TW201043533A - Short-circuit current detection device for ship - Google Patents

Abstract

A short-circuit current detection device for a ship comprises a power equipment impedance calculation module, a synthesis impedance calculation module, a generator and motor parameter correction module, and a short circuit current calculation module. The power equipment impedance calculation module performs a first calculation with an input data group to generate a first calculation result. The synthesis impedance calculation module receives the first calculation result and executes a second calculation to generate a second calculation result. The generator and motor parameter correction module receives the second calculation result and performs a third calculation to generate a third calculation result. The short circuit current calculation module receives the third calculation result and performs a fourth calculation to produce an output result group.

Description

201043533 VI. Description of the invention: [Technical field to which the invention pertains] The invention relates to a current detecting device, and more particularly to a ship-to-ship short-circuit current detecting device. [Prior Art] In the actual operation of the ship's power system, short-circuit faults are difficult to avoid, and natural aging, mechanical damage, and improper operation of the insulation may cause a short circuit. When a short circuit occurs near the main busbar in the ship's power system, a short-circuit current that is much larger than the normal value will occur. In addition, when the short-circuit fault occurs, the total impedance of the system is small, which often causes the most serious short-circuit condition—metal Slight short circuit 0 Furthermore, the short-circuit impedance of the system is also extremely related to the position of the short-circuit point. The closer the short-circuit point is to the power supply, the smaller the total impedance of the system, and the shorter the value of the short-circuit current, even if the short-circuit occurs. The mechanical stress and thermal effects of short, powerful short-circuit currents can cause severe damage to generators or other related equipment. In addition, the short-circuit current will cause the grid voltage to drop to a large extent, affecting the operation of the equipment, so that the subsequent operation of the motor is stopped and other subsequent damages. Therefore, in summary, the short-circuit current has the following conditions for the damage caused by the electrical installation: (1) causing heat and loss of electrical equipment. (2) Cause a large voltage drop, causing the motor speed to drop or even stop running. (3) Large mechanical stress is generated, causing deformation and damage of current-carrying parts of electrical equipment. 3 201043533 (4) When a single short circuit is short-circuited, unbalanced current and magnetic field are generated to affect the communication and related equipment control. (5) If the short-circuit current occurs near the power supply, it will cause the generator or other equipment to lose synchronization and disassociation and affect the operation of the system. It can be seen from the above that the short-circuit current has a great influence on the operation of electrical equipment. At present, the problem of short-circuit current can be transmitted through the relevant protection device to quickly cut off the line of the faulty device to prevent the fault current from continuing to flow, thereby reducing the damage range. The smallest. In ship power systems, commonly used protection devices, such as fuses or circuit breakers (CB). In addition, an arc is often generated when the fault current is turned off, and therefore, the aforementioned protection device must also have an arc extinguishing capability 'to safely turn off the fault current. Furthermore, in addition to using the method of breaking the fault current to deal with the short-circuit current problem, the relevant power distribution equipment, such as cables, wires, bus bars, sectional switches, transformers, etc., must be able to withstand the thermal effects and mechanical effects of instantaneous fault currents. Stress, that is, a large equipment short-circuit strength. Therefore, when designing the ship's power supply system, the fault currents in the system must be calculated before the appropriate protection equipment can be selected to ensure the safety and reliability of the power supply. Nowadays, the ship short-circuit current calculation standard is generally based on the old international standard IEC 60363 Short circuit current evaluation with special regard to rated short-circuit capacity of circuit-breakers in ships". The impedance is converted to 201043533, which simplifies the impedance of the fault point and calculates the short-circuit fault current. However, in the application of the objective, it is still found that the short-circuit current calculation reference has the following disadvantages: (1) Ignore the generator load before the fault (2) Ignore the transient decay of the AC component. (2) Ignore the motor energy conversion efficiency. (4) Ignore the short-circuit current fed by the shaft power generation system. (5) Ignore the influence of the cable operating temperature. The production, government, and academic circles are eager to develop a device for calculating the fault current generated by a short-circuit accident at different locations in the ship's power system, so as to better pre-select enough for the ship's power allocation planning. Broken capacity protection device' quickly Cut off the faulty equipment or line away from the power supply, and minimize the scope of the power outage area caused by the short circuit and the related electrical appliance damage caused by the short circuit. [Summary of the invention] When calculating the short-circuit current, understand the individual equipment The short-circuit current 〇 condition and the influence of multiple power devices connected in series on the short-circuit current are very important. In a complete ship power system, the passive components in the system, such as cables and transformers, have a great influence on the short-circuit current. Large, in addition to changing the steady-state value of the calculation result of the open circuit current, the characteristic data representing the transient process will also be affected. Therefore, the object of the present invention is to provide a ship short-circuit current detecting device 'to obtain accurate short-circuit current The calculation result is as follows. The ship short-circuit current detecting device of the present invention comprises: a power device 5 201043533 2 anti-slim module, a synthetic impedance calculation module, a generator and a motor parameter correction module, and a short-circuit current calculation module. The power device impedance calculation module performs a first: operation m operation result on the input data group. The impedance calculation module receives the first operation result and performs a second operation to generate a second operation result. The generator and the motor parameter correction module receive the second operation result and perform a third operation to generate a first The third operation result, the short-circuit current calculation module receives the third operation result and performs a fourth operation to generate an output result group. ▲ The effect of the invention is that the power device impedance calculation module and the composite impedance The calculation module, the generator and the motor parameter correction module, and the short-circuit current calculation module analyze and calculate various types of input data groups related to the ship power system, thereby obtaining a short-circuit current of the ship. In order to reduce the risk of failure or even damage caused by short circuit of various related electrical equipment. The above and other technical contents, features, and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments. Referring to FIG. 1 , a preferred embodiment of the ship short-circuit current detecting device of the present invention comprises a human-machine interface 11 , an electrical equipment impedance calculation module 12 , a synthetic impedance calculation module 13 , a generator and a motor parameter correction module 14 . And a short circuit current calculation module 15. The human interface 11 receives an input from the user 3, generates an input resource 201043533, and transmits it to the power device impedance calculation module 12. In the preferred embodiment, the human interface η is developed by Microsoft (Micr〇s〇ft) Excei software, and its home interface is shown in FIG. 2, and the human interface 11 further includes a plurality of inputs. Pagination: a generator parameter input page (see Figure 3), a transformer parameter input page (see Figure 4), a motor parameter input page (see Figure 5), a bus voltage input page (see Figure 6), a line The impedance input page (see Figure 7), a transformer line parameter input page (see Figure 8), a fault point line parameter input page (see Figure 9), and a cable impedance parameter number input page (see Figure 10). It is to be noted that, in the preferred embodiment, the input data group 21 required for the calculation of the power device impedance calculation module 12 includes a set of paging parameters input by the generator parameters, a parameter input of the transformer, and a motor. Parameter input page, bus voltage input page and line impedance input page are integrated into the device basic data, a set of transformer line parameters entered via the transformer line parameter input page, and a set of page entry via the fault point line parameter input. Type the fault point line parameter and a set of line basic parameters typed via the cable Q impedance parameter input tab. Here, 'further descriptions are made for each data content in the input data group 21': (1) The basic information of the group of devices includes: a generator apparent power (^ Kun, unit is kVA), one Generator rated voltage (vg, unit is v), one generator secondary transient reactance (X"d, unit is %), one generator transient reactance (x, d, unit is %), one generator reactance ( Xd unit is %), one generator secondary transient time constant (T"d, unit is sec), one generator transient time constant (T, d, 7 201043533 unit is sec), a generator DC time constant ( Tdc, unit is sec), one generator stator resistance (Rs, unit is %), one generator frequency (f, unit is Hz), one generator rated current ratio (KKd, in %), one generator power Factor (PF), apparent power of a transformer (str 'unit is kVA), one transformer once measured voltage (Vpri, unit is V), one transformer secondary voltage (Vsec, unit is V), one transformer internal resistance ( Rtr, in %), a transformer internal reactance (Xtr, in %) A motor operating state value, a total motor power (in kW), a motor apparent power (Sim, in kVA), a motor rated current (Iim, in A), a motor short-circuit current AC component (IaClm, The unit is A), a motor short-circuit current value component (Idcim, unit is A), a motor short-circuit current peak (Ipeakim (unit: A), a bus voltage group (including MSB Pri, MSB Sec, eSB Pri, ESB) Sec and F WD, the unit is v), and a line impedance value group (including Rc and Xc, the unit is the resistance value / m). (2) The parameters of the transformer line include: a transformer once measured line diameter (unit is mm2), a transformer secondary test line diameter (unit is mm2), - MU line parallel number ' and - transformer line length (unit is claw ). (1) The line parameters of the fault point of the group include a fault point line diameter (in mm), the number of fault point line parallels, and the length of a fault point line (unit is m). (4) The basic parameters of the line include a line resistance parameter (RC, the unit is the resistance value ~) and - the line reactance value (Xe, the unit is the reactance value / m) e. In practice, the ship short-circuit current detecting device of the present invention In addition to mainly detecting fault current conditions of generators and transformers, it can also be used as input data group as mentioned in 201043533.

It is used to detect the fault current of the motor. Therefore, the group can also include one of the following types, ie, Figure 11), a motor frequency (single 4 resistance (in %), reactance (in %), resistance (unit) For %), one length (in m), one, ! 〇 in ohms, and one motor line reactance (in ohms). Furthermore, if you want to count the grave more accurately.1» ·; go to ΠΛ ΠΛ · a i

Material for more precise calculations. However, the detection function is flexible and selective, and therefore, the application provided by the present invention can also be applied to the inspection of electrical equipment such as emergency generators, emergency motors, other conventional technical fields or future related electrical equipment. Therefore, the state of the present invention is not the focus of the present invention. Therefore, the power device impedance calculation module 12 performs a first operation on the input data group 21 to generate a first operation result 22. In the preferred embodiment, the power device impedance calculation module 12 first determines whether the total power of one of the motors to be calculated is greater than 100 kW before starting the first operation: if 疋', the motor is determined to be large Motor and make the following settings 9 201043533 z M~〇l6p.u. ' T'M = 〇A5p.u. ' Heart=0.034/?.w., 々=0_021;?.w., and M = and s + and r = 0·055pM, o If no, the motor is determined to be a small motor, and Zlw=r02/7W, especially m-〇.188/».w., &=0043;?„,q =〇〇27p, and...=u+)=〇〇7〇p ' and Z”M is the subtransient impedance of the non-synchronous motor, X, M is the subtransient, Rr is the rotor resistance of the non-synchronous motor, and Rs is non- Synchronous motor stator resistance, Rm is motor resistance. However, the first operation described above includes: first, multiplying the line resistance by the line length and dividing by the number of line parallels and dividing by 〗 〖000, and then charging the line, multiplying the line length, dividing by the number of line parallels, and dividing by And calculate the following expression, 'and Z' e and Z'e respectively represent the secondary transient impedance and transient impedance of the generator, = is the secondary transient impedance of the asynchronous motor, and R is the generator to the main busbar = =, Ra is the stator resistance of the synchronous motor, rR is the non-synchronous resistance, Rs is the stator resistance of the asynchronous motor, X is the reactance of the line between the generator and the main bus, X", * the transient reactance of the Xd4 generator, d is the generator:: human transient reactance, χ & is the stator reactance of the non-synchronous motor. (4) The step motor rotor reactance, the combined impedance calculation module 丨3 ^ ^ ^ receives the first operation result 22 and proceeds to the first operation to generate a second operation. The second operation includes the following calculation formula. :. The preferred embodiment is in the line % U0 V3/, ' * Si

i ----- _ machine* + xl· χ:= pull H, =^r^T x: z: X: 'and the aforementioned Z,, * and Z, * minutes 10 201043533 Don't be equivalent generator The transient impedance and transient impedance, ζ* is the equivalent generator impedance, uQ is the line voltage before the fault, f is the frequency of the generator, q is the equivalent - the calculation constant of the human transient reactance, I* is, etc. Effective generator current, wide and 丨, * are the secondary transient short-circuit current and transient short-circuit current of the equivalent generator, R* is the equivalent generator resistance, Tdc* is the non-periodic component time constant, X* is, etc. The effective generator reactance, X"* and X'* are the sub-transient reactance and transient reactance of the equivalent generator respectively.

The generator and motor parameter correction module 14 receives the second operation result 23 and performs a third operation 'generates a third operation result 24. In the preferred embodiment, the third operation includes the following calculation formula:

Iac = IacG' +1acG2 'r^acGn +^acMx -----*" ^acMm '

Jp =IpGl +IpG2 +"' + IpG„ +ΙρΜλ +IpM2 +-- + IpMm ' lac^MGi =1ac~IacGi , for Z· is 1 to Π, —, for z• is 1 to m, ^acG (〇TO = ΣIacG (0 + ΣIacM (0 , IdcG (〇TO = Σ IdcG (Ο + Σ ^dcM ),

IacG(t)*=(I*-I*)et/T^ +(Ii-Ik*)e~t/T^ +Ik*, IdcG = ^IZe^', IacG(0* =M*e~ t/Td* +N*e~tlT,d* +Ik*,Μ*=Γ*-Ι\ > N*=r*-Ik* ' /*= If' h^YTilm ' K(t) = M*et,T^+h ' Κ\ί) = (ϊ^-Ϊ^~ί/Τα* +Ikd*, Κ"(ί)*=Σ?Κ"(ί) + ΣΤΐΜ^/Τ; ίί , ^dcG^fx^* ^dcM^x)j Z* =R* + , X* = -\JZ* — R*, lacGQx, * =M*e tx 丨+N*e txlTh +Ik*,X ,=z^jz* -R*, ^acG (^)* = ^?^acG(fx)i + ^J^acM (fx)j ' = Kp +^+ Rcs

Up V37; Z;

" , worker rJ1 ^ X Q ❽ = ln "n) two / Wm * 1 d, ~ HldcG (tx) J ^ 2r \] * - ~ W:

T d* -, c3 2^d,

And cs = and cs X 11 201043533 χ: X~J^'Rcs ^us xΦ2'<s = x(jr)2' ^ = z/ ' and: Ia. The AC component of the short-circuit current of the symmetrical short-circuit electric synchronous motor at the fault point of the main busbar, the symmetrical short-circuit current of 丨〇G1 - 4, the maximum asymmetric short-circuit of the Ip a~4 (four) step motor & = the asymmetric short-circuit current of the motor The composition is non-same: the asymmetric short-circuit current component of the motive, Ia, and Ip_ are either obstacles: symmetric and maximum asymmetric short-circuit current, Idcc is the short-current non-periodic component fed by the generator, IacM and IdcM The symmetrical and aperiodic short-circuit currents respectively fed by the equivalent motor, the secondary transient short-circuit current and the transient short-circuit current of the equivalent generator, respectively, and T, d· are respectively equivalent generators. Transient time constant and transient time constant, difference between subtransient and transient current, difference between N4 transient current and steady state current, b is the sum of steady state current of synchronous generator, and Ikd is the initial short circuit current of synchronous motor , Z"^ and the same V motor's _ under temporary g initial short-circuit current and transient initial short-circuit current ' Γ' Μ is the non-synchronous motor's secondary transient short-circuit current, κ, is the equivalent generator secondary State The calculation constants of the parameters, 2, * and ζ, respectively, the secondary transient impedance and transient impedance of the equivalent generator, Ζ* is the equivalent generator impedance, υ〇 is the line voltage before the fault, and f is the generator The frequency, q is the calculation constant of the equivalent sub-transient reactance, R* is the equivalent generator resistance, Tde* is the non-periodic component time constant, X* is the equivalent generator reactance, X”* and X,* respectively For the equivalent generator, the sub-transient reactance and transient reactance, RCP and r, cs are respectively measured and converted to one test. 12 201043533 Ο II: Measure line resistance, ... bus bar and fault block algebra sum, RtA総Desperate electric knife sighs the electric power to prepare the mine: h D * " and, 々 between the main bus and the fault point, all the sighs of the reactance algebra and 蛊 cp /, / knife is once Measure and switch to - / J one - human measurement line reactance, χ change 厐 kt kt is change I device reactance, UP and us respectively 4 / human measurement and secondary measurement voltage, t is short circuit start period, 1 For the defined ugly road start period, 1S is the transformer secondary side current. The short-circuit current calculation module 15 receives the third operation result 24 and proceeds to a fourth operation to generate an output result group 25. In the preferred embodiment, the fourth operation includes the following calculation formula: J^a + ^) 2 + (Z", +Z) 2] z', rr i^+WH^d+x) (x 'd+x)^;' 4=E;lz:Ujz'e, Γ"

ΧΜ <〇rRR

T, ^Τ^+(Χ/2π/^) Χ\+χ Ce 1 + (Λ/Λα) ~^f(Ra+R)' 7Ρ〇(0 = ν2/Λε(0 + /^(/&gt ; TdcK (and s+R) 〇

IacG^ = ^kd-I'kd)e~tlT e+(,1^-1 kd)e~tlT,e +1kd ' IacM(.t) = Inm ^~tlT"M !(ίαΜ(ί) = ^ (ΓΜ -IrM sin^M)e~t/TdcM ' 1 pM (f) = ^acM (*) + IdcM (11) ' Γ'μ = 5 /,

^rM ' ^acM =3-2 Ir^ Λ IpU =8 IrU £;〇-

E 9〇 |^^rC〇s". +(i?a+7?)/. + jsin more. +(X:+X)J0 〔戈 cos#. + (especially +Λ)/. j +[戈 sin#. +(X: +X)/0 U〇 , 2. / 1/2 1/2 1/2 u

rM svr eos^ —/?M/

rM cos φΜ —

rM

U

rM 4ϊ smφM -Xnul

rM ~sin mu s 1/2 13 201043533 τ_Ε„ ' and the aforementioned r is the resistance of the line between the generator and the main bus, Ra is the stator of the synchronous motor, and γ X is between the generator and the main bus The reactance of the line, x'd is the transient reactance of the generator, x, d is the secondary transient reactance of the generator, Xd is the generator reactance, f is the frequency of the generator, and u0 is the line power before the fault, ~ and rkd are the secondary transient initial short-circuit of the synchronous motor:: and the transient initial short-circuit current, z' and z, e respectively indicate the secondary reactance of the generator and the temporary I resistance k, iaeG is the symmetry of the synchronous motor feed The short-circuit current is the non-periodic component of the short-circuit current fed by the generator, the IPG is the asymmetric short-circuit current component of the same 2 engine, and t is the symmetrical short-term 丄 of the fault point of the main row of the short-circuit during the short-circuit start period. „ . The short flow of the fault point of the main busbar, Rr is the rotor resistance of the non-synchronous motor, Rs is the non-synchronous motor, the electric resistance of the rotor is 'U is the rated current of the motor, ... is the fixed electric power~ is the equivalent electric non-periodic moment pathΜ ^ (4) Lang is more symmetrical and E, eight, % m ',, the largest asymmetry Short-circuit current, E"m fish two-knife is the secondary transient and initial, short-circuit current, τ, 'm is the secondary transient constant constant, X"...V is the secondary transient respectively d: is the direct "internal motor reactance, rm is the motor resistance, Erf', XM is the non-synchronous transient and transient q-axis internal potential, 0. The second and / knives are not generators ~ all are motor power factor, z,, non- ά, SIN ~ and cos, for, the secondary transient impedance of the synchronous motor 〃 ", T'd respectively for the synchronous motor The time constants, T''e and T'e of the subtransient and transient 14 201043533 are the subtransient and transient time constants of the synchronous motor including the inactive components, respectively, and the DC time of the synchronous motor including the inactive components. In addition, in the preferred embodiment, the output group 25 generated by the short-circuit current calculation module after the operation includes: a set of device symmetrical short-circuit current, a device peak short-circuit current, and a set of faults. Point symmetrical short-circuit current 'and a set of fault point peak short-circuit current. It is necessary to add that 'the ship short-circuit current detecting device of the present invention is in the above preferred embodiment, only for one generator, one transformer device or A motor performs short-circuit current detection as an example. However, in actual operation, multiple generators, transformer devices, or motors can be detected at the same time. The number of such detections has an associated back. It is not limited to the specific examples of the preferred embodiment.

Herein, in order to further illustrate the effects of the present invention, the following will be directed to including a generator, an emergency generator, a transformer device, a motor group, and setting multiple sets of fault points (numbered MG, MEG, MA, MB). For example, MC 〇, MD, ME, MF, ΜΗ, MI, MJ, and MK) are used to perform actual detection and analysis by the ship short-circuit current detecting device of the present invention, and the related input data are as shown in FIGS. 12 to 17 and Figures 18a through 18h, and the associated output result groups are shown in Figures 19a through 19d. Finally, 'comparing the aforementioned output result group with the relevant data calculated by the current system' can give the following advantages of the present invention:) Considering the pre-fault generator load effect, the transient attenuation of the AC component, and the motor energy The conversion efficiency, the short-circuit current fed by the shaft power generation system 15 201043533, and the influence of the electroosmotic operating temperature are determined by t, resulting in a relatively accurate short-circuit current. The short-circuit current calculated by τ () jin 10 has a large result, so the more conservative estimation 'has a large short-circuit load capacity for the design of the ship power system, and reduces the damage risk caused by the short-circuit current. ^ (3) The system voltage is increased, which is extremely beneficial for reducing the short-circuit current. As a result, the volume and weight of the ship-related protection switchgear can be reduced, which in turn contributes to the planning and design of the ship's power protection equipment. In summary, the ship short-circuit current detecting device of the present invention can achieve the object of the present invention. However, the above is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, that is, the simple equivalent changes and modifications made by the scope of the present invention and the description of the invention. All remain within the scope of the invention patent. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing the arrangement of components and their operational aspects in a preferred embodiment of the ship short-circuit current detecting device of the present invention; FIG. 2 is a schematic view showing the preferred embodiment In the preferred embodiment, a generator parameter input page is shown in FIG. 3; FIG. 4 is a schematic diagram showing a transformer parameter input page in the preferred embodiment. FIG. 5 is a schematic diagram showing a motor parameter 16 201043533 input page in the preferred embodiment; FIG. 6 is a schematic diagram showing a bus voltage input page in the preferred embodiment; FIG. 7 is a schematic diagram. In the preferred embodiment, a line impedance input page is shown; FIG. 8 is a schematic diagram showing a transformer line parameter input page in the preferred embodiment; FIG. 9 is a schematic diagram showing the preferred embodiment. Fault dotted line & road parameter input paging;

FIG. 10 is a schematic diagram showing a cable impedance parameter input page in the preferred embodiment; FIG. 11 is a schematic diagram showing a basic parameter input page of the motor in the preferred embodiment; FIG. 12 to FIG. 18a to 18h are schematic diagrams showing the relevant input data entered in the actual detection of the ship short-circuit current detecting device of the present invention in the preferred embodiment, and FIG. 19a to FIG. 19d are schematic diagrams illustrating the comparison. In a preferred embodiment, a group of output results is calculated when performing the actual detection of the ship short-circuit current detecting device of the present invention. 17 201043533 [Description of main component symbols] 11........ • Human machine interface 21 ·_··. Input beaker group 12........ • Power equipment impedance meter 22... .. •...The first operation result calculation module 23 ..... •...The second operation result 13........ •Synthetic impedance Η*Different mode 24 •...The third operation result group 25 •... · ...· · Output result group 14........ • Generator and motor 3... User parameter correction module 15... Short-circuit current calculation module 18

Claims (1)

201043533 VII. Patent application scope: 1. A ship short-circuit current detecting device, comprising: a power equipment impedance calculation module, performing a first operation on a wheel-person data group to generate a first operation result; - combining = impedance The computing module 'receives the first operation result and performs a second operation to generate a second operation result; a generator and motor parameter correction is exclusive, receiving the second operation result and performing a third operation to generate a third The operation result·, and the 〇-short-circuit current calculation module, receives the third operation result and performs a fourth operation to generate an output result group. 2. According to the ship short-circuit current detecting device described in the scope of claim patent item i, wherein the input data group required for the calculation of the impedance calculation module of the power device comprises: group device basic data, - group transformer line parameter, - group Fault point line parameters, and a set of line basic parameters. 3_ According to the invention, the short-circuit current detection splitting of the ship according to item 2 of the patent scope, wherein the basic data of the set of equipment in the input data group includes: 视 generator apparent power, a generator rated voltage, one Generator secondary transient reactance, one generator transient reactance, one generator reactance, one generator secondary transient time constant, one generator transient time constant, one generator DC time constant, one generator stator resistance, one Generator frequency, a generator rated current ratio, a generator power factor, a transformer apparent power, a transformer primary measurement voltage, a transformer secondary measurement voltage, - transformer internal resistance, a transformer internal reactance, a motor operating state Value, total motor power, motor apparent power, motor rated current, 19 201043533 motor circuit current AC component, a motor short circuit current value component, a motor short circuit current peak, a bus voltage group, and a line Impedance value group. 4. The ship short-circuit current detecting device according to claim 2, wherein the set of transformer line parameters in the input data group comprises: a transformer primary measuring line diameter, a transformer secondary measuring line diameter, a transformer The number of lines connected in parallel, and the length of a transformer line. 5. According to the ship short-circuit current detecting device described in item 2 of the patent scope, in the 'input data group, the set of fault point line parameters: including - fault point line port 彳 ^ series point line parallel number point line length. Fault 6· According to the invention, the ship short-circuit current detecting device described in the second paragraph of the invention has the line resistance parameter and the line reactance value of the group of the line data in the input data group. 7.·According to:: Please refer to the ship short-circuit current detection in the second paragraph of the patent scope. The group required for the calculation of the impedance calculation module of the power equipment also includes a set of motor spring number parameters, and the group Motor parameters and right - rated voltage, a motor frequency eight motor resistance, one, reach:: a motor power factor, a motor rotor corpse m "motor rotor reactance, a motor stator reactance, a motor total reactance, - long Ten Geng, __ a, go #, , ', live, - motor line county, a motor line parallel number | long W chat number, a motor line resistance line reactance. ^ Motor 8 · according to the scope of patent application 7 . ^ 嗦 The ship short-circuit current detection bran, wherein the set of motor parameters also has a motor transformer resistance, - ~ * Ma 20 201043533 up to transformer reactance, a motor transformer once rated voltage, and a motor transformer The rated voltage is measured twice. 9. According to the ship short-circuit current detecting device described in item i or 2 of the U-profit range, in the middle, the short-circuit current calculation module is generated after the calculation. The output result group includes - group device symmetrical short-circuit current, - group device sound value short-circuit current, - group fault point symmetrical short-circuit current, and - group fault point peak short-circuit current. 10. According to the patent scope of items 2 to 9 The ship short circuit electric power detecting device described in the above--the 'the power device impedance calculation module performs the first operation on the input data group, including H multiplying the line resistance by the line length and dividing by The number of parallel lines is divided by 10 (10) and then the line reactance is multiplied by the line length and then divided by the number of lines connected to divide by 1000, and the following computational core team w+m+x)2]"2, Ze-[ (Ra+R) +(^+^)2]172 . =[(RR+Rs+Rf+^XR+Xs+x)j2^/2 , and z''e and Z'e represent the number of generators respectively Transient impedance and transient impedance, Z"M is the sub-transient impedance of the asynchronous motor, r is the resistance of the line between the generator and the main bus, Ra is the stator resistance of the synchronous motor, and Rr is the rotor of the asynchronous motor Resistance, Rs is the stator resistance of the non-synchronous motor, X is the reactance of the line between the generator and the main bus, x, d is the hair The anti-transient motor, x''d subtransient reactance is the generator, Xr asynchronous motor rotor reactance, Xs asynchronous motor stator reactance. 11 _ According to the ship short-circuit current detecting device described in the patent application scope, wherein the second operation performed by the synthetic impedance calculation module on the first operation result includes the following calculation formula: 21 201043533 Impedance and transient resistance are the non-periodic component time constants, and X * are the sub-transient reactance and transient reactance of the equivalent generator, respectively. The motor impedance, Uq is the line voltage before the fault, f is C3 is the calculation constant of the equivalent sub-transient reactance, 1+ is 1 * and r * is the sub-transient short-circuit current of the equivalent generator, R* is equal, etc. Effective generator resistance, Tdc* between ten, X* is the equivalent generator reactance, X,, * and 12_ according to the ship short-circuit current detecting device of the application scope of the application, the 'generator and The third operation performed by the motor parameter correction module on the second operation result includes the following calculation formula: lac^lacGx + IacG2 +-" + 1〇〇0„ +I〇cMx +IacM2 +- + IacMm ' Ip +IP〇2 +"' + IpGn +IpMl +IpM2 +'" + IpMm ' Iac_MGi=Iac~'IacGi , for ί is 1 to n, /p_MGi = /p_/, for 1 to m, ^ acG(0ΤΟ ^acG(〇+ Σ^acM (0 , IdcG^TO ~T.^dcG(〇+ ^^dcM(〇, JacG{t)*=(I*-l*)e'tird* +( /i-Ik*)e~t/Td* +/^ , ldcG=4ine-^IT^ , called +N*e_called +Ik* ' Μ*=Ι\-Γ* ' N*=l\- Ik* ' ' Ι^=Σ?Ϊμ ' Ik*=ZPkdi ' K(t) = Me-t,T^+h , κ\ί) = {ίΜ-ϊΜ)β-ίΙτ^ +/ω* ' / τ(〇*=ΣΓ 尤〃 W + ΣΓ1心'巧, W(^x)* =If^cG(^)i +S7W(^)j ' Z*"R?+X^,X'*=Buck 2-0, JacGitx)* =M*e'txlT5* +N*e~txlT,d* +Ik* ' Z* =^zf^ ' ^acG(?jc)* = Xf-^acG(^)/+Σ7^«<;Μ(^)7 ' Re = Rcp + R, + Ks ' 22 201043533 rrtft Jd* Ζ, =-"0—, 2 一"〇U. υ :(—^-)2' χ' U } V . (—^yu ) Ο Ο ζ*Ί,~~ύ:κ ' Xt= ^cp+Xl+X'cs> !S=I , and 1 "symmetric short-circuit current of the main bus fault point, 〗 〖An Wei's thunder" aa·- a acGl~η is the same, short circuit current of the motor The symmetrical short-circuit current of the AC machine, Ip A aeM1~m is the non-synchronous electric short circuit method τ The maximum asymmetry of the main sink to the fault point (9) PG1~n is the synchronous motor short-circuit current component, TPM, ~m The asynchronous short-circuit current component of the asynchronous motor, IaeM(1) and P-MGi are respectively the fault point symmetry and the maximum asymmetric short-circuit current, and 1(4) is the short-circuit current non-periodic component uu of the generator. The symmetry of the equivalent motor feed is respectively With the non-periodic short-circuit current, 2 I* is the equivalent transient short-circuit current and transient short-circuit current / J, LT d * and T'd * are respectively the secondary transient time constant of the equivalent generator Transient time constant, difference between subtransient and transient current, N* is the difference between transient current and steady state current, 1]^ is the synchronous generator steady state The sum of the flow, Ikd is the initial short-circuit current of the synchronous motor, I"kd and I, kd are the secondary transient initial short-circuit current and the transient initial short-circuit current of the synchronous motor, respectively, Γμ is the secondary transient short-circuit current of the asynchronous motor, κ" The calculation constant for the equivalent generator secondary transient time parameter, Ζ"* and Ζ'* are the secondary transient impedance and transient impedance of the equivalent generator, Ζ* is the equivalent generator impedance, Uo is 23 201043533 Fault line voltage, f Φ4 fcx: + f is the frequency of the generator, c3 is the calculation constant of the equivalent temporary bear reactance ' R * is the equivalent generator resistance, Tdc * is the non-periodic component time constant, X * For the equivalent generator reactance, χ' and χ, * are the equivalent transient reactance and transient reactance of the equivalent generator, RCP Xiao R, cs are respectively measured and converted to the secondary measurement line resistance of one measurement, ^All electrical equipment resistance algebra sum between the main bus and the fault point, & the resistance of the transformer, the force of the main bus and the fault point between all the power equipment reactance algebra sum, Xcp and X, cs are one test and Switch to the secondary measurement line reactance, Xt Reactance transformers, Up and Us are changed it is - and the secondary side voltage measurement time, t is the short circuit period starts, G is defined as the period of the short circuit starts, Is a secondary side current of the transformer. 13. The ship short-circuit current detecting device according to claim 12, wherein the fourth operation performed by the short-circuit current calculation module on the third operation result comprises the following calculation formula: R)2+{Χ \+Χ){Χ' τ\ ^kd = ~ E'^jZ^ ' Τ'M --- G>rRR = . l(^g + ^)2 + (jr, +x)2 krf rd Factory e ~ + RY + (Td+ x)(xd + U = gamma L-h&S-, T _T<ic+(XI2KfR„) factory x (10) one = ^7^, . machine (,) +4 W, "= ^cGiO^^kd-I 'kd)^11 e/T,e+Ikd ' JacM(t) = r,M e~t/T^ ' I dcM=core (Jh -1 rM M, 〆丨T marriage, I pM (f) = Yfil acM (f) + I dcM (t), Γ, Μ^5 lrM ' IacM =3·2 lrM ' = 8 IrM ' (UQ V frr , 2. -^C〇s^0 +(i?fl + /?)/〇1(^+/?)2+(χ",+χ)2 |λγ· 1/2 E' rsin4+(^+Z)/〇24 201043533 Ε: E' I'm cos A+( Ra+R)10 + ^|sin^〇+^)/, QOS φΜ-ΚΜΙκ U. s ύηφΜ-Χ”Μΐτ U. S cos φΜ-ΚΜΙκ K [fi?, +Rs + Rf + (XR + ^ + X)2 ]= Ζζ 1/2 1/2 f U ▽ -^^Φμ-ΧμΚμ K 1/2 Ο Ο 'and R is the resistance of the line between the generator and the main bus, and Ra is the stator of the same motor Resistance, X is the reactance of the line between the generator and the main busbar, X'd is the transient reactance of the generator, X, d is the secondary bear reactance of the generator, Xd is the generator reactance, and f is the generator Frequency, the line voltage before the fault I, kd and I, kd are the secondary transient initial short-circuit current and transient initial short-circuit current, z, e and z, respectively, of the synchronous motor. The e represents the secondary transient impedance and transient impedance of the generator, and IacG is Synchronous motor = symmetrical short-circuit current component sent, IdeG is the short-circuit current fed by the generator = aperiodic component, IPG is the asynchronous motor short-circuit current component, t is the short-circuit start period, Iae is the symmetrical short circuit of the main bus fault point The knife currents t and Ide are the non-periodic short-circuit currents of the main bus fault point, ~ is the non-synchronous motor rotor resistance, RS is the non-synchronous motor stator electric power, and the motor rated voltage, IrM is the equivalent motor rated current, la μ and ^The symmetrical and aperiodic short two I of the equivalent motor feed are respectively: the gate I is the maximum asymmetric short-circuit current, E"..., M is the short circuit respectively: 4 the secondary transient and the transient internal potential of the motor, rm is Initial symmetric short-circuited electric steam 25 201043533, τ''Μ is the sub-transient time constant, τ dcM is the DC time constant, χ, Μ and X'M are the sub-transient and transient reactance respectively, and the motor is non-synchronous The reactance of the machine, RM is the motor resistance, E, 'q0 and Ε, and the eight w from Xing t qG are the q-axis internal potential of the generator transient and transient, respectively, and the phase angle is SIN^A/ and COS7 Both are motor power factor, Z"M is the secondary transient impedance of the non-synchronous motor, called 2", D and T'd are the time constants of the transient and transient of the synchronous motor, respectively, T, e and T'e respectively is the secondary transient and transient time constant of the synchronous motor including the inactive component, and the number Tdce is the DC time constant of the synchronous motor including the inactive component. 14 - The ship short-circuit current detecting device according to the scope of claim 13 of the patent application, wherein the electric power device impedance calculation module calculates the first calculation before starting the first operation (4) Power ^ is greater than ι〇〇 kW' If yes, determine that the motor is a large stable, and make the following settings ^^ = 0.16 material, 1, from = 0, 5 correction, % = 〇〇 34 A, heart = 〇 Friends and Μ = heart +1⁄2 =0·〇55ρ. 'If no, then the motor is determined to be a small motor, and set Z, V = 0_2 (four), Ζ " Μ = 仰 仰 咖 咖 ( ( ( ( ( ( ( ( ( , and W =3⁄4 +4 =〇.〇7〇P_ 'and z”M is the non-synchronous motor subtransient impedance X m is - human transient, Rr is non-synchronous motor rotor resistance, rs is non-synchronous motor stator resistance Rm is the motor resistance. 15_ The ship short-circuit current detecting device according to claim 14 further includes a human-machine interface 'receiving a user's input, generating the data group and transmitting to the power device impedance calculation Module. Into 26