CN107576913B - Hydrogen load operation analysis method in active power distribution network - Google Patents
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- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 224
- 239000001257 hydrogen Substances 0.000 title claims abstract description 219
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 219
- 238000009826 distribution Methods 0.000 title claims abstract description 36
- 238000004458 analytical method Methods 0.000 title claims abstract description 14
- 239000000446 fuel Substances 0.000 claims abstract description 154
- 238000000034 method Methods 0.000 claims abstract description 29
- 238000003860 storage Methods 0.000 claims abstract description 19
- 238000006243 chemical reaction Methods 0.000 claims abstract description 8
- 238000004519 manufacturing process Methods 0.000 claims abstract description 4
- 230000011218 segmentation Effects 0.000 claims description 21
- 239000012528 membrane Substances 0.000 claims description 9
- 238000005868 electrolysis reaction Methods 0.000 claims description 8
- 230000004913 activation Effects 0.000 claims description 3
- 238000004364 calculation method Methods 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 230000002441 reversible effect Effects 0.000 claims description 3
- 239000007789 gas Substances 0.000 claims description 2
- 230000009286 beneficial effect Effects 0.000 description 3
- 150000002431 hydrogen Chemical class 0.000 description 2
- 238000007728 cost analysis Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention provides a hydrogen load operation analysis method in an active power distribution network, which comprises the following steps: obtaining operating parameters of an electrolytic cell for hydrogen production and a hydrogen fuel cell; calculating the power of the electrolytic cell and the power of the hydrogen fuel cell according to the acquired operation parameters; fitting the effective power and the electrolytic efficiency of the electrolytic cell to form an electrolytic cell power-efficiency curve, and fitting the effective power and the working efficiency of the hydrogen fuel cell to form a hydrogen fuel cell power-efficiency curve; the method can accurately analyze the effective power injected into the power distribution network and the hydrogen conversion process of the power distribution network, and can effectively and accurately analyze the generation amount, consumption amount and storage and transportation of the hydrogen in the hydrogen energy conversion process.
Description
Technical Field
The invention relates to an analysis method, in particular to a hydrogen load operation analysis method in an active power distribution network.
Background
The hydrogen energy is a new clean energy, the hydrogen energy is effectively utilized, the hydrogen energy has an extremely important role in the sustainable utilization of global energy and the global ecological environment, along with the development of science and technology, the hydrogen energy is gradually used in an active power distribution network, when the electric energy in the power distribution network is in the process of electrolyzing water to generate hydrogen, the electric energy is converted into chemical energy stored by the hydrogen, and when the electric energy in the power distribution network is insufficient, the electric energy generated by a hydrogen fuel cell is inferior to the electric energy in the power distribution network, so that the stable operation of the power distribution network is realized, particularly, the distributed energy is widely utilized, and the hydrogen energy is reasonably scheduled, so that the phenomena of wind abandonment and light abandonment can be relieved; however, in the prior art, the analysis of the hydrogen load in the power distribution network is mainly performed by the power injected into the power distribution network by the hydrogen fuel cell and the power injected into the electrolytic cell by the power distribution network, but how the process state of the hydrogen energy in the processes of electrolysis and power generation is, there is no effective means to perform accurate analysis at present, and further, the generation, consumption, storage and transportation of hydrogen in the process of hydrogen energy conversion cannot be accurately analyzed, so that the cost treatment of the whole power grid system is not facilitated.
Therefore, a new method is needed to be provided, on one hand, the effective power injected into the power distribution network and in the process of converting hydrogen into the power distribution network can be accurately analyzed, so that the scheduling operation of the power distribution network is facilitated, on the other hand, the generation amount, the consumption amount, the storage and transportation of hydrogen in the process of converting hydrogen energy can be effectively and accurately analyzed, and the accurate reference for reducing the operation cost of the whole power distribution network is facilitated.
Disclosure of Invention
In view of the above, the present invention provides a method for analyzing hydrogen load operation in an active power distribution network, which can accurately analyze effective power injected into the power distribution network and during a process of converting hydrogen gas by the power distribution network, and is beneficial to scheduling operation of the power distribution network, and can effectively analyze hydrogen gas generation amount, hydrogen gas consumption amount, hydrogen gas storage and transportation during a process of converting hydrogen energy, and is beneficial to making an accurate reference for reducing an operation cost of the whole power distribution network.
The invention provides a hydrogen load operation analysis method in an active power distribution network, which comprises the following steps:
s1, obtaining operation parameters of an electrolytic cell for hydrogen production and a hydrogen fuel cell;
s2, calculating the power of the electrolytic cell and the power of the hydrogen fuel cell according to the obtained operation parameters;
s3, fitting the effective power and the electrolytic efficiency of the electrolytic cell to form an electrolytic cell power-efficiency curve, and fitting the effective power of the hydrogen fuel cell and the working efficiency of the hydrogen fuel cell to form a hydrogen fuel cell power-efficiency curve;
and S4, carrying out linearization treatment on the effective power-efficiency curve of the hydrogen fuel cell and the effective power-efficiency curve of the electrolytic cell to obtain the effective power of the electrolytic cell and the hydrogen fuel cell and the amount of hydrogen in operation.
Further, in step S2, the power of the electrolytic cell and the hydrogen fuel cell is calculated according to the following method:
power of the electrolytic cell:
calculating the internal potential V of the cellez：Vez＝Vez,0+Vetd+Vez,ohm+Vion；
Wherein:
wherein, Vez,0Is the reversible potential of the cell, VetdIs the activation overpotential of the electrolytic cell, Vez,ohmIs the ohmic overpotential, V, of the cellionIs the ionic overpotential, T, of the electrolytic cellezAs the temperature of the cell, iezIs the current density of the cell, iaoIs the anodic current density of the cell, icoIs the cathode current density, delta, of the electrolytic cellBExchange of the membrane thickness, σ, for electrolytic cellsBIs the exchange membrane conductivity of the electrolytic cell; lambda is the exchange membrane constant of the electrolytic cell, R is the ideal gas constant, and F is the Faraday constant;
the power and efficiency of the cell was calculated according to the following formula:
Pez＝nezVezIez；
Pez,0＝nezVez,0Iez；
power calculation of hydrogen fuel cell:
calculating the internal potential V of the hydrogen fuel cellfc：
Vfc＝Vfc,0-Vact-Vfc,ohm-Vconc
Vfc,ohm＝0.299ifc；
Vconc＝0.028ifc 9.001；
Power of hydrogen fuel cell: pfc＝nfcVfcIfc；
Pfc,0＝nfcVfc,0Ifc；
Further, in step S4, the effective power-efficiency curve of the hydrogen fuel cell and the effective power-efficiency curve of the electrolytic cell are linearized by:
establishing a segmentation model:
βi＝f(ti)-αipi；
wherein alpha isiFor the slope, β, of the segment line of the i-th segment after the segmentation of the curveiFor the equivalent intercept, p, of the segment line of the i-th segment after the curve segmentationiFor the segmentation point of the i-th segment after the curve segmentation, p1As hydrogen fuel cells orMinimum output of electrolytic cell, pN+1The maximum output, P, of the hydrogen fuel cell or the electrolysis celli(t) is the output, δ, of the hydrogen fuel cell or electrolyser in the i-th stage of the t periodi(t) is the state of the ith stage in the period t, and delta (t) is the running state in the period t;
and carrying out piecewise linearization processing on the effective power of the electrolytic cell and the hydrogen fuel cell according to a piecewise model to obtain:
wherein, PELIs the effective power, P, obtained after the sectional treatment of the effective power curve of the electrolytic cellELiEffective power, delta, for the i-th section of the cell effective power curveELiIs the operating state of the i-th section on the effective power curve of the electrolytic cell, aiIs the slope of the i-th section of the effective power curve of the electrolytic cell, biIs the intercept of the ith section of the effective power curve of the electrolytic cell; pFCIs the effective power obtained after the segmentation processing of the effective power curve of the hydrogen fuel cell, PFCiEffective power of the i-th section of the effective power curve of the hydrogen fuel cell, deltaFCiOperating state of the i-th section of the active power curve of the hydrogen fuel cell, ciIs the slope of the i-th segment of the effective power curve of a hydrogen fuel cell, diThe intercept of the ith segment of the effective power curve of the hydrogen fuel cell; n is the number of the subsection of the curve;
further, the amount of hydrogen in operation is determined according to the following formula:
wherein:
is the amount of hydrogen produced by the electrolytic cell during electrolysis;
a mass that is hydrogen gas consumed by the hydrogen fuel cell during operation;
is the lower heating value of hydrogen; Δ t is the unit operating time of the electrolyzer and the hydrogen fuel cell.
Further, the working power of the electrolytic cell and the hydrogen fuel cell is obtained by segmenting the active power curve of the electrolytic cell and the active power curve of the hydrogen fuel cell:
wherein,
δELthe working state is obtained after the effective power curve of the electrolytic cell is processed in a segmented manner;
δFCthe working state obtained after the effective power curve of the hydrogen fuel cell is processed in a segmented mode.
Further, obtaining rated current density ranges of the electrolytic cell and the hydrogen fuel cell;
calculating the power range of the electrolytic cell according to the rated current density range of the electrolytic cell and the potential of the electrolytic cell, wherein the power value of the electrolytic cell corresponding to the lower limit of the rated current range of the electrolytic cell is the minimum output of the electrolytic cell, and the power value of the electrolytic cell corresponding to the upper limit of the rated current range of the electrolytic cell is the maximum output of the electrolytic cell;
calculating the power range of the hydrogen fuel cell according to the rated current density range of the hydrogen fuel cell and the potential of the hydrogen fuel cell, wherein the power value of the hydrogen fuel cell corresponding to the lower limit of the rated current range of the hydrogen fuel cell is the minimum output of the hydrogen fuel cell, and the power value of the hydrogen fuel cell corresponding to the upper limit of the rated current range of the hydrogen fuel cell is the maximum output of the hydrogen fuel cell;
on the active power curve of a hydrogen fuel cell or an electrolytic cell, segmenting by taking N as 2, and calculating the mean square error Q of a segmentation model function:
wherein F (P)i) Representing the function value of the original curve;
and comparing the calculated mean square deviation value with a preset mean square deviation value, if Q is greater than or equal to the preset mean square deviation value, segmenting by using N +1, calculating the mean square deviation value Q of the segmented model function, judging and comparing until Q is less than the preset mean square deviation value, and taking the number of segments which enable Q to be less than the preset mean square deviation value at present as the final segmentation number.
Further, the pressure state of the hydrogen storage device is determined according to the following formula:
wherein,
as the pressure variation amount of the hydrogen storage means,
is the temperature of the hydrogen storage means,
z is the compression factor, which is the volume of the hydrogen storage device.
The invention has the beneficial effects that: according to the invention, on one hand, the effective power injected into the power distribution network and in the process of converting hydrogen by the power distribution network can be accurately analyzed, so that the scheduling operation of the power distribution network is facilitated, on the other hand, the generation amount, the consumption amount, the storage and transportation of hydrogen in the process of converting hydrogen energy can be effectively and accurately analyzed, and the accurate reference for reducing the operation cost of the whole power distribution network is facilitated.
Drawings
The invention is further described below with reference to the following figures and examples:
FIG. 1 is a flow chart of the present invention.
FIG. 2 is a graph of the efficiency versus power of the cell of the present invention.
Fig. 3 is a graph of efficiency versus power for a hydrogen fuel cell of the present invention.
FIG. 4 is a graph of the efficiency versus the effective power of the sectioned electrolytic cell of the present invention.
Fig. 5 is a graph of efficiency versus effective power for a segmented hydrogen fuel cell of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
the invention provides a hydrogen load operation analysis method in an active power distribution network, which comprises the following steps:
s1, obtaining operation parameters of an electrolytic cell for hydrogen production and a hydrogen fuel cell;
s2, calculating the power of the electrolytic cell and the power of the hydrogen fuel cell according to the obtained operation parameters;
s3, fitting the effective power and the electrolytic efficiency of the electrolytic cell to form an electrolytic cell power-efficiency curve, and fitting the effective power of the hydrogen fuel cell and the working efficiency of the hydrogen fuel cell to form a hydrogen fuel cell power-efficiency curve; the power-efficiency curve of the electrolytic cell and the power-efficiency curve of the hydrogen fuel cell are respectively fitted by the existing method, as shown in fig. 2 and fig. 3 in the present embodiment, where the expression in fig. 2 is:
ηez＝0.0073Pez 3-0.1077Pez 2+0.5056Pez-0.2230；
the expression in fig. 3 is:
ηfc＝0.0012Pfc 3-0.0224Pfc 2+0.1111Pfc+0.2710
and S4, carrying out linearization treatment on the effective power-efficiency curve of the hydrogen fuel cell and the effective power-efficiency curve of the electrolytic cell to obtain the effective powers of the electrolytic cell and the hydrogen fuel cell and the quantity of hydrogen in operation.
In this embodiment, in step S2, the power of the electrolytic cell and the hydrogen fuel cell is calculated according to the following method:
power of the electrolytic cell:
calculating the internal potential V of the cellez：Vez＝Vez,0+Vetd+Vez,ohm+Vion；
Wherein:
wherein, Vez,0Is the reversible potential of the cell, VetdIs the activation overpotential of the electrolytic cell, Vez,ohmIs the ohmic overpotential, V, of the cellionIs the ionic overpotential, T, of the electrolytic cellezAs the temperature of the cell, iezIs the current density of the cell, iaoIs the anodic current density of the cell, icoIs the cathode current density, delta, of the electrolytic cellBExchange of the membrane thickness, σ, for electrolytic cellsBIs the exchange membrane conductivity of the electrolytic cell; lambda is the constant of the exchange membrane of the electrolytic cell, R is the ideal gasBulk constant, F is Faraday constant;
the power and efficiency of the cell was calculated according to the following formula:
Pez＝nezVezIez；
Pez,0＝nezVez,0Iez；
power calculation of hydrogen fuel cell:
calculating the internal potential V of the hydrogen fuel cellfc：
Vfc＝Vfc,0-Vact-Vfc,ohm-Vconc
Vfc,ohm＝0.299ifc；
Vconc＝0.028ifc 9.001；
Power of hydrogen fuel cell: pfc＝nfcVfcIfc；
Pfc,0＝nfcVfc,0Ifc；
In this embodiment, in step S4, the effective power-efficiency curve of the hydrogen fuel cell and the effective power-efficiency curve of the electrolytic cell are linearized by the following method:
establishing a segmentation model:
βi＝f(ti)-αipi；
wherein alpha isiFor the slope, β, of the segment line of the i-th segment after the segmentation of the curveiFor the equivalent intercept, p, of the segment line of the i-th segment after the curve segmentationiFor the segmentation point of the i-th segment after the curve segmentation, p1Minimum output, p, of hydrogen fuel cell or electrolyserN+1The maximum output, P, of the hydrogen fuel cell or the electrolysis celli(t) is the output, δ, of the hydrogen fuel cell or electrolyser in the i-th stage of the t periodi(t) is the state of the ith stage in the period t, and delta (t) is the running state in the period t;
and carrying out piecewise linearization processing on the effective power of the electrolytic cell and the hydrogen fuel cell according to a piecewise model to obtain:
wherein, PELIs the effective power, P, obtained after the sectional treatment of the effective power curve of the electrolytic cellELiEffective power, delta, for the i-th section of the cell effective power curveELiIs the operating state of the i-th section on the effective power curve of the electrolytic cell, aiIs the slope of the i-th section of the effective power curve of the electrolytic cell, biIs the intercept of the ith section of the effective power curve of the electrolytic cell; pFCIs the effective power obtained after the segmentation processing of the effective power curve of the hydrogen fuel cell, PFCiEffective power of the i-th section of the effective power curve of the hydrogen fuel cell, deltaFCiOperating state of the i-th section of the active power curve of the hydrogen fuel cell, ciIs the slope of the i-th segment of the effective power curve of a hydrogen fuel cell, diThe intercept of the ith segment of the effective power curve of the hydrogen fuel cell; n is the number of segments of the curve, the segmented curves of the electrolyzer and the hydrogen fuel cell are shown in fig. 4 and 5, and the slope and intercept of each curve can be obtained after analysis by the existing software:
the amount of hydrogen in operation is determined according to the following equation:
wherein:
is the amount of hydrogen produced by the electrolytic cell during electrolysis;
a mass that is hydrogen gas consumed by the hydrogen fuel cell during operation;
is the lower heating value of hydrogen; Δ t is the unit operating time of the electrolyzer and the hydrogen fuel cell.
The active power curve of the electrolytic cell and the active power curve of the hydrogen fuel cell are segmented to obtain the working power of the electrolytic cell and the hydrogen fuel cell:
wherein,
δELthe working state is obtained after the effective power curve of the electrolytic cell is processed in a segmented manner;
δFCthe working state obtained after the effective power curve of the hydrogen fuel cell is processed in a segmented mode. By the method, the effective power of the electrolytic cell and the hydrogen fuel cell can be accurately obtained, and the analysis of the whole power distribution network, the control of the operation cost of the power distribution network and the analysis of the hydrogen energy conversion process are facilitated.
In the embodiment, the rated current density ranges of the electrolytic cell and the hydrogen fuel cell are obtained;
calculating the power range of the electrolytic cell according to the rated current density range of the electrolytic cell and the potential of the electrolytic cell, wherein the power value of the electrolytic cell corresponding to the lower limit of the rated current range of the electrolytic cell is the minimum output of the electrolytic cell, and the power value of the electrolytic cell corresponding to the upper limit of the rated current range of the electrolytic cell is the maximum output of the electrolytic cell;
calculating the power range of the hydrogen fuel cell according to the rated current density range of the hydrogen fuel cell and the potential of the hydrogen fuel cell, wherein the power value of the hydrogen fuel cell corresponding to the lower limit of the rated current range of the hydrogen fuel cell is the minimum output of the hydrogen fuel cell, and the power value of the hydrogen fuel cell corresponding to the upper limit of the rated current range of the hydrogen fuel cell is the maximum output of the hydrogen fuel cell;
on the active power curve of a hydrogen fuel cell or an electrolytic cell, segmenting by taking N as 2, and calculating the mean square error Q of a segmentation model function:
wherein F (P)i) Representing the function value of the original curve;
and comparing the calculated mean square deviation value with a preset mean square deviation value, if Q is greater than or equal to the preset mean square deviation value, segmenting by using N +1, calculating the mean square deviation value Q of the segmented model function, judging and comparing until Q is less than the preset mean square deviation value, and taking the number of segments which enable Q to be less than the preset mean square deviation value at present as the final segmentation number.
Further, the pressure state of the hydrogen storage device is determined according to the following formula:
wherein,
as the pressure variation amount of the hydrogen storage means,
is the temperature of the hydrogen storage means,
z is the compression factor, which is the volume of the hydrogen storage device.
By the method, the hydrogen quantity in the electrolysis and hydrogen fuel cell reaction process can be accurately obtained, the operation scheduling of the whole power distribution network is facilitated, the storage and transportation of the hydrogen can be accurately guided through the relation between the pressure state of the hydrogen storage device and the hydrogen quantity, and the control of the operation cost is facilitated.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (3)
1. A hydrogen load operation analysis method in an active power distribution network is characterized by comprising the following steps: the method comprises the following steps:
s1, obtaining operation parameters of an electrolytic cell for hydrogen production and a hydrogen fuel cell;
s2, calculating the power of the electrolytic cell and the power of the hydrogen fuel cell according to the obtained operation parameters;
s3, fitting the effective power and the electrolytic efficiency of the electrolytic cell to form an electrolytic cell power-efficiency curve, and fitting the effective power of the hydrogen fuel cell and the working efficiency of the hydrogen fuel cell to form a hydrogen fuel cell power-efficiency curve;
s4, carrying out linearization treatment on the effective power-efficiency curve of the hydrogen fuel cell and the effective power-efficiency curve of the electrolytic cell to obtain the effective power of the electrolytic cell and the hydrogen fuel cell and the amount of hydrogen in operation;
in step S2, the power of the electrolytic cell and the hydrogen fuel cell is calculated according to the following method:
power of the electrolytic cell:
calculating the internal potential V of the cellez：Vez＝Vez,0+Vetd+Vez,ohm+Vion；
Wherein:
wherein, Vez,0Is the reversible potential of the cell, VetdIs the activation overpotential of the electrolytic cell, Vez,ohmIs the ohmic overpotential, V, of the cellionIs the ionic overpotential, T, of the electrolytic cellezAs the temperature of the cell, iezIs the current density of the cell, iaoIs the anodic current density of the cell, icoIs the cathode current density, delta, of the electrolytic cellBExchange of the membrane thickness, σ, for electrolytic cellsBIs the exchange membrane conductivity of the electrolytic cell; lambda is the exchange membrane constant of the electrolytic cell, R is the ideal gas constant, and F is the Faraday constant;
the power and efficiency of the cell was calculated according to the following formula:
Pez＝nezVezIez；
Pez,0＝nezVez,0Iez；
power calculation of hydrogen fuel cell:
calculating the internal potential V of the hydrogen fuel cellfc：
Vfc＝Vfc,0-Vact-Vfc,ohm-Vconc
Vfc,ohm＝0.299ifc；
Vconc＝0.028ifc 9.001；
Power of hydrogen fuel cell: pfc＝nfcVfcIfc；
Pfc,0＝nfcVfc,0Ifc；
in step S4, the effective power-efficiency curve of the hydrogen fuel cell and the effective power-efficiency curve of the electrolytic cell are linearized by the following method:
establishing a segmentation model:
βi＝f(ti)-αipi；
wherein alpha isiFor the slope, β, of the segment line of the i-th segment after the segmentation of the curveiFor the equivalent intercept, p, of the segment line of the i-th segment after the curve segmentationiFor the segmentation point of the i-th segment after the curve segmentation, p1Minimum output, p, of hydrogen fuel cell or electrolyserN+1The maximum output, P, of the hydrogen fuel cell or the electrolysis celli(t) is the output, δ, of the hydrogen fuel cell or electrolyser in the i-th stage of the t periodi(t) is the state of the ith stage in the period t, and delta (t) is the running state in the period t;
and carrying out piecewise linearization processing on the effective power of the electrolytic cell and the hydrogen fuel cell according to a piecewise model to obtain:
wherein, PELIs the effective power, P, obtained after the sectional treatment of the effective power curve of the electrolytic cellELiEffective power, delta, for the i-th section of the cell effective power curveELiIs the operating state of the i-th section of the effective power curve of the electrolytic cell, alphaiIs the slope of the i-th section of the effective power curve of the electrolytic cell, biIs the intercept of the ith section of the effective power curve of the electrolytic cell; pFCIs the effective power obtained after the segmentation processing of the effective power curve of the hydrogen fuel cell, PFCiEffective power of the i-th section of the effective power curve of the hydrogen fuel cell, deltaFCiOperating state of the i-th section of the active power curve of the hydrogen fuel cell, ciIs the slope of the i-th segment of the effective power curve of a hydrogen fuel cell, diThe intercept of the ith segment of the effective power curve of the hydrogen fuel cell; n is the number of the subsection of the curve;
the amount of hydrogen in operation is determined according to the following equation:
wherein:
is the amount of hydrogen produced by the electrolytic cell during electrolysis;
a mass that is hydrogen gas consumed by the hydrogen fuel cell during operation;
is the lower heating value of hydrogen; Δ t is the unit operating time of the electrolyzer and the hydrogen fuel cell;
the working power of the electrolytic cell and the hydrogen fuel cell is obtained by segmenting the active power curve of the electrolytic cell and the active power curve of the hydrogen fuel cell:
wherein,
δELthe working state is obtained after the effective power curve of the electrolytic cell is processed in a segmented manner;
δFCthe working state obtained after the effective power curve of the hydrogen fuel cell is processed in a segmented mode.
2. The method for analyzing the hydrogen load operation in the active power distribution network according to claim 1, wherein:
obtaining rated current density ranges of an electrolytic cell and a hydrogen fuel cell;
calculating the power range of the electrolytic cell according to the rated current density range of the electrolytic cell and the potential of the electrolytic cell, wherein the power value of the electrolytic cell corresponding to the lower limit of the rated current range of the electrolytic cell is the minimum output of the electrolytic cell, and the power value of the electrolytic cell corresponding to the upper limit of the rated current range of the electrolytic cell is the maximum output of the electrolytic cell;
calculating the power range of the hydrogen fuel cell according to the rated current density range of the hydrogen fuel cell and the potential of the hydrogen fuel cell, wherein the power value of the hydrogen fuel cell corresponding to the lower limit of the rated current range of the hydrogen fuel cell is the minimum output of the hydrogen fuel cell, and the power value of the hydrogen fuel cell corresponding to the upper limit of the rated current range of the hydrogen fuel cell is the maximum output of the hydrogen fuel cell;
on the active power curve of a hydrogen fuel cell or an electrolytic cell, segmenting by taking N as 2, and calculating the mean square error Q of a segmentation model function:
wherein F (P)i) Representing the function value of the original curve;
comparing the calculated mean square deviation value with a preset mean square deviation value, if Q is larger than or equal to the preset mean square deviation value, segmenting by N +1, calculating the mean square deviation value Q of a segmentation model function, judging and comparing until Q is smaller than the preset mean square deviation value, and taking the number of segments which enable Q to be smaller than the preset mean square deviation value as the final number of segments;
3. the method for analyzing the hydrogen load operation in the active power distribution network according to claim 1, wherein: the pressure state of the hydrogen storage device is determined according to the following formula:
wherein,
is the pressure of the hydrogen storage device,
is the temperature of the hydrogen storage means,
z is the compression factor, which is the volume of the hydrogen storage device.
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