Charging capacity improving system suitable for power capacity increasing difficulty scene

Abstract

The invention relates to the technical field of electric power dispatching, in particular to a charging capacity improving system suitable for an electric power capacity increasing difficulty scene, which comprises a power grid access and perception layer, a core control and logic switching layer, an energy storage and capacity conversion layer and a charging interface and protection layer which are connected in sequence. A power transmission line of an old community is seriously aged, a high-voltage incoming line circuit breaker in an external power grid module has a quick cut-off function and can quickly respond when faults such as short circuit and overload occur in the old line, serious accidents such as fire disasters caused by line problems are prevented, and a distributed power supply fusion scheme is adopted, so that power capacity expansion of the old community is difficult, and the cost is low. Distributed power supplies such as photovoltaic power generation panels are introduced into the distributed power grid incoming line module, idle space of a public area of a community can be utilized for power generation, power utilization requirements of part of residents are met on the spot, and dependence on power supply of a traditional power grid is reduced.

Description

Technical Field

[0001] This invention relates to the field of power dispatching technology, and in particular to a charging capacity enhancement system suitable for scenarios where power capacity expansion is difficult. Background Technology

[0002] In urban power supply systems, the power grids of older residential areas generally suffer from problems such as long construction dates and aging facilities, including damaged insulation layers on lines and degraded performance of switching equipment. These issues can easily lead to short circuits, power outages, and other faults, threatening residents' electricity safety. At the same time, traditional power grids lack the ability to effectively integrate distributed energy sources (such as photovoltaic power generation), making it difficult to adapt to the current trend of energy diversification. This results in low utilization rates of clean energy and an inability to alleviate the pressure on the main grid supply during peak electricity consumption periods in older residential areas.

[0003] Furthermore, older residential communities lack adequate monitoring methods, relying solely on manual inspections, which makes it difficult to promptly detect issues such as power grid frequency fluctuations, harmonic pollution, and abnormal loads, resulting in poor power quality and rapid equipment wear and tear. Moreover, the lack of intelligent interaction and remote management leads to delayed electricity data statistics and slow maintenance response, increasing management costs for power companies and failing to meet residents' demands for efficient and reliable electricity. Therefore, it is necessary to upgrade the technology to build a more suitable power grid access and sensing system for older residential communities. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of the prior art by proposing a charging capacity enhancement system suitable for scenarios where power capacity expansion is difficult.

[0005] To achieve the above objectives, the technical solution adopted by this invention is: a charging capacity enhancement system suitable for scenarios where power capacity expansion is difficult, comprising, in sequence, a grid access and sensing layer, a core control and logic switching layer, an energy storage and capacity conversion layer, and a charging interface and protection layer, wherein:

[0006] The power grid access and sensing layer includes an external power grid module, a distributed power grid incoming module, and a power grid status monitoring module. The distributed power grid incoming module includes a photovoltaic power generation panel, which is installed on the roof of the community's public buildings and in idle spaces.

[0007] The energy storage and capacity conversion layer includes a bidirectional AC-DC conversion module, which performs bidirectional conversion between AC and DC power.

[0008] The charging interface and protection layer include a power distribution module, a charging pile adapter module, and an in-home protection module. The in-home protection module monitors the impact of charging on the indoor voltage in real time. When an abnormality is detected, the charging pile adapter module automatically reduces the power.

[0009] Preferably, the external power grid module includes a high-voltage incoming circuit breaker: used to connect or disconnect the high-voltage power supply and quickly cut off the power supply in the event of a circuit fault;

[0010] Voltage transformer: converts high voltage to low voltage proportionally;

[0011] Smart meters: measure users' electricity consumption in real time and manage electricity consumption intelligently;

[0012] Electromagnetic compatibility filters: suppress electromagnetic interference between the power grid and equipment, and prevent interference signals generated by equipment from polluting the power grid.

[0013] Preferably, the power grid status monitoring module includes a frequency monitoring module: which monitors the operating frequency of the power grid in real time and provides data for power grid frequency regulation control;

[0014] Filtering analysis module: Detects and analyzes harmonic and noise interference signals in the power grid to assess power quality;

[0015] Load forecasting module: Based on historical electricity consumption data and real-time information, it forecasts the electricity load demand for a period of time in the future, assisting in grid dispatching and resource optimization.

[0016] Preferably, the core control and logic switching layer includes a voltage band control module: monitoring the grid voltage and controlling it within a set safe range, and maintaining voltage stability by adjusting relevant equipment;

[0017] System monitoring module: Real-time monitoring of the operating status of the entire power grid system, collection and analysis of data from various modules, and timely warning of abnormal situations;

[0018] Switching module: Based on control commands or system status, it enables switching between different circuits and devices to ensure flexible system operation.

[0019] Preferably, the voltage band control module includes a threshold setting module: pre-setting upper and lower safety thresholds of the grid voltage as a benchmark for judging whether the voltage is normal;

[0020] Voltage comparison module: compares the real-time monitored grid voltage with the set threshold to determine whether the voltage exceeds the safe range;

[0021] Trigger control module: When the voltage exceeds the threshold, the switch switching module is triggered to bring the voltage back to the normal range;

[0022] Delay protection module: Introduces a certain delay when the voltage is abnormal to avoid accidental triggering of regulation due to instantaneous fluctuations, and activates protection measures when the abnormality is continuous.

[0023] Preferably, the system monitoring module includes an interaction module: enabling information interaction between the operator and the system, supporting parameter setting, command input, and operation status display;

[0024] Storage module: Stores historical data of power grid operation, fault records, and configuration parameter information;

[0025] Remote communication module: Transmits real-time data and receives remote control commands through network communication to achieve remote management.

[0026] Preferably, the switch switching module includes a power grid switch module: responsible for connecting or disconnecting the power grid circuit;

[0027] Switching drive module: Receives control signals and converts them into driving power to drive the grid switch module to complete the switching action;

[0028] Switching time control module: precisely controls the switching action time of the power grid switch module;

[0029] Switch feedback module: Real-time detection of the actual status of the power grid switch module and feedback of the status information to the control system.

[0030] Preferably, the bidirectional AC-DC conversion module includes a modular energy storage PACK module: comprising several standardized battery cells for centralized energy storage;

[0031] Battery management module: Real-time monitoring of battery voltage, current, and temperature status; performing charge / discharge protection, power estimation, and cell balancing.

[0032] Energy storage bus: It gathers and aggregates the electrical energy from several energy storage packs;

[0033] Energy storage circuit breaker: When a short circuit or overcurrent fault occurs in the energy storage system, it quickly disconnects the circuit to prevent the fault from escalating.

[0034] Preferably, the inlet protection module provides overvoltage protection, overcurrent protection, overtemperature protection, and short-circuit protection for the indoor power supply line. The inlet protection module includes an emergency shutdown module, which is used to quickly cut off the inlet circuit in the event of a serious fault.

[0035] Compared with the prior art, the present invention has the following beneficial effects:

[0036] 1. This invention flexibly addresses the issue of aging power lines. The power transmission lines in old residential areas are severely aged. The high-voltage incoming circuit breaker in the external power grid module has a rapid disconnection function, which can quickly respond when faults such as short circuits and overloads occur in old lines, preventing serious accidents such as fires caused by line problems.

[0037] 2. This invention adopts a distributed power source integration scheme. It is difficult to expand the power capacity of old residential areas. The distributed grid incoming module introduces distributed power sources such as photovoltaic power generation panels, which can utilize the idle space in the community's public areas (such as rooftops) to generate electricity, meet the electricity needs of some residents on-site, and reduce the dependence on traditional power grid supply.

[0038] 3. This invention can accurately detect power grid anomalies. The power grid structure of old residential areas is complex and the equipment is aging. The power grid status monitoring module can more accurately detect problems. The frequency monitoring module monitors the power grid frequency in real time. The electrical equipment in old residential areas is diverse and can easily cause frequency fluctuations. This module can provide timely warnings. The harmonic analysis module is designed for old residential areas where a large number of inferior electrical appliances generate harmonics. It can accurately analyze the source and content of harmonics, provide a basis for governance, and effectively improve power quality.

[0039] 4. Compared with the large-scale replacement of lines and equipment in the traditional renovation of old residential power grids, this invention reduces the need for large-scale line renovation by using distributed power supply access and precise monitoring. At the same time, it uses smart meters and other devices to achieve remote management, thereby reducing operation and maintenance costs. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of a charging capacity enhancement system applicable to scenarios where power capacity expansion is difficult.

[0041] Figure 2 This is a schematic diagram of the grid access and sensing layer of a charging capacity enhancement system applicable to scenarios where power capacity expansion is difficult, according to the present invention.

[0042] Figure 3 This is a schematic diagram of the core control and logic switching layer of a charging capacity enhancement system applicable to scenarios where power capacity expansion is difficult.

[0043] Figure 4 This is a schematic diagram of a charging interface and protective layer for a charging capacity enhancement system applicable to scenarios where power capacity expansion is difficult. Detailed Implementation

[0044] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0045] like Figures 1-4 The system shown is a charging capacity enhancement system suitable for scenarios where power capacity expansion is difficult. It includes, in sequence, a grid access and sensing layer, a core control and logic switching layer, an energy storage and capacity conversion layer, and a charging interface and protection layer, wherein:

[0046] The grid access and sensing layer includes an external grid module, a distributed grid incoming line module, and a grid status monitoring module. The distributed grid incoming line module includes photovoltaic panels, which are installed on the roofs of public buildings in the community and on idle sites.

[0047] The energy storage and capacity conversion layer includes a bidirectional AC-DC converter module, which performs bidirectional conversion between AC and DC power.

[0048] The charging interface and protection layer include a power distribution module, a charging pile adapter module, and an in-home protection module. The in-home protection module monitors the impact of charging on the indoor voltage in real time. When an abnormality is detected, the charging pile adapter module automatically reduces the power.

[0049] The external power grid module includes a high-voltage incoming circuit breaker: used to connect or disconnect the high-voltage power supply and quickly cut off the power supply in the event of a circuit fault;

[0050] Voltage transformer: converts high voltage to low voltage proportionally;

[0051] Smart meters: measure users' electricity consumption in real time and manage electricity consumption intelligently;

[0052] Electromagnetic compatibility filters: suppress electromagnetic interference between the power grid and equipment, and prevent interference signals generated by equipment from polluting the power grid.

[0053] As a crucial link connecting the power system to the external power grid, the external power grid module has clearly defined functions for its internal components, which work collaboratively. Among them, the high-voltage incoming circuit breaker is responsible for controlling the switching on and off of high-voltage power; it can quickly cut off the power supply in case of a circuit fault, thus providing protection. The voltage transformer proportionally converts high-voltage electricity to low voltage, providing suitable voltage signals for subsequent measurement and protection devices. The smart meter not only measures users' electricity consumption in real time but also enables intelligent electricity management functions such as tiered pricing and prepaid billing. The electromagnetic compatibility filter focuses on suppressing electromagnetic interference between the power grid and equipment, preventing interference signals generated by equipment from polluting the power grid and ensuring the stable operation of the entire power system.

[0054] The power grid status monitoring module includes a frequency monitoring module: which monitors the operating frequency of the power grid in real time and provides data for power grid frequency regulation control;

[0055] Filtering analysis module: Detects and analyzes harmonic and noise interference signals in the power grid to assess power quality;

[0056] Load forecasting module: Based on historical electricity consumption data and real-time information, it forecasts the electricity load demand for a period of time in the future, assisting in grid dispatching and resource optimization.

[0057] During use, the frequency monitoring module continuously tracks the frequency of the power grid operation, providing accurate data support for power grid frequency regulation control; the filter analysis module focuses on detecting and analyzing interference signals such as harmonics and noise in the power grid, thereby making a comprehensive assessment of power quality; and the load forecasting module uses historical electricity consumption data and real-time information to predict the power load demand for a period of time in the future, providing strong assistance for power grid dispatch and optimal allocation of resources.

[0058] The core control and logic switching layer includes a voltage band control module: it monitors the grid voltage and controls it within a set safe range, and maintains voltage stability by adjusting relevant equipment;

[0059] System monitoring module: Real-time monitoring of the operating status of the entire power grid system, collection and analysis of data from various modules, and timely warning of abnormal situations;

[0060] Switching module: Based on control commands or system status, it enables switching between different circuits and devices to ensure flexible system operation.

[0061] The voltage control module constantly monitors the grid voltage and stabilizes it within a set safe range by adjusting relevant equipment; the system monitoring module monitors the operating status of the entire grid in real time, summarizes and analyzes data from each module, and issues timely warnings once an anomaly is detected; the switching module completes the switching operations between different circuits and equipment according to control commands or the actual system status, ensuring that the system can operate flexibly and efficiently.

[0062] The voltage band control module includes a threshold setting module: it presets the upper and lower safety thresholds of the grid voltage as a reference for judging whether the voltage is normal;

[0063] Voltage comparison module: compares the real-time monitored grid voltage with the set threshold to determine whether the voltage exceeds the safe range;

[0064] Trigger control module: When the voltage exceeds the threshold, the switch switching module is triggered to bring the voltage back to the normal range;

[0065] Delay protection module: Introduces a certain delay when the voltage is abnormal to avoid accidental triggering of regulation due to instantaneous fluctuations, and activates protection measures when the abnormality is continuous.

[0066] The above implementation plan can be illustrated by the following model:

[0067] 1. Initialization: Enter the upper and lower limits of the voltage safety range (U_max, U_min) and the delay protection time T through the threshold setting module;

[0068] 2. Real-time acquisition of the current power grid voltage U_current;

[0069] 3. Voltage comparison module operation:

[0070] If U_min ≤ U_current ≤ U_max: Determine it as the normal state, no action

[0071] If U_current < U_min or U_current > U_max: Determine it as the abnormal state, enter the delay judgment;

[0072] 4. The delay protection module starts timing:

[0073] If the duration of the abnormal state < T: Determine it as an instantaneous fluctuation, do not trigger adjustment

[0074] If the duration of the abnormal state ≥ T: Determine it as a continuous abnormality, activate the trigger control module;

[0075] 5. The trigger control module executes: Send an adjustment instruction to the switch switching module until U_current returns to the interval [U_min, U_max];

[0076] 6. Loop through steps 2 - 5, continuously monitor and adjust.

[0077] This model realizes the stable control of voltage through the logical process of "threshold judgment - delay filtering - trigger adjustment", which not only avoids misoperations caused by instantaneous fluctuations but also can respond in a timely manner during real abnormalities.

[0078] The system monitoring module includes an interaction module: realizing the information interaction between the operator and the system, supporting parameter setting, instruction input, and operation status display;

[0079] A storage module: storing historical data of power grid operation, fault records, and configuration parameter information;

[0080] A remote communication module: transmitting real - time data and receiving remote control instructions through network communication to achieve remote management.

[0081] The interaction module builds a communication bridge between the operator and the system, supporting parameter setting, instruction entry, and intuitive display of the operation status; the storage module is responsible for retaining key information such as historical data of power grid operation, fault details, and configuration parameters, providing a basis for subsequent traceability and analysis; the remote communication module relies on the network to achieve data transmission and instruction reception, enabling smooth remote management and ensuring that the system can be effectively controlled in different scenarios.

[0082] The switch switching module includes a power grid switch module: responsible for connecting or disconnecting the power grid circuit;

[0083] A switching drive module: receiving a control signal and converting it into driving power to drive the power grid switch module to complete the switching action;

[0084] Switching time control module: precisely controls the switching action time of the power grid switch module;

[0085] Switch feedback module: Real-time detection of the actual status of the power grid switch module and feedback of the status information to the control system.

[0086] The bidirectional AC-DC conversion module includes a modular energy storage PACK module, which consists of several standardized battery cells for centralized energy storage.

[0087] Battery management module: Real-time monitoring of battery voltage, current, and temperature status; performing charge / discharge protection, power estimation, and cell balancing.

[0088] Energy storage bus: It gathers and aggregates the electrical energy from several energy storage packs;

[0089] Energy storage circuit breaker: When a short circuit or overcurrent fault occurs in the energy storage system, it quickly disconnects the circuit to prevent the fault from escalating.

[0090] The battery management module monitors the battery's voltage, current, temperature, and other statuses in real time, while also being responsible for charge and discharge protection, power estimation, and cell balancing to ensure stable battery operation. The energy storage busbar aggregates and integrates the power from multiple energy storage packs, improving power transmission efficiency. The energy storage circuit breaker quickly disconnects the circuit when a short circuit or overcurrent fault occurs in the energy storage system, preventing the fault from spreading and building a solid safety barrier for the entire energy storage process.

[0091] The inlet protection module provides overvoltage protection, overcurrent protection, overtemperature protection, and short-circuit protection for the incoming power line to the house. The inlet protection module also includes an emergency stop module, which is used to quickly cut off the incoming power circuit in the event of a serious fault.

[0092] This solution can flexibly address the aging of power lines. The power transmission lines in old residential areas are severely aged. The high-voltage incoming circuit breaker in the external power grid module has a fast disconnection function, which can react quickly when faults such as short circuits and overloads occur in old lines, preventing serious accidents such as fires caused by line problems.

[0093] The distributed power supply integration solution was adopted. Due to the difficulty of expanding the power capacity of old residential areas, the distributed grid incoming module introduces distributed power sources such as photovoltaic panels, which can generate electricity using idle space in the community's public areas (such as rooftops), meet the electricity needs of some residents locally, and reduce the dependence on traditional power grid supply.

[0094] It can accurately detect power grid anomalies. The power grid structure of old residential areas is complex and the equipment is aging. The power grid status monitoring module can more accurately detect problems. The frequency monitoring module monitors the power grid frequency in real time. The electrical equipment in old residential areas is diverse and can easily cause frequency fluctuations. This module can provide timely warnings. The harmonic analysis module is designed for old residential areas where a large number of inferior electrical appliances generate harmonics. It can accurately analyze the source and content of harmonics, provide a basis for governance, and effectively improve power quality.

[0095] Compared to the large-scale replacement of lines and equipment in the traditional renovation of old residential power grids, this system reduces the need for large-scale line renovations through distributed power source access and precise monitoring. At the same time, it uses smart meters and other devices to achieve remote management, reducing operation and maintenance costs.

[0096] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A charging capacity enhancement system suitable for scenarios where power capacity expansion is difficult, characterized in that: It includes, in sequence, the grid access and sensing layer, the core control and logic switching layer, the energy storage and capacity conversion layer, and the charging interface and protection layer, wherein: The power grid access and sensing layer includes an external power grid module, a distributed power grid incoming module, and a power grid status monitoring module. The distributed power grid incoming module includes a photovoltaic power generation panel, which is installed on the roof of the community's public buildings and in idle spaces. The energy storage and capacity conversion layer includes a bidirectional AC-DC conversion module, which performs bidirectional conversion between AC and DC power. The charging interface and protection layer include a power distribution module, a charging pile adapter module, and an in-home protection module. The in-home protection module monitors the impact of charging on the indoor voltage in real time. When an abnormality is detected, the charging pile adapter module automatically reduces the power.

2. The charging capacity enhancement system according to claim 1, applicable to scenarios where power capacity expansion is difficult, is characterized in that: The external power grid module includes a high-voltage incoming circuit breaker: used to connect or disconnect the high-voltage power supply and quickly cut off the power supply in the event of a circuit fault; Voltage transformer: converts high voltage to low voltage proportionally; Smart meters: measure users' electricity consumption in real time and manage electricity consumption intelligently; Electromagnetic compatibility filters: suppress electromagnetic interference between the power grid and equipment, and prevent interference signals generated by equipment from polluting the power grid.

3. The charging capacity enhancement system according to claim 1, applicable to scenarios where power capacity expansion is difficult, is characterized in that: The power grid status monitoring module includes a frequency monitoring module: which monitors the operating frequency of the power grid in real time and provides data for power grid frequency regulation control; Filtering analysis module: Detects and analyzes harmonic and noise interference signals in the power grid to assess power quality; Load forecasting module: Based on historical electricity consumption data and real-time information, it forecasts the electricity load demand for a period of time in the future, assisting in grid dispatching and resource optimization.

4. The charging capacity enhancement system according to claim 1, applicable to scenarios where power capacity expansion is difficult, is characterized in that: The core control and logic switching layer includes a voltage band control module: monitoring the grid voltage and controlling it within a set safe range, and maintaining voltage stability by adjusting relevant equipment; System monitoring module: Real-time monitoring of the operating status of the entire power grid system, collection and analysis of data from various modules, and timely warning of abnormal situations; Switching module: Based on control commands or system status, it enables switching between different circuits and devices to ensure flexible system operation.

5. A charging capacity enhancement system suitable for scenarios where power capacity expansion is difficult, as described in claim 4, characterized in that: The voltage band control module includes a threshold setting module: pre-setting upper and lower safety thresholds for the grid voltage as a benchmark for judging whether the voltage is normal; Voltage comparison module: compares the real-time monitored grid voltage with the set threshold to determine whether the voltage exceeds the safe range; Trigger control module: When the voltage exceeds the threshold, the switch switching module is triggered to bring the voltage back to the normal range; Delay protection module: Introduces a certain delay when the voltage is abnormal to avoid accidental triggering of regulation due to instantaneous fluctuations, and activates protection measures when the abnormality is continuous.

6. A charging capacity enhancement system suitable for scenarios where power capacity expansion is difficult, as described in claim 4, characterized in that: The system monitoring module includes an interaction module: enabling information interaction between operators and the system, supporting parameter setting, command input, and operation status display; Storage module: Stores historical data of power grid operation, fault records, and configuration parameter information; Remote communication module: Transmits real-time data and receives remote control commands through network communication to achieve remote management.

7. A charging capacity enhancement system suitable for scenarios where power capacity expansion is difficult, as described in claim 4, characterized in that: The switch switching module includes a power grid switch module: responsible for connecting or disconnecting the power grid circuit; Switching drive module: Receives control signals and converts them into driving power to drive the grid switch module to complete the switching action; Switching time control module: precisely controls the switching action time of the power grid switch module; Switch feedback module: Real-time detection of the actual status of the power grid switch module and feedback of the status information to the control system.

8. A charging capacity enhancement system suitable for scenarios where power capacity expansion is difficult, as described in claim 1, characterized in that: The bidirectional AC-DC conversion module includes a modular energy storage PACK module, which comprises several standardized battery cells for centralized energy storage. Battery management module: Real-time monitoring of battery voltage, current, and temperature status; performing charge / discharge protection, power estimation, and cell balancing. Energy storage bus: It gathers and aggregates the electrical energy from several energy storage packs; Energy storage circuit breaker: When a short circuit or overcurrent fault occurs in the energy storage system, it quickly disconnects the circuit to prevent the fault from escalating.

9. A charging capacity enhancement system suitable for scenarios where power capacity expansion is difficult, as described in claim 1, characterized in that: The incoming power protection module provides overvoltage protection, overcurrent protection, overtemperature protection, and short circuit protection for the incoming power line to the household. The incoming power protection module includes an emergency shutdown module, which is used to quickly cut off the incoming power circuit in the event of a serious fault.

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