CN111412747A - Submerged arc electric furnace power control method and device and electronic equipment - Google Patents
Submerged arc electric furnace power control method and device and electronic equipment Download PDFInfo
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Abstract
The disclosure provides a submerged arc electric furnace power control method and device and electronic equipment. The method comprises the following steps: acquiring a target power change curve and power adjusting parameters, wherein the power adjusting parameters comprise resistance adjusting parameters and voltage adjusting parameters; determining a current power formula with variable parameters according to the power adjusting parameters; determining the parameter of the current power formula according to the minimum value of the difference between the target power change curve and the current power formula in the current regulation time period; determining a resistance adjustment value and a voltage adjustment value in the current adjustment time period according to parameters of the current power formula; and adjusting the power of the arc-buried electric furnace in the current time period according to the resistance adjusting value and the voltage adjusting value. According to the power control method of the submerged arc electric furnace, the optimized linkage of electrode lifting and voltage gear lifting is innovatively provided, the smooth adjustment of the power of the submerged arc electric furnace in the climbing and descending processes is realized, and the problems of power jump change and impact on a power grid in the power adjustment process of the submerged arc electric furnace can be solved.
Description
Technical Field
The disclosure relates to the technical field of electronic circuits, in particular to a power control method and device for a submerged arc electric furnace and electronic equipment, wherein the power control method and device can realize smooth adjustment of the power of the submerged arc electric furnace.
Background
The submerged arc electric furnace is an important smelting device, the end part of an electrode is buried in materials (charging materials for short) in the electric furnace in the working process, and the heating principle is that metal is smelted by utilizing heat generated by the resistance of the charging materials when current passes through the charging materials.
The power of the electric furnace is determined by two parameters of electrode voltage and electrode impedance, and the power of the electric furnace can be changed by changing the electrode resistance by lifting the electrode or changing the electrode voltage by adjusting the gear of an on-load tap changer of a transformer of the electric furnace. In the working process of the electric furnace, in order to stabilize the temperature gradient distribution, the electrode resistance is required to be kept to change in a certain smaller interval, the power regulation range is smaller, and therefore when the electric furnace is greatly improved or reduced in power, the electric furnace is mainly realized by regulating the gear of the on-load voltage regulation of the transformer.
Because a certain voltage span exists between each gear of the on-load voltage regulation of the transformer, the voltage of the transformer is not continuously changed. Since the power is in direct proportion to the square of the voltage, when the on-load voltage regulation gear of the transformer is regulated, a power jump change is caused, the change causes certain impact on a power grid, and when the capacity of the power grid is smaller, the impact often exceeds an allowable limit value.
It is to be noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the present disclosure, and thus may include information that does not constitute prior art known to those of ordinary skill in the art.
Disclosure of Invention
The invention aims to provide a power control method and a power control device of a submerged arc electric furnace, which realize smooth regulation of the power of the submerged arc electric furnace in the climbing and descending processes by innovatively proposing optimal linkage of electrode lifting and voltage gear lifting, thereby overcoming the problems of power jump change and power grid impact in the power regulation process of the submerged arc electric furnace caused by the limitation and defect of the related technology.
According to a first aspect of the disclosed embodiments, there is provided a submerged arc electric furnace power control method, comprising: acquiring a target power change curve and power adjusting parameters, wherein the power adjusting parameters comprise resistance adjusting parameters and voltage adjusting parameters; determining a current power formula with variable parameters according to the power adjusting parameters; determining the parameter of the current power formula according to the minimum value of the difference between the target power change curve and the current power formula in the current regulation time period; determining a resistance adjustment value and a voltage adjustment value in the current adjustment time period according to parameters of the current power formula; and adjusting the power of the arc-buried electric furnace in the current time period according to the resistance adjusting value and the voltage adjusting value.
In an exemplary embodiment of the present disclosure, determining the current power formula with variable parameters according to the power adjustment parameter includes:
wherein k is a regulation order and is an integer greater than or equal to 0, Δ T is a time interval of each regulation, U (k Δ T) is the current power in the kth regulation period, U (k Δ T) is the initial voltage of the kth regulation period, R (k Δ T) is the initial resistance of the kth regulation period, and k3 and k4 are both variable parameters, wherein k3 ∈ [ -1, 0, 1], k4 ∈ [ -1, 0, 1 ].
In an exemplary embodiment of the present disclosure, determining the parameter of the current power formula according to a minimum value of a difference between the target power variation curve and the current power formula within the current adjustment period includes: determining the minimum difference value between the target power change curve and the current power formula in the current regulation time period; and determining a k3 value and a k4 value corresponding to the current adjusting time period according to the current power formula corresponding to the minimum value of the difference value.
In one exemplary embodiment of the present disclosure, determining the resistance adjustment value and the voltage adjustment value for the current adjustment period according to the parameters of the current power formula includes: when k3 is equal to-1 and U (k delta T) -delta U is not less than the voltage regulation minimum value, the first gear voltage is adjusted downwards; when k3 is equal to 1 and U (k delta T) + delta U is not greater than the maximum voltage regulation value, the first gear voltage is adjusted upwards; when k4 is equal to-1 and R (k delta T) -delta R is not less than the resistance adjustment minimum value, the first-gear resistance is adjusted downwards; when k4 is equal to 1 and R (k Δ T) + Δ R is not greater than the resistance adjustment maximum, the first-shift resistance is adjusted upward.
In an exemplary embodiment of the present disclosure, the target power variation curve includes:
Pset(kΔT)＝k1(1±k2·e-kT)
wherein k is an adjustment order of not less thanAn integer of 0; Δ T is the time interval for each adjustment; pset(k Δ T) is the set target power in the kth regulation period; k1 and k2 are variable parameters, respectively, k1 is determined by the magnitude of the power change, and k2 is determined by the rate of the power change.
In an exemplary embodiment of the present disclosure, the resistance adjustment parameters include a resistance adjustment maximum value, a resistance adjustment minimum value, and a resistance adjustment step size; the voltage regulation parameters include a voltage regulation maximum, a voltage regulation minimum, and a voltage regulation step.
In an exemplary embodiment of the present disclosure, adjusting the power of the submerged arc electric furnace for the present period of time according to the resistance adjustment value and the voltage adjustment value includes: adjusting the position of the electrode according to the voltage adjustment value; adjusting the gear of the on-load voltage regulating switch according to the resistance regulating value; and the position of the regulating electrode and the gear of the on-load tap changer are kept unchanged in the current regulating time period, and the voltage regulating value and the resistance regulating value are redetermined when the next regulating time period is started.
According to a second aspect of the embodiments of the present disclosure, there is provided a submerged arc electric furnace power control apparatus including: the condition acquisition module is used for acquiring a target power change curve and power adjusting parameters, wherein the power adjusting parameters comprise resistance adjusting parameters and voltage adjusting parameters; a formula determination module configured to determine a current power formula with variable parameters according to the power adjustment parameters; the parameter determining module is set to determine the parameter of the current power formula according to the minimum value of the difference between the target power change curve and the current power formula in the current adjusting time period; a scheme determination module configured to determine a resistance adjustment value and a voltage adjustment value within a current adjustment period according to parameters of a current power formula; and the power adjusting module is set to adjust the power of the electric furnace with the embedded arc in the current time period according to the resistance adjusting value and the voltage adjusting value.
According to a third aspect of the present disclosure, there is provided an electronic device comprising: a memory; and a processor coupled to the memory, the processor configured to perform a method as in any above based on instructions stored in the memory.
According to a fourth aspect of the present disclosure, there is provided a computer-readable storage medium having a program stored thereon, the program, when executed by a processor, implementing the submerged arc furnace power control method as in any one of the above.
According to the power control method of the submerged arc electric furnace provided by the embodiment of the disclosure, by calculating the minimum difference between the current power formula and the smooth target power change curve in the current adjustment time period, the voltage control value and the resistance control value which enable the current power to be closest to the target power corresponding to the current time period can be determined, and then the voltage and the resistance can be adjusted simultaneously, so that the smooth change of the power can be realized, the impact of the power change on a power grid can be avoided, and the safety of the power control process of the submerged arc electric furnace can be effectively improved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure. It is to be understood that the drawings in the following description are merely exemplary of the disclosure, and that other drawings may be derived from those drawings by one of ordinary skill in the art without the exercise of inventive faculty.
Fig. 1 is a flow chart of a method of power control of a submerged arc furnace in an exemplary embodiment of the disclosure.
Fig. 2 is a flow chart of a submerged arc furnace power control process in one embodiment of the present disclosure.
Fig. 3 is a flow chart of a submerged arc furnace power control process in another embodiment of the present disclosure.
Fig. 4 is a flowchart of a submerged arc furnace power control process in yet another embodiment of the present disclosure.
Fig. 5 is a block diagram of a submerged arc furnace power control apparatus in an exemplary embodiment of the present disclosure.
FIG. 6 is a block diagram of an electronic device in an exemplary embodiment of the present disclosure.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the disclosure. One skilled in the relevant art will recognize, however, that the subject matter of the present disclosure can be practiced without one or more of the specific details, or with other methods, components, devices, steps, and the like. In other instances, well-known technical solutions have not been shown or described in detail to avoid obscuring aspects of the present disclosure.
Further, the drawings are merely schematic illustrations of the present disclosure, in which the same reference numerals denote the same or similar parts, and thus, a repetitive description thereof will be omitted. Some of the block diagrams shown in the figures are functional entities and do not necessarily correspond to physically or logically separate entities. These functional entities may be implemented in the form of software, or in one or more hardware modules or integrated circuits, or in different networks and/or processor devices and/or microcontroller devices.
The following detailed description of exemplary embodiments of the disclosure refers to the accompanying drawings.
Fig. 1 schematically shows a flow chart of a submerged arc furnace power control method in an exemplary embodiment of the present disclosure. Referring to fig. 1, a submerged arc furnace power control method 100 may include:
step S102, obtaining a target power change curve and power adjusting parameters, wherein the power adjusting parameters comprise resistance adjusting parameters and voltage adjusting parameters;
step S104, determining a current power formula with variable parameters according to the power adjusting parameters;
step S106, determining the parameter of the current power formula according to the minimum value of the difference between the target power change curve and the current power formula in the current regulation time period;
step S108, determining a resistance adjusting value and a voltage adjusting value in the current adjusting time period according to the parameters of the current power formula;
and S110, adjusting the power of the electric arc furnace in the current time period according to the resistance adjusting value and the voltage adjusting value.
According to the power control method of the submerged arc electric furnace provided by the embodiment of the disclosure, by calculating the minimum difference between the current power formula and the smooth target power change curve in the current adjustment time period, the voltage control value and the resistance control value which enable the current power to be closest to the target power corresponding to the current time period can be determined, and then the voltage and the resistance can be adjusted simultaneously, so that the smooth change of the power can be realized, the impact of the power change on a power grid can be avoided, and the safety of the power control process of the submerged arc electric furnace can be effectively improved.
The steps of the submerged arc furnace power control method 100 will be described in detail below.
In step S102, a target power variation curve and power adjustment parameters are obtained, the power adjustment parameters include a resistance adjustment parameter and a voltage adjustment parameter, and the target power variation curve is a smooth curve.
In the disclosed embodiment, the smoothed target power curve may be set as the following formula:
Pset(kΔT)＝k1(1±k2·e-kT)……………………(1)
wherein k is an adjustment order and is an integer greater than or equal to 0; Δ T is the time interval for each adjustment; pset(k Δ T) is the set target power in the kth regulation period; k1 and k2 are variable parameters, respectively, k1 is determined by the magnitude of the power change, and k2 is determined by the rate of the power change.
The skilled person can set the values of k1 and k2 according to the actual requirement to adjust the form of the target power curve; in other embodiments of the present disclosure, the target power curve may also be represented by other formulas, which are not particularly limited by the present disclosure.
Unlike the related art, the disclosed embodiments simultaneously adjust the voltage and the resistance to achieve a smooth change in power. Thus, in embodiments of the present disclosure, the power regulation parameter may include a resistance regulation parameter and a voltage regulation parameter. The resistance adjusting parameters can include a resistance adjusting maximum value Rmax, a resistance adjusting minimum value Rmin and a resistance adjusting step length delta R; the voltage regulation parameters comprise a voltage regulation maximum value Umax, a voltage regulation minimum value Umin and a voltage regulation step length delta U. The impedance adjusting interval [ R ] can be set according to the ideal operation position of the electrodemin,Rmax]And a resistance regulation step length delta R, determining a voltage regulation interval [ U ] according to the gear rated value of the on-load tap-changing transformermin,Umax]And a voltage adjustment step size Δ U.
The power adjusting parameters can be determined according to the actual operation condition of the submerged arc electric furnace.
In step S104, a current power formula with variable parameters is determined according to the power adjustment parameters.
In the disclosed embodiment, the current power formula may be set to the following form:
wherein k is a regulation order and is an integer greater than or equal to 0, Δ T is a time interval of each regulation, U (k Δ T) is the current power in the kth regulation period, U (k Δ T) is the initial voltage of the kth regulation period, R (k Δ T) is the initial resistance of the kth regulation period, and k3 and k4 are both variable parameters, wherein k3 ∈ [ -1, 0, 1], k4 ∈ [ -1, 0, 1 ].
When k is 0, i.e., initial adjustment, U (k Δ T) is the set initial voltage U (0), and R (k Δ T) is the set initial resistance R (0). The initial voltage and the initial resistance can be determined according to actual working conditions.
In step S106, a parameter of the current power formula is determined according to a minimum value of a difference between the target power variation curve and the current power formula in the current adjustment period.
When the target power variation curves P are respectively expressed by the formulas (1) and (2)set(kT) and the current power formula U (k Δ T), it may first be determined that the target power profile P is present during the current regulation periodset(kT) minimum difference from current power formula U (k Δ T):
min[Pset(kΔT)-U(kΔT)]……………………(3)
that is to say that the first and second electrodes,
wherein, k3 ∈ [ -1, 0, 1], k4 ∈ [ -1, 0, 1 ].
Then, according to the current power formula corresponding to the minimum value of the difference value, the k3 value and the k4 value corresponding to the current adjusting time period are determined.
In step S108, a resistance adjustment value and a voltage adjustment value in the current adjustment period are determined according to the parameters of the current power formula.
Illustratively, in determining the values of k3 and k4 using equation (4), the resistance adjustment value and the voltage adjustment value are determined in the following manner:
the gear of the load tap changer is adjusted according to the value of k3, wherein k3 is equal to-1, and U (kT) -delta U>UminWhen the voltage is lower, the first gear voltage is adjusted downwards; 1 at k3, and U (kt) + Δ U<UmaxWhen the voltage is higher than the first-gear voltage, the first-gear voltage is adjusted; and otherwise, the gear of the on-load tap changer is kept unchanged.
Adjusting the electrode position according to the value of k4, at k4 ═ -1, and R (kt) - Δ R>RminWhen the resistance is reduced, the step-down resistance is adjusted (the resistance is reduced by delta R); at k4 ═ 1, and R (kt) +. Δ R<RmaxWhile the first shift resistor is being adjusted up (impedance increases Δ R), otherwise the electrode position is maintained.
And in step S110, adjusting the power of the electric furnace for the buried arc in the current time period according to the resistance adjustment value and the voltage adjustment value.
In some embodiments, the power of the submerged arc furnace can be adjusted by adjusting the position of the electrode according to the voltage adjusting value and adjusting the gear of the on-load tap changer according to the resistance adjusting value. And when the next adjustment period is entered, re-determining the voltage adjustment value and the resistance adjustment value, and circularly executing the steps S106 to S110 until the adjustment is finished.
Fig. 2 is a schematic diagram of a power control process for a submerged arc furnace in one embodiment of the present disclosure.
Referring to fig. 2, assuming a total of N adjustment periods (N is an integer of 1 or more), the submerged arc furnace power control process 200 may include:
in step S21, a target power variation curve is set. Wherein the target power variation curve may be in the form of the above equation (1).
In step S22, an electrode impedance adjustment interval and a voltage adjustment interval are set. The electrode impedance adjusting part can be determined according to the electrode embedding depth, and the voltage adjusting interval can be determined together with the electrode impedance adjusting interval according to the power adjusting requirement.
It is understood that step S22 may also include determining a resistance adjustment step size and a voltage adjustment step size.
In step S23, optimal tuning parameters k3 and k4 are determined.
The value of k3 and the value of k4 that minimize the difference between the current power value (u (kt)) and the target power (pset (kt)) corresponding to the current adjustment period may be determined according to the initial voltage value and the initial resistance value of the kth adjustment period, and formulas (1) to (4).
And step S24, adjusting the electrode position and the on-load tap changer gear.
The electrode position, i.e. the voltage, can be adjusted according to the value of k 3; and adjusting the gear position of the on-load tap changer according to the value of k 4. The detailed adjustment logic can be referred to the above step S108, and the disclosure is not repeated herein.
Step S25, keeping the electrode position and the on-load tap changer position constant during the current adjustment period (Δ T time).
Step S26, determining whether k is equal to N, if not, proceeding to step S27 to add 1 to k, and re-proceeding to step S23 to determine the value of k3 and the value of k4 in the next adjustment period; if so, the power adjustment process is ended.
The embodiment shown in fig. 2 can adjust power according to the actual voltage condition and the actual resistance condition at the beginning of each adjustment period, so that control is more accurate, and the impact of power change on a power grid can be effectively reduced.
The embodiment shown in fig. 2 may be applied not only to power regulation for a limited number of regulation periods, but also to real-time operation to achieve an infinite number of power regulations.
Referring to fig. 3, in one embodiment of the present disclosure, a submerged arc furnace power control process 300 may include:
in step S31, a target power variation curve is set.
Step S32, an electrode impedance adjustment interval, a voltage adjustment interval, a resistance adjustment step size, and a voltage adjustment step size are set.
In step S33, optimal tuning parameters k3 and k4 are determined.
And step S34, adjusting the electrode position and the on-load tap changer gear.
Step S35, keeping the electrode position and the on-load tap changer position constant during the current adjustment period (Δ T time).
The specific implementation of steps S31 to S35 is described in detail in steps S21 to S25, and this disclosure is not repeated herein.
After the step S35 is finished, without determining the end condition, the process proceeds directly to step S36 to add 1 to k, the process proceeds to the next adjustment period, and the process returns to step S33 to determine the resistance adjustment value and the voltage adjustment value in the next adjustment period, and the steps S33 to S35 are executed in a loop until the power adjustment process is finished passively (for example, the system is shut down).
The embodiment shown in fig. 3 does not need to set the ending condition in advance, and can be applied to the working conditions where the ending condition cannot be judged.
In another embodiment of the present disclosure, the voltage initial value and the resistance initial value may be determined according to the operating condition, then the resistance adjustment value and the voltage adjustment value corresponding to each adjustment time period are determined at one time, and the power adjustment is performed directly according to the set resistance adjustment value and the set voltage adjustment value when the power adjustment is performed.
Fig. 4 is a schematic diagram of a power control process for a submerged arc furnace in another embodiment of the present disclosure.
Referring to fig. 4, assuming a total of N adjustment periods (N is an integer of 1 or more), the submerged arc furnace power control process 400 may include:
in step S41, a target power variation curve is set. The target power variation curve may be in the form of equation (1).
Step S42, determining an electrode impedance adjusting interval, a voltage adjusting interval, a resistance adjusting step length and a voltage adjusting step length;
step S43, determining a resistance initial value and a voltage initial value;
step S44, determining a resistance adjustment value and a voltage adjustment value corresponding to each adjustment time interval in N adjustment time intervals;
and step S45, when each adjusting time interval begins, the electrode position is adjusted according to the resistance adjusting value corresponding to the adjusting time interval, and the on-load tap changer gear is adjusted according to the voltage adjusting value corresponding to the adjusting time interval.
The embodiment shown in fig. 4 does not need to execute an operation process in the adjustment process, so that the configuration requirement on the system can be reduced, and the cost can be reduced.
Corresponding to the method embodiment, the disclosure also provides a power control device of the submerged arc electric furnace, which can be used for executing the method embodiment.
Fig. 5 schematically shows a block diagram of a power control apparatus for a submerged arc electric furnace in an exemplary embodiment of the present disclosure.
Referring to fig. 5, the submerged arc electric furnace power control apparatus 500 may include:
a condition obtaining module 502 configured to obtain a target power variation curve and power adjustment parameters, where the power adjustment parameters include a resistance adjustment parameter and a voltage adjustment parameter;
a formula determination module 504 configured to determine a current power formula with variable parameters according to the power adjustment parameters;
a parameter determination module 506 configured to determine a parameter of the current power formula according to a minimum value of a difference between the target power variation curve and the current power formula within a current adjustment period;
a scheme determination module 508 configured to determine a resistance adjustment value and a voltage adjustment value within a current adjustment period according to parameters of a current power formula;
and the power adjusting module 510 is configured to adjust the power of the electric furnace in the current time period according to the resistance adjusting value and the voltage adjusting value.
In an exemplary embodiment of the present disclosure, the formula determination module 504 is configured to determine the current power formula according to the following formula:
wherein k is a regulation order and is an integer greater than or equal to 0, Δ T is a time interval of each regulation, U (k Δ T) is the current power in the kth regulation period, U (k Δ T) is the initial voltage of the kth regulation period, R (k Δ T) is the initial resistance of the kth regulation period, and k3 and k4 are both variable parameters, wherein k3 ∈ [ -1, 0, 1], k4 ∈ [ -1, 0, 1 ].
In an exemplary embodiment of the disclosure, the parameter determination module 506 is configured to: determining the minimum difference value between the target power change curve and the current power formula in the current regulation time period; and determining a k3 value and a k4 value corresponding to the current adjusting time period according to the current power formula corresponding to the minimum value of the difference value.
In an exemplary embodiment of the disclosure, the scenario determination module 508 is configured to: when k3 is equal to-1 and R (k delta T) -delta R is not less than the voltage regulation minimum value, the first gear voltage is adjusted downwards; when k3 is equal to 1 and R (k delta T) + delta R is not greater than the maximum voltage regulation value, the first gear voltage is adjusted upwards; when k4 is equal to-1 and R (k delta T) -delta R is not less than the resistance adjustment minimum value, the first-gear resistance is adjusted downwards; when k4 is equal to 1 and R (k Δ T) + Δ R is not greater than the resistance adjustment maximum, the first-shift resistance is adjusted upward.
In an exemplary embodiment of the present disclosure, the target power variation curve includes:
Pset(kΔT)＝k1(1±k2·e-kT)
wherein k is an adjustment order and is an integer greater than or equal to 0; Δ T is at each adjustmentSpacing; pset(k Δ T) is the set target power in the kth regulation period; k1 and k2 are variable parameters, respectively, k1 is determined by the magnitude of the power change, and k2 is determined by the rate of the power change.
In an exemplary embodiment of the present disclosure, the resistance adjustment parameters include a resistance adjustment maximum value, a resistance adjustment minimum value, and a resistance adjustment step size; the voltage regulation parameters include a voltage regulation maximum, a voltage regulation minimum, and a voltage regulation step.
In an exemplary embodiment of the present disclosure, the power adjustment module 510 is configured to: adjusting the position of the electrode according to the voltage adjustment value; adjusting the gear of the on-load voltage regulating switch according to the resistance regulating value; and the position of the regulating electrode and the gear of the on-load tap changer are kept unchanged in the current regulating time period, and the voltage regulating value and the resistance regulating value are redetermined when the next regulating time period is started.
Since the functions of the apparatus 500 have been described in detail in the corresponding method embodiments, the disclosure is not repeated herein.
It should be noted that although in the above detailed description several modules or units of the device for action execution are mentioned, such a division is not mandatory. Indeed, the features and functionality of two or more modules or units described above may be embodied in one module or unit, according to embodiments of the present disclosure. Conversely, the features and functions of one module or unit described above may be further divided into embodiments by a plurality of modules or units.
In an exemplary embodiment of the present disclosure, an electronic device capable of implementing the above method is also provided.
As will be appreciated by one skilled in the art, aspects of the present invention may be embodied as a system, method or program product. Thus, various aspects of the invention may be embodied in the form of: an entirely hardware embodiment, an entirely software embodiment (including firmware, microcode, etc.) or an embodiment combining hardware and software aspects that may all generally be referred to herein as a "circuit," module "or" system.
An electronic device 600 according to this embodiment of the invention is described below with reference to fig. 6. The electronic device 600 shown in fig. 6 is only an example, and should not bring any limitation to the functions and the scope of use of the embodiments of the present invention.
As shown in fig. 6, the electronic device 600 is embodied in the form of a general purpose computing device. The components of the electronic device 600 may include, but are not limited to: the at least one processing unit 610, the at least one memory unit 620, and a bus 630 that couples the various system components including the memory unit 620 and the processing unit 610.
Where the memory unit stores program code, the program code may be executed by the processing unit 610 such that the processing unit 610 performs the steps according to various exemplary embodiments of the present invention as described in the above-mentioned "exemplary methods" section of this specification. For example, the processing unit 610 may perform steps S102 to S110 as illustrated in fig. 1.
The storage unit 620 may include readable media in the form of volatile memory units, such as a random access memory unit (RAM)6201 and/or a cache memory unit 6202, and may further include a read-only memory unit (ROM) 6203.
The memory unit 620 may also include a program/utility 6204 having a set (at least one) of program modules 6205, such program modules 6205 including, but not limited to: an operating system, one or more application programs, other program modules, and program data, each of which, or some combination thereof, may comprise an implementation of a network environment.
Through the above description of the embodiments, those skilled in the art will readily understand that the exemplary embodiments described herein may be implemented by software, or by software in combination with necessary hardware. Therefore, the technical solution according to the embodiments of the present disclosure may be embodied in the form of a software product, which may be stored in a non-volatile storage medium (which may be a CD-ROM, a usb disk, a removable hard disk, etc.) or on a network, and includes several instructions to enable a computing device (which may be a personal computer, a server, a terminal device, or a network device, etc.) to execute the method according to the embodiments of the present disclosure.
In an exemplary embodiment of the present disclosure, there is also provided a computer-readable storage medium having stored thereon a program product capable of implementing the above-described method of the present specification. In some possible embodiments, aspects of the invention may also be implemented in the form of a program product comprising program code means for causing a terminal device to carry out the steps according to various exemplary embodiments of the invention described in the above-mentioned "exemplary methods" section of the present description, when the program product is run on the terminal device.
The program product for implementing the above method according to an embodiment of the present invention may employ a portable compact disc read only memory (CD-ROM) and include program codes, and may be run on a terminal device, such as a personal computer. However, the program product of the present invention is not limited in this regard and, in the present document, a readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
The program product may employ any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. A readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the readable storage medium include: an electrical connection having one or more wires, a portable disk, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
A computer readable signal medium may include a propagated data signal with readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take many forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A readable signal medium may also be any readable medium that is not a readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.
Program code embodied on a readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.
Program code for carrying out operations of the present invention may be written in any combination of one or more programming languages, including AN object oriented programming language such as Java, C + +, or the like, as well as conventional procedural programming languages, such as the "C" language or similar programming languages.
Furthermore, the above-described figures are merely schematic illustrations of processes involved in methods according to exemplary embodiments of the invention, and are not intended to be limiting. It will be readily understood that the processes shown in the above figures are not intended to indicate or limit the chronological order of the processes. In addition, it is also readily understood that these processes may be performed synchronously or asynchronously, e.g., in multiple modules.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
Claims (10)
1. A power control method of a submerged arc electric furnace is characterized by comprising the following steps:
acquiring a target power change curve and power adjusting parameters, wherein the power adjusting parameters comprise resistance adjusting parameters and voltage adjusting parameters, and the target power change curve is a smooth curve;
determining a current power formula with variable parameters according to the power adjusting parameters;
determining parameters of the current power formula according to the minimum value of the difference between the target power change curve and the current power formula in the current adjustment time period;
determining a resistance adjustment value and a voltage adjustment value in the current adjustment period according to parameters of the current power formula;
and adjusting the power of the submerged arc electric furnace in the current time period according to the resistance adjustment value and the voltage adjustment value.
2. The submerged arc furnace power control method of claim 1, wherein the determining a parameter-variable current power formula from the power adjustment parameters comprises:
wherein k is a regulation order and is an integer greater than or equal to 0, Δ T is a time interval of each regulation, U (k Δ T) is the current power in the kth regulation period, U (k Δ T) is the initial voltage of the kth regulation period, R (k Δ T) is the initial resistance of the kth regulation period, and k3 and k4 are both variable parameters, wherein k3 ∈ [ -1, 0, 1], k4 ∈ [ -1, 0, 1 ].
3. The submerged arc furnace power control method of claim 2, wherein the determining the parameter of the current power formula according to the minimum value of the difference between the target power variation curve and the current power formula in the current adjustment period comprises:
determining the minimum difference value between the target power change curve and the current power formula in the current adjusting time period;
and determining a k3 value and a k4 value corresponding to the current adjusting time period according to the current power formula corresponding to the minimum value of the difference value.
4. The submerged arc furnace power control method of claim 3, wherein the determining a resistance adjustment value and a voltage adjustment value for the current adjustment period according to the parameters of the current power formula comprises:
when k3 is equal to-1 and U (k delta T) -delta U is not less than the voltage regulation minimum value, the first gear voltage is adjusted downwards;
when k3 is equal to 1 and U (k delta T) + delta U is not greater than the maximum voltage regulation value, the first gear voltage is adjusted upwards;
when k4 is equal to-1 and R (k delta T) -delta R is not less than the resistance adjustment minimum value, the first-gear resistance is adjusted downwards;
when k4 is equal to 1 and R (k Δ T) + Δ R is not greater than the resistance adjustment maximum, the first-shift resistance is adjusted upward.
5. The submerged arc furnace power control method according to any one of claims 1 to 4, characterized in that the target power variation curve comprises:
Pset(kΔT)＝k1(1±k2·e-kT)
wherein k is an adjustment order and is an integer greater than or equal to 0; Δ T is the time interval for each adjustment; pset(k Δ T) is the set target power in the kth regulation period; k1 and k2 are variable parameters, respectively, k1 is determined by the magnitude of the power change, and k2 is determined by the rate of the power change.
6. The submerged arc furnace power control method according to any one of claims 1 to 4, characterized in that the resistance adjustment parameters comprise a resistance adjustment maximum value, a resistance adjustment minimum value and a resistance adjustment step length; the voltage regulation parameters comprise a voltage regulation maximum value, a voltage regulation minimum value and a voltage regulation step length.
7. The submerged arc electric furnace power control method according to claim 1, wherein the adjusting the power of the submerged arc electric furnace in the current period according to the resistance adjustment value and the voltage adjustment value comprises:
adjusting the position of the electrode according to the voltage adjustment value;
adjusting the gear of the on-load voltage regulating switch according to the resistance adjusting value;
and the position of the adjusting electrode and the gear of the on-load tap changer are kept unchanged in the current adjusting period, and the voltage adjusting value and the resistance adjusting value are re-determined when the next adjusting period is started.
8. A submerged arc furnace power control device, characterized by comprising:
the device comprises a condition acquisition module, a power regulation module and a power regulation module, wherein the condition acquisition module is used for acquiring a target power change curve and power regulation parameters, and the power regulation parameters comprise resistance regulation parameters and voltage regulation parameters;
a formula determination module configured to determine a current power formula with variable parameters according to the power adjustment parameter;
a parameter determination module configured to determine a parameter of the current power formula according to a minimum value of a difference between the target power variation curve and the current power formula within a current adjustment period;
a scheme determination module configured to determine a resistance adjustment value and a voltage adjustment value within the current adjustment period based on parameters of the current power formula;
and the power adjusting module is set to adjust the power of the submerged arc electric furnace in the current time period according to the resistance adjusting value and the voltage adjusting value.
9. An electronic device, comprising:
a memory; and
a processor coupled to the memory, the processor configured to perform the method of submerged arc furnace power control of any of claims 1-7 based on instructions stored in the memory.
10. A computer readable storage medium, having stored thereon a program which, when being executed by a processor, carries out the submerged arc furnace power control method according to any one of claims 1 to 7.
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