Low voltage regulating device and method applied to 0.4 kV lines

Abstract

The application relates to the technical field of electric energy regulation, in particular to a low-voltage regulating device and method applied to a 0.4kV line, wherein the device comprises a current metering assembly, an energy storage regulating assembly and a controller; the current metering assembly comprises a first current metering module, a second current metering module and a third current metering module; one end of the first current metering module is connected with a transformer, and the other end of the first current metering module is respectively connected with the energy storage regulating assembly, the second current metering module and the third current metering module; the energy storage regulating assembly is respectively connected with the second current metering module and the third current metering module and is connected to a power consumption load side through the second current metering module and the third current metering module; and the controller is respectively connected with the first current metering module, the second current metering module, the third current metering module and the energy storage regulating assembly, so that the low-voltage problem of the 0.4kV line during the peak load period is solved.

Description

Technical Field

[0001] This invention relates to the field of power regulation technology, and in particular to a low voltage regulation device and method for 0.4kV lines. Background Technology

[0002] In the existing power system, 0.4kV low-voltage distribution lines are an important component and the basis for realizing direct connection between the power system and the power supply unit. Therefore, 0.4kV low-voltage distribution lines have an impact on the overall power supply, and it is necessary to ensure the proper operation of 0.4kV low-voltage distribution lines.

[0003] Under normal load conditions, the 0.4kV line operates at a normal voltage. However, during peak summer seasons, when the load peaks, the low voltage problem of the 0.4kV line increases dramatically, making it difficult to transmit good power quality. This also reduces the overall efficiency of the distribution network, increases power supply costs, and in extreme cases, can even burn out users' electrical facilities and affect the operation of existing grid equipment. Therefore, how to solve the low voltage problem of the 0.4kV line during peak summer seasons and improve voltage quality during this period has become a technical problem that needs to be solved. Summary of the Invention

[0004] This invention provides a low-voltage regulation device and method for 0.4kV lines, used to solve the low-voltage problem of 0.4kV lines during peak summer seasons.

[0005] The present invention provides a low voltage regulation device for a 0.4kV line, comprising: a current metering component, an energy storage regulation component, and a controller;

[0006] The current metering component includes a first current metering module, a second current metering module, and a third current metering module;

[0007] One end of the first current metering module is connected to the transformer, and the other end of the first current metering module is connected to the energy storage regulation component, the second current metering module and the third current metering module respectively;

[0008] The energy storage regulation component is connected to the second current metering module and the third current metering module respectively, and is connected to the power load side through the second current metering module and the third current metering module;

[0009] The controller is connected to the first current metering module, the second current metering module, the third current metering module, and the energy storage regulating component, respectively. It is used to receive the first current from the first current metering module, the second current from the second current metering module, and the third current from the third current metering module, and to determine the operating state of the power system based on the first current, the second current, and the third current. When the operating state is the peak state, the controller adjusts the state of the energy storage regulating component to the discharge state.

[0010] Optionally, the controller is specifically used to calculate the sum of the second current and the third current to obtain the target load current, and to determine whether the first current is greater than the target load current. If not, the controller determines that the operating state is a peak state and adjusts the state of the energy storage regulating component to a discharge state; if so, the controller determines that the operating state is a valley state and adjusts the state of the energy storage regulating component to a charging state.

[0011] Optionally, the energy storage regulation component includes: three sets of inverter modules connected in parallel;

[0012] Each inverter module group includes a controllable load switch, a capacitor, a first controllable circuit breaker, a second controllable circuit breaker, and an inverter; the controllable load switch is connected to the capacitor, the capacitor is connected to the first controllable circuit breaker, and the first controllable circuit breaker is connected to the inverter; the two ends of the second controllable circuit breaker are respectively connected to the controllable load switch and the inverter.

[0013] The controller is connected to the controllable load switch, the first controllable circuit breaker, and the second controllable circuit breaker, respectively.

[0014] Optionally, the controller includes a first register, a second register, a third register, and a fourth register;

[0015] The first register is connected to the first current metering module and is used to store the first current;

[0016] The second register is connected to the second current metering module and is used to store the second current;

[0017] The third register is connected to the third current metering module and is used to store the third current;

[0018] The fourth register is connected to the first register, the second register, the third register, the controllable load switch, the first controllable circuit breaker, and the second controllable circuit breaker, respectively. It is used to calculate the sum of the second current and the third current to obtain the target load current, and to determine whether the first current is greater than the target load current. If so, the operating state is determined to be a valley state, and a disconnection signal is output to the first controllable circuit breaker and the second controllable circuit breaker; otherwise, the operating state is determined to be a peak state, and a disconnection signal is output to the controllable load switch.

[0019] Optionally, the device further includes a load switch assembly and a circuit breaker switch assembly, the load switch assembly including a first load switch; the circuit breaker switch assembly including a first circuit breaker switch and a second circuit breaker switch;

[0020] The first current metering module and the energy storage regulating component are both connected to the first load switch; the first load switch is connected to the first circuit breaker switch and the second circuit breaker switch respectively;

[0021] The first circuit breaker switch is connected to the second current metering module;

[0022] The second circuit breaker switch is connected to the third current metering module.

[0023] Optionally, it includes a surge arrester assembly; the surge arrester assembly includes a first surge arrester;

[0024] The other end of the transformer is connected to the first surge arrester.

[0025] Optionally, a fuse may be included;

[0026] The other end of the transformer is connected to the fuse.

[0027] Optionally, the load switch assembly includes a second load switch;

[0028] The fuse is connected to the second load switch.

[0029] Optionally, it may also include a communication module;

[0030] The communication module is connected to both the controller and the mobile terminal.

[0031] The present invention also provides a low-voltage regulation method for 0.4kV lines, applied to the apparatus described in any of the preceding claims, the method comprising:

[0032] Receive the first current from the first current metering module, the second current from the second current metering module, and the third current from the third current metering module;

[0033] Based on the first current, the second current, and the third current, the operating state of the power system is determined. When the operating state is peak time, the state of the energy storage regulating component is adjusted to discharge state.

[0034] Another aspect of the present invention provides a method comprising:

[0035] As can be seen from the above technical solutions, the present invention has the following advantages:

[0036] This invention provides a low-voltage regulation device for 0.4kV lines. The device includes: a current metering component, an energy storage regulation component, and a controller. The current metering component includes a first current metering module, a second current metering module, and a third current metering module. One end of the first current metering module is connected to a transformer, and the other end of the first current metering module is connected to the energy storage regulation component, the second current metering module, and the third current metering module, respectively. The energy storage regulation component is connected to the second current metering module and the third current metering module, and is connected to the load side through the second current metering module and the third current metering module. The controller is connected to the first current metering module, the second current metering module, the third current metering module, and the energy storage regulation component, respectively, and is used to receive a first current from the first current metering module, a second current from the second current metering module, and a third current from the third current metering module, and to determine the operating state of the power system based on the first current, the second current, and the third current. When the operating state is a peak state, the controller adjusts the state of the energy storage regulation component to a discharge state.

[0037] In this invention, the current metering component is used to detect the current data of the main grid and the load side during peak and valley periods of electricity consumption. The controller is used to determine the operating status of the power system based on the current data of the current metering component. When the operating status is peak time, the state of the energy storage regulating component is adjusted to the discharge state, so that the energy storage regulating component discharges and realizes voltage compensation for the 0.4kV line. Therefore, the device provided in this embodiment can solve the low voltage problem of the 0.4kV line during the peak summer season, thereby improving the power supply quality of the 0.4kV line. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 A schematic diagram of the principle of a low voltage regulation device applied to a 0.4kV line provided in an embodiment of the present invention;

[0040] Figure 2 This is a schematic diagram of the structure of the energy storage regulation component provided in an embodiment of the present invention;

[0041] Figure 3 A wiring diagram of a low-voltage regulation device applied to a 0.4kV line, provided as an embodiment of the present invention;

[0042] Figure 4 Ladder diagram of the built-in automatic control program of the controller provided in the embodiments of the present invention;

[0043] Figure 5 The built-in automatic control program instruction table of the controller provided in the embodiments of the present invention;

[0044] Figure 6 This is a schematic flowchart of a low-voltage regulation method applied to a 0.4kV line, provided by an embodiment of the present invention.

[0045] In the picture:

[0046] 1 is an energy storage regulation component; 2 is a current metering component; 3 is a circuit breaker switch component; 4 is a surge arrester component; 5 is a transformer; 6 is a fuse; 7 is a load switch component; 8 is a capacitor; 9 is an inverter; 10 is a controller; 11 is a mobile terminal; J1 is a controllable load switch; J2 is a first controllable circuit breaker; J2 is a second controllable circuit breaker; 14 is the power load side; TA11 is a first current metering module; TA12 is a second current metering module; TA13 is a third current metering module. Detailed Implementation

[0047] This invention provides a low-voltage regulation device and method for 0.4kV lines, used to solve the low-voltage problem of 0.4kV lines during peak summer seasons.

[0048] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0049] To address the low voltage problem existing in 0.4kV lines, this invention develops a low-voltage regulation device. It utilizes off-peak electricity to charge and store energy during off-peak hours. When low voltage occurs, the device automatically activates three sets of single-phase inverters, using stored energy to compensate for the voltage and maintain normal power supply. This rapid and automatic voltage regulation solves the problems of short-term heavy overload in distribution areas and low voltage for end-user customers.

[0050] Please see Figures 1-3 The low voltage regulation device for a 0.4kV line provided in this embodiment of the invention includes: a current metering component 2, an energy storage regulation component 1, and a controller 10;

[0051] The current metering component 2 includes a first current metering module TA11, a second current metering module TA12, and a third current metering module TA13;

[0052] One end of the first current metering module TA11 is connected to the transformer 5, and the other end of the first current metering module TA11 is connected to the energy storage regulating component 1, the second current metering module TA12 and the third current metering module TA13 respectively.

[0053] The energy storage regulating component 1 is connected to the second current metering module TA12 and the third current metering module TA13 respectively, and is connected to the electrical load side 14 through the second current metering module TA12 and the third current metering module TA13.

[0054] The controller 10 is connected to the first current metering module TA11, the second current metering module TA12, the third current metering module TA13 and the energy storage regulating component 1 respectively. It is used to receive the first current of the first current metering module TA11, the second current of the second current metering module TA12 and the third current of the third current metering module TA13, and determine the operating state of the power system based on the first current, the second current and the third current. When the operating state is the peak state, the controller adjusts the state of the energy storage regulating component 1 to the discharge state.

[0055] It should be noted that the current metering component 2 is respectively installed on the transformer 5 side and the load side 14, and is used to collect current data on the transformer 5 side and the load side 14, respectively, where the transformer 5 side represents the main grid side. In this embodiment, the current data collected from the transformer side and the load side 14 by current metering provides data support for monitoring the peak and valley status of the power system.

[0056] The current metering component 2 includes a first current metering module TA11, a second current metering module TA12, and a third current metering module TA13. The first current metering module TA11 is located on the transformer side and is used to collect current data from the transformer side, i.e., the first current. The second current metering module TA12 and the third current metering module TA13 are respectively located on the electrical load side 14 and are used to collect current data from the electrical load side 14. The current data collected by the second current metering module TA12 is the second current, and the current data collected by the third current metering module TA13 is the third current.

[0057] It should be noted that the operating state of a power system includes peak-hour and valley-hour states. Peak-hour states refer to the period when electricity load is at its highest. Valley-hour states refer to the period when electricity load is at its lowest. In this embodiment, the controller 10 receives a first current, a second current, and a third current, and determines the operating state of the main power grid based on these currents. When the power system is determined to be in peak-hour state, the energy storage regulating component 1 is adjusted to a discharge state, causing it to discharge and thus providing voltage compensation for the 0.4kV line. This solves the low voltage problem of the 0.4kV line during peak summer demand, thereby improving the power supply quality of the 0.4kV line.

[0058] The lifespan of the energy storage regulating component 1 can be expressed by the number of repeated charge and discharge cycles. In this embodiment, the energy storage regulating component 1 is a new type of green and environmentally friendly device that does not use heavy metals or other harmful substances. It can be charged and discharged 50W to 100W times and has an operating temperature range of -40 to 65 degrees Celsius. It can provide reliable energy for the equipment to operate.

[0059] In this embodiment, the current data of the main grid and the load side 14 during peak and valley periods are detected by the current metering component 2. The controller 10 determines the operating status of the power system based on the current data of the current metering component 2. When the operating status is peak, the controller 10 adjusts the state of the energy storage regulating component 1 to the discharge state, so that the energy storage regulating component 1 releases electrical energy to the main grid to achieve voltage compensation for the 0.4kV line. This solves the low voltage problem of the 0.4kV line during the peak summer season and improves the power supply quality of the 0.4kV line.

[0060] In a specific embodiment, the controller 10 is specifically used to calculate the sum of the second current and the third current to obtain the target load current, and to determine whether the first current is greater than the target load current. If not, the controller determines that the operating state is the peak state and adjusts the state of the energy storage regulating component 1 to the discharge state; if so, the controller determines that the operating state is the valley state and adjusts the state of the energy storage regulating component 1 to the charging state.

[0061] It should be noted that the target load current is equal to the sum of the second and third currents, which represents the total current of the electrical load.

[0062] When the first current is less than the target load current, it indicates that the power generated by the main grid is insufficient to meet the power demand of the load. At this time, the 0.4kV line will experience a low voltage problem. Therefore, the controller 10 adjusts the state of the energy storage regulating component 1 to the discharge state, so that the energy storage regulating component 1 releases power to the main grid to achieve voltage compensation for the 0.4kV line, thereby solving the low voltage problem of the 0.4kV line during peak hours.

[0063] When the first current is greater than the target load current, it indicates that the electrical energy produced by the main grid exceeds the electricity demand of the load, representing that the power system is in a valley state. At this time, the controller 10 adjusts the state of the energy storage regulating component 1 to the charging state, so that the energy storage regulating component 1 stores valley electrical energy, thereby improving the economic efficiency of the device's electricity consumption.

[0064] Therefore, in this embodiment, when the operating state of the power system is in a valley state, the state of the energy storage regulation component 1 is adjusted to a charging state, thereby utilizing the redundant electrical energy during the valley to charge the energy storage regulation component 1, thus improving the economic efficiency of the device.

[0065] In one specific embodiment, the energy storage regulation component 1 includes: three sets of inverter modules connected in parallel;

[0066] Each inverter module includes a controllable load switch J1, a capacitor 8, a first controllable circuit breaker J2, a second controllable circuit breaker J3, and an inverter 9; the controllable load switch J1 is connected to the capacitor 8, the capacitor 8 is connected to the first controllable circuit breaker J2, and the first controllable circuit breaker J2 is connected to the inverter 9; the two ends of the second controllable circuit breaker are respectively connected to the controllable load switch J1 and the inverter 9.

[0067] The controller 10 is connected to the controllable load switch J1, the first controllable circuit breaker J2, and the second controllable circuit breaker, respectively.

[0068] In one specific embodiment, the device further includes a load switch assembly 7 and a circuit breaker switch assembly 3, wherein the load switch assembly 7 includes a first load switch; and the circuit breaker switch assembly 3 includes a first circuit breaker switch and a second circuit breaker switch.

[0069] The first current metering module TA11 and the energy storage regulating component 1 are both connected to the first load switch; the first load switch is connected to the first circuit breaker switch and the second circuit breaker switch respectively.

[0070] The first circuit breaker switch is connected to the second current metering module TA12;

[0071] The second circuit breaker switch is connected to the third current metering module TA13.

[0072] In one specific embodiment, a surge arrester assembly 4 is included; the surge arrester assembly 4 includes a first surge arrester F11;

[0073] The other end of transformer 5 is connected to the first surge arrester F11.

[0074] In one specific embodiment, a fuse 6 is included;

[0075] The other end of transformer 5 is connected to fuse 6.

[0076] In one specific embodiment, the load switch assembly 7 includes a second load switch QL11;

[0077] Fuse 6 is connected to the second load switch QL11.

[0078] In one specific embodiment, the first current metering module TA11, the second current metering module TA12, and the third current metering module TA13 are current transformers.

[0079] In this embodiment, the overall structure of the device is as follows: Figure 1 As shown, one end of the second load switch QL11 is connected to a fuse 6. One side of the fuse 6 is connected to a first surge arrester F11. A copper busbar TMY is also connected to the fuse 6. The other end of the copper busbar TMY is connected to a first current metering module TA11. The other side of the first current metering module TA11 is connected to another copper busbar TMY. The other side of the copper busbar TMY is connected to a first load switch 1QK. The first load switch 1QK is connected to a first circuit breaker switch QF11 and a second circuit breaker switch QF12. The first circuit breaker switch QF11 is connected to the second current metering module TA12. The second circuit breaker switch QF12 is connected to a third current metering module TA13. An energy storage regulating component 1 is connected in parallel to the other side of the first current metering module TA11. The other end of the energy storage regulating component 1 is connected to the first circuit breaker switch QF11. The surge arrester assembly 4 also includes a second surge arrester F21. One end of the second surge arrester F21 is connected to the first current metering module TA11, and the other end is grounded.

[0080] The energy storage regulation component 1 includes three sets of inverter modules connected in parallel. Each set of inverter modules includes a capacitor 8, a controllable load switch J1, a first controllable circuit breaker J2, a second controllable circuit breaker J3, and an inverter 9.

[0081] Among them, the controllable load switch J1 is connected to the capacitor 8, the other end of the capacitor 8 is connected to the second controllable circuit breaker J3, the other end of the second controllable circuit breaker J3 is connected to the inverter 9, the other end of the inverter 9 is connected to the controllable load switch J1 on the load side, and the two ends of the second controllable circuit breaker J3 are respectively connected to the second load switch QL11 on the high-voltage side and the first load switch 1QK on the low-voltage side, and are connected in parallel with the capacitor 8.

[0082] In this embodiment, inverter 9 is used to convert DC power into three-phase AC power consistent with the main grid. The first load switch 1QK disconnects the main circuit current on the load side of this line. The second load switch QL11 disconnects the main circuit current on the high-voltage side. The first circuit breaker switch QF11 disconnects the branch circuit current on the main circuit. The second circuit breaker switch QF12 disconnects the current in another branch circuit on the main circuit.

[0083] In one specific embodiment, the controller 10 includes a first register, a second register, a third register, and a fourth register;

[0084] The first register is connected to the first current metering module TA11 and is used to store the first current.

[0085] The second register is connected to the second current metering module TA12 and is used to store the second current.

[0086] The third register is connected to the third current metering module TA13 and is used to store the third current.

[0087] The fourth register is connected to the first register, the second register, the third register, the controllable load switch J1, the first controllable circuit breaker J2, and the second controllable circuit breaker J3 respectively. It is used to calculate the sum of the second current and the third current to obtain the target load current, and to determine whether the first current is greater than the target load current. If so, the operating state is determined to be the valley state, and a disconnect signal is output to the first controllable circuit breaker J2 and the second controllable circuit breaker J3; otherwise, the operating state is determined to be the peak state, and a disconnect signal is output to the controllable load switch J1.

[0088] It should be noted that in this embodiment, the controller 10 is a programmable logic controller (PLC). The controller 10, the current metering component 2, the controllable load switch J1, the first controllable circuit breaker J2, and the second controllable circuit breaker J3 are all connected to the main grid line, thereby utilizing the power of the main grid to power the device in this embodiment.

[0089] like Figure 3As shown, the first current metering module TA11, the second current metering module TA12, and the third current metering module TA13 are respectively connected to the live wire L and the neutral wire N, and are also connected to the first register D1, the second register D2, and the third register D3 of the controller 10. The controller 10 is also connected to the controllable load switch J1, the first controllable circuit breaker J2, and the second controllable circuit breaker J3.

[0090] The working principle of this embodiment is as follows: After the start contact X3 is triggered, the first current, second current, and third current collected by the first current metering module TA11, the second current metering module TA12, and the third current metering module TA13 are transmitted to the first register D1, the second register D2, and the third register D3 of the controller 10, respectively. Then, the second current in the second register D2 and the third current in the third register D3 are added together to obtain the target load current. The target load current is then stored in the fourth register D4, and the magnitudes of the first current and the target load current are compared. If the first current is greater than the target load current... If the first current is less than or equal to the target load current, output signals Y1 and Y2 to disconnect the first controllable circuit breaker J2 and the second controllable circuit breaker J3, indicating that the system is in a valley and the energy storage device is being charged. If the first current is less than or equal to the target load current, output signal Y3 to the controllable load switch J1 to disconnect the controllable load switch J1, indicating that the system is in a peak period. The capacitor 8 in the energy storage regulating component 1 discharges and the inverter 9 converts the DC power to AC power before connecting it to the load side circuit system to achieve voltage compensation, solve the problem of short-term heavy load and low voltage on the load side, and thus maintain the power quality of the line's normal power supply.

[0091] It is understood that in this embodiment, signal Y1 is used to disconnect the second controllable circuit breaker J3, signal Y2 is used to disconnect the first controllable circuit breaker J2, and signal Y3 is used to disconnect the load switch D1.

[0092] The ladder diagram of the control program in this embodiment is as follows: Figure 4 As shown, the program instruction table corresponding to the ladder diagram is as follows: Figure 5 As shown.

[0093] In one specific embodiment, a communication module is also included;

[0094] The communication module is connected to the controller 10 and the mobile terminal 11 respectively.

[0095] It should be noted that the mobile terminal 11 is wirelessly connected to the controller 10 remotely via a communication module, thereby enabling remote control of the controller 10. In one example, the mobile terminal 11 can remotely control the output of signals Y1, Y2, and Y3. The mobile phone is connected to the programmable controller 10 and can remotely and directly control the output of Y1, Y2, and Y3, thereby controlling the on / off state of the controllable load switch J1, the first controllable circuit breaker J2, and the second controllable circuit breaker J3 to cope with various special emergencies, enhancing the intelligence and reliability of the entire system.

[0096] In one specific embodiment, the mobile terminal 11 may be a mobile phone.

[0097] When this device is applied to the power system, its automated nature can reduce the investment in operating manpower and large compensation equipment, thereby significantly reducing investment costs and achieving high-quality power supply.

[0098] Please see Figure 6 This invention provides a low-voltage regulation method for 0.4kV lines, applicable to the apparatus of any of the above embodiments, the method comprising:

[0099] 101. Receive the first current from the first current metering module, the second current from the second current metering module, and the third current from the third current metering module;

[0100] 102. Based on the first current, the second current and the third current, determine the operating state of the power system. When the operating state is peak state, adjust the state of the energy storage regulating component to discharge state.

[0101] This embodiment receives the first current from the first current metering module, the second current from the second current metering module, and the third current from the third current metering module. Based on the first current, the second current, and the third current, the operating state of the power system is determined. When the operating state is peak time, the state of the energy storage regulation component is adjusted to discharge state, which solves the low voltage problem of the 0.4kV line during peak summer season and improves the power supply quality of the 0.4kV line.

[0102] In one specific embodiment, step 102 specifically includes:

[0103] Calculate the sum of the second current and the third current to obtain the target load current, and determine whether the first current is greater than the target load current. If so, determine that the operating state is the valley state and adjust the state of the energy storage regulating component to the charging state; otherwise, determine that the operating state is the peak state and adjust the state of the energy storage regulating component to the discharging state.

[0104] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0105] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0106] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0107] Furthermore, in the various embodiments of the present invention, the functional units can be integrated into one processing unit, or each functional unit can be a separate physical entity, or two or more functional units can be integrated into one processing unit. The integrated unit described above can be implemented in hardware or as a software functional unit.

[0108] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0109] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0110] It should also be noted that in the description of this invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0111] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A low voltage regulating device for application to 0.4 kV lines, characterized in that, The device includes: a current metering component, an energy storage and regulation component, and a controller; The current metering component includes a first current metering module, a second current metering module, and a third current metering module; One end of the first current metering module is connected to the transformer, and the other end of the first current metering module is connected to the energy storage regulation component, the second current metering module and the third current metering module respectively; The energy storage regulation component is connected to the second current metering module and the third current metering module respectively, and is connected to the power load side through the second current metering module and the third current metering module; The controller is connected to the first current metering module, the second current metering module, the third current metering module, and the energy storage regulation component, respectively. It is used to receive the first current from the first current metering module, the second current from the second current metering module, and the third current from the third current metering module, and to determine the operating state of the power system based on the first current, the second current, and the third current. When the operating state is the peak state, the controller adjusts the state of the energy storage regulation component to the discharge state. The controller is specifically used to calculate the sum of the second current and the third current to obtain the target load current, and to determine whether the first current is greater than the target load current. If not, the controller determines that the operating state is a peak state and adjusts the state of the energy storage regulating component to a discharge state. If so, the controller determines that the operating state is a valley state and adjusts the state of the energy storage regulating component to a charging state. The energy storage regulation component includes: three sets of inverter modules connected in parallel; Each inverter module group includes a controllable load switch, a capacitor, a first controllable circuit breaker, a second controllable circuit breaker, and an inverter; the controllable load switch is connected to the capacitor, the capacitor is connected to the first controllable circuit breaker, and the first controllable circuit breaker is connected to the inverter; the two ends of the second controllable circuit breaker are respectively connected to the controllable load switch and the inverter; The controller is connected to the controllable load switch, the first controllable circuit breaker, and the second controllable circuit breaker, respectively.

2. The apparatus of claim 1, wherein, The controller includes a first register, a second register, a third register, and a fourth register; The first register is connected to the first current metering module and is used to store the first current; The second register is connected to the second current metering module and is used to store the second current; The third register is connected to the third current metering module and is used to store the third current; The fourth register is connected to the first register, the second register, the third register, the controllable load switch, the first controllable circuit breaker, and the second controllable circuit breaker, respectively. It is used to calculate the sum of the second current and the third current to obtain the target load current, and to determine whether the first current is greater than the target load current. If so, the operating state is determined to be a valley state, and a disconnection signal is output to the first controllable circuit breaker and the second controllable circuit breaker; otherwise, the operating state is determined to be a peak state, and a disconnection signal is output to the controllable load switch.

3. The apparatus according to claim 1, characterized in that, The device further includes a load switch assembly and a circuit breaker switch assembly, wherein the load switch assembly includes a first load switch; and the circuit breaker switch assembly includes a first circuit breaker switch and a second circuit breaker switch. The first current metering module and the energy storage regulating component are both connected to the first load switch; the first load switch is connected to the first circuit breaker switch and the second circuit breaker switch respectively; The first circuit breaker switch is connected to the second current metering module; The second circuit breaker switch is connected to the third current metering module.

4. The apparatus according to claim 3, characterized in that, Includes a surge arrester assembly; the surge arrester assembly includes a first surge arrester; The other end of the transformer is connected to the first surge arrester.

5. The apparatus according to claim 4, characterized in that, Including fuses; The other end of the transformer is connected to the fuse.

6. The apparatus according to claim 5, characterized in that, The load switch assembly includes a second load switch; The fuse is connected to the second load switch.

7. The apparatus according to claim 4, characterized in that, It also includes a communication module; The communication module is connected to both the controller and the mobile terminal.

8. A low-voltage regulation method applied to a 0.4kV line, characterized in that, Applied to the apparatus of any one of claims 1-7, the method comprises: Receive the first current from the first current metering module, the second current from the second current metering module, and the third current from the third current metering module; Based on the first current, the second current, and the third current, the operating state of the power system is determined. When the operating state is peak time, the state of the energy storage regulating component is adjusted to discharge state.

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