Intelligent adjusting system and method for adjusting 0.4 kilovolt voltage in 10 kilovolt transformer area

Abstract

According to the intelligent adjusting system and method for adjusting the 0.4 kilovolt voltage in the 10 kilovolt transformer area, real-time monitoring, data analysis, intelligent decision making and automatic execution are integrated, the distribution transformer loss is reduced, the service life of power supply equipment is prolonged, and the economical efficiency and reliability of a power system are improved; the system comprises a voltage acquisition module used for acquiring three-phase voltage data and transmitting the data to a control module; the control module is used for receiving the data of the voltage acquisition module, analyzing and calculating the phase with relatively high voltage, and sending an instruction to the user switching execution module; the user switching execution module is used for receiving an instruction of the control module, selecting a single user on a phase with relatively low voltage and switching the single user to a phase with relatively high voltage; and the communication module is used for wirelessly uploading the switching time, the switching user and the voltage values before and after switching to a remote monitoring center.

Description

Technical Field

[0001] The present invention relates to the technical field of power distribution voltage adjustment, and in particular to an intelligent adjustment system for adjusting 0.4 kV voltage in a 10 kV station area. Background Art

[0002] In the 0.4 kV power supply network in the 10 kV area, three-phase voltage imbalance is common, which will cause some phase voltages to be too low, affecting the normal operation of users' electrical equipment. As power users' requirements for power supply quality continue to increase, the traditional voltage adjustment method relies on manual inspection and manual operation, which is inefficient and difficult to respond to voltage changes in a timely manner.

[0003] Three-phase voltage unbalance and low voltage problems and limitations of traditional voltage adjustment methods:

[0004] 1. Increased distribution transformer losses:

[0005] Three-phase imbalance will cause uneven current distribution in the transformer winding, thereby increasing copper loss and iron loss. Long-term loss increase will accelerate the aging of the transformer and shorten its service life.

[0006] 2. Reduce the service life of power supply equipment

[0007] Voltage imbalance can cause current fluctuations, leading to overheating and increased vibration of equipment such as motors, thereby reducing equipment performance and service life.

[0008] 3. The normal operation of users’ electrical equipment is affected

[0009] Such as insufficient brightness of lights, inability to start electrical appliances, etc.

[0010] 4. Manual inspection and manual operation:

[0011] Inefficiency makes it difficult to monitor voltage changes in real time and respond quickly. Manual operations may result in errors, leading to inaccurate adjustments. Voltage changes are dynamic, and manual inspections cannot respond in real time, which may result in voltage problems not being resolved in a timely manner.

[0012] In order to solve the above problems, a technical solution that can monitor voltage in real time and automatically optimize and adjust is urgently needed. Through dynamic monitoring and adjustment technology, the value and imbalance of three-phase voltage can be monitored in real time, and the three-phase load distribution can be optimized in real time to reduce distribution transformer losses. Summary of the invention

[0013] The present invention aims to address the technical defects of the prior art and provide an intelligent adjustment system and method for adjusting the voltage of 0.4 kV in a 10 kV substation, which integrates real-time monitoring, data analysis, intelligent decision-making and automatic execution, reduces distribution transformer losses, extends the service life of power supply equipment, and improves the economy and reliability of the power system.

[0014] The present invention discloses an intelligent adjustment system for adjusting 0.4 kV voltage in a 10 kV station area, which is characterized by comprising:

[0015] A voltage acquisition module is used to collect three-phase voltage data and transmit the data to a control module;

[0016] The control module is used to receive data from the voltage acquisition module, analyze and calculate the phase with higher voltage, and send instructions to the user switching execution module;

[0017] A user switching execution module is used to receive the instruction of the control module, select a single user on a phase with a lower voltage, and switch it to a phase with a higher voltage;

[0018] The communication module is used to wirelessly upload the switching time, switching user, and voltage values ​​before and after switching to the remote monitoring center.

[0019] Furthermore,

[0020] The voltage acquisition module includes a voltage sensor, a signal conditioning circuit, an analog-to-digital converter and a control interface. The voltage sensor is electrically connected to the control module. The voltage sensor adopts a Hall voltage sensor, which is respectively connected to the A phase, B phase and C phase of the 0.4 kV line to collect the three-phase voltage values ​​in real time.

[0021] Furthermore,

[0022] The user switching execution module adopts an intelligent power switch, and the user switching execution module is arranged near the front section down conductor of the user's electric meter box.

[0023] Furthermore,

[0024] The control module includes a microcontroller, a power management unit, a memory, and a data interface;

[0025] The microcontroller is equipped with an algorithm program for real-time analysis of voltage data, determining whether the voltage is lower than a preset range, and generating a corresponding switching instruction;

[0026] The power management unit is used to supply power to the voltage acquisition module, the control module, and the communication module;

[0027] The memory is used to store data;

[0028] The data interface is used to connect the voltage acquisition module and the user switching execution module.

[0029] Furthermore,

[0030] The communication module includes a wireless communication chip, an antenna and a communication interface, and the wireless communication chip includes a 4G / 5G module and a LORa module.

[0031] Furthermore,

[0032] The communication module wirelessly receives remote control instructions from a remote monitoring center, and transmits the remote control instructions to the control module through a communication interface.

[0033] Furthermore,

[0034] The algorithm program includes a priority rule for user switching, which gives priority to switching high-power users or users that are closer to the transformer.

[0035] Furthermore,

[0036] The preset range of the voltage is 210-230V.

[0037] Furthermore,

[0038] The intelligent power switch solid state relay.

[0039] The intelligent adjustment method for adjusting 0.4 kV voltage in a 10 kV area includes the following steps:

[0040] Step 1: The voltage acquisition module is connected to the three phases of the 0.4 kV line respectively, collects the three-phase voltage values ​​in real time, and converts the analog signal into a digital signal and transmits it to the control module through the data interface;

[0041] Step 2: The control module receives the three-phase voltage data transmitted by the voltage acquisition module, and uses the built-in voltage algorithm program to analyze the voltage to determine whether the voltage is lower than the preset range. If so, it is determined to be adjusted and a corresponding switching instruction is generated, otherwise no adjustment is made;

[0042] Step 3: the user switching execution module switches a single user of a phase with a lower voltage to a phase with a higher voltage according to the instruction of the control module;

[0043] Step 4: The communication module wirelessly uploads the switching time, switching user, and voltage values ​​before and after the switching to the remote monitoring center.

[0044] Compared with the prior art, the present invention has the following beneficial effects:

[0045] The present invention provides an intelligent adjustment system for adjusting 0.4 kV voltage in 10 kV area, which integrates real-time monitoring, data analysis, intelligent decision-making and automatic execution, and aims to optimize the voltage distribution of low-voltage power grid and improve the quality and efficiency of power supply;

[0046] 1. Voltage acquisition module

[0047] This module is responsible for real-time collection of three-phase voltage data, namely the voltage values ​​of phase A, phase B, and phase C. These data are the basis for subsequent analysis and adjustment, and the collected data is efficiently and stably transmitted to the control module;

[0048] 2. Control module

[0049] Receive the data transmitted by the voltage acquisition module, calculate the phase with higher voltage (i.e. the phase with higher voltage) through built-in algorithm analysis, combine historical data and real-time data, and comprehensively analyze to get the optimal phase adjustment strategy. According to the analysis results, send specific switching instructions to the user switching execution module, including the target phase to be switched, the user to be switched, etc.;

[0050] 3. User switching execution module

[0051] Receive instructions from the control module, automatically select one or more users on the phase with lower voltage (according to system settings and actual conditions), and switch their power supply to the phase with higher voltage, with fast and reliable switching operation;

[0052] 4. Communication module

[0053] Wirelessly upload the switching operation related information (such as switching time, switching user, voltage value before and after switching, etc.) to the remote monitoring center, which can view and analyze the data in real time to provide decision support for subsequent power management and optimization;

[0054] The cooperation of the above modules produces the following advantages:

[0055] 1. High degree of automation:

[0056] The automation of voltage monitoring and phase adjustment is realized without manual intervention, which greatly improves work efficiency;

[0057] 2. Low operation and maintenance costs:

[0058] Reduces the number of manual inspections and manual adjustments, and reduces operation and maintenance costs;

[0059] 3. Reduced distribution transformer losses: Through real-time monitoring and dynamic adjustment of voltage distribution, the loss of distribution transformers is reduced and the service life of power supply equipment is extended;

[0060] 4. Improved economic efficiency of power system:

[0061] It optimizes power supply, improves the economy and reliability of the power system, and brings more economic benefits to users and grid operators;

[0062] In summary, the intelligent adjustment system for adjusting 0.4 kV voltage in 10 kV substations is an efficient, intelligent and reliable power system management tool. It can effectively solve the 0.4 kV voltage imbalance and low voltage problems, improve the power supply quality, ensure the normal operation of user power equipment, automatically switch user phases without manual intervention, improve work efficiency, and reduce operation and maintenance costs. Through real-time monitoring and dynamic adjustment, it can reduce distribution transformer losses, extend the service life of power supply equipment, and improve the economy and reliability of the power system. The communication module realizes remote monitoring, which is convenient for power workers to grasp the voltage situation in the substation in time and deal with abnormal problems in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] Figure 1 This is a schematic diagram of the installation position of an embodiment of the present invention;

[0064] Figure 2 It is a flow chart of the present invention. DETAILED DESCRIPTION

[0065] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. All other embodiments obtained by ordinary technicians in the field without making creative work based on the embodiments of the present invention shall fall within the scope of protection of the present invention.

[0066] like Figures 1-2 As shown, it shows a specific embodiment of the present invention:

[0067] like Figures 1-2 As shown, the present invention discloses an intelligent adjustment system for adjusting 0.4 kV voltage in a 10 kV area, comprising:

[0068] A voltage acquisition module is used to collect three-phase voltage data and transmit the data to a control module;

[0069] The control module is used to receive data from the voltage acquisition module, analyze and calculate the phase with higher voltage, and send instructions to the user switching execution module;

[0070] A user switching execution module is used to receive the instruction of the control module, select a single user on a phase with a lower voltage, and switch it to a phase with a higher voltage;

[0071] The communication module is used to wirelessly upload the switching time, switching user, and voltage values ​​before and after switching to the remote monitoring center.

[0072] Preferably, Figure 1 As shown,

[0073] The voltage acquisition module includes a voltage sensor, a signal conditioning circuit, an analog-to-digital converter and a control interface. The voltage sensor is electrically connected to the control module. The voltage sensor adopts a Hall voltage sensor, which is respectively connected to the A phase, B phase and C phase of the 0.4 kV line to collect the three-phase voltage values ​​in real time.

[0074] The voltage acquisition module is used to accurately and in real time acquire the three-phase voltage values ​​of phase A, phase B, and phase C on the 0.4 kV line, providing a reliable basis for subsequent analysis and adjustment.

[0075] The voltage acquisition module is mainly composed of a voltage sensor (a Hall voltage sensor in this example), a signal conditioning circuit, an analog-to-digital converter (ADC) and a control interface. In order to ensure the accuracy and real-time performance of the data, the module in this embodiment uses a high-performance Hall voltage sensor as the core component and is electrically connected to the control module so that the collected voltage data can be transmitted to the control module in a timely manner for subsequent processing.

[0076] In this example, through specific circuit design, the Hall voltage sensor is used to measure the voltage value in the line. A high-resolution Hall voltage sensor is selected, and its measurement accuracy can reach ±0.1%. Within the voltage range of 0.4 kilovolts, the measurement error can be controlled within a very small range, meeting the requirements for accurate voltage measurement. At the same time, the Hall voltage sensor has a fast response speed and can capture instantaneous changes in voltage in real time, ensuring that the collected data can truly reflect the actual state of the power grid. Furthermore, the Hall voltage sensor has good electrical isolation performance, which can effectively isolate the electrical connection between the high-voltage line and the low-voltage control circuit, thereby improving the safety and reliability of the system.

[0077] The Hall voltage sensor is connected to the A phase, B phase, and C phase of the 0.4 kV line respectively, and collects the three-phase voltage value in real time through the built-in magnetic field sensing element and signal processing circuit. At the same time, the sensor also has the function of converting analog signals into digital signals for data transmission with the control module.

[0078] The collected three-phase voltage values ​​are processed by the Hall voltage sensor and transmitted to the control module in the form of digital signals. After receiving these data, the control module will perform further analysis and processing, such as calculating the effective value of the voltage, judging whether the voltage is balanced, etc. Based on the analysis results, the control module will send corresponding instructions to the user switching execution module to achieve dynamic adjustment of the voltage.

[0079] In summary, the voltage acquisition module and the Hall voltage sensor it uses play a vital role in the intelligent adjustment system. They not only ensure the accuracy and real-time performance of voltage data, but also provide reliable data support for subsequent voltage adjustment.

[0080] By continuously optimizing and improving the performance and functionality of this module, we can further enhance the overall performance and user experience of the intelligent adjustment system.

[0081] Preferably, Figure 1 As shown,

[0082] The user switching execution module adopts an intelligent power switch, and the user switching execution module is arranged near the front section down conductor of the user's electric meter box.

[0083] The user switching execution module is a key module in dealing with voltage imbalance and ensuring the continuity of user power consumption. It is designed to be installed near the down conductor in front of the user's meter box. Its main function is to intelligently switch a single user on a phase with a lower voltage to a phase with a higher voltage according to the instructions from the control module. This design aims to optimize power distribution, reduce problems caused by voltage imbalance, and ensure the continuity of user power consumption during the switching process.

[0084] The intelligent power switch can communicate with the control system, receive instructions from the control module, and perform corresponding switching operations according to the instructions. The remote monitoring function allows operation and maintenance personnel to monitor the working status of the switch in real time and discover and deal with potential problems in a timely manner.

[0085] The workflow of user switching execution module is as follows:

[0086] Voltage monitoring:

[0087] The control module continuously monitors the real-time data of the three-phase voltage, and by comparing the values ​​of the voltage of each phase, determines the phase with lower voltage and the user who needs to switch.

[0088] Command sending:

[0089] Once the user and phase to be switched are determined, the control module sends a switching instruction to the user switching execution module.

[0090] To perform the switch:

[0091] After the user switching execution module receives the instruction, the intelligent power switch will act quickly to switch the designated user from the phase with lower voltage to the phase with higher voltage.

[0092] Status feedback:

[0093] After the switch is completed, the user switch execution module will send status feedback to the control module to confirm that the switch operation has been successfully completed.

[0094] In summary, the user switching execution module helps to optimize power distribution, reduce the problems caused by voltage imbalance, and improve the stability and reliability of the power system.

[0095] Preferably, Figures 1-2 As shown,

[0096] The control module includes a microcontroller, a power management unit, a memory, and a data interface;

[0097] The microcontroller is equipped with an algorithm program for real-time analysis of voltage data, determining whether the voltage is lower than a preset range, and generating a corresponding switching instruction;

[0098] The power management unit is used to supply power to the voltage acquisition module, the control module, and the communication module;

[0099] The memory is used to store data;

[0100] The data interface is used to connect the voltage acquisition module and the user switching execution module.

[0101] The control module is the "brain" of the entire intelligent adjustment system, responsible for receiving voltage data, analyzing voltage conditions, generating and executing switching instructions, and managing communication with other modules and data storage.

[0102] The control module includes:

[0103] Microcontroller: It is the core of the control module and is responsible for executing the built-in algorithm program.

[0104] The built-in algorithm program analyzes the ABC three-phase voltage data transmitted by the voltage acquisition module in real time. The algorithm can determine whether the voltage is lower than the preset lower limit of the normal voltage range and generate corresponding switching instructions based on the voltage condition. The microcontroller is also responsible for communication and data exchange with other modules (such as voltage acquisition module, user switching execution module, and communication module).

[0105] The power management unit is responsible for providing a stable power supply for the control module, voltage acquisition module, communication module, etc. It includes functions such as voltage conversion, current limiting, and overvoltage protection to ensure that each module works in a safe power environment.

[0106] The memory is used to store important information such as voltage data, switching instructions, switching records, and also includes historical voltage data, switching operation logs, system configuration parameters, etc. In this embodiment, the memory can be flash memory, EEPROM or other non-volatile storage media to ensure that data is not lost after power failure.

[0107] The data interface is used to connect the voltage acquisition module and the user switching execution module. The data interface is responsible for receiving and sending data to ensure that the control module can communicate effectively with other modules.

[0108] Working principle: After the system is started, the voltage acquisition module continuously collects the abc three-phase voltage data and transmits it to the control module. The control module analyzes the voltage data in real time. When it is determined that a phase voltage is lower than the preset lower limit of the normal voltage range, it calculates the phase with higher voltage.

[0109] Subsequently, the control module sends an instruction to the user switching execution module to select a suitable single user on the phase with lower voltage and switch it to the phase with higher voltage.

[0110] After the switch is completed, the communication module uploads the relevant information of the switch (such as switching time, switching user, voltage values ​​before and after switching, etc.) to the remote monitoring center.

[0111] At the same time, the system continuously monitors the three-phase voltage and executes the above operations cyclically to maintain the balance and stability of the three-phase voltage.

[0112] In summary, the control module and its working principle ensure that the intelligent adjustment system can efficiently and accurately perform voltage adjustment tasks, maintain the balance and stability of the three-phase voltage, and improve the economy and reliability of the power system.

[0113] Preferably,

[0114] The communication module includes a wireless communication chip, an antenna and a communication interface, and the wireless communication chip includes a 4G / 5G module and a LORa module.

[0115] The communication module is responsible for realizing the communication between the control module and the remote monitoring center, ensuring the real-time transmission of data and the reception of remote instructions.

[0116] The communication module includes a wireless communication chip, an antenna and a communication interface. The wireless communication chip is responsible for the wireless transmission of data. It includes a 4G / 5G module and a LoRa module. These two modules support different communication protocols and frequency bands respectively, and can be selected according to actual needs.

[0117] The antenna is an indispensable component in wireless communication, responsible for receiving and transmitting wireless signals. It converts the electrical signals output by the wireless communication chip into electromagnetic waves and radiates them out, while receiving electromagnetic waves in space and converting them into electrical signals and inputting them into the wireless communication chip.

[0118] The communication interface is used to connect the control module and the wireless communication chip to realize data transmission and command reception, including serial communication interface (such as UART, SPI, I2C, etc.) or parallel interface, etc., depending on the interface type of the wireless communication chip and the control module for adaptation and selection.

[0119] The communication module uploads the collected three-phase voltage data and user switching information to the remote monitoring center in real time through wireless communication technology (such as 4G, 5G or LoRa). This enables the remote monitoring center to understand the operating status of the power system in real time and promptly discover and deal with problems such as voltage imbalance.

[0120] In summary, the communication module realizes the communication between the control module and the remote monitoring center through wireless communication technology, ensuring the real-time transmission of data and the reception of remote commands. The communication module has the characteristics of high transmission rate, low power consumption, high reliability and flexibility.

[0121] Preferably,

[0122] The communication module wirelessly receives remote control instructions from a remote monitoring center, and transmits the remote control instructions to the control module through a communication interface.

[0123] The communication module is also responsible for receiving remote control instructions sent by the remote monitoring center. These instructions may include switching users, adjusting voltage ranges, etc., to guide the control module to perform corresponding operations.

[0124] Through the communication module, staff can remotely manage and monitor the operating status of the power system.

[0125] This not only improves work efficiency, but also reduces operation and maintenance costs, making the power system more intelligent and convenient.

[0126] Preferably,

[0127] The algorithm program includes a priority rule for user switching, which gives priority to switching high-power users or users that are closer to the transformer.

[0128] The user switching priority rule in the algorithm program is a further improvement in the intelligent adjustment system, that is, when the voltage is unbalanced or the power distribution needs to be optimized, which users will be preferentially switched to the phase with higher voltage.

[0129] The user switching priority rules in the algorithm program are designed to intelligently select users who need to be switched according to the actual situation of the substation to ensure the stability and economy of the power system. These rules may include giving priority to switching high-power users or users who are closer to the transformer.

[0130] First, high-power users are usually more sensitive to voltage fluctuations, and changes in their power consumption have a greater impact on the overall voltage balance of the substation. Therefore, when the voltage is unbalanced, the algorithm will give priority to switching high-power users to phases with higher voltages to reduce the impact of voltage fluctuations on their power consumption and optimize the overall voltage balance of the substation.

[0131] Secondly, the priority switching is set for users who are closer to the transformer. The reason is that users who are closer to the transformer are usually at a shorter electrical distance from the transformer, so their voltage loss is relatively small. When the voltage is unbalanced, switching these users to the phase with higher voltage can more effectively utilize the capacity of the transformer, reduce voltage loss, and improve the overall voltage quality of the substation.

[0132] The present invention intelligently adjusts the user-side voltage through real-time monitoring and data analysis, wherein the algorithm program analyzes the degree and trend of voltage imbalance by real-time monitoring of the voltage and current data of each phase in the substation.

[0133] Based on the analysis results, the algorithm program will intelligently select the users who need to be switched and sort them according to priority rules.

[0134] Intelligent switching instruction generation: Based on the user list sorted by priority rules, the algorithm program will generate corresponding switching instructions. These instructions will be sent to the user switching execution module to guide it to perform the user switching operation. After the switching operation is completed, the algorithm program will evaluate the switching effect, including the improvement of voltage balance, changes in user power quality, etc.

[0135] Based on the evaluation results, the algorithm adjusts the priority rules or optimizes the switching strategy to further improve the stability and economy of the system.

[0136] Advantages of setting the priority rules in the present invention:

[0137] 1. Improve voltage quality

[0138] By giving priority to switching high-power users or users who are closer to the transformer, the algorithm can more effectively optimize the overall voltage balance of the substation and improve the voltage quality.

[0139] 2. Enhance system stability

[0140] The implementation of priority rules can reduce the impact of voltage fluctuations and current surges on the power system and enhance the stability and reliability of the system.

[0141] 3. Improve economic efficiency

[0142] By optimizing power distribution and reducing voltage losses, the algorithm can reduce power loss and operation and maintenance costs in the substation area and improve economic benefits.

[0143] In summary, the user switching priority rules in the algorithm program are an important part of the intelligent adjustment system. It realizes the intelligent management of user switching operations through real-time monitoring and analysis, intelligent switching instruction generation, and switching effect evaluation and feedback. The implementation of these priority rules not only improves voltage quality and system stability, but also brings significant economic benefits.

[0144] Preferably,

[0145] The preset range of the voltage is 210-230V.

[0146] In the power system, in order to ensure that the voltage of the distribution users is stable and within a safe range, the control module will preset a voltage normal range threshold and determine whether adjustment measures need to be taken based on the real-time monitored voltage data.

[0147] In the control module, the normal voltage range threshold is set to 210-230V. This range is determined based on the stable operation requirements of the power system and the rated voltage of the electrical equipment. Phase voltage lower limit: set to 210V. When the voltage of a phase is detected to be lower than this value, the system considers that the voltage of the phase is low and may affect the normal power consumption of the user.

[0148] Phase voltage upper limit: set to 230 V. Although voltage higher than this value may not necessarily cause problems immediately, long-term excessively high voltage may accelerate the aging of electrical equipment or even damage the equipment.

[0149] The control module will monitor the voltage data of each phase in the power distribution system in real time. When the voltage of a phase is found to be lower than the preset lower limit of 210V, the system will immediately start the corresponding judgment logic to generate a switching instruction. Based on the judgment result, the system will generate a corresponding switching instruction to switch the user with low voltage to the phase with higher voltage.

[0150] In summary, the voltage preset range of 210-230V and its related control logic are important measures to ensure voltage stability and user power safety in the power system. Through real-time monitoring, automatic adjustment and safety protection mechanisms, the system can effectively deal with voltage fluctuations and provide users with stable and reliable power supply.

[0151] Preferably, Figure 1 ,

[0152] The intelligent power switch solid state relay.

[0153] Intelligent power switch solid-state relay is a new type of contactless switching device composed of solid-state electronic components.

[0154] Its response time is less than 10 milliseconds, and it can achieve fast, arc-free switching, ensuring the continuity of power consumption during user switching, thereby effectively reducing the impact on users and the power grid during switching.

[0155] When the control signal is applied to the input end, the coupling circuit transmits the signal to the trigger circuit, which in turn drives the switch circuit to work, thereby realizing the on-off control of the solid-state relay.

[0156] In summary, the intelligent power switch solid-state relay is the preferred choice for this solution due to its fast response, arc-free switching, good stability and complete protection functions.

[0157] The intelligent adjustment method for adjusting 0.4 kV voltage in a 10 kV area includes the following steps:

[0158] Step 1: The voltage acquisition module is connected to the three phases of the 0.4 kV line respectively, collects the three-phase voltage values ​​in real time, and converts the analog signal into a digital signal and transmits it to the control module through the data interface;

[0159] Step 2: The control module receives the three-phase voltage data transmitted by the voltage acquisition module, and uses the built-in voltage algorithm program to analyze the voltage to determine whether the voltage is lower than the preset range. If so, it is determined to be adjusted and a corresponding switching instruction is generated, otherwise no adjustment is made;

[0160] Step 3: the user switching execution module switches a single user of a phase with a lower voltage to a phase with a higher voltage according to the instruction of the control module;

[0161] Step 4: The communication module wirelessly uploads the switching time, switching user, and voltage values ​​before and after the switching to the remote monitoring center.

[0162] This method is mainly used to intelligently adjust the 0.4 kV voltage in the 10 kV substation to ensure that the voltage is stable within a given preset range, thereby improving power supply quality and user satisfaction.

[0163] Through real-time monitoring, analysis and intelligent switching, this method can automatically respond to voltage fluctuations and achieve dynamic voltage balance.

[0164] It completes the dynamic adjustment of voltage according to the following steps:

[0165] Step 1: Voltage acquisition and transmission

[0166] Voltage acquisition module: This module is responsible for connecting to the three phases (Phase A, Phase B, Phase C) of the 0.4 kV line and collecting the voltage values ​​of the three phases in real time.

[0167] Analog signal to digital signal conversion: The collected analog voltage signal will be converted into a digital signal for subsequent processing and analysis.

[0168] Data transmission: Digital signals are transmitted to the control module through the data interface.

[0169] Step 2: Voltage Analysis and Command Generation

[0170] Receiving data: The control module receives the three-phase voltage data transmitted by the voltage acquisition module.

[0171] Voltage algorithm program: Use the built-in voltage algorithm program to analyze the received voltage data.

[0172] Judgment and instruction generation: judge whether the voltage is lower than the preset range. If so, it is judged that adjustment is required and the corresponding switching instruction is generated; otherwise, no adjustment is performed.

[0173] Step 3: User switching execution

[0174] Instruction reception: The user switches the execution module to receive instructions from the control module.

[0175] Switching operation: According to the instruction, a single user with a lower voltage phase is switched to a higher voltage phase. For example, when the voltage of phase A is lower than a certain threshold and the voltage of phase B is higher than that of phase C, the user of phase A is switched to phase B.

[0176] Switch operation: When switching, the switch of the original phase (such as A' switch) needs to be disconnected, and the switch of the target phase (such as B' switch) needs to be closed. At the same time, it is necessary to determine whether the incoming line connection terminal is depressurized to ensure the safety and reliability of the switching.

[0177] Step 4: Communication and Remote Monitoring

[0178] Wireless upload: The communication module is responsible for wirelessly uploading key information such as switching time, switching user, and voltage values ​​before and after switching to the remote monitoring center.

[0179] Remote monitoring: The remote monitoring center can view and analyze this information in real time to monitor and evaluate the voltage regulation effect.

[0180] by Figures 1-2 Taking the embodiment shown as an example, when a user is connected to the 0.4 kV outgoing line A phase in the substation, if the voltage of phase A is lower than a certain threshold and the current value is greater than that of phases B and C, and the voltage of phase B is higher than that of phase C and the current of phase B is less than that of phase C, the system will perform the following operations:

[0181] Disconnect switch A': First, disconnect the switch A' of the user connected to phase A to ensure safety during the switching process.

[0182] Determine if the voltage is lost: After disconnecting the A' switch, the system needs to determine if the incoming line connection terminal has lost voltage. This is to ensure that the circuit is in a safe state before closing the B' switch.

[0183] Close the B' switch: After confirming that the incoming line connection terminal has lost pressure, the system closes the switch B' of the user connected to phase B to switch the user to phase B.

[0184] Through the above operations, the system realizes intelligent adjustment of 0.4 kV voltage, ensuring voltage stability and power supply quality.

[0185] This method realizes intelligent adjustment of 0.4 kV voltage under 10 kV substation through real-time monitoring, analysis and intelligent switching. This method has the advantages of high degree of automation, accurate adjustment, safety and reliability, and can significantly improve power supply quality and user satisfaction.

[0186] At the same time, through real-time monitoring and evaluation by the remote monitoring center, the voltage adjustment strategy can be further optimized and the overall performance of the system can be improved.

[0187] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the field without departing from the purpose of the present invention. These changes involve related technologies well known to those skilled in the art, which all fall within the scope of protection of the patent of the present invention.

[0188] Many other changes and modifications may be made without departing from the concept and scope of the present invention.It should be understood that the present invention is not limited to the specific embodiments, and the scope of the present invention is defined by the appended claims.

Claims

1. An intelligent voltage adjustment system for adjusting 0.4 kV voltage in a 10 kV area, characterized in that: include: A voltage acquisition module is used to collect three-phase voltage data and transmit the data to a control module; The control module is used to receive data from the voltage acquisition module, analyze and calculate the phase with higher voltage, and send instructions to the user switching execution module; A user switching execution module is used to receive the instruction of the control module, select a single user on a phase with a lower voltage, and switch it to a phase with a higher voltage; The communication module is used to wirelessly upload the switching time, switching user, and voltage values ​​before and after switching to the remote monitoring center.

2. The intelligent adjustment system for adjusting 0.4 kV voltage in a 10 kV area according to claim 1 is characterized in that: The voltage acquisition module includes a voltage sensor, a signal conditioning circuit, an analog-to-digital converter and a control interface. The voltage sensor is electrically connected to the control module. The voltage sensor adopts a Hall voltage sensor, which is respectively connected to the A phase, B phase and C phase of the 0.4 kV line to collect the three-phase voltage values ​​in real time.

3. The intelligent adjustment system for adjusting 0.4 kV voltage in a 10 kV area according to claim 2 is characterized in that: The user switching execution module adopts an intelligent power switch, and the user switching execution module is arranged near the front section down conductor of the user's electric meter box.

4. The intelligent adjustment system for adjusting 0.4 kV voltage in a 10 kV area according to any one of claims 1 to 3, characterized in that: The control module includes a microcontroller, a power management unit, a memory, and a data interface; The microcontroller is equipped with an algorithm program for real-time analysis of voltage data, determining whether the voltage is lower than a preset range, and generating a corresponding switching instruction; The power management unit is used to supply power to the voltage acquisition module, the control module, and the communication module; The memory is used to store data; The data interface is used to connect the voltage acquisition module and the user switching execution module.

5. The intelligent adjustment system for adjusting 0.4 kV voltage in a 10 kV area according to claim 4 is characterized in that: The communication module includes a wireless communication chip, an antenna and a communication interface, and the wireless communication chip includes a 4G / 5G module and a LORa module.

6. The intelligent adjustment system for adjusting 0.4 kV voltage in a 10 kV area according to claim 5 is characterized in that: The communication module wirelessly receives remote control instructions from a remote monitoring center, and transmits the remote control instructions to the control module through a communication interface.

7. The intelligent adjustment system for adjusting 0.4 kV voltage in a 10 kV area according to claim 6 is characterized in that: The algorithm program includes a priority rule for user switching, which gives priority to switching high-power users or users that are closer to the transformer.

8. The intelligent adjustment system for adjusting 0.4 kV voltage in a 10 kV area according to claim 7 is characterized in that: The preset range of the voltage is 210-230V.

9. The intelligent adjustment method for adjusting 0.4 kV voltage in a 10 kV area according to claim 9 is characterized in that: The intelligent power switch solid state relay.

10. An intelligent adjustment method for adjusting 0.4 kV voltage in a 10 kV area, characterized in that: The intelligent adjustment system for adjusting 0.4 kV voltage in a 10 kV area as claimed in any one of claims 1 to 9 comprises the following steps: Step 1: The voltage acquisition module is connected to the three phases of the 0.4 kV line respectively, collects the three-phase voltage values ​​in real time, and converts the analog signal into a digital signal and transmits it to the control module through the data interface; Step 2: The control module receives the three-phase voltage data transmitted by the voltage acquisition module, and uses the built-in voltage algorithm program to analyze the voltage to determine whether the voltage is lower than the preset range. If so, it is determined to be adjusted and a corresponding switching instruction is generated, otherwise no adjustment is made; Step 3: the user switching execution module switches a single user of a phase with a lower voltage to a phase with a higher voltage according to the instruction of the control module; Step 4: The communication module wirelessly uploads the switching time, switching user, and voltage values ​​before and after the switching to the remote monitoring center.

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