CN104868538B - The storage capacitor and filter inductance, electric capacity of a kind of energy storage demagnetization power supply determine method - Google Patents

Abstract

Storage capacitor and filter inductance, electric capacity the invention discloses a kind of energy storage demagnetization power supply determine method, and step is as follows：(1) pulse theory energy balane, is carried out；(2) the monomer series-connected number of rated voltage and electric capacity of storage capacitor module, is determined；(3), calculate and meet all pulse request storage capacitor capacity with power station power supply power match；(4), storage capacitor module number and rear class converter are grouped, and pulsed discharge scheme is formulated according to group result；(5) step by step calculation, is carried out according to discharge scheme, suitable filter inductance, capacitance is obtained.The present invention uses multiple redundancy mechanism, it is ensured that all Safety Redundancy inside total output circuit and converter.Low current specific group ensure that the precision of small-pulse effect electric current, also reduce the total inductance value of filter inductance, reduce installation cost.

Description

The storage capacitor and filter inductance, electric capacity of a kind of energy storage demagnetization power supply determine method

Technical field

The invention belongs to ship degassing field, the storage capacitor and filter inductance of more particularly to a kind of energy storage demagnetization power supply, Electric capacity determines method.

Background technology

The earth is a huge magnet, and steel is the material being easily magnetized, and the naval vessel or submarine that steel is built are long-term In magnetic field in the earth, it will be magnetized.As long as ship navigating is on ocean, the naval vessels being magnetized must just produce magnetic , if not eliminating this magnetic field, the naval vessels being magnetized are highly susceptible to the weapon attackings such as magnetic mine, torpedo, or turn into The target of magnetic detecting equipment.Naval vessels have two magnetic fields in itself, and one is induced field, and this magnetic field is by selfdemagnetization system on naval vessels System is offset；Another is fixed magnetic field, and this magnetic field will then lean on degaussing stations or the degaussing ship periodically to carry out energization elimination to it.

The most effective means that eraser system is ship magnetic protection are installed on naval vessel.Purpose is prevention enemy's magnetic weapon Attack and magnetic detecting improve the vitality on naval vessel, ship deperming system it is main by degaussing winding in warship, Degaussing Control Equipment and Demagnetization power unit is constituted.Demagnetization power supply is the power amplifier device of Deperming Facility, it press controller output control signal to Ship deperming winding provides direct current controllable current, is the important component of Deperming Facility.Demagnetization power supply is typically used in army Naval vessel, on submarine, it is necessary to have high reliability, particularly in wartime.Relying on super capacitor energy storage and power station power supply Demagnetization power supply in, have two energy sources to pulsed discharge provide energy, one is power station, and one is super capacitor.Pulse is put Electric flux summation is constant, increases super capacitor capacity, it is possible to reduce the power in power station；Otherwise increase station capacity can To reduce the capacity of super capacitor.The group number of the power in power station and super capacitor must reasonably be designed, make power station and Super capacitor capacity obtains splendid matching, impact during reduction demagnetization power initiation to power network, while must assure that demagnetization electricity Source electrode reliability high, redundancy.

The performance requirement in magnetoelectricity source is offseted for more than, proposes that one kind ensure that demagnetization power supply possesses high redundancy reliability The storage capacitor capacity and filter inductance, the determination method of electric capacity of property are very necessary.

The content of the invention

Technical problem：Present invention offer is a kind of can be obtained and prime according to different demagnetization power pulse parameter requests The storage capacitor capacity that power station power matches, and meet the requirement of each pulsed discharge rear class converter filter inductance, Electric capacity determines method.The method is devised using the electric capacity module discharge scheme of multiple redundancy mechanism, not only causes total filtered electrical Sensibility reciprocal reduction, it is often more important that drastically increase the reliability of demagnetization power supply, more meet military project demand.

Technical scheme：The energy storage demagnetization power supply that the inventive method is directed to is by rectifier, charge controller, storage capacitor mould Group, rear class constant-current converter, electric current reversing arrangement, system monitor composition；Rectifier, charge controller, storage capacitor module, Rear class constant-current converter, electric current reversing arrangement sequential concatenation, system monitor is by order wire and charge controller, storage capacitor Module, rear class constant-current converter, the communication of electric current reversing arrangement；Demagnetization power-supply system receives the alternating current energy of AC power station, warp After the links such as over commutation, energy storage, conversion, commutation, for the intermittent pulse current that load provides positive and negative alternating, progressively decays.

The storage capacitor and filter inductance, electric capacity of energy storage demagnetization power supply of the invention determine method, comprise the following steps：

(1) the 1st pulse of energy storage demagnetization power supply to the cumlative energy E of i-th pulse is calculated_i, concrete mode is：

According to formula I_i=I₁×(1-k_ΔI)^i-1The theoretical discharge electric current I of i-th pulse under gauge index damped manner_i, Or according to formula I_i=I₁- (i-1) × Δ I calculates the theoretical discharge electric current I of i-th pulse under equal difference damped manner_i；

According to formula U_i=I_i×R_LCalculate the theoretical discharge voltage U of the pulse_i, according to formula P_i=U_i×I_iCalculate the The i theoretical discharge power P of pulse_i, according to formula Q_i=P_i×T_onCalculate the theoretical energy Q of i-th pulse_i, according to formulaCalculate the cumlative energy E from the 1st pulse to i-th pulse_i；

Wherein, i is pulse sequence number, 1~N of span_pulse, N_pulseIt is pulse sum, I₁Headed by pulse theory electric discharge electricity Stream, k_ΔIIt is pulse current exponential damping coefficient, Δ I is electric current equal difference decay tolerance, R_LIt is load resistance, T_onIt is individual pulse Discharge time, i.e. pulse width, j are all pulse sequence number, 1~i of span；

(2) the monomer series-connected number of rated voltage and electric capacity of storage capacitor module is determined, concrete mode is：

According to formulaCalculate i-th when rear class converter uses step-down mode The storage capacitor module electric discharge minimum voltage U that individual pulse is allowed_ic-b-min, or according to formula U_ic-b-min=[(1-d_b-b-max)×U_i ÷d_b-b-max+Δu]×k_RThe storage capacitor module that i-th pulse is allowed when rear class converter uses buck mode is calculated to discharge Minimum voltage U_ic-b-b-min；

The rated voltage U of storage capacitor module is determined in such a way_c-N：According to formula U_c-N-b=U_1c-b-min× K_safe-u-bCalculate the rated voltage U of storage capacitor module when rear class converter uses step-down mode_c-N-b, or according to formula U_c-N-b-b =U_1c-b-b-min×K_safe-u-b-bCalculate the rated voltage of storage capacitor module when rear class converter uses buck mode U_c-N-b-b, or directly take rated voltage U_c-N-b-b=U_c-N-b；

According to formula N '_series=U_c-N/U_c-single×K_{c-nonuniformity}The electric capacity for calculating storage capacitor module is monomer series-connected Number N '_seriesIf, N '_seriesIt is not integer, then amendment is rounded to positive infinity direction to it, obtains revised energy storage The monomer series-connected number N of electric capacity_series；

Wherein, d_buck-maxIt is the maximum duty cycle of switching tube under step-down mode, d_b-b-maxIt is switching tube under buck mode Maximum duty cycle, Δ u be converter input and output voltage difference compensation, k_RIt is storage capacitor internal resistance and electric transmission copper row pressure drop system Number, U_1c-b-minThe storage capacitor module electric discharge minimum voltage that first pulse is allowed when using step-down mode for rear class converter, K_safe-u-bStorage capacitor module rated voltage safety coefficient, U when using step-down mode for rear class converter_1c-b-b-minFor rear class becomes The storage capacitor module electric discharge minimum voltage that first pulse is allowed when parallel operation uses buck mode, K_safe-u-b-bFor rear class is converted Storage capacitor module rated voltage safety coefficient, U when device uses buck mode_c-NIt is the rated voltage of storage capacitor module, i.e., U_c-NIt is U_c-N-bOr U_c-N-b-b, K_{c-nonuniformity}It is the monomer series-connected voltage nonuniformity coefficient of storage capacitor, U_c-singleIt is energy storage electricity Hold monomer pressure voltage；

(3) the storage capacitor capability value c ' of primary Calculation and power station power supply power match_sum, concrete mode is：

According to formula W_1c-offer=Q₁-W_g-on-maxCalculating storage capacitor module needs to the energy of first pulse supply W_1c-offer, further according to formulaPrimary Calculation goes out and power station power supply power P_gridPhase The storage capacitor capability value c ' for matching somebody with somebody_sum；

Wherein, U_1c-minHeaded by pulse allow storage capacitor module discharge minimum voltage, η_c-loadIt is storage capacitor module To the efficiency of load discharge, Q₁Headed by pulse theory energy, W_g-on-maxFor power station during pulsed discharge it is interior to pulse supply Ceiling capacity, by formula W_g-on-max=P_grid×T_on×η_g-loadIt is determined that, η_g-loadIt is power station through prime charge controller and rear class Efficiency of the constant-current converter to load energy supply；

(4) counted storage capacitor capability value c ' preliminary to the step (3)_sumVerification amendment is carried out, and determines energy storage electricity Molar group parallel branch number N_c-sum；

(5) to storage capacitor modules in parallel circuitry number N_c-sumIt is modified and is grouped, concrete mode is：

The way N of rear class converter is used according to demagnetization power supply_converterBy N_c-sumThe storage capacitor of group parallel branch composition Module has altogether and is divided into N_converterGroup, every group includes N_parallel=N_c-sum/N_converterThe single storage capacitor working group of group, N_parallel1 positive integer should be greater than, and the single storage capacitor working group number of each road rear class converter configuration is consistent, such as Fruit N_parallelAbove-mentioned two requirement is unsatisfactory for, then to storage capacitor monomer capacity c_singleAfter being modified according to the following formula, step is returned Suddenly (4)：c_single=c_single×k_c-single, wherein k_c-singleIt is storage capacitor monomer cubage correction coefficient；

If N_parallelMeet above-mentioned two requirement, then by N_parallelThe single storage capacitor working group of group is electric and is unified into Capacitance is c_{single-module}=N_parallel×c_single/N_series, rated voltage be U_c-NStorage capacitor working group, behind The storage capacitor working group for obtaining will be grouped；

(6) process of pulse discharge design is carried out, concrete mode is：

As the theoretical discharge electric current I of i-th pulse_iMore than I₁When/2, X normal work group all participates in electric discharge；

As the theoretical discharge electric current I of i-th pulse_iMore than I₁/ 4 and be less than I₁When/2, by comprising X/2 storage capacitor work Big group of work group is discharged；

As the theoretical discharge electric current I of i-th pulse_iMore than I₁/ 8 and be less than I₁When/4, by comprising X/4 storage capacitor work The group of work group is discharged；

As the theoretical discharge electric current I of i-th pulse_iLess than I₁When/8, discharged by single low current specific group, now, If be more than to the ceiling capacity that all storage capacitor working groups of i-th pulse power supply can discharge individual from i-th (i ＜ x-1) To the pulse energy sum of -1 pulse of xth, then power station just no longer provides any energy to storage capacitor and load, and wherein x is The 1st sequence number of pulse that low current specific group is powered；

(7) process of pulse discharge calculating is carried out, concrete mode is：

According to formulaCalculate storage capacitor after i-th pulsed discharge The energy Q of working group's storage_i-after, according to formulaCalculate energy storage after i-th pulsed discharge The voltage U of electric capacity working group_i-afterAccording to formula, Q_i-before=Q_i-1-after+W_g-off-oneStored up before calculating i-th pulsed discharge The energy Q of energy electric capacity working group storage_i-beforeIf, Q_i-beforeMore than the maximum storage energy of storage capacitor working group Q_one-max, then according to Q_i-before=Q_c-one-maxAmendment Q_i-before；

According to formulaThe electricity of storage capacitor working group before calculating i-th pulsed discharge Pressure U_i-before, for the voltage U before first pulsed discharge_1-beforeWith putting for the 1st pulse x powered by low current specific group Storage capacitor working group voltage U before electricity_x-beforeBy formula U_1-before=U_x-_before=U_c-NCalculate, this two pulsed discharge it The energy of preceding corresponding storage capacitor working group storage presses formula Q_1-before=Q_x-before=Q_c-one-maxValue, according to formula I_i-single=I_i/M_iThe electric current that single channel rear class converter flows through when calculating i-th pulsed discharge；

Wherein, Q_i-beforeIt is the energy of storage capacitor working group storage before i-th pulsed discharge, M_iIt is i-th pulse The storage capacitor working group group number of energy supply, M are participated in during electric discharge_iValue is X, X/2, X/4 or 1, W_g-off-oneFor power station is put in pulse The energy provided to storage capacitor working group in electric interval time, as normal group electric discharge and Q_i-c-M×η_c-load≥K_Q× Q_{i-sum-back-x-1}When or low current specific group discharge when W_g-off-one0 is taken, by formula W in the case of other_g-off-one=P_grid×T_off ÷X×M_i×η_g-cCalculate, Q_i-c-MM during for i-th pulse_iThe ceiling capacity that individual storage capacitor working group can discharge, by formula Calculate, Q_{i-sum-back-x-1}It is from i-th pulse To all pulse energy sums of -1 pulse of xth, K_QFor storage capacitor independently discharges safety coefficient, W_g-on-offerIt is power station in arteries and veins The energy of supply pulse in the impulse electricity time, likewise, in normal group electric discharge and Q_i-c-M×η_c-load≥K_Q×Q_{i-sum-back-x-1}When Or during the electric discharge of low current specific group, W_g-on-offer0 is taken, W is taken in the case of other_g-on-offer=P_grid÷X×M_i×T_on×η_g-load, Q_c-one-maxBy formulaCalculate；

(8) filter inductance and filtering capacitance are asked for according to process of pulse discharge result of calculation.

Further, the particular content of step (4) is：

A) since first pulse, the ceiling capacity that power station can be provided in discharge interval and pulsed discharge phase The interior ceiling capacity sum W that can be provided_g-offer-max=W_g-off-max+W_g-on-maxWith the theoretical energy Q of each pulse_iCompare, Until W_g-offer-maxMore than or equal to the theoretical energy Q of i-th pulse_iUntill, then obtain to c '_sumEach circulation of verification The pulse number N that needs are verified_check=i-1；

B) it is c ' by a capacity_sum, rated voltage be U_c-NStorage capacitor as demagnetization power supply energy storage module, it is and right This module carries out that calculating is gradually discharged；

C) whether voltage after this energy storage module every time electric discharge is met more than or equal to the pulse being calculated in step (2) The storage capacitor module electric discharge minimum voltage of permission is verified, if be unsatisfactory for, according to c '_sum=c '_sum×(1+ K_{c-sum-correction}) amendment c '_sumAfterwards, return to step b), until preceding N in epicycle verification_checkThe storage capacitor that individual pulse is allowed Module electric discharge minimum voltage be respectively less than or equal to voltage after the electric discharge of energy storage module untill, and enter step d)；

D) according to formula N '_c-sum=(N_series×c′_sum)/c_singleCalculate storage capacitor modules in parallel circuitry number initial value N’_c-sum, by N '_c-sumIt is multiplied by K_safe-c-NAnd round, just obtain and power station power P_gridThe storage of the certain Safety Redundancy of consideration of matching Can electric capacity module parallel branch number N_c-sum, then obtain considering the storage capacitor capacity C of certain Safety Redundancy_sum=N_c-sum× c_single÷N_series；

Wherein, W_g-off-maxThe ceiling capacity of storage capacitor module is supplied in discharge interval for power station, by formula W_g-off-max=P_grid×T_off×η_g-cIt is determined that, T_offIt is discharge interval time, η_g-cFor power station through prime charge controller to The efficiency that storage capacitor module charges, K_{c-sum-correction}It is the storage capacitor cubage correction coefficient for needing, c_singleIt is preliminary choosing Fixed storage capacitor monomer capacity, K_safe-c-NIt is storage capacitor module number Safety Redundancy coefficient, its value is more than 1.

Further, the storage capacitor working group in step (5) as follows to obtaining is grouped：Will N_converterIndividual storage capacitor working group is divided into X normal work group and Y redundancy of effort group by " X+Y " scheme, each work Group constitutes an independent module, and each module configures independent charger and independent rear class converter, and rear class converter is simultaneously The backward load of connection provides pulse current, and X normal work group is divided into two big groups, and each big group has X/2 storage capacitor Working group, then a big group is divided into Liang Ge groups, there are X/4 storage capacitor working group, Y redundancy of effort group in each group Respectively constitute Y low current specific group, wherein Y >=2, X+Y=N_converter。

Further, in step (8), rear class converter does not use crisscross parallel circuit, and filtering is asked for as follows Feel and filtering Shen capacitance Shen：

According to formulaRear class converter is calculated using step-down mode The minimum filter inductance L of continuous current mode is met during lower i-th pulsed discharge_i-Lvbo-buck, or according to formulaRear class converter is calculated using i-th pulse under buck mode The minimum filter inductance L of continuous current mode is met during electric discharge_i-Lvbo-b-b；

To array [L_1-LvboL_2-Lvbo…L_x-1-Lvbo] take maximum and be worth to the corresponding inductance value L of normal work group_normal, it is right ArrayTake maximum and be worth to the corresponding inductance value of low current specific group L_special, minimum inductance L during by the mode of step-down_min=L_normalOr L_min=L_normalFormula is substituted into respectivelyTry to achieve meet when rear class converter uses step-down mode the fluctuation of each pulse voltage for ΔU_iIt is required that minimum filtering capacitance C_i-Lvbo-b, or according toTry to achieve rear class change Parallel operation uses minimum filtering capacitance C during buck mode_i-Lv-b-b,；

To array [C_1-Lvbo C_2-Lvbo…C_x-1-Lvbo] take maximum and be worth to the corresponding filtering capacitance of normal work group C_normal, to arrayTake maximum and be worth to the corresponding filtered electrical of low current specific group Capacitance C_special；

Wherein, U_i-in-maxThe maximum input voltage of rear class converter, U during for i-th pulsed discharge_i-in-maxBy formula U_i-in-max=U_i-before/k_RTry to achieve, U_i-in-minThe minimum input voltage of rear class converter, U during for i-th pulsed discharge_i-in-min By formula U_i-in-min=U_i-after/k_RTry to achieve, T_sThe switch periods of rear class converter, K_LIt is inductance Safety Redundancy coefficient, Δ U_i-rippleIt is i-th magnitude of a voltage fluctuation of pulse theory discharge voltage permission, by formula Δ U_i-ripple=K_ΔU×U_iCalculate , K_ΔUIt is voltage pulsation coefficient, array [L to be allowed for pulsed discharge_1-LvboL_2-Lvbo…L_x-1-Lvbo] it is to meet normal work The minimum filter inductance array of work group continuous current mode, i.e. [L_1-Lvbo-buck L_2-Lvbo-buck…L_x-1-Lvbo] or [L_{1-Lvbo-b- b}L_2-Lvbo-b-b…L_x-1-Lvbo-b-b], arrayTo meet low current specific group inductance The continuous minimum filter inductance array of electric current, i.e.,OrArray [C_1-Lvbo C_2-Lvbo…C_x-1-Lvbo] normal to meet The minimum filter capacitor array of working group's voltage pulsation requirement, i.e. [C_1-Lvbo-b C_2-Lvbo-b…C_x-1-Lvbo-b] or [C_1-Lvbo-b-b C_2-Lvbo-b-b…C_x-1-Lvbo-b-b], arrayTo meet small electricity The minimum filter capacitor array of stream specific group voltage pulsation requirement, i.e.,Or

Further, in step (8), rear class converter uses N_{inter-parallel}The buck circuits of road crisscross parallel or N_{inter-parallel}During the buck-boost circuits of road crisscross parallel, filter inductance and filtering capacitance are asked for as follows：

It is first according to following manner and tentatively asks for filter inductance value and filter capacitor：

According to formulaRear class converter is calculated using step-down mode The minimum filter inductance L of continuous current mode is met during lower i-th pulsed discharge_i-Lvbo-buck, or according to formulaRear class converter is calculated to be put using i-th pulse under buck mode The minimum filter inductance L of continuous current mode is met when electric_i-Lvbo-b-b；

To array [L_1-Lvbo L_2-Lvbo…L_x-1-Lvbo] take maximum and be worth to the corresponding inductance value L of normal work group_normal, it is right ArrayTake maximum and be worth to the corresponding inductance value L of low current specific group_special, will Minimum inductance L during step-down mode_min=L_normalOr L_min=L_specialFormula is substituted into respectivelyTry to achieve meet when rear class converter uses step-down mode the fluctuation of each pulse voltage for ΔU_iIt is required that minimum filtering capacitance C_i-Lvbo-b, or according toTry to achieve rear class change Parallel operation uses minimum filtering capacitance C during buck mode_i-Lv-b-b；

To array [C_1-Lvbo C_2-Lvbo…C_x-1-Lvbo] take maximum and be worth to the corresponding filtering capacitance of normal work group C_normal, to arrayTake maximum and be worth to the corresponding filtered electrical of low current specific group Capacitance C_special；

Then filter inductance value and filter capacitor are corrected as follows：

The filter inductance value tried to achieve in aforesaid way is modified according to following formula；

Or

When using buck for rear class converter, by following mode amendment filter capacitor：By revised filter inductance Value L_min=L '_normalBring formula intoAgain the corresponding filter of normal work group is asked for Ripple capacitance C_normalFiltering capacitance C corresponding with low current specific group_special；

Step-down/up type is used for rear class converter, by following mode amendment filter capacitor：

Wherein, K_parallel-LThe safety coefficient of inductance, K when using crisscross parallel mode for converter_parallel-CIt is buck The redundancy coefficient of electric capacity when formula rear class converter uses crisscross parallel mode.

Beneficial effect：The present invention compared with prior art, with advantages below：

The present invention is carrying out considering certain Safety Redundancy when super capacitor group number determines, is carrying out super capacitor module When discharge scheme is designed, each discharge regime includes redundancy scheme, the mutual standby redundancy between regular picture group, low current Mutual standby redundancy between specific group, equally also adds redundancy scheme inside rear class constant-current converter, that is, use N_{inter-parallel}+ No. 1 converter parallel redundancy mechanism, further improves the reliability of demagnetization power supply, equivalent to each conversion Device circuit has redundancy, and total output circuit has redundancy again, and reliability is very high.The multiple chopper circuit of multiphase exports total current in theory Maximum pulsation rate the ratio between (pulsation amplitude with average value) is inversely proportional with the number of phases square, and ripple frequency raising, therefore, work as control The timing of output current maximum pulsation rate one, the smoothing reactor inductance value required for the multiple chopper circuit of multiphase is cut than individual unit Wave circuit is greatly reduced.The average current that every road booster circuit or step-up/step-down circuit undertake is smaller, and switching device is easily selected, and is opened Close frequency accordingly to improve, can further reduce the requirement of filtering inductance.Particularly the setting of low current specific group, not only protects The precision of card electric current in scun impulse electricity, and reduce the inductance value of filter inductance, reduced the volume of demagnetization power supply.

Brief description of the drawings

Fig. 1 is demagnetization power-supply system logic diagram of the present invention；

Fig. 2 is demagnetization power system approach figure of the present invention；

Fig. 3 is determination storage capacitor module parameter of the invention, the packet of storage capacitor working group, filter capacitor and inductance value The program flow diagrams such as calculating；

Fig. 4 is that the present invention calculates discharge principle figure during with the storage capacitor capability value of power station power supply power match；

Fig. 5 carries out electric capacity module packet schematic diagram for the present invention；

Fig. 6 is demagnetization power supply typical output current waveform of the present invention；

Fig. 7 is demand power station power supply power of the present invention and capacitance group number graph of a relation；

Fig. 8 is the 10+2 discharge schemes electric capacity module packet schematic diagram of present invention design；

Fig. 9 be present invention design 10+2 discharge schemes in " 2+3 " electric capacity module packet schematic diagram in single big group；

Figure 10 is six phase sixfold step-up/step-down circuit crisscross parallel circuit diagrams of present invention design；

The demagnetization power supply exemplary pulse current output waveform figure that Figure 11 is designed for the specific embodiment of the invention.

Specific embodiment

Technical scheme is described in further detail with reference to the accompanying drawings and examples.

The targeted high reliability energy storage demagnetization power supply of the inventive method is by rectifier 1, charge controller 2, storage capacitor Module 3, rear class constant-current converter 4, electric current reversing arrangement 5, system monitor 6 are constituted；Rectifier 1, charge controller 2, energy storage Electric capacity module 3, rear class constant-current converter 4, the sequential concatenation of electric current reversing arrangement 5, system monitor 6 is by order wire and control of charging Device processed 2, storage capacitor module 3, rear class constant-current converter 4, electric current reversing arrangement 5 communicate, and structure chart is as shown in Figure 1.Demagnetization electricity Origin system receives the alternating current energy of AC power station, through links such as over commutation, energy storage, conversion, commutations after, for load provide positive and negative Alternately, the intermittent pulse current progressively decayed.

Fig. 5 show demagnetization power supply typical output current waveform.The demagnetization power supply following to performance indications is carried out below Storage capacitor capacity and filter inductance, the design of electric capacity, technical method of the invention is illustrated with this.

Performance indications：A. output current：50-4000A continuously adjustabes；

B. output voltage：0-650VDC continuously adjustabes；

C. load resistance：≤0.1625Ω；

D. output current wave：The positive and negative alternating of pulsed, decays by equal difference or exponential law successive, overshoot：≤ 2% (pressing individual pulse)；

E. pulse width：5-10s；

F. pulse spacing：15-20s；

G. pulse number：50；

(1) the 1st pulse of energy storage demagnetization power supply to the 50th cumlative energy E of pulse is calculated_i；

The parameter used：First pulse theory discharge current I₁=4000A, electric current equal difference decay tolerance Δ I=80A, load Resistance R_L=0.1625 Ω, individual pulse discharge time T_on=10s, pulse current exponential damping coefficient k_ΔI=0.1, pulse is total Number N_pluse=50.Table 2 shown in the pulse energy data and table 2 being calculated as equal difference shown in table 1 is calculated by decay The theoretical pulse data that coefficient 0.1 is calculated.

The pulse energy data that table 1 is calculated by equal difference

The theoretical pulse data that table 2 is calculated by attenuation coefficient 0.1

(2) the monomer series-connected number of rated voltage and electric capacity of storage capacitor module is determined, concrete mode is：

Bring first pulse theory discharge voltage into formula U_1c-b-min=(U₁/d_buck-max+Δu)×k_RIt is calculated rear class change The electric capacity electric discharge minimum voltage U that first pulse is allowed when parallel operation uses step-down mode_1c-b-min=703.6V, makes storage capacitor module Rated voltage U_c-N=U_1c-b-min×K_safe-u-b=864V, according to formula N_seires=U_c-N/U_c-single×K_{c-nonuniformity}Meter Calculate the monomer series-connected number N ' s of electric capacity of storage capacitor module_eirEs=318.42, the revised monomer series-connected number of storage capacitor N_seires=320, wherein, d_buck-max=0.97, Δ u=0, k_R=1.05, K_{c-nonuniformity}=1.22, U_c-single=2.7V, K_safe-u-b=1.228.

(3) the storage capacitor capability value c ' of primary Calculation and power station power supply power match_sum。

Below from current index decay, rear class converter buck mode, power station power supply power P_gridElect 1000kW as As a example by carry out the design of next step filter inductance, electric capacity.

According to formula W_1c-offer=Q₁-W_g-on-maxCalculating storage capacitor module needs to the energy of first pulse supply W_1c-offer=17900kJ；Further according to formulaPrimary Calculation goes out and power station power supply work( Rate P_gridThe storage capacitor capability value c ' for matching_sum=60.18F；

Wherein, the storage capacitor module electric discharge minimum voltage U that first pulse is allowed_1c-min=292.5V, storage capacitor module pair The efficiency eta of load discharge_c-load=0.9, power station is through prime charge controller and rear class constant-current converter to the efficiency for loading energy supply η_c-load=0.81；

4) counted storage capacitor capability value c ' preliminary to the step (3)_sumVerification amendment is carried out, and determines energy storage electricity Molar group parallel branch number N_c-sum：

According to formula W_g-offer-max=W_g-off-max+W_g-on-maxPower station is calculated in discharge interval and pulsed discharge The ceiling capacity sum W that can be provided in period_g-offer-max=20150kJ, this energy has been above the 3rd arteries and veins under exponential damping The theoretical energy Q of punching₃, it is only necessary to the first two pulse is verified, i.e. N_check=2；

As shown in figure 4, being c ' by a capacity_sum, rated voltage be U_c-NStorage capacitor as demagnetization power supply energy storage Module, and this module is carried out calculating is gradually discharged, and to capacity c '_sumVerified and by storage capacitor cubage correction system Number K_{c-sum-correction}=0.1 is modified, and obtains revised c '_sum=72.82F；

According to formula N '_c-sum=(N_seires×c′_sum)/c_singleCalculate storage capacitor modules in parallel circuitry number initial value N′_c-sum=8, by N '_c-sumIt is multiplied by storage capacitor module Safety Redundancy COEFFICIENT K_safe-c-N=1.4 and round, just obtain and power station work( Rate P_gridThe storage capacitor modules in parallel circuitry number N of the certain Safety Redundancy of consideration of matching_c-sum=12, then obtain considering certain The storage capacitor capacity C of Safety Redundancy_sum=N_c-sum×c_single÷N_seires=112.5F.

Electric current equal difference decay rear class converter step-down mode, electric current equal difference decay rear class converter buck are calculated respectively Mode, current index decay rear class converter step-down mode, current index decay rear class converter buck four kinds of situations of mode Under demand output power and capacitance group number relation (not considering Safety Redundancy), as shown in table 3, table 4 and Fig. 7.Wherein electric capacity list Body capacity is c_single=3000F, and by first pulse power P₁With power station power supply power P_gridThe ratio between be defined as power output and compare K_P, That is K_P=P₁/P_grid。

The demand output power that the step-down mode of table 3 is calculated and capacitance group number

The demand output power that the buck mode of table 4 is calculated and capacitance group number

(5) to storage capacitor modules in parallel circuitry number N_c-sum=12 are modified and are grouped：

The way N of rear class converter is used according to demagnetization power supply_converter=12 by N_c-sumThe energy storage of group parallel branch composition Electric capacity module has altogether and is divided into 12 groups, and need not correct.Fig. 8 and Fig. 9 show 10+2 electric capacity modules packet scheme schematic diagram. 10 groups is normal work group, and 2 groups is redundancy group.Each storage capacitor working group constitutes an independent module, and each is independent Module configures independent charger, and independent rear class converter, rear class converter backward load in parallel provides discharge pulse current. 10 storage capacitor working groups are divided into two big groups, and every group has 5 storage capacitor working groups；Each big group is divided into 2 groups again, There are 2 or 3 storage capacitor working groups in each group；Remaining 2 storage capacitor working groups (" 2 " in 10+2 schemes) are constituted Low current specific group, is referred to as low current specific group A and low current specific group B.

(6) process of pulse discharge design is carried out, concrete mode is：

When pulse current is more than 2000A, 10 storage capacitor working groups all participate in electric discharge；10 storage capacitor working groups It is divided into two big groups, every group there are 5 storage capacitor working groups, and pulse current is less than 2000A, during more than 1000A, in two big groups Big group of participation electric discharge of only one of which；Each big group is divided into 2 groups again, and there are 2 or 3 storage capacitors work in each group Group, pulse current is less than 1000A, and during more than 500A, only one of which group participates in electric discharge in Liang Ge groups；Remaining 2 energy storage Electric capacity working group (" 2 " in 10+2 schemes) constitutes low current specific group, is referred to as low current specific group A and low current is special Group B, when discharge current is less than 500A, only 1 group electric capacity participates in electric discharge, this group of filter inductance of electric capacity by particular design, Both current precision is can guarantee that, the total inductance value of filter inductance is reduced again.

Scheme is grouped according to electric capacity module above, according to the theoretical pulse for above being calculated by attenuation coefficient 0.1 Current data in data form can be obtained：1. stage one：From the 1st pulse to the 7th pulse, 7 pulses altogether, by 10 storages Can the participation energy supply of electric capacity working group；2. stage two：From the 8th pulse to the 14th pulse, 7 pulses altogether, by 5 energy storage electricity Hold working group and participate in energy supply；3. stage three：From the 15th pulse to the 20th pulse, 6 pulses altogether, by 2 storage capacitors Working group participates in energy supply；4. stage four：From the 21st pulse to the 50th pulse, 30 pulses altogether, by low current specific group It is completely independent energy supply.And in preceding 3 stages, if the energy that the current electric capacity module for participating in electric discharge can discharge is more than current arteries and veins The 20th pulse energy accumulation sum is flushed to, is then discharged by complete electric capacity module, any energy is no longer provided with power station afterwards Amount, until completing all pulsed discharges.

(7) process of pulse discharge calculating is carried out；

Table 5 show voltage, each pulse before and after the single electric capacity module pulsed discharge calculated by process of pulse discharge The electric current that single channel rear class converter flows through during electric discharge.

The process of pulse discharge result of calculation of table 5

(8) the process of pulse discharge result of calculation according to the step (7) asks for filter inductance and filtering capacitance：

The front and rear voltage of each pulsed discharge is calculated according to above-mentioned discharge process, and brings formula intoIn, i-th arteries and veins when calculating rear class converter using buck mode The minimum inductance L of impulse electricity requirement_i-Lvbo-b-b, as shown in table 6, the working frequency of wherein switching tube is set to computed information F=6kHz, switch periods T_s=1/f.

The inductance value being calculated under the power station power 1000kW current index attenuation transform device buck modes of table 6

To the preceding 20 inductance value maximizings being calculated, you can obtain the corresponding inductance value of normal work group group L_normal=114.45 (μ H) 30 inductance value maximizings, you can obtain the corresponding inductance value L of low current specific group_special =16.13 (μ H), wherein taking K_L=2.In this scheme, every group of rear class converter of module is interlocked simultaneously by 6 step-up/step-down circuits Joint group is into Figure 10 show the heavy chopper circuit of 6 phase 6.5 tunnel normal works, 1 tunnel is standby as redundancy, each switch tube current 100A, the switching tube working frequency of this level currents can be higher, and the weight chopper circuit of 6 phase 6 is further reduced to filter inductance Requirement.Therefore tackle the above-mentioned inductance value tried to achieve and be modified：

L′_normal=L_normal/ 25 × 2=9.16 (μ H), L '_special=L_special=/6=1.29 (μ H).According to formulaElectric capacity of voltage regulation when asking for rear class converter using buck mode, tries to achieve Capacitance it is as shown in table 7.

Electric capacity of voltage regulation value when the power station power 1000kW current index decay rear class converters of table 7 use buck mode

When can obtain power station power 1000kW, current index decay, rear class converter and using buck mode, normal work The corresponding filtering capacitance C ' of group_normal=319498 ÷ 25 × 1.2=15336 μ F and the corresponding filtered electrical of low current specific group Capacitance C '_special=13691087 ÷ 25 × 1.2=657172 μ F, wherein step-down/up type rear class converter use crisscross parallel side The redundancy COEFFICIENT K of electric capacity during formula_parallel-C=1.2.

Figure 11 show the demagnetization power supply exemplary pulse current output waveform figure of specific embodiment of the invention design, in emulation Temporarily do not consider to carry out positive and negative checker to pulse, it can be seen that the rising edge and trailing edge of pulse meet wanting less than 1s Ask.

The advantage of scheme is good redundancy properties, and considered when super capacitor group number determines, at least 40% safety is superfluous Remaining, when the design of super capacitor module discharge scheme is carried out, each discharge regime includes redundancy scheme, between regular picture group Mutual standby redundancy, the mutual standby redundancy between low current specific group equally also adds redundancy inside rear class converter Mechanism, i.e. 5+1 roads parallel redundancy mechanism, further improve the reliability of demagnetization power supply, have equivalent to each converter circuit Redundancy, total output circuit has redundancy again, and reliability is very high.The design current of each module is 600A, real work maximum current It is 400A, the switching tube range of choice of module is very big, and working frequency can be higher, can so reduce the number of filter inductance Value, super capacitor only deposits series voltage equalization problem in addition, in the absence of parallel-current equalization problem, can reduce super capacitor equal Hardware cost in terms of weighing apparatus.

Claims (5)

1. the storage capacitor and filter inductance, electric capacity of a kind of energy storage demagnetization power supply determine method, it is characterised in that the method includes Following steps：

(1) the 1st pulse of energy storage demagnetization power supply to the cumlative energy E of i-th pulse is calculated_i, concrete mode is：

According to formula I_i=I₁×(1-k_ΔI)^i-1The theoretical discharge electric current I of i-th pulse under gauge index damped manner_i, or according to Formula I_i=I₁- (i-1) × Δ I calculates the theoretical discharge electric current I of i-th pulse under equal difference damped manner_i；

According to formula U_i=I_i×R_LCalculate the theoretical discharge voltage U of i-th pulse_i, according to formula P_i=U_i×I_iCalculate i-th The theoretical discharge power P of pulse_i, according to formula Q_i=P_i×T_onCalculate the theoretical energy Q of i-th pulse_i, according to formulaCalculate the cumlative energy E from the 1st pulse to i-th pulse_i；

Wherein, i is pulse sequence number, 1~N of span_pulse, N_pulseIt is pulse sum, I₁Headed by pulse theory discharge current, k_ΔIIt is pulse current exponential damping coefficient, Δ I is electric current equal difference decay tolerance, R_LIt is load resistance, T_onFor individual pulse discharges Time, i.e. pulse width, j are pulse sequence number, 1~i of span；

(2) the monomer series-connected number of rated voltage and electric capacity of storage capacitor module is determined, concrete mode is：

According to formula U_ic-b-min=(U_i/d_buck-max+Δu)×k_RCalculate i-th pulse when rear class converter uses step-down mode The storage capacitor module electric discharge minimum voltage U of permission_ic-b-min, or according to formula U_ic-b-b-min=[(1-d_b-b-max)×U_i÷ d_b-b-max+Δu]×k_RThe storage capacitor module that i-th pulse is allowed when rear class converter uses buck mode is calculated to discharge most Small voltage U_ic-b-b-min；

The rated voltage U of storage capacitor module is determined in such a way_c-N：According to formula U_c-N-b=U_1c-b-min×K_safe-u-bMeter Calculate the rated voltage U of storage capacitor module when rear class converter uses step-down mode_c-N-b, or according to formula U_c-N-b-b= U_1c-b-b-min×K_safe-u-b-bCalculate the rated voltage U of storage capacitor module when rear class converter uses buck mode_c-N-b-b, Or directly take rated voltage U_c-N-b-b=U_c-N-b；

According to formula N '_series=U_c-N/U_c-single×K_{c-nonuniformity}Calculate the monomer series-connected number of electric capacity of storage capacitor module N′_seriesIf, N '_seriesIt is not integer, then amendment is rounded to positive infinity direction to it, obtains revised storage capacitor Monomer series-connected number N_series；

Wherein, d_buck-maxIt is the maximum duty cycle of switching tube under step-down mode, d_b-b-maxFor switching tube is most under buck mode Big space rate, Δ u is the difference compensation of converter input and output voltage, k_RIt is that storage capacitor internal resistance and electric transmission copper arrange pressure-drop coefficient, U_1c-b-minThe storage capacitor module electric discharge minimum voltage that first pulse is allowed when using step-down mode for rear class converter, K_safe-u-bStorage capacitor module rated voltage safety coefficient, U when using step-down mode for rear class converter_1c-b-b-minFor rear class becomes The storage capacitor module electric discharge minimum voltage that first pulse is allowed when parallel operation uses buck mode, K_safe-u-b-bFor rear class is converted Storage capacitor module rated voltage safety coefficient, U when device uses buck mode_c-NIt is the rated voltage of storage capacitor module, i.e., U_c-NIt is U_c-N-bOr U_c-N-b-b, K_{c-nonuniformity}It is the monomer series-connected voltage nonuniformity coefficient of storage capacitor, U_c-singleIt is energy storage electricity Hold monomer pressure voltage；

(3) the storage capacitor capability value c ' of primary Calculation and power station power supply power match_sum, concrete mode is：

According to formula W_1c-offer=Q₁-W_g-on-maxCalculating storage capacitor module needs to the energy W of first pulse supply_1c-offer, then According to formulaPrimary Calculation goes out and power station power supply power P_gridThe energy storage electricity for matching Hold capability value c '_sum；

Wherein, U_1c-minHeaded by pulse allow storage capacitor module discharge minimum voltage, η_c-loadIt is storage capacitor module to negative The efficiency of placing electricity, Q₁Headed by pulse theory energy, W_g-on-maxFor power station during pulsed discharge it is interior to pulse supply maximum Energy, by formula W_g-on-max=P_grid×T_on×η_g-loadIt is determined that, η_g-loadIt is power station through prime charge controller and rear class constant current Efficiency of the converter to load energy supply；

(4) counted storage capacitor capability value c ' preliminary to the step (3)_sumVerification amendment is carried out, and determines storage capacitor mould Group parallel branch number N_c-sum；

(5) to storage capacitor modules in parallel circuitry number N_c-sumIt is modified and is grouped by rear class converter, concrete mode is：

The way N of rear class converter is used according to demagnetization power supply_converterBy N_c-sumGroup storage capacitor module in parallel has altogether and is divided into N_converterGroup, every group includes N_parallel=N_c-sum/N_converterIndividual single storage capacitor working group, N_parallel1 should be greater than Positive integer, and the single storage capacitor working group number of each road rear class converter configuration is consistent, if N_parallelIt is unsatisfactory for Two requirements are stated, then to storage capacitor monomer capacity c_singleAfter being modified according to the following formula, return to step (4)：c_single= c_single×k_c-single, wherein k_c-singleIt is storage capacitor monomer cubage correction coefficient；

If N_parallelMeet above-mentioned two requirement, then by N_parallelThe single storage capacitor working group of group is electric and is unified into electric capacity appearance It is c to measure_{single-module}=N_parallel×c_single/N_series, rated voltage be U_c-NStorage capacitor working group, behind will to To storage capacitor working group be grouped；

(6) process of pulse discharge design is carried out, concrete mode is：

As the theoretical discharge electric current I of i-th pulse_iMore than I₁When/2, X normal work group all participates in electric discharge；

As the theoretical discharge electric current I of i-th pulse_iMore than I₁/ 4 and be less than I₁When/2, by comprising X/2 storage capacitor working group Big group discharged；

As the theoretical discharge electric current I of i-th pulse_iMore than I₁/ 8 and be less than I₁When/4, by comprising X/4 storage capacitor working group Group discharged；

As the theoretical discharge electric current I of i-th pulse_iLess than I₁When/8, discharged by single low current specific group, now, if The ceiling capacity that can be discharged to all storage capacitor working groups of i-th pulse power supply is more than from i-th to -1 pulse of xth Pulse energy sum, then power station just no longer provide any energy to storage capacitor and load, wherein x is the confession of low current specific group 1st sequence number of pulse of electricity, i ＜ x-1；

(7) process of pulse discharge calculating is carried out, concrete mode is：

According to formulaCalculate storage capacitor work after i-th pulsed discharge The energy Q of group storage_i-after, according to formulaCalculate storage capacitor after i-th pulsed discharge The voltage U of working group_i-after, according to formula Q_i-before=Q_i-1-after+W_g-off-oneEnergy storage electricity before calculating i-th pulsed discharge Hold the energy Q of working group's storage_i-beforeIf, Q_i-beforeMore than the maximum storage energy Q of storage capacitor working group_one-max, then According to Q_i-before=Q_c-one-maxAmendment Q_i-before；

According to formulaThe voltage of storage capacitor working group before calculating i-th pulsed discharge U_i-before, for the voltage U before first pulsed discharge_1-beforeWith the 1st electric discharge of pulse x powered by low current specific group Storage capacitor working group voltage U before_x-beforeBy formula U_1-before=U_x-before=U_c-NCalculate, before this two pulsed discharge The energy of corresponding storage capacitor working group storage presses formula Q_1-before=Q_x-before=Q_c-one-maxValue, according to formula I_i-single=I_i/M_iThe electric current that single channel rear class converter flows through when calculating i-th pulsed discharge；

Wherein, Q_i-beforeIt is the energy of storage capacitor working group storage before i-th pulsed discharge, M_iIt is i-th pulsed discharge When participate in energy supply storage capacitor working group group number, M_iValue is X, X/2, X/4 or 1, W_g-off-oneIt is power station between pulsed discharge Every the energy provided to storage capacitor working group in the time, as normal group electric discharge and Q_i-c-M×η_c-load≥K_Q×Q_{i-sum-back-x-1} When or low current specific group discharge when W_g-off-one0 is taken, by formula W in the case of other_g-off-one=P_grid×T_off÷X×M_i× η_g-cCalculate, Q_i-c-MM during for i-th pulse_iThe ceiling capacity that individual storage capacitor working group can discharge, by formula Locate, Q_{i-sum-back-x-1}It is from i-th pulse To all pulse energy sums of -1 pulse of xth, i >=x-1, K_QFor storage capacitor independently discharges safety coefficient, W_g-on-offerIt is electricity Stand and the energy of pulse is supplied in pulse discharge time, likewise, in normal group electric discharge and Q_i-c-M×η_g-load≥K_Q× Q_{i-sum-back-x-1}When or low current specific group discharge when, W_g-on-offer0 is taken, W is taken in the case of other_g-on-offer=P_grid÷X×M_i ×T_on×η_g-load, Q_c-one-maxBy formula Calculate；

(8) the process of pulse discharge result of calculation according to the step (7) asks for filter inductance and filtering capacitance.

2. the storage capacitor and filter inductance, electric capacity of energy storage demagnetization power supply according to claim 1 determine method, its feature It is that the particular content of the step (4) is：

A) it is interior during the ceiling capacity that power station can be provided in discharge interval and pulsed discharge since first pulse The ceiling capacity sum W that can be provided_g-offer-max=W_g-off-max+W_g-on-maxWith the theoretical energy Q of each pulse_iCompare, until W_g-offer-maxMore than or equal to the theoretical energy Q of i-th pulse_iUntill, then obtain to c '_sumEach circulation of verification needs The pulse number N for being verified_check=i-1；

B) it is c ' by a capacity_sum, rated voltage be U_c-NStorage capacitor as demagnetization power supply energy storage module, and to this Module carries out that calculating is gradually discharged；

C) allowed more than or equal to the pulse being calculated in step (2) whether voltage after this energy storage module every time electric discharge meets Storage capacitor module electric discharge minimum voltage verified, if be unsatisfactory for, according to c '_sum=c '_sum×(1+ K_{c-sum-correction}) amendment c '_sumAfterwards, return to step b), until preceding N in epicycle verification_checkThe storage capacitor that individual pulse is allowed Module electric discharge minimum voltage be respectively less than or equal to voltage after the electric discharge of energy storage module untill, and enter step d)；

D) according to formula N '_c-sum=(N_series×c′_sum)/c_singleCalculate storage capacitor modules in parallel branch road initial value N '_c-sum, By N '_c-sumIt is multiplied by K_safe-c-NAnd round, just obtain and power station power P_gridThe storage capacitor of the certain Safety Redundancy of consideration of matching Modules in parallel finger values N_c-sum, then obtain considering the storage capacitor capacity C of certain Safety Redundancy_sum=N_c-sum×c_single÷ N_series；

Wherein, W_g-off-maxThe ceiling capacity of storage capacitor module is supplied in discharge interval for power station, by formula W_g-off-max=P_grid×T_off×η_g-cIt is determined that, T_offIt is discharge interval time, η_g-cFor power station through prime charge controller to The efficiency that storage capacitor module charges, K_{c-sum-correction}It is the storage capacitor cubage correction coefficient for needing, c_singleIt is preliminary choosing Fixed storage capacitor monomer capacity, K_safe-c-NIt is storage capacitor module number Safety Redundancy coefficient, its value is more than 1.

3. the storage capacitor and filter inductance, electric capacity of energy storage demagnetization power supply according to claim 1 determine method, its feature It is that all storage capacitor working groups in the step (5) as follows to obtaining are grouped：By N_converterIt is individual Storage capacitor working group is divided into X normal work group and Y redundancy of effort group by " X+Y " scheme, and each working group constitutes one Individual independent module, each module configures independent charger and independent rear class converter, and rear class converter is in parallel backward negative Carry and pulse current is provided, X normal work group is divided into two big groups, each big Zu YouX/2Ge storage capacitors working group, then One big group is divided into Liang Ge groups, there be X/4 storage capacitor working group in each group, Y redundancy of effort group respectively constitutes Y Individual low current specific group, wherein Y >=2, X+Y=N_converter。

4. the storage capacitor and filter inductance, electric capacity of the energy storage demagnetization power supply according to claim 1,2 or 3 determine method, Characterized in that, in the step (8), rear class converter does not use crisscross parallel circuit, and filtered electrical is asked for as follows Sense and filtering capacitance：

According to formulaRear class converter is calculated using under step-down mode i-th The minimum filter inductance L of continuous current mode is met during individual pulsed discharge_i-Lvbo-buck, or according to formulaRear class converter is calculated to be put using i-th pulse under buck mode The minimum filter inductance L of continuous current mode is met when electric_i-Lvbo-b-b；

To array [L_1-LvboL_2-Lvbo…L_x-1-Lvbo] take maximum and be worth to the corresponding inductance value L of normal work group_normal, it is right ArrayTake maximum and be worth to the corresponding inductance value L of low current specific group_special, Minimum inductance L during by the mode of step-down_min=L_normalOr L_min=L_specialFormula is substituted into respectivelyTry to achieve meet when rear class converter uses step-down mode the fluctuation of each pulse voltage for ΔU_iIt is required that minimum filtering capacitance C_i-Lvbo-b, or according toTry to achieve rear class change Parallel operation uses minimum filtering capacitance C during buck mode_i-Lv-b-b；

To array [C_{1-LvboC2-Lvbo}…C_x-1-Lvbo] take maximum and be worth to the corresponding filtering capacitance C of normal work group_normal, it is right ArrayTake maximum and be worth to the corresponding filtering capacitance of low current specific group C_special；

Wherein, U_i-in-maxThe maximum input voltage of rear class converter, U during for i-th pulsed discharge_i-in-maxBy formula U_i-in-max =U_i-before/k_RTry to achieve, U_i-in-minThe minimum input voltage of rear class converter, U during for i-th pulsed discharge_i-in-minBy formula U_i-in-min=U_i-after/k_RTry to achieve, T_sThe switch periods of rear class converter, K_LIt is inductance Safety Redundancy coefficient, Δ U_i-rippleIt is The magnitude of a voltage fluctuation that i pulse theory discharge voltage is allowed, by formula Δ U_i-ripple=K_ΔU×U_iCalculate, K_ΔUIt is pulsed discharge It is voltage pulsation coefficient to allow, array [L_1-LvboL_2-Lvbo…L_x-1-Lvbo] it is the minimum for meeting normal work group continuous current mode Filter inductance array, i.e. [L_1-Lvbo-buckL_2-Lvbo-buck…L_{x-1-Lvbo-buck}] or [L_1-Lvbo-b-bL_2-Lvbo-b-b…L_x-1-Lvbo-b-b], ArrayTo meet the minimum filter inductance number of low current specific group continuous current mode Group, i.e.,Or Array [C_1-LvboC_2-Lvbo…C_x-1-Lvbo] be the minimum filter capacitor array for meeting normal work group voltage pulsation requirement, i.e., [C_1-Lvbo-bC_2-Lvbo-b…C_x-1-Lvbo-b] or [C_1-Lvbo-b-bC_2-Lvbo-b-b…C_x-1-Lvbo-b-b], array [C_x-LvboC_x+1-Lvbo… C_Npluse-Lvbo] be the minimum filter capacitor array for meeting low current specific group voltage pulsation requirement, i.e.,Or

5. the storage capacitor and filter inductance, electric capacity of energy storage demagnetization power supply according to claim 4 determine method, its feature It is that in the step (8), rear class converter uses N_{inter-parallel}The buck circuits or N of road crisscross parallel_{inter-parallel} During the buck-boost circuits of road crisscross parallel, filter inductance and filtering capacitance are asked for as follows：

Filter inductance value and filter capacitor are tentatively asked for first；

Then filter inductance value and filter capacitor are corrected as follows：

The filter inductance value tried to achieve in aforesaid way is modified according to following formula；

Or

When using buck for rear class converter, by following mode amendment filter capacitor：By revised filter inductance value L_min =L '_normalBring formula intoAgain the corresponding filter capacitor of normal work group is asked for Value C_normalFiltering capacitance C corresponding with low current specific group_special；

Step-down/up type is used for rear class converter, by following mode amendment filter capacitor：

$C_{normal}^{\′}=C_{normal}/M_{nter-parallel}^2\×K_{parallel-C};$

$C_{special}^{\′}=C_{special}/N_{\mathrm{int}er-parallel}^2\×K_{parallel-C};$

Wherein, K_parallel-LThe safety coefficient of inductance, K when using crisscross parallel mode for converter_parallel-CAfter step-down/up type The redundancy coefficient of electric capacity when level converter uses crisscross parallel mode.