Insulation abnormity protection device, new energy hydrogen production system and hydrogen production equipment

Abstract

The utility model discloses an insulation abnormity protection device, a new energy hydrogen production system and hydrogen production equipment, and relates to the technical field of water electrolysis hydrogen production, the insulation abnormity protection device comprises an insulation resistance detection module used for being connected with a direct current bus of the new energy hydrogen production system and used for detecting the insulation resistance value of the direct current bus to the ground; the leakage current detection module is respectively connected with a direct current bus of the new energy hydrogen production system and the energy storage module and is used for detecting a leakage current value output by the energy storage module; the control module is respectively connected with the insulation resistance detection module and the leakage current detection module, and is respectively connected with an energy storage module and a hydrogen production module of the new energy hydrogen production system; and under the condition that the leakage current value detected by the leakage current detection module is larger than a preset current threshold value, insulation abnormity protection on the new energy hydrogen production system is started.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrogen production by electrolysis of water, and in particular to an insulation abnormality protection device, a new energy hydrogen production system and hydrogen production equipment. Background Art

[0002] The new energy hydrogen production system is a system that uses new energy (such as solar energy, wind energy, etc.) and combines new energy power generation technology with water electrolysis hydrogen production technology to produce hydrogen.

[0003] At present, in order to ensure the stable operation of the new energy hydrogen production system, an energy storage module is usually configured in the new energy hydrogen production system. However, in actual applications, the new energy hydrogen production system configured with the energy storage module is prone to insulation abnormalities. Once this happens, it will pose a threat to the safe operation of the new energy hydrogen production system. Utility Model Content

[0004] The main purpose of the utility model is to provide an insulation abnormality protection device, aiming to avoid the influence of insulation abnormality on the operational safety of a new energy hydrogen production system, so as to improve the safety of the new energy hydrogen production system.

[0005] In order to achieve the above object, the utility model proposes an insulation abnormality protection device, comprising:

[0006] An insulation resistance detection module, which is used to connect the DC bus of the new energy hydrogen production system and detect the insulation resistance value of the DC bus to the ground;

[0007] A leakage current detection module, which is used to connect the DC bus and the energy storage module of the new energy hydrogen production system respectively, and is used to detect the leakage current value output by the energy storage module;

[0008] A control module, wherein the control module is respectively connected to the insulation resistance detection module and the leakage current detection module, and the control module is used to respectively connect to the energy storage module and the hydrogen production module of the new energy hydrogen production system, and is used to enable insulation abnormality protection for the new energy hydrogen production system when the insulation resistance value detected by the insulation resistance detection module is less than a preset resistance threshold, and / or the leakage current value detected by the leakage current detection module is greater than a preset current threshold.

[0009] In one embodiment, the insulation resistance detection module is a resistance detector.

[0010] In one embodiment, the leakage current detection module is a current sensor.

[0011] In one embodiment, the control module includes:

[0012] a first comparator, wherein the positive input end of the first comparator is connected to the insulation resistance detection module, the negative input end of the first comparator is connected to the preset resistance threshold, and the output end of the first comparator is used to connect the hydrogen production module and the energy storage module respectively, and is used to compare the insulation resistance value detected by the insulation resistance detection module with the preset resistance threshold, and when it is determined that the insulation resistance value is less than the preset resistance threshold, enable insulation abnormality protection for the new energy hydrogen production system;

[0013] A second comparator, wherein the positive input terminal of the second comparator is connected to the preset current threshold, the negative input terminal of the second comparator is connected to the leakage current detection module, and the output terminal of the second comparator is used to connect the hydrogen production module and the energy storage module respectively, and is used to compare the leakage current value detected by the leakage current detection module with the preset current threshold, and when it is determined that the leakage current value is greater than the preset current threshold, enable insulation abnormality protection for the new energy hydrogen production system.

[0014] In addition, to achieve the above purpose, the utility model also provides a new energy hydrogen production system, wherein the motor drive system includes a power generation module, a DC bus, a hydrogen production module, an energy storage module and the above insulation abnormality protection device;

[0015] The DC bus is respectively connected to the power generation module, the hydrogen production module, the leakage current detection module and the insulation resistance detection module of the insulation abnormality protection device; the energy storage module is connected to the leakage current detection module; the control module of the insulation abnormality protection device is respectively connected to the hydrogen production module, the energy storage module, the insulation resistance detection module and the leakage current detection module; the hydrogen production module and the energy storage module are grounded.

[0016] In one embodiment, the power generation module includes a power generation unit of at least one energy type, and the energy type is wind energy or solar energy.

[0017] In one embodiment, the hydrogen production module includes a first DC converter and an electrolyzer;

[0018] The first end of the first DC converter is connected to the control module, the second end of the first DC converter is connected to the DC bus, the third end of the first DC converter is connected to one end of the electrolytic cell, and the other end of the electrolytic cell is grounded.

[0019] In one embodiment, the energy storage module includes a second DC converter and an energy storage battery;

[0020] A first end of the second DC converter is connected to the control module, a second end of the second DC converter is connected to the leakage current detection module, a third end of the second DC converter is connected to one end of the energy storage battery, and the other end of the energy storage battery is grounded.

[0021] In one embodiment, the topological structures of the first DC converter included in the hydrogen production module and the second DC converter included in the energy storage module are both non-isolated topological structures.

[0022] In addition, to achieve the above-mentioned purpose, the utility model also provides a hydrogen production equipment, and the hydrogen production equipment includes the above-mentioned new energy hydrogen production system.

[0023] The utility model provides an insulation abnormality protection device, which includes an insulation resistance detection module connected to a DC bus of a new energy hydrogen production system, and is used to detect the insulation resistance value of the DC bus to the ground; a leakage current detection module connected to the DC bus and an energy storage module of the new energy hydrogen production system, and is used to detect the leakage current value output by the energy storage module; a control module connected to the insulation resistance detection module and the leakage current detection module, and connected to the energy storage module and the hydrogen production module of the new energy hydrogen production system, and is used to enable insulation abnormality protection for the new energy hydrogen production system when the insulation resistance value detected by the insulation resistance detection module is less than a preset resistance threshold, and / or the leakage current value detected by the leakage current detection module is greater than a preset current threshold.

[0024] Therefore, the utility model sets an insulation abnormality detection module and a leakage current detection module to respectively detect the insulation resistance value of the DC bus to the ground and the leakage current value output by the energy storage module. Since the insulation resistance value of the DC bus to the ground and the leakage current value output by the energy storage module can accurately reflect whether the energy storage module and the DC bus have insulation damage to the ground, the detected insulation resistance value and leakage current value can accurately determine whether there is an insulation abnormality in the new energy hydrogen production system. Furthermore, the utility model also sets a control module to enable insulation abnormality protection for the new energy hydrogen production system when the detected insulation resistance value is less than the preset resistance threshold, and / or the detected leakage current value is greater than the preset current threshold, that is, when there is insulation abnormality in the new energy hydrogen production system, so as to timely avoid the influence of insulation abnormality on the operation safety of the new energy hydrogen production system, thereby improving the safety of the new energy hydrogen production system. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0026] Figure 1 A schematic diagram of insulation damage to the ground in an energy storage module provided in an embodiment of the utility model;

[0027] Figure 2 This is a schematic structural diagram of the first embodiment of the insulation abnormality protection device of the utility model;

[0028] Figure 3 This is a schematic structural diagram of the fifth embodiment of the utility model new energy hydrogen production system;

[0029] Figure 4 This is a structural schematic diagram of the utility model in which the hydrogen production module in the new energy hydrogen production system includes a first DC converter and an electrolyzer, and the energy storage module includes a second DC converter and an energy storage battery.

[0030] The purpose, features and advantages of the present invention will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

[0031] Description of Figure Numbers:

[0032] 10. Insulation resistance detection module; 20. Leakage current detection module; 30. Control module; 100. Hydrogen production module; 200. Energy storage module; 300. Power generation module; 101. First DC converter; 102. Electrolyzer; 201. Second DC converter; 202. Energy storage battery. DETAILED DESCRIPTION

[0033] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0034] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0035] It should be noted that the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0036] The new energy hydrogen production system is a system that uses new energy (such as solar energy, wind energy, etc.) and combines new energy power generation technology with water electrolysis hydrogen production technology to produce hydrogen.

[0037] At present, in order to ensure the stable operation of the new energy hydrogen production system, an energy storage module is usually configured in the new energy hydrogen production system. However, in actual applications, the new energy hydrogen production system configured with the energy storage module is prone to insulation abnormalities. Once this happens, it will pose a threat to the safe operation of the new energy hydrogen production system.

[0038] Through research, it was found that the reason why the new energy hydrogen production system equipped with energy storage modules has insulation abnormalities is that the energy storage module and / or DC bus in the new energy hydrogen production system has insulation damage to the ground. Specifically, since the gas outlet of the electrolyzer in the hydrogen production module of the new energy hydrogen production system is usually connected to external equipment by a stainless steel pipe, and the external equipment is usually directly grounded, this will cause the electrolyzer to be directly grounded. In this case, if the energy storage module has insulation damage to the ground, when the energy storage module and the hydrogen production module are working at the same time, the new energy hydrogen production system will be damaged through Figure 1 The dotted line shown forms a leakage current. If the value of the leakage current exceeds a certain value, the energy storage battery in the energy storage module will leak or decay, and in severe cases it may even cause an internal short circuit, thereby posing a threat to the safe operation of the new energy hydrogen production system.

[0039] Based on this, the utility model provides an insulation abnormality protection device. In the first embodiment of the utility model, please refer to Figure 2The insulation abnormality protection device includes an insulation resistance detection module 10, a leakage current detection module 20 and a control module 30; the detection end of the insulation current detection module 10 is used to connect the DC bus of the new energy hydrogen production system, the first end of the leakage current detection module 20 is used to connect the DC bus, the second end of the leakage current detection module 20 is used to connect the first end of the energy storage module 200 of the new energy hydrogen production system, and the control module 30 is respectively connected to the control end of the insulation resistance detection module 10, the third end of the leakage current detection module 20, and the first end of the hydrogen production module 100 and the second end of the energy storage module 200 of the new energy hydrogen production system; the insulation resistance detection module 10 is used to detect the insulation resistance value of the DC bus to the ground; the leakage current detection module 20 is used to detect the leakage current value output by the energy storage module 200; the control module 30 is used to enable the insulation abnormality protection of the new energy hydrogen production system when the insulation resistance value detected by the insulation resistance detection module 10 is less than the preset resistance threshold, and the leakage current value detected by the leakage current detection module 20 is greater than the preset current threshold.

[0040] It should be noted that the insulation resistance detection module 10 can be a resistance detector, a resistance detection circuit, a resistance sensor or other devices capable of detecting resistance values, etc., and the present embodiment does not specifically limit the structural composition of the insulation resistance detection module 10. The leakage current detection module 20 can be a current sensor, a current detection circuit or other devices capable of detecting current values, etc., and the present embodiment does not specifically limit the structural composition of the leakage current detection module 20. The control module 30 can be a controller, a control chip, a register, etc. that integrates the current comparison function, the resistance comparison function and the function of stopping the hydrogen production module 100 and the energy storage module 200, or it can be an integrated circuit capable of realizing the current comparison function, the resistance comparison function and the function of stopping the hydrogen production module 100 and the energy storage module 200, etc., and the present embodiment does not specifically limit the structural composition of the control module 30. The preset resistance threshold and the preset current threshold can be obtained through experimental testing.

[0041] In addition, it should be noted that the process of enabling the insulation abnormality protection of the new energy hydrogen production system by the control module 30 is essentially achieved by the control module 30 stopping the operation of the energy storage module 200 or stopping the operation of the hydrogen production module 100 and the energy storage module 200 or directly disabling the startup function of the new energy hydrogen production system. In general, when enabling the insulation abnormality protection of the new energy hydrogen production system, it can be divided into the following situations:

[0042] When the hydrogen production module 100 is not in working state and the energy storage module 200 is in working state, the control module 30 can enable the insulation abnormality protection of the new energy hydrogen production system by stopping the energy storage module 200. It can be understood that when the hydrogen production module 100 is not working and the energy storage module 200 is working, if an insulation abnormality is detected in the new energy hydrogen production system, by stopping the energy storage module 200, the fault impact of the insulation abnormality can be effectively avoided from continuing to expand in the new energy hydrogen production system, thereby avoiding the impact of the insulation abnormality on the operational safety of the new energy hydrogen production system and improving the safety of the new energy hydrogen production system.

[0043] When the hydrogen production module 100 and the energy storage module 200 are both in working state, the control module 30 can realize the activation of the insulation abnormality protection of the new energy hydrogen production system by stopping the energy storage module 200, or by stopping the hydrogen production module 100 and the energy storage module 200 at the same time; wherein, in this case, compared with only stopping the energy storage module 200, stopping the hydrogen production module 100 and the energy storage module 200 at the same time can provide greater convenience for maintenance personnel, so that maintenance personnel can perform subsequent maintenance and overhaul work on the new energy system. It can be understood that when the hydrogen production module 100 and the energy storage module 200 are working at the same time, if an insulation abnormality is detected in the new energy hydrogen production system, by stopping the energy storage module 200 or stopping the hydrogen production module 100 and the energy storage module 200 at the same time, the fault influence of the insulation abnormality can be effectively avoided from continuing to expand in the new energy hydrogen production system, so as to avoid the influence of the insulation abnormality on the operation safety of the new energy hydrogen production system and improve the safety of the new energy hydrogen production system.

[0044] When the hydrogen production module 100 and the energy storage module 200 are not in working state, the control module 30 can enable the insulation abnormality protection of the new energy hydrogen production system by disabling the power-on function of the new energy hydrogen production system. It is understandable that if the insulation abnormality of the new energy hydrogen production system is detected when the hydrogen production module 100 and the energy storage module 200 are not working, the power-on function of the new energy hydrogen production system can be directly disabled to prevent the new energy hydrogen production system from starting, thereby avoiding the influence of the insulation abnormality on the operational safety of the new energy hydrogen production system and improving the safety of the new energy hydrogen production system.

[0045] In a feasible implementation, the control module 30 may include a first comparator and a second comparator, the positive input end of the first comparator is connected to the control end of the insulation resistance detection module 10, that is, the insulation resistance value detected by the insulation resistance detection module 10 is connected, the negative input end of the first comparator is connected to the preset resistance threshold, and the output end of the first comparator is used to connect the first end of the hydrogen production module 100 and the second end of the energy storage module 200 respectively. Thus, if the insulation resistance value is less than the preset resistance threshold, the first comparator will output a low-level signal to the hydrogen production module 100 and the energy storage module 200, thereby, the hydrogen production module 100 and the energy storage module 200 cannot be enabled and will stop working; the positive input end of the second comparator is connected to the preset current threshold, the negative input end of the second comparator is connected to the third end of the leakage current detection module 20, that is, the leakage current value detected by the leakage current detection module 20 is connected, and the output end of the second comparator is used to connect the first end of the hydrogen production module 100 and the second end of the energy storage module 200 respectively. Therefore, if the leakage current value is greater than the preset current threshold, the second comparator will output a low level signal to the hydrogen production module 100 and the energy storage module 200, thereby the hydrogen production module 100 and the energy storage module 200 cannot be enabled and will stop working.

[0046] In this embodiment, the insulation abnormality detection module 10 and the leakage current detection module 20 are set to respectively detect the insulation resistance value of the DC bus to the ground and the leakage current value output by the energy storage module 200. Since the insulation resistance value of the DC bus to the ground and the leakage current value output by the energy storage module 200 can accurately reflect whether the energy storage module 200 and the DC bus have insulation damage to the ground, the insulation resistance value and the leakage current value detected can accurately determine whether there is an insulation abnormality in the new energy hydrogen production system. Further, in this embodiment, the control module 30 is set to enable the insulation abnormality protection of the new energy hydrogen production system when the detected insulation resistance value is less than the preset resistance threshold and the detected leakage current value is greater than the preset current threshold, that is, when there is an insulation abnormality in the new energy hydrogen production system, so as to timely avoid the influence of the insulation abnormality on the operation safety of the new energy hydrogen production system, thereby improving the safety of the new energy hydrogen production system.

[0047] Based on the above-mentioned first embodiment, a second embodiment of the insulation abnormality protection device of the utility model is proposed. In the second embodiment of the utility model, the control module 30 is also used to enable insulation abnormality protection for the new energy hydrogen production system when the insulation resistance value detected by the insulation resistance detection module 10 is less than a preset resistance threshold.

[0048] It is understandable that, through research, it is found that if the energy storage module 200 or the DC bus has insulation damage to the ground, the insulation resistance value of the DC bus to the ground will be too small. Therefore, it is possible to determine whether the new energy hydrogen production system has insulation abnormality by only detecting whether the insulation resistance value of the DC bus to the ground is less than the preset resistance threshold.

[0049] In this embodiment, the control module 30 is set to enable insulation abnormality protection for the new energy hydrogen production system when the insulation resistance value detected by the insulation resistance detection module 10 is less than a preset resistance threshold, that is, when there is an insulation abnormality in the new energy hydrogen production system, so as to timely avoid the influence of the insulation abnormality on the operational safety of the new energy hydrogen production system, thereby improving the safety of the new energy hydrogen production system.

[0050] Based on the above-mentioned first embodiment, a third embodiment of the insulation abnormality protection device of the utility model is proposed. In the third embodiment of the utility model, the control module 30 is also used to enable insulation abnormality protection for the new energy hydrogen production system when the leakage current value detected by the leakage current detection module 20 is greater than the preset current threshold.

[0051] It is understandable that, in the case where the insulation to the ground of the energy storage module 200 is damaged, if the hydrogen production module 100 and the energy storage module 200 work at the same time, leakage current will be generated in the new energy hydrogen production system. Therefore, it is possible to determine whether there is an insulation abnormality in the new energy hydrogen production system by only detecting whether the leakage current value output by the energy storage module 200 is greater than the preset current threshold.

[0052] In this embodiment, the control module 30 is set to enable insulation abnormality protection for the new energy hydrogen production system when the leakage current value detected by the leakage current detection module 20 is greater than a preset current threshold, that is, when there is insulation abnormality in the new energy hydrogen production system, so as to timely avoid the influence of the insulation abnormality on the operational safety of the new energy hydrogen production system, thereby improving the safety of the new energy hydrogen production system.

[0053] Based on the above-mentioned first embodiment, second embodiment and / or third embodiment, a fourth embodiment of the insulation abnormality protection device of the utility model is proposed. In the fourth embodiment of the utility model, the control module 30 can control the insulation resistance detection module 10 and the leakage current detection module 20 to work separately according to different situations, that is, limit the working scenes of the insulation resistance detection module 10 and the leakage current detection module 20. Specifically:

[0054] When the hydrogen production module 100 is not in working state, the control module 30 controls the insulation resistance detection module 10 to start working; when the hydrogen production module 100 and the energy storage module 200 are both in working state, the control module 30 controls the leakage current detection module 20 to start working.

[0055] It is understandable that, since the hydrogen production module 100 is not working, no leakage current will be generated in the new energy hydrogen production system regardless of whether the energy storage module 200 is working, that is, the leakage current value output by the energy storage module 200 is zero. At this time, if the new energy hydrogen production system has an insulation abnormality, the insulation resistance value of the DC bus to the ground will be too small. Therefore, the control module 30 can only control the insulation resistance detection module 10 to start working, without controlling the leakage current detection module 20 to work, so as to accurately determine whether there is an insulation abnormality in the new energy hydrogen production system; and when the hydrogen production module 100 and the energy storage module 200 are working at the same time, since the hydrogen production module 100 is equivalent to direct grounding, the insulation resistance of the DC bus to the ground at this time is likely to be unable to correctly reflect whether there is an insulation abnormality in the new energy hydrogen production system. At this time, in order to ensure the accuracy of insulation abnormality identification, it is possible to determine whether the new energy hydrogen production system has insulation abnormality only through the leakage current value output by the energy storage module 200. Therefore, the control module 30 can only control the leakage current detection module 20 to start working, without controlling the insulation resistance detection module 10 to work, so as to accurately determine whether the new energy hydrogen production system has insulation abnormality.

[0056] Therefore, this embodiment limits the working scenarios of the insulation resistance detection module 10 and the leakage current detection module 20, so that in different scenarios, only one of the insulation resistance detection module 10 and the leakage current detection module 20 will work, and the other will not work. Therefore, compared with the two working at the same time, the power consumption of the new energy hydrogen production system can be reduced to a certain extent.

[0057] The utility model also provides a new energy hydrogen production system. In the fifth embodiment of the utility model, please refer to Figure 3 The new energy hydrogen production system may include a power generation module 300, a DC bus, a hydrogen production module 100, an energy storage module 200 and the insulation abnormality protection device of the above-mentioned embodiment; the DC bus is respectively connected to the output end of the power generation module 300, the second end of the hydrogen production module 100, the detection end of the insulation resistance detection module 10 of the insulation abnormality protection device, and the first end of the leakage current detection module 20, the first end of the energy storage module 200 is connected to the second end of the leakage current detection module 20, the control module 30 of the insulation abnormality protection device is respectively connected to the first end of the hydrogen production module 100, the second end of the energy storage module 200, the control end of the insulation resistance detection module 10, and the third end of the leakage current detection module 20, and the third end of the hydrogen production module 100 and the third end of the energy storage module 200 are grounded.

[0058] It should be noted that the power generation module 300 includes a power generation unit of at least one energy type, and the energy type may be wind energy, solar energy or other new energy sources, etc., which is not specifically limited in this embodiment. The structural composition of the power generation unit is determined by the energy type used for power generation. For example, assuming that the energy type is solar energy, the power generation unit may be a photovoltaic module.

[0059] In one possible implementation, please refer to Figure 4 The hydrogen production module 100 may include a first DC converter 101 and an electrolyzer 102; a first end of the first DC converter 101 is connected to the control module 30, a second end of the first DC converter 101 is connected to the DC bus, a third end of the first DC converter 101 is connected to one end of the electrolyzer 102, and the other end of the electrolyzer 102 is grounded.

[0060] In one possible implementation, please refer to Figure 4 The energy storage module 200 may include a second DC converter 201 and an energy storage battery 202; a first end of the second DC converter 201 is connected to the control module 30, a second end of the second DC converter 201 is connected to a second end of the leakage current detection module 20, a third end of the second DC converter 201 is connected to one end of the energy storage battery 202, and the other end of the energy storage battery 202 is grounded.

[0061] It should be noted that the energy storage battery 202 can be a lithium-ion battery or the like.

[0062] The control module 30 can stop the electrolytic cell 102 from working by controlling the first DC converter 101 to shut down; and can stop the energy storage battery 202 from working by controlling the second DC converter 201 to shut down.

[0063] In a feasible implementation, the topological structures of the first DC converter 101 included in the hydrogen production module 100 and the second DC converter 201 included in the energy storage module 200 are both non-isolated topological structures.

[0064] It can be understood that, under normal circumstances, the problem of insulation damage to the ground in the energy storage module and the DC bus is caused by the non-isolated topology structure of the hydrogen production module and the energy storage module. Therefore, this embodiment limits the impact of insulation abnormality avoided by the insulation abnormality protection device of the utility model, which is aimed at the impact of insulation abnormality caused by the new energy hydrogen production system in the scenario where the topology structure of the DC converter included in the hydrogen production module and the energy storage module is a non-isolated topology structure, so that the insulation abnormality protection device of the utility model is more targeted for the insulation abnormality protection of the new energy hydrogen production system.

[0065] Since the new energy hydrogen production system of this embodiment includes all the technical solutions of all the embodiments of the above-mentioned insulation abnormality protection device, and the technical effects achieved are exactly the same, they will not be repeated here.

[0066] The utility model also provides a hydrogen production device, which includes a new energy hydrogen production system. The structure of the new energy hydrogen production system can refer to the above embodiment and will not be repeated here. As it should be, since the hydrogen production device of this embodiment includes all technical solutions of all embodiments of the above new energy hydrogen production system, and the technical effects achieved are also exactly the same, they will not be repeated here.

[0067] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An insulation abnormality protection device, characterized in that: include: An insulation resistance detection module, which is used to connect the DC bus of the new energy hydrogen production system and detect the insulation resistance value of the DC bus to the ground; A leakage current detection module, which is used to connect the DC bus and the energy storage module of the new energy hydrogen production system respectively, and is used to detect the leakage current value output by the energy storage module; A control module, wherein the control module is respectively connected to the insulation resistance detection module and the leakage current detection module, and the control module is used to respectively connect to the energy storage module and the hydrogen production module of the new energy hydrogen production system, and is used to enable insulation abnormality protection for the new energy hydrogen production system when the insulation resistance value detected by the insulation resistance detection module is less than a preset resistance threshold, and / or the leakage current value detected by the leakage current detection module is greater than a preset current threshold.

2. The insulation abnormality protection device according to claim 1, characterized in that: The insulation resistance detection module is a resistance detector.

3. The insulation abnormality protection device according to claim 1, characterized in that: The leakage current detection module is a current sensor.

4. The insulation abnormality protection device according to any one of claims 1 to 3, characterized in that: The control module comprises: a first comparator, wherein the positive input end of the first comparator is connected to the insulation resistance detection module, the negative input end of the first comparator is connected to the preset resistance threshold, and the output end of the first comparator is used to connect the hydrogen production module and the energy storage module respectively, and is used to compare the insulation resistance value detected by the insulation resistance detection module with the preset resistance threshold, and when it is determined that the insulation resistance value is less than the preset resistance threshold, enable insulation abnormality protection for the new energy hydrogen production system; A second comparator, wherein the positive input terminal of the second comparator is connected to the preset current threshold, the negative input terminal of the second comparator is connected to the leakage current detection module, and the output terminal of the second comparator is used to connect the hydrogen production module and the energy storage module respectively, and is used to compare the leakage current value detected by the leakage current detection module with the preset current threshold, and when it is determined that the leakage current value is greater than the preset current threshold, enable insulation abnormality protection for the new energy hydrogen production system.

5. A new energy hydrogen production system, characterized in that: The new energy hydrogen production system comprises a power generation module, a DC bus, a hydrogen production module, an energy storage module and an insulation abnormality protection device as described in any one of claims 1 to 4; The DC bus is respectively connected to the power generation module, the hydrogen production module, the leakage current detection module and the insulation resistance detection module of the insulation abnormality protection device; the energy storage module is connected to the leakage current detection module; the control module of the insulation abnormality protection device is respectively connected to the hydrogen production module, the energy storage module, the insulation resistance detection module and the leakage current detection module; the hydrogen production module and the energy storage module are grounded.

6. The new energy hydrogen production system according to claim 5, characterized in that: The power generation module includes a power generation unit of at least one energy type, and the energy type is wind energy or solar energy.

7. The new energy hydrogen production system according to claim 5, characterized in that: The hydrogen production module includes a first DC converter and an electrolyzer; The first end of the first DC converter is connected to the control module, the second end of the first DC converter is connected to the DC bus, the third end of the first DC converter is connected to one end of the electrolytic cell, and the other end of the electrolytic cell is grounded.

8. The new energy hydrogen production system according to claim 5, characterized in that: The energy storage module includes a second DC converter and an energy storage battery; A first end of the second DC converter is connected to the control module, a second end of the second DC converter is connected to the leakage current detection module, a third end of the second DC converter is connected to one end of the energy storage battery, and the other end of the energy storage battery is grounded.

9. The new energy hydrogen production system according to any one of claims 5 to 8, characterized in that: The topological structures of the first DC converter included in the hydrogen production module and the second DC converter included in the energy storage module are both non-isolated topological structures.

10. A hydrogen production device, characterized in that: The hydrogen production equipment comprises the new energy hydrogen production system as described in any one of claims 5 to 9.

Images