A method and system for hydrogen electric coupling system active device configuration

Abstract

The application discloses a method and system for active device configuration of a hydrogen-electricity coupling system, and belongs to the technical field of active configuration. The method comprises the following steps: determining a limiting factor for active device configuration of the hydrogen-electricity coupling system; selecting specific typical operation mode data of the hydrogen-electricity coupling system; under the specific typical operation mode data, configuring new energy unit installed capacity and new energy unit output based on the limiting factor; under the specific typical operation mode data, performing simulation calculation on the hydrogen-electricity coupling system configured with the new energy unit installed capacity and the new energy unit output based on the limiting factor, judging the simulation result, outputting a configuration scheme according to the judgment result, and performing active device configuration on the hydrogen-electricity coupling system by using the configuration scheme. The application can reasonably configure the hydrogen-electricity coupling system, and ensures that the hydrogen-electricity coupling system will not have operation risks after being connected to a power grid.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of active configuration, and more particularly, to a method and system for active device configuration of a hydrogen-electricity coupling system. BACKGROUND

[0002] Hydrogen fuel is an environmentally friendly energy source that uses hydrogen and oxygen to generate energy, and has the characteristics of high efficiency and zero emissions, so it has gradually attracted attention. Especially in coastal industrial and commercial areas, there is a strong demand for hydrogen nearby, and hydrogen-electricity coupling microgrids have good application prospects. As the demand for hydrogen fuel grows, hydrogen production technology will inevitably undergo a leap forward. Hydrogen is generally produced by electrolysis of water, accompanied by the production of oxygen.

[0003] In addition, because a large amount of electricity is needed to produce hydrogen, combined with the development of today's power systems, such as the hot development of clean energy forms such as photovoltaic and wind power, a new hydrogen-electricity coupling system is proposed, which forms a whole by bundling photovoltaic, wind power, hydrogen production load and supporting equipment, and then connects to the traditional alternating current grid. Whether from the perspective of the hydrogen-electricity coupling system itself or the impact of the hydrogen-electricity coupling system on the overall power grid after it is connected to the grid, a reasonable active configuration must be made to ensure the stable operation of the power system. SUMMARY

[0004] To solve the above problems, the present application provides a method for active device configuration of a hydrogen-electricity coupling system, comprising:

[0005] determining the limiting factors for active device configuration of the hydrogen-electricity coupling system;

[0006] selecting specific typical operating mode data of the hydrogen-electricity coupling system, and under the specific typical operating mode data, configuring new energy unit capacity and new energy unit output based on the limiting factors;

[0007] under the specific typical operating mode data, based on the limiting factors, simulating the hydrogen-electricity coupling system configured with new energy unit capacity and new energy unit output, judging the simulation results, and outputting a configuration scheme according to the judgment results;

[0008] configuring the hydrogen-electricity coupling system with active devices according to the configuration scheme.

[0009] Optionally, the limiting factors include the thermal stability limit of the alternating current line, the short-circuit current level of the bus, and the new energy high-voltage off-grid risk.

[0010] Optionally, the simulation results include:

[0011] Simulation calculation results of busbar short circuit current in hydrogen-electricity coupling system and busbar short circuit current in near area of hydrogen-electricity coupling system;

[0012] Simulation calculation results of new energy transient voltage after various AC and DC faults in near area of hydrogen-electricity coupling system.

[0013] Optionally, under the specific typical operation mode data, based on the limiting factor, the hydrogen-electricity coupling system with configured new energy unit installed capacity and new energy unit output is simulated and calculated, the simulation results are judged, and according to the judgment result, a configuration scheme is output, including:

[0014] Step 1: using the specific typical operation mode data, simulation calculation is performed to obtain busbar short circuit current in hydrogen-electricity coupling system and busbar short circuit current in near area of hydrogen-electricity coupling system, and it is judged whether the busbar short circuit current in hydrogen-electricity coupling system and the busbar short circuit current in near area of hydrogen-electricity coupling system are over standard, if over standard, then the specific typical operation mode data is reselected, until the busbar short circuit current in hydrogen-electricity coupling system and the busbar short circuit current in near area of hydrogen-electricity coupling system are not over standard, and step 2 is entered;

[0015] Step 2: the reselected specific typical operation mode data is determined as final mode data, using the final mode data, simulation calculation is performed to obtain new energy transient voltage after various AC and DC faults in near area of hydrogen-electricity coupling system, and it is judged whether the new energy transient voltage after various AC and DC faults in near area of hydrogen-electricity coupling system is within a reasonable range, if within the reasonable range, then the unit installed capacity and output of new energy are determined, and the configuration is performed according to thermal stability limit of hydrogen-electricity coupling system and main grid tie line, if not within the reasonable range, then step 3 is entered;

[0016] Step 3: after adding 1 phase-modulating machine in hydrogen-electricity coupling system, simulation calculation is performed to obtain new energy transient voltage after various AC and DC faults in near area of hydrogen-electricity coupling system, and it is judged whether the new energy transient voltage after various AC and DC faults in near area of hydrogen-electricity coupling system is within a reasonable range, if not, continue to increase the number of phase-modulating machines, until the new energy transient voltage after various AC and DC faults in near area of hydrogen-electricity coupling system is within a reasonable range, and the busbar short circuit current in hydrogen-electricity coupling system and the busbar short circuit current in near area of hydrogen-electricity coupling system are re-simulated and calculated, and it is judged whether the busbar short circuit current in hydrogen-electricity coupling system and the busbar short circuit current in near area of hydrogen-electricity coupling system are over standard, if not over standard, then the active power configuration of the hydrogen-electricity coupling system is output, and according to the active power configuration, a configuration scheme is output, if over standard, then step 4 is entered;

[0017] Step 4: In the hydrogen-electricity coupling system after the phase modifier is added in step 3, one phase modifier is reduced until the short-circuit current of the bus in the hydrogen-electricity coupling system and the bus in the vicinity of the hydrogen-electricity coupling system is not over-standard, the total number of the phase modifiers is determined, whether the new energy transient voltage after various AC and DC faults in the vicinity of the hydrogen-electricity coupling system is in a reasonable range is judged, if it is in the reasonable range, the active configuration of the hydrogen-electricity coupling system is output, and the configuration scheme is output according to the active configuration, if it is not in the reasonable range, step 5 is performed;

[0018] Step 5: The output of the new energy in the hydrogen-electricity coupling system is reduced, the new energy transient voltage after various AC and DC faults in the vicinity of the hydrogen-electricity coupling system is obtained through simulation calculation, and whether the new energy transient voltage after various AC and DC faults in the vicinity of the hydrogen-electricity coupling system is in a reasonable range is judged, if it is not, the output of the new energy in the hydrogen-electricity coupling system is continuously reduced until the new energy transient voltage after various AC and DC faults in the vicinity of the hydrogen-electricity coupling system is in a reasonable range, the active configuration of the hydrogen-electricity coupling system is output, and the configuration scheme is output according to the active configuration.

[0019] In still another aspect, the present application further provides a system for active device configuration of a hydrogen-electricity coupling system, comprising:

[0020] An initial unit is configured to determine a limiting factor for active device configuration of the hydrogen-electricity coupling system;

[0021] A data selection unit is configured to select specific typical operating mode data of the hydrogen-electricity coupling system, and configure the installed capacity of the new energy unit and the output of the new energy unit based on the limiting factor under the specific typical operating mode data;

[0022] A simulation calculation unit is configured to perform simulation calculation on the hydrogen-electricity coupling system after the installed capacity of the new energy unit and the output of the new energy unit are configured based on the limiting factor under the specific typical operating mode data, judge the simulation result, and output a configuration scheme according to the judgment result;

[0023] A configuration unit is configured to perform active device configuration on the hydrogen-electricity coupling system according to the configuration scheme.

[0024] Optionally, the limiting factor includes the thermal stability limit of the AC line, the short-circuit current level of the bus, and the high-voltage off-grid risk of the new energy.

[0025] Optionally, the simulation result includes:

[0026] Simulation calculation results of the short-circuit current of the bus in the hydrogen-electricity coupling system and the bus in the vicinity of the hydrogen-electricity coupling system;

[0027] Simulation calculation results of the new energy transient voltage after various AC and DC faults in the vicinity of the hydrogen-electricity coupling system.

[0028] Optionally, the simulation calculation unit, based on the limiting factors, performs simulation calculation on the hydrogen-electricity coupling system with the configured new energy unit capacity and new energy unit output under the specific typical operation mode data, judges the simulation result, and outputs a configuration scheme according to the judgment result, including:

[0029] Step 1: using the specific typical operation mode data, simulation calculation is performed to obtain the short-circuit current of the bus in the hydrogen-electricity coupling system and the bus in the vicinity of the hydrogen-electricity coupling system, and it is judged whether the short-circuit current of the bus in the hydrogen-electricity coupling system and the bus in the vicinity of the hydrogen-electricity coupling system is over-standard, if it is over-standard, the specific typical operation mode data is reselected until the short-circuit current of the bus in the hydrogen-electricity coupling system and the bus in the vicinity of the hydrogen-electricity coupling system is not over-standard, and step 2 is entered;

[0030] Step 2: the reselected specific typical operation mode data is determined as the final mode data, using the final mode data, simulation calculation is performed to obtain the new energy transient voltage after various AC and DC faults in the vicinity of the hydrogen-electricity coupling system, and it is judged whether the new energy transient voltage after various AC and DC faults in the vicinity of the hydrogen-electricity coupling system is within a reasonable range, if it is within a reasonable range, the unit capacity and output of the new energy are determined, the configuration is performed according to the thermal stability limit of the hydrogen-electricity coupling system and the main grid tie line, if it is not within a reasonable range, step 3 is entered;

[0031] Step 3: after adding one phase-modulating machine in the hydrogen-electricity coupling system, simulation calculation is performed to obtain the new energy transient voltage after various AC and DC faults in the vicinity of the hydrogen-electricity coupling system, and it is judged whether the new energy transient voltage after various AC and DC faults in the vicinity of the hydrogen-electricity coupling system is within a reasonable range, if it is not, the number of phase-modulating machines is continuously increased until the new energy transient voltage after various AC and DC faults in the vicinity of the hydrogen-electricity coupling system is within a reasonable range, and the short-circuit current of the bus in the hydrogen-electricity coupling system and the bus in the vicinity of the hydrogen-electricity coupling system is re-calculated, and it is judged whether the short-circuit current of the bus in the hydrogen-electricity coupling system and the bus in the vicinity of the hydrogen-electricity coupling system is over-standard, if it is not over-standard, the active power configuration of the hydrogen-electricity coupling system is output, and a configuration scheme is output according to the active power configuration, if it is over-standard, step 4 is entered;

[0032] Step 4: one phase-modulating machine is reduced in the hydrogen-electricity coupling system after the phase-modulating machine is added in step 3, until the short-circuit current of the bus in the hydrogen-electricity coupling system and the bus in the vicinity of the hydrogen-electricity coupling system is not over-standard, the total number of phase-modulating machines is determined, it is judged whether the new energy transient voltage after various AC and DC faults in the vicinity of the hydrogen-electricity coupling system is within a reasonable range, if it is within a reasonable range, the active power configuration of the hydrogen-electricity coupling system is output, and a configuration scheme is output according to the active power configuration, if it is not within a reasonable range, step 5 is performed;

[0033] Step 5: reduce the new energy output in the hydrogen-electricity coupling system, simulate to obtain the new energy transient voltage after various AC and DC faults in the hydrogen-electricity coupling system, and judge whether the new energy transient voltage after various AC and DC faults in the hydrogen-electricity coupling system is within a reasonable range; if not, continue to reduce the new energy output in the hydrogen-electricity coupling system until the new energy transient voltage after various AC and DC faults in the hydrogen-electricity coupling system is within a reasonable range, output the active configuration of the hydrogen-electricity coupling system, and output the configuration scheme according to the active configuration.

[0034] In still another aspect, the present application further provides a computing device, comprising: one or more processors;

[0035] a processor configured to execute one or more programs;

[0036] When the one or more programs are executed by the one or more processors, the method as described above is implemented.

[0037] In still another aspect, the present application further provides a computer readable storage medium having a computer program stored thereon, wherein the computer program is executed to implement the method as described above.

[0038] Compared with the prior art, the present application has the following beneficial effects:

[0039] The present application provides a method for active device configuration of a hydrogen-electricity coupling system, comprising: determining the limiting factor of active device configuration of the hydrogen-electricity coupling system; selecting specific typical operating mode data of the hydrogen-electricity coupling system, and configuring the installed capacity of new energy units and the output of new energy units based on the limiting factor under the specific typical operating mode data; under the specific typical operating mode data, performing simulation calculation on the hydrogen-electricity coupling system with the configured installed capacity of new energy units and the output of new energy units based on the limiting factor, judging the simulation result, outputting a configuration scheme according to the judgment result, and performing active device configuration on the hydrogen-electricity coupling system according to the configuration scheme. The present application can perform reasonable active configuration on the hydrogen-electricity coupling system, and ensure that there is no operation risk after the hydrogen-electricity coupling system is connected to the grid. BRIEF DESCRIPTION OF DRAWINGS

[0040] Figure 1 The flowchart of the method of the present application;

[0041] Figure 2 The flowchart of the embodiment of the method of the present application;

[0042] Figure 3 The hydrogen-electricity coupling system near-zone power grid structure diagram of scenario one of the embodiment of the method of the present application;

[0043] Figure 4A structure diagram of a near-zone power grid of a hydrogen-electricity coupling system for a scenario of an embodiment of the method of the application;

[0044] Figure 5 A schematic diagram of DC "3+1" fault Qing four and new energy unit terminal voltage when no phase modifier is configured for an embodiment of the method of the application;

[0045] Figure 6 A schematic diagram of DC "3+1" fault Qing four and new energy unit terminal voltage when 2 phase modifiers are configured for an embodiment of the method of the application;

[0046] Figure 7 A schematic diagram of DC "3+1" fault Qing four and new energy unit terminal voltage for an embodiment of the method of the application;

[0047] Figure 8 A structure diagram of the system of the application. DETAILED DESCRIPTION

[0048] Reference will now be made to the drawings to describe the exemplary embodiments of the application in detail. The application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and fully convey the scope of the application to those skilled in the art. The terminology used in the description of the exemplary embodiments presented herein is not intended to be limiting. Rather, the terminology is used by describing specific embodiments of the application to convey the scope of the application to those who are knowledgeable in the art.

[0049] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0050] Embodiment 1:

[0051] The application proposes a method for active device configuration of a hydrogen-electricity coupling system, as shown in Figure 1 The method comprises the following steps:

[0052] Step 1: determining the limiting factor for active device configuration of the hydrogen-electricity coupling system;

[0053] Step 2: selecting specific typical operating mode data of the hydrogen-electricity coupling system, and configuring new energy unit installed capacity and new energy unit output under the specific typical operating mode data based on the limiting factor;

[0054] Step 3, based on the limiting factors, simulating the hydrogen-electricity coupling system with the configured new energy unit installed capacity and new energy unit output under the specific typical operating mode data, judging the simulation results, and outputting a configuration scheme according to the judgment results;

[0055] Step 4, configuring the active device of the hydrogen-electricity coupling system according to the configuration scheme.

[0056] The limiting factors include the thermal stability limit of the AC line, the short-circuit current level of the bus, and the new energy high-voltage off-grid risk.

[0057] The simulation results include:

[0058] The simulation results of the short-circuit current of the bus in the hydrogen-electricity coupling system and the bus in the near area of the hydrogen-electricity coupling system;

[0059] The simulation results of the new energy transient voltage after various AC and DC faults in the near area of the hydrogen-electricity coupling system.

[0060] The simulation results of the short-circuit current of the bus in the hydrogen-electricity coupling system and the bus in the near area of the hydrogen-electricity coupling system;

[0061] Step 1: using the specific typical operating mode data, simulating to obtain the short-circuit current of the bus in the hydrogen-electricity coupling system and the bus in the near area of the hydrogen-electricity coupling system, and judging whether the short-circuit current of the bus in the hydrogen-electricity coupling system and the bus in the near area of the hydrogen-electricity coupling system is over-standard, if it is over-standard, then reselecting the specific typical operating mode data until the short-circuit current of the bus in the hydrogen-electricity coupling system and the bus in the near area of the hydrogen-electricity coupling system is not over-standard, and entering Step 2;

[0062] Step 2: determining the reselected specific typical operating mode data as the final mode data, using the final mode data, simulating to obtain the new energy transient voltage after various AC and DC faults in the near area of the hydrogen-electricity coupling system, and judging whether the new energy transient voltage after various AC and DC faults in the near area of the hydrogen-electricity coupling system is within a reasonable range, if it is within a reasonable range, then determining the unit installed capacity and output of the new energy, and configuring according to the thermal stability limit of the hydrogen-electricity coupling system and the main grid tie line, if it is not within a reasonable range, then entering Step 3;

[0063] Step 3: After adding a phase modifier in the hydrogen-electricity coupling system, the transient voltage of new energy after various AC and DC faults in the vicinity of the hydrogen-electricity coupling system is obtained through simulation calculation, and it is judged whether the transient voltage of new energy after various AC and DC faults in the vicinity of the hydrogen-electricity coupling system is within a reasonable range. If not, the number of phase modifiers is continuously increased until the transient voltage of new energy after various AC and DC faults in the vicinity of the hydrogen-electricity coupling system is within a reasonable range. Then the short-circuit current of the bus in the hydrogen-electricity coupling system and the vicinity of the hydrogen-electricity coupling system is obtained through simulation calculation again, and it is judged whether the short-circuit current of the bus in the hydrogen-electricity coupling system and the vicinity of the hydrogen-electricity coupling system is over-standard. If not, the active configuration of the hydrogen-electricity coupling system is output, and the configuration scheme is output according to the active configuration. If it is over-standard, step 4 is entered.

[0064] Step 4: In the hydrogen-electricity coupling system after adding the phase modifier in step 3, one phase modifier is reduced until the short-circuit current of the bus in the hydrogen-electricity coupling system and the vicinity of the hydrogen-electricity coupling system is not over-standard. After determining the total number of phase modifiers, it is judged whether the transient voltage of new energy after various AC and DC faults in the vicinity of the hydrogen-electricity coupling system is within a reasonable range. If it is within a reasonable range, the active configuration of the hydrogen-electricity coupling system is output, and the configuration scheme is output according to the active configuration. If it is not within a reasonable range, step 5 is performed.

[0065] Step 5: The output of new energy in the hydrogen-electricity coupling system is reduced, the transient voltage of new energy after various AC and DC faults in the vicinity of the hydrogen-electricity coupling system is obtained through simulation calculation, and it is judged whether the transient voltage of new energy after various AC and DC faults in the vicinity of the hydrogen-electricity coupling system is within a reasonable range. If not, the output of new energy in the hydrogen-electricity coupling system is continuously reduced until the transient voltage of new energy after various AC and DC faults in the vicinity of the hydrogen-electricity coupling system is within a reasonable range. The active configuration of the hydrogen-electricity coupling system is output, and the configuration scheme is output according to the active configuration.

[0066] The application will be further described below in combination with specific embodiments:

[0067] The embodiment steps are as shown in Figure 2 , including:

[0068] Step 1: Select specific typical operation mode data. In the mode data, first, the installed capacity of new energy units and the output of new energy units are configured according to the thermal stability limit of the hydrogen-electricity coupling system and the main grid tie line.

[0069] Step 2: The short-circuit current of the bus in the hydrogen-electricity coupling system and the vicinity of the hydrogen-electricity coupling system is simulated and calculated using the mode data. If the short-circuit current of the bus in the hydrogen-electricity coupling system or the vicinity of the hydrogen-electricity coupling system is over-standard, the typical operation mode data is selected again until the short-circuit current of the bus in the hydrogen-electricity coupling system and the vicinity of the hydrogen-electricity coupling system is not over-standard. Then step 3 is performed.

[0070] Step 3: After determining the final mode data, calculate whether the new energy transient voltage after various AC and DC faults in the vicinity of the hydrogen-electricity coupling system is within a reasonable range, i.e., whether the new energy unit has the risk of off-grid. If the new energy transient voltage after the fault is within a reasonable range, it can be considered that the unit capacity and output of the new energy can be configured according to the thermal stability limit of the hydrogen-electricity coupling system and the main grid interconnection line. If the new energy transient voltage after the fault is not within a reasonable range, i.e., the new energy has the risk of off-grid, step 4 is further considered;

[0071] Step 4: One phase modulation machine is added in the hydrogen-electricity coupling system, and then the new energy transient voltage after various AC and DC faults in the vicinity of the hydrogen-electricity coupling system is calculated. If it is not within a reasonable range, the number of phase modulation machines is continuously increased until the new energy transient voltage after the fault is within a reasonable range. After the new energy transient voltage is within a reasonable range, it is calculated whether the short-circuit current of the bus in the hydrogen-electricity coupling system and the vicinity of the hydrogen-electricity coupling system is over-standard. If the short-circuit current is not over-standard, the active power configuration of the hydrogen-electricity coupling system is finally output. If the short-circuit current is over-standard, step 5 is performed;

[0072] Step 5: On the basis of step 4, one phase modulation machine is reduced in the hydrogen-electricity coupling system until the short-circuit current of the bus in the hydrogen-electricity coupling system and the vicinity of the hydrogen-electricity coupling system is not over-standard. At this time, the total number of phase modulation machines is determined, and it is further judged whether the new energy transient voltage after various AC and DC faults in the vicinity of the hydrogen-electricity coupling system is within a reasonable range. If it is within a reasonable range, the active power configuration of the hydrogen-electricity coupling system can be output at this time. If it is not within a reasonable range, step 6 is performed;

[0073] Step 6: The output of the new energy in the hydrogen-electricity coupling system is reduced, and then it is calculated whether the new energy transient voltage after various AC and DC faults in the vicinity of the hydrogen-electricity coupling system is within a reasonable range. If it is not within a reasonable range, the output of the new energy in the hydrogen-electricity coupling system is continuously reduced until the new energy transient voltage after various AC and DC faults in the vicinity of the hydrogen-electricity coupling system is within a reasonable range. The active power configuration of the hydrogen-electricity coupling system is finally output.

[0074] In the PSD power system simulation software tool (PSD Power Tools), small system data is used to establish two examples of scene one and scene two, respectively, as shown in Figure 3 and Figure 4 ;

[0075] Scene one: new energy unit configuration of 330kV hydrogen-electricity coupling system with weak grid structure

[0076] The simulation example data of the new energy external sending infinite system is built, the ± 800 kV UHV DC model of Qingyushi DC model is selected, the DC transmission power is 8000 MW, the sending and receiving end AC power grid is an infinite system, the new energy collection station is connected with the sending end AC system through a 750 kV line, and is connected with the UHV converter station through 3 750 kV lines, Qinggonghe, Qing'erhe, Qingsansan and Qingsihe are conventional new energy stations, and Qingsi is a hydrogen-electricity coupling system station;

[0077] According to the active configuration process, first, the new energy unit installed capacity and output of Qingsihe are configured according to the thermal stability limit of the hydrogen-electricity coupling system and the main grid tie line, wherein the new energy installed capacity is 1500 MW, the arranged output is 1200 MW (80%), and the thermal stability limit of the 330 kV line is equivalent (the thermal stability limit of the single 330 kV AC line is considered as 1200 MW).

[0078] Then the short-circuit current of the 750 kV and 330 kV buses in the near area of Qingsihe station after being connected to the power grid is calculated, the results are shown in Table 1, and the rated breaking current of the 750 kV and 330 kV buses is considered as 63 kA.

[0079] Table 1

[0080]

[0081] According to Table 1, the short-circuit current of the hydrogen-electricity coupling system in the near area meets the requirements, and the system stability and the transient voltage rise at the terminal of the new energy unit after various AC and DC faults are further calculated. The more serious fault is the "3+1" fault of the DC. After the "3+1" fault of the DC occurs, the transient voltage rise at the terminal of the new energy unit in the hydrogen-electricity coupling system reaches 0.319 p.u., and the new energy has the risk of off-grid, as shown in Table 5, and the number of phase modulation machines is 0.

[0082] After 2 phase modulation machines with a capacity of 50 MVar are configured, the transient voltage rise of the new energy unit is controlled within 0.3 p.u., as shown in Table 6. Figure 6

[0083] Further, the short-circuit current of the hydrogen-electricity coupling system and the near area bus after 2 phase modulation machines are configured is checked and calculated, as shown in Table 2, and it can be seen that the short-circuit current of the bus does not exceed the rated breaking current.

[0084] Table 2

[0085]

[0086] ​From the above analysis, the hydrogen-electric coupling system configuration: new energy installed capacity of 1500MW according to its 80% output 1200MW, hydrogen load according to 1200MW, 330kV AC line thermal stability limit according to 1200MW, in order to prevent new energy from off-grid risk, configure 2 sets of 50MVar phase modifier, bus short circuit current does not exceed its rated breaking current, the active configuration of this hydrogen-electric coupling system meets the requirements.

[0087] Scenario two: 750kV hydrogen-electric coupling system new energy unit configuration of weak access network structure

[0088] Build new energy external sending infinite system simulation example data, UHVDC model selects Qingyushi DC model, DC voltage is ±800kV, DC transmission power is 8000MW, sending and receiving end AC power grid uses infinite system, new energy collection station is connected with sending end AC system through 3 return 750kV line and connected with UHV converter station through 3 return 750kV line, Qingyihe, Qing'erhe and Qingsihe are hydrogen-electric coupling system field stations;

[0089] According to the active configuration process, first of all, according to the thermal stability limit of hydrogen-electric coupling system and main grid interconnection line, configure Qingsihe new energy unit capacity and output condition, among which new energy installed capacity is 1500MW, arranged output is 1200MW(80%) and 330kV line thermal stability limit is equivalent. Qingyihe, Qing'erhe and Qingsihe are configured the same.

[0090] Then calculate the short circuit current of 750kV and 330kV bus in the vicinity of Qingyihe, Qing'erhe and Qingsihe field stations after connecting to the power grid, the results are shown in Table 3.

[0091] Table 3

[0092]

[0093] The short circuit current of the hydrogen-electric coupling system in the vicinity meets the requirements, further calculate the system stability and new energy unit terminal transient voltage rise after various AC and DC faults.

[0094] The transient voltage rise of new energy unit terminal in hydrogen-electric coupling system after "3+1" fault of DC reaches 0.117p.u., which meets the requirement that transient voltage rise is within 0.3p.u. after fault. The specific is shown in Table 4. Figure 7

[0095] ​From the above analysis, the hydrogen-electricity coupling system configuration: new energy installed capacity of 1500MW according to its 80% output 1200MW, hydrogen load according to 1200MW, 330kV AC line thermal stability limit according to 1200MW, new energy has no risk of off-grid, bus short-circuit current does not exceed its rated breaking current. Three identical hydrogen-electricity coupling systems are configured in the collection station, and the active configuration of the collection station and the hydrogen-electricity coupling system meets the requirements.

[0096] Embodiment 2:

[0097] The application also provides a system 200 for active device configuration of a hydrogen-electricity coupling system, as shown in Figure 8 , comprising:

[0098] An initial unit 201 is configured to determine the limiting factor of the hydrogen-electricity coupling system for active device configuration;

[0099] A data selection unit 202 is configured to select specific typical operating mode data of the hydrogen-electricity coupling system, and based on the limiting factor, configure the new energy unit capacity and new energy unit output under the specific typical operating mode data;

[0100] A simulation calculation unit 203 is configured to, based on the limiting factor, perform simulation calculation on the hydrogen-electricity coupling system with configured new energy unit capacity and new energy unit output under the specific typical operating mode data, judge the simulation result, and output a configuration scheme according to the judgment result;

[0101] A configuration unit 204 is configured to perform active device configuration on the hydrogen-electricity coupling system according to the configuration scheme.

[0102] The limiting factor includes the thermal stability limit of the AC line, the short-circuit current level of the bus, and the new energy high-voltage off-grid risk.

[0103] The simulation result includes:

[0104] The simulation calculation result of the short-circuit current of the bus in the hydrogen-electricity coupling system and the bus in the near area of the hydrogen-electricity coupling system;

[0105] The simulation calculation result of the transient voltage of the new energy after various AC and DC faults in the near area of the hydrogen-electricity coupling system.

[0106] The simulation calculation unit 203 is configured to, based on the limiting factor, perform simulation calculation on the hydrogen-electricity coupling system with configured new energy unit capacity and new energy unit output under the specific typical operating mode data, judge the simulation result, and output a configuration scheme according to the judgment result, including:

[0107] Step 1: using the specific typical operating mode data, simulating the short-circuit current of the bus in the hydrogen-electricity coupling system and the bus in the vicinity of the hydrogen-electricity coupling system, and determining whether the short-circuit current of the bus in the hydrogen-electricity coupling system and the bus in the vicinity of the hydrogen-electricity coupling system is over-standard, if it is over-standard, then reselecting the specific typical operating mode data until the short-circuit current of the bus in the hydrogen-electricity coupling system and the bus in the vicinity of the hydrogen-electricity coupling system is not over-standard, entering step 2;

[0108] Step 2: determining the reselected specific typical operating mode data as the final mode data, using the final mode data, simulating the new energy transient voltage after various AC and DC faults in the vicinity of the hydrogen-electricity coupling system, and determining whether the new energy transient voltage after various AC and DC faults in the vicinity of the hydrogen-electricity coupling system is within a reasonable range, if it is within a reasonable range, then determining the unit capacity and output of the new energy, configuring according to the thermal stability limit of the hydrogen-electricity coupling system and the main grid tie line, if it is not within a reasonable range, then entering step 3;

[0109] Step 3: after adding 1 phase-modulating machine in the hydrogen-electricity coupling system, simulating the new energy transient voltage after various AC and DC faults in the vicinity of the hydrogen-electricity coupling system, and determining whether the new energy transient voltage after various AC and DC faults in the vicinity of the hydrogen-electricity coupling system is within a reasonable range, if it is not, continue to increase the number of phase-modulating machines until the new energy transient voltage after various AC and DC faults in the vicinity of the hydrogen-electricity coupling system is within a reasonable range, and re-simulate the short-circuit current of the bus in the hydrogen-electricity coupling system and the bus in the vicinity of the hydrogen-electricity coupling system, and determine whether the short-circuit current of the bus in the hydrogen-electricity coupling system and the bus in the vicinity of the hydrogen-electricity coupling system is over-standard, if it is not over-standard, then outputting the active configuration of the hydrogen-electricity coupling system, and outputting the configuration scheme according to the active configuration, if it is over-standard, then entering step 4;

[0110] Step 4: reducing 1 phase-modulating machine in the hydrogen-electricity coupling system after adding the phase-modulating machine in step 3 until the short-circuit current of the bus in the hydrogen-electricity coupling system and the bus in the vicinity of the hydrogen-electricity coupling system is not over-standard, determining the total number of phase-modulating machines, and determining whether the new energy transient voltage after various AC and DC faults in the vicinity of the hydrogen-electricity coupling system is within a reasonable range, if it is within a reasonable range, then outputting the active configuration of the hydrogen-electricity coupling system, and outputting the configuration scheme according to the active configuration, if it is not within a reasonable range, then performing step 5;

[0111] Step 5: reduce the new energy output in the hydrogen-electricity coupling system, simulate to obtain the new energy transient voltage after various AC and DC faults in the vicinity of the hydrogen-electricity coupling system, and determine whether the new energy transient voltage after various AC and DC faults in the vicinity of the hydrogen-electricity coupling system is within a reasonable range, if not, continue to reduce the new energy output in the hydrogen-electricity coupling system until the new energy transient voltage after various AC and DC faults in the vicinity of the hydrogen-electricity coupling system is within a reasonable range, output the active configuration of the hydrogen-electricity coupling system, and output the configuration scheme according to the active configuration.

[0112] The application can reasonably configure the hydrogen-electricity coupling system, and ensure that the hydrogen-electricity coupling system does not have operation risks after being connected to a power grid.

[0113] Embodiment 3:

[0114] Based on the same inventive concept, the application further provides a computer device, which comprises a processor and a memory, the memory is used for storing a computer program, the computer program comprises program instructions, and the processor is used for executing the program instructions stored in the computer storage medium. The processor can be a central processing unit (CPU), and can also be other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components and the like, which are the computing core and control core of the terminal, are suitable for implementing one or more instructions, and are specifically suitable for loading and executing one or more instructions in the computer storage medium to implement a corresponding method flow or a corresponding function, so as to implement the steps of the method in the above embodiments.

[0115] Embodiment 4:

[0116] Based on the same inventive concept, the present application also provides a storage medium, specifically a computer readable storage medium (Memory), which is a memory device in a computer device, used for storing programs and data. It can be understood that the computer readable storage medium herein can include an internal storage medium in the computer device, and of course can also include an extended storage medium supported by the computer device. The computer readable storage medium provides a storage space, which stores an operating system of the terminal. In addition, one or more instructions suitable for being loaded and executed by the processor are also stored in the storage space, and the instructions can be one or more computer programs (including program codes). It should be noted that the computer readable storage medium herein can be a high-speed RAM memory, or a non-volatile memory such as at least one disk memory. One or more instructions stored in the computer readable storage medium can be loaded and executed by the processor to realize the steps of the method in the above embodiments.

[0117] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, a system, or a computer program product. Therefore, the present application can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can take the form of a computer program product implemented on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROMs, optical storage, etc.) containing computer-usable program code. The solutions in the embodiments of the present application can be implemented in various computer languages, such as the object-oriented programming language Java and the interpreted scripting language JavaScript.

[0118] The present application is described with reference to flowcharts and / or block diagrams of the method, device (system), and computer program product according to the embodiments of the present application. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, and the combination of the flows and / or blocks in the flowcharts and / or block diagrams can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device produce a device that implements the functions specified in the flowcharts and / or block diagrams. Figure 1 The functions specified in one or more flows and / or blocks Figure 1 The device that implements the functions specified in one or more flows and / or blocks.

[0119] These computer program instructions can also be stored in a computer- readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instructions which implement the Figure 1 function specified in the flow or flows and / or blocks Figure 1 of the block or blocks.

[0120] The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions that are executed on the computer or other programmable apparatus provide steps for implementing the Figure 1 function specified in the flow or flows and / or blocks Figure 1 of the block or blocks.

[0121] While the preferred embodiments of the application have been described, additional variations and modifications can be made to the embodiments by those skilled in the art once they learn of the basic inventive concepts. Therefore, the appended claims are intended to cover all such additional variations and modifications as fall within the scope of the present application. What is claimed is:

[0122] Obviously, numerous modifications and variations of the present application are possible in light of the above teachings. It is therefore to be understood that within the scope of the appended claims and their equivalents, the application can be practiced otherwise than as specifically described.

Claims

1. A method for configuring active power devices in a hydrogen-electric coupling system, characterized in that, include: Determine the limiting factors for configuring active power units in hydrogen-electric coupling systems; Select specific typical operating mode data of the hydrogen-electric coupling system, and under the specific typical operating mode data, configure the new energy unit's installed capacity and output based on the limiting factors; Under the specific typical operating mode data, based on limiting factors, a simulation calculation is performed on the hydrogen-electric coupling system with configured new energy unit capacity and output. The simulation results are evaluated, and based on the evaluation results, a configuration scheme is output, including: Step 1: Using the specific typical operating mode data, simulate and calculate the short-circuit current of the bus in the hydrogen-electric coupling system and the bus in the near-field area of ​​the hydrogen-electric coupling system, and determine whether the short-circuit current of the bus in the hydrogen-electric coupling system and the bus in the near-field area of ​​the hydrogen-electric coupling system exceeds the standard. If it exceeds the standard, select the specific typical operating mode data again until the short-circuit current of the bus in the hydrogen-electric coupling system and the bus in the near-field area of ​​the hydrogen-electric coupling system does not exceed the standard, and then proceed to Step 2. Step 2: Determine the specific typical operating mode data to be reselected as the final mode data. Using the final mode data, simulate and calculate the transient voltage of the new energy source after various AC / DC faults in the near-field of the hydrogen-electric coupling system, and determine whether the transient voltage of the new energy source after various AC / DC faults in the near-field of the hydrogen-electric coupling system is within a reasonable range. If it is within a reasonable range, determine the installed capacity and output of the new energy source according to the thermal stability limit of the connection line between the hydrogen-electric coupling system and the main grid. If it is not within a reasonable range, proceed to Step 3. Step 3: After adding one synchronous condenser to the hydrogen-electric coupling system, simulate and calculate the transient voltage of the new energy source after various AC / DC faults in the near area of ​​the hydrogen-electric coupling system, and determine whether the transient voltage of the new energy source after various AC / DC faults in the near area of ​​the hydrogen-electric coupling system is within a reasonable range. If not, continue to increase the number of synchronous condensers until the transient voltage of the new energy source after various AC / DC faults in the near area of ​​the hydrogen-electric coupling system is within a reasonable range. Then, re-simulate and calculate the short-circuit current of the hydrogen-electric coupling system and the bus in the near area of ​​the hydrogen-electric coupling system, and determine whether the short-circuit current of the hydrogen-electric coupling system and the bus in the near area of ​​the hydrogen-electric coupling system exceeds the standard. If it does not exceed the standard, output the active power configuration of the hydrogen-electric coupling system, and output the configuration scheme according to the active power configuration. If it exceeds the standard, proceed to Step 4. Step 4: In the hydrogen-electric coupling system after adding a synchronous condenser in Step 3, reduce one synchronous condenser until the short-circuit current of the hydrogen-electric coupling system and the bus in the near-zone of the hydrogen-electric coupling system does not exceed the standard. After determining the total number of synchronous condensers, determine whether the transient voltage of the new energy source after various AC and DC faults in the near-zone of the hydrogen-electric coupling system is within a reasonable range. If it is within a reasonable range, output the active power configuration of the hydrogen-electric coupling system and output the configuration scheme according to the active power configuration. If it is not within a reasonable range, proceed to Step 5. Step 5: Reduce the output of new energy sources in the hydrogen-electric coupling system. Simulate and calculate the transient voltage of new energy sources after various AC / DC faults in the near-field of the hydrogen-electric coupling system. Determine whether the transient voltage of new energy sources after various AC / DC faults in the near-field of the hydrogen-electric coupling system is within a reasonable range. If not, continue to reduce the output of new energy sources in the hydrogen-electric coupling system until the transient voltage of new energy sources after various AC / DC faults in the near-field of the hydrogen-electric coupling system is within a reasonable range. Output the active power configuration of the hydrogen-electric coupling system and output the configuration scheme based on the active power configuration. The active power unit of the hydrogen-electric coupling system is configured according to the aforementioned configuration scheme.

2. The method according to claim 1, characterized in that, The limiting factors include: the thermal stability limit of AC lines, the short-circuit current level of busbars, and the risk of high-voltage disconnection from new energy sources.

3. A system for configuring active power devices in a hydrogen-electric coupling system, characterized in that, include: The initial unit is used to determine the limiting factors for configuring the active power unit in the hydrogen-electric coupling system; The data selection unit is used to select specific typical operating mode data of the hydrogen-electric coupling system, and under the specific typical operating mode data, configure the new energy unit's installed capacity and output based on the limiting factors; The simulation calculation unit is used to perform simulation calculations on the hydrogen-electric coupling system with configured new energy unit capacity and output under the specific typical operating mode data, based on limiting factors. It then evaluates the simulation results and outputs a configuration scheme based on the evaluation results, including: Step 1: Using the specific typical operating mode data, simulate and calculate the short-circuit current of the bus in the hydrogen-electric coupling system and the bus in the near-field area of ​​the hydrogen-electric coupling system, and determine whether the short-circuit current of the bus in the hydrogen-electric coupling system and the bus in the near-field area of ​​the hydrogen-electric coupling system exceeds the standard. If it exceeds the standard, select the specific typical operating mode data again until the short-circuit current of the bus in the hydrogen-electric coupling system and the bus in the near-field area of ​​the hydrogen-electric coupling system does not exceed the standard, and then proceed to Step 2. Step 2: Determine the specific typical operating mode data to be reselected as the final mode data. Using the final mode data, simulate and calculate the transient voltage of the new energy source after various AC / DC faults in the near-field of the hydrogen-electric coupling system, and determine whether the transient voltage of the new energy source after various AC / DC faults in the near-field of the hydrogen-electric coupling system is within a reasonable range. If it is within a reasonable range, determine the installed capacity and output of the new energy source according to the thermal stability limit of the connection line between the hydrogen-electric coupling system and the main grid. If it is not within a reasonable range, proceed to Step 3. Step 3: After adding one synchronous condenser to the hydrogen-electric coupling system, simulate and calculate the transient voltage of the new energy source after various AC / DC faults in the near area of ​​the hydrogen-electric coupling system, and determine whether the transient voltage of the new energy source after various AC / DC faults in the near area of ​​the hydrogen-electric coupling system is within a reasonable range. If not, continue to increase the number of synchronous condensers until the transient voltage of the new energy source after various AC / DC faults in the near area of ​​the hydrogen-electric coupling system is within a reasonable range. Then, re-simulate and calculate the short-circuit current of the hydrogen-electric coupling system and the bus in the near area of ​​the hydrogen-electric coupling system, and determine whether the short-circuit current of the hydrogen-electric coupling system and the bus in the near area of ​​the hydrogen-electric coupling system exceeds the standard. If it does not exceed the standard, output the active power configuration of the hydrogen-electric coupling system, and output the configuration scheme according to the active power configuration. If it exceeds the standard, proceed to Step 4. Step 4: In the hydrogen-electric coupling system after adding a synchronous condenser in Step 3, reduce one synchronous condenser until the short-circuit current of the hydrogen-electric coupling system and the bus in the near-zone of the hydrogen-electric coupling system does not exceed the standard. After determining the total number of synchronous condensers, determine whether the transient voltage of the new energy source after various AC and DC faults in the near-zone of the hydrogen-electric coupling system is within a reasonable range. If it is within a reasonable range, output the active power configuration of the hydrogen-electric coupling system and output the configuration scheme according to the active power configuration. If it is not within a reasonable range, proceed to Step 5. Step 5: Reduce the output of new energy sources in the hydrogen-electric coupling system. Simulate and calculate the transient voltage of new energy sources after various AC / DC faults in the near-field of the hydrogen-electric coupling system. Determine whether the transient voltage of new energy sources after various AC / DC faults in the near-field of the hydrogen-electric coupling system is within a reasonable range. If not, continue to reduce the output of new energy sources in the hydrogen-electric coupling system until the transient voltage of new energy sources after various AC / DC faults in the near-field of the hydrogen-electric coupling system is within a reasonable range. Output the active power configuration of the hydrogen-electric coupling system and output the configuration scheme based on the active power configuration. A configuration unit is used to configure the active power device of the hydrogen-electric coupling system according to the configuration scheme.

4. The system according to claim 3, characterized in that, The limiting factors include: the thermal stability limit of AC lines, the short-circuit current level of busbars, and the risk of high-voltage disconnection from new energy sources.

5. A computer device, characterized in that, include: One or more processors; A processor is used to execute one or more programs; When the one or more programs are executed by the one or more processors, the method described in any one of claims 1-2 is implemented.

6. A computer-readable storage medium, characterized in that, It contains a computer program, which, when executed, implements the method as described in any one of claims 1-2.

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