CN116247797A - Emergency interconnection method and device for multi-unit direct current system of power plant - Google Patents

Abstract

The disclosure provides an emergency interconnection method and device for a multi-unit direct current system of a power plant, which relate to the technical field of direct current power supply systems and comprise the following steps: in response to determining that any one of the multiple units of the direct current system is currently in a fault state, determining a target unit to be interconnected from the multiple units; and respectively performing switching-on operation on the first emergency interconnection switch and the second emergency interconnection switch corresponding to any unit so that any unit obtains an emergency power supply from a direct current bus of the target unit based on the first emergency interconnection cable connected with the first emergency interconnection switch and the second emergency interconnection cable connected with the second emergency interconnection switch. Therefore, when a certain unit fails, the direct current system and the standby charging device cannot normally supply power, the emergency connection switch between the direct current buses of the unit can be started, and the emergency connection switch is used for acquiring the direct current power supply from other units in short time so as to solve the needs under emergency conditions.

Description

Emergency interconnection method and device for multi-unit direct current system of power plant

Technical Field

The disclosure relates to the technical field of direct current power supply systems, in particular to an emergency interconnection method and device for a multi-unit direct current system of a power plant.

Background

When a whole power failure occurs in a power plant or a unit machine set loses station power, the power plant needs to be provided with a direct current power supply system for continuously supplying power to important direct current loads during the power failure in order to ensure the safe shutdown of the power plant machine set or prevent personal safety from being endangered. The direct current system of the power plant can be divided into a direct current system special for control, a direct current system special for power and a direct current system mixed with power control according to the application.

The generator set with larger single-machine capacity is usually provided with an independent direct current system special for control and a direct current system special for power respectively. At present, synchronous construction modes of domestic power plants are mostly: single machine construction, simultaneous construction of two machines, single machine extension on the basis of single machine, and the like, and the conditions that three units are synchronously constructed or three direct current systems of the three machines are mutually emergent are fewer. The construction scheme of a single machine and two machines is generally to jointly configure a power special direct current system according to each single machine or each two machines as a unit, and an emergency connection switch and a cable are arranged between the two machines direct current buses. For the configuration of the three-machine direct current system, multiple factors such as redundancy/mutual standby configuration between every two units, high voltage drop caused by long unit arrangement distance and economic change caused by increase of cable length and number of units are considered, so that the configuration scheme of the direct current system for power is complex.

In the related art, a set of direct current system for power is usually arranged on each machine, and the direct current system comprises two groups of storage batteries, three sets of charging devices and two sections of buses, and a connecting switch is arranged between the two sections of buses. However, the direct current systems of each unit are independent of each other, no connection exists, and the storage battery pack and the direct current equipment of the technology have large quantity and large occupied area, so the equipment and the occupied area are high.

Disclosure of Invention

The present disclosure aims to solve, at least to some extent, one of the technical problems in the related art.

An embodiment of a first aspect of the present disclosure provides an emergency interconnection method for a multi-unit dc system of a power plant, including:

in response to determining that any one of the multiple units of the direct current system is currently in a fault state, determining a target unit to be interconnected from the multiple units;

and respectively performing switching-on operation on the first emergency interconnection switch and the second emergency interconnection switch corresponding to any unit so that any unit obtains an emergency power supply from a direct current bus of the target unit based on the first emergency interconnection cable connected with the first emergency interconnection switch and the second emergency interconnection cable connected with the second emergency interconnection switch.

An embodiment of a second aspect of the present disclosure provides an emergency interconnection device for a multi-unit dc system of a power plant, including:

the determining module is used for determining a target unit to be interconnected from the multiple units in response to determining that any unit in the multi-unit direct current system is in a fault state at present;

the acquisition module is used for respectively carrying out closing operation on the first emergency interconnection switch and the second emergency interconnection switch corresponding to any unit so that any unit can acquire an emergency power supply from a direct current bus of the target unit based on the first emergency interconnection cable connected with the first emergency interconnection switch and the second emergency interconnection cable connected with the second emergency interconnection switch.

An embodiment of a third aspect of the present disclosure provides an electronic device, including: memory, a processor, and a computer program stored on the memory and executable on the processor. When the program is executed, the emergency interconnection method of the power plant multi-unit direct current system is realized, which is provided by the embodiment of the first aspect of the disclosure.

An embodiment of a fourth aspect of the present disclosure proposes a non-transitory computer readable storage medium storing a computer program to implement control logic of input, discrimination, calculation, delay, output, etc., to implement automatic switching of emergency tie switches and/or remote switching of centralized control room personnel, where the computer program, when executed by a processor, implements an emergency interconnection method of a power plant multi-unit dc system as proposed in the embodiment of the first aspect of the present disclosure.

The emergency interconnection method and device for the power plant multi-unit direct current system have the following beneficial effects:

in the embodiment of the disclosure, firstly, in response to determining that any unit in a multi-unit direct current system is in a fault state at present, a target unit to be interconnected is determined from a plurality of units, and then, switching-on operation is respectively carried out on a first emergency interconnection switch and a second emergency interconnection switch corresponding to the any unit, so that the any unit obtains an emergency power supply from a direct current bus of the target unit based on a first emergency interconnection cable connected with the first emergency interconnection switch and a second emergency interconnection cable connected with the second emergency interconnection switch. Therefore, when a certain unit fails, the direct current system and the standby charging device cannot normally supply power, the emergency connection switch between the direct current buses of the unit can be started, and the emergency connection switch is used for acquiring the direct current power supply from other units in short time so as to solve the needs under emergency conditions.

Additional aspects and advantages of the disclosure will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the disclosure.

Drawings

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

fig. 1 is a schematic flow chart of an emergency interconnection method of a power plant multi-unit dc system according to an embodiment of the disclosure;

FIG. 2 is a schematic diagram of a power plant multi-unit DC system according to an embodiment of the present disclosure;

FIG. 3 is a block diagram of an emergency interconnection device for a power plant multi-unit DC system according to an embodiment of the present disclosure;

fig. 4 illustrates a block diagram of an exemplary computer device suitable for use in implementing embodiments of the present disclosure.

Detailed Description

Embodiments of the present disclosure are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and intended for the purpose of explaining the present disclosure and are not to be construed as limiting the present disclosure.

The emergency interconnection method, the switching device, the computer equipment and the storage medium of the power plant multi-unit direct current system according to the embodiment of the disclosure are described below with reference to the accompanying drawings.

It should be noted that, the execution main body of the emergency interconnection method of the power plant multi-unit direct current system in the embodiment of the present disclosure is an emergency interconnection device of the power plant multi-unit direct current system, and the device may be implemented in a software and/or hardware manner, or may also be implemented by an electronic device provided by the present disclosure, where the electronic device may be used in the emergency interconnection device to implement automatic switching and/or remote switching, and the processor may select an output manner according to a preset computer program by determining whether the direct current bus is powered off, whether the contact switch is in an open/close state, and other input criteria. The remote switching-off/switching-on instruction can be directly received, and the output mode is selected after the controlled equipment is judged to be ready by a preset computer program. The emergency interconnection method of the power plant multi-unit direct current system provided in the embodiment of the present disclosure will be described below with "emergency interconnection device of the power plant multi-unit direct current system" as an execution subject, and is not limited herein.

The direct current power supply system (DC power supply system) is a system for supplying direct current power in power plants, substations and converter stations. The system consists of a storage battery pack, charging equipment, a direct current power distribution cabinet, a feed network and other direct current equipment.

In a bus (bus) refers to a connection copper bar or an aluminum bar of a circuit main switch and each sub-circuit switch in a power supply system, and the bus is mainly used as a wire.

Bus tie switch (bus tie switch), which is commonly referred to as a bus tie switch, may also be simply referred to as a bus tie, and refers to a tie switch between buses.

Fig. 1 is a schematic flow chart of an emergency interconnection method of a power plant multi-unit direct current system according to an embodiment of the disclosure.

As shown in fig. 1, the emergency interconnection method of the power plant multi-unit direct current system can include the following steps:

in step 101, in response to determining that any one of the multiple units of the direct current system is currently in a fault state, a target unit to be interconnected is determined from the multiple units.

The multiple units may be, for example, 3 units, or 4 units, or more in the multiple unit dc system, which is not limited herein.

In the embodiment of the disclosure, a 220V direct current system for power of a thermal power plant for synchronously constructing three 660MW units is schematically illustrated.

It should be noted that, according to the technical specification of the direct current system in the electric power industry, the capacity unit should be provided with 3 groups of storage batteries for each unit, wherein 2 groups of storage batteries supply power to the control load and 1 group of storage batteries supply power to the power load. For a power dc system, "1 set of battery dc power supply system," is preferably connected to another set of dc power supply system of the same voltage class via a dc breaker. In normal operation, the circuit breaker should be in an open state. In order to meet the requirements, each machine of the thermal power plant is provided with a group of 220V power special storage battery, a charging device is arranged, and simultaneously, in order to meet the regulations of twenty-five key requirements for preventing electric power production accidents issued by the national energy agency, three charging devices are adopted according to a main control unit of the direct current system for power plant. As shown in fig. 2, in this case, a set of redundant charging devices may be added to each of the #1 unit and the #3 unit, and when the #2 unit is overhauled, power is supplied to the direct current system for power of the #2 unit. In fig. 2, 1 is a #1 unit direct current bus, 2 is a #2 unit direct current bus, 3 is a #3 unit direct current bus, 6 is a #1 unit direct current bus emergency connection switch, 601 is an emergency connection cable, 7 is a #3 unit direct current bus emergency connection switch, 701 is an emergency connection cable, 10 is a #2 unit direct current bus emergency connection switch, 11 is a public interconnection direct current bus, and 12 is an emergency connection switch cabinet.

Under the normal operation condition, the special power direct current systems of the three units independently operate to supply power to the direct current loads of the corresponding units respectively, and bus connecting switches of the direct current systems are in a switching-off state without any connection.

If one of the units is in an overhauling state or fails, the special direct current system loses the power supply capacity to the important direct current load, and a new emergency power supply needs to be found to ensure that the direct current load does not lose the power supply.

As one possible implementation manner, a unit closest to any unit may be taken as a target unit to be interconnected. As shown in fig. 2, since the #2 unit is the unit closest to the #1 unit, the unit can be used as the target unit, so that when the #1 unit is in an overhauling state or fails, an emergency power supply can be obtained from the #2 unit dc bus in consideration of the principle of nearby power supply, that is, the #2 unit dc bus is interconnected with the #1 unit dc bus under the working condition.

Alternatively, the #3 unit may be an alternative target unit, which is not limited herein.

As another possible implementation manner, in response to determining that the unit nearest to any unit is currently in a maintenance state, the unit next nearest to any unit is taken as the target unit to be interconnected. As shown in fig. 2, if the #3 unit dc system fails, emergency power needs to be drawn from the other units. And because the direct current system of the #2 unit is stopped, the #1 unit can be used as a target unit to be interconnected. It should be noted that the target units to be interconnected may be used to provide dc power for any of the units that are malfunctioning.

And 102, respectively performing switching-on operation on the first emergency interconnection switch and the second emergency interconnection switch corresponding to any unit, so that any unit obtains an emergency power supply from a direct current bus of a target unit based on the first emergency interconnection cable connected with the first emergency interconnection switch and the second emergency interconnection cable connected with the second emergency interconnection switch.

Optionally, the first emergency connection switch and the second emergency connection switch are located in the same emergency connection switch cabinet, and the emergency connection switch cabinet includes an emergency connection switch corresponding to each unit in the multi-unit direct current system. As shown in fig. 2, 12 is an emergency connection switch cabinet, which comprises an emergency connection switch 7, an emergency connection switch 6 and an emergency connection switch 10. Therefore, the direct current interconnection switch cabinet bodies of the 1 # and 3 units are reduced by 1 surface respectively, the operation sites of emergency interconnection switches in the #1 and 3 units can be omitted, the operation sites are fixed in the middle unit under emergency conditions, the operation steps are simplified, the operation convenience is greatly improved, the number of interconnection switches is reduced, for example, 6 interconnection switches are usually needed, only 3 connection switches are needed, the consumption of cable channels and cable bridges is reduced due to the reduction of the quantity of cables, the laying construction cost is reduced, the consumption of emergency interconnection cables is only about 25% of the quantity of cables in the prior art, and the cost of the interconnection cables is only about 28% of the cost of the cables in the prior art due to the fact that the consumption of the emergency interconnection cables is comprehensive of factors such as cable pressure drop, cable section and the like.

Optionally, one side of the first emergency connection cable is connected with a direct current bus corresponding to any unit, and one side of the first emergency connection cable is connected with a direct current bus corresponding to the first unit;

one side of the second emergency connection cable is connected with a direct current bus corresponding to the target unit, and one side of the second emergency connection cable is connected with a direct current bus corresponding to the first unit;

the first unit is a unit located in the middle position among the units.

Optionally, the voltage levels of the units are the same, and each unit includes: at least one group of storage batteries and at least one group of charging devices.

In fig. 2, the #1 unit dc bus emergency tie switch 6, the #2 unit dc bus emergency tie switch 10, and the #3 unit dc bus emergency tie switch 7 are all in the open position under the normal operation condition. In emergency, the emergency interconnection is realized by changing the positions of the above 3 switches.

The interconnection method of the direct current bus of the #1 unit and the direct current bus of the #2 unit comprises the following steps: and switching on the #1 unit direct current bus emergency interconnection switch 6, and switching on the #2 unit direct current bus emergency interconnection switch 10.

The interconnection method of the direct current bus 2 of the #2 unit and the direct current bus 3 of the #3 unit comprises the following steps: and switching on the #3 unit direct current bus emergency interconnection switch 7, and switching on the #2 unit direct current bus emergency interconnection switch 10.

The interconnection method of the direct current bus 1 of the #1 unit and the direct current bus 3 of the #3 unit comprises the following steps: and switching on the #1 unit direct current bus emergency interconnection switch 6, and switching on the #3 unit direct current bus emergency interconnection switch 7.

The method flexibly realizes the pairwise interconnection of the three machine direct current buses, saves long cables and matched cable bridges/supports between the direct current buses 1 and 3 of the #1 machine set and the direct current bus 3 of the #3 machine set, reduces the number of connecting switches and cables between adjacent machine sets by half, simplifies the operation flow and saves the emergency operation time.

It should be noted that the method realizes the manual switching of the emergency tie switch according to the current rule specification requirements. Along with the gradual increase of the requirements of users on the reduction and synergy and the automation degree of equipment, the emergency contact switching cabinet 12 in fig. 2 can be disclosed as a microcomputer type switching device, and when a certain section of direct current bus loses electricity through a preset control logic and a computer program, the microcomputer type switching device judges whether to switch and which switch is switched according to input criteria such as a direct current system state, a controlled equipment state and the like, and can output the opening/closing control of the switching switch through preset/non-delay.

When the microcomputer type switching device is adopted, the emergency contact switch is required to be an electric operating mechanism type switch, so that the on-site manual opening/closing operation of the switch or the remote control opening/closing operation can be realized.

Optionally, the microcomputer type switching device can receive remote control instructions sent by operators at a centralized control room, a monitoring background and the like, judge whether a direct current system fails or not through a control program, and whether each emergency contact switch is in an operable state or not through factors such as preset time delay or no time delay, and output to perform switching-off/switching-on control on the switching switch.

Example one: if the #1 unit direct current system breaks down, at this moment, the #1 unit direct current bus 1 loses power, if the direct current load on the bus needs to continue to run, the emergency power supply can be obtained from the #2 unit direct current bus 2 or the #3 unit direct current bus 3, the #2 unit direct current bus 2 and the #1 unit direct current bus 1 are interconnected under the working condition in consideration of the principle of nearby power supply, the device can conduct switching-on operation on the #2 unit direct current bus emergency contact switch 10 and the #1 unit direct current bus emergency contact switch 6 on the emergency contact switch cabinet 12, at this moment, the #1 unit direct current bus 1 obtains the direct current power supply from the #2 unit direct current bus 2 through the contact switches 6 and 10 and the contact cable 601, and emergency contact is successful.

Example two: and the #2 unit is stopped for maintenance, the direct current system is stopped, and at the moment, the direct current system of the #3 unit is in fault, and an emergency power supply needs to be connected from other units. Because the direct current system of the #2 unit is stopped, the system can only be interconnected with the #1 unit, and a power supply is obtained from the direct current bus 1 of the #1 unit.

The device can then carry out the switching-on operation with #1 unit direct current bus emergency tie switch 6, #3 unit direct current bus emergency tie switch 7 on emergent tie switch cabinet 12, and #1 unit direct current bus 1 obtains DC power supply from #3 unit direct current bus 3 through tie switches 6, 7 and tie cables 601, 701 at this moment, and emergent tie is successful.

For the two working conditions, the connecting cables between adjacent units and between non-adjacent units can be used, the normal operation of a direct current system of an intermediate unit is not influenced, the cable quantity and the cable channel are saved, the operation place is solidified, any unit needs emergency interconnection, and the operation can be carried out at the intermediate unit, so that the operation flow is simple and convenient.

In summary, the method is suitable for other industrial projects such as power plants, substations, chemical plants and the like, civil projects and the like, and is suitable for scenes in which three or more sections of direct current/alternating current buses in the projects need to be mutually connected. In addition, the corresponding adjustment can be performed according to different requirements of manual/automatic input, input priority and the like among the multiple sections of alternating current buses.

In the embodiment of the disclosure, firstly, in response to determining that any unit in a multi-unit direct current system is in a fault state at present, a target unit to be interconnected is determined from a plurality of units, and then, switching-on operation is respectively carried out on a first emergency interconnection switch and a second emergency interconnection switch corresponding to the any unit, so that the any unit obtains an emergency power supply from a direct current bus of the target unit based on a first emergency interconnection cable connected with the first emergency interconnection switch and a second emergency interconnection cable connected with the second emergency interconnection switch. Therefore, when a certain unit fails, the direct current system and the standby charging device cannot normally supply power, the emergency connection switch between the direct current buses of the unit can be started, and the emergency connection switch is used for acquiring the direct current power supply from other units in short time so as to solve the needs under emergency conditions.

In order to achieve the above embodiment, the disclosure further provides an emergency interconnection device of the power plant multi-unit direct current system.

Fig. 3 is a block diagram of an emergency interconnection device of a power plant multi-unit dc system according to a third embodiment of the present disclosure.

As shown in fig. 3, the emergency interconnection apparatus 300 of the power plant multi-unit dc system may include:

a determining module 310, configured to determine a target unit to be interconnected from the multiple units in response to determining that any unit in the multiple unit dc system is currently in a fault state;

and the obtaining module 320 is configured to perform a closing operation on the first emergency interconnection switch and the second emergency interconnection switch corresponding to the any one unit, so that the any one unit obtains an emergency power supply from the dc bus of the target unit based on the first emergency interconnection cable connected to the first emergency interconnection switch and the second emergency interconnection cable connected to the second emergency interconnection switch.

Optionally, the determining module is specifically configured to:

taking the unit nearest to any unit as the target unit to be interconnected;

or alternatively, the process may be performed,

and responding to the fact that the unit nearest to any unit is in a maintenance state at present, and taking the unit next nearest to any unit as the target unit to be interconnected.

Optionally, the first emergency interconnection switch and the second emergency interconnection switch are located in the same emergency interconnection switch cabinet, and the emergency interconnection switch cabinet includes an emergency interconnection switch corresponding to each unit in the multi-unit direct current system.

Optionally, one side of the first emergency connection cable is connected with a direct current bus corresponding to any unit, and one side of the first emergency connection cable is connected with a direct current bus corresponding to the first unit;

one side of the second emergency connection cable is connected with a direct current bus corresponding to the target unit, and one side of the second emergency connection cable is connected with a direct current bus corresponding to the first unit;

the first unit is a unit located in the middle position among the units.

Optionally, the voltage levels of the units are the same, and each unit includes: at least one group of storage batteries and at least one group of charging devices.

In the embodiment of the disclosure, firstly, in response to determining that any unit in a multi-unit direct current system is in a fault state at present, a target unit to be interconnected is determined from a plurality of units, and then, switching-on operation is respectively carried out on a first emergency interconnection switch and a second emergency interconnection switch corresponding to the any unit, so that the any unit obtains an emergency power supply from a direct current bus of the target unit based on a first emergency interconnection cable connected with the first emergency interconnection switch and a second emergency interconnection cable connected with the second emergency interconnection switch. Therefore, when a certain unit fails, the direct current system and the standby charging device cannot normally supply power, the emergency connection switch between the direct current buses of the unit can be started, and the emergency connection switch is used for acquiring the direct current power supply from other units in short time so as to solve the needs under emergency conditions.

To achieve the above embodiments, the present disclosure further proposes a computer device including: the microcomputer type emergency interconnection device can realize automatic switching and/or remote control switching of personnel in a centralized control room (monitoring room) when the processor executes the program, and the emergency interconnection method of the power plant multi-unit direct current system provided by the embodiment of the disclosure is realized.

In order to implement the above embodiments, the disclosure further proposes a non-transitory computer readable storage medium storing a computer program, which when executed by a processor implements an emergency interconnection method of a power plant multi-unit dc system as proposed in the foregoing embodiments of the disclosure.

Fig. 4 illustrates a block diagram of an exemplary computer device suitable for use in implementing embodiments of the present disclosure. The computer device 12 shown in fig. 4 is merely an example and should not be construed as limiting the functionality and scope of use of the disclosed embodiments.

As shown in FIG. 4, the computer device 12 is in the form of a general purpose computing device. Components of computer device 12 may include, but are not limited to: one or more processors or processing units 16, a system memory 28, a bus 18 that connects the various system components, including the system memory 28 and the processing units 16.

Bus 18 represents one or more of several types of bus structures, including a memory bus or memory controller, a peripheral bus, an accelerated graphics port, a processor, and a local bus using any of a variety of bus architectures. By way of example, and not limitation, such architectures include industry Standard architecture (Industry Standard Architecture; hereinafter ISA) bus, micro channel architecture (Micro Channel Architecture; hereinafter MAC) bus, enhanced ISA bus, video electronics standards Association (Video Electronics Standards Association; hereinafter VESA) local bus, and peripheral component interconnect (Peripheral Component Interconnection; hereinafter PCI) bus.

Computer device 12 typically includes a variety of computer system readable media. Such media can be any available media that is accessible by computer device 12 and includes both volatile and nonvolatile media, removable and non-removable media.

Memory 28 may include computer system readable media in the form of volatile memory, such as random access memory (Random Access Memory; hereinafter: RAM) 30 and/or cache memory 32. The computer device 12 may further include other removable/non-removable, volatile/nonvolatile computer system storage media. By way of example only, storage system 34 may be used to read from or write to non-removable, nonvolatile magnetic media (not shown in FIG. 4, commonly referred to as a "hard disk drive"). Although not shown in fig. 4, a magnetic disk drive for reading from and writing to a removable non-volatile magnetic disk (e.g., a "floppy disk"), and an optical disk drive for reading from or writing to a removable non-volatile optical disk (e.g., a compact disk read only memory (Compact Disc Read Only Memory; hereinafter CD-ROM), digital versatile read only optical disk (Digital Video Disc Read Only Memory; hereinafter DVD-ROM), or other optical media) may be provided. In such cases, each drive may be coupled to bus 18 through one or more data medium interfaces. Memory 28 may include at least one program product having a set (e.g., at least one) of program modules configured to carry out the functions of the various embodiments of the disclosure.

A program/utility 40 having a set (at least one) of program modules 42 may be stored in, for example, memory 28, such program modules 42 including, but not limited to, an operating system, one or more application programs, other program modules, and program data, each or some combination of which may include an implementation of a network environment. Program modules 42 generally perform the functions and/or methods in the embodiments described in this disclosure.

The computer device 12 may also communicate with one or more external devices 14 (e.g., keyboard, pointing device, display 24, etc.), one or more devices that enable a user to interact with the computer device 12, and/or any devices (e.g., network card, modem, etc.) that enable the computer device 12 to communicate with one or more other computing devices. Such communication may occur through an input/output (I/O) interface 22. Moreover, the computer device 12 may also communicate with one or more networks such as a local area network (Local Area Network; hereinafter LAN), a wide area network (Wide Area Network; hereinafter WAN) and/or a public network such as the Internet via the network adapter 20. As shown, network adapter 20 communicates with other modules of computer device 12 via bus 18. It should be appreciated that although not shown, other hardware and/or software modules may be used in connection with computer device 12, including, but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, data backup storage systems, and the like.

The processing unit 16 executes various functional applications and data processing by running programs stored in the system memory 28, for example, implementing the methods mentioned in the foregoing embodiments.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present disclosure, the meaning of "a plurality" is at least two, such as two, three, etc., unless explicitly specified otherwise.

Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and additional implementations are included within the scope of the preferred embodiment of the present disclosure in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present disclosure.

Logic and/or steps represented in the flowcharts or otherwise described herein, e.g., a ordered listing of executable instructions for implementing logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). In addition, the computer readable medium may even be paper or other suitable medium on which the program is printed, as the program may be electronically captured, via, for instance, optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner, if necessary, and then stored in a computer memory.

It should be understood that portions of the present disclosure may be implemented in hardware, software, firmware, or a combination thereof. In the above-described embodiments, the various steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. As with the other embodiments, if implemented in hardware, may be implemented using any one or combination of the following techniques, as is well known in the art: discrete logic circuits having logic gates for implementing logic functions on data signals, application specific integrated circuits having suitable combinational logic gates, programmable Gate Arrays (PGAs), field Programmable Gate Arrays (FPGAs), and the like.

Those of ordinary skill in the art will appreciate that all or a portion of the steps carried out in the method of the above-described embodiments may be implemented by a program to instruct related hardware, where the program may be stored in a computer readable storage medium, and where the program, when executed, includes one or a combination of the steps of the method embodiments.

Furthermore, each functional unit in the embodiments of the present disclosure may be integrated in one processing module, or each unit may exist alone physically, or two or more units may be integrated in one module. The integrated modules may be implemented in hardware or in software functional modules. The integrated modules may also be stored in a computer readable storage medium if implemented in the form of software functional modules and sold or used as a stand-alone product.

The above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, or the like. Although embodiments of the present disclosure have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the present disclosure, and that variations, modifications, alternatives, and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the present disclosure.

Claims (10)

1. An emergency interconnection method for a multi-unit direct current system of a power plant is characterized by comprising the following steps:

in response to determining that any one of the multiple units of the direct current system is currently in a fault state, determining a target unit to be interconnected from the multiple units;

and respectively performing switching-on operation on the first emergency interconnection switch and the second emergency interconnection switch corresponding to any unit so that any unit obtains an emergency power supply from a direct current bus of the target unit based on the first emergency interconnection cable connected with the first emergency interconnection switch and the second emergency interconnection cable connected with the second emergency interconnection switch.

2. The method of claim 1, wherein the determining a target unit to be interconnected from a plurality of units comprises:

taking the unit nearest to any unit as the target unit to be interconnected;

or alternatively, the process may be performed,

and responding to the fact that the unit nearest to any unit is in a maintenance state at present, and taking the unit next nearest to any unit as the target unit to be interconnected.

3. The method of claim 1, wherein the step of determining the position of the probe comprises,

the first emergency connection switch and the second emergency connection switch are located in the same emergency connection switch cabinet, and the emergency connection switch cabinet comprises emergency connection switches corresponding to each unit in the multi-unit direct current system.

4. The method of claim 1, wherein the step of determining the position of the probe comprises,

one side of the first emergency connecting cable is connected with a direct current bus corresponding to any unit, and one side of the first emergency connecting cable is connected with a direct current bus corresponding to the first unit;

one side of the second emergency connection cable is connected with a direct current bus corresponding to the target unit, and one side of the second emergency connection cable is connected with a direct current bus corresponding to the first unit;

the first unit is a unit located in the middle position among the units.

5. The method of claim 1, wherein the step of determining the position of the probe comprises,

the voltage levels of the units are the same, and each unit comprises: at least one group of storage batteries and at least one group of charging devices.

6. An emergency interconnection device for a multi-unit direct current system of a power plant, comprising:

the determining module is used for determining a target unit to be interconnected from the multiple units in response to determining that any unit in the multi-unit direct current system is in a fault state at present;

the acquisition module is used for respectively carrying out closing operation on the first emergency interconnection switch and the second emergency interconnection switch corresponding to any unit so that any unit can acquire an emergency power supply from a direct current bus of the target unit based on the first emergency interconnection cable connected with the first emergency interconnection switch and the second emergency interconnection cable connected with the second emergency interconnection switch.

7. The apparatus according to claim 6, wherein the determining module is specifically configured to:

taking the unit nearest to any unit as the target unit to be interconnected;

or alternatively, the process may be performed,

and responding to the fact that the unit nearest to any unit is in a maintenance state at present, and taking the unit next nearest to any unit as the target unit to be interconnected.

8. The apparatus of claim 6, wherein,

the first emergency connection switch and the second emergency connection switch are located in the same emergency connection switch cabinet, and the emergency connection switch cabinet comprises emergency connection switches corresponding to each unit in the multi-unit direct current system.

9. The apparatus of claim 6, wherein,

one side of the first emergency connecting cable is connected with a direct current bus corresponding to any unit, and one side of the first emergency connecting cable is connected with a direct current bus corresponding to the first unit;

one side of the second emergency connection cable is connected with a direct current bus corresponding to the target unit, and one side of the second emergency connection cable is connected with a direct current bus corresponding to the first unit;

the first unit is a unit located in the middle position among the units.

10. The apparatus of claim 6, wherein,

the voltage levels of the units are the same, and each unit comprises: at least one group of storage batteries and at least one group of charging devices.

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