circuits, but the present invention is not limited to this, as long as the circuit that can realize the functions such as drive waveform output, power inverting, boosting filtering all belongs to protection scope of the present invention.Fig. 6 is the schematic diagram of the drive waveform output circuit of the embodiment of the present invention, Fig. 7 is the circuit diagram of the power inverting unit of the embodiment of the present invention, Fig. 8 is the circuit diagram of filtering part in the boosting filter unit of the embodiment of the present invention, and Fig. 9 is the circuit diagram of the intermediate frequency deck power supply of the embodiment of the present invention.In figure 6, SPWM ripple exports after the driving of the devices such as light-coupled isolation, can control inversion.In the figure 7, in power inverting unit, two inversion devices of same brachium pontis are always according to the rule alternately turn-on and turn-off of phase voltage pulse train, such as, and two devices that in Fig. 7, A point is upper and lower.In fig. 8, adopt powerful inclined sense transformer and electric capacity to carry out filtering to SPWM ripple, can filter effect be ensured.Fig. 9 is a simple circuit diagram, 380V or 220V voltage, through rectifying and wave-filtering, carries out power inverting under SPWM ripple drives, then after filtering with boosting (1:10), reach 1500 ~ 4000V, frequency is 400Hz, thus realizes the output of high pressure intermediate frequency.
The embodiment of the present invention additionally provides a kind of electromagnetic prospecting system, as shown in Figure 10, this electromagnetic prospecting system comprises: intermediate frequency deck power supply 100, cable 200 and controllable source 300 under water, wherein, intermediate frequency deck power supply 100 is the underwater exploration intermediate frequency deck power supplys described in above-mentioned any embodiment, intermediate frequency deck power supply 100 arranges aboard ship, is connected, for controllable source 300 is powered under water with controllable source 300 under water by cable 200.
On ship generator export 380V or 220V three-phase or single-phase alternating current is soft open after, carry out full-bridge inverting through filter rectification, then carry out 10 times of amplifications through filtering and transformer, the sinewave output of 1000 ~ 4000V, 400Hz can be produced.This power supply is powered by the controllable source under water of cable to 4 ~ 5 kms under water, and distortion is less than 3%.Power supply output HIGH voltage, the loss on cable reduces, then can ensure that the voltage arriving controllable source transmitter is under water enough large, to produce big current, carry out high-power underwater operation.
In the description of this specification, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.
Above-described specific embodiment; object of the present invention, technical scheme and beneficial effect are further described; be understood that; the foregoing is only specific embodiments of the invention; the protection range be not intended to limit the present invention; within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. a underwater exploration intermediate frequency deck power supply, is characterized in that, described intermediate frequency deck power supply comprises: rectification filtering unit, power inverting unit, SPWM ripple synthesis unit, boosting filter unit, main control unit, GPS unit and water circulation heat-sink unit;
Wherein, the input of described rectification filtering unit is connected to the output of generator on ship;
The input of described power inverting unit is connected to the output of described rectification filtering unit and the output of described SPWM ripple synthesis unit respectively, the input of described SPWM ripple synthesis unit is connected to described main control unit, and described main control unit is connected to described GPS unit;
Described main control unit comprises: main control chip, frequency circuit, sinusoidal wave generation circuit and triangular wave generating circuit; Described main control chip, is connected to described GPS unit and described frequency circuit, and for the zero phase of the given modulating wave of GPS pulse per second (PPS) produced according to described GPS unit, and the frequency and voltage amplitude changing modulating wave is with control SPWM wave frequency and width; Described sinusoidal wave generation circuit, be connected to described frequency circuit, first frequency signal for sending according to described GPS pulse per second (PPS) and described frequency circuit generates the sine wave of zero phase first preset frequency synchronous with described GPS pulse per second (PPS), as modulating wave, wherein, 1 can be eliminated by described first preset frequency; Described triangular wave generating circuit, is connected to described frequency circuit, and the second frequency signal for sending according to described frequency circuit generates the isosceles triangle wave of the second preset frequency, as carrier wave;
Described SPWM ripple synthesis unit is used for synthesizing according to described modulating wave and described carrier wave and exporting described SPWM ripple;
Described power inverting unit is used for the break-make controlling its power device according to described SPWM ripple, to export the sinusoidal signal of predeterminated frequency and predeterminated voltage;
The input of described boosting filter unit is connected to the output of described power inverting unit, and the output of described boosting filter unit is as the output of described intermediate frequency deck power supply;
Described water circulation heat-sink unit is connected with described power inverting unit, for being described power inverting unit heat radiation.
2. underwater exploration intermediate frequency deck according to claim 1 power supply, is characterized in that, described SPWM ripple synthesis unit comprises: SPWM ripple combiner circuit, drive waveform output circuit and feedback control circuit;
Wherein, described SPWM ripple combiner circuit, is connected to described sinusoidal wave generation circuit and described triangular wave generating circuit respectively, for more described modulating wave and described carrier wave, the pulse train of phase voltage is exported, as described SPWM ripple according to the intersection point determination inverter bridge of described modulating wave and described carrier wave;
Described drive waveform output circuit, is connected to described SPWM ripple combiner circuit, for exporting described SPWM ripple;
Described feedback control circuit, is connected to the output of described intermediate frequency deck power supply and described main control chip, for regulating described modulating wave in real time according to the output voltage of described intermediate frequency deck power supply.
3. underwater exploration intermediate frequency deck according to claim 1 power supply; it is characterized in that; described deck power supply also comprises: protective circuit; the input of described protective circuit is connected to the output of described power inverting unit, and the output of described protective circuit is connected to the input of described power inverting unit.
4. underwater exploration intermediate frequency deck according to claim 1 power supply, it is characterized in that, described water circulation heat-sink unit comprises: tank, circulating water pipe, circulating pump, heating panel and fan;
Wherein, described tank is built with cooling fluid, and described inboard wall of cistern is provided with transducer, and described transducer is for detecting the water level of cooling fluid in described tank;
Described circulating water pipe is connected with described tank;
Described circulating pump, is arranged on described circulating water pipe, circulates in described circulating water pipe for controlling described cooling fluid;
Described power inverting unit is arranged on described heating panel, is arranged on the components and parts S-type layout of the circulating water pipe on described heating panel around described power inverting unit;
Be positioned at the S-type layout of circulating water pipe of described position of fan, form radiator, described fan is facing to described radiator blowing.
5. underwater exploration intermediate frequency deck according to claim 1 power supply, it is characterized in that, described intermediate frequency deck power supply also comprises: remote controllers, be connected to described main control chip, for exchanging signal with described main control chip, the startup of intermediate frequency deck power supply described in the running parameter of intermediate frequency deck power supply and Long-distance Control and closedown according to described signal setting; Whether also for receiving the current operating parameters of described intermediate frequency deck power supply that described main control chip sends, and it is normal to detect the state of described intermediate frequency deck power supply according to the running parameter preset and described current operating parameters.
6. underwater exploration intermediate frequency deck according to any one of claim 1 to 5 power supply, it is characterized in that, described power inverting unit comprises: at least one H bridge insulated gate bipolar transistor IGBT and at least one full-wave rectifier tube.
7. an electromagnetic prospecting system, it is characterized in that, comprise: intermediate frequency deck power supply, cable and controllable source under water, wherein, described intermediate frequency deck power supply is the underwater exploration intermediate frequency deck power supply according to any one of claim 1 to 6, described intermediate frequency deck power supply is arranged aboard ship, is connected, for described controllable source is under water powered by described cable with described controllable source under water.
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| CN201410802530.8A CN104578819B (en) | 2014-12-19 | 2014-12-19 | Underwater exploration intermediate-frequency deck power source and electromagnetic exploration system |
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