Operation control method for electric-hydrogen coupling system, and electric-hydrogen coupling system

Abstract

The present disclosure relates to the technical field of new energy power generation, and provides an operation control method for an electric-hydrogen coupling system, and an electric-hydrogen coupling system. According to the present disclosure, prediction related parameters corresponding to power station power and power station power instruction related parameters are acquired, and in order to achieve optimal economic efficiency while meeting grid power exchange limitation requirements, a power station power adjustment instruction and an electrolytic cell power adjustment instruction corresponding to each moment are acquired.

Description

Operation control method of an electricity-hydrogen coupling system and electricity-hydrogen coupling system

[0001] Cross-reference to Related Applications

[0002] The present disclosure is based on and claims priority from Chinese Patent Application No. 202410439464.6 filed on April 12, 2024, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0003] The present disclosure relates to the field of new energy power generation technology, and in particular to an operation control method of an electricity-hydrogen coupling system and the electricity-hydrogen coupling system. BACKGROUND

[0004] Currently, with the rapid development of new energy, the power system is facing unprecedented challenges. The large-scale access of new energy to the power grid has brought great pressure, not only requiring effective regulation of supply and demand balance, but also ensuring the safe and stable operation of the power grid. In order to realize the orderly and benign development of new energy, various places have introduced supporting policies and management measures.

[0005] In some areas, the requirements for new energy development projects are becoming increasingly stringent. For example, a certain place requires that newly developed energy must be matched with a certain scale of hydrogen production system to achieve self-generation and self-use, and cannot transmit excess electricity to the power grid. Specifically, only 20% of the electricity is allowed to be connected to the grid, and the rest needs to be used for hydrogen production or self-use. Similarly, some independently developed photovoltaic power stations are also required to achieve complete self-generation and self-use, and cannot be connected to the grid. These restrictive requirements aim to guide new energy projects towards a more sustainable and green direction, while also alleviating the pressure on the power grid.

[0006] However, there are currently restrictions on the electricity transmission and withdrawal of electricity-hydrogen coupling systems, but there is a lack of effective operation management strategies. From the perspective of matching and coupling between electricity and hydrogen, there is currently no unified dynamic management system, and the characteristics of new energy and hydrogen production systems cannot be fully utilized. Therefore, research and innovation on the operation management strategy of electricity-hydrogen coupling systems is imperative. SUMMARY

[0007] The present disclosure provides an operation control method of an electricity-hydrogen coupling system and the electricity-hydrogen coupling system to at least solve the problem that from the perspective of matching and coupling between electricity and hydrogen, there is currently no unified dynamic management system.

[0008] A first aspect embodiment of the present disclosure provides an operation control method of an electricity-hydrogen coupling system, comprising:

[0009] S1, obtain predicted related parameters corresponding to power station power and power station power instruction related parameters, the predicted related parameters including a prediction period T1 and a rolling period T2, the power station power instruction related parameters including a power station power instruction transmission delay T3, wherein T1>T3;

[0010] S2, according to the power station power measured value corresponding to the time t, the electrolytic cell power measured value corresponding to the time t and the power station power prediction value sequence in the t~t+T1 time period, obtain the first electrolytic cell power set value sequence in the t~t+T1 time period and the power station power set value sequence in the t~t+T1 time period for the purpose of economic optimization and meeting the power grid power exchange restriction demand at the same time;

[0011] S3, in the t~t+T3 time period, according to the power station power set value sequence, the power station power adjustment instruction is issued, and the power station power measured value sequence in the t~t+T3 time period is obtained;

[0012] S4, based on the power station power measured value sequence in the t~t+T3 time period, the first electrolytic cell power set value sequence in the t~t+T1 time period and the power station power set value sequence in the t~t+T1 time period, the second electrolytic cell power set value sequence in the t~t+T3 time period is determined;

[0013] S5, based on the power station power measured value sequence in the t~t+T3 time period, the second electrolytic cell power set value sequence in the t~t+T3 time period and the first electrolytic cell power set value sequence in the t~t+T1 time period, the electrolytic cell power adjustment instruction sequence in the t~t+T3 time period is determined, and in the t~t+T3 time period, the electrolytic cell power adjustment instruction is issued according to the electrolytic cell power adjustment instruction sequence;

[0014] S6, obtain the electrolytic cell power measured value sequence in the t~t+T3 time period;

[0015] S7, at the time t+T3, the first electrolytic cell power set value sequence in the t~t+T1 time period and the power station power set value sequence in the t~t+T1 time period are updated according to the power station power measured value sequence in the t~t+T3 time period and the electrolytic cell power measured value sequence in the t~t+T3 time period;

[0016] S8, taking the time t+T3 as a new t, repeating the above S3~S7, until the time t+T2, updating the t, repeating the above S2~S7, to obtain the power station power adjustment instruction and the electrolytic cell power adjustment instruction corresponding to each time.

[0017] According to one embodiment of the present disclosure, the prediction-related parameters further include prediction accuracy and prediction value resolution; the power plant power instruction-related parameters further include a power plant power instruction transmission period, and the electrolytic cell power adjustment instruction issuing period is not greater than the power plant power instruction transmission period.

[0018] According to one embodiment of the present disclosure, in S2, the revenue function corresponding to the purpose of economic optimization is: W = Max(R H2 + R V - C H2 - C b - C dH2 )

[0019] In the above formula, W is the total revenue, R H2 is the hydrogen production income of the electrolytic hydrogen production unit, R V is the power generation income when the electrolytic hydrogen coupling system is allowed to feed into the grid or the grid feeding penalty cost when the electrolytic hydrogen coupling system is not allowed to feed into the grid, C H2 is the operation and maintenance cost of the electrolytic hydrogen production unit, C b is the grid withdrawal cost when the electrolytic hydrogen coupling system is allowed to withdraw from the grid or the grid withdrawal penalty cost when the electrolytic hydrogen coupling system is not allowed to withdraw from the grid, C dH2 is the power adjustment cost of the electrolytic hydrogen production unit, which is related to the power adjustment amplitude.

[0020] According to one embodiment of the present disclosure, the calculation formula of each parameter involved in the revenue function includes: η dH2 =[η dH2,1 ,…,η dH2,n1 ]

[0021] In the above formula, is the power plant power setting value sequence in the t-t+T1 time period; is the first electrolytic cell power setting value sequence in the t-t+T1 time period;

[0022] In the above formula, η H2 is the hydrogen-to-electricity conversion efficiency of the electrolytic hydrogen production unit; is the hydrogen price in the t-t+T1 time period, which is determined by market dynamics; T res,1 is the prediction value resolution;

[0023] In the above formula, η E is the power transmission efficiency of the power plant to the grid, which is related to factors such as line loss; is the grid feeding price or penalty cost in the t-t+T1 time period, the grid feeding price is determined by market dynamics, and the penalty cost is determined by the penalty action caused by grid feeding;

[0024] In the above formula, η C,H2 is the variable cost of electrolytic hydrogen production; is the fixed cost per unit of time of electrolytic hydrogen production, which is related to the depreciation rate; is the rated power of the electrolytic hydrogen production unit;

[0025] In the above formula, is the lower grid electricity price or penalty cost in the t-t+T1 time period, the lower grid electricity price is determined by market dynamics, and the penalty cost is determined by the penalty action caused by the lower grid;

[0026] In the above formula, η dH2 is the cost of each adjustment of electrolytic hydrogen production in the t-t+T1 time period, which is related to the power change of each adjustment.

[0027] According to one embodiment of the present disclosure, in S2, in order to achieve the first electrolytic tank power setting value sequence in the t-t+T1 time period and the power station power setting value sequence in the t-t+T1 time period, the following restriction conditions need to be met:

[0028] Each first electrolytic tank power setting value in the first electrolytic tank power setting value sequence is located in the preset power range interval;

[0029] The power adjustment speed corresponding to each first electrolytic tank power setting value in the first electrolytic tank power setting value sequence is less than or equal to the maximum adjustment speed;

[0030] When the power station is not allowed to feed into the grid, the lower grid power and the lower grid electricity meet the lower grid limit, or when the lower grid is not allowed, the upper grid power and the upper grid electricity meet the lower grid limit;

[0031] The prediction accuracy of each power station power setting value in the power station power setting value sequence meets the accuracy error range.

[0032] According to one embodiment of the present disclosure, each value in the power station power setting value sequence in the t-t+T1 time period is less than or equal to the corresponding value in the power station power prediction value sequence in the t-t+T1 time period.

[0033] According to one embodiment of the present disclosure, based on the power station power measured value sequence in the t-t+T3 time period, the second electrolytic tank power setting value sequence in the t-t+T3 time period, and the first electrolytic tank power setting value sequence in the t-t+T1 time period, the electrolytic tank power adjustment instruction sequence in the t-t+T3 time period is determined, including:

[0034] Based on the second electrolytic tank power setting value sequence in the t-t+T3 time period and the first electrolytic tank power setting value sequence in the t-t+T1 time period, each electrolytic tank power adjustment instruction in the first electrolytic tank power adjustment instruction sub-sequence is determined.

[0035] determine each electrolysis cell power adjustment instruction in the first electrolysis cell power adjustment instruction sub-sequence based on each electrolysis cell power adjustment instruction in the first electrolysis cell power adjustment instruction sub-sequence, the power measured value sequence in the t-t+T3 time period, and the first electrolysis cell power set value sequence in the t-t+T1 time period;

[0036] determine the electrolysis cell power adjustment instruction sub-sequence in the t-t+T3 time period based on the first electrolysis cell power adjustment instruction sub-sequence and the second electrolysis cell power adjustment instruction sub-sequence.

[0037] According to one embodiment of the present disclosure, determining each electrolysis cell power adjustment instruction in the first electrolysis cell power adjustment instruction sub-sequence based on the second electrolysis cell power set value sequence in the t-t+T3 time period and the first electrolysis cell power set value sequence in the t-t+T1 time period comprises:

[0038] obtain a plurality of first time instants corresponding to the first electrolysis cell power set value sequence in the t-t+T1 time period;

[0039] obtain a plurality of second time instants corresponding to the second electrolysis cell power set value sequence in the t-t+T3 time period;

[0040] for each second time instant, if there is no first time instant that coincides in time with the second time instant, taking the second electrolysis cell power set value corresponding to the second time instant as the electrolysis cell target adjustment power corresponding to the second time instant;

[0041] for each second time instant, if there is a first time instant that coincides in time with the second time instant, taking the average of the first electrolysis cell power set value and the second electrolysis cell power set value corresponding to the time coinciding instant as the electrolysis cell target adjustment power corresponding to the time coinciding instant;

[0042] based on the first electrolysis cell power set value sequence in the t-t+T1 time period, the prediction value resolution, and the power station power instruction transmission period, calculate the electrolysis cell target power adjustment speed corresponding to each second time instant;

[0043] generate each electrolysis cell power adjustment instruction in the first electrolysis cell power adjustment instruction sub-sequence according to the electrolysis cell target adjustment power corresponding to each second time instant and the electrolysis cell target power adjustment speed.

[0044] The second aspect embodiment of the present disclosure proposes an electricity-hydrogen coupling system, comprising: an energy management module, a new energy power generation module, and an electrolytic hydrogen production module, wherein:

[0045] The energy management module comprises an electricity-hydrogen coupling control unit, a power station power prediction unit, a power station control unit, and an electrolytic hydrogen production control unit;

[0046] The electric-hydrogen coupling control unit is configured to generate a power adjustment instruction of the power station and a power adjustment instruction of the electrolysis cell;

[0047] The power station power prediction unit is configured to implement power station power prediction in a prediction period;

[0048] The power station control unit is configured to receive the power adjustment instruction of the power station sent by the electric-hydrogen coupling control unit and implement control of the power station power and real-time transmission of the power;

[0049] The electrolysis hydrogen production unit is configured to receive the power adjustment instruction of the electrolysis cell sent by the electric-hydrogen coupling control unit and implement control of the power of the electrolysis hydrogen production unit.

[0050] The third aspect of the present disclosure provides an electronic device, comprising: at least one processor; and a memory connected with the at least one processor in communication; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to implement the operation control method of the electric-hydrogen coupling system according to the first aspect of the present disclosure.

[0051] The fourth aspect of the present disclosure provides a non-transitory computer-readable storage medium storing computer instructions, wherein the computer instructions are used to implement the operation control method of the electric-hydrogen coupling system according to the first aspect of the present disclosure.

[0052] The fifth aspect of the present disclosure provides a computer program product, comprising a computer program, wherein the computer program is used to implement the operation control method of the electric-hydrogen coupling system according to the first aspect of the present disclosure when executed by a processor.

[0053] The embodiments of the present disclosure provide at least the following beneficial effects: the embodiments of the present disclosure realize real-time matching of the dynamic adjustment characteristics of the system by controlling the operation of the new energy module and the hydrogen production module in the system, so as to meet different power exchange limit requirements of the power grid and realize high economic efficiency.

[0054] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0055] The above and / or additional aspects and advantages of the present disclosure will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:

[0056] FIG. 1 is a schematic diagram of an exemplary embodiment of an operation control method of an electric-hydrogen coupling system according to an embodiment of the present disclosure.

[0057] FIG. 2 is a schematic diagram of an electric-hydrogen coupling system according to an embodiment of the present disclosure.

[0058] FIG. 3 is a schematic diagram of an electronic device according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0059] Embodiments of the present disclosure are described in detail below with reference to the accompanying drawings, in which like or similar elements are denoted by the same or similar reference signs, and the embodiments described below are examples for explaining the present disclosure and are not intended to be limiting of the present disclosure.

[0060] FIG. 1 is a schematic diagram of an exemplary embodiment of a method for operating a power-to-hydrogen coupling system according to the present disclosure, which includes the following steps:

[0061] S1, obtaining predicted parameters corresponding to power station power and power station power instruction related parameters, the predicted parameters including a prediction period T1 and a rolling period T2, and the power station power instruction related parameters including a power station power instruction transmission delay T3, wherein T1>T3.

[0062] The predicted parameters corresponding to the power station power include the prediction period T1 and the rolling period T2, and in addition, the predicted parameters further include a prediction accuracy A and a prediction value resolution T res，1 In the present disclosure, the prediction accuracy of the power station power is required to be no less than A. Exemplarily, A=85-95%, T1=4h, T2=5min, T res，1 =1s.

[0063] The power station power instruction related parameters corresponding to the power station power include a power station power instruction transmission delay T3, that is, the implementation of the power station power adjustment instruction has a delay of T3; in addition, the power station power instruction related parameters further include a power station power instruction transmission period T res，2 , and the characteristic is that T res，2 is no greater than T res，1 . Exemplarily, T3=1-10s, T res，2 =1s.

[0064] In the present disclosure, the instruction issuance period of the electrolytic cell power adjustment instruction needs to satisfy T res，2 . That is, the electrolytic hydrogen production control unit can act at the same frequency as the real-time transmission of the power signal of the power station.

[0065] S2, according to the power measured value of the power station corresponding to the time t, the power measured value of the electrolytic cell corresponding to the time t and the power station power prediction value sequence in the time period of t~t+T1, the first electrolytic cell power setting value sequence in the time period of t~t+T1 and the power station power setting value sequence in the time period of t~t+T1 are obtained for the purpose of economic optimization and meeting the demand of power grid power interaction restriction at the same time.

[0066] The power measured value P of the power station corresponding to the time t is obtained. V，t .

[0067] The power measured value P of the electrolytic cell corresponding to the time t is obtained. H2,t .

[0068] The power station power prediction value sequence in the time period of t~t+T1 is obtained, wherein the number n1 of power station power prediction values in the power station power prediction value sequence in the time period of t~t+T1 is n1=T1 / T. res，1 .

[0069] The power station power sequence at the time t is: Wherein The power measured value P of the power station at the time t is: The prediction value is.

[0070] Based on the power measured value of the power station corresponding to the time t, the power measured value of the electrolytic cell corresponding to the time t and the power station power prediction value sequence in the time period of t~t+T1, the first electrolytic cell power setting value sequence in the time period of t~t+T1 is obtained for the purpose of economic optimization and meeting the demand of power grid power interaction restriction at the same time. And the power station power setting value sequence in the time period of t~t+T1

[0071] In the present disclosure, according to the principle of system economic optimization in the time period of t~t+T1, the electrolytic cell power and the power station power are determined while meeting the limitation requirements of electrolytic cell power adjustment. That is, the following problems are solved:

[0072] The corresponding revenue function for the purpose of economic optimization is: W=Max(R H2 +R V -C H2 -C b -C dH2 )

[0073] In the above formula, W is the total revenue, R H2 is the hydrogen production income of the electrolytic hydrogen production unit, R V is the power generation income when the electric hydrogen coupling system is allowed to go online or the online penalty cost when it is not allowed to go online, C H2 is the operation and maintenance cost of the electrolytic hydrogen production unit, and C bC dH2 is the power regulation cost of the electrolytic hydrogen production unit, which is related to the power regulation amplitude.

[0074] The above optimization problem is to maximize the above formula.

[0075] In this disclosure, the calculation formula of each parameter involved in the benefit function includes: η dH2 = [η dH2,1 ,…,η dH2,n1 ]

[0076] In the above formula, is the power set value sequence of the power station in the time period t~t+T1; is the first electrolytic cell power set value sequence in the time period t~t+T1.

[0077] In the above formula, η H2 is the hydrogen-electric conversion efficiency of the electrolytic hydrogen production unit, generally η H2 = 0.2 Nm3 / kWh; is the hydrogen price in the time period t~t+T1, which is determined by market dynamics, generally 1.5-5 yuan / Nm3; T res,1 is the prediction resolution.

[0078] In the above formula, η E is the efficiency of the power station transmitting power to the power grid, which is related to factors such as line loss, generally 95-99%; is the on-grid price or penalty cost in the time period t~t+T1, the on-grid price is determined by market dynamics, generally 0.2-0.6 yuan / kWh; the penalty cost is determined by the penalty action caused by on-grid, such as the shutdown cost caused by the penalty or anti-flow device.

[0079] In the above formula, η C,H2 is the variable cost of electrolytic hydrogen production, generally 0.01-0.02 yuan / kWh; is the fixed cost per unit of time of electrolytic hydrogen production, which is related to the depreciation rate, generally 4% / year; is the rated power of the electrolytic hydrogen production unit.

[0080] In the above formula, is the off-grid price or penalty cost in the time period t~t+T1, the off-grid price is determined by market dynamics, generally 0.3-1.0 yuan / kWh; the penalty cost is determined by the penalty action caused by off-grid, such as the shutdown cost caused by the penalty or anti-flow device.

[0081] In the above formula, η dH2is the cost of electrolytic hydrogen production in the time period t~t+T1 for each adjustment, which is related to the power change of each adjustment. Specifically: η dH2 =c1×△w+c2×△Lv+c3×△Q+c4×△Q W +c5×△v

[0082] wherein η dH2 is the cost of each adjustment, c1 is a coefficient considering gas post-processing and gas mixing safety risk, △w is the change of gas purity; c2 is a coefficient considering the safety risk of increased liquid level difference, △Lv is the change of liquid level difference; c3 is the lye flow adjustment cost coefficient, △Q is the change of lye flow; c4 is the cooling medium flow adjustment cost coefficient, △Q W is the change of cooling medium flow, and c5 is a coefficient considering the valve action cost, △v is the change of gas valve opening degree.

[0083] In the above formula, △w, △Lv, △Q, and △v are functions of the adjustment cost function, and the corresponding control parameters (pressure and valve opening degree corresponding to the pressure, lye flow) of the electrolytic water hydrogen production unit are optimized and calculated (to achieve the lowest cost) based on the adjustment cost function at each adjustment, to obtain the adjustment value of the corresponding control parameters of the electrolytic water hydrogen production unit under the condition of the maximum net income function value, thereby calculating η 11 . 2 +V g,a (p-p0))(1 / V g,a -2 / V g,c ) / ρg

[0084] wherein N is the number of cells of the electrolytic hydrogen production system, F is the Faraday constant, U is the cell voltage, which is taken as a constant here due to a low change range, U=1.6-2.0V, ρ is the electrolyte density, g is the gravitational acceleration, V g,c is the volume of hydrogen-side gas of the system, V g,a is the volume of oxygen-side gas of the system, R is the ideal gas constant, T is the temperature, p is the pressure set value at the time of power change, p0 is the initial pressure value, and v is the maximum adjustment speed of hydrogen production power.

[0085] wherein △t 11 =(P-P0) / v. P-P0 is the power change value before and after △t 11 .

[0086] The mapping relationship between the allowable change value △w of gas purity and the maximum adjustment speed v of hydrogen production power is represented as: △w=f2(v,P,p,Q,τ p )

[0087] f2 represents the relationship between the change of gas purity (hydrogen in oxygen) during the power change process and the maximum regulation speed v, the final value of power change P (amplitude), the pressure set value p at the time of power change, the lye flow set value Q, and the lye pump delay τ. p It can be obtained by experiment or empirical formula.

[0088] In order to achieve the optimal economy and meet the demand of power exchange limit of power grid, the first electrolyzer power set value sequence in the period of t~t+T1 and the power station power set value sequence in the period of t~t+T1 are obtained, which need to meet the following five limit constraint conditions:

[0089] 1. Each first electrolyzer power set value in the first electrolyzer power set value sequence is located in the preset power range interval.

[0090] The preset power range interval of electrolyzer power set value is [P min , P max ], that is,

[0091] Each first electrolyzer power set value in the first electrolyzer power set value sequence satisfies:

[0092] 2. The power regulation speed corresponding to each first electrolyzer power set value in the first electrolyzer power set value sequence is less than or equal to the maximum regulation speed.

[0093] That is, the power regulation speed corresponding to each first electrolyzer power set value in the first electrolyzer power set value sequence changes in the range of:

[0094] 3. When the power-to-hydrogen coupling system is not allowed to go online, the off-grid power and off-grid power meet the off-grid limit, or when the off-grid is not allowed, the on-grid power and on-grid power meet the off-grid limit.

[0095] Specifically, when not allowed to go online, for k=0~n1-1,

[0096] The corresponding off-grid power limit is:

[0097] The off-grid power limit is:

[0098] Specifically, when not allowed to go offline: for k=0~n1-1,

[0099] The corresponding on-grid power limit is:

[0100] The on-grid power limit is:

[0101] In the above formula, P set,1 , W set，1 , P set,2 , W set,2 are all corresponding preset threshold values.

[0102] 4. The prediction accuracy of each power station power set value in the power station power set value sequence meets the accuracy error range.

[0103] At time t+k, considering the power prediction accuracy, the power of the electrolytic hydrogen production system can reach the error range of the power prediction value in the next moment:

[0104] When ,

[0105] When ,

[0106] 5. Each value in the power station power set value sequence in the t~t+T1 time period is less than or equal to the corresponding value in the power station power prediction value sequence in the t~t+T1 time period.

[0107] That is, it needs to meet:

[0108] S3, in the t~t+T3 time period, the power station power adjustment instruction is issued according to the power station power set value sequence, and the power station power measured value sequence in the t~t+T3 time period is obtained.

[0109] In the t~t+T3 time period, the power station power adjustment instruction is issued according to the power station power set value sequence, and the power station power measured value sequence in the t~t+T3 time period is obtained

[0110] S4, based on the power station power measured value sequence in the t~t+T3 time period, the first electrolytic cell power set value sequence in the t~t+T1 time period and the power station power set value sequence in the t~t+T1 time period, the second electrolytic cell power set value sequence in the t~t+T3 time period is determined.

[0111] According to the first electrolytic cell power set value sequence in the t~t+T1 time period determined above and the power station power set value sequence in the t~t+T1 time period and the power station power measured value sequence in the t~t+T3 time period , the second electrolytic cell power set value sequence in the t~t+T3 time period is determined

[0112] S5, based on the power measured value sequence in the t~t+T3 time period, the second electrolytic cell power set value sequence in the t~t+T3 time period and the first electrolytic cell power set value sequence in the t~t+T1 time period, determine the electrolytic cell power adjustment instruction sequence in the t~t+T3 time period, and in the t~t+T3 time period, according to the electrolytic cell power adjustment instruction sequence, issue the electrolytic cell power adjustment instruction.

[0113] As an implementable way, based on the second electrolytic cell power set value sequence in the t~t+T3 time period and the first electrolytic cell power set value sequence in the t~t+T1 time period, determine each electrolytic cell power adjustment instruction in the first electrolytic cell power adjustment instruction subsequence; based on each electrolytic cell power adjustment instruction in the first electrolytic cell power adjustment instruction subsequence, the power measured value sequence in the t~t+T3 time period and the first electrolytic cell power set value sequence in the t~t+T1 time period, determine each electrolytic cell power adjustment instruction in the second electrolytic cell power adjustment instruction subsequence; based on the first electrolytic cell power adjustment instruction subsequence and the second electrolytic cell power adjustment instruction subsequence, constitute the electrolytic cell power adjustment instruction subsequence in the t~t+T3 time period.

[0114] Wherein, based on the second electrolytic cell power set value sequence in the t~t+T3 time period and the first electrolytic cell power set value sequence in the t~t+T1 time period, determine each electrolytic cell power adjustment instruction in the first electrolytic cell power adjustment instruction subsequence, including the following steps: obtaining a plurality of first time corresponding to the first electrolytic cell power set value sequence in the t~t+T1 time period; obtaining a plurality of second time corresponding to the second electrolytic cell power set value sequence in the t~t+T3 time period; for each second time, if there is no time overlapping first time, the second electrolytic cell power set value corresponding to the second time is taken as the electrolytic cell target adjustment power corresponding to the second time; for each second time, if there is a time overlapping first time, the average value of the first electrolytic cell power set value and the second electrolytic cell power set value corresponding to the time overlapping time is taken as the electrolytic cell target adjustment power corresponding to the time overlapping time; based on the first electrolytic cell power set value sequence in the t~t+T1 time period, the prediction value resolution and the power station power instruction transmission period, calculate the electrolytic cell target power adjustment speed corresponding to each second time; according to the electrolytic cell target adjustment power corresponding to each second time and the electrolytic cell target power adjustment speed, generate each electrolytic cell power adjustment instruction in the first electrolytic cell power adjustment instruction subsequence.

[0115] Specifically:

[0116] For any l=0~n3,

[0117] At time t, i.e. l = 0:

[0118] For any g = 1 ~ T3*T res,2 / T res,1 , for At time t + l*T res,2 , the electrolytic tank power is the average of the second electrolytic tank power set value sequence in the period of t ~ t + T3 and the first electrolytic tank power set value sequence in the period of t ~ t + T1.

[0119] That is, at the point where the second electrolytic tank power set value sequence in the period of t ~ t + T3 and the first electrolytic tank power set value sequence in the period of t ~ t + T1 coincide, the electrolytic tank power takes the average of the two; the electrolytic tank power change takes the average of the power change determined by the first electrolytic tank power set value sequence in the period of t ~ t + T1 according to time.

[0120] For At time t + l*T res,2 , according to , the electrolytic tank power is obtained The specific calculation is as follows:

[0121] For the case where power generation is not allowed to be connected to the grid:

[0122] If , the anti-backflow device is triggered, and the power generation system is disconnected from the grid.

[0123] If

[0124] (if );

[0125] or (if )

[0126] That is, according to the real-time power of power generation, the hydrogen production power adjustment instruction is corrected, and the difference between the hydrogen production power determined by the predicted time point in the first electrolytic tank power set value sequence in the period of t ~ t + T1 and the real-time power of power generation is distributed to the remaining time.

[0127] For the case where power is not allowed to be connected to the grid:

[0128] If , the anti-backflow device is triggered, and the power generation system is disconnected from the grid.

[0129] If

[0130] (if );

[0131] or (if )

[0132] S6, obtain the measured electrolyzer power sequence in the time period of t~t+T3.

[0133] S7, at t+T3, update the first electrolyzer power set value sequence in the time period of t~t+T1 and the power station power set value sequence in the time period of t~t+T1 according to the power station power measured value sequence in the time period of t~t+T3 and the measured electrolyzer power sequence in the time period of t~t+T3.

[0134] After the update in S7, the new is obtained again according to the method in S2 to give the power station power adjustment instruction The power station power instruction is the value of the corresponding sequence number in the power station power obtained in S2, which is used as the value of in S3 as the power station power instruction executed at t+T3.

[0135] S8, take t+T3 as the new t, repeat the above S3~S7 until t+T2, update t and repeat the above S2~S7 to obtain the corresponding power station power adjustment instruction and electrolyzer power adjustment instruction at each time.

[0136] The embodiments of the present disclosure realize real-time matching of system dynamic adjustment characteristics by running control of new energy and hydrogen production modules in the system, so as to meet different power grid power interaction restriction requirements and realize high economic efficiency.

[0137] Further, in the present disclosure, the method for obtaining the maximum power and the minimum power of the preset power range interval of the electrolyzer power is as follows:

[0138] The upper limit of power refers to the maximum power value that the system can stably output. This parameter represents the highest power level that the system can reach under normal working conditions. The upper limit of power is usually expressed in watts (W), and exceeding this upper limit of power may cause system overload, damage or other adverse consequences. In the present disclosure, the upper limit of power is denoted as P max .

[0139] ​​wherein the power lower limit refers to the minimum power value that the system can stably output. This parameter represents the lowest power level that the system can achieve under normal operating conditions. The power lower limit is usually expressed in watts (W) and below this value may lead to system malfunctions, performance degradation or other problems. In the present disclosure, the power lower limit is denoted as P min .

[0140] wherein the maximum regulation speed refers to the speed of change of the system power value over time. It represents the amount of power increase per unit time, usually expressed in units of watts per second (W / s) or percentage per second, etc. In the present disclosure, the maximum regulation speed is denoted as v.

[0141] The determination methods of each of them are described below.

[0142] 1. The determination method of the power lower limit P min , comprising: obtaining the minimum value of the allowable operating pressure of the water electrolysis hydrogen production system at the current time; obtaining the minimum value of the allowable caustic solution flow rate of the water electrolysis hydrogen production system at the current time; determining the power lower limit based on the minimum value of the operating pressure and the minimum value of the caustic solution flow rate.

[0143] Specifically, the minimum value of the allowable operating pressure of the water electrolysis hydrogen production system at the current time p min is determined by the following formula: p min = max{p l , p(v m , i), p(L)}

[0144] wherein p l is the minimum value of the allowable operating pressure of the system, given by the manufacturer; p(v m , i) is the sum of the pressure drop generated by the gas flowing through the valve and the gas back pressure when the system is operating at the power lower limit and the gas valve opening is maximum (in the present disclosure, both the system oxygen side and the system hydrogen side need to be considered, i.e. p(v m , i) has two values at each time); p(L) is the pressure determined by the liquid level of the hydrogen gas separator.

[0145] wherein p(v m , i) is determined by the valve characteristics: p(v m , i) = dp(v) + p exit .

[0146] v is the speed of the gas passing through the valve when the system is operating at the power lower limit, i is the operating current at the power lower limit, dp(v) is the valve pressure drop at this speed, (ρ is the gas density passing through the valve, ζ is the valve characteristic coefficient, given by the supplier); p exit is the gas outlet pressure.

[0147] where p(L) = wgL + p0.

[0148] w is the density of the caustic solution in the electrolyzer system (determined by the density of the gas-liquid mixture), L is the difference between the liquid level in the gas-liquid separator and the reference level (e.g. the liquid level in the caustic storage tank), p0 is the reference pressure (e.g. the surface pressure of the caustic storage tank), and g is the acceleration of gravity.

[0149] Since the working current i at the lower limit of power is required in the formula, the determination method of p min requires a trial calculation. Specifically: the initial value of p min is determined according to p l = max{p min , p(L)}; using the initial value, the lower limit of power and the current i at the lower limit of power are determined through subsequent steps; the sizes of p(v m , i) and the initial value of p min are checked, if both p(v m , i) are less than or equal to p min , the lower limit of power uses the initial value; if there is any p(v m , i) > p min , the calculated p(v m , i) is taken as p min , and the trial calculation process is repeated.

[0150] Specifically, the minimum value of the caustic flow rate Q min allowed by the water electrolysis hydrogen production system at the current moment is determined by the following formula:

[0151] Q min = max{q0, Q(n)}

[0152] where q0 is the minimum working flow rate of the caustic pump; n is the minimum displacement frequency of the caustic per hour, Q(n) = V e n, V e is the effective liquid volume of the system, V = V c + V a . n should not be too small, and n that is too small will cause uneven heat dispersion and accumulation of impurities in the system. Optionally, n min is taken as 5-10. V c is the liquid volume on the hydrogen side of the system, and V a is the liquid volume on the oxygen side of the system.

[0153] Based on the above steps, the minimum value of the working pressure and the minimum value of the caustic flow rate allowed by the water electrolysis hydrogen production system at the current moment have been obtained, and the lower limit of power needs to be determined based on the minimum value of the working pressure and the minimum value of the caustic flow rate.

[0154] As an implementable manner, the mapping relationship between the hydrogen content in oxygen corresponding to the water electrolysis hydrogen production system (which can be expressed as HTO, which refers to the content of hydrogen mixed in oxygen gas at the outlet of the gas-liquid separator on the anode side (oxygen side) of the water electrolysis hydrogen production system) and the minimum working pressure, the minimum caustic solution flow rate, the temperature value and the current value is determined; according to the minimum working pressure and the minimum caustic solution flow rate, the current value I1 of the water electrolysis hydrogen production system when the hydrogen content in oxygen is less than a preset content threshold (for example, 2%) at the current temperature is determined in combination with the mapping relationship; the number N of small chambers of the electrolytic cell corresponding to the water electrolysis hydrogen production system and the small chamber voltage U1 of the electrolytic cell are obtained; the power lower limit P is calculated based on the number of small chambers, the small chamber voltage and the current value min , wherein P min =N*U1*I1.

[0155] For example, one form of the mapping relationship between the hydrogen content in oxygen corresponding to the water electrolysis hydrogen production system and the minimum working pressure, the minimum caustic solution flow rate, the temperature value and the current value is as follows:

[0156] The parameters a1-a5 in the formula are determined by the structure of the water electrolysis hydrogen production system, the electrolyte and the physical and chemical properties of the gas. Specifically, a1=DSAN / d a2=S / 4 a4=V s,an V l,a S O2 V g,a / R

[0157] Wherein: D is the effective diffusion coefficient of hydrogen through the diaphragm of the water electrolysis hydrogen production system, S is the solubility of hydrogen in caustic solution, d is the thickness of the diaphragm of the water electrolysis hydrogen production system, A is the effective area of the water electrolysis hydrogen production system, N is the number of small chambers of the water electrolysis hydrogen production system, K is the permeability coefficient of the diaphragm of the water electrolysis hydrogen production system, ζ is the dynamic viscosity of the electrolyte, F is the Faraday constant, V s,an is the total volume of the liquid on the anode side of the water electrolysis hydrogen production system, R is the ideal gas constant, V g,a is the sum of the volume of the container above the liquid surface of the gas-liquid separator on the oxygen side (anode side) and the volume between the gas outlet pipe of the separator and the gas valve, V l,a is the volume of the liquid in the gas-liquid separator on the oxygen side (anode side), S O2 is the solubility of oxygen in caustic solution.

[0158] Optionally, the system power lower limit can also be determined by experiment. The specific method is: adjusting the system to work stably under rated conditions; reducing the system power, and simultaneously reducing the system pressure and the system flow rate; obtaining the power lower limit when the purity approaches the safety limit of 2%.

[0159] 2. power upper limit P max The determination method comprises the following steps:

[0160] The highest voltage U2 allowed by the electrode catalytic layer material of the water electrolysis hydrogen production system is obtained, based on the highest voltage U2, the corresponding voltage-current curve of the water electrolysis hydrogen production system (the working curve of the water electrolysis hydrogen production cell, given by the cell manufacturer or obtained by experiment) is inquired to determine the maximum current value I2 corresponding to the water electrolysis hydrogen production system, and the first power upper limit P1 is calculated based on the number of cells N, the cell voltage U2 and the maximum current value I2, wherein P1=N×U2×I2.

[0161] The highest working temperature allowed by the diaphragm material of the water electrolysis hydrogen production system is obtained, and the corresponding power value when the cooling medium flow of the water electrolysis hydrogen production system reaches the maximum allowed flow at the highest temperature is obtained as the second power upper limit P2.

[0162] Wherein, the heat dissipation Q of the water electrolysis hydrogen production system is equal to the maximum heat exchange capacity of the cooling equipment. Q=N(U2-U rev )×I2=c×q m ×△T

[0163] In the above formula, c is the specific heat capacity of the cooling medium; q m is the maximum value of the cooling medium flow; △T is the temperature difference of the cooling medium; U rev is the thermal neutral voltage of the electrolytic cell, which is 1.48V, and N is the number of cells.

[0164] Wherein, the highest working temperature is determined according to the tolerable temperature of the diaphragm material, which is given by the diaphragm material manufacturer; for example, for Zirfon membrane commonly used in alkaline electrolytic cell, the highest long-term working temperature can be tolerated is 100 degrees Celsius. The cooling medium flow limit is determined according to the economic working range of the heat exchange equipment, which is given by the equipment manufacturer.

[0165] After determining the first power upper limit and the second power upper limit based on different ideas as described above, the minimum value of the first power upper limit and the second power upper limit is taken as the power upper limit. That is, P max =min{P1,P2}.

[0166] Alternatively, the system power upper limit can also be determined by experiment. The specific method is: adjust the system to work stably under rated state, adjust the pressure to the lowest allowable pressure; increase the system current and record the voltage / temperature; when the voltage / temperature approaches the maximum allowable voltage / temperature, the power upper limit is obtained.

[0167] 3. The determination method of the maximum adjustment speed v comprises the following steps:

[0168] The difference between the maximum liquid level difference and the initial liquid level difference of the electrolytic water hydrogen production system at the current time is taken as the liquid level difference allowable change value Lv, and the mapping relationship between the liquid level difference allowable change value Lv and the maximum adjustment speed is obtained, to obtain the first power speed v of the electrolytic water hydrogen production system corresponding to the power rising process of the electrolytic water hydrogen production system at the current time + P,1 .

[0169] For example, the mapping relationship between the liquid level difference allowable change value Lv and the first power speed is represented as: Lv = f1(v + P,1 ,P)

[0170] f1 represents the relationship between the liquid level difference change in the hydrogen separator and the oxygen separator and the maximum speed of power change, the final value P (amplitude) of power change, and the pressure set value at the time of power change during the power change process. It can be obtained by experiment or empirical formula. For example, one form is as follows: Lv = (kRT x v + P,1 x (△t 11 ) 2 + V g,a (p-p0))(1 / V g,a -2 / V g,c ) / pg

[0171] where, N is the number of cells of the electrolytic hydrogen production system, F is the Faraday constant, U is the cell voltage, which is taken as a constant here due to the low range of U variation, U = 1.6-2.0V, p is the electrolyte density, g is the acceleration of gravity, V g,c is the hydrogen side gas volume of the system, V g,a is the oxygen side gas volume of the system, R is the ideal gas constant, T is the temperature, p is the pressure set value at the time of power change, and p0 is the initial pressure.

[0172] where, △t 11 = (P-P0) / v + P,1 P-P0 is the power change value before and after △t 11 .

[0173] The difference between the maximum gas purity and the initial gas purity of the electrolytic water hydrogen production system at the current time is taken as the gas purity allowable change value w, and the mapping relationship between the gas purity allowable change value w and the power rising speed is obtained, to obtain the second power rising speed v of the electrolytic water hydrogen production system corresponding to the power rising process of the electrolytic water hydrogen production system at the current time + P,2 .

[0174] Exemplarily, the mapping relationship between the allowable variation value of gas purity △w and the second power rising speed is expressed as: △w=f2(v + P,2 P, p, Q, τ p )

[0175] F2 represents the relationship between the variation of gas purity (hydrogen in oxygen) and the maximum speed of power variation, the final value of power variation P (amplitude), the pressure set value p at the time of power variation, the caustic lye flow set value Q, and the caustic lye pump delay τ p . It can be obtained by experiment or empirical formula.

[0176] Exemplarily, one form is as follows:

[0177] △w=max{f(P1,p1,Q1),f(P2,p2,Q2),f(P3,p3,Q3)}

[0178] The form of f can be referred to above:

[0179] wherein P1, p1, Q1 represent the power, pressure, and caustic lye flow at τ p ,△t 21 ,△t2, τ p ,△t 21 ,△t2 represent the three time periods of p, Q variation, wherein in the 0-τ p period, the caustic lye pump changes the flow from Q0 to Q due to control delay, and changes to Q at τ p and maintains; in the 0-△t2 period, the pressure slowly changes from p0 to p after the set pressure value p is set, the change process is affected by the gas volume on the anode side and the power (i.e. the gas generation amount), and the pressure changes to p at △t2. The pressure change often lags behind the power change, so △t2>△t 21 ,△t 21 =(P-P0) / v + P,2 , which is the time required for power variation to occur.

[0180] wherein:

[0181] P1=P0+v + P,2 ×(τ e ), from which the corresponding current (according to the voltage-current curve of the water electrolysis hydrogen production system (electrolysis hydrogen production cell working curve, given by the electrolysis cell manufacturer or obtained by experiment), the corresponding point of voltage, current product equal to P1 is obtained on the curve), the current value is substituted into f for calculation.

[0182] p1=kRT×v +P,2 x (τ e ) 2 / 2V g,a + p0

[0183] Q1 = Q

[0184] P2 = P

[0185] p2 = kRT x v + P,2 x (△t 21 ) 2 / 2V g,a + p0, wherein△t 21 = (P - P0) / v + P,2 ;

[0186] Q2 = Q

[0187] P3 = P

[0188] p3 = p

[0189] Q3 = Q

[0190] Further, the minimum value of the first power rising speed v + P,1 and the second power rising speed v + P,2 is taken as the maximum adjustment speed v. It is represented as v = min{v + P,1 , v + P,2}.

[0191] Figure 2 is a schematic diagram of an electric-hydrogen coupling system according to the present disclosure, as shown in Figure 2, the electric-hydrogen coupling system comprises an energy management module, a new energy power generation module, and an electrolytic hydrogen production module, wherein:

[0192] The energy management module comprises an electric-hydrogen coupling control unit, a power station power prediction unit, a power station control unit, and an electrolytic hydrogen production control unit.

[0193] The electric-hydrogen coupling control unit is used to generate power station power adjustment instructions and electrolytic cell power adjustment instructions.

[0194] The power station power prediction unit is used to realize power station power prediction in a prediction period.

[0195] The power station control unit is used to receive the power station power adjustment instructions sent by the electric-hydrogen coupling control unit and realize control of the power station power and real-time transmission of the power.

[0196] The electrolytic hydrogen production unit system is configured to receive the electrolysis cell power adjustment instruction sent by the electric-hydrogen coupling control unit and control the power of the electrolytic hydrogen production unit.

[0197] To achieve the above-mentioned embodiments, the embodiments of the present disclosure further propose an electronic device 300 as shown in FIG. 3, which comprises a processor 301 and a memory 302 in communication connection with the processor 301, and the memory 302 stores instructions executable by the at least one processor 301, and the instructions are executed by the at least one processor 301 to implement the operation control method of the electric-hydrogen coupling system as shown in the above-mentioned embodiments.

[0198] To achieve the above-mentioned embodiments, the embodiments of the present disclosure further propose a non-transitory computer-readable storage medium storing computer instructions, wherein the computer instructions are used to cause a computer to implement the operation control method of the electric-hydrogen coupling system as shown in the above-mentioned embodiments.

[0199] To achieve the above-mentioned embodiments, the embodiments of the present disclosure further propose a computer program product comprising a computer program, which, when executed by a processor, implements the operation control method of the electric-hydrogen coupling system as shown in the above-mentioned embodiments.

[0200] In the description of the present disclosure, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present disclosure.

[0201] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present disclosure, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0202] In the description of the present disclosure, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present disclosure. In the present description, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in any one or more embodiments or examples. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the present description and the features of the different embodiments or examples without contradiction.

[0203] It should be noted that in the embodiments of the present disclosure, some software, components, models and the like in the industry are mentioned, which should be considered as exemplary, and the purpose is only to illustrate the feasibility of the implementation of the technical solutions of the present disclosure, but it does not mean that the applicant has or will necessarily use the scheme.

[0204] Although the embodiments of the present disclosure have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as a limitation of the present disclosure, and the person skilled in the art can make changes, modifications, replacements and modifications to the above embodiments within the scope of the present disclosure.

Claims

1. An operation control method for an electric-hydrogen coupling system, comprising: S1, obtaining prediction-related parameters and power station power instruction-related parameters corresponding to the power station power, wherein the prediction-related parameters include a prediction period T1 and a rolling period T2, and the power station power instruction-related parameters include a power station power instruction transmission delay T3, wherein T1>T3; S2, based on the measured power value of the power plant corresponding to time t, the measured power value of the electrolyzer corresponding to time t, and the sequence of predicted power plant power values ​​in the time period from t to t+T1, with the goal of optimizing economic efficiency and simultaneously satisfying the interactive restriction requirements of the power grid, obtain a first electrolyzer power set value sequence in the time period from t to t+T1 and a power plant power set value sequence in the time period from t to t+T1; S3, during the time period from t to t+T3, issuing a power regulation instruction for the power station according to the power station power setting value sequence, and obtaining a power station power measured value sequence during the time period from t to t+T3; S4, determining a second electrolytic cell power setting value sequence in the time period t to t+T3 based on the power plant power measured value sequence in the time period t to t+T3, the first electrolytic cell power setting value sequence in the time period t to t+T1, and the power plant power setting value sequence in the time period t to t+T1; S5, based on the sequence of measured power values ​​of the power station in the time period t to t+T3, the sequence of set power values ​​of the second electrolyzer in the time period t to t+T3, and the sequence of set power values ​​of the first electrolyzer in the time period t to t+T1, determining the electrolyzer power adjustment instruction sequence for the time period t to t+T3, and issuing the electrolyzer power adjustment instruction according to the electrolyzer power adjustment instruction sequence in the time period t to t+T3; S6, obtaining a sequence of measured values ​​of the electrolytic cell power within the time period t to t+T3; S7, at time t+T3, updating the first electrolytic cell power setting value sequence within the time period t to t+T1 and the power station power setting value sequence within the time period t to t+T1 based on the power station power measured value sequence within the time period t to t+T3 and the electrolytic cell power measured value sequence within the time period t to t+T3; S8, take time t+T3 as the new t, repeat the above S3~S7 until time t+T2, update t, and repeat the above S2~S7 to obtain the power station power adjustment instructions and electrolyzer power adjustment instructions corresponding to each moment.

2. The method according to claim 1, wherein The prediction-related parameters also include prediction accuracy and prediction value resolution; the power station power instruction-related parameters also include a power station power instruction transmission period, and the instruction issuance period of the electrolytic cell power adjustment instruction is not greater than the power station power instruction transmission period.

3. The method according to claim 2, wherein: In S2, the corresponding benefit function for the purpose of economic optimization is: W=Max(R H2 +R V -C H2 -C b -C dH2 ) In the above formula, W is the total revenue, R H2 is the hydrogen production income of the electrolytic hydrogen production unit, R V C is the power generation income when the electricity-hydrogen coupling system is allowed to be connected to the grid or the penalty cost when it is not allowed to be connected to the grid. H2 is the operation and maintenance cost of the electrolytic hydrogen production unit, C b C is the cost of disconnection when the electricity-hydrogen coupling system allows disconnection or the penalty cost when disconnection is not allowed. dH2 The power regulation cost of the electrolytic hydrogen production unit is related to the power regulation amplitude.

4. The method according to claim 3, wherein: The calculation formulas for the various parameters involved in the profit function include: η dH2 =[η dH2,1 ,…,η dH2,n1 ] In the above formula, is the power setting value sequence of the power station in the time period from t to t+T1; is the first electrolytic cell power setting value sequence within the time period t to t+T1; In the above formula, η H2 is the hydrogen-to-electricity conversion efficiency of the electrolytic hydrogen production unit; is the price of hydrogen during the period t~t+T1, which is determined by market dynamics; T res,1 is the predicted value resolution; In the above formula, η E It is the efficiency of power transmission from the power station to the grid, which is related to factors such as line loss; is the on-grid electricity price or penalty cost during the time period t~t+T1. The on-grid electricity price is determined by market dynamics; the penalty cost is determined by the penalty action caused by on-grid operation. In the above formula, η C,H2 is the variable cost of hydrogen production by electrolysis; is the fixed cost per unit time for hydrogen production by electrolysis, which is related to the depreciation rate; is the rated power of hydrogen production by electrolysis hydrogen production unit; In the above formula, is the off-grid electricity price or penalty cost during the time period t~t+T1. The off-grid electricity price is determined by market dynamics, and the penalty cost is determined by the penalty action caused by off-grid operation. In the above formula, η dH2 It is the cost of each adjustment of hydrogen production by electrolysis during the time period from t to t+T1, which is related to the power change of each adjustment.

5. The method according to claim 4, wherein In S2, with the goal of economic optimization and at the same time meeting the interactive power restriction requirements of the power grid, the following constraints must be met when obtaining the first electrolyzer power setting value sequence within the time period t~t+T1 and the power station power setting value sequence within the time period t~t+T1: Each first electrolytic cell power setting value in the first electrolytic cell power setting value sequence is within a preset power range; The power adjustment speed corresponding to each first electrolytic cell power setting value in the first electrolytic cell power setting value sequence is less than or equal to the maximum adjustment speed; The electric-hydrogen coupling system does not allow the off-grid power and off-grid electricity to meet the off-grid restrictions when it is online, or does not allow the on-grid power and on-grid electricity to meet the off-grid restrictions when it is offline; The prediction accuracy of each power station power setting value in the power station power setting value sequence satisfies the accuracy error range.

6. The method according to claim 5, wherein: In the method, each value in the power station power setting value sequence within the time period t to t+T1 is less than or equal to the corresponding value in the power station power prediction value sequence within the time period t to t+T1.

7. The method according to claim 6, wherein: In said S5, based on the sequence of measured power values ​​of the power station in the time period t to t+T3, the sequence of set power values ​​of the second electrolyzer in the time period t to t+T3, and the sequence of set power values ​​of the first electrolyzer in the time period t to t+T1, determining the sequence of electrolyzer power adjustment instructions in the time period t to t+T3 includes: Determining each electrolytic cell power adjustment instruction in the first electrolytic cell power adjustment instruction subsequence based on the second electrolytic cell power setting value sequence within the time period t to t+T3 and the first electrolytic cell power setting value sequence within the time period t to t+T1; Determine each electrolyzer power adjustment instruction in the second electrolyzer power adjustment instruction subsequence based on each electrolyzer power adjustment instruction in the first electrolyzer power adjustment instruction subsequence, the power station power measured value sequence in the time period t to t+T3, and the first electrolyzer power set value sequence in the time period t to t+T1; An electrolytic cell power adjustment instruction subsequence for a time period of t to t+T3 is formed based on the first electrolytic cell power adjustment instruction subsequence and the second electrolytic cell power adjustment instruction subsequence.

8. The method according to claim 7, wherein: The determining of each electrolytic cell power adjustment instruction in the first electrolytic cell power adjustment instruction subsequence based on the second electrolytic cell power setting value sequence within the time period t to t+T3 and the first electrolytic cell power setting value sequence within the time period t to t+T1 includes: Obtain multiple first moments corresponding to a first electrolytic cell power setting value sequence within a time period of t to t+T1; Obtain multiple second moments corresponding to the second electrolytic cell power setting value sequence within the time period t to t+T3; For each second moment, if there is no first moment that overlaps with the second moment, the second electrolytic cell power setting value corresponding to the second moment is used as the electrolytic cell target adjustment power corresponding to the second moment; For each second moment, if there is a first moment at which the second moment coincides with the first moment, obtaining the average of the first electrolytic cell power setting value and the second electrolytic cell power setting value corresponding to the coincident moment as the electrolytic cell target adjustment power corresponding to the coincident moment; Calculate the target power adjustment speed of the electrolyzer corresponding to each second moment based on the first electrolyzer power setting value sequence, the prediction value resolution, and the power station power instruction transmission cycle within the time period t to t+T1; Each electrolytic cell power adjustment instruction in the first electrolytic cell power adjustment instruction subsequence is generated according to the electrolytic cell target adjustment power and the electrolytic cell target power adjustment speed corresponding to each second moment.

9. An electric-hydrogen coupling system, wherein: It includes energy management module, new energy power generation module, and electrolysis hydrogen production module, including: The energy management module includes an electric-hydrogen coupling control unit, a power station power prediction unit, a power station control unit and an electrolysis hydrogen production control unit; The electric-hydrogen coupling control unit is used to generate power station power regulation instructions and electrolyzer power regulation instructions; The power station power prediction unit is used to realize power station power prediction within a prediction period; The power station control unit is used to receive the power station power adjustment instruction sent by the electric-hydrogen coupling control unit and realize the control of the power station power and the real-time power transmission; The electrolytic hydrogen production unit is used to receive the electrolyzer power adjustment instruction sent by the electric-hydrogen coupling control unit and realize the control of the power of the electrolytic hydrogen production unit.

10. An electronic device comprising: at least one processor; as well as a memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the method according to any one of claims 1 to 8.

Images