CN117360331A - Redundancy control method and device for fuel cell engine system fault - Google Patents

Abstract

The application provides a redundancy control method and device for a fuel cell engine system fault, comprising the following steps: determining whether each target engine has a fault according to the corresponding running state of each target engine; if any target engine has a fault, starting an engine unit fault redundancy processing strategy, and replacing the fault engine by the spare engine; if all the target engines normally run, determining whether the fuel cell engine system is in a power balance state according to the running power data, and if the fuel cell engine system is in the power balance state, running a preset power grid interactive redundancy control strategy, and charging and discharging the battery through the power conversion module until the fuel cell engine system reaches the power balance state again. According to the method and the device, through redundant control among the plurality of engines, the output power of the engines is guaranteed, meanwhile, the system loss caused by engine shutdown due to system faults is reduced, and the safety of the system is improved.

Description

Redundancy control method and device for fuel cell engine system fault

Technical Field

The present disclosure relates to the field of operation and maintenance of fuel cells, and in particular, to a redundant control method and apparatus for a fault of an engine system of a fuel cell.

Background

With the increasing worsening of environmental pollution and energy shortage, the fuel cell automobile is developed, the fuel cell engine is used as the heart of the fuel cell system, and plays an irreplaceable role in ensuring the normal and stable operation of the fuel cell system, in order to meet the electrical design requirement of a high-power engine and ensure the normal operation during faults, the fault tolerance treatment is carried out when the ultrahigh-power engine unit system fails, and how to accurately control the charge and discharge power of the battery is a great difficulty, and the fault tolerance treatment technology of the prior art scheme for the fuel cell engine is mainly represented by the fault tolerance control or the temperature fault tolerance control of the air supply quantity of the air supply system of a single engine.

The prior art has few problems in the fault redundancy control technology of a plurality of engine unit systems during faults, after a plurality of engines are switched in parallel to have faults, the power of the engine unit is abnormal, the system loss caused by engine shutdown is caused, and the reasonable distribution of system load resources cannot be ensured.

Disclosure of Invention

In view of this, the present application aims to provide at least a redundancy control method and apparatus for a failure of a fuel cell engine system, which can reduce system loss caused by engine shutdown due to system failure while ensuring engine output power by redundancy control between a plurality of engines, thereby improving system safety.

The application mainly comprises the following aspects:

in a first aspect, an embodiment of the present application provides a redundancy control method for a fault of a fuel cell engine system, where the fuel cell engine system includes a plurality of engine blocks and a plurality of power conversion modules, the plurality of engine blocks are connected in one-to-one correspondence with the plurality of power conversion modules, each power conversion module is further connected to an electric load and an electric grid, so as to implement bidirectional conversion of electric energy between the electric grid and the engine blocks, each engine block includes a plurality of engines connected in parallel, and the method includes: the starting instruction is used for sending a starting instruction to the target engine so as to start the target engines through the power conversion modules, and the engine except the target engines is used as a standby engine, wherein the starting instruction comprises a target engine identifier and a starting signal corresponding to the target engine identifier; reading corresponding operation data of each target engine through a state acquisition module installed on each target engine; determining whether a failed target engine exists according to the operation data corresponding to each target engine; if any target engine fails, starting a failure processing strategy, and replacing the failed engine by the standby engine; if all the target engines are normally operated, determining whether the fuel cell engine system is in a power balance state according to the operation data; if the fuel cell engine system is in a power balance state, the follow-up operation is not performed, so that the fuel cell engine system normally operates; and if the fuel cell engine system is in a power unbalance state, running a preset power grid interactive redundancy control strategy, and charging and discharging the battery through the power conversion module until the fuel cell engine system reaches the power balance state again.

In one possible embodiment, the step of initiating the fault handling strategy, replacing the faulty engine with the spare engine, comprises: determining a failed target engine as a failed engine; randomly selecting at least one target standby engine from a plurality of standby engines and generating a standby replacement instruction, wherein the standby replacement instruction comprises a target standby engine identifier, a starting signal corresponding to the target standby engine identifier, a fault engine identifier and a shutdown signal corresponding to the fault engine identifier; issuing a standby replacement instruction to the plurality of power conversion modules to automatically switch at least one failed engine to at least one target standby engine, wherein the number of target standby engines is the same as the number of failed engines; updating a plurality of target engines and re-reading the corresponding operation data of each target engine until all target engines are operated normally.

In one possible implementation, the operating data includes engine output power, wherein determining whether the fuel cell engine system is in a power balance state is performed by: calculating the total output power corresponding to all target engines according to the output power of the engine corresponding to each target engine; comparing the total output power with the load demand power corresponding to the fuel cell engine system, wherein the load demand power is the power for maintaining the normal operation of the fuel cell engine system; if the total output power is equal to the load demand power, determining that the fuel cell engine system is in a power balance state; if the total power output is greater than or less than the load demand power, the fuel cell engine system is determined to be in a power imbalance state.

In one possible implementation manner, the step of running a preset power grid interactive redundancy control strategy, and charging and discharging the battery through the power conversion module until the total output power meets the power balance condition includes: generating a power instruction according to the total output power and the load demand power, wherein the power instruction is used for realizing charging or discharging of a plurality of target engines; and issuing a constant voltage balancing strategy and a power command to the plurality of power conversion modules, so that each power conversion module enables the fuel cell engine system to be in a power balance state according to the constant voltage balancing strategy and the power command.

In one possible implementation, the power command includes a discharging power command and a charging power command, the discharging power command compensates power for the power grid for the target engine, the charging power command charges the power grid for the target engine, and the step of generating the power command according to the total output power and the load demand power includes: if the total output power is smaller than the load demand power, a charging power instruction is generated; and if the total output power is larger than the load demand power, generating a discharge power instruction.

In one possible embodiment, the constant pressure balancing strategy comprises a first constant pressure balancing strategy and a second constant pressure balancing strategy, wherein the fuel cell engine system is placed in a power balanced state by: if the power command is a discharge power command, entering a discharge balance process: determining discharge power, and transmitting a first constant voltage balance strategy to a plurality of power conversion modules, so that the fuel cell engine system is in a power balance state according to the first constant voltage balance strategy and the discharge power by utilizing each power conversion module, wherein the discharge power is the difference between the load demand power and the output total power; if the power command is a charging power command, entering a charge balance process: and determining charging power, and transmitting the second constant voltage balancing strategy to the plurality of power conversion modules so as to enable the fuel cell engine system to be in a power balance state according to the second constant voltage balancing strategy and the charging power by utilizing each power conversion module.

In one possible implementation, the first constant pressure balancing strategy is: the output voltage of the power grid is kept unchanged, and the output current of the power grid is regulated to enable the output power of the power grid to reach the discharge power; the second constant pressure balancing strategy is: the output voltage of the power grid is kept unchanged, and the output current of the power grid is regulated, so that the output power of the power grid reaches the charging power.

In a second aspect, embodiments of the present application further provide a redundancy control apparatus for a failure of a fuel cell engine system, the fuel cell engine system including a plurality of engine blocks connected in parallel and a plurality of power conversion modules, the plurality of engine blocks being connected in one-to-one correspondence with the plurality of power conversion modules, each power conversion module being further connected to an electric load and an electric grid to achieve bidirectional conversion of electric energy between the electric grid and the engine blocks, each engine block including a plurality of engines connected in parallel, the apparatus comprising: the starting module is used for sending starting instructions to the plurality of power conversion modules so as to start the plurality of target engines through the plurality of power conversion modules, and taking the engines except the plurality of target engines as standby engines, wherein the starting instructions comprise target engine identifications and starting signals corresponding to the target engine identifications; the reading module is used for reading the operation data corresponding to each target engine from the state acquisition module installed on each target engine; the fault determining module is used for determining whether a faulty target engine exists according to the operation data corresponding to each target engine; the fault processing module is used for starting a fault processing strategy if any target engine fails, and replacing the failed engine by the spare engine; the balance state determining module is used for determining whether the fuel cell engine system is in a power balance state according to the operation data if all the target engines are in normal operation; the balance state processing module is used for enabling the fuel cell engine system to normally operate without performing subsequent operation if the fuel cell engine system is in a power balance state; and the unbalance state processing module is used for running a preset power grid interaction redundancy control strategy if the fuel cell engine system is in a power unbalance state, and charging and discharging the battery through the power conversion module until the fuel cell engine system reaches the power balance state again.

In a third aspect, embodiments of the present application further provide an electronic device, including: a processor, a memory and a bus, the memory storing machine readable instructions executable by the processor, the processor and the memory in communication over the bus when the electronic device is in operation, the machine readable instructions when executed by the processor performing the steps of the redundant control method of a fuel cell engine system failure in the first aspect or any of the possible implementations of the first aspect.

In a fourth aspect, the embodiments of the present application further provide a computer readable storage medium, on which a computer program is stored, which when executed by a processor performs the steps of the redundancy control method for a fuel cell engine system failure in the first aspect or any one of the possible implementation manners of the first aspect.

The redundant control method and device for the faults of the fuel cell engine system provided by the embodiment of the application comprise the following steps: reading operation data corresponding to each target engine; determining whether a failed target engine exists according to the operation data corresponding to each target engine; if any target engine fails, starting a failure processing strategy, and replacing the failed engine by the standby engine; if all the target engines are normally operated, determining whether the fuel cell engine system is in a power balance state according to the operation data, and if the fuel cell engine system is in the power balance state, operating a preset power grid interactive redundancy control strategy, and charging and discharging the battery through the power conversion module until the fuel cell engine system reaches the power balance state again. According to the method and the device, through redundant control among the plurality of engines, the output power of the engines is guaranteed, meanwhile, the system loss caused by engine shutdown due to system faults is reduced, and the safety of the system is improved.

The application has the advantages that:

(1) The scheme can realize redundant fault-tolerant control of multiple engines while ensuring the improvement of the power of the engines, reduce the system loss caused by the shutdown of the engines due to the system faults, ensure the reliable operation and fault recovery capability of the engine unit system and improve the reliability, safety and usability of the system.

(2) After the engine unit is switched to fail, the load distribution rationality of the engines can be ensured through load balancing and cooperative control, and the cooperative work among the engines can be realized.

(3) The power conversion module can realize redundant control of power according to the power instruction when the battery power is abnormal, and can accurately control charge and discharge of the battery power.

In order to make the above objects, features and advantages of the present application more comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered limiting the scope, and that other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 shows one of the structural schematic diagrams of a fuel cell engine system provided in an embodiment of the present application;

FIG. 2 shows a second schematic diagram of a fuel cell engine system according to an embodiment of the present application;

FIG. 3 illustrates a flow chart of a redundant control method of a fuel cell engine system failure provided by an embodiment of the present application;

FIG. 4 illustrates a flow chart of a fault handling strategy provided by an embodiment of the present application;

fig. 5 shows a flowchart of steps of a preset grid interactive redundancy control strategy according to an embodiment of the present application;

FIG. 6 shows a functional block diagram of a redundant control for fuel cell engine system failure provided in an embodiment of the present application;

fig. 7 shows a schematic structural diagram of an electronic device according to an embodiment of the present application.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it should be understood that the accompanying drawings in the present application are only for the purpose of illustration and description, and are not intended to limit the protection scope of the present application. In addition, it should be understood that the schematic drawings are not drawn to scale. A flowchart, as used in this application, illustrates operations implemented according to some embodiments of the present application. It should be appreciated that the operations of the flow diagrams may be implemented out of order and that steps without logical context may be performed in reverse order or concurrently. Moreover, one or more other operations may be added to the flow diagrams and one or more operations may be removed from the flow diagrams as directed by those skilled in the art.

In addition, the described embodiments are only some, but not all, of the embodiments of the present application. The components of the embodiments of the present application, which are generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, as provided in the accompanying drawings, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, are intended to be within the scope of the present application.

The fault tolerance processing technology of the prior technical proposal for the fuel cell engine is mainly characterized in that the fault tolerance control or the temperature fault tolerance control of the air supply quantity of the air supply system of the single engine is realized.

The prior art has the following technical problems:

(1) When the engines are in fault after the plurality of engines are connected in parallel, the fault tolerance processing scheme of the engine unit system is less, and because of the fault of the engine unit, the high power requirement of the load cannot be met, the economy, the reliability, the running efficiency and the like of the system cannot be ensured, and potential safety hazards exist.

(2) After the parallel switching failure of a plurality of engines, the rationality of the distribution of system load resources cannot be ensured, and the engines cannot work cooperatively.

(3) When the power of the engine unit is abnormal, the power unit cannot be in redundant coordination control with a power grid, and accurate charging and discharging of the battery cannot be realized.

Based on this, the embodiment of the application provides a redundancy control method and device for a fuel cell engine system fault, which reduces system loss caused by engine shutdown due to system fault while guaranteeing engine output power through redundancy control among a plurality of engines, and improves system safety, specifically as follows:

referring to fig. 1, fig. 1 shows a schematic structural diagram of a fuel cell engine system according to an embodiment of the present application. As shown in fig. 1, the fuel cell engine system includes a plurality of engine blocks 1 and a plurality of power conversion modules 2, the plurality of power conversion modules 2 together form an inverter cabinet, the plurality of engine blocks 1 are connected with the plurality of power conversion modules 2 in a one-to-one correspondence manner, each power conversion module 2 is further connected to an electric load 4 and an electric network 5 so as to realize bidirectional conversion of electric energy between the electric network 5 and the engine blocks 1, the fuel cell engine system further includes an engine high-voltage distribution subsystem 6 upper computer connected with the plurality of power conversion modules 2 so as to realize redundant control of the plurality of engine blocks 1 through the plurality of power conversion modules 2, the fault redundancy controller cooperatively regulates the plurality of engine blocks 1 through the plurality of inverter cabinets 2, and the plurality of power conversion modules 2 realize charging or discharging of the plurality of engine blocks 1 according to instructions or information received from the upper computer.

Referring to fig. 2, fig. 2 shows a second schematic structural diagram of a fuel cell engine system according to an embodiment of the present disclosure. As shown in fig. 2, each engine block 1 includes a plurality of engines 11 connected in parallel, and each engine 11 includes a stack A1 and a boost DC/DC chip A2 connected in series, the boost DC/DC chip A2 being capable of converting the voltage output from the stack A1 into a desired voltage value.

Specifically, assuming that the fuel cell engine system includes 6 engine blocks 1, each engine block 1 includes four engines 11, and the rated operating power of each engine 11 is 120kW, the total of all 6 engine blocks 1 can provide 120kw×24=2.88 MW of rated operating power.

The fuel cell engine system further comprises a direct current EMC filter 7 correspondingly connected with each engine unit 1, for each engine unit 1, a plurality of corresponding engines A1 in the engine unit 1 are connected in parallel and then connected into the direct current EMC filter 7 corresponding to the engine unit 1, and the direct current EMC filter 7 is mainly used for filtering out the conduction interference of the input signals of the engine unit, inhibiting and attenuating the influence of noise signal interference generated by the outside on the protected electrical equipment, and simultaneously inhibiting and attenuating the influence of the system on the outside.

After passing through the corresponding direct current EMC filter 7, each engine unit 1 is connected into the corresponding power conversion module 2 of the engine unit 1, wherein each power conversion module 2 comprises an energy storage converter PCS and a direct current lightning protection device 21 which are connected in parallel, on one hand, the energy storage converter PCS realizes bidirectional conversion of electric energy between the engine unit and a power grid, on the other hand, the direct current lightning protection device 21 CAN prevent equipment damage caused by surge invasion into the direct current system, the energy storage converter PCS receives a control instruction sent by an upper computer through CAN communication, and coordinated control of the engine unit (comprising start and stop of an engine in the engine unit and charge/discharge of the engine unit) is realized according to the received control instruction, so that active power and reactive power of the power grid CAN be regulated, and meanwhile, the energy storage converter PCS CAN acquire corresponding running state information of the engine in the engine unit according to a CAN communication interface, so that battery flexibility charge and discharge are realized, and battery running safety is ensured.

The fuel cell engine system further comprises an LC filter 8, each energy storage converter PCS converts the direct current voltage supplied by the corresponding engine unit into inverted alternating current three-phase power, the inverted alternating current signal is input to the LC filter 8, and the inverted alternating current signal passes through the LC filter 8, and utilizes the characteristics of blocking direct current through the capacitor and blocking alternating current through the inductor to filter out one or more harmonics in the input alternating current signal, so as to obtain a required alternating current signal.

As shown in fig. 2, the ac signal coming out of the LC filter 8 is divided into 3 paths, the first path is connected to the high-voltage power distribution subsystem 6 and the low-voltage power distribution subsystem 9 of the engine, the second path is connected to the electric load 4, and the third path is connected to the power grid 5.

Preferably, the first output corresponding to the LC filter 8 is connected to the low-voltage distribution 9 through a breaker K1 and a 24V isolated power source 91 in sequence, and the first output corresponding to the LC filter 8 is also connected to the high-voltage distribution subsystem 6 of the engine through a breaker K1 and a fuse FU.

The electrical load 4 includes, but is not limited to, at least one of the following: the deionized water purifier 41, the three-phase alternating current water pump frequency converter 42, the three-phase alternating current air compressor frequency converter 43 and the expander 44 are connected in parallel, and the deionized water purifier 41 is used as an example, the deionized water purifier 41, the three-phase alternating current water pump frequency converter 42, the three-phase alternating current air compressor frequency converter 43 and the expander 44 are connected into a second path of output corresponding to the LC filter 8 through corresponding protection modules in sequence, and the protection modules comprise fuses FU and a breaker K1 which are connected in series.

The power grid 5 comprises a 380V power grid and a 10KV power grid, the fuel cell engine system further comprises an alternating current EMC filter B, a first transformer T1 and a second transformer T2, wherein a third path of output corresponding to the LC filter 8 is output, after irrelevant harmonic waves are filtered through the alternating current EMC filter B and reactive power consumed by the direct current control system is compensated, the alternating current lightning protection device is respectively connected, the 380V power grid is connected through the first transformer T1, the 10KV power grid is connected through the second transformer T2, the first transformer T1 and the second transformer T2 adopt different transformation ratios, and the first transformer T1 can be 1:1 power frequency transformer, second transformer T2 can select 1: and the 27 power frequency transformer, the alternating current EMC filter B can avoid bringing adverse effects to an alternating current transmission system, and an alternating current contactor K2 and a breaker K1 are arranged on each phase line between the alternating current EMC filter B and the output of the LC filter 8 in series.

The three-phase power output by the AC EMC filter B is also connected to an AC lightning protection device which can prevent surge from damaging equipment, and a circuit breaker K1 is also connected in series on each phase of the AC EMC filter B connected with the first transformer T1.

Referring to fig. 3, fig. 3 is a flowchart illustrating a redundant control method for a fuel cell engine system fault according to an embodiment of the present application. As shown in fig. 3, the method provided in the embodiment of the present application is applied to an upper computer, and the method includes:

and S100, sending a starting instruction to the plurality of power conversion modules so as to start the plurality of target engines through the plurality of power conversion modules, and taking the engine except the plurality of target engines as a standby engine.

The starting instruction comprises a target engine identifier and a starting signal corresponding to the target engine identifier.

S200, reading operation data corresponding to each target engine from a state acquisition module installed on each target engine.

And each engine is provided with a corresponding state acquisition module.

S300, determining whether a failed target engine exists according to the operation data corresponding to each target engine.

And S400, if any target engine fails, starting a failure processing strategy, and replacing the failed engine by the standby engine.

S500, if all target engines are normally operated, determining whether the fuel cell engine system is in a power balance state according to the operation data.

And S600, if the fuel cell engine system is in a power balance state, the follow-up operation is not performed, so that the fuel cell engine system is normally operated.

And S700, if the fuel cell engine system is in a power unbalance state, running a preset power grid interactive redundancy control strategy, and charging and discharging the battery through the power conversion module until the fuel cell engine system reaches a power balance state again.

In step S100, a start command is sent to a plurality of power conversion modules, specifically, the number of starts corresponding to a plurality of generators may be determined in advance according to the load demand power required by the fuel cell engine system, then, a plurality of target generators corresponding to the number of starts are randomly selected from the plurality of generators to generate a corresponding start command, the plurality of power conversion modules start the plurality of target engines according to the start command, for each power conversion module, after receiving the start command, it is determined whether an engine indicated by a target engine identifier in the start command exists in an engine unit controlled by the power conversion module, if so, a corresponding start signal is sent to the corresponding target engine to control the start of the engine, and if not, no control action is performed.

In step S200, after the plurality of target engines are started, corresponding operation data may be directly read from each target engine, where each engine is connected to a state acquisition module for acquiring an engine operation state, the state acquisition module may send the acquired operation data corresponding to the engine to the host computer and a power conversion module corresponding to the engine, where the state acquisition module includes a plurality of sensors for acquiring the operation data, and the operation data includes a plurality of operation parameters including, but not limited to, at least one of the following: temperature, pressure, voltage, output power and current.

In step S300, if the sampled value of any one of the operation parameters does not satisfy the rated index value corresponding to the operation parameter for each target engine, it is determined that the target engine is out of order.

In step S400, if any of the target engines fails, the failure processing strategy is started, the failed engine is replaced by the spare engine, and then the plurality of target engines are updated, and the process returns to step S200 again.

In step S500 to step S700, after determining that all the target engines are running normally, it is required to determine whether the fuel cell engine system is in a power balance state, where the power balance state refers to a charge-discharge balance state of a plurality of target engines, and when the fuel cell engine system is in a power imbalance state, a preset power grid interactive redundancy control strategy is required to be run, and the power conversion module charges and discharges the battery, so that the fuel cell engine system is in a power balance state, and the running safety of the system is improved.

In the steps S100-S700, fault control between engine units is combined with power grid interaction redundancy control, the power of the engine is ensured through fault regulation, system loss caused by engine shutdown due to system faults is reduced, a battery is charged and discharged through a power conversion module by running a preset power grid interaction redundancy control strategy, power interaction between the power generator unit in a fuel cell engine system, a power grid and a power utilization load is always in a power balance state, and therefore system safety can be improved, and the power grid charging and discharging of the power generator unit can be accurately controlled.

In a preferred embodiment, before step S100, after the fuel cell engine system is powered on, an initialization self-checking instruction is specifically sent to a plurality of power conversion modules, where the initialization self-checking instruction includes self-checking trigger signals corresponding to all the engines, the plurality of power conversion modules control all the engines to implement self-checking after receiving the initialization self-checking instruction, and the self-checking information fed back by each engine is acquired through a state acquisition module, where the self-checking information includes a working state corresponding to each engine, and after confirming that all the engines are in a normal working state, the execution step S100 is performed.

In a preferred embodiment, referring to fig. 4, fig. 4 shows a flow chart of a fault handling strategy provided in an embodiment of the present application. As shown in fig. 4, step S400 includes:

s4001, determining a failed target engine as a failed engine.

And issuing a standby replacement instruction to the plurality of controllers so as to automatically switch at least one faulty engine to at least one target standby engine, wherein the number of the target standby engines is the same as that of the faulty engines, updating the plurality of target engines and re-reading the operation data corresponding to each target engine.

In one embodiment, the fault handling policy includes:

s4001, determining a failed target engine as a failed engine.

S4002, randomly selecting at least one target standby engine from a plurality of standby engines and generating a standby replacement instruction.

The standby replacement instruction comprises a target standby engine identifier, a starting signal corresponding to the target standby engine identifier, a fault engine identifier and an outage signal corresponding to the fault engine identifier.

S4003, issuing a standby replacement instruction to the plurality of power conversion modules to automatically switch the at least one failed engine to the at least one target standby engine.

Wherein the number of target backup engines is the same as the number of failed engines.

S4004, updating the plurality of target engines, and returning to step S200.

In step S400 of the present application, if a faulty engine is assumed, at this time, a target standby engine for replacing the faulty engine is randomly determined and a replacement instruction is generated, each power conversion module determines, according to the target standby engine identifier and the faulty engine identifier, whether the target standby engine and the faulty engine are associated with each other, and if the target standby engine and/or the faulty engine are/is present, a start instruction is sent to the target standby engine and/or an outage instruction is sent to the faulty engine, after replacing the faulty motor with the standby motor, it is necessary to return to step S200 to perform fault identification again until all the target engines are operating normally.

In another preferred embodiment, the operating data comprises engine output power, wherein step S500 comprises:

calculating the total output power corresponding to all target engines according to the engine output power corresponding to each target engine, comparing the total output power with the load demand power corresponding to the fuel cell engine system, wherein the load demand power is the power for maintaining the normal operation of the fuel cell engine system, if the total output power is equal to the load demand power, determining that the fuel cell engine system is in a power balance state, and if the total output power is greater than or less than the load demand power, determining that the fuel cell engine system is in a power unbalance state.

Specifically, in the present application, the load demand power is equal to the total power between rated powers corresponding to the power loads of the access systems, the fuel cell engine system is in a power balance state only when the output total power is equal to the load demand power, when the output total power is smaller than the load demand power or when the output total power is smaller than the load demand power, it is indicated that the power provided by the plurality of target engine units cannot meet the power load demand, the output total power provided by the plurality of target engine units is in an insufficient state, when the output total power is larger than the load demand power or when the output total power is larger than the load demand power, it is indicated that the power provided by the plurality of target engine units exceeds the power load demand, the output total power provided by the plurality of target engine units is in a residual state, and under both conditions, the output total power of the plurality of target engine units is in an abnormal state, so that the fuel cell engine system is in a power imbalance state.

In another preferred embodiment, step S700 includes:

and generating a power instruction according to the total output power and the load demand power, wherein the power instruction is used for realizing the charging or discharging of a plurality of target engines, and transmitting a constant voltage balancing strategy and the power instruction to a plurality of power conversion modules so as to enable the fuel cell engine system to be in a power balance state according to the constant voltage balancing strategy and the power instruction through each power conversion module.

The power command comprises a discharging power command and a charging power command, wherein the discharging power command is used for carrying out power compensation on the power grid for the target engine, and the charging power command is used for charging the target engine for the power grid.

In one embodiment, the step of generating the power command according to the total output power and the load demand power comprises:

and if the total output power is smaller than the load demand power, generating a charging power instruction, and if the total output power is larger than the load demand power, generating a discharging power instruction.

Specifically, when the total output power is smaller than the load demand power or, it is indicated that the power provided by the multiple target engine units cannot meet the power consumption load demand, at this time, the power grid needs to be accessed, the multiple generator units are charged through the power grid to complement the load demand power, when the total output power is larger than the load demand power or, it is indicated that the power provided by the multiple target engine units exceeds the power consumption load demand, the total output power provided by the multiple target engine units is in a residual state, at this time, the power grid needs to be accessed as well, and the multiple target engine units are controlled to discharge the power grid so as to release the redundant power of the multiple target engine units.

The constant voltage balancing strategy includes a first constant voltage balancing strategy and a second constant voltage balancing strategy.

Wherein the fuel cell engine system is brought into a power balanced state by:

if the power command is a discharge power command, entering a discharge balance process: and determining the discharge power, and transmitting the first constant voltage balance strategy to a plurality of power conversion modules so as to enable the fuel cell engine system to be in a power balance state according to the first constant voltage balance strategy and the discharge power by utilizing each power conversion module, wherein the discharge power is the difference value between the load demand power and the output total power.

Specifically, the first constant pressure balancing strategy is: and the output voltage of the power grid is kept unchanged, and the output current of the power grid is regulated to enable the output power of the power grid to reach the discharge power.

If the power command is a charging power command, entering a charge balance process: and determining charging power, and transmitting the second constant voltage balancing strategy to the plurality of power conversion modules so as to enable the fuel cell engine system to be in a power balance state according to the second constant voltage balancing strategy and the charging power by utilizing each power conversion module.

Specifically, the second constant pressure balancing strategy is: the output voltage of the power grid is kept unchanged, and the output current of the power grid is regulated, so that the output power of the power grid reaches the charging power.

Referring to fig. 5, fig. 5 is a flowchart illustrating steps of a preset power grid interaction redundancy control strategy according to an embodiment of the present application. As shown in fig. 5, includes:

s7001, judging whether the total output power is larger than the load demand power.

S7002, if the total output power is greater than the load demand power, a discharge power command is generated.

S7003, under the discharge power instruction, a first constant voltage balance strategy is adopted to enter discharge balance processing.

S7004, if the total output power is smaller than the load demand power, generating a charging power command.

And S7005, under the charging power instruction, adopting a second constant voltage balancing strategy to enter charging balancing processing.

S7006, it is determined whether the fuel cell engine system is in a power balance state.

S7007, if the fuel cell engine system is in the power balance state, the balance process is ended, and the process returns to step S200.

If the fuel cell engine system is not in the power balance state, the process returns to step S7001.

That is, the method can automatically complete fault diagnosis of the engine unit and switching of the fault engine, and after switching, the engine unit enters a power balance state corresponding to the fuel cell engine system under the condition of ensuring no fault engine, so that reasonable distribution of engine load is realized, the engine unit enters a balanced working state, and the operation safety of the system is ensured.

Based on the same application conception, the embodiment of the application also provides a redundancy control device for the fuel cell engine system fault, which corresponds to the redundancy control method for the fuel cell engine system fault provided by the embodiment, and because the principle of solving the problem by the device in the embodiment of the application is similar to that of the redundancy control method for the fuel cell engine system fault of the embodiment of the application, the implementation of the device can refer to the implementation of the method, and the repetition is omitted.

Referring to fig. 6, fig. 6 is a functional block diagram of a redundant control apparatus for a fuel cell engine system failure according to an embodiment of the present application. As shown in fig. 6, the apparatus includes:

the starting module 800 is configured to send a starting instruction to the plurality of power conversion modules, so as to start the plurality of target engines through the plurality of power conversion modules, and take the engine other than the plurality of target engines as a standby engine, where the starting instruction includes a target engine identifier and a starting signal corresponding to the target engine identifier.

And the reading module 810 is used for reading the operation data corresponding to each target engine from the state acquisition module installed on each target engine.

The fault determining module 820 is configured to determine whether a faulty target engine exists according to the operation data corresponding to each target engine.

The fault handling module 830 is configured to initiate a fault handling policy if any of the target engines fails, and replace the failed engine with the spare engine.

The balance state determining module 840 is configured to determine whether the fuel cell engine system is in a power balance state according to the operation data if all the target engines are operating normally.

The balance state processing module 850 is configured to, if the fuel cell engine system is in the power balance state, not perform subsequent operations, so that the fuel cell engine system operates normally.

And the imbalance state processing module 860 is configured to operate a preset power grid interactive redundancy control strategy if the fuel cell engine system is in a power imbalance state, and charge and discharge the battery through the power conversion module until the fuel cell engine system reaches a power balance state again.

Based on the same application concept, please refer to fig. 7, fig. 7 shows a schematic structural diagram of an electronic device according to an embodiment of the present application. The electronic device 900 includes: processor 910, memory 920, and bus 930, memory 920 storing machine-readable instructions executable by processor 910, which when executed by processor 910 performs the steps of the fuel cell engine system fault method as provided in any of the embodiments described above, when electronic device 900 is in operation, by communicating between processor 910 and memory 920 via bus 930.

Based on the same application concept, the embodiment of the present application further provides a computer readable storage medium, where a computer program is stored, and when the computer program is executed by a processor, the steps of the fuel cell engine system failure method provided in the above embodiment are executed.

It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described system and apparatus may refer to corresponding procedures in the foregoing method embodiments, which are not described herein again. In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. The above-described apparatus embodiments are merely illustrative, for example, the division of the units is merely a logical function division, and there may be other manners of division in actual implementation, and for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some communication interface, device or unit indirect coupling or communication connection, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a non-volatile computer readable storage medium executable by a processor. Based on such understanding, the technical solutions of the present application may be embodied in essence or a part contributing to the prior art or a part of the technical solutions, or in the form of a software product, which is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

The foregoing is merely a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes or substitutions are covered in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (10)

1. A redundancy control method for failure of fuel cell engine system is characterized in that the fuel cell engine system comprises a plurality of engine blocks and a plurality of power conversion modules, the plurality of engine blocks are connected with the plurality of power conversion modules in a one-to-one correspondence manner, each power conversion module is also connected to an electric load and an electric network so as to realize bidirectional conversion of electric energy between the electric network and the engine blocks, each engine block comprises a plurality of engines connected in parallel,

the method comprises the following steps:

transmitting a starting instruction to the plurality of power conversion modules to start a plurality of target engines through the plurality of power conversion modules, wherein the engine except the plurality of target engines is used as a standby engine, and the starting instruction comprises a target engine identifier and a starting signal corresponding to the target engine identifier;

Reading operation data corresponding to each target engine from a state acquisition module installed on each target engine;

determining whether a failed target engine exists according to the operation data corresponding to each target engine;

if any target engine fails, starting a failure processing strategy, and replacing the failed engine by the standby engine;

if all the target engines are normally operated, determining whether the fuel cell engine system is in a power balance state according to the operation data;

if the fuel cell engine system is in a power balance state, the follow-up operation is not performed, so that the fuel cell engine system normally operates;

and if the fuel cell engine system is in a power unbalance state, running a preset power grid interactive redundancy control strategy, and charging and discharging the battery through the power conversion module until the fuel cell engine system reaches a power balance state again.

2. The method of claim 1, wherein the step of initiating a fault handling strategy to replace the faulty engine with the spare engine comprises:

determining a failed target engine as a failed engine;

Randomly selecting at least one target standby engine from a plurality of standby engines and generating a standby replacement instruction, wherein the standby replacement instruction comprises a target standby engine identifier, a starting signal corresponding to the target standby engine identifier, a fault engine identifier and a shutdown signal corresponding to the fault engine identifier;

issuing a standby replacement instruction to the plurality of power conversion modules to automatically switch at least one failed engine to at least one target standby engine, wherein the number of target standby engines is the same as the number of failed engines;

updating a plurality of target engines and re-reading the corresponding operation data of each target engine until all target engines are operated normally.

3. The method of claim 1, wherein the operating data comprises engine output power,

wherein it is determined whether the fuel cell engine system is in a power balanced state by:

calculating the total output power corresponding to all target engines according to the output power of the engine corresponding to each target engine;

comparing the total output power with load demand power corresponding to the fuel cell engine system, wherein the load demand power is power for maintaining normal operation of the fuel cell engine system;

If the total output power is equal to the load demand power, determining that the fuel cell engine system is in a power balance state;

and if the total output power is greater than or less than the load demand power, determining that the fuel cell engine system is in a power imbalance state.

4. A method according to claim 3, wherein the step of operating a preset grid interactive redundancy control strategy, charging and discharging the battery via the power conversion module until the total output power meets a power balance condition comprises:

generating a power instruction according to the total output power and the load demand power, wherein the power instruction is used for realizing the charging or discharging of the target engines;

and transmitting a constant voltage balancing strategy and the power command to the plurality of power conversion modules so as to charge and discharge the battery through each power conversion module according to the constant voltage balancing strategy and the power command, and enabling the fuel cell engine system to be in a power balance state.

5. The method of claim 4, wherein the power command comprises a discharge power command and a charge power command, the discharge power command power compensates a power grid for the target engine, the charge power command charges the target engine for the power grid,

Wherein the step of generating a power command according to the total output power and the load demand power comprises:

if the total output power is smaller than the load demand power, a charging power instruction is generated;

and if the total output power is larger than the load demand power, generating a discharge power instruction.

6. The method of claim 5, wherein the constant voltage balancing strategy comprises a first constant voltage balancing strategy and a second constant voltage balancing strategy,

wherein the fuel cell engine system is placed in a power balanced state by:

if the power command is a discharge power command, entering a discharge balance process: determining a discharge power, and transmitting the first constant voltage balance strategy to the plurality of power conversion modules, so that the fuel cell engine system is in a power balance state according to the first constant voltage balance strategy and the discharge power by utilizing each power conversion module, wherein the discharge power is the difference value between the load required power and the output total power;

if the power command is a charging power command, entering a charge balance process: determining charging power, and transmitting the second constant voltage balancing strategy to the plurality of power conversion modules so as to enable the fuel cell engine system to be in a power balance state according to the second constant voltage balancing strategy and the charging power by utilizing each power conversion module.

7. The method of claim 6, wherein the first constant pressure balancing strategy is:

the output voltage of the power grid is kept unchanged, and the output current of the power grid is regulated to enable the output power of the power grid to reach the discharge power;

the second constant pressure balancing strategy is:

and the output voltage of the power grid is kept unchanged, and the output current of the power grid is regulated to enable the output power of the power grid to reach the charging power.

8. A redundant control device for failure of a fuel cell engine system is characterized in that the fuel cell engine system comprises a plurality of engine blocks and a plurality of power conversion modules which are connected in parallel, the plurality of engine blocks are connected with the plurality of power conversion modules in a one-to-one correspondence manner, each power conversion module is also connected to an electric load and an electric network so as to realize bidirectional conversion of electric energy between the electric network and the engine blocks, each engine block comprises a plurality of engines connected in parallel,

the device comprises:

the starting module is used for sending starting instructions to the plurality of power conversion modules so as to start the plurality of target engines through the plurality of power conversion modules, and taking the engines except the plurality of target engines as standby engines, wherein the starting instructions comprise target engine identifications and starting signals corresponding to the target engine identifications;

The reading module is used for reading the operation data corresponding to each target engine from the state acquisition module installed on each target engine;

the fault determining module is used for determining whether a faulty target engine exists according to the operation data corresponding to each target engine;

the fault processing module is used for starting a fault processing strategy if any target engine fails, and replacing the failed engine by the spare engine;

the balance state determining module is used for determining whether the fuel cell engine system is in a power balance state or not according to the operation data if all target engines are in normal operation;

the balance state processing module is used for enabling the fuel cell engine system to normally operate without performing subsequent operation if the fuel cell engine system is in a power balance state;

and the unbalance state processing module is used for running a preset power grid interactive redundancy control strategy if the fuel cell engine system is in a power unbalance state, and charging and discharging the battery through the power conversion module until the fuel cell engine system reaches the power balance state again.

9. An electronic device, comprising: a processor, a memory and a bus, said memory storing machine readable instructions executable by said processor, said processor and said memory in communication via said bus when the electronic device is operating, said machine readable instructions when executed by said processor performing the steps of the redundant control method of a fuel cell engine system failure according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored thereon a computer program which, when executed by a processor, performs the steps of the redundancy control method of a fuel cell engine system failure as claimed in any one of claims 1 to 7.