MPPT inverter all-in-one machine PCS intelligent hibernation method and system

Abstract

This invention discloses an intelligent sleep mode method and system for an MPPT inverter integrated machine PCS, comprising the following steps: System initialization step: After power-on, both the MPPT charging controller module and the PCS energy storage converter module enter normal working state; Operation status monitoring step: The MPPT charging controller module collects system operation status parameters in real time; Sleep condition judgment step: The sleep judgment logic unit embedded in the main control chip of the MPPT charging controller module determines whether the preset sleep condition is met; Execution of PCS energy storage converter module power-off sleep step: When the sleep condition is met, the PCS energy storage converter module is powered off and enters physical sleep state; Activation condition monitoring step: During the sleep period of the PCS energy storage converter module, the low-power detection circuit is kept running to continuously monitor the activation condition of the PCS energy storage converter module; Execution of PCS energy storage converter module automatic activation step. This invention realizes power-off sleep and automatic instant activation of the PCS in MPPT-only mode, reducing standby power consumption.

Description

Technical Field

[0001] This invention relates to the field of energy storage technology, and in particular to an MPPT inverter control integrated PCS intelligent sleep method and system. Background Technology

[0002] With the rapid development of photovoltaic power generation technology, MPPT inverter-controller integrated units have been widely used in residential and commercial photovoltaic energy storage systems due to their advantages such as high integration, convenient installation, and low cost. A typical MPPT inverter-controller integrated unit includes two core functional modules: the MPPT module, which is responsible for the maximum power point tracking and DC charging management of the photovoltaic array; and the PCS module, which is responsible for DC-AC conversion, grid-connected / off-grid inverter, and energy storage battery charging and discharging management. In existing technical solutions, even if the system only performs MPPT photovoltaic charging (without AC load requirements or grid-connected output requirements), the control circuit, drive circuit, auxiliary power supply, and communication module of the PCS module are still in operation, generating significant self-consumption and severely reducing the overall system efficiency. Summary of the Invention

[0003] The purpose of this invention is to provide a method and system for intelligent sleep mode of PCS in MPPT inverter control integrated machine, which aims to solve the technical problems of high power consumption and inability to automatically activate the PCS part in the MPPT-only working mode in the prior art.

[0004] According to the first aspect of this application, a method for intelligent sleep mode of an MPPT inverter integrated machine PCS is provided, comprising the following steps: S1, System initialization step: After power-on, both the MPPT charging controller module and the PCS energy storage converter module enter normal working state, the main relay and auxiliary power supply relay are closed by default, and the PCS energy storage converter module is powered on; S2, Operation status monitoring step: The MPPT charging controller module collects system operation status parameters in real time; S3, Sleep condition judgment step: The sleep judgment logic unit embedded in the main control chip of the MPPT charging controller module judges whether the current sleep condition is met, wherein the preset sleep condition is that the system is in the MPPT photovoltaic charging only working mode and the PCS energy storage converter module does not need to participate in the work; S4, Execute PCS energy storage converter module power-off sleep step: When the sleep condition is met, a PCS energy storage converter module shutdown command is sent and the PCS energy storage converter module is waited to complete the current task, and the module is controlled by the relay drive module. S5. Activation Condition Monitoring Step: During the PCS energy storage converter module's sleep period, the low-power detection circuit is kept running to continuously monitor the PCS energy storage converter module's activation conditions. S6. Automatic Activation Step for PCS Energy Storage Converter Module: When the activation conditions are met, the activation judgment logic unit embedded in the main control chip outputs an activation control command. First, the auxiliary power supply relay is closed to perform a soft-start pre-charge of the PCS energy storage converter module through the auxiliary power pre-charge circuit. After a delay until the auxiliary power supply voltage stabilizes, the main relay is closed to connect the PCS energy storage converter module's main power supply circuit. The PCS energy storage converter module is then powered on, initialized, and establishes a communication handshake with the MPPT charging controller module, entering normal operating status.

[0005] Preferably, the system operating status parameters in S2 include photovoltaic input power, energy storage battery state of charge (SOC), AC side load power, and communication status.

[0006] Preferably, the preset sleep conditions in S3 include: photovoltaic input power is lower than a preset sleep power threshold, energy storage battery SOC is less than the charging cutoff value, there is no AC load or the load power is less than the threshold, there is no grid connection dispatch command, and there is no PCS energy storage converter module active working request, and the above conditions are continuously met for more than a preset delay.

[0007] Preferably, the activation conditions in S5 include any of the following: the photovoltaic input power recovers to or exceeds a preset activation power threshold for a preset duration; an AC load is connected and its power is greater than the threshold; a grid connection scheduling command is received; the battery management system requests battery discharge; the energy storage battery SOC reaches the charging cutoff value; system fault protection requirements; a user remote wake-up command; or a timed wake-up signal.

[0008] Preferably, after the S2 operation status monitoring step and before the S3 sleep condition judgment step, the following steps are also included: S21, shared current limiting step: the current limit of the multiple photovoltaic input interfaces is changed from independent hard allocation to dynamic allocation of shared total current pool, and the sum of the output current of each photovoltaic input interface does not exceed the preset total current limit.

[0009] Preferably, the S21 shared current limiting step specifically includes: S211, synchronously sampling the output current of each photovoltaic input interface and calculating the total current; S212, when the total current does not exceed the total current limit, not interfering with the independent maximum power point tracking operation of each photovoltaic input interface; S213, when the total current exceeds the total current limit, starting the arbitration derating algorithm, and derating the current of each channel according to a preset mode, the preset mode including equal proportional derating mode, priority derating mode or efficiency priority derating mode.

[0010] Preferably, the step S6 for automatically activating the PCS energy storage converter module further includes: starting a timer after closing the main relay and detecting that the auxiliary power supply voltage is stable; if a handshake signal indicating normal startup of the PCS energy storage converter module is not received within a preset maximum time, the activation is deemed to have failed; automatically disconnecting the main relay and the auxiliary power supply relay, and retrying activation after a delay, for a maximum of a preset number of attempts; if multiple attempts fail, triggering an audible and visual alarm and reporting the fault to the remote monitoring platform.

[0011] According to a second aspect of this application, an MPPT inverter integrated machine PCS intelligent sleep system is provided, comprising: an MPPT charging controller module, including at least one photovoltaic input interface for electrical connection to a photovoltaic array, and its output terminal for electrical connection to an energy storage battery; the main control chip of the MPPT charging controller module embeds a sleep judgment logic unit and an activation judgment logic unit; a PCS energy storage converter module for realizing DC-AC conversion, grid-connected / off-grid inverter, and energy storage battery charging and discharging management; and an intelligent relay control unit disposed between the MPPT charging controller module and the PCS energy storage converter module, the intelligent relay control unit comprising: a relay module connected in series in the power supply circuit of the PCS energy storage converter module for controlling the on / off state of the power supply circuit of the PCS energy storage converter module; the relay module including a main relay and an auxiliary power supply relay; the main relay for controlling the on / off state of the main power supply circuit of the PCS energy storage converter module; and the auxiliary power supply relay connected in series with a pre-charging resistor and then connected in parallel across the two ends of the main relay for controlling the on / off state of the auxiliary power pre-charging circuit; and a relay drive module. The system comprises a main control unit, directly controlled by the main control chip of the MPPT charging controller module, used to drive the main relay and the auxiliary power supply relay to switch on and off according to a preset timing sequence; a PCS activation detection module, used to continuously monitor the activation conditions and send activation detection signals to the main control chip during the sleep period of the PCS energy storage converter module; and a non-volatile storage unit, communicatively connected to the main control chip, used to record the sleep state flag bit. The sleep judgment logic unit is configured to control the main relay and the auxiliary power supply relay to disconnect when a preset sleep condition is met. The preset sleep condition is that the system is in MPPT photovoltaic charging-only working mode and the PCS energy storage converter module does not need to participate in the operation. The activation judgment logic unit is configured to, when receiving the activation detection signal sent by the PCS activation detection module and determining that the preset activation condition is met, first control the auxiliary power supply relay to close according to a preset timing sequence to perform soft-start pre-charging of the PCS energy storage converter module through the auxiliary power pre-charging circuit, and then control the main relay to close to connect the main power supply circuit after a delay until the auxiliary power supply voltage stabilizes.

[0012] Preferably, the photovoltaic input interface has two ports, and the MPPT charging controller module further includes a shared current limiting module. The shared current limiting module includes a shared total current loop control unit and a dynamic allocation arbitration unit. The two photovoltaic input interfaces are electrically connected to two photovoltaic arrays respectively. The shared total current loop control unit performs unified limiting management of the total current of the two inputs. The dynamic allocation arbitration unit dynamically allocates the total current limit based on the real-time power ratio or preset priority of the two photovoltaic inputs. The shared current limiting module also includes: a single-channel hard upper limit protection unit, which is set at each photovoltaic input interface to set the absolute safe current upper limit for a single channel; and a total upper limit soft sharing unit, which is connected to the shared total current loop control unit to set the shared total current upper limit for the two channels. Normally, the two channels operate independently. When the current of one channel does not reach the single-channel hard upper limit and the other channel needs to exceed the limit, the idle limit is dynamically allocated to the channel that needs it through the dynamic allocation arbitration unit.

[0013] Preferably, the main control chip also has an embedded activation failure protection unit. The activation failure protection unit starts timing after the main relay is closed and the auxiliary power supply voltage is detected to be stable. If a handshake signal for normal start of the PCS energy storage converter module is not received within a preset maximum time, it is judged as activation failure, and the main relay and auxiliary power supply relay are automatically disconnected. After a delay, the activation is retried, with a maximum of a preset number of attempts. If multiple attempts fail, an audible and visual alarm is triggered and the fault is reported to the remote monitoring platform.

[0014] The beneficial effects of this invention are as follows: The MPPT inverter integrated machine PCS intelligent sleep method and system provided by the above technical solution controls the main relay and auxiliary power supply relay to disconnect sequentially through the relay drive module. In the MPPT photovoltaic charging only working mode, the main power supply circuit and auxiliary power pre-charging circuit of the PCS energy storage converter module are completely cut off, realizing the physical power-off sleep of the PCS and significantly reducing the overall standby loss of the system. The PCS activation detection module continuously monitors the activation conditions. The activation judgment logic unit embedded in the main control chip of the MPPT charging controller module automatically judges and outputs the activation control command. According to the preset timing sequence, the auxiliary power supply relay is first controlled to close for soft start pre-charging. After the auxiliary power supply voltage stabilizes, the main relay is controlled to close, realizing the automatic instant activation and soft start protection of the PCS without manual intervention, taking into account both the activation response speed and the surge current suppression of the DC bus capacitor. Through the coordinated cooperation of the sleep judgment logic unit and the activation judgment logic unit embedded in the main control chip, and the recording of the sleep status flag bit by the non-volatile storage unit, a complete sleep-activation closed-loop control is formed to ensure the reliability and traceability of state switching.

[0015] The invention will become clearer from the following description, taken in conjunction with the accompanying drawings, which are used to explain embodiments of the invention. Attached Figure Description

[0016] Figure 1 The diagram shown is a flowchart of the MPPT reverse control integrated machine PCS intelligent sleep method according to an embodiment of the present invention.

[0017] Figure 2 The diagram shown is a flowchart of the MPPT reverse control integrated machine PCS intelligent sleep method according to another embodiment of the present invention.

[0018] Figure 3 The diagram shows a flowchart of the MPPT reverse control integrated machine PCS intelligent sleep method according to yet another embodiment of the present invention.

[0019] Figure 4 The diagram shown is the overall structural block diagram of the MPPT inverter control integrated machine PCS intelligent sleep system.

[0020] Figure 5 The diagram shown is a structural block diagram of the intelligent relay control unit.

[0021] Figure 6 The diagram shown is a block diagram of the shared current limiting module. Detailed Implementation

[0022] This section will describe in detail specific embodiments of the present invention. Preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but they should not be construed as limiting the scope of protection of the present invention.

[0023] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0024] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0025] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0026] refer to Figure 1 This embodiment discloses a method for intelligent sleep mode of an MPPT inverter control integrated machine PCS, including the following steps: S1. System Initialization Steps: After power-on, both the MPPT charging controller module and the PCS energy storage converter module enter normal operating status. The main relay and auxiliary power supply relay are closed by default, and the PCS energy storage converter module is powered on. In this embodiment, during system power-on initialization, the main control chip of the MPPT charging controller module first performs a self-test to confirm that the status of each functional module is normal. The closing of the main relay connects the main power supply circuit of the PCS energy storage converter module, providing main power to core components such as the power conversion unit, control circuit, and drive circuit. The closing of the auxiliary power supply relay connects the auxiliary power pre-charging circuit, providing power to the auxiliary power supply and control circuit of the PCS energy storage converter module. At this time, the PCS energy storage converter module completes the power-on self-test, establishes an initial communication connection with the MPPT charging controller module, and the system enters the normal MPPT photovoltaic charging and PCS inverter / grid-connected collaborative working state.

[0027] S2. Operation Status Monitoring Steps: The MPPT charging controller module collects system operation status parameters in real time. In this embodiment, the MPPT charging controller module collects the following system operation status parameters in real time: photovoltaic input power, calculated by sampling the voltage and current of the photovoltaic input interface; state of charge (SOC) of the energy storage battery, obtained through communication with the battery management system (BMS); AC side load power, obtained through output power detection of the PCS energy storage converter module or AC side current sampling; communication status, including the communication link status with the PCS energy storage converter module, battery management system, remote monitoring platform, and other devices. The above parameters are collected cyclically at a preset sampling period (e.g., 100ms) and stored in the temporary data buffer of the main control chip for subsequent sleep condition judgment.

[0028] S3. Sleep Condition Judgment Step: The sleep judgment logic unit embedded in the main control chip of the MPPT charging controller module determines whether the preset sleep condition is met. The preset sleep condition is that the system is in MPPT-only photovoltaic charging mode and the PCS energy storage converter module does not need to participate in the operation. In this embodiment, the sleep judgment logic unit performs a comprehensive analysis of the operating status parameters collected in S2 at a preset judgment period (e.g., 1 second). The preset sleep condition is that the system is in MPPT-only photovoltaic charging mode and the PCS energy storage converter module does not need to participate in the operation, that is, the system currently only needs to perform photovoltaic DC charging and does not need to perform DC-AC conversion, grid-connected inverter, off-grid inverter, or active charge and discharge management of the energy storage battery. When the sleep judgment logic unit determines that the above preset sleep condition is met, it outputs a sleep trigger signal; if it is not met, the system continues to operate normally and returns to S2 for continuous monitoring.

[0029] S4. Execute the PCS energy storage converter module power-off hibernation procedure: When the hibernation conditions are met, a PCS energy storage converter module shutdown command is sent, and the system waits for the PCS energy storage converter module to complete its current task. The main relay and auxiliary power supply relay are sequentially disconnected via the relay drive module to cut off the main power supply circuit and auxiliary power pre-charge circuit of the PCS energy storage converter module, causing the PCS energy storage converter module to enter a physical hibernation state. Simultaneously, the hibernation state flag is recorded in the non-volatile memory unit. In this embodiment, after the hibernation judgment logic unit determines that the preset hibernation conditions are met, it first sends a shutdown command to the PCS energy storage converter module through the communication interface. After receiving the shutdown command, the PCS energy storage converter module performs the final operations of the current task, including: completing the ongoing inverter or rectification cycle, discharging the DC bus capacitor voltage to a safe range, saving the current operating parameters, and feeding back a shutdown ready signal. After the main control chip confirms that the PCS energy storage converter module has completed its current task, it sequentially controls the main relay and auxiliary power supply relay to disconnect via the relay drive module. The specific timing sequence is as follows: First, the main relay is disconnected, cutting off the main power supply circuit of the PCS energy storage converter module, thus de-energizing high-power components such as the power conversion unit and drive circuit. After a preset delay (e.g., 100ms), the auxiliary power supply relay is then disconnected, cutting off the auxiliary power pre-charge circuit, completely de-energizing the control circuit and auxiliary power supply of the PCS energy storage converter module. At this time, the PCS energy storage converter module enters a physically de-energized sleep state, reducing static power consumption. Simultaneously, the main control chip writes the sleep state flag to a non-volatile memory unit, recording the current sleep state and sleep timestamp for subsequent activation.

[0030] S5. Activation Condition Monitoring Steps: During the PCS energy storage converter module's sleep period, the low-power detection circuit remains operational, continuously monitoring the PCS energy storage converter module's activation conditions. In this embodiment, during the PCS energy storage converter module's sleep period, the main control chip of the MPPT charging controller module and the PCS activation detection module maintain a low-power operating state, powered by the MPPT charging controller module's auxiliary power supply or an independent low-power detection circuit. The PCS activation detection module continuously monitors the PCS energy storage converter module's activation conditions, including: monitoring changes in photovoltaic input power through voltage and current sampling of the photovoltaic input interface; monitoring AC load access through the AC side voltage detection circuit; monitoring grid connection scheduling commands, battery management system requests, and user remote wake-up commands through the communication interface; monitoring timed wake-up signals through a timer; and monitoring system fault protection requirements through a system fault detection circuit. When the PCS activation detection module detects that any activation condition is met, it immediately sends an activation detection signal to the main control chip.

[0031] S6. Execute the automatic activation steps of the PCS energy storage converter module: When the activation conditions are met, the activation judgment logic unit embedded in the main control chip outputs an activation control command. First, it controls the auxiliary power supply relay to close, performing a soft-start pre-charge on the PCS energy storage converter module through the auxiliary power pre-charge circuit. After a delay until the auxiliary power supply voltage stabilizes, it controls the main relay to close, connecting the main power supply circuit of the PCS energy storage converter module. The PCS energy storage converter module then powers on, initializes, and establishes a communication handshake with the MPPT charging controller module, entering normal operating status. In this embodiment, after the main control chip receives the activation detection signal sent by the PCS activation detection module, the activation judgment logic unit confirms and judges the activation conditions. After confirming that the preset activation conditions are met, the activation judgment logic unit outputs an activation control command. According to the activation control command, the main control chip first controls the auxiliary power supply relay to close through the relay drive module. The closing of the auxiliary power supply relay connects the auxiliary power pre-charge circuit, and the pre-charge resistor is connected to the DC bus capacitor charging circuit of the PCS energy storage converter module to limit inrush current and achieve soft-start pre-charge. The main control chip monitors the auxiliary power supply voltage through voltage sampling. When the auxiliary power supply voltage stabilizes at a preset threshold (e.g., 90% of the rated voltage) for a preset duration (e.g., 50ms), the main control chip controls the main relay to close via the relay drive module. The closing of the main relay connects the main power supply circuit of the PCS energy storage converter module, powering on the control circuit, drive circuit, and power conversion unit of the PCS energy storage converter module. After power-on, the PCS energy storage converter module executes an initialization program, performing self-tests, parameter loading, and communication port initialization. It then establishes a communication handshake with the MPPT charging controller module. After confirming synchronization between the two, the PCS energy storage converter module enters normal operation, responding to the coordinated control of the MPPT charging controller module to perform DC-AC conversion, grid-connected / off-grid inverter operation, or energy storage battery charging and discharging management.

[0032] In one embodiment, the system operating status parameters in S2 include photovoltaic input power, energy storage battery state of charge (SOC), AC-side load power, and communication status. In this embodiment, the specific acquisition method for the system operating status parameters is as follows: Photovoltaic input power is sampled in real time by voltage and current sensors at the photovoltaic input interface of the MPPT charging controller module, converted by an ADC, and calculated by the main control chip, with a sampling accuracy of ±1% and an update cycle of 100ms; the energy storage battery's SOC is obtained through CAN communication with the battery management system, with a communication cycle of 500ms and an SOC accuracy of ±2%; the AC-side load power is sampled by the current sensor at the AC output terminal of the PCS energy storage converter module, calculated internally by the PCS energy storage converter module, and reported to the main control chip through the communication interface, with an update cycle of 100ms; the communication status includes the CAN communication link status with the PCS energy storage converter module, the CAN communication link status with the battery management system, and the Ethernet / 4G communication link status with the remote monitoring platform. The main control chip confirms the normality of each communication link through periodic heartbeat detection.

[0033] In one embodiment, the preset sleep conditions in S3 include: photovoltaic input power is lower than a preset sleep power threshold, energy storage battery SOC is lower than the charging cutoff value, there is no AC load or the load power is lower than the threshold, there is no grid connection dispatch command, and there is no PCS energy storage converter module actively working request, and the above conditions are continuously met for more than a preset delay. In this embodiment, the specific judgment logic of the preset sleep conditions is as follows: photovoltaic input power is lower than the preset sleep power threshold (e.g., 500W), indicating that the current light is weak and the photovoltaic energy is limited, so there is no need for the PCS energy storage converter module to perform inverter output; the energy storage battery SOC is lower than the charging cutoff value (e.g., 95%), indicating that the battery is not fully charged and the MPPT charging controller module can independently complete the charging task; there is no AC load or the load power is lower than the threshold (e.g., 50W), indicating that there is no effective power demand on the AC side; there is no grid connection dispatch command, indicating that there is no dispatch demand on the grid side; there is no PCS energy storage converter module actively working request, indicating that the PCS energy storage converter module itself has no necessary tasks to run (e.g., self-test, fault handling, etc.). All five conditions above must be met simultaneously and continuously for a preset delay (e.g., 30 minutes) to be considered as meeting the preset hibernation conditions. The preset delay is used to prevent the system from frequently switching between hibernation and active states due to short-term state fluctuations, thereby improving system stability.

[0034] In one embodiment, the activation conditions in S5 include any of the following: the photovoltaic input power recovers to or exceeds a preset activation power threshold for a preset duration; an AC load is connected and its power is greater than the threshold; a grid connection scheduling command is received; the battery management system requests battery discharge; the energy storage battery SOC reaches the charging cutoff value; system fault protection requirements; a user remote wake-up command; or a timed wake-up signal. In this embodiment, the specific judgment logic for the activation conditions is as follows: When the photovoltaic input power rises to above a preset activation power threshold (e.g., 800W) and remains above it for a preset duration (e.g., 5 minutes), it indicates enhanced sunlight and sufficient photovoltaic energy, which may require the PCS energy storage converter module to provide inverter power supply or grid connection; When an AC load is connected and its power exceeds a threshold (e.g., 100W), it indicates that the user has electricity demand, requiring the PCS energy storage converter module to provide AC output; When a grid connection dispatch command is received, it indicates that the grid side has dispatch requirements, requiring the PCS energy storage converter module to respond; When the battery management system requests battery discharge, it indicates that the energy storage battery needs to release energy; When the energy storage battery SOC reaches the charging cutoff value (e.g., 95%), it indicates that the battery is fully charged, and the PCS energy storage converter module may need to provide grid-connected electricity or load power supply; When a system fault protection requirement is needed, it indicates that a system fault has occurred, requiring the PCS energy storage converter module to participate in protection actions; When a user remote wake-up command is received, it indicates that the user actively requests activation via a local button or remote monitoring platform; When a timed wake-up signal is received, it indicates that a preset timed wake-up time has been reached. Meeting any one of the above activation conditions will trigger the activation process; simultaneous fulfillment is not required.

[0035] In one embodiment, reference Figure 2 After the S2 operation status monitoring step and before the S3 sleep condition judgment step, the following steps are also included: S21, shared current limiting step: The current limiting quota of the multiple photovoltaic input interfaces is changed from independent hard allocation to dynamic allocation of a shared total current pool, and the sum of the output current of each photovoltaic input interface does not exceed the preset total current limiting quota. In this embodiment, the MPPT charging controller module includes two photovoltaic input interfaces 101, which are respectively connected to two photovoltaic arrays. In the traditional independent hard allocation mode, each photovoltaic input interface has an independent current limiting quota (e.g., 50A each). When one photovoltaic array has a large output power and high current demand, even if the other photovoltaic array has a small output power and low current demand, it cannot use the idle quota, resulting in a decrease in the overall charging efficiency. The shared current limiting step of this embodiment merges the current limiting quota of the two photovoltaic input interfaces into a shared total current pool (e.g., a total limit of 100A), and the sum of the output current of each photovoltaic input interface does not exceed the preset total current limiting quota. When the current demand of one channel is low, its idle quota can be dynamically allocated to the other channel to maximize the total output power.

[0036] In one embodiment, reference Figure 3 The S21 shared current limiting step specifically includes: S211. Synchronously sample the output current of each photovoltaic input interface and calculate the total current; the main control chip uses two independent ADC sampling channels to synchronously sample the output current of the two photovoltaic input interfaces along the same clock edge, with a sampling period of 50μs, to ensure the time synchronization of the two currents. After sampling, the main control chip adds the two current values ​​to calculate the total current.

[0037] S212. When the total current does not exceed the total current limit, the independent maximum power point tracking (MPPT) operation of each photovoltaic input interface is not interfered with; when the calculated total current is less than or equal to the preset total current limit (e.g., 100A), the main control chip does not interfere with the independent MPPT tracking operation of the two photovoltaic input interfaces. The DC / DC converter of each photovoltaic input interface independently performs maximum power point tracking according to the IV characteristic curve of its respective photovoltaic array, without interference.

[0038] S213. When the total current exceeds the total current limit, an arbitration derating algorithm is activated to drate the current of each channel according to a preset mode. The preset modes include proportional derating mode, priority derating mode, or efficiency-priority derating mode. When the total current exceeds the preset total current limit, the main control chip activates the arbitration derating algorithm. The preset modes include: proportional derating mode, which evenly distributes the total over-limit current according to the ratio of the current of the two channels; priority derating mode, which prioritizes the current of the channel with the higher preset priority and allocates the remaining current to the channel with the lower priority; and efficiency-priority derating mode, which prioritizes the current of the high-efficiency channel and reduces the current of the low-efficiency channel based on the real-time conversion efficiency of the two DC / DC converters, thereby maximizing the total output power. Users can preset one of the above modes through the configuration interface of the MPPT charging controller module.

[0039] In one embodiment, the step of S6 performing the automatic activation of the PCS energy storage converter module further includes: The activation failure protection mechanism starts timing after the main relay is closed and the auxiliary power supply voltage is detected to be stable. If no handshake signal indicating normal startup of the PCS energy storage converter module is received within a preset maximum time, the activation is deemed to have failed. The main relay and auxiliary power supply relay are automatically disconnected, and activation is retried after a delay, with a maximum of a preset number of attempts. If multiple attempts fail, an audible and visual alarm is triggered, and the fault is reported to the remote monitoring platform. In this embodiment, the activation failure protection mechanism is specifically implemented as follows: The activation failure protection unit embedded in the main control chip starts timing after the main relay is closed and the auxiliary power supply voltage is detected to be stable, and continuously listens for the handshake signal of the PCS energy storage converter module through the communication interface. If no handshake signal indicating normal startup of the PCS energy storage converter module is received within a preset maximum time (e.g., 30 seconds), the activation failure protection unit determines that the activation has failed. At this time, the activation failure protection unit automatically disconnects the main relay and auxiliary power supply relay through the relay drive module, causing the PCS energy storage converter module to be powered off again. After a preset delay (e.g., 5 seconds), the activation failure protection unit re-executes the S6 activation process: first, it closes the auxiliary power supply relay for pre-charging; then, after the auxiliary power supply voltage stabilizes, it closes the main relay and attempts activation again. This retry process can be executed a maximum of a preset number of times (e.g., 3 times). If all 3 attempts fail, the activation failure protection unit triggers a local audible and visual alarm and reports the fault information to the remote monitoring platform via the remote communication module, prompting maintenance personnel to conduct on-site repairs. The fault information includes: the number of activation failures, the timestamp of each attempt, the response status of the PCS energy storage converter module, and the auxiliary power supply voltage waveform, facilitating fault location.

[0040] refer to Figures 4 to 6This embodiment also provides an MPPT inverter integrated machine PCS intelligent sleep system, including: an MPPT charging controller module 100, including at least one photovoltaic input interface 101 for electrical connection with a photovoltaic array 120, and its output terminal for electrical connection with an energy storage battery 130; the main control chip 110 of the MPPT charging controller module 100 has a sleep judgment logic unit 111 and an activation judgment logic unit 112 embedded in it; a PCS energy storage converter module 200 for realizing DC-AC conversion, grid-connected / off-grid inverter and energy storage battery 130 charging and discharging management; and an intelligent relay control unit 300, which is disposed in the MPPT charging controller module. Between 100 and the PCS energy storage converter module 200, the intelligent relay control unit 300 includes: a relay module 310, connected in series in the power supply circuit of the PCS energy storage converter module 200, used to control the on / off state of the power supply circuit of the PCS energy storage converter module 200; the relay module 310 includes a main relay 311 and an auxiliary power supply relay 312; the main relay 311 is used to control the on / off state of the main power supply circuit of the PCS energy storage converter module 200; the auxiliary power supply relay 312 is connected in series with a pre-charge resistor and then in parallel across the two ends of the main relay 311, used to control the on / off state of the auxiliary power pre-charge circuit; relay The device driver module 320, directly controlled by the main control chip 110 of the MPPT charging controller module 100, is used to drive the main relay 311 and the auxiliary power supply relay 312 to switch on and off according to a preset timing sequence; the PCS activation detection module 330 is used to continuously monitor the activation conditions and send activation detection signals to the main control chip 110 during the sleep period of the PCS energy storage converter module 200; the non-volatile storage unit 340 is communicatively connected to the main control chip 110 and is used to record the sleep state flag bit; wherein, the sleep judgment logic unit 111 is configured to control the main relay 311 and the auxiliary power supply relay 312 to switch on and off according to a preset sleep condition. The main relay 311 and the auxiliary power supply relay 312 are disconnected. The preset sleep condition is that the system is in MPPT photovoltaic charging mode only and the PCS energy storage converter module 200 does not need to participate in the operation. The activation judgment logic unit 112 is configured to, when it receives the activation detection signal sent by the PCS activation detection module 330 and determines that the preset activation condition is met, first control the auxiliary power supply relay 312 to close according to the preset timing sequence to perform soft start pre-charging of the PCS energy storage converter module 200 through the auxiliary power pre-charging circuit, and after a delay until the auxiliary power supply voltage stabilizes, control the main relay 311 to close and connect the main power supply circuit.

[0041] In this embodiment, the MPPT charging controller module 100 is the core control unit of the system, responsible for photovoltaic energy acquisition, battery charging management, and overall system coordination and control. At least one photovoltaic input interface 101 is provided, electrically connected to the photovoltaic array 120 via a DC line. After the photovoltaic array 120 converts solar energy into DC power, it is input to the MPPT charging controller module 100 via the photovoltaic input interface 101. The MPPT charging controller module 100 integrates an MPPT tracking circuit, which performs real-time maximum power point tracking based on the IV characteristic curve of the photovoltaic array 120, ensuring efficient photovoltaic energy acquisition. The output of the MPPT charging controller module 100 is electrically connected to the energy storage battery 130 via a DC line, converting the electrical energy corresponding to the tracked maximum power point into a voltage and current suitable for charging the energy storage battery 130, achieving efficient charging management. The main control chip 110 is the core processor of the MPPT charging controller module 100, with built-in multi-channel ADC, PWM output, communication interfaces (RS485 / CAN / Ethernet), and other peripheral resources. The hibernation judgment logic unit 111 and the activation judgment logic unit 112 are functional modules embedded in the main control chip 110, implemented through software algorithms, and are responsible for the logical operations of hibernation condition judgment and activation condition judgment, respectively. In this embodiment, the PCS energy storage converter module 200 is the power conversion unit of the system, responsible for converting the DC power of the energy storage battery 130 into AC power, or vice versa. The PCS energy storage converter module 200 is connected to the energy storage battery 130 through the DC bus to obtain DC power; it is connected to the AC load / grid through the AC line to realize bidirectional energy flow. The PCS energy storage converter module 200 internally includes: a power conversion unit (such as a full-bridge inverter circuit composed of IGBT or SiC MOSFET), a control circuit (such as a DSP or FPGA), a drive circuit (such as an isolation drive chip), an auxiliary power supply (such as a switching power supply module), and DC bus capacitors (such as electrolytic capacitors or film capacitors), and other core components. In normal operating mode, the PCS energy storage converter module 200 can perform the following functions: off-grid inverter mode, converting the DC power from the energy storage battery 130 into AC power to supply AC loads; grid-connected inverter mode, feeding excess photovoltaic power or the power from the energy storage battery 130 into the grid; rectifier charging mode, converting grid AC power into DC power to charge the energy storage battery 130; and grid-connected / off-grid switching mode, automatically switching between grid-connected and off-grid operation according to the grid status. In this embodiment, the relay module 310 is the actuator of the intelligent relay control unit 300, directly controlling the power supply to the PCS energy storage converter module 200. The main relay 311 is the core switching device of the system, and its normally open contacts are connected in series in the main power supply circuit of the PCS energy storage converter module 200. The main power supply circuit provides the main operating power for the core components of the PCS energy storage converter module 200, such as the power conversion unit, control circuit, and drive circuit.The rated current of the main relay 311 must be greater than the maximum operating current of the PCS energy storage converter module 200, and the rated voltage must be greater than the maximum DC bus voltage of the system. The auxiliary power supply relay 312 is connected in series with a pre-charge resistor and then in parallel across the main relay 311, forming an auxiliary power supply pre-charge circuit. The resistance value of the pre-charge resistor is selected based on the capacitance of the internal DC bus capacitor of the PCS energy storage converter module 200 and the pre-charge time constant; a typical value is 10Ω~100Ω, and the power is 5W~50W. When the auxiliary power supply relay 312 is closed and the main relay 311 is open, the voltage of the energy storage battery 130 is limited by the pre-charge resistor to charge the DC bus capacitor of the PCS energy storage converter module 200, limiting the inrush current within the safe operating range. In this embodiment, the relay drive module 320 is the drive execution module of the intelligent relay control unit 300, receiving control signals from the main control chip 110 and converting them into sufficient drive current to drive the relay coil. The relay drive module 320 includes: an optocoupler isolation unit to achieve electrical isolation between the main control chip 110 and the relay coil, preventing electromagnetic interference from the relay coil from affecting the normal operation of the main control chip 110; a power drive unit, using an N-channel MOSFET or bipolar transistor as the switching device, with a drive current capability greater than the rated pull-in current of the relay coil, ensuring reliable relay operation; and a freewheeling protection unit, connected in parallel across the relay coil, using a fast recovery diode or TVS diode to absorb the reverse electromotive force generated when the coil is de-energized, protecting the power drive unit from high-voltage breakdown. The main control chip 110 outputs high and low level control signals through the GPIO port, which, after optocoupler isolation, drive the switching device of the power drive unit, thereby controlling the energization / de-energization of the relay coil and realizing the closing / opening of the relay contacts. In this embodiment, the PCS activation detection module 330 is the detection and sensing module of the intelligent relay control unit 300, maintaining low-power operation during the sleep period of the PCS energy storage converter module 200, and continuously monitoring various activation conditions. The PCS activation detection module 330 is powered by the auxiliary power supply of the MPPT charging controller module 100 or an independent low-power detection circuit, ensuring that the detection function is not interrupted when the PCS energy storage converter module 200 is completely physically powered off. The PCS activation detection module 330 includes: a photovoltaic power detection unit, which calculates the photovoltaic input power by sampling the voltage and current of the photovoltaic input interface 101; an AC load detection unit, which detects the AC load connection status through an AC side voltage detection circuit or a current transformer; a communication monitoring unit, which listens for grid connection scheduling commands, battery management system requests, and user remote wake-up commands through an RS485 / CAN / Ethernet communication interface; a timer unit, which has a built-in low-power RTC timer to monitor timed wake-up signals; and a fault detection unit, which monitors system fault protection requirement signals. When any activation condition is met, the PCS activation detection module 330 sends an activation detection signal to the main control chip 110 through an interrupt signal or a communication frame.In this embodiment, the non-volatile storage unit 340 serves as the system's status recording memory, employing EEPROM or Flash memory with a capacity of 4KB to 64KB and a write / erase cycle of at least 100,000. The non-volatile storage unit 340 communicates with the main control chip 110 via an I2C or SPI interface. The recorded content includes: a sleep state flag (0 indicates normal operation, 1 indicates sleep state), a sleep trigger timestamp, a sleep reason code, an activation state flag, an activation trigger timestamp, an activation reason code, the number of activation failures, and the number of relay actions. This recorded information is used for system status tracing, fault analysis, and operational statistics, and the data is not lost after a system power outage. In this embodiment, the hibernation judgment logic unit 111 includes: a parameter acquisition submodule, which reads the system operating status parameters collected by S2 at a preset period (e.g., 1 second); a condition judgment submodule, which performs logical operations according to preset hibernation conditions to determine whether the current hibernation conditions are met; a timing control submodule, which starts a preset delay timer (e.g., 30 minutes) when the condition judgment submodule outputs that the hibernation conditions are met, and outputs a hibernation trigger signal if the conditions are continuously met; and a relay control submodule, which, after receiving the hibernation trigger signal, outputs a control sequence through the GPIO port of the main control chip 110, and drives the main relay 311 and the auxiliary power supply relay 312 to disconnect sequentially through the relay drive module 320. The specific disconnection timing is as follows: first, the main relay 311 disconnection command is output, and after a delay of 100ms until the contacts of the main relay 311 are completely disconnected, the auxiliary power supply relay 312 disconnection command is output to ensure that the main power supply circuit and the auxiliary power pre-charging circuit of the PCS energy storage converter module 200 are completely disconnected, thereby achieving a complete physical power-off. In this embodiment, the activation judgment logic unit 112 includes: a signal receiving submodule, which receives the activation detection signal sent by the PCS activation detection module 330 via interrupt or polling; a condition confirmation submodule, which confirms and judges the activation detection signal, including threshold comparison (e.g., whether the photovoltaic power reaches the activation threshold), duration judgment (e.g., whether the preset duration is met continuously), and anti-jitter processing (e.g., avoiding false triggering due to short-term fluctuations); and a relay control submodule, which outputs a relay control signal with a preset timing after confirming that the preset activation conditions are met. The specific closing timing is as follows: first, the auxiliary power supply relay 312 closing command is output to connect the auxiliary power supply pre-charging circuit, and the pre-charging resistor is connected to the DC bus capacitor charging circuit to limit the surge current; the auxiliary power supply voltage is monitored by ADC sampling, and when the auxiliary power supply voltage is detected to be stably reached to a preset threshold (e.g., 90% of the rated voltage) and lasts for a preset duration (e.g., 50ms), the main relay 311 closing command is output to connect the main power supply circuit and fully power on the PCS energy storage converter module 200. The aforementioned timing control effectively suppressed the surge current when the PCS energy storage converter module 200 was powered on, protecting the DC bus capacitor and relay contacts.

[0042] In one embodiment, there are two photovoltaic input interfaces 101. The MPPT charging controller module 100 further includes a shared current limiting module 400, which includes a shared total current loop control unit 420 and a dynamic allocation arbitration unit 430. The two photovoltaic input interfaces 101 are electrically connected to two photovoltaic arrays 120 respectively. The shared total current loop control unit 420 uniformly limits and manages the total current of the two inputs. The dynamic allocation arbitration unit 430 determines the total current based on the real-time power ratio or preset priority of the two photovoltaic inputs. The total current limit is dynamically allocated; the shared current limit module 400 also includes: a single-path hard limit protection unit 440, which is respectively set at each photovoltaic input interface 101, for setting the absolute safe current limit of a single path; and a total limit soft sharing unit 450, which is connected to the shared total current loop control unit 420, for setting the total current limit shared by the two paths; wherein, normally the two paths operate independently, when the current of one path does not reach the single-path hard limit and the other path needs to exceed the limit, the idle limit is dynamically allocated to the path that needs it through the dynamic allocation arbitration unit 430.

[0043] In this embodiment, the MPPT charging controller module 100 is configured with two photovoltaic input interfaces 101, labeled as Channel 1 and Channel 2, respectively. Each photovoltaic input interface 101 is connected to an independent photovoltaic array 120. The MPPT tracking circuits of the two photovoltaic input interfaces 101 are independent of each other, and each performs maximum power point tracking according to the IV characteristic curve of the connected photovoltaic array 120, unaffected by the operating state of the other. The shared current limiting module 400 is the current management function module of the MPPT charging controller module 100, including a shared total current loop control unit 420, a dynamic allocation arbitration unit 430, a single-channel hard upper limit protection unit 440, and a total upper limit soft sharing unit 450. The shared total current loop control unit 420 is the core control unit, which uniformly limits and manages the total current input from the two photovoltaic input interfaces 101. The shared total current loop control unit 420 collects the current of Channel 1 and Channel 2 in real time, calculates the total current, and compares the total current with the total upper limit current. If the total current is less than or equal to the total upper limit current, the total current is within the limit, and both photovoltaic inputs operate normally according to their respective MPPT tracking results. If the total current is greater than the total upper limit current, the total current exceeds the limit, and the shared total current loop control unit 420 initiates current limiting control to restrict the total current within the total upper limit current. Current limiting control is achieved by adjusting the duty cycle of the DC / DC converters of the two photovoltaic input interfaces 101. The dynamic allocation arbitration unit 430 dynamically allocates the total current limit based on the real-time power ratio or preset priority of the two photovoltaic input interfaces 101. Users can preset the priority of the two photovoltaic inputs through the configuration interface of the MPPT charging controller module 100. For example: Priority mode 1 prioritizes channel 1 and then channel 2; when the total current exceeds the limit, the current demand of channel 1 is prioritized, and the remaining limit is allocated to channel 2; priority mode 2 prioritizes channel 2 and then channel 1; priority mode 3 is equal for both channels, allocated according to the power ratio. The dynamic allocation arbitration unit 430 receives the current limiting adjustment signal output by the shared total current loop control unit 420, determines the current limiting target value for each of the two channels, and then feeds it back to the DC / DC controller of each channel for execution. A single-channel hard upper limit protection unit 440 is installed at each photovoltaic input interface 101 to set the absolute safe current upper limit for a single channel. The single-channel hard upper limit protection unit 440 is implemented using hardware circuitry, such as a current sampling resistor + comparator circuit. When the current of a single channel exceeds the hard upper limit threshold, hardware protection is directly triggered, forcing the DC / DC converter of that channel to be derated or shut down to ensure absolute safety. The hard upper limit threshold is typically set to 110%~120% of the maximum rated current of the DC / DC converter. The total upper limit soft sharing unit 450 is connected to the shared total current loop control unit 420 and is used to set the shared total current upper limit for both channels. The total upper limit soft sharing unit 450 sends the real-time set total current upper limit to the shared total current loop control unit 420 via a control signal as the target value for the total current limit.The total current limit is typically set based on a combination of factors, including the maximum allowable charging current of the energy storage battery 130, the system's heat dissipation capacity, and the grid connection capacity. Normally, the two circuits operate independently. That is, when the total current does not exceed the total current limit, and the current of each circuit does not exceed the single-circuit current limit set by its respective single-circuit hard limit protection unit 440, the MPPT tracking circuits of the two photovoltaic input interfaces 101 operate independently without interference. When one circuit's current does not reach its single-circuit hard limit and the other circuit requires excess current, the idle current is dynamically allocated to the circuit that needs it through the dynamic allocation arbitration unit 430. For example: Channel 1's current is 30A (hard limit 50A), Channel 2's current is 45A (hard limit 50A), and the total current is 75A (total limit 100A). At this time, Channel 1 has 20A of idle capacity. If Channel 2 needs 55A of current due to enhanced illumination, the dynamic allocation arbitration unit 430 will allocate 10A of idle capacity from Channel 1 to Channel 2, so that Channel 2 can obtain 55A of current, while Channel 1 maintains 30A of current, and the total current is 85A, which does not exceed the total limit of 100A.

[0044] In one embodiment, the main control chip 110 also has an embedded activation failure protection unit 113. The activation failure protection unit 113 starts timing after closing the main relay 311 and detecting that the auxiliary power supply voltage is stable. If a handshake signal for normal start of the PCS energy storage converter module 200 is not received within a preset maximum time, it is determined that the activation has failed. The main relay 311 and the auxiliary power supply relay 312 are automatically disconnected, and the activation is retried after a delay, with a maximum of a preset number of attempts. If multiple attempts fail, an audible and visual alarm is triggered and the fault is reported to the remote monitoring platform.

[0045] In this embodiment, the activation failure protection unit 113 is a functional module embedded in the main control chip 110, responsible for monitoring and protecting the activation process of the PCS energy storage converter module 200. The timing trigger condition for the activation failure protection unit 113 is that the main relay 311 is closed and the auxiliary power supply voltage is stable. The criteria for judging the stability of the auxiliary power supply voltage are: the auxiliary power supply voltage reaches more than 90% of the rated voltage, and the voltage fluctuation rate is less than ±5%, with a duration of more than 50ms. After the above conditions are met, the activation failure protection unit 113 starts the hardware timer or software timer to start timing. The preset maximum time is set according to the normal startup time of the PCS energy storage converter module 200, with a typical value of 10 seconds to 60 seconds. The handshake signal for the normal startup of the PCS energy storage converter module 200 is: after the PCS energy storage converter module 200 is powered on and initialized, it sends a periodic heartbeat frame or status frame to the main control chip 110 through the communication interface. The frame content includes information such as PCS operating status, fault status, and output power. If the handshake signal is not received within the preset maximum time, the activation failure protection unit 113 determines that the activation has failed. Possible reasons for activation failure include: PCS energy storage converter module 200 control circuit failure, communication interface failure, DC bus capacitor short circuit, auxiliary power supply abnormality, software crash, etc. The automatic processing procedure after activation failure is as follows: the activation failure protection unit 113 automatically disconnects the main relay 311 and auxiliary power supply relay 312 through the relay drive module 320, causing the PCS energy storage converter module 200 to be powered off again; after a preset delay (e.g., 5 to 10 seconds), after the internal capacitor of the PCS energy storage converter module 200 is completely discharged and the state is reset, the activation process is re-executed: first, the auxiliary power supply relay 312 is closed for pre-charging, and after the auxiliary power supply voltage stabilizes, the main relay 311 is closed. The above retry process is executed a maximum of a preset number of times, typically 3 to 5 times. If multiple attempts fail, the activation failure protection unit 113 triggers the following protection measures: local audible and visual alarm, using GPIO to drive a buzzer and LED indicator to emit intermittent audible and visual alarm signals to alert on-site personnel; remote fault reporting, sending fault information to the remote monitoring platform via Ethernet or 4G communication module. Fault information includes: device ID, fault type (activation failure), fault timestamp, number of activation attempts, time record of each attempt, auxiliary power supply voltage waveform data, and PCS last response status, facilitating fault diagnosis and dispatching for remote maintenance personnel. Simultaneously, the activation failure protection unit 113 records the fault status in the non-volatile storage unit 340, marking it as "activation failure fault," and locks the automatic retry function to prevent infinite retries from causing relay contact burnout or further system damage. After locking, users can only manually reset locally or remotely via command. Activation can only be attempted again after the fault lock is released.

[0046] The above-disclosed embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. Therefore, any equivalent variations made in accordance with the claims of the present invention are still within the scope of the present invention.

Claims

1. A method for intelligent sleep mode of an MPPT reverse control integrated machine PCS, characterized in that, Includes the following steps: S1. System initialization steps: After power-on, both the MPPT charging controller module and the PCS energy storage converter module enter normal working state. The main relay and auxiliary power supply relay are closed by default, and the PCS energy storage converter module is powered on. S2. Operational Status Monitoring Steps: The MPPT charging controller module collects system operational status parameters in real time; S3. Sleep condition judgment step: The sleep judgment logic unit embedded in the main control chip of the MPPT charging controller module judges whether the preset sleep condition is met. The preset sleep condition is that the system is in the MPPT photovoltaic charging working mode only and the PCS energy storage converter module does not need to participate in the work. S4. Execute the PCS energy storage converter module power-off hibernation procedure: When the hibernation condition is met, send a PCS energy storage converter module shutdown command and wait for the PCS energy storage converter module to complete the current task. Control the main relay and auxiliary power supply relay to disconnect in sequence through the relay drive module to cut off the main power supply circuit and auxiliary power pre-charge circuit of the PCS energy storage converter module, so that the PCS energy storage converter module is powered off and enters physical hibernation state. At the same time, record the hibernation state flag bit to the non-volatile storage unit. S5. Activation condition monitoring steps: During the sleep period of the PCS energy storage converter module, keep the low-power detection circuit running and continuously monitor the activation conditions of the PCS energy storage converter module. S6. Execute the automatic activation steps of the PCS energy storage converter module: When the activation conditions are met, the activation judgment logic unit embedded in the main control chip outputs the activation control command. First, it controls the auxiliary power supply relay to close so that the PCS energy storage converter module can be soft-started and pre-charged through the auxiliary power supply pre-charging circuit. After a delay until the auxiliary power supply voltage stabilizes, it controls the main relay to close so that the main power supply circuit of the PCS energy storage converter module is connected. The PCS energy storage converter module is powered on and initialized and establishes a communication handshake with the MPPT charging controller module, and enters the normal working state.

2. The method as described in claim 1, characterized in that, The system operating status parameters in S2 include photovoltaic input power, energy storage battery state of charge (SOC), AC side load power, and communication status.

3. The method as described in claim 1, characterized in that, The preset sleep conditions in S3 include: photovoltaic input power is lower than the preset sleep power threshold, energy storage battery SOC is less than the charging cutoff value, there is no AC load or the load power is less than the threshold, there is no grid connection dispatch command, and there is no PCS energy storage converter module active working request, and the above conditions are continuously met for more than the preset delay.

4. The method as described in claim 1, characterized in that, The activation condition in S5 includes any one of the following: the photovoltaic input power rises to above the preset activation power threshold and continues for a preset duration; AC load is connected and its power exceeds the threshold; grid connection dispatch command is received; battery management system requests battery discharge; energy storage battery SOC reaches the charging cutoff value; system fault protection requirement; user remote wake-up command; timed wake-up signal.

5. The method as described in claim 1, characterized in that, After the S2 operation status monitoring step and before the S3 sleep condition judgment step, the following steps are also included: S21. Shared Current Limiting Step: Change the current limit of multiple photovoltaic input interfaces from independent hard allocation to dynamic allocation of shared total current pool, and ensure that the sum of the output current of each photovoltaic input interface does not exceed the preset total current limit.

6. The method as described in claim 5, characterized in that, The S21 shared current limiting step specifically includes: S211. Simultaneously sample the output current of each photovoltaic input interface and calculate the total current; S212. When the total current does not exceed the total current limit, the independent maximum power point tracking operation of each photovoltaic input interface is not interfered with. S213. When the total current exceeds the total current limit, the arbitration derating algorithm is activated to drate the current of each channel according to a preset mode, which includes an equal derating mode, a priority derating mode, or an efficiency priority derating mode.

7. The method as described in claim 1, characterized in that, The S6 step of automatically activating the PCS energy storage converter module also includes: The timing begins after the main relay is closed and the auxiliary power supply voltage is detected to be stable. If a handshake signal indicating normal startup of the PCS energy storage converter module is not received within the preset maximum time, the activation is deemed to have failed. The main relay and auxiliary power supply relay are automatically disconnected, and the activation is retried after a delay, with a maximum of the preset number of attempts. If multiple attempts fail, an audible and visual alarm is triggered, and the fault is reported to the remote monitoring platform.

8. A PCS intelligent sleep system for an MPPT reverse control integrated machine, characterized in that, include: The MPPT charging controller module includes at least one photovoltaic input interface for electrical connection to a photovoltaic array, and its output is electrically connected to an energy storage battery. The main control chip of the MPPT charging controller module has a sleep judgment logic unit and an activation judgment logic unit embedded in it. PCS energy storage converter module is used to realize DC-AC conversion, grid-connected / off-grid inverter and energy storage battery charge and discharge management; An intelligent relay control unit is disposed between the MPPT charging controller module and the PCS energy storage converter module. The intelligent relay control unit includes: A relay module is connected in series in the power supply circuit of the PCS energy storage converter module to control the on / off state of the power supply circuit of the PCS energy storage converter module. The relay module includes a main relay and an auxiliary power supply relay. The main relay is used to control the on / off state of the main power supply circuit of the PCS energy storage converter module. The auxiliary power supply relay is connected in series with the pre-charging resistor and then in parallel across the two ends of the main relay to control the on / off state of the auxiliary power pre-charging circuit. The relay drive module is directly controlled by the main control chip of the MPPT charging controller module, and is used to drive the main relay and the auxiliary power supply relay to switch on and off according to a preset timing sequence. The PCS activation detection module is used to continuously monitor the activation conditions and send an activation detection signal to the main control chip during the dormancy period of the PCS energy storage converter module. A non-volatile memory unit, which is communicatively connected to the main control chip, is used to record a sleep state flag bit; The hibernation judgment logic unit is configured to control the main relay and the auxiliary power supply relay to disconnect when a preset hibernation condition is met. The preset hibernation condition is that the system is in MPPT photovoltaic charging mode only and the PCS energy storage converter module does not need to participate in the operation. The activation judgment logic unit is configured to, when receiving the activation detection signal sent by the PCS activation detection module and determining that the preset activation conditions are met, first control the auxiliary power supply relay to close according to the preset timing sequence to perform soft-start pre-charging of the PCS energy storage converter module through the auxiliary power supply pre-charging circuit, and then control the main relay to close to connect the main power supply circuit after a delay until the auxiliary power supply voltage stabilizes.

9. The system as described in claim 8, characterized in that, The photovoltaic input interface has two ports. The MPPT charging controller module also includes a shared current limiting module. The shared current limiting module includes a shared total current loop control unit and a dynamic allocation arbitration unit. The two photovoltaic input interfaces are electrically connected to two photovoltaic arrays respectively. The shared total current loop control unit performs unified limiting management of the total current of the two inputs. The dynamic allocation arbitration unit dynamically allocates the total current limit based on the real-time power ratio of the two photovoltaic inputs or a preset priority. The shared current limiting module also includes: A single-channel hard upper limit protection unit is set at each photovoltaic input interface to set the absolute safe current limit for a single channel; The total upper limit soft sharing unit is connected to the shared total current loop control unit and is used to set the total current upper limit shared by the two channels; Normally, the two circuits operate independently. When the current of one circuit does not reach the single-circuit hard limit and the other circuit needs to exceed the limit, the idle quota is dynamically allocated to the required circuit through the dynamic allocation arbitration unit.

10. The system as described in claim 8, characterized in that, The main control chip also has an embedded activation failure protection unit. The activation failure protection unit starts timing after the main relay is closed and the auxiliary power supply voltage is detected to be stable. If the handshake signal for normal start of the PCS energy storage converter module is not received within the preset maximum time, it is judged as activation failure. The main relay and auxiliary power supply relay are automatically disconnected, and the activation is retried after a delay, with a maximum of preset number of attempts. If multiple attempts fail, an audible and visual alarm is triggered and the fault is reported to the remote monitoring platform.

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