CN105680703A - Marine-controlled electromagnetic emission device and control method thereof - Google Patents
Marine-controlled electromagnetic emission device and control method thereof Download PDFInfo
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- CN105680703A CN105680703A CN201610150722.4A CN201610150722A CN105680703A CN 105680703 A CN105680703 A CN 105680703A CN 201610150722 A CN201610150722 A CN 201610150722A CN 105680703 A CN105680703 A CN 105680703A
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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
- H02M5/4585—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 having a rectifier with controlled elements
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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
- G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
- G01V3/083—Controlled source electromagnetic [CSEM] surveying
- G01V2003/084—Sources
Abstract
The invention belongs to the technical field of marine electromagnetic surveying, and provides a marine-controlled electromagnetic emission device and a control method thereof. The marine-controlled electromagnetic emission device comprises a shipboard device and a underwater emission source, wherein the shipboard device comprises a shipboard power supply, the shipboard power supply is connected with the underwater emission source and is used for transmitting single-phase power-frequency or intermediate-frequency alternating current more than 1,000 V to the underwater emission source, and the underwater emission source is approximate to the single-phase power-frequency or intermediate-frequency alternating current and is used for converting the single-phase power-frequency or intermediate-frequency alternating current more than 1,000 V to high-power low-frequency and low-voltage alternating current and emitting dual-polarity pulse current with controllable frequency. The underwater emission source is used for power transmission to the single-phase and high-voltage alternating current, thus, the electric transmission efficiency is improved; through the adoption of a combined half-bridge circuit with series input and parallel output, high-voltage direct current is converted to low-voltage direct current, the emission power of the emission source is improved, the electric stress requirement on the device is reduced, the power density of the emission source is enhanced, the device volume is reduced, the construction period is shortened, and the economic cost is saved.
Description
Technical field
The invention belongs to ocean EM exploration technical field, be specifically related to a kind of ocean controllable electromagnetic discharger and control method thereof.
Background technology
Global ocean petroleum resources is very abundant, and in the large oilfield of discovered in recent years, marine field accounts for 60%, but gas and oil in sea technology is also in initial stage. Gas and oil in sea technology mainly has marine geochemical prospecting, marine streamer seismic prospecting, four-dimensional exploration, ocean controllable source electromagnetic method and microbial prospecting technology, gas and oil in sea development technique is inexorable trend to deep-sea technology development, wherein, the good discrimination ability of seabed high resistant thin layer and the exploration cost of relative moderate are increasingly becoming the important method of seabed deep water hydrocarbon resource detection by controllable source electromagnetic method in ocean with it.
Ocean controllable source electromagnetic method adopts the emission source near seabed launch artificial pulse current and be placed in the array electromagnetic receiver reception electromagnetic field signal from subsea strata in seabed. The electromagnetic signal that the artificial pulse current of low frequency produces is to sea water and is full of in the subsea strata of water and propagates, subsea strata resistivity ratio seawater resistivity want height, therefore through subsea strata propagate electromagnetic wave than through sea overwater propagation velocity of electromagnetic wave fast, energy attenuation is fast. When emission source and receptor distance and high resistant reservoir buried depth quite or slightly larger time, the electromagnetic wave energy being reflected back sea-bottom receivers by oily resistive formation will exceed the electromagnetic wave energy of through receptor, simultaneously also above the electromagnetic wave energy through Air Interface reflection and refraction, occupy leading position; If subsea strata does not have high resistant oil-gas Layer, then through subsea strata reflection and refraction electromagnetic wave energy just very faint even without. By the inversion interpretation receiving electromagnetic field signal being obtained the resistivity distribution of subsurface formations, by the substantial connection of resistivity Yu reservoir hydrocarbon saturation, it is directly used in position and the scale of oil-gas Layer in detection subsea strata.
Wherein, ocean controllable electromagnetic emission source is the device producing artificial pulse current in the controllable source electromagnetic method of ocean, and according to its operation principle, the strength and stability of artificial pulse current, credibility and degree of accuracy to exploration result have decisive action. Therefore, designing a kind of ocean controllable electromagnetic emission source exporting artificial pulse current intensity height, strong interference immunity, transient response fast is the basis that ocean controllable source electromagnetic method is implemented.
At present, existing ocean controllable electromagnetic launching technique mainly has two kinds: the first is that emission source adopts less than the single-phase of 400V or three phase mains, owing to input voltage grade is relatively low, if using one to two km cables to transfer electrical energy into close to sub sea location, line loss is higher, the utilization rate of electric energy is relatively low, it is difficult to realize exporting big electric current, high power ocean controllable electromagnetic is launched. In order to solve this problem, when electromagnetic survey is implemented, Electromagnetic Launching source is placed on hull, the output cable of emission source pulled by ship be suspended in marine, to marine transmitting. But this launch scenario, makes exploration context and the degree of depth be restricted, design transmitting power is restricted. The second is that emission source adopts direct current transportation, it is possible to DC form, electric energy is transferred to the emission source close to seabed, it is possible to improve scope and the depth measurement of emission source, but due to the restriction of existing device, designed transmitting power is not high.
Summary of the invention
For the defect that prior art exists, the present invention proposes a kind of ocean controllable electromagnetic discharger and control method thereof, to solve prior art existence due to the restriction of existing device, the problem that emission source transmitting power is not high.
For this purpose it is proposed, first aspect, the present invention provides a kind of ocean controllable electromagnetic discharger, including: device and underwater emission source on ship;
On described ship, device includes ship power source, and described ship power source is connected with described underwater emission source, sends the single phase industrial frequence more than 1000V or medium frequency alternating current to described underwater emission source;
Described underwater emission source receives the described single phase industrial frequence more than 1000V or medium frequency alternating current, and the described single phase industrial frequence more than 1000V or medium frequency alternating current are converted to high power low-frequency low-voltage AC, the bi-directional pulse current that tranmitting frequency is controlled.
Wherein, on described ship, device also includes emission source control station on ship;
On described ship, emission source control station is connected with described underwater emission source, monitors and control the emission state in described underwater emission source in real time.
Wherein, described underwater emission source, including: rectification circuit, combined semi bridge circuit, LC wave filter and radiating circuit;
Described rectification circuit input end is connected with described ship power source, and single phase industrial frequence more than 1000V described in receiving or medium frequency alternating current are converted to high voltage direct current;
The input series connection of each half-bridge circuit in described combined semi bridge circuit, and be connected with described rectification circuit output end; It is connected with described LC filter input end after the outfan parallel connection of each half-bridge circuit in described combined semi bridge circuit; Realize described high voltage direct current and be converted to low-voltage DC;
Described radiating circuit input is connected with described LC filter output; Described radiating circuit obtains high power low-frequency low-voltage AC according to described low-voltage DC, the bi-directional pulse current that tranmitting frequency is controlled.
Wherein, described combined semi bridge circuit includes main module circuit and from modular circuit;
Described main module circuit is any one road half-bridge circuit in described combined semi bridge circuit;
Described from modular circuit be half-bridge circuit except main module circuit described combined semi bridge circuit.
Wherein, described device also includes controller;
Described controller includes a master controller and from controller group, and described master controller is the controller of described main module circuit, described from control group be the described controller from modular circuit;
Described master controller includes Control of Voltage outer shroud and electric current controls internal ring;
The Voltage Feedback input of described master controller is connected with the output-parallel node voltage testing circuit of described combined semi bridge circuit, using the sys node voltage voltage feedback value as the Control of Voltage outer shroud of described master controller;
The current feedback input of described master controller is connected with the output current detection circuit of described main module circuit, and described main module circuit exports the electric current current feedback values as the electric current control internal ring of described master controller; Using the Control of Voltage outer shroud output valve of described master controller as described master controller electric current control internal ring given value of current value;
Described from controller group, respectively include current regulator from controller, described respectively respectively it is connected from the output current detection circuit of modular circuit with described combined semi bridge circuit from the current feedback input of controller, exports the electric current current feedback values as the described current regulator from controller using described from modular circuit;
On described ship, emission source control station is connected with emission source controller by optical fiber, described emission source controller is connected with described master controller by SPI communication, described master controller by emission source control station on the described ship that receives using set-point as the Control of Voltage outer shroud of described master controller of output voltage set in advance and given value of current value, it is achieved the control of the emission source control station emitting voltage to underwater emission source and emission current on described ship;
Described master controller is respectively connected from controller from controller group with described respectively by CAN; And the voltage control loop output valve in described master controller is transferred to described each from controller by CAN, as the given value of current value of described each current regulator from controller.
Wherein, described device also includes pulse-width modulator PWM group;
Described master controller and described be respectively connected with each pulse-width modulator PWM input described pulse-width modulator PWM group respectively from the outfan of controller;
Described each pulse-width modulator PWM outfan is connected with the drive end of each half-bridge circuit in described combined semi bridge circuit, drives the switching tube of each half-bridge circuit in described combined semi bridge circuit.
Wherein, described device also includes emission source controller;
Described emission source controller is connected with described emission source control station by optical fiber, receive the tranmitting frequency set in advance that on described ship, emission source control station sends, the outfan of described emission source controller is connected with the switching tube IGBT drive end of described radiating circuit, it is achieved the emission source control station control to the tranmitting frequency in described underwater emission source on described ship.
Second aspect, the present invention provides the control method of a kind of ocean as above controllable electromagnetic discharger, including:
Described ship power source launches the single phase industrial frequence more than 1000V or midfrequent AC voltage to described underwater emission source;
The described single phase industrial frequence more than 1000V or medium frequency alternating current are carried out rectifying and wave-filtering by described rectification circuit, obtain high voltage direct current;
Described combined semi bridge circuit multiple-channel output, through described combined semi bridge circuit series connection input Parallel opertation, is parallel-connected to described LC wave filter by described high voltage direct current;
Described multiple-channel output is filtered by described LC wave filter, obtains low-voltage DC;
Described radiating circuit according to described low-voltage DC, the bi-directional pulse current that tranmitting frequency is controlled.
Wherein, described method also includes:
Described master controller, described from controller group and described emission source controller respectively by main module circuit output, be transferred to described ship emission source control station from modular circuit output and tranmitting frequency;
On described ship emission source control station by described main module circuit output, described display from modular circuit output and described tranmitting frequency, it is achieved monitor the emission state in described underwater emission source in real time;
On described ship, emission source control station sends described output voltage set in advance, described output electric current set in advance and described tranmitting frequency set in advance to described emission source controller by optical fiber, described emission source controller is connected with described master controller by SPI communication, described output voltage set in advance and described output electric current set in advance are transferred to master controller, it is achieved on described ship, the emitting voltage in described underwater emission source, emission current and tranmitting frequency are controlled by emission source control station.
Wherein, described method also includes:
Switching tube IGBT in described each half-bridge circuit adopts staggered actuation techniques so that the driving pulse phase place of each road half-bridge circuit intermeshes.
A kind of ocean controllable electromagnetic discharger provided by the invention and control method thereof, by adopting single phase industrial frequence or medium-frequency high-voltage power supply to transmit electric energy to underwater emission source, improve the efficiency of transmission of electric energy; And adopt the combined semi bridge circuit of series connection input Parallel opertation, reduce the voltage and current stress of switching tube, reduce the requirements of type selecting of device in circuit, improve switching frequency and the power density of each half-bridge circuit simultaneously, increase the transmitting power of emission source. It addition, the ocean controllable electromagnetic discharger circuit structure of the present invention is simple, it is easy to accomplish, each half-bridge circuit switching frequency is high, decreases the machine volume of electromagnetic launch system; By adopting fabricated structure, shorten construction period, saved Financial cost.
Accompanying drawing explanation
In order to be illustrated more clearly that the present invention or technical scheme of the prior art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, accompanying drawing in the following describes is only embodiments more disclosed by the invention, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawing according to these figure.
The ocean controllable electromagnetic discharger electrical block diagram that Fig. 1 provides for one embodiment of the invention;
The structural representation of the half-bridge circuit that Fig. 2 provides for one embodiment of the invention;
Fig. 3 carries out the structural representation of sharing control for the combined semi bridge circuit that one embodiment of the invention provides;
The structural representation of the ocean controllable electromagnetic discharger that Fig. 4 provides for one embodiment of the invention;
Fig. 5 provides the schematic flow sheet of the control method of ocean controllable electromagnetic discharger for one embodiment of the invention;
The conduction phase figure of the switching tube in the combined semi bridge circuit that Fig. 6 provides for one embodiment of the invention;
Oscillogram in the output electric current of every road half-bridge circuit that Fig. 7 provides for one embodiment of the invention and the output electric current of combined semi bridge circuit.
Description of reference numerals
In figure: 1-1: ship power source 1-2: emission source control station 2 on ship: underwater emission source 3: rectification circuit 4: combined semi bridge circuit 5:LC wave filter 6: radiating circuit 7: master controller 10: emission source controller 4-1: first via half-bridge circuit the 4-2: the second road half-bridge circuit the 4-5: the five road half-bridge circuit 8-1: the first is from controller 8-4: the four from controller the 9-1: the first pulse-width modulator the PWM9-2: the second pulse-width modulator the PWM9-5: the five pulse-width modulator PWM.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in embodiments of the invention is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments. Based on embodiments of the invention, the every other embodiment that those of ordinary skill in the art obtain under not making creative work premise, broadly fall into the scope of protection of the invention.
As it is shown in figure 1, one embodiment of the invention provides a kind of ocean controllable electromagnetic discharger, this device includes: device and underwater emission source 2 on ship; On ship, device includes ship power source 1-1; Ship power source 1-1 is connected with underwater emission source 2, sends the single phase industrial frequence more than 1000V or medium frequency alternating current to underwater emission source 2; Described underwater emission source receives the described single phase industrial frequence more than 1000V or medium frequency alternating current, and the described single phase industrial frequence more than 1000V or medium frequency alternating current are converted to high power low-frequency low-voltage AC, the bi-directional pulse current that tranmitting frequency is controlled.
A kind of ocean controllable electric magnetic source discharger that the present embodiment provides, adopt single-phase high voltage fax transmission of electricity energy, transfer electrical energy into the underwater emission source close to seabed, adopt high voltage power transmission to substantially increase electric energy efficiency of transmission, overcome the restriction of existing device, improve the transmitting power in underwater emission source.
Specifically, the ship power source 1-1 in the present embodiment adopts voltage to be 3000V, frequency is the single phase alternating current power supply of 50Hz. Ship power source 1-1 transfers electrical energy into the underwater emission source close to seabed by cable, when identical output, can reduce the line consumption of transmission line by improving input voltage, reduce the current stress of each device in circuit.
Specifically, in the present embodiment, on ship, device also includes emission source control station 1-2 on ship; On ship, emission source control station 1-2 is connected with underwater emission source 2, the emission state in monitor in real time underwater emission source 2.
It should be noted that, the ocean controllable electromagnetic discharger of the present embodiment is transferred on ship emission source control station 1-2 the real time emission frequency in underwater emission source 2, emitting voltage and emission current by optical-fibre communications, it is achieved that monitor the emission state in underwater emission source 2 in real time.
Specifically, the underwater emission source 2 in the present embodiment includes rectification circuit 3, combined semi bridge circuit 4, LC wave filter 5 and radiating circuit 6; The input of rectification circuit 3 is connected with the outfan of ship power source 1-1, and the single phase industrial frequence more than 1000V received or medium frequency alternating current are converted to high voltage direct current; The input of combined semi bridge circuit 4 Zhong Ge road half-bridge circuit is connected with the outfan of rectification circuit 3; It is connected with LC filter input end after the outfan parallel connection of each half-bridge circuit in combined semi bridge circuit 4; Above-mentioned high voltage direct current is converted to low-voltage DC; The input of radiating circuit 6 is connected with the outfan of LC wave filter 5; Radiating circuit 6 obtains high power low-frequency low-voltage AC according to above-mentioned low-voltage DC, the bi-directional pulse current that tranmitting frequency is controlled.
Specifically, the combined semi bridge circuit 4 in the present embodiment is made up of five road half-bridge circuits, and the input side of combined semi bridge circuit 4 is cascaded structure; The outlet side of combined semi bridge circuit 4 is parallel-connection structure.
It should be noted that the present embodiment does not limit the quantity of the half-bridge circuit in combined semi bridge circuit, those skilled in the art according to practical situation, can be grouped box-like half-bridge circuit by a number of half-bridge circuit.
Specifically, the ocean controllable electromagnetic discharger of the present embodiment, adopt high voltage power transmission, improve electric energy efficiency of transmission, reduce the current stress of the devices such as the switching tube IGBT in each half-bridge circuit in combined semi bridge circuit 4 and commutation diode. simultaneously, by adopting the combined semi bridge circuit 4 of series connection input Parallel opertation, the input voltage of every road half-bridge circuit is reduced to the 1/5 of former input voltage, therefore the voltage stress of the switching tube IGBT in the half-bridge circuit of every road and commutation diode is reduced to original 1/5, and, combined semi bridge circuit 4 is adopted high voltage input terminal and low-voltage output to be isolated, improve the security performance of whole device, standard to parts selection is reduced, increase the selection space of device, substantially increase the switching frequency of half-bridge circuit, improve power density and the energy conversion efficiency in underwater emission source 2, increase the transmitting power in underwater emission source 2. and, by adopting the structure of combined semi bridge circuit 4, reduce the volume of electromagnetic launch system, shorten construction period, save Financial cost.
Specifically, the S in Fig. 11-S10For IGBT switching tube, CS1-CS10For half-bridge derided capacitors, DZ1-DZ10For transformer secondary commutation diode, L and C is filter inductance and the electric capacity of combined semi bridge circuit 4 Parallel opertation.
It should be noted that ocean controllable electromagnetic discharger in the present embodiment launch capacity can also according to practical situation need carry out increase-volume.
Fig. 2 illustrates the structural representation of combined semi bridge circuit 4 Zhong Mei road half-bridge circuit, stable in order to ensure the combined semi bridge circuit 4 in the present embodiment, it is ensured that in the half-bridge circuit of every road, respective devices to keep consistent. In the ideal situation, as long as the device parameters model ensured in the half-bridge circuit of every road is consistent, dutycycle unanimously can ensure that the half-bridge circuit parallel current output current-sharing of combined semi bridge circuit 4 Zhong Ge road. But the circuit of reality nonideality, even if the device model in the half-bridge circuit of every road is identical, its parasitic parameter is also not quite similar, the output electric current of every road half-bridge circuit always there are differences, and input power that the difference exporting electric current can cause every road half-bridge circuit is unbalanced, the loss of every road half-bridge circuit is inconsistent, causes the overall performance of device to be deteriorated, and shortens the service life of device. Therefore, in order to ensure every road half-bridge circuit output electric current current-sharing of the combined semi bridge circuit 4 in the present embodiment, combined semi bridge circuit 4 be have employed sharing control by the present embodiment, exports with the half-bridge circuit current-sharing of control combination formula half-bridge circuit 4 Zhong Mei road.
Specifically, in order to combined semi bridge circuit 4 is adopted sharing control, in the present embodiment, controllable electromagnetic discharger in ocean also includes controller, and this controller includes master controller 7 and from controller group, and combined semi bridge circuit 4 is divided into main module circuit and from modular circuit; Using any one road half-bridge circuit in combined semi bridge circuit 4 as main module circuit; Using all half-bridge circuits except main module circuit in combined semi bridge circuit 4 as from modular circuit.
Fig. 3 illustrates that the combined semi bridge circuit that one embodiment of the invention provides carries out the structural representation of sharing control: consisted of example with combined semi bridge circuit by five road half-bridge circuits, using first via half-bridge circuit 4-1 as main module circuit, using the second road half-bridge circuit 4-2, the 3rd road half-bridge circuit (not shown), the 4th road half-bridge circuit (not shown) and the 5th road half-bridge circuit 4-5 as from modular circuit; Using the master controller 7 controller as above-mentioned main module circuit, using from controller group as from the controller of modular circuit: using first from controller 8-1 as the controller of the second road half-bridge circuit 4-2, using second from controller 8-2 as the controller of the 3rd road half-bridge circuit, using the 3rd from controller (not shown) as the controller of the 4th road half-bridge circuit, using the 4th from controller (not shown) as the controller of the 5th road half-bridge circuit 4-5.
Master controller 7 includes Control of Voltage outer shroud and electric current controls internal ring; The Voltage Feedback input of master controller is connected with the output-parallel node voltage testing circuit of combined semi bridge circuit 4, using the sys node voltage voltage feedback value as the Control of Voltage outer shroud of master controller 7; The current feedback input of master controller 7 is connected with the output current detection circuit of main module circuit, and main module circuit exports the electric current current feedback values as the electric current control internal ring of master controller 7; Using the Control of Voltage outer shroud output valve of master controller 7 as master controller 7 electric current control internal ring given value of current value. From controller group, respectively include current regulator from controller, be respectively respectively connected from the output current detection circuit of modular circuit with combined semi bridge circuit 4 from the current feedback input of controller; Master controller 7 is connected with emission source controller 10 by SPI communication, emission source controller 10 is connected with emission source control station 1-2 on ship by optical fiber, master controller 7 using the output voltage set in advance of emission source control station 1-2 transmission on the ship that receives and given value of current value as the set-point of the Control of Voltage outer shroud of master controller 7, it is achieved on described ship, emitting voltage and the emission current in underwater emission source 2 are controlled by emission source control station 1-2; Master controller 7 is respectively connected from controller with from controller group respectively by CAN; And the voltage control loop output valve in master controller 7 is transferred to each from controller by CAN, as the given value of current value of each current regulator from controller. Combined semi bridge circuit is adopted sharing control by the present embodiment, ensure that the stable operation of combined semi bridge circuit, it is ensured that the output current-sharing of combined semi bridge circuit, it is ensured that the output of every road half-bridge circuit is balanced, improve the performance of device, extend service life.
Specifically, on ship, emission power control station transmits output voltage and given value of current value are set in advance according to demand.
Specifically, Vg1, Vg2, Vg3, Vg4, the Vg5 in Fig. 3 is the input voltage of each road half-bridge circuit; A, B are two sys nodes of combined semi bridge circuit 4 outlet side, and Vo is A, B two point voltage; R_load is sea water load; Kv is sys node voltage detecting voltage change ratio; Kc1, Kc2, Kc3, Kc4, Kc5 are the output electric current measure no-load voltage ratio of each road half-bridge circuit; Vref is output voltage set-point; Vf is A, B two value of feedback of point voltage; Vc is the output of the master controller Voltage loop in first via half-bridge circuit 4-1; If1 is the output current feedback values of first via half-bridge circuit 4-1, the output current feedback values of If2, If3, If4, If5 respectively the second road half-bridge circuit 4-2, the 3rd road half-bridge circuit, the 4th road half-bridge circuit and the 5th road half-bridge circuit 4-5; D1, D2, D3, D4, D5 are the driving dutycycle of each road half-bridge circuit.
Specifically, the process of the sharing control in the present embodiment is as follows:
To the voltage control loop positive input input and output voltage specified rate Vref of master controller 7, input the Voltage Feedback amount Vf of A, B of the sys node of combined semi bridge circuit 4 to the voltage control loop reverse input end of master controller 7, the voltage control loop outfan of master controller 7 is connected with the positive input of the current regulator of master controller 7. The feedback current of the reverse input end input first via half-bridge circuit 4-1 of the current regulator of master controller 7. First from the current regulator of controller 8-1, second from the current regulator of controller, the 3rd be attached according to the connected mode identical with the current regulator of master controller 7 respectively from the current regulator and the 4th of controller from the current regulator of controller 8-4. Master controller 7 and four are connected from controller output end respectively through the drive end of five pulse-width modulator PWM and five road half-bridge circuits.
First via half-bridge circuit 4-1 is with Vref for output voltage specified rate, and outlet side sys node A, B voltage Vf of combined semi bridge circuit 4 is feedback quantity, and Vref and Vf obtains electric current by the Control of Voltage outer shroud of master controller 7 and controls internal ring specified rate Vc; The output current feedback amount If1 of Vc and first via half-bridge circuit 4-1 controls internal ring by the electric current of master controller 7, adjusts the driving dutycycle D1 of first via half-bridge circuit 4-1, it is ensured that the output voltage of combined semi bridge circuit 4 is constant.
From modular circuit, the Control of Voltage outer shroud of master controller 7 obtains Vc, pass through CAN, it is transferred to from modular circuit, as from the given value of current amount of the current regulator from controller group of modular circuit, Vc and the feedback quantity Ifi (i=2 exporting electric current from modular circuit self, 3,4,5) compare, again through each road from the current regulator from controller of modular circuit, calculate through current regulator and obtain, from the driving Duty ratio control amount D2 of modular circuit, D3, D4, D5, adjusting the output electric current from modular circuit. Owing to the current inner loop of master controller 7 is identical from the electric current loop specified rate of controller with four, also ensure the current-sharing output of combined semi bridge circuit 4 Zhong five road half-bridge circuit.
It should be noted that the Control of Voltage outer shroud relational expression of master controller 7 is as follows:
Vc=(Vref-Vf) GVC(1)
Wherein, GVCControl of Voltage outer shroud for master controller 7 transmits function.
It is as follows that the electric current of master controller 7 controls internal ring relational expression:
D1=(Vc-If1) GIC1(2)
Wherein, GIC1Electric current for master controller 7 controls internal ring transmission function.
Formula (2) is brought into formula (1) obtain:
D1=[(Vref-Vf) GVC-If1]GIC1(3)
In like manner, it is possible to obtain the current regulator relational expression from controller group:
D2=(Vc-If2) GIC2(4)
D3=(Vc-If3) GIC3(5)
D4=(Vc-If4) GIC4(6)
D5=(Vc-If5) GIC5(7)
Wherein, GIC2、GIC3、GIC4、GIC5Transmission function for each current regulator from controller from controller group 8.
Shown in five road input voltage relations such as formula (8) of combined semi bridge circuit 4:
Vg1=Vg2=Vg3=Vg4=Vg5=Vg/5 (8)
Wherein, Vg is the input voltage of combined semi bridge circuit 4.
In combined semi bridge circuit 4, five road half-bridge circuit output voltages and input voltage relation such as formula (9) are to shown in (13):
Wherein, the output voltage of Vo1, Vo2, Vo3, Vo4, Vo5 respectively five road half-bridge circuits; Transformer voltage ratio in n1, n2, n3, n4, n5 respectively five road half-bridge circuits. In conjunction with five road half-bridge circuit output voltages in combined semi bridge circuit 4 and input voltage relational expression, it is possible to obtain road half-bridge circuit output current relationship such as formula (14) to shown in (18):
If realizing five road half-bridge circuit output current-sharing in combined semi bridge circuit 4, namely make
Io1=Io2=Io3=Io4=Io5 (19)
Then must flow through master controller 7 and adjust output duty cycle from controller group 8, it is ensured that
D1/n1=D2/n2=D3/n3=D4/n4=D5/n5 (20)
Specifically, the ocean controllable electromagnetic discharger in the present embodiment also includes pulse-width modulator PWM group; Master controller 7 and being respectively connected with each pulse-width modulator PWM input pulse-width modulator PWM group respectively from the outfan of controller; Each pulse-width modulator PWM outfan is connected with the drive end of each half-bridge circuit in combined semi bridge circuit 4, drives the switching tube of each half-bridge circuit in combined semi bridge circuit 4.
Specifically, the pulse-width modulator PWM group in the present embodiment includes: the first pulse-width modulator PWM9-1, the second pulse-width modulator PWM9-2, the 3rd pulse-width modulator PWM (not shown), the 4th pulse-width modulator PWM (not shown) and the 5th pulse-width modulator PWM9-5.
It should be noted that, the present embodiment does not limit the quantity of the pulse-width modulator PWM in pulse-width modulator PWM group, those skilled in the art can according to the quantity of the half-bridge circuit in combined semi bridge circuit 4, and the pulse-width modulator PWM count amount in pulse-width modulated device PWM group is configured.
Specifically, the ocean controllable electromagnetic discharger in the present embodiment also includes emission source controller 10; Emission source controller 10 is connected with emission source control station 1-2 on ship by optical fiber, receive the tranmitting frequency set in advance sent by emission source control station 1-2 on ship, it is achieved the emission source control station 1-2 control to the tranmitting frequency in described underwater emission source 2 on described ship.
The outfan of emission source controller 10 is connected with the switching tube IGBT drive end of radiating circuit 6, controls the tranmitting frequency of emission source.
Specifically, the tranmitting frequency that on ship, emission source control station 1-2 sends is set in advance according to demand.
Specifically, as shown in Figure 4, the concrete principle that the ocean controllable electromagnetic discharger in the present embodiment runs is:
(1) on ship, the ship power source 1-1 in device provides power to be 125kVA by cable to underwater emission source 2, and voltage is 3000V, frequency is the single-phase alternating current of 50Hz.
(2) single phase alternating current power supply of 3000V/50Hz is carried out rectifying and wave-filtering by the single phase rectifier circuit 3 in underwater emission source 2, it is thus achieved that voltage is the DC voltage of 4200V.
(3) 4200V DC source is through dividing equally acquisition five road 840V DC sources; The combined semi bridge circuit 4 of Xiang You five road half-bridge circuit composition is powered respectively, combined semi bridge circuit 4 uses the single-phase alternating current that staggered actuation techniques becomes five tunnel frequencies to be 20KHz phase cross-over five road 840V DC inverters, again through the step-down transformer blood pressure lowering that no-load voltage ratio is 6:1 in five road half-bridge circuits, it is thus achieved that the low-voltage AC of five road 120V/20KHz phase cross-overs; Then in parallel after five road high frequency low voltage AC rectifications, after same LC wave filter 5 rectifying and wave-filtering, it is thus achieved that the unidirectional current of 100V.
(5) unidirectional current of 100V is launched by radiating circuit 6, it is thus achieved that power is 100KW, and electric current is the bi-directional pulse current that the frequency of 1000A is controlled.
(6) on ship, emitting voltage and emission current are transferred to emission source controller 10 by optical-fibre communications by emission source control station 1-2, the emitting voltage received and emission current are transferred to master controller 7 again through SPI communication by emission source controller 10, on ship, tranmitting frequency set in advance is transferred to emission source controller 10 by optical-fibre communications by emission source control station 1-2, thus realizing the emission source control station 1-2 control to underwater emission source 2 on ship. Simultaneously, the emitting voltage in underwater emission source 2, emission current are transferred to emission source controller 10 by SPI communication by master controller 7, the emitting voltage in underwater emission source 2, emission current and tranmitting frequency are transferred on ship emission source control station 1-2 by optical fiber by emission source controller 10, it is achieved monitor the tranmitting frequency in underwater emission source 2, emitting voltage and emission current in real time by emission source control station 1-2 on ship.
A kind of ocean controllable electromagnetic discharger that the present embodiment provides, emission source control station 1-2 on ship is connected with underwater emission source 2, magnitude of voltage, current value and the tranmitting frequency value that display underwater emission source 2 returns in real time, it is achieved that monitor the running status in underwater emission source 2 in real time.
As it is shown in figure 5, another embodiment of the present invention provides the control method of a kind of ocean controllable electromagnetic discharger that above-described embodiment provides, the method comprising the steps of S1 to S5:
S1, described ship power source 1-1 launch the single phase industrial frequence more than 1000V or medium frequency alternating current to described underwater emission source 2;
The described single phase industrial frequence more than 1000V or medium frequency alternating current are carried out rectifying and wave-filtering by S2, described rectification circuit, obtain high voltage direct current;
Described combined semi bridge circuit 4 multiple-channel output, through described combined semi bridge circuit 4 series connection input Parallel opertation, is parallel-connected to described LC wave filter 5 by S3, described high voltage direct current;
Described multiple-channel output is filtered by S4, described LC wave filter 5, obtains low-voltage DC;
S5, described radiating circuit 6 are according to described high-power low-voltage DC, the bi-directional pulse current that tranmitting frequency is controlled.
Specifically, the control method of the ocean controllable electromagnetic discharger in the present embodiment, including step unshowned in Fig. 5:
A1, described master controller 7, described from controller group and described emission source controller 10 respectively by main module circuit output, be transferred to described ship emission source control station 1-2 from modular circuit output and tranmitting frequency;
On A2, described ship emission source control station 1-2 by described main module circuit output, described display from modular circuit output and described tranmitting frequency, it is achieved monitor the emission state in described underwater emission source 2 in real time.
On A3, described ship, emission source control station 1-2 sends described output voltage set in advance, described output electric current set in advance and described tranmitting frequency set in advance to described emission source controller 10 by optical fiber, the output voltage first set and described output electric current set in advance are transferred to described master controller 7 by SPI communication by described emission source controller 10, the emitting voltage in described underwater emission source 2, emission current and tranmitting frequency are controlled realizing emission source control station 1-2 on described ship.
Specifically, the control method of the ocean controllable electromagnetic discharger that the present embodiment provides, also include not shown following steps B1:
Switching tube IGBT in B1, described each half-bridge circuit adopts staggered actuation techniques so that the driving pulse phase place of each road half-bridge circuit intermeshes.
In the above-described embodiments, the switching tube in five road half-bridge circuits adopts staggered actuation techniques, and detailed process is:
The driving pulse conduction phase of five switching tubes S1, S3, S5, S7, S9 of the same position in five road half-bridge circuits differs 1/10 switch periods successively; Same, the driving pulse conduction phase of other five switching tubes S2, S4, S6, S8, S10 of the same position in five road half-bridge circuits also differs 1/10 switch periods successively, and S1, S2, S3, S4, S5, S6, S7, S8, S9, S10 conduction phase is as shown in Figure 6.
The driving pulse phase place of every road half-bridge circuit intermeshes, realize combined semi bridge circuit 4 structure output crisscross parallel, and by sharing one group of filter inductance and filter capacitor filtering output, i.e. LC wave filter 5, make output ripple current frequency multiplication, reducing and flow through filter inductance pulsation of current amplitude, waveform is smoother, five road half-bridge circuits output electric currents with in parallel after always output current wave figure is as shown in Figure 7.
It should be noted that, staggered actuation techniques is adopted by the switching tube in combined semi bridge circuit 4, improve the pulsation of current frequency of the outfan of combined semi bridge circuit 4, significantly have compressed the volume of filter inductance and numerical value, reduce the pulsation of current amplitude flowing through filter inductance so that the current waveform of combined semi bridge circuit 4 output is more smooth.
The staggered actuation techniques adopted in the present embodiment so that the volume of the LC wave filter 5 of design output reduces, and reduces loss.
The control method of a kind of ocean controllable electromagnetic discharger that the present embodiment provides, by adopting single-phase high voltage ac transmission, improves electric energy efficiency of transmission; Adopt the combined semi bridge circuit of multichannel half-bridge circuit input series and output parallel simultaneously, high voltage direct current is converted to low-voltage DC, increase the transmitting power of emission source, reduce the voltage stress of circuit devcie so that the requirement of parts selection is reduced, improve the switching frequency of combined semi bridge circuit 4, promote emission source power density, reduce device volume, shorten construction period, save Financial cost.
One of ordinary skill in the art will appreciate that: various embodiments above only in order to technical scheme to be described, is not intended to limit; Although the present invention being described in detail with reference to foregoing embodiments, it will be understood by those within the art that: the technical scheme described in foregoing embodiments still can be modified by it, or wherein some or all of technical characteristic is carried out equivalent replacement; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of the claims in the present invention.
Claims (10)
1. an ocean controllable electromagnetic discharger, it is characterised in that including: device and underwater emission source on ship;
On described ship, device includes ship power source, and described ship power source is connected with described underwater emission source, sends the single phase industrial frequence more than 1000V or medium frequency alternating current to described underwater emission source;
Described underwater emission source receives the described single phase industrial frequence more than 1000V or medium frequency alternating current, and the described single phase industrial frequence more than 1000V or medium frequency alternating current are converted to high power low-frequency low-voltage AC, the bi-directional pulse current that tranmitting frequency is controlled.
2. device according to claim 1, it is characterised in that on described ship, device also includes emission source control station on ship;
On described ship, emission source control station is connected with described underwater emission source, monitors and control the emission state in described underwater emission source in real time.
3. device according to claim 1, it is characterised in that described underwater emission source, including: rectification circuit, combined semi bridge circuit, LC wave filter and radiating circuit;
Described rectification circuit input end is connected with described ship power source, and single phase industrial frequence more than 1000V described in receiving or medium frequency alternating current are converted to high voltage direct current;
The input series connection of each half-bridge circuit in described combined semi bridge circuit, and be connected with described rectification circuit output end; It is connected with described LC filter input end after the outfan parallel connection of each half-bridge circuit in described combined semi bridge circuit; Realize described high voltage direct current and be converted to low-voltage DC;
Described radiating circuit input is connected with described LC filter output; Described radiating circuit obtains high power low-frequency low-voltage AC according to described low-voltage DC, the bi-directional pulse current that tranmitting frequency is controlled.
4. device according to claim 3, it is characterised in that described combined semi bridge circuit includes main module circuit and from modular circuit;
Described main module circuit is any one road half-bridge circuit in described combined semi bridge circuit;
Described from modular circuit be half-bridge circuit except main module circuit described combined semi bridge circuit.
5. device according to claim 4, it is characterised in that described device also includes controller;
Described controller includes a master controller and from controller group, and described master controller is the controller of described main module circuit, described from control group be the described controller from modular circuit;
Described master controller includes Control of Voltage outer shroud and electric current controls internal ring;
The Voltage Feedback input of described master controller is connected with the output-parallel node voltage testing circuit of described combined semi bridge circuit, using the sys node voltage voltage feedback value as the Control of Voltage outer shroud of described master controller;
The current feedback input of described master controller is connected with the output current detection circuit of described main module circuit, and described main module circuit exports the electric current current feedback values as the electric current control internal ring of described master controller; Using the Control of Voltage outer shroud output valve of described master controller as described master controller electric current control internal ring given value of current value;
Described from controller group, respectively include current regulator from controller, described respectively respectively it is connected from the output current detection circuit of modular circuit with described combined semi bridge circuit from the current feedback input of controller, exports the electric current current feedback values as the described current regulator from controller using described from modular circuit;
On described ship, emission source control station is connected with emission source controller by optical fiber, described emission source controller is connected with described master controller by SPI communication, described master controller by emission source control station on the described ship that receives using set-point as the Control of Voltage outer shroud of described master controller of output voltage set in advance and given value of current value, it is achieved the control of the emission source control station emitting voltage to underwater emission source and emission current on described ship;
Described master controller is respectively connected from controller from controller group with described respectively by CAN; And the voltage control loop output valve in described master controller is transferred to described each from controller by CAN, as the given value of current value of described each current regulator from controller.
6. device according to claim 5, it is characterised in that described device also includes pulse-width modulator PWM group;
Described master controller and described be respectively connected with each pulse-width modulator PWM input described pulse-width modulator PWM group respectively from the outfan of controller;
Described each pulse-width modulator PWM outfan is connected with the drive end of each half-bridge circuit in described combined semi bridge circuit, drives the switching tube of each half-bridge circuit in described combined semi bridge circuit.
7. device according to claim 2, it is characterised in that described device also includes emission source controller;
Described emission source controller is connected with described emission source control station by optical fiber, receive the tranmitting frequency set in advance that on described ship, emission source control station sends, the outfan of described emission source controller is connected with the switching tube IGBT drive end of described radiating circuit, it is achieved the emission source control station control to the tranmitting frequency in described underwater emission source on described ship.
8. the control method of a kind of ocean controllable electromagnetic discharger as described in any one of claim 1-7, it is characterised in that described method includes:
Described ship power source launches the single phase industrial frequence more than 1000V or midfrequent AC voltage to described underwater emission source;
The described single phase industrial frequence more than 1000V or medium frequency alternating current are carried out rectifying and wave-filtering by described rectification circuit, obtain high voltage direct current;
Described combined semi bridge circuit multiple-channel output, through described combined semi bridge circuit series connection input Parallel opertation, is parallel-connected to described LC wave filter by described high voltage direct current;
Described multiple-channel output is filtered by described LC wave filter, obtains low-voltage DC;
Described radiating circuit according to described low-voltage DC, the bi-directional pulse current that tranmitting frequency is controlled.
9. method according to claim 8, it is characterised in that described method also includes:
Described master controller, described from controller group and described emission source controller respectively by main module circuit output, be transferred to described ship emission source control station from modular circuit output and tranmitting frequency;
On described ship emission source control station by described main module circuit output, described display from modular circuit output and described tranmitting frequency, it is achieved monitor the emission state in described underwater emission source in real time;
On described ship, emission source control station sends described output voltage set in advance, described output electric current set in advance and described tranmitting frequency set in advance to described emission source controller by optical fiber, described emission source controller is connected with described master controller by SPI communication, described output voltage set in advance and described output electric current set in advance are transferred to master controller, it is achieved on described ship, the emitting voltage in described underwater emission source, emission current and tranmitting frequency are controlled by emission source control station.
10. method according to claim 8, it is characterised in that described method also includes:
Switching tube IGBT in described each half-bridge circuit adopts staggered actuation techniques so that the driving pulse phase place of each road half-bridge circuit intermeshes.
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