Power supply control system and method of ring main unit

Abstract

The invention discloses a power supply control system of a ring main unit. The power supply control system comprises a power supply management module used for managing various power supply inputs; the load monitoring and predicting module is used for monitoring and predicting in real time; the power supply selection and load balancing module is used for determining the most suitable power supply to meet the current load requirement and carrying out load balancing among a plurality of power supplies; the fault detection module is responsible for monitoring the operation states of the power supply and the load system; the data acquisition and transmission module is responsible for acquiring real-time data in the ring main unit; the central control and decision module makes a decision according to the real-time monitoring and prediction result; and the user interface and remote monitoring module ensures that operation and maintenance personnel can know the working state of the ring main unit at any time. According to the invention, power supply use is optimized through an intelligent scheduling strategy, the energy utilization rate is improved, the maintenance and operation cost is reduced, and compared with an existing power supply control system, the system has a higher intelligent level and stronger adaptability.

Description

Technical Field

[0001] The present invention relates to the technical field of power distribution, and in particular to a power supply control system and method for a ring main unit. Background Art

[0002] As an important component of modern power distribution systems, ring main units are widely used in urban power grids, industrial parks, data centers, and other scenarios that require high power supply stability. Ring main units are usually used to distribute, control, and protect electrical energy in power systems. Their core functions include improving power supply reliability, optimizing power dispatching, and reducing the impact of faults.

[0003] The existing power supply control system of the ring main unit usually adopts a fixed power supply configuration, that is, the main power supply and backup power supply are pre-specified in the design stage, and the backup power supply is switched only when the main power supply fails. However, this method has the following technical defects: First, due to the failure of dynamic adjustment of the fixed power supply configuration, some power supplies may be in a low-load state for a long time, while some power supplies may suffer from increased losses due to high-load operation, reducing the overall power supply efficiency; secondly, most existing systems rely on manual or preset logic for power switching, which makes it difficult to select the optimal power supply according to the real-time grid load conditions, resulting in delayed power scheduling and affecting the power supply quality; at the same time, when the load suddenly changes or a power supply fails, the existing system may have a switching delay, or even cause a short-term power outage, affecting the continuous operation of critical loads; finally, the existing system fails to optimize the operating status and load conditions of different power supplies in real time, which may cause some power supplies to operate at high load for a long time, shortening the life of the equipment and increasing maintenance costs. Summary of the invention

[0004] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] In a first aspect, an embodiment of the present invention provides a power supply control system for a ring main unit, comprising:

[0007] Power management module: used to manage multiple power inputs, including main power, backup power, and green energy, and to achieve seamless power switching in the event of power failure or load fluctuation through automatic switching;

[0008] Load monitoring and prediction module: monitors the power demand of each load section in real time and predicts future load;

[0009] Power selection and load balancing module: Based on the data from the power management module and the load monitoring and prediction module, it determines the most suitable power source to meet the current load demand and balances the load among multiple power sources;

[0010] Fault detection module: responsible for monitoring the operating status of the power supply and load system;

[0011] Data acquisition and transmission module: responsible for collecting real-time data in the ring main unit and transmitting the data to the central control system for processing and analysis;

[0012] Central control and decision-making module: Make decisions based on real-time monitoring and prediction results, control the operation of the system, and interact with users;

[0013] User interface and remote monitoring module: Provides real-time monitoring, remote control and maintenance functions for operators, ensuring that operation and maintenance personnel can understand the working status of the ring main unit at any time, adjust the system configuration in time, and ensure stable operation of the system.

[0014] As a preferred solution of the power supply control system of a ring main unit described in the present invention, the power management module includes:

[0015] Power input monitoring unit: real-time monitoring of key parameters of voltage, current and frequency of main power supply, backup power supply and green energy;

[0016] Automatic switching unit: controls automatic switching of different power sources according to load demand and power status;

[0017] Power Priority Management Unit: Set the priority of different power sources according to the availability of power sources and system configuration.

[0018] As a preferred solution of the power supply control system of a ring main unit described in the present invention, the load monitoring and prediction module includes:

[0019] Load real-time monitoring unit: collects the current and voltage data of each load in real time through sensors and transmits them to the control system;

[0020] Load forecasting unit: forecast future load, determine the trend of power demand changes, and predict the load L(t) at time t;

[0021] Load warning unit: issues a warning when the load exceeds the normal range, and provides a basis for subsequent automatic adjustment of power supply and load distribution.

[0022] As a preferred solution of the power supply control system of a ring main unit described in the present invention, the power supply selection and load balancing module includes:

[0023] Power selection strategy unit: automatically selects main power, backup power and green energy according to load demand and power status;

[0024] Load balancing unit: According to the output power of each power supply and the demand for load distribution, it automatically adjusts the output power of each power supply to maintain the balance of the system load. The total load power P total (t) can be distributed to multiple power sources, The output power P of each power supply is calculated by the load balancing algorithm i (t).

[0025] As a preferred solution of the power supply control system of a ring main unit described in the present invention, the power supply selection and load balancing module further includes:

[0026] Dynamic load adjustment unit: According to the real-time load changes, the output of each power supply is dynamically adjusted to minimize the difference between the output power of the power supply and the target load to ensure that no power supply overload occurs.

[0027] As a preferred solution of the power supply control system of a ring main unit described in the present invention, the fault detection module includes:

[0028] Fault monitoring and diagnosis unit: monitors the working status of power supply equipment and load equipment and detects any abnormal conditions. The diagnosis algorithm is as follows:

[0029] ΔV i (t)=|V i (t)-V i (t-1)|>∈

[0030] Where: V i (t) represents the voltage value of the i-th power supply at time t; ΔV i (t) is the voltage change; ∈ is the voltage change tolerance threshold. If the voltage change exceeds the threshold, fault detection is triggered and the backup power supply is started;

[0031] Fault reporting and notification unit: When a fault occurs, the system generates a detailed fault report and notifies the operation and maintenance personnel via SMS and email.

[0032] As a preferred solution of the power supply control system of a ring main unit described in the present invention, the data acquisition and transmission module includes:

[0033] Data acquisition unit: collects voltage, current, load, ambient temperature, humidity and other data through the sensor network, and sends the data to the central control system;

[0034] Communication unit: provides a reliable communication mechanism and supports data transmission to the upper control system through wireless and wired communications;

[0035] Data encryption and protection unit: ensures that all transmitted data has high security and prevents data leakage and tampering.

[0036] As a preferred solution of the power supply control system of a ring main unit described in the present invention, the central control and decision-making module includes:

[0037] Decision-making unit: Make the best decision based on the real-time data collected by the system, load forecast results and power supply status. The algorithm is as follows:

[0038]

[0039] Where: L t is the load demand at the predicted time t; P available The available power that the current power supply can provide.

[0040] As a preferred solution of the power supply control system of a ring main unit described in the present invention, the user interface and remote monitoring module include:

[0041] Monitoring panel unit: displays each power supply, load, switch status, and system alarm information, facilitating immediate inspection by operation and maintenance personnel;

[0042] Remote control unit: allows operation and maintenance personnel to remotely adjust power selection and load distribution parameters through PC and mobile devices;

[0043] Alarm and notification unit: When the system is abnormal, fault reports and alarm notifications are automatically pushed to relevant personnel to ensure timely response.

[0044] In a second aspect, an embodiment of the present invention provides a power supply control method for a ring main unit, comprising the following steps:

[0045] S1. The system obtains the status information and load demand data of each power supply in real time through the power monitoring module;

[0046] S2, the load monitoring and prediction module monitors the power demand of each load section in real time and predicts the future load. The central control and decision-making module selects the appropriate power source according to the grid load situation. After the power source is selected, the load balancing unit calculates the load distribution of each power source;

[0047] S3. Based on real-time monitoring data, the dynamic load adjustment unit accurately calculates the load distribution of each power supply, and reasonably distributes it according to the power supply health status, power supply load capacity and load importance to ensure load balance among the power supplies;

[0048] S4, monitor the power supply in real time through the fault monitoring and diagnosis unit to see if there is any fault, and automatically select the backup power supply for switching when a power supply fault is found;

[0049] S5. Through real-time data analysis, dynamically adjust power selection and load distribution strategies to ensure that the entire system is continuously in a stable and optimal state.

[0050] Beneficial effects of the present invention:

[0051] Firstly, by integrating multiple power sources and combining with a real-time load balancing strategy, the present invention can automatically select the current optimal power source, reduce power waste, and improve the overall power supply efficiency; secondly, it can monitor the power grid load in real time. When a power source fails or is overloaded, the system can issue an early warning and actively switch to a more stable power source to avoid sudden power outages affecting normal power supply and improve the reliability of the entire system; at the same time, the present invention can ensure that seamless switching can be achieved without human intervention when a power source fails or load fluctuates, preventing equipment damage, data loss or production stagnation caused by power outages, thereby reducing economic losses; finally, the present invention uses dynamic load balancing technology to reasonably allocate the power supply tasks of each power source, avoid local overload, and reduce equipment maintenance and replacement costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0053] Figure 1 This is a schematic diagram of a power supply control system for a ring main unit proposed by the present invention;

[0054] Figure 2 The present invention provides a flow chart of a method for controlling power supply of a ring main unit. DETAILED DESCRIPTION

[0055] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0056] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0057] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0058] Reference Figure 1-2 The present invention provides a power supply control system for a ring main unit, comprising:

[0059] Power management module: used to manage multiple power inputs, including main power, backup power, and green energy, and to achieve seamless power switching in the event of power failure or load fluctuation through automatic switching;

[0060] Load monitoring and prediction module: monitors the power demand of each load section in real time and predicts future load;

[0061] Power selection and load balancing module: Based on the data from the power management module and the load monitoring and prediction module, it determines the most suitable power supply to meet the current load demand, and performs load balancing among multiple power supplies to ensure the best match between power supply and load;

[0062] Fault detection module: responsible for monitoring the operating status of the power supply and load system, timely detecting power failures, load abnormalities and other problems, and triggering automatic switching operations to maintain the continuity of power supply;

[0063] Data acquisition and transmission module: responsible for collecting real-time data from the ring main unit and transmitting the data to the central control system for processing and analysis. This module ensures the reliable transmission of all monitoring, prediction and control information;

[0064] Central control and decision-making module: Makes decisions based on real-time monitoring and prediction results, controls the operation of the system, and interacts with users. It performs tasks such as load prediction, automatic power selection, load balancing, and schedules the work of other modules through control instructions;

[0065] User interface and remote monitoring module: Provides real-time monitoring, remote control and maintenance functions for operators, ensuring that operation and maintenance personnel can understand the working status of the ring main unit at any time, adjust the system configuration in time, and ensure stable operation of the system.

[0066] Among them, the power management module includes:

[0067] Power input monitoring unit: real-time monitoring of key parameters of voltage, current and frequency of main power supply, backup power supply and green energy;

[0068] Automatic switching unit: controls automatic switching of different power sources according to load demand and power status;

[0069] Power Priority Management Unit: Set the priority of different power sources according to the availability of power and system configuration, such as giving priority to green energy and using the main power source when power demand is high.

[0070] Furthermore, the load monitoring and prediction module includes:

[0071] Load real-time monitoring unit: collects the current and voltage data of each load in real time through sensors and transmits them to the control system;

[0072] Load forecasting unit: forecasts future loads, determines the trend of power demand changes, and predicts the load L(t) at time t. The specific forecasting formula is as follows:

[0073] L(t)=β0+β1·L(t-1)+β2·L(t-2)+…+β n ·L(tn)+γ1·X1(t)+γ2·X2(t)…+γ m ·X m (t)

[0074] Where: L(t) represents the load at time t; L(tn) represents the load history data at the past n times; X1(t), X2(t), ..., X m (t) is external factor data, such as temperature, season, weekdays and weekends, etc.; β0, β1, ..., β n is the regression coefficient of the load history data; γ1, γ2, ..., γ m is the regression coefficient of the external factors; the model assumes that the load demand is linearly affected by the historical load and external factors;

[0075] Load warning unit: issues a warning when the load exceeds the normal range, and provides a basis for subsequent automatic adjustment of power supply and load distribution.

[0076] Furthermore, the power selection and load balancing module includes:

[0077] Power selection strategy unit: automatically selects the main power supply, backup power supply and green energy according to load demand and power status. The system will make a selection based on the output capacity, priority and load matching of the power supply.

[0078] Load balancing unit: According to the output power of each power supply and the demand for load distribution, it automatically adjusts the output power of each power supply to maintain the balance of the system load. The total load power P total (t) can be distributed to multiple power sources, The output power P of each power supply is calculated by the load balancing algorithm i (t),

[0079] The load balancing algorithm is as follows:

[0080]

[0081] Where: P total (t) is the total load power; P i (t) is the output power of the i-th power supply at time t; L i (t is the load carried by the i-th power supply; N is the number of power supplies. The output power of the power supply is calculated by the above formula to ensure that the load distribution of each power supply is reasonable and uniform, avoiding the risk of power supply overload.

[0082] Furthermore, the power selection and load balancing module also includes:

[0083] Dynamic load adjustment unit: According to the real-time load changes, the output of each power supply is dynamically adjusted to minimize the difference between the output power of the power supply and the target load to ensure that no power supply overload occurs. The optimization algorithm is as follows:

[0084]

[0085] Where: P i (t) is the power output of the ith power source at time t; P target (t) is the target load for each power source; w i The weight coefficient for each power supply is used to adjust the priority of different power supply loads. The weight coefficient can be set according to factors such as the health status of the power supply, the remaining capacity of the power supply, and the importance of the load. (By minimizing the output power P of each power supply i (t) and target load P target The difference between (t) makes the load of each power source as close to the target load as possible, thus achieving the regulation optimization effect.

[0086] Furthermore, the fault detection module includes:

[0087] Fault monitoring and diagnosis unit: monitors the working status of power supply equipment and load equipment and detects any abnormal conditions. The diagnosis algorithm is as follows:

[0088] ΔV i (t)=|V i (t)-V i (t-1)|>∈

[0089] Where: V i (t) represents the voltage value of the i-th power supply at time t; ΔV i (t) is the voltage change; ∈ is the voltage change tolerance threshold. If the voltage change exceeds the threshold, fault detection is triggered and the backup power supply is started;

[0090] Fault reporting and notification unit: When a fault occurs, the system generates a detailed fault report and notifies the operation and maintenance personnel via SMS and email.

[0091] Furthermore, the data acquisition and transmission module includes:

[0092] Data acquisition unit: collects voltage, current, load, ambient temperature, humidity and other data through the sensor network, and sends the data to the central control system;

[0093] Communication unit: provides a reliable communication mechanism and supports data transmission to the upper control system through wireless and wired communications;

[0094] Data encryption and protection unit: ensures that all transmitted data has high security and prevents data leakage and tampering.

[0095] Furthermore, the central control and decision-making module includes:

[0096] Decision-making unit: Makes optimal decisions based on real-time data collected by the system, load forecast results, and power supply status, such as power supply selection, load distribution, and fault switching. The algorithm is as follows:

[0097]

[0098] Where: L t is the load demand at the predicted time t; P available The available power that the current power supply can provide; It indicates the ratio of load demand to available power. The larger the ratio is, the more suitable the power source is for the current load. Based on the predicted load demand, the most suitable power source is automatically selected to improve power supply efficiency and reduce unnecessary power waste. As the load changes, the system can continuously adjust the power supply strategy to ensure the rationality of power supply use.

[0099] Furthermore, the user interface and remote monitoring module include:

[0100] Monitoring panel unit: displays each power supply, load, switch status, and system alarm information, facilitating immediate inspection by operation and maintenance personnel;

[0101] Remote control unit: allows operation and maintenance personnel to remotely adjust power selection and load distribution parameters through PC and mobile devices;

[0102] Alarm and notification unit: When the system is abnormal, fault reports and alarm notifications are automatically pushed to relevant personnel to ensure timely response.

[0103] This embodiment also provides a power supply control method for a ring main unit, comprising the following steps:

[0104] S1. The system obtains the status information of each power supply (such as power output, voltage, current, temperature, etc.) and load demand data in real time through the power supply monitoring module;

[0105] S2, the load monitoring and prediction module monitors the power demand of each load section in real time and predicts the future load. The central control and decision-making module selects the appropriate power source according to the load situation of the power grid. After the power source is selected, the load balancing unit calculates the load distribution of each power source. This process is not only based on the load demand, but also considers the health status of the power source, the remaining power and other factors to ensure that the load distribution is both reasonable and efficient;

[0106] S3. Based on real-time monitoring data, the dynamic load adjustment unit accurately calculates the load distribution of each power supply, and reasonably distributes it according to the power supply health status, power supply load capacity and load importance to ensure load balance among the power supplies;

[0107] S4, monitor the power supply in real time through the fault monitoring and diagnosis unit to see if there is any fault, and automatically select the backup power supply for switching when a power supply fault is found;

[0108] S5. Through real-time data analysis, dynamically adjust power selection and load distribution strategies to ensure that the entire system is continuously in a stable and optimal state.

[0109] In summary, the present invention not only improves the stability and reliability of power supply, but also can optimize power use through intelligent scheduling strategies, improve energy utilization, and reduce maintenance and operating costs. Compared with the existing power supply control system, the present invention has a higher level of intelligence and stronger adaptability, and can effectively solve the problems of low power utilization efficiency, uneven load scheduling, and slow switching response in traditional systems.

[0110] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A power supply control system for a ring main unit, characterized in that: include: Power management module: used to manage multiple power inputs, including main power, backup power, and green energy, and to achieve seamless power switching in the event of power failure or load fluctuation through automatic switching; Load monitoring and prediction module: monitors the power demand of each load section in real time and predicts future load; Power selection and load balancing module: Based on the data from the power management module and the load monitoring and prediction module, it determines the most suitable power source to meet the current load demand and balances the load among multiple power sources; Fault detection module: responsible for monitoring the operating status of the power supply and load system; Data acquisition and transmission module: responsible for collecting real-time data in the ring main unit and transmitting the data to the central control system for processing and analysis; Central control and decision-making module: Make decisions based on real-time monitoring and prediction results, control the operation of the system, and interact with users; User interface and remote monitoring module: Provides real-time monitoring, remote control and maintenance functions for operators, ensuring that operation and maintenance personnel can understand the working status of the ring main unit at any time, adjust the system configuration in time, and ensure stable operation of the system.

2. The power supply control system of a ring main unit according to claim 1, characterized in that: The power management module comprises: Power input monitoring unit: real-time monitoring of key parameters of voltage, current and frequency of main power supply, backup power supply and green energy; Automatic switching unit: controls automatic switching of different power sources according to load demand and power status; Power Priority Management Unit: Set the priority of different power sources according to the availability of power sources and system configuration.

3. The power supply control system of a ring main unit according to claim 2, characterized in that: The load monitoring and prediction module includes: Load real-time monitoring unit: collects the current and voltage data of each load in real time through sensors and transmits them to the control system; Load forecasting unit: forecast future load, determine the trend of power demand changes, and predict the load L(t) at time t; Load warning unit: issues a warning when the load exceeds the normal range, and provides a basis for subsequent automatic adjustment of power supply and load distribution.

4. The power supply control system of a ring main unit according to claim 3, characterized in that: The power selection and load balancing module includes: Power selection strategy unit: automatically selects main power, backup power and green energy according to load demand and power status; Load balancing unit: According to the output power of each power supply and the demand for load distribution, it automatically adjusts the output power of each power supply to maintain the balance of the system load. The total load power P total (t) can be distributed to multiple power sources, The output power P of each power supply is calculated by the load balancing algorithm i (t).

5. The power supply control system of a ring main unit according to claim 4, characterized in that: The power selection and load balancing module also includes: Dynamic load adjustment unit: According to the real-time load changes, the output of each power supply is dynamically adjusted to minimize the difference between the output power of the power supply and the target load to ensure that no power supply overload occurs.

6. The power supply control system of a ring main unit according to claim 5, characterized in that: The fault detection module comprises: Fault monitoring and diagnosis unit: monitors the working status of power supply equipment and load equipment and detects any abnormal conditions. The diagnosis algorithm is as follows: ΔV i (t)=|V i (t)-V i (t-1)|>∈ Where: V i (t) represents the voltage value of the i-th power supply at time t; ΔV i (t) is the voltage change; ∈ is the voltage change tolerance threshold. If the voltage change exceeds the threshold, fault detection is triggered and the backup power supply is started; Fault reporting and notification unit: When a fault occurs, the system generates a detailed fault report and notifies the operation and maintenance personnel via SMS and email.

7. The power supply control system of a ring main unit according to claim 6, characterized in that: The data acquisition and transmission module includes: Data acquisition unit: collects voltage, current, load, ambient temperature, humidity and other data through the sensor network, and sends the data to the central control system; Communication unit: provides a reliable communication mechanism and supports data transmission to the upper control system through wireless and wired communications; Data encryption and protection unit: ensures that all transmitted data has high security and prevents data leakage and tampering.

8. The power supply control system of a ring main unit according to claim 7, characterized in that: The central control and decision-making module includes: Decision-making unit: Make the best decision based on the real-time data collected by the system, load forecast results and power supply status. The algorithm is as follows: Where: L t is the load demand at the predicted time t; P available The available power that the current power supply can provide.

9. The power supply control system of a ring main unit according to claim 8, characterized in that: The user interface and remote monitoring module include: Monitoring panel unit: displays each power supply, load, switch status, and system alarm information, which is convenient for operation and maintenance personnel to conduct immediate inspection; Remote control unit: allows operation and maintenance personnel to remotely adjust power selection and load distribution parameters through PC and mobile devices; Alarm and notification unit: When the system is abnormal, fault reports and alarm notifications are automatically pushed to relevant personnel to ensure timely response.

10. A power supply control method for a ring main unit, based on a power supply control system for a ring main unit according to any one of claims 1 to 9, characterized in that: The steps include: S1. The system obtains the status information and load demand data of each power supply in real time through the power monitoring module; S2, the load monitoring and prediction module monitors the power demand of each load section in real time and predicts the future load. The central control and decision-making module selects the appropriate power source according to the grid load situation. After the power source is selected, the load balancing unit calculates the load distribution of each power source; S3. Based on real-time monitoring data, the dynamic load adjustment unit accurately calculates the load distribution of each power supply, and reasonably distributes it according to the power supply health status, power supply load capacity and load importance to ensure load balance among the power supplies; S4, monitor the power supply in real time through the fault monitoring and diagnosis unit to see if there is any fault, and automatically select the backup power supply for switching when a power supply fault is found; S5. Through real-time data analysis, dynamically adjust power selection and load distribution strategies to ensure that the entire system is continuously in a stable and optimal state.

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