A method for realizing reliable power supply of multi-power sources and multi-bus ties

Abstract

This invention provides a method for achieving reliable power supply from multiple power sources and multiple bus connections, comprising the following steps: In the initialization phase, reading the topology diagram of the target system to determine the configuration parameters and system layout corresponding to the target system; determining the power supply locations, load locations, and bus connection locations in the target system based on the system layout; in the power supply phase, reading the identifiers of each target load and determining the optimal power supply control method for each target load according to its load priority; determining whether there is a conflict between the optimal power supply control methods of each target load; if a conflict exists, determining the optimal power supply control method corresponding to the target load with the lower load priority as an invalid power supply control method; if no conflict exists, determining the optimal power supply control method for each target load as an effective power supply control method, thereby achieving reliable power supply from multiple power sources and multiple bus connections.

Description

Technical Field

[0001] This invention relates to the field of power management technology, and more specifically, to a method for achieving reliable power supply from multiple power sources and multiple bus connections. Background Technology

[0002] Currently, most large domestic petrochemical and metallurgical enterprises typically employ a multi-source power supply system with automatic transfer switches (ATS) to provide backup power for short-term power outages. However, with the widespread use of vacuum circuit breakers and fast switches such as SF6, and the continuous increase in enterprise load capacity, multi-source, multi-bus interconnection power supply systems are becoming increasingly common.

[0003] Currently, existing multi-power supply and multi-bus tie power supply methods typically use dedicated multi-function transfer switches. Before purchasing these switches, it's necessary to know the specific application of each load on-site and create a truth table for the switching of each power switch and bus tie switch. During power supply, the truth table is consulted to control which power supply is closed and which bus tie is connected to supply power to the corresponding load. For example, when power supply S1 is normal and power supplies S2 and S3 are abnormal, the switch on power supply S1 is closed, the switch on power supply S2 is open, the switch on power supply S3 is open, bus tie 1 is closed, and bus tie 2 is open, supplying power to loads LOAD1 and LOAD2. When power supply S1 is abnormal, power supply S2 is abnormal, and S3 (emergency power supply) is normal, the switch on power supply S1 is open, the switch on power supply S2 is open, the switch on power supply S3 is closed, bus tie 1 is open, and bus tie 2 is open, supplying power only to load LOAD3.

[0004] However, existing multi-function changeover switches contain PLC controllers, which are expensive, bulky, and heavy. When a multi-function changeover switch project is designed, the approximate topology and switching truth table are already determined. Before being put into use, the multi-function changeover switch usually needs to be tested. The tests include testing the performance of the switch itself, and after the switch is connected to the control system, the entire control system is tested. Only after passing the tests can it be officially put into use. If the tests fail, the entire control system, including the multi-function changeover switch, needs to be adjusted and modified to achieve the goal of passing the tests, which causes debugging inconvenience.

[0005] There are application scenarios where, during the construction phase of factories or industrial enterprises, multiple temporary construction power supplies are typically introduced. The reliability of construction power is generally limited, and the load on each power supply line changes with the external power supply situation. Overall, the power supply lines and the load supplied are prone to variation and instability. Similarly, during the factory construction and equipment commissioning phases, the use of construction machinery and installation equipment also changes. However, since the topology and truth table of the multi-function transfer switch are already determined, any modifications to the power supply switch or bus tie switch position on the power supply line, or adjustments to the load power supply, require returning to the original manufacturer for redesign and truth table import, thus reducing the user experience.

[0006] Furthermore, different projects correspond to different topologies, requiring the design of different switching truth tables. When there are a large number of electrical devices, the workload is enormous, which will delay the design cycle of the entire project and seriously affect work efficiency.

[0007] In order to solve the above problems, people have been seeking an ideal technological solution. Summary of the Invention

[0008] The purpose of this invention is to address the shortcomings of existing technologies by providing a method for achieving reliable power supply from multiple power sources and multiple bus connections.

[0009] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0010] The first aspect of this invention provides a method for achieving reliable power supply from multiple power sources and multiple bus connections, the method comprising the following steps:

[0011] During the initialization phase: the topology diagram of the target system is read, and the configuration parameters and system layout corresponding to the target system are determined; wherein, the configuration parameters corresponding to the target system include the number of power supplies n and power supply identifiers in the target system, as well as the pre-configured load capacity and power priority of each power supply, the number of loads w connected to the target system and the target load identifier, as well as the pre-configured load power parameters and load priority, and the number of bus tie switches m, the bus tie switch identifier and the power supply switch identifier;

[0012] Based on the system layout corresponding to the target system, determine the location of the power supply, load, and bus tie switch in the target system, as well as the connection relationship between the power supply, load, and bus tie switch.

[0013] In the target system, the number of power supplies is equal to the number of power switches. The i-th power switch is used to control whether the i-th power supply participates in the load power supply. The bus tie switch is set between the i-th power switch and the k-th power switch and is used to control whether the i-th power supply and the k-th power supply participate in the load power supply at the same time.

[0014] During the power supply phase: Read the identifiers of each target load and the power supply status detection results. Based on the configuration parameters corresponding to the target system, the power supply layout location, load layout location and bus tie switch layout location in the target system, as well as the connection relationship between the power supply, load and bus tie switch, determine the optimal power supply control method for each target load in sequence.

[0015] Determine if there is a conflict between the optimal power supply control methods for each target load. If a conflict exists, the optimal power supply control method for the target load with lower load priority is determined to be an invalid power supply control method. If there is no conflict, the optimal power supply control method for each target load is determined to be a valid power supply control method.

[0016] A second aspect of the present invention provides a readable storage medium having instructions stored thereon that, when executed by a processor, implement the steps of the method for implementing reliable power supply to multiple power sources and multiple bus connections as described above.

[0017] The beneficial effects of this invention are as follows:

[0018] 1) This invention proposes a method for achieving reliable power supply from multiple power sources and multiple bus connections. It is a general power supply control method. Before purchasing, there is no need to know the specific power supply usage of the entire power supply system, nor is there a need to pre-store numerous switching truth tables under different projects. It can automatically output the optimal power supply control mode for multiple topology diagrams. During the power supply process, reliable power supply is carried out based on the output optimal power supply control mode. It has stronger versatility and a wider range of applications.

[0019] 2) When upgrading the topology of an existing system by temporarily changing the power supply strategy, such as adding power supply lines or changing load priorities, there is no need to return to the original factory for redesign and import truth tables. The method of realizing reliable power supply of multiple power sources and multiple bus connections according to the present invention updates and reinitializes the number of bus connection switches m, bus connection switch identifier, number of power supply switches and power supply switch identifier in the configuration parameters, which can meet the actual needs of users, greatly shorten the project upgrade and transformation cycle, and ensure reliable power supply of multiple power sources and multiple bus connections.

[0020] 3) When the load capacity of the power supply changes, this invention updates and reinitializes the load capacity of the power supply in the configuration parameters to ensure reliable power supply without having to return to the original manufacturer for redesign and truth table import; therefore, this invention is applicable to application scenarios where the load capacity of the power supply changes.

[0021] 4) For application scenarios where the power supply is often unstable, this invention can ensure reliable power supply by updating and re-initializing the load priority and other configuration parameters, without having to return to the original manufacturer for redesign and truth table import; therefore, this invention can effectively ensure power supply reliability. Attached Figure Description

[0022] Figure 1 This is a flowchart illustrating the method for achieving reliable power supply from multiple power sources and multiple bus connections according to the present invention.

[0023] Figure 2 This is a flowchart illustrating the optimal power supply control method for generating the target load according to the present invention;

[0024] Figures 3(a) to 3(c) are schematic diagrams of the target system topology in the first specific embodiment of the present invention;

[0025] Figures 4(a) and 4(b) are schematic diagrams of the target system topology in the second specific embodiment of the present invention;

[0026] Figures 5(a) and 5(b) are schematic diagrams of the target system topology in the third specific embodiment of the present invention. Detailed Implementation

[0027] The technical solution of the present invention will be further described in detail below through specific embodiments.

[0028] The bus tie switch, also known as the bus tie switch, is a switch that connects the busbars (the conductors between the transformer and each distribution switch).

[0029] A topology diagram refers to the abstraction of power supply sources, power switches, bus tie switches, loads, etc. in a power supply system into nodes that are independent of their physical form, and the power lines between these nodes are abstracted into lines, thus representing the relationships between these nodes in the form of a topology diagram.

[0030] Example 1

[0031] Appendix Figure 1 A flowchart of a method for achieving reliable power supply from multiple power sources and multiple bus connections is shown, the method comprising the following steps:

[0032] In the initialization stage: Read the topology diagram of the target system, and determine the configuration parameters and system layout corresponding to the target system; wherein, the configuration parameters corresponding to the target system include the number n of power supply sources in the target system and the power supply source identifiers, as well as the load capacity and power supply priority of each pre-configured power supply source, and the number w of loads connected to the target system and the target load identifiers, as well as the pre-configured load power parameters and load priorities, and the number m of bus tie switches, bus tie switch identifiers and power supply switch identifiers;

[0033] According to the system layout corresponding to the target system, determine the layout positions of the power supply sources, loads and bus tie switches in the target system, as well as the connection relationships among the power supply sources, loads and bus tie switches;

[0034] Among them, the number of power supply sources in the target system is equal to the number of power supply switches, and the i-th power supply switch is used to control whether the i-th power supply source supplies power to the participating loads; the bus tie switch is set between the i-th power supply switch and the k-th power supply switch, and is used to control whether the i-th power supply source and the k-th power supply source supply power to the loads simultaneously;

[0035] In the power supply stage: Read the identification of each target load and the detection result of the power supply source status, and successively determine the optimal power supply control mode for each target load according to the configuration parameters corresponding to the target system, the layout positions of the power supply sources, loads and bus tie switches in the target system, and the connection relationships among the power supply sources, loads and bus tie switches;

[0036] Determine whether there is a conflict among the optimal power supply control modes of each target load. If there is a conflict, determine the optimal power supply control mode corresponding to the target load with a lower load priority as an invalid power supply control mode. If there is no conflict, determine the optimal power supply control modes of each target load as valid power supply control modes.

[0037] Among them, the system layout can be expressed as: 2S-T, 3S-T, 3S-2T......, nS-mT, where m < n, n represents the number of power supply sources, and m represents the number of bus tie switches;

[0038] The power supply source identifiers can be expressed as S1, S2, S3,......, Sn, and the power supply priorities can be expressed as P1, P2, P3,......, Pn; the target load identifiers can be expressed as LOAD1, LOAD2, LOAD3, ……, LOADw, and the load priorities arranged in descending order can be expressed as L1, L2, L3,......, Lw;

[0039] The bus tie switch identifier can be represented as QTIE1, QTIE2, QTIE3, ..., QTIEm, and the power supply switch identifier can be represented as QS1, QS2, QS3, ..., QSn.

[0040] It is understood that a topology diagram already exists prior to the power matching of the present invention. The topology diagram of the target system includes, but is not limited to, the topology diagrams shown in Figures 3(a) to 3(c), 4(a) and 4(b), and 5(a) and 5(b).

[0041] The switches in the topology diagram use common circuit breakers, without the need for multi-functional customization; first connect the power supply, power switch, bus tie switch and load, and ensure power supply reliability through the opening and closing control of the power switch and bus tie switch; the power supply system corresponding to the topology diagram has flexible wiring and is easy to debug, and this invention can automatically output the optimal control type.

[0042] It should be noted that the power supply priority and the load priority are pre-configured manually during the initialization phase before the system starts working. When determining the optimal power supply control method for each target load, there may be multiple power supplies with the required load capacity. In this case, the pre-configured power supply priority comes into play, and among the multiple power supplies with the required load capacity, the power supply with the highest power priority is selected to power on.

[0043] It can be understood that the optimal power supply control method for the target load refers to determining the load power supply of the target load, determining the opening and closing status of each power supply switch, determining the opening and closing status of each bus tie switch, and thus forming the power supply line for the target load.

[0044] When checking whether the power supply capacity meets the load requirements, there may be situations where the optimal power supply control method for different target loads needs to share a bus. However, the power supply lines for different target loads on the shared bus may have inconsistent bus voltage or bus current directions, which may lead to conflicts between the optimal power supply control methods for the target loads.

[0045] Therefore, when determining whether there is a conflict between the optimal power supply control methods for each target load, the following steps are performed:

[0046] Read the bus tie switch identifier in the optimal power supply control method for each target load, and determine whether there is an identical bus tie switch identifier among two or more optimal power supply control methods for target loads.

[0047] If the same bus tie switch identification exists, it indicates that the optimal power supply control methods for different target loads share the same bus. Further, it is determined whether the signal transmission direction (bus voltage direction or bus current direction) on the line corresponding to the same bus tie switch identification is opposite. If so, it is determined that there is a conflict between the optimal power supply control methods for these target loads.

[0048] If there are no identical bus tie switch identifiers, or if the signal transmission direction (bus voltage direction or bus current direction) on the line corresponding to the identical bus tie switch identifiers is the same, then it is determined that there is no conflict between the optimal power supply control methods for each target load.

[0049] In summary, this embodiment provides a more versatile method for achieving reliable power supply from multiple power sources and multiple bus connections. It eliminates the need to know the specific application of each load on site in advance, as well as the need to create truth tables for each power switch and bus connection switch, and the need to pre-store numerous truth tables for different projects. During the power supply process, it eliminates the need to control which power source is switched on by looking up truth tables. The connection of the bus connection supplies power to the corresponding load, and it can automatically output the optimal power supply control mode.

[0050] Therefore, the method for achieving reliable power supply from multiple power sources and multiple bus connections proposed in this embodiment is a power supply control method applicable to various topology diagrams. It can also achieve reliable power supply from multiple power sources and multiple bus connections in scenarios where the power supply situation is often unstable or the load capacity of the power supply changes. When there are many loads (electrical devices), it is not necessary to pre-design different switching truth tables for different projects, which makes the workload of the entire project design relatively small, effectively shortens the design cycle of the entire project, and thus greatly improves work efficiency.

[0051] Example 2

[0052] Based on Example 1, this example provides a specific implementation method for achieving reliable power supply from multiple power sources and multiple bus connections, as shown in the attached figure. Figure 2 As shown;

[0053] During the power supply phase: Read the identifiers of each target load and the power supply status detection results. Based on the configuration parameters corresponding to the target system, the power supply layout location, load layout location, and bus tie switch layout location within the target system, as well as the connection relationships between the power supply, load, and bus tie switch, determine the optimal power supply control method for each target load in sequence, and then execute:

[0054] Step 0: Select the load with the highest load priority as the first target load;

[0055] Step 101: Determine the power supply requirements of the first target load; wherein, the power supply requirements of the first target load refer to the rated power (load capacity) and load priority of the first target load;

[0056] Step 102: Determine whether the load capacity of each power supply meets the power supply requirements of the first target load according to the power supply priority. The load capacity of the power supply refers to the output power of the power supply.

[0057] If the Xth power supply meets the power supply requirements of the first target load (the output power of the Xth power supply ≥ the rated power of the first target load) and (derived from the power supply status detection result) the Xth power supply is in a normal state, then the Xth power supply is used as the load power supply, and the power supply switch corresponding to the load power supply is used as a type I switch, generating the optimal power supply control mode I for the first target load; when executing the optimal power supply control mode I, the Xth power supply switch (type I switch) is adjusted to the closed state, and the bus tie switch between the Xth power supply switch and the first target load is adjusted to the closed state; where 1≤X≤n;

[0058] If the Xth power supply meets the power supply requirements of the first target load and (derived from the power supply status detection result) the Xth power supply is in an abnormal state, or no power supply that meets the power supply requirements of the first target load is found, then proceed to step 103.

[0059] Step 103: Randomly select R power supplies from the n power supplies to form a power supply combination, calculate the sum of the power of each power supply combination, and arrange the power supply combinations in ascending order to obtain the power supply combination U. R-1 U R-2 , ......, U R-((n(n-1)) / 2) And determine whether each power supply combination in turn meets the power supply requirements of the first target load (the sum of the output power of the two power supplies is greater than or equal to the rated power of the first target load); where R=2 (the initial value of R is 2);

[0060] Step 104: If the power supply combination UR-Y meets the power supply requirements of the first target load and all power supplies in the power supply combination UR-Y are in normal condition, then the optimal power supply control mode II for the first target load is generated.

[0061] When executing the optimal power supply control mode II, the two power supply switches corresponding to the two power supply sources in the power supply combination UR-Y are adjusted to the closed state, and the bus tie switch between these two power supply switches and the first target load is adjusted to the closed state; where 1≤Y≤(n(n-1)) / 2;

[0062] Step 105: If no power supply combination that meets the power supply requirements of the first target load is found, or if there is an abnormal power supply in the power supply combination UR-Y, then R=R+1 and continue to execute steps 103 and 104 until the required power supply combination is found or R is greater than the preset value (n(n-1)) / 2.

[0063] The power supply status detection result refers to whether each power supply in the target system is in an abnormal state or a normal state. It can be understood that when detecting the power supply status, those skilled in the art usually detect the power supply status based on the comparison results of the real-time collected voltage parameters (or current parameters) with the normal values. This embodiment will not elaborate further.

[0064] In addition, the optimal power supply control method I corresponds to an application scenario in which one power supply is used as the load power supply to power the target load, while the optimal power supply control method II corresponds to an application scenario in which two or more power supplies are used as the load power supply to power the target load.

[0065] The location of the power supply in the target system refers to the position of the node in the topology diagram, which is abstracted as a node unrelated to the actual shape of the power supply; the location of the load refers to the position of the node in the topology diagram, which is abstracted as a node unrelated to the actual shape of the load; the location of the bus tie switch refers to the position of the node in the topology diagram, which is abstracted as a node unrelated to the actual shape of the bus tie switch.

[0066] Correspondingly, the connection relationship between the power supply, load and bus tie switch refers to the power lines located between these nodes and abstracted as lines when the power supply, power supply switch, bus tie switch, load and other components are abstracted into nodes that are independent of their shape.

[0067] It can be understood that after obtaining the optimal power supply control method corresponding to the load with the highest load priority, the load with the second highest load priority is taken as the second target load, and steps 101 to 104 are repeated to generate the optimal power supply control method for the second target load. The specific process will not be described in detail here. This process continues until the optimal power supply control method for the wth target load is obtained.

[0068] In one specific implementation, it is pre-configured that: power supply 1 has the highest power priority, power supply 2 has the next highest power priority, and so on.

[0069] First, determine whether the power supply line 1 meets the requirements of the first target load, i.e., determine whether the output power of the power supply line 1 is greater than or equal to the rated power of the first target load: according to the power supply priority order P1, P2 to Pn, check whether the load capacity of the power supply meets the requirements. When the output power of power supply line X Sx is found to be greater than or equal to the rated power of the first target load, power supply line X Sx is selected as the load power supply, and the power supply switch QSx is closed to supply power. If no power supply that meets the requirements is found, calculate whether the two groups of power supplies meet the requirements. Randomly select two groups from the n groups of power supplies and combine them. Arrange all the combined power supplies in ascending order of rated power, in the order of U1, U2, U3, ...

[0070] The system sequentially checks whether the power supply capacity meets the requirements. When Ux is found to meet the requirements, the x-combination power supply is selected as the power supply to be supplied with the load, and power supply switches QSx1 and QSx2 are closed to supply power. If no power supply combination that meets the requirements is found, the system calculates whether the three power supply combinations meet the requirements, and so on, until the required power supply combination is found.

[0071] It is understandable that after generating the optimal power supply control mode I or optimal power supply control mode II for each target load, if the number of target loads is greater than 1, the opening and closing sequence of the power supply switch and the bus tie switch will be determined according to the load priority. It should be noted that for the optimal power supply control mode of a load, there may be more than one switch that needs to perform opening and closing actions. In actual operation, the default principle of opening first and then closing, and closing the nearest switch will be used.

[0072] Example 3

[0073] Based on the above embodiments, this embodiment provides another specific implementation method for achieving reliable power supply from multiple power sources and multiple bus connections;

[0074] Furthermore, after generating the optimal power supply control mode I or optimal power supply control mode II for each target load, it is also determined whether the corresponding power supply switch and bus tie switch in the optimal power supply control mode I or optimal power supply control mode II for each target load are activated based on the current status of the power supply switch and bus tie switch.

[0075] Based on the current state of the power supply switch and the corresponding bus tie switch, determine whether the corresponding power supply switch and bus tie switch in the optimal power supply control mode I or optimal power supply control mode II for each target load need to be activated, and then execute:

[0076] If the current state of the corresponding power supply switch in the optimal power supply control mode I or optimal power supply control mode II for each target load is inconsistent with the target state, a closing command is generated to control the corresponding power supply switch to operate; otherwise, the corresponding power supply switch does not operate. The target state of the power supply switch is the closed state.

[0077] If the current state of the corresponding bus tie switch in optimal power supply control mode I or optimal power supply control mode II is inconsistent with the target state, a closing command is generated to control the corresponding bus tie switch to operate; otherwise, the bus tie switch should not operate. The target state of the bus tie switch is the closed state.

[0078] It should be noted that if the state of the power supply switch is consistent with the current state after the corresponding power supply switch in the optimal power supply control mode I or optimal power supply control mode II of the target load performs the closing action, then the power supply switch does not need to be operated; if the state of the power supply switch is inconsistent with the current state after the closing action is performed, a closing command for the corresponding power supply switch is generated, and the closing action of the power supply switch is performed after the pre-switching delay ends; after the closing action of the power supply switch is performed, a delay after the switching of the power supply switch is completed is added, and after the delay after the switching is completed ends, the open / closed state of the corresponding power supply switch is checked again.

[0079] If the bus tie switch status is consistent with the current status after the corresponding bus tie switch performs the closing action in the optimal power supply control mode I or optimal power supply control mode II for the target load, then the bus tie switch does not need to be operated; if the bus tie switch status is inconsistent with the current status after the closing action is performed, then a command to close the corresponding bus tie switch is issued, and the bus tie switch closing action is performed after the pre-switching delay ends; after the bus tie switch closing action is performed, a delay is added after the bus tie switch switching is completed, and the opening and closing status of the corresponding bus tie switch is checked again after the delay after the switching is completed.

[0080] It is understandable that in the optimal power supply control mode I or optimal power supply control mode II for each target load, more than one switch (power supply switch or bus tie switch) may need to perform opening / closing. Therefore, optimal power supply control mode I or optimal power supply control mode II may involve the operation of multiple switches. After one switch action is completed, the feedback end (controller) is notified, and then the action of the second switch is analyzed. The process continues in a loop until all the switch operations in optimal power supply control mode I or optimal power supply control mode II are completed.

[0081] It should be noted that if the power switch status detected again after the delay following the switchover is consistent with the target status, the power switch will be locked and will not be activated again; if the power switch status is inconsistent with the target status, the power switch will be allowed to activate again.

[0082] Specifically, after executing the optimal power supply control mode I or optimal power supply control mode II for each target load, it is also determined whether the current state of the corresponding power supply switch and bus tie switch in optimal power supply control mode I or optimal power supply control mode II is consistent with the target state;

[0083] If there is a discrepancy, the entire action process is unlocked, allowing the corresponding power supply switch and bus tie switch to operate again. After the operation is completed, the lock is engaged and no further operation is performed (locking refers to locking the control logic, maintaining only the current state, and no longer outputting other control).

[0084] If they match, the circuit breaker will be locked after the operation is completed, and the corresponding power supply switch and bus tie switch will not be allowed to operate again.

[0085] Example 4

[0086] It should be noted that the power supply status is monitored in real time. In practical applications, the load-carrying capacity of the power supply may change, such as mains power outages or generator failures. Therefore, based on the above embodiments, this embodiment provides another specific implementation method for achieving reliable power supply from multiple power sources and multiple bus connections.

[0087] Furthermore, during the execution of the optimal power supply control mode I or optimal power supply control mode II for each target load, it is also determined whether the power supply corresponding to optimal power supply control mode I or optimal power supply control mode II is abnormal. If so, the current action is stopped, the target system is restored to its initial state, and the optimal power supply control mode I or optimal power supply control mode II for the corresponding target load is re-determined.

[0088] Furthermore, during the execution of the optimal power supply control mode I or optimal power supply control mode II for each target load, it is also determined whether there is a closing / opening fault in the power supply switch or bus tie switch corresponding to the optimal power supply control mode I or optimal power supply control mode II. If so, the current action is stopped, the target system is restored to its initial state, and the optimal power supply control mode I or optimal power supply control mode II for the corresponding target load is re-determined.

[0089] It should be noted that this embodiment can handle emergencies such as temporary abnormalities of the selected load power supply, or temporary closing / opening failures of the power supply switch or bus tie switch, thereby further improving the reliability of multi-power supply and multi-bus tie power supply.

[0090] Furthermore, after executing the optimal power supply control mode I or optimal power supply control mode II for each target load, it is also determined whether there is a closing failure record for the power supply switch or bus tie switch corresponding to the optimal power supply control mode I or optimal power supply control mode II. If so, the optimal power supply control mode I or optimal power supply control mode II for the target load is determined to be invalid, thereby discarding the optimal power supply control mode I or optimal power supply control mode II that may affect the reliability of multi-power supply and multi-bus tie power supply, and improving the stability of multi-power supply and multi-bus tie power supply.

[0091] Example 5

[0092] It should be noted that, since the target system may have a bus tie power supply setting or a self-reset setting, this embodiment provides another specific implementation method for achieving reliable power supply from multiple power sources and multiple bus ties, based on the above embodiments.

[0093] Furthermore, after generating the optimal power supply control mode I or optimal power supply control mode II for each target load, the effectiveness of the optimal power supply control mode I or optimal power supply control mode II is determined based on the bus tie power supply setting information of the target system; wherein, the bus tie power supply setting information includes the specific state of each bus tie switch;

[0094] Based on the bus power supply configuration information of the target system, if it is determined whether the optimal power supply control mode I or the optimal power supply control mode II is effective, then execute:

[0095] Read the target state of the bus tie switch in the optimal power supply control mode I or the optimal power supply control mode II, and determine whether there is a conflict between the target state of the bus tie switch and the specific state of each bus tie switch;

[0096] If there is no conflict, the optimal power supply control method I or the optimal power supply control method II for the target load is determined to be valid, and low-priority loads are allowed to not be guaranteed power supply under special circumstances; otherwise, the optimal power supply control method I or the optimal power supply control method II for the target load is determined to be invalid.

[0097] Specifically, the specific state of the bus tie switch refers to the state of the bus tie switch under a specific scenario, where the specific scenario is the power supply line of the pre-installed equipment in the target system.

[0098] Taking Figure 3(b) as an example, assuming that the target system is pre-configured so that each power supply can supply power to a maximum of two loads at the same time, the specific state of bus tie switch QTIE1 and the specific state of bus tie switch QTIE2 means that bus tie switch QTIE1 and bus tie switch QTIE2 will not be in the closed state at the same time.

[0099] For example, when power supply S1 is normal, power supply S2 and S3 are abnormal, and the target load LOAD1 and target load LOAD2 have higher load priority, although the output power of power supply S1 is greater than or equal to the rated power of target load LOAD3, there is a conflict between the target state of bus tie switch QTIE1 and the specific state of bus tie switch QTIE1, and between the target state of bus tie switch QTIE2 and the specific state of bus tie switch QTIE2 in the optimal power supply control mode I for target load LOAD3. Therefore, the optimal power supply control mode I for target load LOAD3 is invalid at this time, and power is temporarily not supplied to target load LOAD3.

[0100] Taking Figure 4(b) as an example, assuming that the target system is pre-configured to allow power supply S1 or S2 to supply power to two loads simultaneously, and power supply S3 to supply power only to the priority load LOAD2, then the specific state of bus tie switch QTIE1 refers to the fact that when power supply switch QS3 is closed, bus tie switch QTIE1 is in the open state.

[0101] For example, if power supply S1 and S2 are abnormal, power supply S3 is normal, and the target load LOAD2 has a higher load priority, although the output power of power supply S3 is greater than or equal to the rated power of target load LOAD1, the target state of bus tie switch QTIE1 in the optimal power supply control mode I for target load LOAD1 conflicts with the specific state of bus tie switch QTIE1; therefore, the optimal power supply control mode I for target load LOAD1 is invalid at this time, and power is temporarily not supplied to target load LOAD1.

[0102] Example 6

[0103] It should be noted that, since the target system may have self-resetting settings, this embodiment provides another specific implementation method for achieving reliable power supply from multiple power sources and multiple bus connections, based on the above embodiments.

[0104] Furthermore, after executing either the optimal power supply control mode I or the optimal power supply control mode II for each target load, the following is also executed:

[0105] Based on the self-reset setting information of the target system, a new optimal power supply control mode I or a new optimal power supply control mode II is generated for each target load; wherein, the self-reset setting information includes the specific states of a specific power supply switch and a specific bus tie switch when a certain power supply is normal.

[0106] Specifically, the specific state of a specific power supply switch refers to a power supply switch in either the optimal power supply control mode I or the optimal power supply control mode II being in a closed or open state; the specific state of a specific bus tie switch refers to a bus tie switch in either the optimal power supply control mode I or the optimal power supply control mode II being in a closed or open state.

[0107] Taking Figure 3(b) as an example, assuming that the target system is pre-configured to supply power to the three loads when all three power supplies are normal, then in the topology shown in Figure 3(b), when power supply S1, power supply S2 and power supply S3 are all in normal state, the specific states of specific power supply switches QS1, QS2 and QS3 are all closed, and the specific states of specific bus tie switches QTIE1 and QTIE2 are all open.

[0108] Assuming that target load LOAD1 has the highest load priority and target load LOAD3 has the lowest load priority, then:

[0109] The new optimal power supply control mode I corresponding to the target load LOAD1 refers to adjusting the specific power supply switch QS1 to the closed state and adjusting the specific bus tie switch QTIE1 to the open state;

[0110] The new optimal power supply control mode I corresponding to the target load LOAD2 refers to adjusting the specific power supply switch QS2 to the closed state and adjusting the specific bus tie switch QTIE2 to the open state;

[0111] The new optimal power supply control method I corresponding to the target load LOAD3 refers to adjusting the specific power supply switch QS3 to the closed state;

[0112] Based on the new optimal power supply control method I for target loads LOAD1, LOAD2, and LOAD3, and the load priority, the opening and closing sequence of the power supply switch and the opening and closing sequence of the bus tie switch are determined.

[0113] Taking Figure 4(b) as an example, assuming that the target system is pre-configured to have a normal power supply S1, and at least a normal power supply S2 or S3, the two loads can be supplied separately. In the topology shown in Figure 4(b), when both power supply S1 and power supply S3 are in normal state, the specific states of specific power supply switches QS1 and QS3 are both closed, the specific state of specific power supply switch QS2 is open, the specific state of specific bus tie switch QTIE1 is open, and the specific state of specific bus tie switch QTIE2 is closed.

[0114] Assuming that target load LOAD2 has the highest load priority, and the output power of power supply S1 is greater than or equal to the rated power of target load LOAD1, and the output power of power supply S3 is greater than or equal to the rated power of target load LOAD2, then:

[0115] The new optimal power supply control mode I corresponding to the target load LOAD2 refers to adjusting the specific power supply switch QS3 and the specific bus tie switch QTIE2 to the closed state, adjusting the specific power supply switch QS2 to the open state, and adjusting the specific bus tie switch QTIE1 to the open state.

[0116] The new optimal power supply control method I corresponding to the target load LOAD1 refers to adjusting the specific power supply switch QS1 to the closed state;

[0117] Based on the new optimal power supply control method I for target loads LOAD1 and LOAD2, and the load priority, the opening and closing sequence of the power supply switch and the opening and closing sequence of the bus tie switch are determined.

[0118] It should be noted that when determining the opening and closing sequence of the power supply switch and the bus tie switch, the default principle is to open first and then close, and close the nearest switch.

[0119] Example 7

[0120] This embodiment also provides a specific implementation of a readable storage medium storing instructions that, when executed by a processor, implement the steps of the method for implementing reliable power supply to multiple power sources and multiple bus connections as described in Embodiments 1 to 6.

[0121] In the topology diagram of the target system, the number of loads may be greater than 1. In this case, the pre-configured high load priority comes into play. The load with the highest load priority among multiple loads is given priority in power supply, while low priority loads are allowed to have their power supply not guaranteed under special circumstances. For example, a factory area involves the power supply needs of various loads such as production equipment, office equipment, lighting, and air conditioning units. Under normal circumstances, the power supply needs of these loads can be met. However, in special circumstances such as power supply failure, low priority loads such as air conditioning units may be temporarily allowed to have their power supply not guaranteed, so as to meet the power supply needs of high priority loads such as production equipment as much as possible.

[0122] In addition, for application scenarios such as factories or industrial enterprises during the construction phase, the pre-configured load priorities can be temporarily adjusted. For example, if the site includes construction equipment, ventilation equipment, and lighting equipment with priorities from high to low, when debugging the lighting equipment, if the power supply for temporary construction is insufficient, the power supply strategy can be temporarily changed to reduce the priority of the ventilation equipment and temporarily shut down the ventilation equipment.

[0123] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0124] Those skilled in the art will recognize that the modules and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0125] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0126] If the integrated modules described above are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the methods of the above embodiments can also be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of the various method embodiments described above. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms.

[0127] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of the present invention or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solutions of the present invention, and all such modifications and substitutions should be covered within the scope of the technical solutions claimed in the present invention.

Claims

1. A method for realizing reliable power supply of multi-power sources and multi-bus ties, characterized in that, Includes the following steps, During the initialization phase: the topology diagram of the target system is read, and the configuration parameters and system layout corresponding to the target system are determined; wherein, the configuration parameters corresponding to the target system include the number of power supplies n and power supply identifiers in the target system, as well as the pre-configured load capacity and power priority of each power supply, the number of loads w connected to the target system and the target load identifier, as well as the pre-configured load power parameters and load priority, and the number of bus tie switches m, the bus tie switch identifier and the power supply switch identifier; Based on the system layout corresponding to the target system, determine the location of the power supply, load, and bus tie switch in the target system, as well as the connection relationship between the power supply, load, and bus tie switch. In the target system, the number of power supplies is equal to the number of power switches. The i-th power switch is used to control whether the i-th power supply participates in the load power supply. The bus tie switch is set between the i-th power switch and the k-th power switch and is used to control whether the i-th power supply and the k-th power supply participate in the load power supply at the same time. During the power supply phase: Read the identifiers of each target load and the power supply status detection results. Based on the configuration parameters corresponding to the target system, the power supply layout location, load layout location and bus tie switch layout location in the target system, as well as the connection relationship between the power supply, load and bus tie switch, determine the optimal power supply control method for each target load in sequence. Determine if there is a conflict between the optimal power supply control methods for each target load. If a conflict exists, the optimal power supply control method for the target load with lower load priority is determined to be an invalid power supply control method. If there is no conflict, the optimal power supply control method for each target load is determined to be a valid power supply control method.

2. The method for realizing reliable power supply of multi-power sources and multi-bonding according to claim 1, characterized in that, When determining whether there are conflicts between the optimal power supply control methods for each target load, the following steps are performed: Read the bus tie switch identifier in the optimal power supply control method for each target load, and determine whether there is an identical bus tie switch identifier among two or more optimal power supply control methods for target loads. If there are identical bus tie switch identifiers, determine whether the signal transmission directions on the lines corresponding to the identical bus tie switch identifiers are opposite. If so, determine that there is a conflict between the optimal power supply control methods for these target loads. If there are no identical bus tie switch identifiers, or if the signal transmission directions on the lines corresponding to identical bus tie switch identifiers are the same, then it is determined that there is no conflict between the optimal power supply control methods for each target load.

3. The method for realizing reliable power supply of multi-power sources and multi-bonding according to claim 1, characterized in that, Based on the configuration parameters corresponding to the target system, the power supply location, load location, and bus tie switch location in the target system, as well as the connection relationship between the power supply, load, and bus tie switch, when determining the optimal power supply control method for each target load in sequence, the following steps are executed: Step 0: Select the load with the highest load priority as the first target load; Step 101: Determine the power supply requirements of the first target load; Step 102: Determine whether the load capacity of each power supply meets the power supply requirements of the first target load according to the power supply priority. If the Xth power supply meets the power supply requirements of the first target load and the Xth power supply is in normal condition, then the optimal power supply control mode I for the first target load is generated; when executing the optimal power supply control mode I, the Xth power supply switch is adjusted to the closed state, and the bus tie switch between the Xth power supply switch and the first target load is adjusted to the closed state. If the Xth power supply meets the power supply requirements of the first target load and the Xth power supply is in an abnormal state, or no power supply that meets the power supply requirements of the first target load is found, then proceed to step 103. Step 103: Randomly select R power supplies from the n power supplies to form a power supply combination, calculate the sum of the power of each power supply combination, and arrange the power supply combinations in ascending order to obtain the power supply combination U. R-1 U R-2 , ......, U R-((n(n-1)) / 2) And determine whether each power supply combination in turn meets the power supply requirements of the first target load; where R=2; Step 104, if the power supply combination U R-Y meets the power supply demand of the first target load and the power supply in the power supply combination U R-Y is in normal state, the optimal power supply control mode II of the first target load is generated. When the optimal power supply control mode II is executed, the power supply combination U R-Y The two power supply switches corresponding to the two power supply sources are adjusted to be closed, and the bus tie switch between the two power supply switches and the first target load is adjusted to be closed. Step 105: If no power supply combination that meets the power supply requirements of the first target load is found, or if power supply combination U... R-Y If an abnormal power source is found, R = R + 1 and continue executing steps 103 and 104 until the required power source combination is found or R is greater than the preset value (n(n-1)) / 2.

4. The method for realizing reliable power supply of multi-power sources and multi-bonding according to claim 3, characterized in that, After generating the optimal power supply control mode I or optimal power supply control mode II for each target load, it is also determined whether the corresponding power supply switch and bus tie switch in optimal power supply control mode I or optimal power supply control mode II are activated based on the current status of the power supply switch and bus tie switch. When determining whether the corresponding power supply switch and bus tie switch in the optimal power supply control mode I or optimal power supply control mode II for each target load are activated, execute: If the current state of the corresponding power supply switch in the optimal power supply control mode I or optimal power supply control mode II for each target load is inconsistent with the target state, a closing command is generated to control the corresponding power supply switch to operate; otherwise, the corresponding power supply switch does not operate. The target state of the power supply switch is the closed state. If the current state of the corresponding bus tie switch in optimal power supply control mode I or optimal power supply control mode II is inconsistent with the target state, a closing command is generated to control the corresponding bus tie switch to operate; otherwise, the bus tie switch should not operate. The target state of the bus tie switch is the closed state.

5. The method for achieving reliable power supply from multiple power sources and multiple bus connections according to claim 4, characterized in that: During the execution of the optimal power supply control mode I or optimal power supply control mode II for each target load, it is also determined whether the power supply corresponding to the optimal power supply control mode I or optimal power supply control mode II is abnormal. If so, the current action is stopped, the target system is restored to its initial state, and the optimal power supply control mode I or optimal power supply control mode II for the corresponding target load is re-determined.

6. The method for realizing reliable power supply of multi-power sources and multi-bonding according to claim 4, characterized in that, During the execution of the optimal power supply control mode I or optimal power supply control mode II for each target load, it is also determined whether there is a closing / opening fault in the power supply switch or bus tie switch corresponding to the optimal power supply control mode I or optimal power supply control mode II. If so, the current action is stopped, the target system is restored to its initial state, and the optimal power supply control mode I or optimal power supply control mode II for the corresponding target load is re-determined.

7. The method for realizing reliable power supply of multi-power sources and multi-bonding according to claim 4, characterized in that: After generating the optimal power supply control mode I or optimal power supply control mode II for each target load, it is further determined whether the optimal power supply control mode I or optimal power supply control mode II is effective based on the bus tie power supply setting information of the target system; wherein, the bus tie power supply setting information includes the specific state of each bus tie switch; Based on the bus power supply settings of the target system, if it is determined whether the optimal power supply control mode I or the optimal power supply control mode II is effective, then execute: Read the target state of the bus tie switch in the optimal power supply control mode I or the optimal power supply control mode II, and determine whether there is a conflict between the target state of the bus tie switch and the specific state of each bus tie switch; If a conflict exists, the optimal power supply control method I or optimal power supply control method II for the target load is deemed invalid. 8.The method for realizing reliable power supply of multi-power sources and multi-bonding according to claim 4, wherein, After executing either the optimal power supply control method I or the optimal power supply control method II for each target load, the following is also executed: Based on the self-reset setting information of the target system, a new optimal power supply control mode I or a new optimal power supply control mode II is generated for each target load; wherein, the self-reset setting information includes a specific power supply switch and a specific bus tie switch being in a specific state when a certain power supply is normal. 9.The method for realizing reliable power supply of multi-power sources and multi-bonding according to claim 4, wherein, After executing either the optimal power supply control method I or the optimal power supply control method II for each target load, the following is also executed: Determine whether the current state of the corresponding power supply switch and bus tie switch is consistent with the target state in either the optimal power supply control mode I or the optimal power supply control mode II. If there is a discrepancy, the entire operation process is unlocked, allowing the corresponding power supply switch and bus tie switch to operate again. After the operation is completed, the lock is engaged and no further operation is allowed. If they match, the circuit breaker will be locked after the operation is completed, and the corresponding power supply switch and bus tie switch will not be allowed to operate again.

10. A readable storage medium, having stored thereon instructions, characterized in that: When executed by the processor, this instruction implements the steps of the method for implementing reliable power supply from multiple power sources and multiple bus connections as described in any one of claims 1-9.

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