Multi-gear output reactor device

Abstract

The utility model discloses a multi-gear output reactor device. The reactor device at least comprises a first reactor and a second reactor, the reactor I is provided with more than two taps, including an I1th tap, an I2th tap,..., and an IKth tap, and K is a first preset value and is a positive integer greater than or equal to 2; the output reactance value of the first tap is A, and A is the minimum reactance value which can be provided by the first reactor; the output reactance value of the I2th tap is 2A; ..., the output reactance value of the IKth tap is K * A; and the second reactor is provided with more than one tap, including a second tap and a second tap. According to the utility model, the output reactance value range of the whole product can be quickly adjusted by setting the number of the taps on each reactor and the number of the reactors, so that the requirements of users can be quickly met, the reactors can be standardized, and the production and manufacturing cost can be reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of electric reactors, in particular to a kind of multi-gear output electric reactor device. BACKGROUND

[0002] Chinese patent document No.CN 101710820 B discloses a kind of super, extra-high voltage transformer type hierarchical controllable shunt reactor dynamic simulation device on July 12, 2024, the device includes: single-phase discrete dry-type transformer each phase is externally connected with different kinds of electric reactors LB1~LB9, transformer primary side is controlled by AC contactor KKB~KKC to be connected or exited system, electric reactor is connected with bidirectional thyristor GTB1~GTB8 respectively, and the input and exit of different kinds of electric reactors are controlled by bidirectional thyristor, the primary side of the device is connected into "II" connection mode, secondary side is single-phase closed connection, and the end is directly grounded, according to simulation requirement, it is designed into 9 levels switchable capacity, 12 taps are sequentially arranged from neutral point to primary side, to realize the simulation test of different range of controllable shunt reactor turn-to-turn short circuit fault.The current transformer and voltage transformer are arranged on the primary side and secondary side of the device body, to meet the needs of electric reactor body protection in dynamic simulation test, the control system is composed of microcomputer controller and host computer, the control system imports the current and voltage signals of current transformer and voltage transformer, and calculates active power, reactive power value and the like, and the results are transmitted to CⅢU of main control board by point-to-point communication mode, and the conduction of bidirectional thyristor is controlled by output pulse control signal M1~M8.The adjustment range of this super, extra-high voltage transformer type hierarchical controllable shunt reactor dynamic simulation device is relatively narrow, and needs to be improved. CONTENT OF UTILITY MODEL

[0003] The utility model aims at providing a kind of multi-gear output electric reactor device with wide adjustment range and easy to manufacture, to overcome the deficiencies in the prior art.

[0004] A kind of multi-gear output electric reactor device designed according to the purpose, it is characterized in that the electric reactor device at least includes first electric reactor and second electric reactor;

[0005] Two or more taps are arranged on the first electric reactor, including first 1 tap and first 2 tap, …, first K tap, wherein, K is the first preset value, K is positive integer greater than or equal to 2;

[0006] The output reactance value of the first 1 tap is A, and A is the minimum reactance value that the first electric reactor can provide;

[0007] The output reactance value of the first 2 tap is 2A;

[0008] …

[0009] The output reactance value of the first I K tap is K*A;

[0010] The second II electric reactor is provided with more than two taps, including the second II 1 tap and the second II 2 tap, …, the second II M tap, wherein M is a second preset value, M is a positive integer greater than or equal to 1;

[0011] The output reactance value of the second II 1 tap is B, and B is the sum of the output reactance value of the first I 1 tap and the output reactance value of the last I K tap of the first I electric reactor, B=A+K*A;

[0012] The output reactance value of the second II 2 tap is 2B;

[0013] …

[0014] The output reactance value of the second II M tap is M*B;

[0015] The sum of the maximum output reactance value of all taps on the first I electric reactor and the maximum output reactance value of all taps on the second II electric reactor is K*A+M*B=(K+M+K*M)*A;

[0016] The external output reactance value of any tap on the first I electric reactor or any tap on the second II electric reactor, or the series connection of any tap on the first I electric reactor and any tap on the second II electric reactor, of the electric reactor device is X, and the value range of X is A~(K+M+K*M)*A.

[0017] Further, the electric reactor device further comprises a third III electric reactor; the third III electric reactor is provided with more than two taps, including the third III 1 tap and the third III 2 tap, …, the third III N tap, wherein N is a third preset value, N is a positive integer greater than or equal to 1;

[0018] The output reactance value of the third III 1 tap is C, and C is the sum of the output reactance value of the first II 1 tap and the output reactance value of the last II M tap of the second II electric reactor, C=B+M*B;

[0019] The output reactance value of the third III 2 tap is 2C;

[0020] …

[0021] The output reactance value of the third III N tap is N*C;

[0022] The sum of the maximum output reactance value in all taps on the first reactance and the maximum output reactance value in all taps on the second reactance is (K*A+M*B+N*C)=(K+M+N+K*M+K*N+M*N+K*M*N)*A;

[0023] The external output reactance value of the reactance device after the series connection of any tap on the first reactance, any tap on the second reactance, or any tap on the third reactance, or any tap on the first reactance and / or any tap on the second reactance and / or any tap on the third reactance is X, and the value range of X is A~(K+M+N+K*M+K*N+M*N+K*M*N)*A.

[0024] Similarly.

[0025] An operating method of a multi-gear output reactance device, characterized by comprising the following steps:

[0026] Step one, according to the maximum external output reactance value X and the minimum output reactance value A, enter step two, wherein the value range of A is 0.001~1000;

[0027] Step two, according to the on-site installation requirements and the manufacturing requirements, determine the maximum tap number P1 of the first reactance and the design scheme, enter step three, wherein P1 is a positive integer greater than or equal to 2;

[0028] Step three, K=P1, enter step four;

[0029] Step four, judge whether K*A≥X is true, when it is true, enter step one hundred and one, otherwise enter step five;

[0030] Step five, according to the on-site installation requirements and the manufacturing requirements, determine the maximum tap number P2 of the second reactance and the design scheme, enter step six, wherein P2 is a positive integer greater than or equal to 1;

[0031] Step six, M=P2, enter step seven;

[0032] Step seven, judge whether (K+M+K*M)*A≥X is true, when it is true, enter step one hundred and one, otherwise enter step eight;

[0033] Step eight, according to the on-site installation requirements and the manufacturing requirements, determine the maximum tap number P3 of the third reactance and the design scheme, enter step nine, wherein P3 is a positive integer greater than or equal to 1;

[0034] Step nine, N=P3, enter step ten;

[0035] Step ten, judge whether (K+M+N+K*M+K*N+M*N+K*M*N)*A≥X is established, when it is established, enter step one hundred and three, otherwise enter step eleven;

[0036] Step eleven, determine the maximum number of taps P4 of the fourth reactor and the design scheme according to the field installation requirements and the manufacturing requirements, wherein P4 is a positive integer greater than or equal to 2;

[0037] In this way;

[0038] Step one hundred and one, determine that the design scheme of the first reactor meets the requirements;

[0039] Step one hundred and two, determine that the design scheme of the first reactor plus the second reactor meets the requirements;

[0040] Step one hundred and three, determine that the design scheme of the first reactor plus the second reactor and the third reactor meets the requirements.

[0041] A tap selection method of a multi-gear output reactor device, characterized in that first, a tap with an output reactance value less than or equal to and closest to the external output reactance value is selected, then a tap with an output reactance value less than or equal to and closest to the difference between the external output reactance value and the output reactance value corresponding to the previous tap is selected, and in this way, a tap corresponding to the external output reactance value is selected.

[0042] The technical scheme is adopted, the number of taps on each reactor and the number of reactors are set to quickly adjust the range of the external output reactance value X of the whole product, thereby quickly meeting the user demand, and the reactor can be standardized, the production efficiency is improved, and the production manufacturing cost is reduced.

[0043] The tap selection method can improve the speed and accuracy of selection and determination.

[0044] The utility model is especially suitable for places where the external output reactance value needs to be changed repeatedly many times.

[0045] In summary, the utility model has the characteristics of wide adjustment range and easy manufacturing. BRIEF DESCRIPTION OF DRAWINGS

[0046] Figure 1 It is the three-dimensional structure schematic diagram of an embodiment of the utility model.

[0047] Figure 2 It is the operation flow chart of the utility model. DETAILED DESCRIPTION

[0048] The utility model will be further described below in combination with the drawings and embodiments.

[0049] First embodiment

[0050] Referring to Figure 1 A multi-tap output reactor device, comprising a first reactor and a second reactor.

[0051] The first reactor is provided with two or more taps, including a first 1 tap and a first 2 tap, a first K tap, wherein K is a first preset value, K is a positive integer greater than or equal to 2; the output reactance value of the first 1 tap is A, and A is the minimum reactance value that the first reactor can provide. The unit of the output reactance value A is ohm.

[0052] The output reactance value of the first 2 tap is 2A.

[0053] …

[0054] The output reactance value of the first K tap is K*A.

[0055] The second reactor is provided with one or more taps, including a second 1 tap and a second 2 tap, a second M tap, wherein M is a second preset value, M is a positive integer greater than or equal to 1.

[0056] The output reactance value of the second 1 tap is B, and B is the sum of the output reactance value of the first 1 tap and the output reactance value of the last first K tap of the first reactor, B = A + K*A.

[0057] The output reactance value of the second 2 tap is 2B.

[0058] …

[0059] The output reactance value of the second M tap is M*B.

[0060] The sum of the maximum output reactance value of all taps on the first reactor and the maximum output reactance value of all taps on the second reactor is: K*A + M*B = (K + M + K*M)*A.

[0061] The output reactance value of any tap on the first reactor or any tap on the second reactor, or the series connection of any tap on the first reactor and any tap on the second reactor, of the reactor device is X, and the value range of X is: A ~ (K + M + K*M)*A.

[0062] The reactance value step difference of each adjacent step of the reactance device is A; the step number is K+M+K*M, that is, the reactance values output by the reactance device from small to large are A, 2*A, 3*A, …, (K+M+K*M)*A.

[0063] The reactance device composed of the first I reactance and the first II reactance, if the selected step can be satisfied by a certain tap of a reactance, the corresponding tap of the reactance is directly selected; if the selected step is satisfied by the corresponding taps of two reactances, the corresponding taps of the two reactances are connected in series.

[0064] In the embodiment, the output reactance values of the first I1 tap, the first I2 tap, …, the first IK tap of the first I reactance have an arithmetic progression relationship, that is, the reactance value step difference between two adjacent taps is fixed and unchanged, and the reactance value step difference of the first I reactance is A.

[0065] Second embodiment

[0066] In the embodiment, the reactance device further comprises a first III reactance; the first III reactance is provided with two or more taps, including a first III1 tap and a first III2 tap, …, a first III N tap, wherein N is a third preset value, N is a positive integer greater than or equal to 1;

[0067] The output reactance value of the first III1 tap is C, and the C is the sum of the output reactance value of the first II1 tap and the output reactance value of the first II M tap of the last first II reactance, C=B+M*B;

[0068] The output reactance value of the first III2 tap is 2C;

[0069] …

[0070] The output reactance value of the first III N tap is N*C.

[0071] The sum of the maximum output reactance value of all taps on the first I reactance and the maximum output reactance value of all taps on the first II reactance is:

[0072] K*A+M*B+N*C=(K+M+N+K*M+K*N+M*N+K*M*N)*A.

[0073] The external output reactance value of the reactor device in series with any tap of the first I reactor, any tap of the first II reactor, or any tap of the first III reactor, or any tap of the first I reactor and / or any tap of the first II reactor and / or any tap of the first III reactor is X, and the value range of X is A~(K+M+N+K*M+K*N+M*N+K*M*N)*A.

[0074] The adjacent gear reactance value of the reactor device is A. The number of gears is K+M+N+K*M+K*N+M*N+K*M*N.

[0075] The external output reactance value of the reactor device is arranged from small to large as A, 2*A, 3*A, …, (K+M+N+K*M+K*N+M*N+K*M*N)*A.

[0076] The reactor device composed of the first I reactor, the first II reactor, and the first III reactor, if the selected gear can be satisfied by a tap of one reactor, the corresponding tap of the reactor is directly selected; if the selected gear is satisfied by the corresponding taps of two or three reactors, the corresponding taps of the two or three reactors are connected in series.

[0077] By analogy.

[0078] The remaining unstated parts are seen in the first embodiment, and will not be repeated.

[0079] Third embodiment

[0080] Referring to Figure 2 A method for operating a multi-gear output reactor device, comprising the following steps:

[0081] Step one, according to the maximum external output reactance value X and the minimum output reactance value A, enter step two, wherein the value range of A is 0.001~1000;

[0082] Step two, according to the site installation requirements and the manufacturing requirements to determine the maximum tap number P1 of the first I reactor and the design scheme, enter step three, wherein P1 is a positive integer greater than or equal to 2.

[0083] In this embodiment, the site installation requirements include the safety height, safety width, safety depth, etc. of the site, and the manufacturing requirements include the manufacturing accuracy, protection level, insulation level, quality factor, allowable deviation, noise, etc.

[0084] Step three, K=P1, enter step four;

[0085] Step four, judge whether K*A≥X is true, when it is true, enter step one hundred and one, otherwise enter step five;

[0086] Step five, determine the maximum number of taps P2 of the second reactor and the design scheme according to the field installation requirements and the manufacturing requirements, enter step six, wherein P2 is a positive integer greater than or equal to 1;

[0087] Step six, M=P2, enter step seven;

[0088] Step seven, judge whether (K+M+K*M)*A≥X is true, when it is true, enter step one hundred and one, otherwise enter step eight;

[0089] Step eight, determine the maximum number of taps P3 of the third reactor and the design scheme according to the field installation requirements and the manufacturing requirements, enter step nine, wherein P3 is a positive integer greater than or equal to 1;

[0090] Step nine, N=P3, enter step ten;

[0091] Step ten, judge whether (K+M+N+K*M+K*N+M*N+K*M*N)*A≥X is true, when it is true, enter step one hundred and three, otherwise enter step eleven;

[0092] Step eleven, determine the maximum number of taps P4 of the fourth reactor and the design scheme according to the field installation requirements and the manufacturing requirements, wherein P4 is a positive integer greater than or equal to 2;

[0093] And so on;

[0094] Step twelve, determine that the design scheme of the first reactor meets the requirements;

[0095] Step thirteen, determine that the design scheme of the first reactor plus the second reactor meets the requirements;

[0096] Step fourteen, determine that the design scheme of the first reactor plus the second reactor and the third reactor meets the requirements.

[0097] The remaining unstated parts are seen in the second embodiment, which will not be repeated.

[0098] Fourth embodiment

[0099] A tap selection method of a multi-gear output reactor device, first select a tap with an output reactance value less than or equal to and closest to the external output reactance value, then select a tap with an output reactance value less than or equal to and closest to the difference between the external output reactance value and the output reactance value corresponding to the previous tap, and so on, until the tap corresponding to the external output reactance value is selected.

[0100] The remaining unstated parts are seen in the third embodiment, and will not be repeated here.

[0101] First application example

[0102] In this application example, the reactor device includes a first reactor and a second reactor, and K=5 and M=5 are set.

[0103] Then, the first reactor is respectively provided with a first 1 tap, a first 2 tap, a first 3 tap, a first 4 tap and a first 5 tap, and the minimum reactance value A=0.2 that the first reactor can provide.

[0104] The output reactance value of the first 1 tap is A=0.2;

[0105] The output reactance value of the first 2 tap is 2A=0.4;

[0106] The output reactance value of the first 3 tap is 3A=0.6;

[0107] The output reactance value of the first 4 tap is 4A=0.8;

[0108] The output reactance value of the first 5 tap is 5A=1.

[0109] The second reactor is respectively provided with a second 1 tap, a second 2 tap, a second 3 tap, a second 4 tap and a second 5 tap.

[0110] The output reactance value of the second 1 tap is B=A+5A=1.2;

[0111] The output reactance value of the second 2 tap is 2B=2.4;

[0112] The output reactance value of the second 3 tap is 3B=3.6;

[0113] The output reactance value of the second 4 tap is 4B=4.8;

[0114] The output reactance value of the second 5 tap is 5B=6.

[0115] The sum of the maximum output reactance value in all taps of the first reactor and the maximum output reactance value in all taps of the second reactor is:

[0116] 5A+5B=5*A+5*(A+5A)=35A=35*0.2=7; then the reactor device combined by the first reactor and the second reactor can output the reactance value in the range of 1-7.

[0117] In the application example, the number of gears of the reactor device is: K+M+K*M=5+5+5*5=35, the reactance value gear difference of each adjacent gear is 0.2, that is, the reactance values outputted by the reactor device from small to large are: 0.2, 0.4, 0.6, …, 7.

[0118] For the selection of the tap of the reactor device, the tap corresponding to the reactance value less than or equal to and closest to the output reactance value should be selected first, then the tap corresponding to the reactance value less than or equal to and closest to the difference between the output reactance value and the reactance value of the previous tap is selected, and so on, until the tap corresponding to the output reactance value is selected. The tap here includes a single selected tap or a combination of multiple selected taps.

[0119] According to the method provided by the present application, the maximum number of times of actual selection will not exceed the total number of reactors when the tap selection method is used to select the tap, and any two taps on the same reactor will not be selected at the same time.

[0120] The maximum number of times of selection will not exceed the number of reactors, and any two taps on the same reactor will not be selected at the same time.

[0121] The selection method can improve the speed and accuracy of selection and determination.

[0122] The maximum number of times of selection does not exceed the total number of reactors in the reactor device.

[0123] When the output reactance value of the reactor device is 0.2, the first 11 tap corresponding to the output reactance value of 0.2 is selected, and the difference is 0.2-0.2=0, and the selection is completed. The first 11 tap of the first reactor is connected to the corresponding circuit.

[0124] When the output reactance value of the reactor device is 2.4, the second 22 tap corresponding to the output reactance value of 2.4 is selected, and the difference is 2.4-2.4=0, and the selection is completed. The second 22 tap of the second reactor is connected to the corresponding circuit.

[0125] When the output reactance value of the reactor device is 3.2, the second 22 tap corresponding to the output reactance value of 2.4 is selected first, and the difference is 3.2-2.4=0.8, then the fourth 14 tap is selected according to 0.8, and the difference is 0.8-0.8=0 at this time, and the selection is completed. The second 22 tap of the second reactor and the fourth 14 tap of the first reactor are connected in series to the corresponding circuit; 2.4+0.8=3.8.

[0126] When the required external output reactance value of the reactor device is 6.8, first select the II5 tap corresponding to the output reactance value of 6, the difference value is 6.8-6=0.8, then select the I4 tap according to 0.8, at this time the difference value is 0.8-0.8=0, the selection is completed. The II5 tap of the II reactor and the I4 tap of the I reactor are connected in series into the corresponding circuit, and the output reactance value is 6+0.8=6.8.

[0127] Second application example

[0128] In this application example, the reactor device comprises an I reactor, a II reactor and a III reactor, K=4, M=5 and N=6 are set.

[0129] Then, the I1 tap, the I2 tap, the I3 tap and the I4 tap are respectively arranged on the I reactor, and the minimum reactance value A provided by the I reactor is 0.3.

[0130] The output reactance value of the I1 tap is A=0.3;

[0131] The output reactance value of the I2 tap is 2A=0.6;

[0132] The output reactance value of the I3 tap is 3A=0.9;

[0133] The output reactance value of the I4 tap is 4A=1.2.

[0134] The II1 tap, the II2 tap, the II3 tap, the II4 tap and the II5 tap are respectively arranged on the II reactor.

[0135] The output reactance value of the II1 tap is B=A+4A=1.5;

[0136] The output reactance value of the II2 tap is 2B=3;

[0137] The output reactance value of the II3 tap is 3B=4.5;

[0138] The output reactance value of the II4 tap is 4B=6;

[0139] The output reactance value of the II5 tap is 5B=7.5.

[0140] The III1 tap, the III2 tap, the III3 tap, the III4 tap, the III5 tap and the III6 tap are respectively arranged on the III reactor.

[0141] The output reactance value of the III1 tap is C=B+5*B=1.5+5*1.5=9;

[0142] The output reactance value of the III2 tap is 2C=2*9=18;

[0143] The output reactance value of the 3rd tap of the 3rd reactor is 3C=3*9=27;

[0144] The output reactance value of the 4th tap of the 3rd reactor is 4C=4*9=36;

[0145] The output reactance value of the 5th tap of the 3rd reactor is 5C=5*9=45;

[0146] The output reactance value of the 6th tap of the 3rd reactor is 6C=6*9=54.

[0147] The sum of the maximum output reactance value in all taps of the 1st reactor, the maximum output reactance value in all taps of the 2nd reactor and the maximum output reactance value in all taps of the 3rd reactor is:

[0148] (K+M+N+K*M+K*N+M*N+K*M*N)*A=(4+5+6+4*5+4*6+5*6+4*5*6)*0.3=62.7.

[0149] Therefore, the reactor device composed of the 1st reactor, the 2nd reactor and the 3rd reactor can output the range of the external output reactance value of 1-62.7. The adjacent gear reactance value gear difference is 0.3. The gear number is: 4+5+6+4*5+4*6+5*6+4*5*6=209, that is, the output reactance value of the reactor device is arranged from small to large as: 0.3, 0.6, 0.9, …, 62.7.

[0150] When the external output reactance value required by the reactor device is 59.7, the 6th tap of the 3rd reactor, the 3rd tap of the 2nd reactor and the 4th tap of the 1st reactor are connected in series, that is, 54+4.5+1.2=59.7.

[0151] When the external output reactance value required by the reactor device is 44.7, the 4th tap of the 3rd reactor, the 5th tap of the 2nd reactor and the 4th tap of the 1st reactor are connected in series, that is, 36+7.5+1.2=44.7.

[0152] When the external output reactance value required is 54.6, the 6th tap of the 3rd reactor and the 2nd tap of the 1st reactor are connected, that is, 54+0.6=54.6.

[0153] The remaining unstated part is described in the first application example, and will not be repeated.

[0154] In the description of the utility model, the terms "first", "second" are only used for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0155] The basic principle and main features of the present application and the advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A multi-tap output reactor device, characterized by The reactance device comprises at least a first reactance and a second reactance; The first reactance is provided with two or more taps, including a first I1 tap, a first I2 tap,..., and a first IK tap, wherein K is a first preset value, and K is a positive integer greater than or equal to 2; An output reactance value of the first I1 tap is A, and the A is a minimum reactance value that the first reactance can provide; a reactance value step difference of the first reactance is A; An output reactance value of the first I2 tap is 2A; …… An output reactance value of the first IK tap is K*A; The second reactance is provided with one or more taps, including a second I1 tap, a second I2 tap,..., and a second IM tap, wherein M is a second preset value, and M is a positive integer greater than or equal to 1; An output reactance value of the second I1 tap is B, and the B is a sum of an output reactance value of a first I1 tap of a previous reactance, that is, the first reactance, and an output reactance value of a last first IK tap, B = A + K*A; An output reactance value of the second I2 tap is 2B; …… An output reactance value of the second IM tap is M*B; A sum of a maximum output reactance value of all taps of the first reactance and a maximum output reactance value of all taps of the second reactance is K*A + M*B = (K + M + K*M)*A; An output reactance value of any tap of the first reactance, any tap of the second reactance, or any tap of the first reactance in series with any tap of the second reactance of the reactance device is X, and a value range of the X is A to (K + M + K*M)*A; A reactance value step difference of adjacent steps of the reactance device is A, and reactance values that can be output by the reactance device are arranged from small to large as A, 2A, 3A,..., (K + M + K*M)*A.

2. The reactance device of claim 1, wherein The reactance device further comprises a third reactance; the third reactance is provided with two or more taps, including a third I1 tap, a third I2 tap,..., and a third IN tap, wherein N is a third preset value, and N is a positive integer greater than or equal to 1; An output reactance value of the third I1 tap is C, and the C is a sum of an output reactance value of a first I1 tap of a previous reactance, that is, the second reactance, and an output reactance value of a last second IM tap, C = B + M*B; An output reactance value of the third I2 tap is 2C; …… An output reactance value of the third IN tap is N*C; A sum of a maximum output reactance value of all taps of the first reactance, a maximum output reactance value of all taps of the second reactance, and a maximum output reactance value of all taps of the third reactance is K*A + M*B + N*C = (K + M + N + K*M + K*N + M*N + K*M*N)*A; The external output reactance value of the reactor device after series connection of any tap on the first reactor, any tap on the second reactor, or any tap on the third reactor, or any tap on the first reactor and / or any tap on the second reactor and / or any tap on the third reactor is X, and the value range of X is A~(K+M+N+K*M+K*N+M*N+K*M*N)*A; The reactance values outputted by the reactor device from small to large are A, 2A, 3A, …, (K+M+N+K*M+K*N+M*N+K*M*N)*A. And so on.

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