CN103472305A - Measurement device and measurement method of electrode impedance of three-electrode electric furnace - Google Patents
Measurement device and measurement method of electrode impedance of three-electrode electric furnace Download PDFInfo
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Abstract
The invention discloses a measurement device of the electrode impedance of a three-electrode electric furnace. The measurement device comprises a current measurement device, a voltage measurement device and a controller. The current measurement device comprises a first current transformer, a second current transformer and a third current transformer, the currents of three electrodes of the electric furnace are measured through the first current transformer, the second current transformer and the third current transformer respectively, and the first current transformer, the second current transformer and the third current transformer are connected in a triangular mode and arranged corresponding to the three electrodes respectively. The voltages of the three electrodes are measured through the voltage measurement device, and the voltage measurement device is respectively connected with the three electrodes. The controller is respectively connected with the current measurement device and the voltage measurement device, and the impedances of the three electrodes are respectively measured through the controller according to the currents and the corresponding voltages of the three electrodes. According to the measurement device, the accurate current values of the electrodes can be measured under the condition that loads are unbalanced, then the accurate impedance values of the electrodes are obtained, influences of short net tail end wiring are eliminated, and accurate judgment on and accurate control over the inserting depths of the electrodes and the power of the electric furnace are achieved. The invention further discloses a measurement method of the electrode impedance of the three-electrode electric furnace.
Description
Technical field
The present invention relates to metallurgical technology field, particularly the measuring method of the electrode impedance of a kind of measurement mechanism of electrode impedance of three electrode electric furnaces and a kind of three electrode electric furnaces.
Background technology
Electric furnace has a wide range of applications in smelting process, and wherein the Measurement accuracy of electrode impedance value has vital impact for judging the electrode insertion depth and carrying out furnace power control.In the prior art, usually directly utilize the corresponding current transformer of each winding of furnace transformer to export to detect the electric current of counter electrode, thereby obtain the electrode impedance value.
But, the shortcoming that prior art exists is, the leg-of-mutton connected mode of the general employing of electric furnace short net end, only in the situation that the balancing the load of three electrodes, the electrode impedance value measured is only accurately, in other cases, all can there be deviation in the electrode impedance value measured, thereby can't obtain electrode impedance value accurately.
Summary of the invention
Purpose of the present invention is intended to solve at least to a certain extent above-mentioned technological deficiency.
For this reason, one object of the present invention is to propose a kind of measurement mechanism of electrode impedance of three electrode electric furnaces, this measurement mechanism is connected three current transformers in leg-of-mutton mode, thereby also can measure electrode impedance value accurately in the situation that load unbalanced, eliminate the impact of short net end wiring.
Another object of the present invention is to propose a kind of measuring method of electrode impedance of three electrode electric furnaces.
For achieving the above object, the measurement mechanism of the electrode impedance of a kind of three electrode electric furnaces that one aspect of the present invention embodiment proposes, comprise: current measurer, described current measurer comprises respectively the first current transformer that the electric current of three electrodes of electric furnace is measured, the second current transformer and the 3rd current transformer, described the first current transformer, the second current transformer is connected in leg-of-mutton mode with the 3rd current transformer, and described the first current transformer, the second current transformer and the 3rd current transformer should arrange with described three electrode pairs respectively, the voltage measurement device that the voltage of described three electrodes is measured, described voltage measurement device is connected respectively with described three electrodes, controller, described controller is connected respectively with the voltage measurement device with described current measurer, the impedance that the voltage that described controller is answered according to the electric current of described three electrodes and three electrode pairs calculates respectively described three electrodes.
The measurement mechanism of the electrode impedance of the three electrode electric furnaces that propose according to the embodiment of the present invention, the first current transformer, the second current transformer is connected in leg-of-mutton mode with the 3rd current transformer, and the electric current of three electrodes of electric furnace is measured, and the voltage measurement device is connected respectively with three electrodes, and the voltage of three electrodes is measured, the impedance that the voltage that controller is answered according to the electric current of three electrodes and three electrode pairs calculates respectively three electrodes, thereby measurement mechanism of the present invention can be in the situation that three load unbalanced electrode current values accurately that measure of electrode, and then obtain electrode impedance value accurately, improve measuring accuracy, eliminate the impact of short net end wiring, realize accurate judgement and the control of electrode insertion depth and furnace power.
In one embodiment of the invention, described voltage measurement device is threephase potential transformer, and the armature winding of described threephase potential transformer all is connected in the mode of star with secondary winding.
Particularly, described the first current transformer, the second current transformer and the 3rd current transformer be corresponding being arranged on secondary three phase windings of furnace transformer respectively, or correspondence is arranged on be connected with secondary three phase windings of described furnace transformer short online respectively.
In a preferred embodiment of the invention, the measurement mechanism of the electrode impedance of three above-mentioned electrode electric furnaces, also comprise: multifunction instrument, described multifunction instrument is connected between described controller and described current measurer, and be connected between described controller and described voltage measurement device, electric current and the voltage of described three electrodes of described multifunction instrument display measurement, and the electric current of described three electrodes and voltage are sent to described controller.Wherein, described controller can be the PLC controller.
For achieving the above object, the present invention embodiment has on the other hand proposed a kind of measuring method of electrode impedance of three electrode electric furnaces, it comprises the following steps: by the first current transformer, the second current transformer and the 3rd current transformer, respectively the electric current of three electrodes of electric furnace is measured, wherein, described the first current transformer, the second current transformer and the 3rd current transformer are connected in leg-of-mutton mode; By threephase potential transformer, the voltage of described three electrodes is measured, wherein, the armature winding of described threephase potential transformer all is connected in the mode of star with secondary winding; The impedance that the voltage of answering according to the electric current of described three electrodes and three electrode pairs calculates respectively described three electrodes.
The measuring method of the electrode impedance of the three electrode electric furnaces that propose according to the embodiment of the present invention, by the first current transformer connected in leg-of-mutton mode, the second current transformer and the 3rd current transformer are measured the electric current of three electrodes of electric furnace respectively, and by threephase potential transformer, the voltage of three electrodes is measured, and the impedance of according to the voltage that the electric current of three electrodes and three electrode pairs are answered, calculating respectively three electrodes, thereby measuring method of the present invention can be in the situation that three load unbalanced electrode current values accurately that measure of electrode, and then obtain electrode impedance value accurately, improve measuring accuracy, eliminate the impact of short net end wiring, realize accurate judgement and the control of electrode insertion depth and furnace power.
Particularly, in one embodiment of the invention, described the first current transformer, the second current transformer and the 3rd current transformer be corresponding being arranged on secondary three phase windings of furnace transformer respectively, or correspondence is arranged on be connected with secondary three phase windings of described furnace transformer short online respectively.
In a preferred embodiment of the invention, the measuring method of the electrode impedance of three above-mentioned electrode electric furnaces also comprises: electric current and the voltage of described three electrodes of display measurement.
The aspect that the present invention is additional and advantage part in the following description provide, and part will become obviously from the following description, or recognize by practice of the present invention.
The accompanying drawing explanation
Above-mentioned and/or the additional aspect of the present invention and advantage will become from the following description of the accompanying drawings of embodiments and obviously and easily understand, wherein:
Fig. 1 is the block diagram according to the measurement mechanism of the electrode impedance of three electrode electric furnaces of the embodiment of the present invention;
The block diagram that Fig. 2 is the measurement mechanism of the electrode impedance of three electrode electric furnaces of a specific embodiment according to the present invention;
The block diagram of the measurement mechanism of the electrode impedance that Fig. 3 is three electrode electric furnaces in accordance with a preferred embodiment of the present invention; And
Fig. 4 is the process flow diagram according to the measuring method of the electrode impedance of three electrode electric furnaces of the embodiment of the present invention.
Embodiment
Below describe embodiments of the invention in detail, the example of described embodiment is shown in the drawings, and wherein same or similar label means same or similar element or the element with identical or similar functions from start to finish.Be exemplary below by the embodiment be described with reference to the drawings, only for explaining the present invention, and can not be interpreted as limitation of the present invention.
Disclosing hereinafter provides many different embodiment or example to be used for realizing different structure of the present invention.Of the present invention open in order to simplify, hereinafter parts and the setting of specific examples are described.Certainly, they are only example, and purpose does not lie in restriction the present invention.In addition, the present invention can be in different examples repeat reference numerals and/or letter.This repetition is in order to simplify and purpose clearly, itself do not indicate the relation between discussed various embodiment and/or setting.In addition, the various specific technique the invention provides and the example of material, but those of ordinary skills can recognize the property of can be applicable to of other techniques and/or the use of other materials.In addition, First Characteristic described below Second Characteristic it " on " structure can comprise that the first and second Characteristics creations are for the direct embodiment of contact, also can comprise the embodiment of other Characteristics creation between the first and second features, such the first and second features may not be direct contacts.
In description of the invention, it should be noted that, unless otherwise prescribed and limit, term " installation ", " being connected ", " connection " should be done broad understanding, for example, can be mechanical connection or electrical connection, can be also the connection of two element internals, can be directly to be connected, and also can indirectly be connected by intermediary, for the ordinary skill in the art, can understand as the case may be the concrete meaning of above-mentioned term.
With reference to following description and accompanying drawing, these and other aspects of embodiments of the invention will be known.These describe and accompanying drawing in, specifically disclose some specific implementations in embodiments of the invention, mean to implement some modes of the principle of embodiments of the invention, still should be appreciated that the scope of embodiments of the invention is not limited.On the contrary, embodiments of the invention comprise spirit and interior all changes, modification and the equivalent of intension scope that falls into additional claims.
Measurement mechanism and the measuring method thereof of the electrode impedance of the three electrode electric furnaces that propose according to the embodiment of the present invention are described with reference to the accompanying drawings.
Fig. 1 is the block diagram according to the measurement mechanism of the electrode impedance of three electrode electric furnaces of the embodiment of the present invention.As shown in Figure 1, the measurement mechanism of the electrode impedance of this three electrodes electric furnace comprises: current measurer 10, voltage measurement device 20, controller 30.
Wherein, current measurer 10 comprises respectively the first current transformer Ta that the electric current of three electrodes of electric furnace is measured, the second current transformer Tb and the 3rd current transformer Tc, wherein, the first current transformer Ta, the second current transformer Tb is connected in leg-of-mutton mode with the 3rd current transformer Tc, say, 1 end of the first current transformer Ta is connected with 2 ends of the 3rd current transformer Tc, 2 ends of the first current transformer Ta are connected with 1 end of the second current transformer Tb, 2 ends of the second current transformer Tb are connected with 1 end of the 3rd current transformer Tc.And, the first current transformer Ta, the second current transformer Tb and the 3rd current transformer Tc should arrange with three electrode pairs respectively, that is to say, the installation site of the first current transformer Ta, the second current transformer Tb and the 3rd current transformer Tc respectively should with three electrode pairs, for example, 2 ends of the first current transformer Ta are connected with electrode 2, and 2 ends of the second current transformer Tb are connected with electrode 3, and 2 ends of the 3rd current transformer Tc are connected with electrode 1.Particularly, the first current transformer Ta, the second current transformer Tb and the 3rd current transformer Tc can be all single-phase current transformer.
As shown in Figure 1, the voltage of 20 pairs of three electrodes of voltage measurement device is measured, and voltage measurement device 20 is connected respectively with three electrodes.Controller 30 is connected respectively with voltage measurement device 20 with current measurer 10, the impedance that the voltage that controller 30 is answered according to the electric current of three electrodes that measure and three electrode pairs calculates respectively three electrodes.
Particularly, controller 30 calculates respectively the impedance of three electrodes according to Ohm law, the impedance of according to following formula, calculating respectively three electrodes:
Wherein, the electric current that I is three electrodes, the voltage of the correspondence that U is three electrodes, the impedance of the correspondence that R is three electrodes.
In specific embodiment of the present invention, as shown in Figure 2, voltage measurement device 20 can be threephase potential transformer, and the armature winding of threephase potential transformer all is connected in the mode of star with secondary winding.
As shown in Figure 1 or 2, the first current transformer Ta, the second current transformer Tb and the 3rd current transformer Tc can be respectively corresponding be arranged on secondary three phase windings of furnace transformer 40, be connected short on the net.It should be noted that, short net also claims heavy current circuit, refers to the general name of the carrying object that (comprises electrode) from the transformer secondary leading-out terminal to electrode.I.e. speech, 1 end of 1 end of the first current transformer Ta, the second current transformer Tb and 1 end of the 3rd current transformer Tc are connected with the leading-out terminal of secondary three phase windings of furnace transformer 40 respectively.
In addition, the first current transformer Ta, the second current transformer Tb and the 3rd current transformer Tc are can also be respectively corresponding is arranged on secondary three phase windings of furnace transformer 40.
In the present invention, be in an example, as shown in Figure 1 or 2, secondary three phase windings of furnace transformer 40 can be connected in leg-of-mutton mode, and elementary three phase windings of furnace transformer 40 can be connected in the mode of star.
In a preferred embodiment of the invention, as shown in Figure 3, the measurement mechanism of the electrode impedance of three above-mentioned electrode electric furnaces also comprises: multifunction instrument 50.Wherein, multifunction instrument 50 is connected between controller 30 and current measurer 10, and be connected between controller 30 and voltage measurement device 20, electric current and the voltage of three electrodes of multifunction instrument 50 display measurements, and the electric current of three electrodes and voltage are sent to controller 30.
Wherein, controller 30 can be the PLC controller, multifunction instrument 50 has communication interface, for example communication interface can adopt the Profibus communications protocol, and, by the communication interface of multifunction instrument 50, realize three voltages that electrode pair is answered measuring with electric current and the voltage measurement device 20 of three electrodes of transmission current measuring appliance 10 measurements with the communication of controller 30.
In an embodiment of the present invention, utilize a multifunction instrument 50, three single-phase current transformers, a threephase potential transformer, by three current transformers are connected in leg-of-mutton mode, the measurement of realization to the electric current of three electrodes, and the armature winding by a threephase potential transformer all is connected in the mode of star with secondary winding, the measurement of realization to the voltage of the correspondence of three electrodes, the electric current of three above-mentioned electrodes and corresponding voltage transfer to the PLC controller by the communication interface of multifunction instrument, the PLC controller is according to Ohm law, calculate the impedance of the correspondence of three electrodes.
The measurement mechanism of the electrode impedance of the three electrode electric furnaces that propose according to the embodiment of the present invention, the first current transformer, the second current transformer is connected in leg-of-mutton mode with the 3rd current transformer, and the electric current of three electrodes of electric furnace is measured, and the voltage measurement device is connected respectively with three electrodes, and the voltage of three electrodes is measured, the impedance that the voltage that controller is answered according to the electric current of three electrodes and three electrode pairs calculates respectively three electrodes, thereby measurement mechanism of the present invention can be in the situation that three load unbalanced electrode current values accurately that measure of electrode, and then obtain electrode impedance value accurately, improve measuring accuracy, eliminate the impact of short net end wiring, realize accurate judgement and the control of electrode insertion depth and furnace power.
Fig. 4 is the process flow diagram according to the measuring method of the electrode impedance of three electrode electric furnaces of the embodiment of the present invention.As shown in Figure 4, the measuring method of the electrode impedance of this three electrodes electric furnace comprises the following steps:
S1, measured the electric current of three electrodes of electric furnace respectively by the first current transformer, the second current transformer and the 3rd current transformer.Wherein, the first current transformer, the second current transformer and the 3rd current transformer are connected in leg-of-mutton mode.
Wherein, the first current transformer, the second current transformer and the 3rd current transformer be corresponding being arranged on secondary three phase windings of furnace transformer respectively, or correspondence is arranged on be connected with secondary three phase windings of furnace transformer short online respectively.It should be noted that, short net also claims heavy current circuit, refers to the general name of the carrying object that (comprises electrode) from the transformer secondary leading-out terminal to electrode.
S2, measured the voltage of three electrodes by threephase potential transformer.Wherein, the armature winding of threephase potential transformer all is connected in the mode of star with secondary winding.
In one embodiment of the invention, can also pass through electric current and the voltage of three electrodes of multifunction instrument display measurement, and electric current and the voltage of three electrodes will measuring are sent to controller.
S3, the impedance that the voltage of answering according to the electric current of three electrodes and three electrode pairs calculates respectively three electrodes.
Controller is according to electric current and three voltages that electrode pair is answered of three electrodes, and the impedance of calculating respectively three electrodes according to Ohm law, the impedance of according to following formula, calculating respectively three electrodes:
Wherein, the electric current that I is three electrodes, the voltage of the correspondence that U is three electrodes, the impedance of the correspondence that R is three electrodes.
The measuring method of the electrode impedance of the three electrode electric furnaces that propose according to the embodiment of the present invention, by the first current transformer connected in leg-of-mutton mode, the second current transformer and the 3rd current transformer are measured the electric current of three electrodes of electric furnace respectively, and by threephase potential transformer, the voltage of three electrodes is measured, and the impedance of according to the voltage that the electric current of three electrodes and three electrode pairs are answered, calculating respectively three electrodes, thereby measuring method of the present invention can be in the situation that three load unbalanced electrode current values accurately that measure of electrode, and then obtain electrode impedance value accurately, improve measuring accuracy, eliminate the impact of short net end wiring, realize accurate judgement and the control of electrode insertion depth and furnace power.
In process flow diagram or any process of otherwise describing at this or method describe and can be understood to, mean to comprise one or more module, fragment or part for the code of the executable instruction of the step that realizes specific logical function or process, and the scope of the preferred embodiment of the present invention comprises other realization, wherein can be not according to order shown or that discuss, comprise according to related function by the mode of basic while or by contrary order, carry out function, this should be understood by the embodiments of the invention person of ordinary skill in the field.
The logic and/or the step that mean or otherwise describe at this in process flow diagram, for example, can be considered to the sequencing list of the executable instruction for realizing logic function, may be embodied in any computer-readable medium, use for instruction execution system, device or equipment (as the computer based system, comprise that the system of processor or other can and carry out the system of instruction from instruction execution system, device or equipment instruction fetch), or use in conjunction with these instruction execution systems, device or equipment.With regard to this instructions, " computer-readable medium " can be anyly can comprise, storage, communication, propagation or transmission procedure be for instruction execution system, device or equipment or the device that uses in conjunction with these instruction execution systems, device or equipment.The example more specifically of computer-readable medium (non-exhaustive list) comprises following: the electrical connection section (electronic installation) with one or more wirings, portable computer diskette box (magnetic device), random-access memory (ram), ROM (read-only memory) (ROM), the erasable ROM (read-only memory) (EPROM or flash memory) of editing, fiber device, and portable optic disk ROM (read-only memory) (CDROM).In addition, computer-readable medium can be even paper or other the suitable medium that can print described program thereon, because can be for example by paper or other media be carried out to optical scanning, then edited, decipher or process in the electronics mode and obtain described program with other suitable methods in case of necessity, then it is stored in computer memory.
Should be appreciated that each several part of the present invention can realize with hardware, software, firmware or their combination.In the above-described embodiment, a plurality of steps or method can realize with being stored in storer and by software or the firmware of suitable instruction execution system execution.For example, if realize with hardware, the same in another embodiment, can realize by any one in following technology well known in the art or their combination: have for data-signal being realized to the discrete logic of the logic gates of logic function, special IC with suitable combinational logic gate circuit, programmable gate array (PGA), field programmable gate array (FPGA) etc.
Those skilled in the art are appreciated that and realize that all or part of step that above-described embodiment method is carried is to come the hardware that instruction is relevant to complete by program, described program can be stored in a kind of computer-readable recording medium, this program, when carrying out, comprises step of embodiment of the method one or a combination set of.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing module, can be also that the independent physics of unit exists, and also can be integrated in a module two or more unit.Above-mentioned integrated module both can adopt the form of hardware to realize, also can adopt the form of software function module to realize.If described integrated module usings that the form of software function module realizes and during as production marketing independently or use, also can be stored in a computer read/write memory medium.
The above-mentioned storage medium of mentioning can be ROM (read-only memory), disk or CD etc.
In the description of this instructions, the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present invention or example in conjunction with specific features, structure, material or the characteristics of this embodiment or example description.In this manual, the schematic statement of above-mentioned term not necessarily referred to identical embodiment or example.And the specific features of description, structure, material or characteristics can be with suitable mode combinations in any one or more embodiment or example.
Although illustrated and described embodiments of the invention, for the ordinary skill in the art, be appreciated that without departing from the principles and spirit of the present invention and can carry out multiple variation, modification, replacement and modification to these embodiment, scope of the present invention is by claims and be equal to and limit.
Claims (8)
1. the measurement mechanism of the electrode impedance of an electrode electric furnace, is characterized in that, comprising:
Current measurer, described current measurer comprises respectively the first current transformer, the second current transformer and the 3rd current transformer that the electric current of three electrodes of electric furnace is measured, described the first current transformer, the second current transformer and the 3rd current transformer are connected in leg-of-mutton mode, and described the first current transformer, the second current transformer and the 3rd current transformer should arrange with described three electrode pairs respectively;
The voltage measurement device that the voltage of described three electrodes is measured, described voltage measurement device is connected respectively with described three electrodes; And
Controller, described controller is connected respectively with the voltage measurement device with described current measurer, the impedance that the voltage that described controller is answered according to the electric current of described three electrodes and three electrode pairs calculates respectively described three electrodes.
2. the measurement mechanism of the electrode impedance of three electrode electric furnaces as claimed in claim 1, is characterized in that, described voltage measurement device is threephase potential transformer, and the armature winding of described threephase potential transformer all is connected in the mode of star with secondary winding.
3. the measurement mechanism of the electrode impedance of three electrode electric furnaces as claimed in claim 1, it is characterized in that, described the first current transformer, the second current transformer and the 3rd current transformer be corresponding being arranged on secondary three phase windings of furnace transformer respectively, or correspondence is arranged on be connected with secondary three phase windings of described furnace transformer short online respectively.
4. as the measurement mechanism of the electrode impedance of the described three electrode electric furnaces of any one in claim 1-3, it is characterized in that, also comprise:
Multifunction instrument, described multifunction instrument is connected between described controller and described current measurer, and be connected between described controller and described voltage measurement device, electric current and the voltage of described three electrodes of described multifunction instrument display measurement, and the electric current of described three electrodes and voltage are sent to described controller.
5. the measurement mechanism of the electrode impedance of three electrode electric furnaces as claimed in claim 1, is characterized in that, described controller is the PLC controller.
6. the measuring method of the electrode impedance of an electrode electric furnace, is characterized in that, comprises the following steps:
By the first current transformer, the second current transformer and the 3rd current transformer, respectively the electric current of three electrodes of electric furnace is measured, wherein, described the first current transformer, the second current transformer and the 3rd current transformer are connected in leg-of-mutton mode;
By threephase potential transformer, the voltage of described three electrodes is measured, wherein, the armature winding of described threephase potential transformer all is connected in the mode of star with secondary winding; And
The impedance that the voltage of answering according to the electric current of described three electrodes and three electrode pairs calculates respectively described three electrodes.
7. the measuring method of the electrode impedance of three electrode electric furnaces as claimed in claim 6, it is characterized in that, described the first current transformer, the second current transformer and the 3rd current transformer be corresponding being arranged on secondary three phase windings of furnace transformer respectively, or correspondence is arranged on be connected with secondary three phase windings of described furnace transformer short online respectively.
8. the measuring method of the electrode impedance of three electrode electric furnaces as claimed in claim 6, is characterized in that, also comprises:
Electric current and the voltage of described three electrodes of display measurement.
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| CN105841487A (en) * | 2016-04-19 | 2016-08-10 | 湖南水口山有色金属集团有限公司 | Smelting furnace heat compensating device and smelting furnace |
| CN105841487B (en) * | 2016-04-19 | 2018-02-23 | 湖南水口山有色金属集团有限公司 | A kind of smelting furnace heat patching device and smelting furnace |
| CN107504892A (en) * | 2017-10-13 | 2017-12-22 | 中国恩菲工程技术有限公司 | Ore-smelting electric furnace thickness of slag layer detection means and detection method |
| CN107504892B (en) * | 2017-10-13 | 2023-04-28 | 中国恩菲工程技术有限公司 | Device and method for detecting thickness of submerged arc furnace slag layer |
| CN110007186A (en) * | 2019-04-23 | 2019-07-12 | 成都绎码科技有限公司 | A kind of detection of electrical leakage remote alarming device and method |
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| Publication number | Publication date |
|---|---|
| CN103472305B (en) | 2016-03-30 |
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