Method, system and storage medium for multi-source coordinated switching and interlocking control based on ems

Abstract

The application provides an EMS-based multi-source cooperative switching and interlocking control method and system and a storage medium. First, the power grid state is monitored in real time. If the power grid is abnormal, the STS is used to realize fast switching operation. Then, photovoltaic power supply is preferentially started. When the photovoltaic power supply is unavailable, the DZZB-A module is used to detect the phase difference in real time, the rotating speed is dynamically adjusted based on the phase difference to meet the dynamic grid connection control of the oil engine (diesel generator), and the impact-free grid connection is realized. Finally, based on the power supply power and the load power, the PCS charging and discharging mode is intelligently switched, and the stability of the power supply system is improved. At the same time, through the dual-path auxiliary power redundancy mechanism, the STS cabinet working power supply is ensured, and the control circuit power loss blind area is eliminated. In addition, through the safety interlocking logic, the automatic disconnection of the power grid and the oil engine is realized, the short circuit problem caused by the parallel connection of the power supply is prevented, and the reliability of the power supply system is improved.

Description

Technical Field

[0001] This invention relates to the field of static switchgear, and more specifically, to a multi-source coordinated switching and interlocking control method, system, and storage medium based on EMS. Background Technology

[0002] Energy Management Systems (EMS) are primarily used for real-time monitoring, optimized scheduling, and safety assurance of power systems. Static Switchgear (STS) cabinets are mainly used to achieve rapid switching between two independent power sources, providing power supply assurance for electrical equipment with extremely high requirements for power supply continuity.

[0003] In high-reliability power supply scenarios such as data centers and communication base stations, STS (Switching Transmission System) is the core equipment for achieving seamless switching between multiple power sources. While traditional STS cabinets can provide millisecond-level inter-grid switching capabilities, they still have shortcomings in scenarios involving multi-source distributed energy access, including photovoltaic power generation and diesel generator power generation. Traditional STS cabinets use a single auxiliary power supply design; when the grid fails, the circuit controlling the STS will also fail, and the switching logic will be interrupted. Traditional generator grid connection often relies on manual operation or simple synchronization devices, with the closing inrush current reaching 2-3 times the rated value, causing unit vibration and contact erosion. Furthermore, the lack of safety interlocks between photovoltaic, generator, and grid components poses a risk of parallel short circuits.

[0004] Especially with the popularization of photovoltaic energy storage systems, energy storage batteries are connected to STS cabinets as another energy source through inverters (PCS), which also has the following problems: the traditional mechanical interlock (ATS) has a long switching time and cannot meet the uninterrupted load requirements of data centers, base station communications and other loads; the traditional STS cabinet cannot adapt to photovoltaic fluctuations and generator dynamic characteristics, and the use of extensive grid connection leads to a shortened generator set life.

[0005] Therefore, there is an urgent need for a multi-source input STS cabinet to achieve intelligent switching and safety interlocking control technology. Summary of the Invention

[0006] In view of the above problems, the purpose of this invention is to provide a multi-source coordinated switching and interlocking control method, system and storage medium based on EMS. Combining dual-path auxiliary power redundancy design, dynamic phase synchronization logic, multi-level interlocking mechanism, etc., it can achieve generator-free grid connection, photovoltaic priority scheduling and fault self-checking functions while ensuring power supply switching time, thus providing a fully automatic energy hub solution for high-reliability power supply scenarios.

[0007] The first aspect of this invention provides a multi-source cooperative switching and interlocking control method based on EMS, the method comprising:

[0008] Obtain the power grid status and determine whether the power grid status is in a normal state;

[0009] If so, then close the first switch;

[0010] If not, disconnect the first switch and trigger the dual-auxiliary power supply mechanism;

[0011] Obtain the photovoltaic status and determine whether the photovoltaic status is in an available state;

[0012] If so, then close the third switch;

[0013] If not, the phase difference information is obtained by detecting the DZZB-A module.

[0014] The speed of the oil pump is dynamically adjusted until the phase difference information is lower than the preset phase difference threshold, at which point the fourth switch is closed.

[0015] Determine whether the power grid status has returned to normal.

[0016] If so, then disconnect the third or fourth switch and close the first switch;

[0017] If not, obtain power supply information and load power information;

[0018] Based on the power supply information and the load power information, switch the second switch and adjust the charging and discharging power of the PCS;

[0019] Record the switching event log.

[0020] In this solution, the dual-auxiliary power supply mechanism specifically includes:

[0021] Acquire the first auxiliary power information after AC / DC conversion at the STS input terminal, and the second auxiliary power information after AC / DC conversion at the STS output terminal;

[0022] Determine whether the first auxiliary power information is greater than a preset auxiliary power threshold;

[0023] If so, then the first auxiliary power supply shall be selected;

[0024] If not, then determine whether the second auxiliary power information is greater than the preset auxiliary power threshold;

[0025] If so, then the second auxiliary power supply shall be selected;

[0026] If not, then start the UPS power supply to provide auxiliary power.

[0027] In this solution, the detection of phase difference information via the DZZB-A module specifically involves:

[0028] Based on a preset phase angle sampling period, the first phase angle information of the generator module output voltage and the second phase angle information of the STS bus are obtained.

[0029] The difference between the first phase angle and the second phase angle within the same period is calculated to obtain the phase difference information;

[0030] Determine whether the phase difference information is lower than a preset phase difference threshold three times consecutively;

[0031] If so, then execute the closing logic of the fourth switch;

[0032] If not, the engine speed will be adjusted according to the preset dynamic adjustment logic.

[0033] In this scheme, the closing logic of executing the fourth switch is specifically as follows:

[0034] Obtain the generator voltage information output by the generator module;

[0035] If the frequency of the generator voltage information is within a preset power supply frequency range, and the frequency amplitude of the generator voltage information is within a preset power supply voltage amplitude range, monitor the zero-crossing time of the generator voltage information.

[0036] A closing command is generated at a preset time before the zero-crossing point.

[0037] According to the closing command, the fourth switch is driven to close.

[0038] In this scheme, after executing the closing logic of the fourth switch, an interlocking mechanism is also included, specifically:

[0039] After generating the closing command, obtain the closing status of the fourth switch;

[0040] If the fourth switch is in the closed state, a trip command is sent to the first switch;

[0041] Based on the preset tripping action delay, the closing status of the first switch is obtained;

[0042] If the first switch is closed, the emergency stop mechanism is triggered, forcibly disconnecting the STS output.

[0043] In this solution, the step of switching the second switch and adjusting the charging and discharging power of the PCS based on the power supply information and the load power information specifically involves:

[0044] Calculate the difference between the power supply information and the load power information to obtain the power difference information;

[0045] If the power difference information is greater than zero, the second switch is closed, and the energy storage battery is charged in constant current mode according to the power difference information.

[0046] If the power difference information is less than zero, the second switch is closed, and the energy storage battery is discharged in a constant power mode according to the power difference information.

[0047] A second aspect of the present invention provides a multi-source coordinated switching and interlocking control system based on EMS, including a multi-source coordinated switching and interlocking control method program based on EMS, wherein the multi-source coordinated switching and interlocking control method program based on EMS, when executed by the processor, implements the following steps:

[0048] Obtain the power grid status and determine whether the power grid status is in a normal state;

[0049] If so, then close the first switch;

[0050] If not, disconnect the first switch and trigger the dual-auxiliary power supply mechanism;

[0051] Obtain the photovoltaic status and determine whether the photovoltaic status is in an available state;

[0052] If so, then close the third switch;

[0053] If not, the phase difference information is obtained by detecting the DZZB-A module.

[0054] The speed of the oil pump is dynamically adjusted until the phase difference information is lower than the preset phase difference threshold, at which point the fourth switch is closed.

[0055] Determine whether the power grid status has returned to normal.

[0056] If so, then disconnect the third or fourth switch and close the first switch;

[0057] If not, obtain power supply information and load power information;

[0058] Based on the power supply information and the load power information, switch the second switch and adjust the charging and discharging power of the PCS;

[0059] Record the switching event log.

[0060] In this solution, the dual-auxiliary power supply mechanism specifically includes:

[0061] Acquire the first auxiliary power information after AC / DC conversion at the STS input terminal, and the second auxiliary power information after AC / DC conversion at the STS output terminal;

[0062] Determine whether the first auxiliary power information is greater than a preset auxiliary power threshold;

[0063] If so, then the first auxiliary power supply shall be selected;

[0064] If not, then determine whether the second auxiliary power information is greater than the preset auxiliary power threshold;

[0065] If so, then the second auxiliary power supply shall be selected;

[0066] If not, then start the UPS power supply to provide auxiliary power.

[0067] In this solution, the detection of phase difference information via the DZZB-A module specifically involves:

[0068] Based on a preset phase angle sampling period, the first phase angle information of the generator module output voltage and the second phase angle information of the STS bus are obtained.

[0069] The difference between the first phase angle and the second phase angle within the same period is calculated to obtain the phase difference information;

[0070] Determine whether the phase difference information is lower than a preset phase difference threshold three times consecutively;

[0071] If so, then execute the closing logic of the fourth switch;

[0072] If not, the engine speed will be adjusted according to the preset dynamic adjustment logic.

[0073] A third aspect of the present invention provides a computer-readable storage medium comprising a program for a multi-source coordinated switching and interlocking control method based on EMS, wherein when the program is executed by a processor, it implements the steps of the multi-source coordinated switching and interlocking control method based on EMS as described in any of the preceding claims.

[0074] This invention provides a multi-source coordinated switching and interlocking control method, system, and storage medium based on EMS. First, the grid status is monitored in real time. If an anomaly is detected, a rapid switching operation is achieved through STS (Search and Switch System). Then, photovoltaic power supply is prioritized. When photovoltaic power is unavailable, the phase difference is detected in real time through the DZZB-A module, and the speed is dynamically adjusted based on the phase difference to meet the dynamic grid connection control of the diesel generator, achieving shock-free grid connection. Finally, the PCS (Power Supply System) charging and discharging modes are intelligently switched based on the power supply and load power to improve the stability of the power supply system. Simultaneously, a dual-path auxiliary power redundancy mechanism ensures the working power supply of the STS cabinet, eliminating blind spots in the control circuit during power outages. Furthermore, safety interlocking logic enables automatic disconnection between the grid and the generator, preventing short circuits caused by parallel power supply connections, thus improving the reliability of the power supply system. Attached Figure Description

[0075] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope.

[0076] Figure 1 A connection topology diagram of a multi-source cooperative switching and interlocking control circuit based on EMS is shown.

[0077] Figure 2 A flowchart of a multi-source cooperative switching and interlocking control method based on EMS according to the present invention is shown;

[0078] Figure 3 A flowchart illustrating the operation of a dual-auxiliary power supply mechanism provided in an embodiment of the present invention is shown.

[0079] Figure 4 A flowchart illustrating a phase difference information detection process provided by an embodiment of the present invention is shown.

[0080] Figure 5 A block diagram of a multi-source cooperative switching and interlocking control system based on EMS according to the present invention is shown. Detailed Implementation

[0081] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0082] Unless otherwise defined, all terms (including technical and scientific terms) used in embodiments of this invention shall have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should also be understood that terms such as those defined in a common dictionary shall be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and not as being interpreted in an idealized or highly formalized sense, unless expressly defined in this embodiment of the invention.

[0083] The terms "first," "second," and similar words used in the embodiments of this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "an," "a," or "the" do not indicate a quantity limitation, but rather indicate the presence of at least one. Similarly, terms such as "including" or "comprising" mean that the element or object preceding the word encompasses the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The steps preceding or following the steps in the method of the embodiments of this invention are not necessarily performed precisely in sequence. Instead, various steps can be processed in reverse order or simultaneously. Furthermore, other operations can be added to these processes, or one or more steps can be removed from these processes.

[0084] In addition, the functional modules in the various embodiments of the present invention can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part.

[0085] Figure 1 A connection topology diagram of a multi-source cooperative switching and interlocking control circuit based on EMS is shown.

[0086] like Figure 1 As shown, a multi-source cooperative switching and interlocking control circuit based on EMS includes an STS 102, a PCS 103, a first switch 104, a second switch 105, a third switch 106, a fourth switch 107, and a DZZB-A module 108.

[0087] The first switch controls the power grid connection to the STS input terminal;

[0088] The second switch controls the PCS AC terminal to connect to the STS output terminal;

[0089] The third switch controls the photovoltaic module to connect to the STS output terminal;

[0090] The fourth switch controls the generator module to connect to the STS output terminal based on the phase detection of the DZZB-A module;

[0091] The STS output terminal is connected to a load;

[0092] The DC terminal of the PCS is connected to the energy storage battery.

[0093] Figure 2 A flowchart of a multi-source coordinated switching and interlocking control method based on EMS according to the present invention is shown.

[0094] like Figure 2 As shown, the first aspect of this invention discloses a multi-source cooperative switching and interlocking control method based on EMS, the method comprising:

[0095] S202, Obtain the power grid status and determine whether the power grid status is in a normal state;

[0096] S204, if so, then close the first switch;

[0097] S206, if not, disconnect the first switch and trigger the dual-channel auxiliary power supply mechanism;

[0098] S208, Obtain the photovoltaic status and determine whether the photovoltaic status is in an available state;

[0099] S210, if so, then close the third switch;

[0100] S212, if not, the phase difference information is obtained by detecting the DZZB-A module;

[0101] S214, dynamically adjust the oil engine speed until the phase difference information is lower than the preset phase difference threshold, then close the fourth switch;

[0102] S216, determine whether the power grid state has returned to normal;

[0103] S218, if so, then disconnect the third or fourth switch and close the first switch;

[0104] S220, if not, obtain power supply information and load power information;

[0105] S222, based on the power supply information and the load power information, switch the second switch and adjust the charging and discharging power of the PCS;

[0106] S224, record the switching event log.

[0107] It should be noted that this embodiment provides a core process for multi-source coordinated switching. In this embodiment, the grid voltage status is monitored in real time through the STS (Static Switching System); the grid status includes grid voltage and grid frequency. If the grid voltage or grid frequency exceeds the limit for a set abnormal duration, the grid status is determined to be abnormal; taking a 220V 50Hz grid as an example, the normal range of grid voltage is [198V, 242V], and the normal range of grid frequency is [49.5Hz, 50.5Hz]. If the grid is in a normal state, the first switch is closed, and the grid supplies power to the load through the STS cabinet. If the grid is in an abnormal state, the first switch is opened, and a dual-path auxiliary power mechanism is triggered to ensure continuous power supply to the control circuit. After the first switch is opened, the photovoltaic status is determined by the photovoltaic irradiance; when the photovoltaic irradiance meets the photovoltaic power generation requirements, the photovoltaic system is in a normal state; when the photovoltaic irradiance does not meet the photovoltaic power generation requirements, the photovoltaic system is in an abnormal state. If the photovoltaic system is in a normal state, the third switch is closed, and the photovoltaic system supplies power to the load, achieving photovoltaic grid connection. If the photovoltaic system is in an abnormal state, the load is powered by a diesel generator, achieving grid connection. Before grid connection, the phase difference between the generator voltage and the STS bus voltage is monitored in real time using the DZZB-A module. The generator speed is dynamically adjusted to ensure the phase difference meets grid connection requirements before closing the fourth switch. After grid connection, the recovery status of the power grid is continuously monitored. If the grid returns to normal, the photovoltaic system or generator is disconnected, the first switch is closed, and power is supplied to the load through the grid. If the grid is still in an abnormal state, charging and discharging are performed via the PCS based on the deviation between the photovoltaic or generator's power supply information and the load's power information. Finally, the timestamps of all switch actions and energy parameters are recorded for predictive maintenance. This embodiment achieves rapid switching between the power grid and photovoltaic / diesel generators, improving the reliability of the power supply system.

[0108] Figure 3 The diagram illustrates the operation flowchart of a dual-path auxiliary power supply mechanism provided by an embodiment of the present invention.

[0109] According to embodiments of the present invention, such as Figure 3 As shown, the dual-path auxiliary power supply mechanism specifically includes:

[0110] S302, acquire the first auxiliary power information after AC / DC conversion at the STS input terminal, and the second auxiliary power information after AC / DC conversion at the STS output terminal;

[0111] S304, determine whether the first auxiliary power information is greater than the preset auxiliary power threshold;

[0112] S306, if so, then select the first auxiliary power supply;

[0113] S308, if not, determine whether the second auxiliary power information is greater than the preset auxiliary power threshold;

[0114] If S310 is selected, then the second auxiliary power supply should be used.

[0115] S312, if not, then start the UPS power supply to provide auxiliary power.

[0116] It should be noted that this embodiment includes dual auxiliary power supply paths. The main auxiliary power source is a 24V DC auxiliary power source obtained from the input terminal of the STS (i.e., the main grid input terminal) via an AC / DC converter. The backup auxiliary power source is a 24V DC auxiliary power source obtained from the output terminal of the STS (i.e., the load side) via another AC / DC converter. As one implementation, the auxiliary power threshold is 20V. If the auxiliary power supply voltage is below 20V, it indicates auxiliary power failure. When the voltage of the main and auxiliary power sources is greater than 20V, the main and auxiliary power sources are used preferentially. When the main and auxiliary power sources fail due to grid power outages, AC / DC module malfunctions, or other reasons, the backup auxiliary power source is activated. When the voltage of the backup auxiliary power source is greater than 20V, the backup auxiliary power source is switched to provide power. When both the main and backup auxiliary power sources fail, the built-in UPS is activated to provide backup voltage for a preset duration. As one implementation, the UPS can provide auxiliary power for at least 30 minutes. Furthermore, the auxiliary power status is checked every 100ms. When the duration of the auxiliary power source being in an effective state reaches a set threshold, the auxiliary power source is connected and the UPS is disconnected. This embodiment provides triple power supply protection through a dual-path auxiliary power redundancy design, including main auxiliary power, backup auxiliary power and UPS, to ensure that the EMS can still execute switching logic in the event of a power grid failure.

[0117] Figure 4 A flowchart illustrating a phase difference information detection process provided by an embodiment of the present invention is shown.

[0118] According to embodiments of the present invention, such as Figure 4 As shown, the detection of phase difference information through the DZZB-A module specifically involves:

[0119] S402, based on a preset phase angle sampling period, acquires the first phase angle information of the generator module output voltage and the second phase angle information of the STS bus;

[0120] S404, calculate the difference between the first phase angle information and the second phase angle within the same period to obtain the phase difference information;

[0121] S406, determine whether the phase difference information is lower than the preset phase difference threshold three times in a row;

[0122] If S408 is correct, then execute the closing logic of the fourth switch;

[0123] S410, if not, adjust the engine speed according to the preset dynamic adjustment logic.

[0124] It should be noted that, as one implementation method, a phase angle acquisition period of 10ms is used to acquire the phase angle of the generator output voltage (first phase angle information) and the phase angle of the voltage on the STS AC bus (second phase angle information) in real time. The difference between the first and second phase angles is calculated to obtain the phase difference information. If the phase difference information is lower than the preset phase difference threshold for three consecutive times, it indicates that the generator output voltage has reached the stable grid connection condition, and the closing logic of the fourth switch is executed to realize the generator grid connection. If the grid connection condition is not met, the generator speed is adjusted based on the preset PID control algorithm.

[0125] According to an embodiment of the present invention, the execution of the closing logic of the fourth switch specifically includes:

[0126] Obtain the generator voltage information output by the generator module;

[0127] If the frequency of the generator voltage information is within a preset power supply frequency range, and the frequency amplitude of the generator voltage information is within a preset power supply voltage amplitude range, monitor the zero-crossing time of the generator voltage information.

[0128] A closing command is generated at a preset time before the zero-crossing point.

[0129] According to the closing command, the fourth switch is driven to close.

[0130] It should be noted that this embodiment provides a fourth switch closing logic for generator grid connection. First, the amplitude and frequency of the generator output voltage are detected to ensure they meet power supply requirements. As one implementation, when the generator output voltage amplitude is within the normal range of [198V, 242V] and the generator output voltage frequency is within the normal range of [49.5Hz, 50.5Hz], it indicates that the generator output voltage is ready for grid connection. At this time, the zero-point time of the generator output voltage within each voltage cycle is obtained through zero-point detection. As another implementation, a closing command for the fourth switch is generated and sent 5ms before the zero-point time to drive the fourth switch to close. By avoiding the closing time from the zero-point time, inrush current is prevented, arc burn is reduced, and the switch's lifespan is improved.

[0131] According to an embodiment of the present invention, after executing the closing logic of the fourth switch, an interlocking mechanism is further included, specifically:

[0132] After generating the closing command, obtain the closing status of the fourth switch;

[0133] If the fourth switch is in the closed state, a trip command is sent to the first switch;

[0134] Based on the preset tripping action delay, the closing status of the first switch is obtained;

[0135] If the first switch is closed, the emergency stop mechanism is triggered, forcibly disconnecting the STS output.

[0136] It should be noted that this embodiment provides an interlocking mechanism after the generator is connected to the grid. After generating and sending the closing command for the fourth switch, the closing status of the fourth switch is monitored in real time. When the fourth switch is in the closed state, a tripping command is sent to the first switch to drive it to trip. If the first switch is still in the closed state after the set tripping delay time, it indicates that there is a tripping abnormality in the first switch, such as switch aging. If a tripping abnormality is determined, an emergency stop mechanism is triggered, forcibly disconnecting the output terminal through the STS to prevent the grid from connecting to the load and to prevent the grid and generator from being connected in parallel.

[0137] According to an embodiment of the present invention, the step of switching the second switch and adjusting the charging and discharging power of the PCS based on the power supply information and the load power information specifically includes:

[0138] Calculate the difference between the power supply information and the load power information to obtain the power difference information;

[0139] If the power difference information is greater than zero, the second switch is closed, and the energy storage battery is charged in constant current mode according to the power difference information.

[0140] If the power difference information is less than zero, the second switch is closed, and the energy storage battery is discharged in a constant power mode according to the power difference information.

[0141] It should be noted that this embodiment provides a charging and discharging control logic for an inverter. In this embodiment, when the photovoltaic or generator is connected to the grid, due to the dynamic changes in the power supply and load power, this embodiment controls the charging and discharging of the energy storage battery through the inverter (PCS): when the power supply is higher than the load power, it indicates that the photovoltaic or generator power generation is high, and the remaining power is supplemented to the energy storage battery in a preset constant current mode; when the power supply is lower than the load power, it indicates that the photovoltaic or generator power generation is insufficient, and the energy storage battery releases electrical energy to supplement the power gap required by the load according to a preset constant power mode. This embodiment uses the PCS and energy storage battery as energy intermediaries to store excess generated energy and supplement insufficient demand energy.

[0142] It is worth mentioning that a safety check is also included before closing the first switch, specifically:

[0143] Obtain the closing status of the fourth switch;

[0144] If the fourth switch is in the closed state, a trip command is sent to the fourth switch.

[0145] Determine whether the fourth switch has successfully tripped;

[0146] If so, the first switch will be closed again according to the preset closing operation delay;

[0147] If not, the first switch closing circuit will be locked and a fault alarm will be issued.

[0148] It should be noted that this embodiment provides an interlocking mechanism before grid connection. The closing status of the fourth switch is monitored in real time. If the fourth switch is closed, a tripping command is sent to it, driving it to trip. If the fourth switch trips successfully, a preset closing operation delay is waited before the first switch is closed to ensure the generator is completely deactivated. If the fourth switch trips unsuccessfully, the first switch closing circuit is locked, and an audible and visual alarm is triggered; the alarm signal triggers a maintenance response, improving repair efficiency.

[0149] It is worth mentioning that it also includes a predictive maintenance mechanism for multi-energy coordinated switching based on logs, specifically including:

[0150] Extract the opening and closing timestamp sequences of the first, third, and fourth switches from the log;

[0151] Based on the timestamp sequence, calculate the time interval between adjacent opening and closing operations of the same switch, and mark the over-limit event according to the preset time over-limit range;

[0152] Within a preset over-limit period, when the cumulative number of over-limit events for the same switch reaches a preset number, a mechanical life warning signal for the switch is generated.

[0153] It should be noted that this embodiment provides a predictive maintenance mechanism. In this embodiment, the opening and closing timestamps of the first, third, and fourth switches are extracted from the log file to form a corresponding timestamp sequence. Based on the timestamp sequence of each switch, the time interval between adjacent opening and closing operations is calculated. When the time interval is lower than the set minimum time interval threshold for opening and closing, it is marked as an over-limit event, indicating that the switch switching is too frequent and there is an anomaly. If more than 5 over-limit events are detected within a preset over-limit period, for example, more than 5 times per week, it indicates that the switch is abnormal, and a mechanical life warning signal is generated, thereby improving the maintenance response efficiency.

[0154] It is worth mentioning that the system also includes log-based diagnostic logic for multi-energy coordinated switching faults, specifically including:

[0155] When recording the switching event log, the PCS status code, PCS charging and discharging waveform and engine speed curve are collected and recorded simultaneously to obtain multi-source log data;

[0156] Align the multi-source log data according to timestamps;

[0157] When a switch switching failure event is detected, multi-source log data within a preset log time period is extracted based on the timestamp to obtain the first multi-source log data;

[0158] Based on the first multi-source log data, anomalies are marked, including generator grid connection delays greater than a preset generator grid connection time threshold or photovoltaic power surges exceeding a preset photovoltaic surge percentage.

[0159] The first multi-source log data and the marked anomalies are input into a pre-trained LSTM neural network model to obtain the root cause probability distribution of the fault.

[0160] Based on the probability distribution of the root causes of the fault, the diagnostic results are appended to the end of the log file.

[0161] It should be noted that this embodiment provides a fault diagnosis logic based on a neural network model. The PCS status code, PCS charging / discharging waveform, generator speed curve, and switchover log are combined as multi-source log data. When a switchover failure event occurs, as one implementation, the multi-source log data for the 30 seconds preceding the failure event is extracted as the first multi-source log data. The first multi-source log data is marked according to preset anomaly marking rules; for example, when generator speed regulation fails, the generator grid connection time will exceed a preset grid connection time threshold; when cloud cover or photovoltaic panel string failure occurs, the photovoltaic power surge will exceed a set percentage threshold. The first multi-source log data and anomalies are input into a pre-trained LSTM neural network model to obtain the fault root cause probability distribution. The top three fault root causes, ranked from highest to lowest probability, are appended to the end of the log file. The neural network model is then trained online based on user feedback.

[0162] Figure 5 A block diagram of a multi-source cooperative switching and interlocking control system based on EMS according to the present invention is shown.

[0163] like Figure 5 As shown, the second aspect of the present invention discloses a multi-source coordinated switching and interlocking control system 5 based on EMS, including a memory 51 and a processor 52. The memory includes a program for a multi-source coordinated switching and interlocking control method based on EMS. When the processor executes the program for the multi-source coordinated switching and interlocking control method based on EMS, it performs the following steps:

[0164] Obtain the power grid status and determine whether the power grid status is in a normal state;

[0165] If so, then close the first switch;

[0166] If not, disconnect the first switch and trigger the dual-auxiliary power supply mechanism;

[0167] Obtain the photovoltaic status and determine whether the photovoltaic status is in an available state;

[0168] If so, then close the third switch;

[0169] If not, the phase difference information is obtained by detecting the DZZB-A module.

[0170] The speed of the oil pump is dynamically adjusted until the phase difference information is lower than the preset phase difference threshold, at which point the fourth switch is closed.

[0171] Determine whether the power grid status has returned to normal.

[0172] If so, then disconnect the third or fourth switch and close the first switch;

[0173] If not, obtain power supply information and load power information;

[0174] Based on the power supply information and the load power information, switch the second switch and adjust the charging and discharging power of the PCS;

[0175] Record the switching event log.

[0176] It should be noted that this embodiment provides a core process for multi-source coordinated switching. In this embodiment, the grid voltage status is monitored in real time through the STS (Static Switching System); the grid status includes grid voltage and grid frequency. If the grid voltage or grid frequency exceeds the limit for a set abnormal duration, the grid status is determined to be abnormal; taking a 220V 50Hz grid as an example, the normal range of grid voltage is [198V, 242V], and the normal range of grid frequency is [49.5Hz, 50.5Hz]. If the grid is in a normal state, the first switch is closed, and the grid supplies power to the load through the STS cabinet. If the grid is in an abnormal state, the first switch is opened, and a dual-path auxiliary power mechanism is triggered to ensure continuous power supply to the control circuit. After the first switch is opened, the photovoltaic status is determined by the photovoltaic irradiance; when the photovoltaic irradiance meets the photovoltaic power generation requirements, the photovoltaic system is in a normal state; when the photovoltaic irradiance does not meet the photovoltaic power generation requirements, the photovoltaic system is in an abnormal state. If the photovoltaic system is in a normal state, the third switch is closed, and the photovoltaic system supplies power to the load, achieving photovoltaic grid connection. If the photovoltaic system is in an abnormal state, the load is powered by a diesel generator, achieving grid connection. Before grid connection, the phase difference between the generator voltage and the STS bus voltage is monitored in real time using the DZZB-A module. The generator speed is dynamically adjusted to ensure the phase difference meets grid connection requirements before closing the fourth switch. After grid connection, the recovery status of the power grid is continuously monitored. If the grid returns to normal, the photovoltaic system or generator is disconnected, the first switch is closed, and power is supplied to the load through the grid. If the grid is still in an abnormal state, charging and discharging are performed via the PCS based on the deviation between the photovoltaic or generator's power supply information and the load's power information. Finally, the timestamps of all switch actions and energy parameters are recorded for predictive maintenance. This embodiment achieves rapid switching between the power grid and photovoltaic / diesel generators, improving the reliability of the power supply system.

[0177] According to an embodiment of the present invention, the dual-path auxiliary power supply mechanism specifically includes:

[0178] Acquire the first auxiliary power information after AC / DC conversion at the STS input terminal, and the second auxiliary power information after AC / DC conversion at the STS output terminal;

[0179] Determine whether the first auxiliary power information is greater than a preset auxiliary power threshold;

[0180] If so, then the first auxiliary power supply shall be selected;

[0181] If not, then determine whether the second auxiliary power information is greater than the preset auxiliary power threshold;

[0182] If so, then the second auxiliary power supply shall be selected;

[0183] If not, then start the UPS power supply to provide auxiliary power.

[0184] It should be noted that this embodiment includes dual auxiliary power supply paths. The main auxiliary power source is a 24V DC auxiliary power source obtained from the input terminal of the STS (i.e., the main grid input terminal) via an AC / DC converter. The backup auxiliary power source is a 24V DC auxiliary power source obtained from the output terminal of the STS (i.e., the load side) via another AC / DC converter. As one implementation, the auxiliary power threshold is 20V. If the auxiliary power supply voltage is below 20V, it indicates auxiliary power failure. When the voltage of the main and auxiliary power sources is greater than 20V, the main and auxiliary power sources are used preferentially. When the main and auxiliary power sources fail due to grid power outages, AC / DC module malfunctions, or other reasons, the backup auxiliary power source is activated. When the voltage of the backup auxiliary power source is greater than 20V, the backup auxiliary power source is switched to provide power. When both the main and backup auxiliary power sources fail, the built-in UPS is activated to provide backup voltage for a preset duration. As one implementation, the UPS can provide auxiliary power for at least 30 minutes. Furthermore, the auxiliary power status is checked every 100ms. When the duration of the auxiliary power source being in an effective state reaches a set threshold, the auxiliary power source is connected and the UPS is disconnected. This embodiment provides triple power supply protection through a dual-path auxiliary power redundancy design, including main auxiliary power, backup auxiliary power and UPS, to ensure that the EMS can still execute switching logic in the event of a power grid failure.

[0185] According to an embodiment of the present invention, the detection of phase difference information by the DZZB-A module specifically includes:

[0186] Based on a preset phase angle sampling period, the first phase angle information of the generator module output voltage and the second phase angle information of the STS bus are obtained.

[0187] The difference between the first phase angle and the second phase angle within the same period is calculated to obtain the phase difference information;

[0188] Determine whether the phase difference information is lower than a preset phase difference threshold three times consecutively;

[0189] If so, then execute the closing logic of the fourth switch;

[0190] If not, the engine speed will be adjusted according to the preset dynamic adjustment logic.

[0191] It should be noted that, as one implementation method, a phase angle acquisition period of 10ms is used to acquire the phase angle of the generator output voltage (first phase angle information) and the phase angle of the voltage on the STS AC bus (second phase angle information) in real time. The difference between the first and second phase angles is calculated to obtain the phase difference information. If the phase difference information is lower than the preset phase difference threshold for three consecutive times, it indicates that the generator output voltage has reached the stable grid connection condition, and the closing logic of the fourth switch is executed to realize the generator grid connection. If the grid connection condition is not met, the generator speed is adjusted based on the preset PID control algorithm.

[0192] According to an embodiment of the present invention, the execution of the closing logic of the fourth switch specifically includes:

[0193] Obtain the generator voltage information output by the generator module;

[0194] If the frequency of the generator voltage information is within a preset power supply frequency range, and the frequency amplitude of the generator voltage information is within a preset power supply voltage amplitude range, monitor the zero-crossing time of the generator voltage information.

[0195] A closing command is generated at a preset time before the zero-crossing point.

[0196] According to the closing command, the fourth switch is driven to close.

[0197] It should be noted that this embodiment provides a fourth switch closing logic for generator grid connection. First, the amplitude and frequency of the generator output voltage are detected to ensure they meet power supply requirements. As one implementation, when the generator output voltage amplitude is within the normal range of [198V, 242V] and the generator output voltage frequency is within the normal range of [49.5Hz, 50.5Hz], it indicates that the generator output voltage is ready for grid connection. At this time, the zero-point time of the generator output voltage within each voltage cycle is obtained through zero-point detection. As another implementation, a closing command for the fourth switch is generated and sent 5ms before the zero-point time to drive the fourth switch to close. By avoiding the closing time from the zero-point time, inrush current is prevented, arc burn is reduced, and the switch's lifespan is improved.

[0198] According to an embodiment of the present invention, after executing the closing logic of the fourth switch, an interlocking mechanism is further included, specifically:

[0199] After generating the closing command, obtain the closing status of the fourth switch;

[0200] If the fourth switch is in the closed state, a trip command is sent to the first switch;

[0201] Based on the preset tripping action delay, the closing status of the first switch is obtained;

[0202] If the first switch is closed, the emergency stop mechanism is triggered, forcibly disconnecting the STS output.

[0203] It should be noted that this embodiment provides an interlocking mechanism after the generator is connected to the grid. After generating and sending the closing command for the fourth switch, the closing status of the fourth switch is monitored in real time. When the fourth switch is in the closed state, a tripping command is sent to the first switch to drive it to trip. If the first switch is still in the closed state after the set tripping delay time, it indicates that there is a tripping abnormality in the first switch, such as switch aging. If a tripping abnormality is determined, an emergency stop mechanism is triggered, forcibly disconnecting the output terminal through the STS to prevent the grid from connecting to the load and to prevent the grid and generator from being connected in parallel.

[0204] According to an embodiment of the present invention, the step of switching the second switch and adjusting the charging and discharging power of the PCS based on the power supply information and the load power information specifically includes:

[0205] Calculate the difference between the power supply information and the load power information to obtain the power difference information;

[0206] If the power difference information is greater than zero, the second switch is closed, and the energy storage battery is charged in constant current mode according to the power difference information.

[0207] If the power difference information is less than zero, the second switch is closed, and the energy storage battery is discharged in a constant power mode according to the power difference information.

[0208] It should be noted that this embodiment provides a charging and discharging control logic for an inverter. In this embodiment, when the photovoltaic or generator is connected to the grid, due to the dynamic changes in the power supply and load power, this embodiment controls the charging and discharging of the energy storage battery through the inverter (PCS): when the power supply is higher than the load power, it indicates that the photovoltaic or generator power generation is high, and the remaining power is supplemented to the energy storage battery in a preset constant current mode; when the power supply is lower than the load power, it indicates that the photovoltaic or generator power generation is insufficient, and the energy storage battery releases electrical energy to supplement the power gap required by the load according to a preset constant power mode. This embodiment uses the PCS and energy storage battery as energy intermediaries to store excess generated energy and supplement insufficient demand energy.

[0209] It is worth mentioning that a safety check is also included before closing the first switch, specifically:

[0210] Obtain the closing status of the fourth switch;

[0211] If the fourth switch is in the closed state, a trip command is sent to the fourth switch.

[0212] Determine whether the fourth switch has successfully tripped;

[0213] If so, the first switch will be closed again according to the preset closing operation delay;

[0214] If not, the first switch closing circuit will be locked and a fault alarm will be issued.

[0215] It should be noted that this embodiment provides an interlocking mechanism before grid connection. The closing status of the fourth switch is monitored in real time. If the fourth switch is closed, a tripping command is sent to it, driving it to trip. If the fourth switch trips successfully, a preset closing operation delay is waited before the first switch is closed to ensure the generator is completely deactivated. If the fourth switch trips unsuccessfully, the first switch closing circuit is locked, and an audible and visual alarm is triggered; the alarm signal triggers a maintenance response, improving repair efficiency.

[0216] It is worth mentioning that it also includes a predictive maintenance mechanism for multi-energy coordinated switching based on logs, specifically including:

[0217] Extract the opening and closing timestamp sequences of the first, third, and fourth switches from the log;

[0218] Based on the timestamp sequence, calculate the time interval between adjacent opening and closing operations of the same switch, and mark the over-limit event according to the preset time over-limit range;

[0219] Within a preset over-limit period, when the cumulative number of over-limit events for the same switch reaches a preset number, a mechanical life warning signal for the switch is generated.

[0220] It should be noted that this embodiment provides a predictive maintenance mechanism. In this embodiment, the opening and closing timestamps of the first, third, and fourth switches are extracted from the log file to form a corresponding timestamp sequence. Based on the timestamp sequence of each switch, the time interval between adjacent opening and closing operations is calculated. When the time interval is lower than the set minimum time interval threshold for opening and closing, it is marked as an over-limit event, indicating that the switch switching is too frequent and there is an anomaly. If more than 5 over-limit events are detected within a preset over-limit period, for example, more than 5 times per week, it indicates that the switch is abnormal, and a mechanical life warning signal is generated, thereby improving the maintenance response efficiency.

[0221] It is worth mentioning that the system also includes log-based diagnostic logic for multi-energy coordinated switching faults, specifically including:

[0222] When recording the switching event log, the PCS status code, PCS charging and discharging waveform and engine speed curve are collected and recorded simultaneously to obtain multi-source log data;

[0223] Align the multi-source log data according to timestamps;

[0224] When a switch switching failure event is detected, multi-source log data within a preset log time period is extracted based on the timestamp to obtain the first multi-source log data;

[0225] Based on the first multi-source log data, anomalies are marked, including generator grid connection delays greater than a preset generator grid connection time threshold or photovoltaic power surges exceeding a preset photovoltaic surge percentage.

[0226] The first multi-source log data and the marked anomalies are input into a pre-trained LSTM neural network model to obtain the root cause probability distribution of the fault.

[0227] Based on the probability distribution of the root causes of the fault, the diagnostic results are appended to the end of the log file.

[0228] It should be noted that this embodiment provides a fault diagnosis logic based on a neural network model. The PCS status code, PCS charging / discharging waveform, generator speed curve, and switchover log are combined as multi-source log data. When a switchover failure event occurs, as one implementation, the multi-source log data for the 30 seconds preceding the failure event is extracted as the first multi-source log data. The first multi-source log data is marked according to preset anomaly marking rules; for example, when generator speed regulation fails, the generator grid connection time will exceed a preset grid connection time threshold; when cloud cover or photovoltaic panel string failure occurs, the photovoltaic power surge will exceed a set percentage threshold. The first multi-source log data and anomalies are input into a pre-trained LSTM neural network model to obtain the fault root cause probability distribution. The top three fault root causes, ranked from highest to lowest probability, are appended to the end of the log file. The neural network model is then trained online based on user feedback.

[0229] A third aspect of the present invention provides a computer-readable storage medium comprising a program for a multi-source coordinated switching and interlocking control method based on EMS, wherein when the program is executed by a processor, it implements the steps of the multi-source coordinated switching and interlocking control method based on EMS as described in any of the preceding claims.

[0230] In summary, this invention provides a multi-source coordinated switching and interlocking control method, system, and storage medium based on EMS. First, it monitors the grid status in real time; if an anomaly occurs, a rapid switching operation is achieved through STS. Then, it prioritizes photovoltaic power supply; when photovoltaic power is unavailable, the phase difference is detected in real time through the DZZB-A module, and the speed is dynamically adjusted based on the phase difference to meet the dynamic grid connection control of the generator, achieving shock-free grid connection. Finally, based on the power supply and load power, the PCS charging and discharging modes are intelligently switched to improve the stability of the power supply system. Simultaneously, a dual-path auxiliary power redundancy mechanism ensures the working power supply of the STS cabinet, eliminating blind spots in the control circuit during power outages. Furthermore, safety interlocking logic enables automatic disconnection between the grid and the generator, preventing short circuits caused by parallel power supply connections, thus improving the reliability of the power supply system.

[0231] If the aforementioned functions are implemented as software functional modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this invention, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0232] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A multi-source coordinated switching and interlocking control method based on EMS, applied to a multi-source coordinated switching and interlocking control circuit based on EMS, the circuit including STS, PCS, a first switch, a second switch, a third switch, a fourth switch and a DZZB-A module; The first switch controls the grid to connect to the STS input terminal, the second switch controls the PCS AC terminal to connect to the STS output terminal, the third switch controls the photovoltaic module to connect to the STS output terminal, the fourth switch controls the generator module to connect to the STS output terminal according to the phase detection of the DZZB-A module, the STS output terminal is connected to the load, and the DC terminal of the PCS is connected to the energy storage battery. Its features are, The method includes: Obtain the power grid status and determine whether the power grid status is in a normal state; If so, then close the first switch; If not, disconnect the first switch and trigger the dual-auxiliary power supply mechanism; Obtain the photovoltaic status and determine whether the photovoltaic status is in an available state; If so, then close the third switch; If not, the phase difference information is obtained by detecting the DZZB-A module. The speed of the oil pump is dynamically adjusted until the phase difference information is lower than the preset phase difference threshold, at which point the fourth switch is closed. Determine whether the power grid status has returned to normal. If so, then disconnect the third or fourth switch and close the first switch; If not, obtain power supply information and load power information; Based on the power supply information and the load power information, the second switch is switched and the charging and discharging power of the PCS is adjusted. Specifically, this includes: calculating the difference between the power supply information and the load power information to obtain power difference information; if the power difference information is greater than zero, the second switch is closed, and the energy storage battery is charged in constant current mode according to the power difference information; if the power difference information is less than zero, the second switch is closed, and the energy storage battery is discharged in constant power mode according to the power difference information. Record the switching event log.

2. The multi-source cooperative switching and interlocking control method based on EMS according to claim 1, characterized in that, The dual-path auxiliary power supply mechanism specifically includes: Acquire the first auxiliary power information after AC / DC conversion at the STS input terminal, and the second auxiliary power information after AC / DC conversion at the STS output terminal; Determine whether the first auxiliary power information is greater than a preset auxiliary power threshold; If so, then the first auxiliary power supply shall be selected; If not, then determine whether the second auxiliary power information is greater than the preset auxiliary power threshold; If so, then the second auxiliary power supply shall be selected; If not, then start the UPS power supply to provide auxiliary power.

3. The multi-source cooperative switching and interlocking control method based on EMS according to claim 1, characterized in that, The detection of phase difference information via the DZZB-A module specifically involves: Based on a preset phase angle sampling period, the first phase angle information of the generator module output voltage and the second phase angle information of the STS bus are obtained. The difference between the first phase angle and the second phase angle within the same period is calculated to obtain the phase difference information; Determine whether the phase difference information is lower than a preset phase difference threshold three times consecutively; If so, then execute the closing logic of the fourth switch; If not, the engine speed will be adjusted according to the preset dynamic adjustment logic.

4. The multi-source cooperative switching and interlocking control method based on EMS according to claim 3, characterized in that, The closing logic for executing the fourth switch is specifically as follows: Obtain the generator voltage information output by the generator module; If the frequency of the generator voltage information is within a preset power supply frequency range, and the frequency amplitude of the generator voltage information is within a preset power supply voltage amplitude range, monitor the zero-crossing time of the generator voltage information. A closing command is generated at a preset time before the zero-crossing point. According to the closing command, the fourth switch is driven to close.

5. The multi-source cooperative switching and interlocking control method based on EMS according to claim 4, characterized in that, After executing the closing logic of the fourth switch, an interlocking mechanism is also included, specifically: After generating the closing command, obtain the closing status of the fourth switch; If the fourth switch is in the closed state, a trip command is sent to the first switch; Based on the preset tripping action delay, the closing status of the first switch is obtained; If the first switch is closed, the emergency stop mechanism is triggered, forcibly disconnecting the STS output.

6. A multi-source coordinated switching and interlocking control system based on EMS, applied to a multi-source coordinated switching and interlocking control circuit based on EMS, the circuit including STS, PCS, a first switch, a second switch, a third switch, a fourth switch and a DZZB-A module; The first switch controls the grid to connect to the STS input terminal, the second switch controls the PCS AC terminal to connect to the STS output terminal, the third switch controls the photovoltaic module to connect to the STS output terminal, the fourth switch controls the generator module to connect to the STS output terminal according to the phase detection of the DZZB-A module, the STS output terminal is connected to the load, and the DC terminal of the PCS is connected to the energy storage battery. Its features are, The system includes a memory and a processor. The memory includes a program for a multi-source coordinated handover and interlock control method based on EMS. When the processor executes the EMS-based multi-source coordinated handover and interlock control method program, it performs the following steps: Obtain the power grid status and determine whether the power grid status is in a normal state; If so, then close the first switch; If not, disconnect the first switch and trigger the dual-auxiliary power supply mechanism; Obtain the photovoltaic status and determine whether the photovoltaic status is in an available state; If so, then close the third switch; If not, the phase difference information is obtained by detecting the DZZB-A module. The speed of the oil pump is dynamically adjusted until the phase difference information is lower than the preset phase difference threshold, at which point the fourth switch is closed. Determine whether the power grid status has returned to normal. If so, then disconnect the third or fourth switch and close the first switch; If not, obtain power supply information and load power information; Based on the power supply information and the load power information, the second switch is switched and the charging and discharging power of the PCS is adjusted. Specifically, this includes: calculating the difference between the power supply information and the load power information to obtain power difference information; if the power difference information is greater than zero, the second switch is closed, and the energy storage battery is charged in constant current mode according to the power difference information; if the power difference information is less than zero, the second switch is closed, and the energy storage battery is discharged in constant power mode according to the power difference information. Record the switching event log.

7. A multi-source cooperative switching and interlocking control system based on EMS according to claim 6, characterized in that, The dual-path auxiliary power supply mechanism specifically includes: Acquire the first auxiliary power information after AC / DC conversion at the STS input terminal, and the second auxiliary power information after AC / DC conversion at the STS output terminal; Determine whether the first auxiliary power information is greater than a preset auxiliary power threshold; If so, then the first auxiliary power supply shall be selected; If not, then determine whether the second auxiliary power information is greater than the preset auxiliary power threshold; If so, then the second auxiliary power supply shall be selected; If not, then start the UPS power supply to provide auxiliary power.

8. A multi-source cooperative switching and interlocking control system based on EMS according to claim 6, characterized in that, The detection of phase difference information via the DZZB-A module specifically involves: Based on a preset phase angle sampling period, the first phase angle information of the generator module output voltage and the second phase angle information of the STS bus are obtained. The difference between the first phase angle and the second phase angle within the same period is calculated to obtain the phase difference information; Determine whether the phase difference information is lower than a preset phase difference threshold three times consecutively; If so, then execute the closing logic of the fourth switch; If not, the engine speed will be adjusted according to the preset dynamic adjustment logic.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, The computer-readable storage medium includes a program for a multi-source coordinated switching and interlocking control method based on EMS. When the program is executed by a processor, it implements the steps of the multi-source coordinated switching and interlocking control method based on EMS as described in any one of claims 1 to 5.

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