Intelligent stand-by power supply automatic switching device suitable for multiple incoming lines of distribution network and control method of intelligent stand-by power supply automatic switching device

Abstract

The invention relates to the technical field of standby power supply automatic switching, and provides an intelligent standby power supply automatic switching device suitable for multiple incoming lines of a distribution network and a control method thereof.The intelligent standby power supply automatic switching device comprises a digital processing module, an optical communication interface, a multi-incoming-line adaptive logic module, an intelligent standby power supply switching function module and a constant value and wave recording module; the optical communication interface transmits acquired switch position signals and maintenance pressing plate state signals to the digital processing module through optical fibers. The digital processing module adopts a multi-core CPU + FPGA architecture and is integrated with a time-frequency synchronization module, automatically generates spare power switching logic and transmits the spare power switching logic to the intelligent spare power switching function module; the intelligent spare power switching function module comprises a plurality of spare power switching modes. The method has the advantages that multiple incoming lines and complex topology are supported, N supply-N standby and other scenes of the distribution network are met, each power supply can be set on different buses according to a fixed value and can be set as an incoming line or outgoing line attribute, expansibility is high, and different requirements of current and long-term power supply attributes are met.

Description

Technical Field

[0001] This invention relates to the field of automatic backup power transfer technology, specifically to an intelligent automatic backup power transfer device and its control method suitable for multiple incoming lines in distribution networks. Background Technology

[0002] As the final link in the power system supplying electricity to users, the reliability of the power distribution network directly affects users' electricity experience and power quality. Automatic transfer switch (ATS) devices are key automation equipment for improving the reliability of the distribution network, capable of quickly switching loads to backup power sources after the main power supply fails, minimizing power outage time for users. However, traditional ATS devices have significant limitations in technical design and application, making it difficult to adapt to the intelligent and flexible development needs of modern distribution networks.

[0003] Regarding topology adaptability, existing automatic transfer switch (ATS) devices are typically designed based on a fixed two-input line pattern, which cannot adapt to complex distribution network structures with multiple power sources. Related patented technologies attempt to address this issue. For example, patent application number CN202220275407.5, "An Asynchronous Power Supply ATS System," proposes controlling multiple sets of capacitors and circuit breakers in parallel via a program module to achieve multi-power supply and multi-line control. However, it primarily targets industrial power consumption scenarios such as chemical plants, and its adaptability in general distribution network environments is limited. Another patent application number, CN202110038609.8, "An ATS Device and Method for Substations with Internal Bridge Connections," classifies the automatic transfer method into four types and introduces precise interlocking logic between the main transformer protection action and the ATS mode. While this improves the adaptability of the bridge connection to some extent, it still lacks effective solutions for scenarios such as changes in current / future line attributes and priority selection of multiple backup power sources.

[0004] Regarding the level of intelligence, existing devices suffer from fixed logic, making dynamic adjustments impossible based on specific on-site conditions. While the aforementioned patented technologies achieve a certain degree of intelligent control through specific program modules and interlocking logic, the backup switching strategy remains relatively fixed. This prevents users from flexibly configuring and modifying charging and discharging conditions and operational logic online according to actual operational needs, making it difficult to adapt to the changing power flow direction of new distribution networks after the integration of distributed power sources. In terms of communication methods, traditional devices rely on hard-wired cables to collect analog and digital signals, resulting in complex wiring, high costs, and susceptibility to interference. Existing patented technologies fail to effectively address this limitation, lacking digital solutions based on modern communication technologies and unable to support efficient data interaction and information sharing between backup automatic transfer devices and distribution network automation systems. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this paper aims to solve the problems of limited topological adaptability, insufficient intelligence, and weak system integration in existing backup automatic transfer technology. This invention provides an intelligent backup power automatic transfer device suitable for multi-incoming lines in distribution networks, including a digital processing module, an optical communication interface, a multi-incoming line adaptive logic module, an intelligent backup power transfer function module, and a setting and waveform recording module; The optical communication interface transmits the collected switch position signal and maintenance pressure plate status signal to the digital processing module through an optical fiber connection to a merging unit or a smart terminal device. The digital processing module adopts a multi-core CPU+FPGA architecture and integrates a time-frequency synchronization module. After the FPGA module parses the signal information, it transmits the analog and digital information to the CPU module. The CPU module performs charging, discharging, and action logic judgments of the backup automatic transfer logic based on the analog and digital information and transmits the instructions to the multi-input adaptive logic module. The multi-input adaptive logic module configures multiple input lines by setting a fixed value, automatically generates backup power logic, and transmits it to the intelligent backup power function module. The intelligent backup power supply module includes multiple backup power supply modes, adapting to scenarios such as parallel operation of multiple incoming lines in the distribution network, separate operation of busbars, and busbar undervoltage section backup power supply.

[0006] As a preferred embodiment, the time-frequency synchronization module adopts IEEE1588PTP, and the message time synchronization accuracy of the GOOSE / SV protocol processing module is ≤1ms.

[0007] As a preferred embodiment, the optical communication module is configured with 8 or more gigabit optical Ethernet ports and supports expansion optical port cards.

[0008] As a preferred option, it also includes a human-computer interaction module, which integrates a touch LCD screen and a maintenance network port, supporting local and remote configuration of settings and status viewing.

[0009] As a preferred embodiment, the communication protocol of the self-transfer device includes an SV protocol processing module and a GOOSE protocol processing module; The SV protocol processing module parses the multi-input current, segmented current, and bus voltage from the merging unit; The GOOSE protocol processing module subscribes to the position signals of the incoming line switch and the sectionalizing switch, as well as the status of the maintenance pressure plate, and issues automatic transfer trip commands, automatic transfer closing commands, and alarm signals. It also supports network storm suppression and message retransmission mechanisms.

[0010] As a preferred option, it also includes a status diagnosis and self-healing module: real-time monitoring of the SV protocol processing module, GOOSE protocol processing module, voltage transformer and current transformer open circuit and switch position abnormalities, and automatically blocking the fault logic and switching to the redundant path after detecting the abnormality.

[0011] A control method for using the above-mentioned intelligent backup power automatic transfer device suitable for multi-incoming lines in distribution networks is also provided, comprising the following steps: The S1.SV protocol processing module receives SV messages sent by the merging unit and parses analog quantities such as multi-input current and bus voltage; the GOOSE protocol processing module subscribes to GOOSE messages to obtain switch position signals and pressure plate status signals, and issues control commands to the intelligent execution unit. S2. If the judgment conditions are met, such as busbar undervoltage, no current from working power supply and voltage from standby power supply, a GOOSE trip command is issued after a delay. After the working power supply trips and no current is detected, the standby power supply is closed according to priority. S3. If the busbar does not regain voltage after closing the switch, try closing the next priority power supply or sectionalizing switch, and repeat until the busbar voltage is restored. If the busbar is overloaded after successful closing, the overload reduction function will be activated.

[0012] As a preferred option, if the conditions are met—the busbar is energized, the working power supply is on, and there is no blocking signal—then the backup power supply is charged.

[0013] As a preferred option, the fault waveform records generated from the start-up of the automatic transfer switch to the end of the operation are recorded to form a reviewable report.

[0014] The beneficial effects of this invention are as follows: 1. Flexible adaptation of multiple incoming lines: This invention supports multiple incoming lines and complex topologies, meeting the needs of distribution network scenarios such as "N supply - N backup". Each power source can be set on different buses according to the set value and can be set as an incoming or outgoing line. It has strong scalability and meets the different requirements of power source attributes in the current and long term. 2. Intelligence and Reliability: GOOSE / SV replaces cables. GOOSE / SV supports point-to-point or network data acquisition, reducing distribution network terminal wiring by more than 60%, lowering construction and maintenance costs, and improving anti-interference capabilities. The dual-network configuration of GOOSE can improve the reliability of power supply to the distribution network. The charging and discharging logic and action logic of each backup automatic transfer mode can be set independently, improving the intelligence level of the device. Detailed Implementation

[0015] To illustrate the features of the present invention, the present invention will be further described below with reference to embodiments.

[0016] Example 1: This embodiment provides an intelligent backup power automatic transfer device suitable for multi-incoming lines in distribution networks, including a digital processing module, an optical communication interface, a multi-incoming-line adaptive logic module, an intelligent backup power transfer function module, and a setting and waveform recording module; The optical communication interface transmits the collected switch position signals and maintenance pressure plate status signals to the digital processing module through the optical fiber connection and merging unit; the optical communication interface is configured with 8 gigabit optical Ethernet ports and supports expansion optical port cards.

[0017] The digital processing module adopts a multi-core CPU+FPGA architecture and integrates a time-frequency synchronization module. The time-frequency synchronization module adopts IEEE1588PTP, and the message time synchronization accuracy of the GOOSE / SV protocol processing module is ≤1ms. After parsing the signal information, the FPGA module transmits the analog and digital signals to the CPU module. The CPU module performs charging, discharging, and operation logic judgments based on the analog and digital signals and transmits the instructions to the multi-input adaptive logic module. The communication protocol includes an SV protocol processing module and a GOOSE protocol processing module. The SV protocol processing module parses the multi-input current (IL1~ILn), segment current (Ia / Ib / Ic), and bus voltage (Ua1 / Ub1 / Uc1, Ua2 / Ub2 / Uc2) from the merging unit. The GOOSE protocol processing module subscribes to the position signals (tripped / closed) of the incoming line switch and segment switch, as well as the status of the maintenance pressure plate, and issues automatic transfer trip commands, automatic transfer closing commands, and alarm signals (16 sets of GOOSE trip outputs + 1 set of automatic transfer operation signals), and supports network storm suppression and message retransmission mechanisms.

[0018] The multi-incoming-line adaptive logic module configures multiple incoming lines through setting a fixed value, automatically generates backup power supply logic, and transmits it to the intelligent backup power supply function module. Specifically, this embodiment supports flexible configuration of 8 incoming lines. By setting a fixed value, the incoming line operating bus includes backup power supplies of bus I and bus II with priority levels 0 to 8, and automatically generates backup power supply logic. The intelligent backup deployment module includes multiple backup deployment methods: 1. Parallel operation of multiple incoming lines with automatic transfer switch: suitable for busbar parallel operation and multiple incoming line redundancy scenarios; 2. Automatic transfer switch for bus I in separate operation: Applicable to scenarios where sectionalizing switches are disconnected and multiple incoming lines are connected to bus I; 3. Automatic transfer switch for secondary bus II: Applicable to scenarios where sectionalizing switches are disconnected and secondary bus II has multiple incoming lines; 4. Automatic transfer switch for sectionalizing the busbar undervoltage: Applicable to scenarios where the sectionalizing switch is disconnected and the busbar undervoltage has priority to close the sectionalizing switch. 5. Automatic transfer switch for sectionalizing the busbar under voltage loss: Applicable to scenarios where the sectionalizing switch is open and the busbar under voltage loss prioritizes closing the sectionalizing switch; This embodiment also includes a human-computer interaction module, which integrates a touch LCD screen and a maintenance network port, supporting local and remote configuration of settings and viewing of status.

[0019] In addition, it includes a status diagnosis and self-healing module: real-time monitoring of the SV protocol processing module, GOOSE protocol processing module, voltage transformer and current transformer open circuit and switch position abnormalities, and automatically blocking the fault logic and switching to the redundant path after detecting the abnormality.

[0020] Example 2: This embodiment provides a control method using the above-described intelligent backup power automatic transfer device suitable for multi-incoming lines in distribution networks, including the following steps: The S1.SV protocol processing module receives SV messages sent by the merging unit and parses analog quantities such as multi-input current and bus voltage, including the following analog quantities: (1) Status of the power supply interval The status of power supply X is divided into: power supply X operating on bus I, power supply X on standby on bus I, power supply X operating on bus II, power supply X on standby on bus II, and power supply X under maintenance. It is important to emphasize that the status of power supply X refers to the status used in the automatic transfer switch logic, not the status of power supply X itself. When the interval is an outgoing line, it can be configured to the maintenance status.

[0021] Power supply X operates on bus I: Power supply X interval should simultaneously meet the following conditions, in an AND relationship: ① Both the soft pressure plate and the hard pressure plate for power supply X maintenance are in the out position; ② Power supply X interval operates on bus I (power supply X operating bus number is set to 1); ③ Set “Power Supply X Power Supply Group and Backup Priority” to a non-zero value; ④ The “Power X Jump” input signal status is 0, or there is current in Power X.

[0022] Power supply X is on standby in main line I: Power supply X interval should simultaneously meet the following conditions, in an AND relationship: ① Both the soft pressure plate and the hard pressure plate for power supply X maintenance are in the out position; ② Power supply X interval operates on bus I (power supply X operating bus number is set to 1); ③ Set “Power Supply X Power Supply Group and Backup Priority” to a non-zero value; ④ The “Power X Jump” input signal is in state 1 and there is no current in Power X.

[0023] Power supply X operates in bus II: Power supply X interval should simultaneously meet the following conditions, in an AND relationship: ① Both the soft pressure plate and the hard pressure plate for power supply X maintenance are in the out position; ② Power supply X interval operates on bus II (power supply X operating bus number is set to 2); ③ Set “Power Supply X Power Supply Group and Backup Priority” to a non-zero value; ④ The “Power X Jump” input signal status is 0, or there is current in Power X.

[0024] Power supply X is on standby in bus II: Power supply X interval should simultaneously meet the following conditions, in an AND relationship: ① Both the soft pressure plate and the hard pressure plate for power supply X maintenance are in the out position; ② Power supply X interval operates on bus II (power supply X operating bus number is set to 2); ③ Set “Power Supply X Power Supply Group and Backup Priority” to a non-zero value; ④ The “Power X Jump” input signal is in state 1 and there is no current in Power X.

[0025] Power supply X maintenance: Power supply X does not participate in the automatic transfer switch logic and does not perform tripping or closing control. One of the following conditions must be met, using an "OR" relationship: ① Power supply X maintenance soft pressure plate is put into operation; ② Power supply X maintenance hard plate is put into operation; ③ Set “Power Supply X Power Supply Group and Backup Priority” to 0; ④ Set “Power Supply X Operating Bus Number” to 0.

[0026] (2) The state of segmented intervals The status of a sectional circuit breaker is divided into sectional operation, sectional standby, and sectional maintenance. It is important to emphasize that the status of the sectional circuit breaker refers to the status used in the automatic transfer switch logic, not the status of the component itself.

[0027] Segmented work: The segmentation interval should simultaneously meet the following conditions, with an "AND" relationship: ① Both the soft and hard pressure plates for the section are in the out state; ② Set the “No sectional circuit breaker” control word to 0; ③ The “segmented jump” input signal status is 0, or there is current in the segment.

[0028] Segmented Backup: The segmentation interval should simultaneously meet the following conditions, in an AND relationship: ① Both the soft and hard pressure plates for the section are in the out state; ② Set the “No sectional circuit breaker” control word to 0; ③ The “segmented jump” input signal status is 1 and there is no current in the segment.

[0029] Sectional maintenance: Sectional maintenance does not participate in the automatic transfer switch logic judgment and does not perform tripping or closing control. One of the following conditions must be met, using an "OR" relationship: ① The “No-section circuit breaker” control word is set to 1; ② The soft pressure plate is put into operation for segmented maintenance; ③ The hard pressure plate is put into operation for segmented maintenance; The GOOSE protocol processing module subscribes to GOOSE messages to obtain switch position signals and pressure plate status signals, and issues control commands to the intelligent execution unit. S2. If the judgment conditions are met—busbar undervoltage, no current from the working power supply, and voltage from the standby power supply—a GOOSE trip command is issued after a delay. After the working power supply trips and no current is detected, the standby power supply is closed according to priority. In this embodiment, the five specific automatic transfer switching methods all include the following logical conditions, and each logical condition of each method can be edited independently: ① Charging logic conditions: Charging logic AND condition 1, Charging logic OR condition 1, Charging logic OR condition 2, Charging logic OR condition 3; ② Discharge logic conditions: discharge logic OR condition 1, discharge logic OR condition 2, discharge logic AND condition 1; ③ Action logic condition: Action logic AND condition 1, Action logic OR condition 1.

[0030] Each of the above logical conditions generates a WORD value, and each sub-condition occupies one bit. The meaning of the data contained in each logical condition is explained below: Charging logic conditions (1) Charging logic and condition 1: This condition is satisfied only if every bit satisfies this logic. (2) Charging logic OR condition 1: This condition is satisfied if any bit satisfies this logic. (3) Charging logic OR condition 2: This condition is satisfied if any bit satisfies this logic. (4) Charging logic OR condition 3: This condition is satisfied if any bit satisfies this logic. Discharge logic conditions (1) Discharge logic OR condition 1: This condition is satisfied if any bit satisfies this logic. (2) Discharge logic OR condition 2: This condition is satisfied if any bit satisfies this logic. (3) Discharge logic AND condition 1: This condition is satisfied by every bit. Action logic conditions (1) Action logic and condition 1: This condition is satisfied only if every bit satisfies this logic. (2) Action logic OR condition 1: This condition is satisfied if any bit of this logic is satisfied. Based on the above conditions, select the backup self-connection method, including: (1) Parallel operation incoming line automatic transfer mode The default charging conditions are as follows (the following conditions can be modified according to the site conditions): Charging logic and conditions 1:3; Charging logic or condition 1: 65535; Charging logic OR condition 2: 65535; Charging logic OR condition 3:1; (The above parameters are obtained by converting the binary numbers generated in the table above into decimal parameters, and the same applies below.) The following conditions are fixed and cannot be edited: ① The automatic transfer switch function soft switch, the parallel operation incoming line automatic transfer switch mode control word, and the parallel operation incoming line automatic transfer switch mode soft switch are all in operation; ② No interlocking backup automatic transfer signal; After all the above conditions are met for 15 seconds, the automatic charging will be completed.

[0031] The default discharge conditions are as follows (the following conditions can be modified according to the site conditions): Discharge logic OR condition 1: 865; Discharge logic OR condition 2: 511; Discharge logic AND condition 1:4; The following conditions are fixed and cannot be edited: ① Any of the following can be deactivated: automatic transfer switch function control plate, parallel operation incoming line automatic transfer switch mode control word, or parallel operation incoming line automatic transfer switch mode soft control plate; ② There is a lockout automatic transfer signal (lockout signal or analog quantity abnormal lockout or inconsistent with Goose maintenance). ③ The preparation throw failed; ④ Any busbar maintenance pressure plate (hard or soft) is engaged; Once any of the above conditions are met, the backup power supply will be automatically activated.

[0032] Default parameters for action logic conditions (the following condition parameters can be modified according to the actual situation): Action Logic and Conditions 1:53 Action logic or condition 1: 65535 After the device completes charging in this mode, Bus I and Bus II are de-energized, all working power supplies X have no current, and any standby power supply X has voltage. After the "standby trip delay" is triggered, all working power supplies X and the combined disconnection outlets of Bus I and Bus II are tripped. After confirming that all working power supplies X meet the tripping requirements and have no current, the "standby automatic transfer closing delay" is triggered, and the standby power supply with higher priority and voltage is closed first (if no standby power supply exists, the standby transfer operation ends). ① If, after closing the circuit, both lines of Bus I and Bus II are energized, the standby operation ends. ② If, after closing, the conditions of either line of Bus I and either line of Bus II being energized are not met, and a backup power supply with low priority and energized exists (if no backup power supply exists, the backup transfer operation ends), then the backup power supply is tripped. After confirming that the backup power supply is tripped and has no current, the backup power supply with low priority and energized exists is closed again after the "backup automatic transfer closing delay".

[0033] (2) Separate operation of the I motherboard with automatic switching The default charging conditions are as follows (the following conditions can be modified according to the site conditions): Charging logic and conditions 1:1; Charging logic OR condition 1: 255; Charging logic OR condition 2: 255; Charging logic OR condition 3:6; The following conditions are fixed and cannot be edited: ① The automatic transfer switch function soft pressure plate, the automatic transfer switch control word of the split-running I bus, and the automatic transfer switch soft pressure plate of the split-running I bus are all in operation; ② No interlocking backup automatic transfer signal; After all the above conditions are met for 15 seconds, the automatic charging will be completed.

[0034] The default discharge conditions are as follows (the following conditions can be modified according to the site conditions): Discharge logic OR condition 1: 135; Discharge logic OR condition 2: 255; Discharge logic AND condition 1:1; The following conditions are fixed and cannot be edited: ① Any of the following can be deactivated: automatic transfer switch, split-line operation I bus incoming line control word, or split-line operation I bus incoming line soft switch; ② There is a lockout automatic transfer signal (lockout signal or analog quantity abnormal lockout or inconsistent with Goose maintenance). ③ The preparation throw failed; ④ Put in the maintenance pressure plate (hard or soft pressure plate) of the main bus; Once any of the above conditions are met, the backup power supply will be automatically activated.

[0035] Default parameters for action logic conditions (the following condition parameters can be modified according to the actual situation): Action Logic and Condition 1:17 Action logic or condition 1: 255 After the device completes charging in this mode, Bus I is de-energized, all working power supplies X on Bus I are without current, and any standby power supply X on Bus I is energized. After the "standby trip delay" trips all working power supplies X on Bus I and the Bus I connection disconnection outlet, and confirms that all working power supplies X on Bus I meet the trip position and are without current, the "standby automatic transfer closing delay" closes the standby power supply with current on Bus I (if it does not exist, the standby transfer operation ends). ① If, after closing the circuit breaker, either line of Bus I is energized, the standby operation ends. ② If the condition that either line of Bus I is energized is not met after closing the circuit, the backup power supply will be tripped again if the maintenance pressure plate (hard pressure plate and soft pressure plate) of Bus II is not engaged, the section is on standby, and Bus II is energized for 15 seconds (if this condition is not met, the backup power supply operation ends). After confirming that the backup power supply is tripped and there is no current, the section will be closed again after the "backup automatic transfer closing delay".

[0036] (3) Automatic switching of the standby train II in separate operation The default charging conditions are as follows (the following conditions can be modified according to the site conditions): Charging logic and conditions 1:2; Charging logic or condition 1: 65280; Charging logic or condition 2: 65280; Charging logic OR condition 3:6; The following conditions are fixed and cannot be edited: ① The automatic transfer switch function soft pressure plate, the automatic transfer switch control word of the split-run II bus, and the automatic transfer switch soft pressure plate of the split-run II bus are all in operation; ② No interlocking backup automatic transfer signal; After all the above conditions are met for 15 seconds, the automatic charging will be completed.

[0037] The default discharge conditions are as follows (the following conditions can be modified according to the site conditions): Discharge logic OR condition 1: 153; Discharge logic OR condition 2: 255; Discharge logic AND condition 1:2; The following conditions are fixed and cannot be edited: ① Any of the following can be deactivated: automatic transfer switch, split-running II bus incoming line control word, or split-running II bus incoming line soft switch; ② There is a lockout automatic transfer signal (lockout signal or analog quantity abnormal lockout or inconsistent with Goose maintenance). ③ The preparation throw failed; ④ Put in the maintenance pressure plate (hard or soft pressure plate) of the II busbar; Once any of the above conditions are met, the backup power supply will be automatically activated.

[0038] Default parameters for action logic conditions (the following condition parameters can be modified according to the actual situation): Action Logic and Conditions 1:36 Action logic or condition 1: 65280 After the device completes charging in this mode, Bus II is de-energized, all working power supplies X of Bus II are without current, and any standby power supply X of Bus II is energized. After the "standby trip delay" trips all working power supplies X of Bus II and the Bus II connection disconnection outlet, and confirms that all working power supplies X of Bus II meet the trip position and are without current, the "standby automatic transfer closing delay" closes the standby power supply with current on Bus II (if it does not exist, the standby transfer operation ends). ①If the backup operation ends when either line of Bus II is powered after the circuit is closed; ② If the condition that either line of Bus II is not energized after closing is met, the backup power supply will be tripped again if the maintenance pressure plate (hard pressure plate and soft pressure plate) of Bus I is not engaged and the section is on standby and Bus I is energized for 15 seconds (if this condition is not met, the backup power supply operation will end). After confirming that the backup power supply is tripped and there is no current, the section will be closed again after the "backup automatic transfer closing delay".

[0039] (4) I. Automatic switching of the main pressure loss section The default charging conditions are as follows (the following conditions can be modified according to the site conditions): Charging logic and conditions 1:3; Charging logic OR condition 1: 255; Charging logic OR condition 2: 255; Charging logic OR condition 3:2; The following conditions are fixed and cannot be edited: ① The automatic switching function soft pressure plate, the automatic switching control word for the I bus under pressure section, and the automatic switching soft pressure plate for the I bus under pressure section are all activated; ② No interlocking backup automatic transfer signal; After all the above conditions are met for 15 seconds, the automatic charging will be completed.

[0040] The default discharge conditions are as follows (the following conditions can be modified according to the site conditions): Discharge logic OR condition 1: 1697; Discharge logic OR condition 2: 255; Discharge logic AND condition 1:24; The following conditions are fixed and cannot be edited: ① Any of the following can be deactivated: automatic transfer switch soft pressure plate, automatic transfer switch control word for the I bus under pressure section, or automatic transfer switch soft pressure plate for the I bus under pressure section. ② There is a lockout automatic transfer signal (lockout signal or analog quantity abnormal lockout or inconsistent with Goose maintenance). ③ Failed preparation throw ④ Any busbar maintenance pressure plate (hard or soft) is put into operation. Once any of the above conditions are met, the backup power supply will be automatically activated.

[0041] Default parameters for action logic conditions (the following condition parameters can be modified according to the actual situation): Action Logic and Condition 1:25 Action logic or condition 1: 0 After the device completes charging in this manner, if the conditions are met that Bus I is de-energized and all working power supplies X of Bus I are without current, and any line of Bus II is energized, and if the standby automatic transfer switch of Bus I is not activated, all incoming power supplies of Bus I and the joint disconnection outlet of Bus I will be tripped after the "standby trip delay". After confirming that all incoming power supplies of Bus I meet the trip position and have no current, the sections will be closed after the "standby automatic transfer closing delay".

[0042] (5) Automatic switching of the II main line under pressure loss section The default charging conditions are as follows (the following conditions can be modified according to the site conditions): Charging logic and conditions 1:3; Charging logic OR condition 1: 255; Charging logic OR condition 2: 255; Charging logic OR condition 3:2; The following conditions are fixed and cannot be edited: ① The automatic switching function soft pressure plate, the automatic switching control word for the II bus under pressure section, and the automatic switching soft pressure plate for the II bus under pressure section are all activated; ② No interlocking backup automatic transfer signal; After all the above conditions are met for 15 seconds, the automatic charging will be completed.

[0043] The default discharge conditions are as follows (the following conditions can be modified according to the site conditions): Discharge logic OR condition 1: 1697; Discharge logic OR condition 2: 255; Discharge logic AND condition 1:24; The following conditions are fixed and cannot be edited: ① Any of the following can be deactivated: automatic transfer switch pressure plate, automatic transfer switch control word for the II bus under pressure section, or automatic transfer switch soft pressure plate for the II bus under pressure section; ② There is a lockout automatic transfer signal (lockout signal or analog quantity abnormal lockout or inconsistent with Goose maintenance). ③ The preparation throw failed; ④ Any busbar maintenance pressure plate (hard or soft) is engaged; Once any of the above conditions are met, the backup power supply will be automatically activated.

[0044] Default parameters for action logic conditions (the following condition parameters can be modified according to the actual situation): Action Logic and Condition 1:22 Action logic or condition 1: 0 After the device completes charging in this manner, if the conditions of no voltage on Bus II and no current in all working power supplies X on Bus II, and voltage on any line of Bus I are met, and if the standby automatic transfer switch of Bus II is not activated, all incoming power supplies of Bus II and the joint disconnection outlet of Bus II will be tripped after the "standby trip delay". After confirming that all incoming power supplies of Bus II meet the tripping position and have no current, the sections will be closed after the "standby automatic transfer closing delay".

[0045] S3. If the busbar does not regain voltage after closing the switch, try closing the next priority power supply or sectionalizing switch, and repeat until the busbar voltage is restored. If the busbar is overloaded after successful closing, the overload reduction function will be activated: the overload reduction function will be activated 600 seconds after the associated automatic transfer switch action.

[0046] In addition, this embodiment can record fault waveforms generated from the start of automatic switching to the end of the operation, forming a reviewable report.

[0047] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. The present invention has been described in detail with reference to preferred embodiments. Those skilled in the art should understand that any changes, modifications, additions, or substitutions made by those skilled in the art within the scope of the present invention do not depart from the spirit of the present invention and should also fall within the protection scope of the claims of the present invention. Other related technical structures not disclosed in detail in the present invention are existing technologies in the field.

Claims

1. An intelligent backup power automatic transfer device suitable for multi-incoming-line distribution networks, characterized in that, It includes a digital processing module, an optical communication interface, a multi-line adaptive logic module, an intelligent backup power supply function module, and a setting and waveform recording module; The optical communication interface transmits the collected switch position signal and maintenance pressure plate status signal to the digital processing module through an optical fiber connection to a merging unit or a smart terminal device. The digital processing module adopts a multi-core CPU+FPGA architecture and integrates a time-frequency synchronization module. After the FPGA module parses the signal information, it transmits the analog and digital information to the CPU module. The CPU module performs charging, discharging, and action logic judgments of the backup automatic transfer logic based on the analog and digital information and transmits the instructions to the multi-input adaptive logic module. The multi-input adaptive logic module configures multiple input lines by setting a fixed value, automatically generates backup power logic, and transmits it to the intelligent backup power function module. The intelligent backup power supply module includes multiple backup power supply modes, adapting to scenarios such as parallel operation of multiple incoming lines in the distribution network, separate operation of busbars, and busbar undervoltage section backup power supply.

2. The intelligent backup power automatic transfer device for multi-incoming power distribution networks according to claim 1, characterized in that, The time-frequency synchronization module adopts IEEE1588PTP, and the message time synchronization accuracy of the GOOSE / SV protocol processing module is ≤1ms.

3. The intelligent backup power automatic transfer device for multi-incoming power distribution networks according to claim 2, characterized in that, The optical communication interface is configured with 8 or more gigabit optical Ethernet ports and supports expansion optical port cards.

4. The intelligent backup power automatic transfer device for multi-incoming power distribution networks according to claim 1, characterized in that, It also includes a human-computer interaction module, which integrates a touch LCD screen and a maintenance network port, supporting local and remote configuration of settings and status viewing.

5. The intelligent backup power automatic transfer device for multi-incoming power distribution networks according to claim 1, characterized in that, The communication protocol of the self-operated device includes an SV protocol processing module and a GOOSE protocol processing module; The SV protocol processing module parses the multi-input current, segmented current, and bus voltage from the merging unit; The GOOSE protocol processing module subscribes to the position signals of the incoming line switch and the sectionalizing switch, as well as the status of the maintenance pressure plate, and issues automatic transfer trip commands, automatic transfer closing commands, and alarm signals. It also supports network storm suppression and message retransmission mechanisms.

6. The intelligent backup power automatic transfer device for multi-incoming power distribution networks according to claim 1, characterized in that, It also includes a status diagnosis and self-healing module: real-time monitoring of the SV protocol processing module, GOOSE protocol processing module, voltage transformer and current transformer open circuit and switch position abnormalities, and automatically blocking the fault logic and switching to the redundant path after detecting the abnormality.

7. A control method for an intelligent backup power supply automatic transfer device suitable for multi-incoming lines in a distribution network, as described in any one of claims 1 to 6, characterized in that, Includes the following steps: The S1.SV protocol processing module receives SV messages sent by the merging unit and parses analog quantities such as multi-input current and bus voltage; the GOOSE protocol processing module subscribes to GOOSE messages to obtain switch position signals and pressure plate status signals, and issues control commands to the intelligent execution unit. S2. If the judgment conditions are met, such as busbar undervoltage, no current from working power supply and voltage from standby power supply, a GOOSE trip command is issued after a delay. After the working power supply trips and no current is detected, the standby power supply is closed according to priority. S3. If the busbar does not regain voltage after closing the switch, try closing the next priority power supply or sectionalizing switch, and repeat until the busbar voltage is restored. If the busbar is overloaded after successful closing, the overload reduction function will be activated.

8. The control method according to claim 7, characterized in that, If the conditions are met—busbar is energized, working power supply is on, and there is no blocking signal—then the backup power supply will be charged.

9. The control method according to claim 7, characterized in that, Record the fault waveforms generated from the start of the automatic transfer switch to the end of its operation, and generate a reviewable report.

Images