CN113295950A - Method and device for determining active arc extinction control parameters and storage medium - Google Patents
Method and device for determining active arc extinction control parameters and storage medium Download PDFInfo
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Abstract
According to the method, the device and the storage medium for determining the active arc extinction control parameter, the first alternating current signal and the second alternating current signal with different frequencies and different amplitudes are respectively injected into the opening triangle side of the voltage transformer, the first voltage signal corresponding to the first alternating current signal and the second voltage signal corresponding to the second alternating current signal returned from the opening triangle side of the voltage transformer are received, and the active arc extinction control parameter can be determined by utilizing the first alternating current signal, the first voltage signal, the second alternating current signal and the second voltage signal.
Description
Technical Field
The invention relates to the technical field of power distribution networks, in particular to a method and a device for determining an active arc extinction control parameter, a storage medium and computer equipment.
Background
The arc extinction means that when the single-phase metal grounding occurs on the bus, the arc extinction device acts, so that the metal grounding is directly grounded through the vacuum contactor which acts through the arc extinction device, the bus protection action is facilitated, and the generation of harmonic waves can be avoided. However, as power electronic equipment and nonlinear loads in a power distribution network are more and more, the proportion of harmonic content in the grounding fault current is more and more, so that the fault current cannot be completely compensated by the arc suppression coil, and an active arc suppression technology is introduced, and the active arc suppression technology compensates the fault current by injecting reverse current into the grounding transformer, so that an arc suppression effect is achieved.
When the existing active arc suppression technology is applied practically, a variable frequency or variable amplitude value signal is loaded from the secondary side of a voltage transformer, the secondary side voltage and current information of the voltage transformer is detected and analyzed, and then the magnitude of the injected reverse current is calculated. However, when the amplitude-variable signal or the frequency-variable signal is used for detection, the amplitude or the frequency needs to be adjusted for many times, the operation process is complicated, the magnitude of the injected reverse current cannot be determined quickly and accurately, and accordingly arc extinction control responsiveness is low.
Disclosure of Invention
The invention aims to solve at least one of the technical defects, in particular to the technical defect that the arc extinction control responsiveness is low due to the fact that the amplitude or the frequency needs to be adjusted for many times when amplitude-variable signals or frequency-variable signals are used for detection in the prior art, the operation process is complicated, and the magnitude of injected reverse current cannot be determined quickly and accurately.
The invention provides a method for determining an active arc extinction control parameter, which comprises the following steps:
determining a first alternating current signal and a second alternating current signal, wherein the frequency and the amplitude of the first alternating current signal are different from those of the second alternating current signal;
injecting the first alternating current signal and the second alternating current signal into the open triangle side of the voltage transformer respectively;
receiving a first voltage signal corresponding to the first alternating current signal and a second voltage signal corresponding to the second alternating current signal, which are returned from the triangular opening side of the voltage transformer;
and determining an active arc suppression control parameter according to the first alternating current signal, the first voltage signal, the second alternating current signal and the second voltage signal.
Optionally, before the step of injecting the first ac signal and the second ac signal into the open triangle side of the voltage transformer, the method further includes:
determining a first inductance value of an auxiliary inductor, the auxiliary inductor being connected in series with the open-delta side of the voltage transformer for controlling the injected first and second ac signals.
Optionally, the step of determining an active arc suppression control parameter according to the first ac signal, the first voltage signal, the second ac signal, and the second voltage signal includes:
determining a current error coefficient according to the first alternating current signal, the first voltage signal, the second alternating current signal and the second voltage signal;
under the condition that the current error coefficient meets a preset error coefficient threshold value, acquiring bus voltage and a winding ratio of the voltage transformer;
and determining an active arc suppression control parameter according to the bus voltage, the winding ratio of the voltage transformer, the first inductance value, the first alternating current signal, the first voltage signal, the second alternating current signal and the second voltage signal.
Optionally, the method for determining an active arc suppression control parameter further includes:
and under the condition that the current error coefficient does not meet a preset error coefficient threshold value, determining a second inductance value of the auxiliary inductor according to the first inductance value, the current error coefficient and the preset error coefficient threshold value.
Optionally, in a case that the current error coefficient does not satisfy a preset error coefficient threshold, the method further includes:
and determining a third alternating current signal, wherein the frequency and the amplitude of the third alternating current signal are different from those of the first alternating current signal and the second alternating current signal.
Optionally, the method for determining an active arc suppression control parameter further includes:
injecting the third AC signal into an open side of the voltage transformer;
and receiving a third voltage signal corresponding to the third alternating current signal returned by the opening triangle side of the voltage transformer.
Optionally, the method for determining an active arc suppression control parameter further includes:
acquiring the bus voltage and the winding ratio of the voltage transformer;
and re-determining the active arc suppression control parameter according to the bus voltage, the winding ratio of the voltage transformer, the second inductance value, the first alternating current signal, the first voltage signal, the second alternating current signal, the second voltage signal, the third alternating current signal and the third voltage signal.
The invention also provides a device for determining the active arc extinction control parameters, which comprises the following components:
the signal determination module is used for determining a first alternating current signal and a second alternating current signal, wherein the frequency and the amplitude of the first alternating current signal are different from those of the second alternating current signal;
the signal injection module is used for respectively injecting the first alternating current signal and the second alternating current signal to the open triangle side of the voltage transformer;
the signal receiving module is used for receiving a first voltage signal corresponding to the first alternating current signal and a second voltage signal corresponding to the second alternating current signal, wherein the first voltage signal is returned from the triangular opening side of the voltage transformer;
and the parameter determining module is used for determining an active arc suppression control parameter according to the first alternating current signal, the first voltage signal, the second alternating current signal and the second voltage signal.
The present invention also provides a storage medium having stored therein computer readable instructions which, when executed by one or more processors, cause the one or more processors to perform the steps of the method of determining an active arc suppression control parameter as described in any of the above embodiments.
The present invention also provides a computer device having computer readable instructions stored therein, which when executed by one or more processors, cause the one or more processors to perform the steps of the method of determining an active arc suppression control parameter as described in any of the above embodiments.
According to the technical scheme, the embodiment of the invention has the following advantages:
according to the method, the device and the storage medium for determining the active arc extinction control parameter, the first alternating current signal and the second alternating current signal with different frequencies and different amplitudes are respectively injected into the opening triangle side of the voltage transformer, the first voltage signal corresponding to the first alternating current signal and the second voltage signal corresponding to the second alternating current signal returned from the opening triangle side of the voltage transformer are received, and the active arc extinction control parameter can be determined by utilizing the first alternating current signal, the first voltage signal, the second alternating current signal and the second voltage signal.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a schematic flowchart of a method for determining an active arc suppression control parameter according to an embodiment of the present invention;
fig. 2 is a schematic circuit structure diagram of a voltage transformer according to an embodiment of the present invention;
fig. 3 is a scene diagram of a specific application of the arc suppression coil grounding system fault line selection method provided in the embodiment of the present invention;
fig. 4 is a schematic operation flow chart for determining an active arc suppression control parameter according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of an apparatus for determining an active arc suppression control parameter according to an embodiment of the present invention;
fig. 6 is a schematic internal structural diagram of a computer device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The arc extinction means that when the single-phase metal grounding occurs on the bus, the arc extinction device acts, so that the metal grounding is directly grounded through the vacuum contactor which acts through the arc extinction device, the bus protection action is facilitated, and the generation of harmonic waves can be avoided. However, as power electronic equipment and nonlinear loads in a power distribution network are more and more, the proportion of harmonic content in the grounding fault current is more and more, so that the fault current cannot be completely compensated by the arc suppression coil, and an active arc suppression technology is introduced, and the active arc suppression technology compensates the fault current by injecting reverse current into the grounding transformer, so that an arc suppression effect is achieved.
When the existing active arc suppression technology is applied practically, a variable frequency or variable amplitude value signal is loaded from the secondary side of a voltage transformer, the secondary side voltage and current information of the voltage transformer is detected and analyzed, and then the magnitude of the injected reverse current is calculated. However, when the amplitude-variable signal or the frequency-variable signal is used for detection, the amplitude or the frequency needs to be adjusted for many times, the operation process is complicated, the magnitude of the injected reverse current cannot be determined quickly and accurately, and accordingly arc extinction control responsiveness is low.
The invention aims to solve the technical problems that the amplitude or frequency needs to be adjusted for many times when amplitude-variable signals or frequency-variable signals are used for detection in the prior art, the operation process is complicated, the magnitude of injected reverse current cannot be determined quickly and accurately, and the arc extinction control responsiveness is low, and provides the following technical scheme:
in an embodiment, as shown in fig. 1, fig. 1 is a schematic flowchart of a method for determining an active arc suppression control parameter according to an embodiment of the present invention; the invention provides a method for determining an active arc extinction control parameter, which specifically comprises the following steps:
s110: a first alternating current signal and a second alternating current signal are determined.
In this step, the first ac signal refers to an ac signal having a different frequency and amplitude from the second ac signal, and the ac signal may be injected into the open triangle side of the voltage transformer for analyzing the ground impedance.
It should be noted that, the present application has no special requirement on the frequency and amplitude of the first ac signal and the second ac signal, and the operation is simple, and only the amplitude and the frequency of the first ac signal and the second ac signal need to be different, where the frequency of the first ac signal may form a significant difference with the frequency of the second ac signal, for example, the frequency of the first ac signal is 10Hz, and the frequency of the second ac signal is 50 Hz.
It can be understood that the present application considers the safety of operation and the cost of the device, and the amplitude of the ac signal is generally considered to be in the range of 0.1 to 0.5A, and the frequency is less than 300 Hz.
S120: and injecting the first alternating current signal and the second alternating current signal into the opening triangle side of the voltage transformer respectively.
In this step, after the first ac signal and the second ac signal are determined through step S110, the first ac signal and the second ac signal may be respectively injected to the open triangle side of the voltage transformer so as to transform the voltage in the line through the voltage transformer, and return the transformed voltage signal.
It can be understood that the purpose of transforming voltage by the voltage transformer is mainly to supply power to the measuring instrument and the relay protection device, to measure the voltage, power and electric energy of the line, or to protect the valuable equipment, motor and transformer in the line when the line is in fault, so the capacity of the voltage transformer is very small, generally only a few volt-amperes, tens of volt-amperes, and not more than a thousand volt-amperes at most.
In addition, the order of injecting the first alternating current signal and the second alternating current signal to the open triangle side of the voltage transformer is not limited here.
S130: and the opening triangle side of the receiving voltage transformer returns the first voltage signal and the second voltage signal.
In this step, after the first ac signal and the second ac signal are respectively injected to the open triangle side of the voltage transformer in step S120, the first voltage signal corresponding to the first ac signal and the second voltage signal corresponding to the second ac signal, which are returned from the open triangle side of the voltage transformer, may be received, so that the ground impedance may be analyzed according to the ac signals injected twice and the returned voltage signals, and the active arc extinction control parameter may be determined.
S140: and determining active arc suppression control parameters.
In this step, after receiving the first voltage signal corresponding to the first ac signal and the second voltage signal corresponding to the second ac signal returned from the open triangle side of the voltage transformer in step S130, the active arc suppression control parameter may be determined according to the first ac signal, the first voltage signal, the second ac signal, and the second voltage signal.
Specifically, because the amplitude and the frequency of the first alternating current signal and the second alternating current signal injected to the open triangle side of the voltage transformer are different, after the first alternating current signal and the second alternating current signal are respectively injected to the open triangle side of the voltage transformer, the first voltage signal and the second voltage signal returned by the open triangle side of the voltage transformer can better reflect the voltage of the power transmission line at the moment, and then the first alternating current signal, the first voltage signal, the second alternating current signal and the second voltage signal are combined to determine the active arc suppression control parameter, so that the accuracy of the control parameter can be improved, and the arc suppression control responsivity is good; and moreover, the active arc extinction control parameters can be determined by injecting alternating current signals with different amplitudes and different frequencies twice, so that the operation is simple, and the calculation process is convenient.
The determination method of the active arc suppression control parameter of the present invention is explained in the above embodiments, and is further defined below.
In one embodiment, before the step of injecting the first ac signal and the second ac signal into the open triangle side of the voltage transformer in step S120, the method may further include:
s111: a first inductance value of the auxiliary inductance is determined.
In this embodiment, the auxiliary inductor is connected in series with the open triangle side of the voltage transformer, and is configured to control the injected first ac signal and the second ac signal.
Schematically, as shown in fig. 2, fig. 2 is a schematic circuit structure diagram of a voltage transformer according to an embodiment of the present invention; in FIG. 2, L123Is an open-delta side winding, L, of a voltage transformerABCA primary side winding of the voltage transformer, wherein C is a distributed capacitor of each power distribution line; and n is the winding ratio of the voltage transformer. In order to solve the problem that overvoltage is easy to generate when the injected alternating current signal is large, the auxiliary inductor is connected in series on the side of the opening triangle of the voltage transformer, so that the overvoltage phenomenon is prevented.
It can be understood that the inductance value of the auxiliary inductor can be set according to the grounding parameters of the power distribution system and the actual operation experience, and specifically can be set to 0.2-0.8L.
The above-mentioned embodiment further defines the method for determining the active arc suppression control parameter of the present invention, and the process of determining the active arc suppression control parameter will be described in detail below with reference to the first inductance value of the auxiliary inductance.
In one embodiment, the step of determining an active arc suppression control parameter according to the first ac signal, the first voltage signal, the second ac signal, and the second voltage signal in step S140 may include:
s141: and determining a current error coefficient according to the first alternating current signal, the first voltage signal, the second alternating current signal and the second voltage signal.
S142: and under the condition that the current error coefficient meets a preset error coefficient threshold value, acquiring the bus voltage and the winding ratio of the voltage transformer.
S143: and determining an active arc suppression control parameter according to the bus voltage, the winding ratio of the voltage transformer, the first inductance value, the first alternating current signal, the first voltage signal, the second alternating current signal and the second voltage signal.
In this embodiment, after the first voltage signal corresponding to the first ac signal and the second voltage signal corresponding to the second ac signal are returned from the open triangle side of the voltage transformer, the current error coefficient may be determined according to the first ac signal, the second ac signal, the first voltage signal, and the second voltage signal.
Specifically, a first inductance value L of the auxiliary inductor is setT1Then, the amplitude value i can be injected from the open triangle side of the voltage transformer1Frequency of f1Measuring and recording a first voltage signal u returned by the open triangle side of the voltage transformer (PT)1。
Then injecting the amplitude value i from the opening triangle side of the voltage transformer2Frequency of f2Measuring and recording a second voltage signal u returned from the open triangle side of the PT2(ii) a Then countCalculating the current error coefficient lambda, wherein the calculation formula is as follows:
it should be noted that, since the active arc suppression control parameter is mainly an injected reverse current, the injected reverse current is mainly determined by the bus voltage and the ground impedance, and the bus voltage in the power transmission line remains unchanged, the ground impedance needs to be determined.
After the current error coefficient is obtained, whether the current error coefficient meets a preset error coefficient threshold value needs to be judged, if the current error coefficient is large, the numerical value of the auxiliary inductor cannot provide a good measurement environment after the first inductance value of the auxiliary inductor is connected, and therefore a preset error coefficient threshold value is set to judge whether the current error coefficient is too large, and if the current error coefficient is too large, a new inductance value can be set, so that the current error is reduced.
Further, in the case that the current error coefficient satisfies the preset error coefficient threshold, the winding ratio of the bus voltage and the voltage transformer may be obtained, as shown in fig. 2, between the open-delta side winding and the primary side winding of the voltage transformer in fig. 2, there is a winding ratio.
After the bus voltage and the winding ratio of the voltage transformer are obtained, the active arc suppression control parameter can be determined according to the bus voltage, the winding ratio of the voltage transformer, a first inductance value, a first alternating current signal, a first voltage signal, a second alternating current signal and a second voltage signal, and the specific calculation formula is as follows:
wherein, IarFor injecting reverse current, U is the bus voltage, LT1Is the first inductance value.
The technical effects of the present application are specifically described below by using an example, as shown in fig. 3, fig. 3 is a specific application scenario diagram of a fault line selection method for an arc suppression coil grounding system according to an embodiment of the present invention. As shown in fig. 3, the application scenario is a power distribution network, wherein the rated voltage of the power supply is 110kV, the equivalent impedance of the system side is j4.34 Ω, the neutral point is grounded by using a phase-controlled arc suppression coil, and compensation is put into use immediately after the grounding signal appears. The rated capacity of the main transformer is 40MVA, and the transformation ratio is 110/11. The 10kV bus is provided with 6 feeder lines in total, is an overhead line with the model number of JKLGYJ-1, has the line series impedance of 0.00543+ j0.03425 omega/km and the ground capacitance of 0.434 omega F/km, has the lengths of lines L1-L6 of 10km, 15km, 14km and 12km respectively, and has the line loads of 100kW, 100kW and 100kW respectively.
The single-phase ground capacitance C of the power distribution network is set to be 1F, 6F, 20F, 50F and 100F respectively; the total leakage inductance value converted to the primary side by the voltage transformer is 5H; the amplitudes of alternating current signals injected from the opening triangular side of the voltage transformer are respectively 1A, 1.5A, 2A, 2.5A and 3A, the frequencies are respectively 10Hz, 30Hz, 50Hz, 100 Hz and 150Hz, and the preset error coefficient threshold value is 0.3. When the method is used for calculation, the calculation results of the control parameters of different grounding capacitors are shown in table 1:
TABLE 1
As can be seen from table 1, the method provided by the present application has a wide application range to the grounding capacitor, from 1F to 100F, the relative error between the calculated control parameter and the theoretical parameter is less than 5%, and the accuracy is high, whereas the error is significantly increased by more than 10% in the case of a small capacitor or a large capacitor in the conventional method.
Furthermore, the value range of the preset error coefficient threshold in the application can be 0.2-0.35. For example, when the ground capacitance is 100F, the preset error coefficient thresholds are set to be 0.1, 0.2, 0.3, and 0.4, respectively, and corresponding control parameters are calculated, as shown in table 2:
as can be seen from table 2, when the ground capacitance is 100F, the current error coefficient is calculated and compared with the preset error coefficient threshold after the first alternating current signal and the second alternating current signal are injected, and when the preset error coefficient threshold is 0.3 or 0.4, the current error coefficient meets the requirement, the control parameter is directly calculated; when the preset error coefficient threshold values are 0.1 and 0.2, since the current error coefficient does not satisfy the constraint condition, other operations are required, resulting in an increase in calculation time.
According to the above, when the preset error coefficient threshold is reduced, the system can perform self-adaptive correction to improve the calculation accuracy, but the calculation time can be increased to influence arc extinction quick response, the accuracy and the response time are comprehensively considered, and the preset error coefficient threshold is generally set to be 0.2-0.35.
In the above embodiment, the determination process of the active arc suppression control parameter is described in detail in combination with the first inductance value of the auxiliary inductance, and the detailed description will be continued on the case where the current error coefficient does not satisfy the preset error coefficient threshold.
In an embodiment, the method for determining the active arc suppression control parameter may further include:
s144: and under the condition that the current error coefficient does not meet a preset error coefficient threshold value, determining a second inductance value of the auxiliary inductor according to the first inductance value, the current error coefficient and the preset error coefficient threshold value.
In this embodiment, if the current error coefficient is large and does not satisfy the predetermined error coefficient threshold, it indicates that after the first inductance value of the auxiliary inductor is switched in, the value thereof cannot provide a good measurement environment, and at this time, the second inductance value may be set to reduce the current error.
Further, the second inductance value may be determined according to the first inductance value, the current error coefficient and a predetermined error coefficient threshold, and the specific formula is as follows:
LT2＝LT1+LT1(λ-ξ)
wherein L isT2And xi is a second inductance value and preset error coefficient threshold.
In the above embodiment, the case that the current error coefficient does not satisfy the preset error coefficient threshold value is explained in detail, and the determination of the third ac signal will be continued based on the previous embodiment.
In one embodiment, in a case that the current error coefficient does not satisfy a preset error coefficient threshold, the method may further include:
s145: a third ac signal is determined.
In this embodiment, after determining the new inductance value, it is necessary to determine the third ac signal, so as to calculate the ground impedance according to the three currents, frequencies, and voltages, and calculate the injection reverse current by combining the bus voltage.
It is understood that the third ac signal is different in frequency and amplitude from the first ac signal and the second ac signal.
The above embodiments illustrate how the third ac signal is determined, and how the third voltage signal is determined will be described below.
In an embodiment, the method for determining the active arc suppression control parameter may further include:
s146: injecting the third AC signal into an open side of the voltage transformer.
S147: and receiving a third voltage signal corresponding to the third alternating current signal returned by the opening triangle side of the voltage transformer.
In this embodiment, after determining the second inductance value of the auxiliary inductor and the amplitude and frequency of the third ac signal, the third ac signal may be injected to the open-triangle side of the voltage transformer connected in series with the auxiliary inductor, so as to receive the third voltage signal corresponding to the third ac signal returned by the open-triangle side of the voltage transformer, and thus, the active arc suppression control parameter may be determined again.
How to determine the third voltage signal is explained in the above embodiments, and the determination of the active arc suppression control parameter will be explained in detail below.
In one embodiment, as shown in fig. 4, fig. 4 is a schematic operation flow diagram for determining an active arc suppression control parameter according to an embodiment of the present invention; the method for determining the active arc suppression control parameter may further include:
s148: and acquiring the bus voltage and the winding ratio of the voltage transformer.
S149: and re-determining the active arc suppression control parameter according to the bus voltage, the winding ratio of the voltage transformer, the second inductance value, the first alternating current signal, the first voltage signal, the second alternating current signal, the second voltage signal, the third alternating current signal and the third voltage signal.
In this embodiment, as shown in fig. 4, when the calculated current error coefficient is large and does not satisfy the preset error coefficient threshold, a new inductance value needs to be determined again, a third ac signal is injected, a third voltage signal is returned through the open triangle side of the voltage transformer, and the active arc suppression control parameter needs to be determined again according to the bus voltage, the winding ratio of the voltage transformer, the second inductance value, the first ac signal, the first voltage signal, the second ac signal, the second voltage signal, the third ac signal, and the third voltage signal.
Specifically, the injection amplitude from the open triangular side of the voltage transformer is i3Frequency of f3Measuring and recording a third voltage signal u returned from the open triangle side of the PT3Then, according to the three input and returned values, the injected reverse current is calculated, and the specific calculation formula is as follows:
the following describes a device for determining an active arc suppression control parameter provided in an embodiment of the present application, and the device for determining an active arc suppression control parameter described below and the method for determining an active arc suppression control parameter described above may be referred to correspondingly.
In an embodiment, as shown in fig. 5, fig. 5 is a schematic structural diagram of an apparatus for determining an active arc suppression control parameter according to an embodiment of the present invention; the invention also provides a device for determining an active arc suppression control parameter, which comprises a signal determining module 210, a signal injecting module 220, a signal receiving module 230 and a parameter determining module 240, and specifically comprises the following components:
the signal determining module 210 is configured to determine a first ac signal and a second ac signal, where both the frequency and the amplitude of the first ac signal and the second ac signal are different.
And a signal injection module 220 for injecting the first ac signal and the second ac signal into the open triangle side of the voltage transformer, respectively.
The signal receiving module 230 is configured to receive a first voltage signal corresponding to the first alternating current signal and a second voltage signal corresponding to the second alternating current signal, where the first voltage signal is returned from the open triangle side of the voltage transformer.
A parameter determining module 240, configured to determine an active arc suppression control parameter according to the first ac signal, the first voltage signal, the second ac signal, and the second voltage signal.
In the above embodiment, the first alternating current signal and the second alternating current signal with different frequencies and different amplitudes are respectively injected into the opening triangle side of the voltage transformer, the first voltage signal corresponding to the first alternating current signal and the second voltage signal corresponding to the second alternating current signal, which are returned from the opening triangle side of the voltage transformer, are received, and the active arc extinction control parameter can be determined by using the first alternating current signal, the first voltage signal, the second alternating current signal and the second voltage signal.
In one embodiment, the present invention also provides a storage medium having computer readable instructions stored therein, which when executed by one or more processors, cause the one or more processors to perform the steps of the method of determining an active arc suppression control parameter as described in any of the above embodiments.
In one embodiment, the present invention also provides a computer device having stored therein computer readable instructions, which when executed by one or more processors, cause the one or more processors to perform the steps of the method of determining an active arc suppression control parameter as described in any one of the above embodiments.
Fig. 6 is a schematic diagram illustrating an internal structure of a computer device according to an embodiment of the present invention, and fig. 6 is a schematic diagram, where the computer device 300 may be provided as a server. Referring to fig. 6, computer device 300 includes a processing component 302 that further includes one or more processors, and memory resources, represented by memory 301, for storing instructions, such as application programs, that are executable by processing component 302. The application programs stored in memory 301 may include one or more modules that each correspond to a set of instructions. Further, the processing component 302 is configured to execute instructions to perform the method of determining an active arc suppression control parameter of any of the embodiments described above.
The computer device 300 may also include a power component 303 configured to perform power management of the computer device 300, a wired or wireless network interface 304 configured to connect the computer device 300 to a network, and an input output (I/O) interface 305. The computer device 300 may operate based on an operating system stored in memory 301, such as Windows Server, Mac OS XTM, Unix, Linux, Free BSDTM, or the like.
Those skilled in the art will appreciate that the architecture shown in fig. 6 is merely a block diagram of some of the structures associated with the disclosed aspects and is not intended to limit the computing devices to which the disclosed aspects apply, as particular computing devices may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, the embodiments may be combined as needed, and the same and similar parts may be referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A method of determining an active arc suppression control parameter, the method comprising:
determining a first alternating current signal and a second alternating current signal, wherein the frequency and the amplitude of the first alternating current signal are different from those of the second alternating current signal;
injecting the first alternating current signal and the second alternating current signal into the open triangle side of the voltage transformer respectively;
receiving a first voltage signal corresponding to the first alternating current signal and a second voltage signal corresponding to the second alternating current signal, which are returned from the triangular opening side of the voltage transformer;
and determining an active arc suppression control parameter according to the first alternating current signal, the first voltage signal, the second alternating current signal and the second voltage signal.
2. The method of determining an active arc suppression control parameter according to claim 1, wherein prior to the step of injecting the first and second ac signals into the open triangle sides of a voltage transformer, further comprising:
determining a first inductance value of an auxiliary inductor, the auxiliary inductor being connected in series with the open-delta side of the voltage transformer for controlling the injected first and second ac signals.
3. The method of determining an active arc suppression control parameter of claim 2, wherein said step of determining an active arc suppression control parameter based on said first ac signal, said first voltage signal, said second ac signal, and said second voltage signal comprises:
determining a current error coefficient according to the first alternating current signal, the first voltage signal, the second alternating current signal and the second voltage signal;
under the condition that the current error coefficient meets a preset error coefficient threshold value, acquiring bus voltage and a winding ratio of the voltage transformer;
and determining an active arc suppression control parameter according to the bus voltage, the winding ratio of the voltage transformer, the first inductance value, the first alternating current signal, the first voltage signal, the second alternating current signal and the second voltage signal.
4. A method of determining an active arc suppression control parameter as set forth in claim 3, further comprising:
and under the condition that the current error coefficient does not meet a preset error coefficient threshold value, determining a second inductance value of the auxiliary inductor according to the first inductance value, the current error coefficient and the preset error coefficient threshold value.
5. The method of determining an active arc suppression control parameter of claim 4, wherein in the event that the current error coefficient does not meet a preset error coefficient threshold, the method further comprises:
and determining a third alternating current signal, wherein the frequency and the amplitude of the third alternating current signal are different from those of the first alternating current signal and the second alternating current signal.
6. The method of determining an active arc suppression control parameter of claim 5, further comprising:
injecting the third AC signal into an open side of the voltage transformer;
and receiving a third voltage signal corresponding to the third alternating current signal returned by the opening triangle side of the voltage transformer.
7. The method of determining an active arc suppression control parameter of claim 6, further comprising:
acquiring the bus voltage and the winding ratio of the voltage transformer;
and re-determining the active arc suppression control parameter according to the bus voltage, the winding ratio of the voltage transformer, the second inductance value, the first alternating current signal, the first voltage signal, the second alternating current signal, the second voltage signal, the third alternating current signal and the third voltage signal.
8. An active arc suppression control parameter determination device, comprising:
the signal determination module is used for determining a first alternating current signal and a second alternating current signal, wherein the frequency and the amplitude of the first alternating current signal are different from those of the second alternating current signal;
the signal injection module is used for respectively injecting the first alternating current signal and the second alternating current signal to the open triangle side of the voltage transformer;
the signal receiving module is used for receiving a first voltage signal corresponding to the first alternating current signal and a second voltage signal corresponding to the second alternating current signal, wherein the first voltage signal is returned from the triangular opening side of the voltage transformer;
and the parameter determining module is used for determining an active arc suppression control parameter according to the first alternating current signal, the first voltage signal, the second alternating current signal and the second voltage signal.
9. A storage medium, characterized by: the storage medium having stored therein computer readable instructions which, when executed by one or more processors, cause the one or more processors to perform the steps of the method of determining an active arc suppression control parameter of any one of claims 1 to 7.
10. A computer device, characterized by: stored in the computer device are computer readable instructions which, when executed by one or more processors, cause the one or more processors to carry out the steps of the method of determining an active arc suppression control parameter according to any one of claims 1 to 7.
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