An intelligent control three-phase power supply balancing energy meter and system

Abstract

The present invention relates to the field of power supply balance, and in particular to an intelligently controlled three-phase power supply balance electric energy meter and system. The intelligently controlled three-phase power supply balance electric energy meter provided by an embodiment of the present invention includes an access unit, an automatic control unit, an output unit, a communication unit, and a storage unit. The intelligently controlled three-phase power supply balance electric energy meter provided by the present invention utilizes an access unit to access the three-phase load output by a distribution transformer in the power grid. After the automatic control unit controls the output of the corresponding phase load according to the instructions of the driving component, the output unit outputs the corresponding phase load. Starting from the end of electricity consumption, load control means are used to adjust the actual switching of the three phases to achieve dynamic balance of the three-phase load, which can effectively reduce power grid losses and achieve energy saving and efficiency improvement.

Description

Technical Field

[0001] The present invention relates to the field of power supply balancing, and in particular to an intelligently controlled three-phase power supply balancing electric energy meter and system. Background Art

[0002] In my country's low-voltage, three-phase, four-wire residential power supply system, unbalanced transformer loads are common. Manual load adjustments cannot guarantee long-term three-phase balance, resulting in long-term current in the neutral line, consuming significant energy and causing persistent technical line losses. Furthermore, the long-term presence of unbalanced three-phase loads significantly impacts the transformer's service life and power supply quality.

[0003] At present, the main practices at home and abroad, such as phase-changing switches, high-power shut-off power electronic switch technology, power electronic three-phase unbalanced regulation devices, phase-to-phase reactive power compensation devices, etc., have not achieved ideal application effects after practice. Summary of the Invention

[0004] In view of this, the present invention provides an intelligently controlled three-phase power supply balancing electric energy meter and system, which solves or improves the technical problem of electric energy waste caused by the long-term existence of three-phase load imbalance in the prior art.

[0005] In order to make the objectives, technical means and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings.

[0006] According to one aspect of the present invention, an embodiment of the present invention provides an intelligently controlled three-phase power supply balancing electric energy meter, comprising: an access unit for accessing a load output by a distribution transformer; an automatic control unit electrically connected to the access unit, for controlling the load output by the electric energy meter according to instructions from a driving component; an output unit electrically connected to an output end of the automatic control unit, for outputting the load to a user; a communication unit communicatively connected to the automatic control unit, for receiving instructions from the driving component; and a storage unit for storing operation instructions.

[0007] In one embodiment of the present invention, the automatic control unit includes: an interphase contactor, the input end of the interphase contactor is electrically connected to the access unit, the output end of the interphase contactor is electrically connected to the output unit, the interphase contactor includes three contacts, and the three contacts are respectively used for switching the three phases; a thyristor, the anode of the thyristor is connected to the contact of the interphase contactor, and the cathode of the thyristor is electrically connected to the main circuit of the output unit.

[0008] In one embodiment of the present invention, the intelligent control three-phase power supply balancing electric energy meter further includes: a measuring unit, which is connected in series with the thyristor and is used to monitor the current of the thyristor.

[0009] In one embodiment of the present invention, the measuring unit includes a current transformer.

[0010] In one embodiment of the present invention, the communication unit includes: a signal receiving unit, which is communicatively connected to the driving component and is used to receive the output instruction transmitted by the driving component; an instruction output unit, which is communicatively connected to the automatic control unit and is used to transmit the output instruction to the automatic control unit.

[0011] In one embodiment of the present invention, the intelligent control three-phase power supply balancing energy meter also includes: a factory reset module, the factory reset module is electrically connected to the access unit, and the factory reset module is used to disconnect the intelligent control three-phase power supply balancing energy meter from the power grid; an initial reset module, the initial reset module is electrically connected to the output unit, and the initial reset module is used to connect the output unit to the default phase.

[0012] In one embodiment of the present invention, the access unit includes a four-core cable, which is used to provide optional power phases and neutral lines; the output unit includes a two-strand cable, which is used to provide the user with the load phases and neutral lines after the electric energy meter is switched on and off.

[0013] In one embodiment of the present invention, the interface between the four-core cable and the output line of the distribution transformer, and the interface between the two-strand cable and the user input line are both covered with an insulation layer.

[0014] In one embodiment of the present invention, the electric energy meter further includes a shielding layer.

[0015] According to the second aspect of the present invention, an embodiment of the present invention provides an intelligent control three-phase power supply balancing system, which includes: a driving component, the driving component includes a user's power consumption model library, and the driving component is used to control the output of three-phase electricity; an intelligent control three-phase power supply balancing energy meter as described in any of the above items, the intelligent control three-phase power supply balancing energy meter is communicatively connected to the driving component; and a power supply support component, the power supply support component is electrically connected to the intelligent control three-phase power supply balancing energy meter and the user end, and the power supply support component is used to provide each line connector.

[0016] The intelligently controlled three-phase power supply balancing energy meter provided in an embodiment of the present invention includes an access unit, an automatic control unit, an output unit, a communication unit, and a storage unit. The intelligently controlled three-phase power supply balancing energy meter provided by the present invention utilizes the access unit to access the three-phase load output by the distribution transformer in the power grid. After the automatic control unit controls the output of the corresponding phase load according to the instructions of the driving component, the output unit outputs the corresponding phase load. Starting from the end user, load control means are used to adjust the actual switching of the three phases to achieve dynamic balance of the three-phase load, which can effectively reduce power grid losses and achieve energy conservation and efficiency improvement. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The figure shows a schematic structural diagram of an intelligently controlled three-phase power supply balancing electric energy meter provided by one embodiment of the present invention.

[0018] Figure 2 This is a statistical chart of simulation test results of an intelligently controlled three-phase power supply balancing electric energy meter provided in another embodiment of the present invention.

[0019] Figure 3 This is a structural diagram of a communication unit in an intelligently controlled three-phase power supply balancing electric energy meter provided by another embodiment of the present invention.

[0020] Figure 4 The present invention provides a schematic structural diagram of an intelligently controlled three-phase power supply balancing electric energy meter according to an embodiment of the present invention.

[0021] Figure 5 The figure shows a structural diagram of an intelligently controlled three-phase power supply balancing electric energy meter provided by one embodiment of the present invention.

[0022] Figure 6 FIG2 is a schematic structural diagram of an intelligent control three-phase power supply balancing system provided by another embodiment of the present invention.

[0023] Figure 7 FIG2 is a schematic structural diagram of an intelligent control three-phase power supply balancing system provided by another embodiment of the present invention.

[0024] Explanation of the accompanying symbols: 1. Access unit; 2. Automatic control unit; 3. Output unit; 4. Communication unit; 41. Signal receiving unit; 42. Command output unit; 5. Storage unit; 6. Transformer; 7. Factory reset module; 8. Initial reset module; 9. Emergency start-up and power restoration module; 10. Driving component; 11. Power supply support component. DETAILED DESCRIPTION

[0025] In the description of the present invention, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise clearly and specifically limited. In the embodiment of the present invention, all directional indications (such as up, down, left, right, front, back, top, bottom ...) are only used to explain the relative position relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the steps or units listed, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices.

[0026] Additionally, references to "embodiments" herein mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present invention. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0027] The present invention provides an intelligently controlled three-phase power supply balancing energy meter, comprising an access unit 1, an automatic control unit 2, an output unit 3, a communication unit 4, and a storage unit 5. The intelligently controlled three-phase power supply balancing energy meter provided by the present invention utilizes the access unit 1 to access the three-phase load outputted by a distribution transformer 6 in the power grid. After the automatic control unit 2 controls the output of the corresponding phase load according to the instructions of the drive component 10, the output unit 3 outputs the corresponding phase load. Starting from the end user, load control measures are used to adjust the actual switching of the three phases to achieve dynamic balancing of the three-phase load, effectively reducing power grid losses and achieving energy conservation and efficiency improvement. The intelligent control three-phase power supply balancing system provided by the present application includes a drive component 10, the above-mentioned electric energy meter and a power supply support component. The drive component 10 controls the three-phase power supply balance of the electric energy meter, accurately counts the power load measured by the specific power metering device, and performs edge computing analysis on the user's potential load demand. The user's power consumption habits are memorized through terminal storage, matched with power-consuming equipment, and a user's power consumption model library is established. By superimposing "first-level cloud control" and "second-level cloud control", a "normal power consumption model" is formed to provide data support for system control. The three-phase load distribution technology is rationally allocated through cloud data statistics and edge computing results. Based on the principle of the minimum phase switching algorithm for stable operation, the design concept of the three-phase balance algorithm is maintained. An edge computing module that can communicate with the substation master meter sensor is built in to seamlessly switch its load between the three groups of phases, and dynamically allocate the household load to the three phases of transformer 6, so that the load carried by each phase of transformer 6 remains constant.

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0029] Figure 1 The figure shows a schematic diagram of the structure of an intelligent control three-phase power supply balance energy meter provided by an embodiment of the present invention. Figure 1 As shown, the intelligent control three-phase power supply balancing energy meter (hereinafter referred to as "energy meter") is the core component of intelligent phase adjustment, responsible for the dynamic adjustment of the load of the entire system. Specifically, it may include: an access unit 1, an automatic control unit 2, an output unit 3, a communication unit 4 and a storage unit 5. Among them, the access unit 1 is electrically connected to the distribution transformer 6 of the power grid for accessing the power grid output load of the phase adjustment system; the automatic control unit 2 is electrically connected to the access unit 1 for controlling the user to use the corresponding phase load according to the instruction of the drive component 10, that is, controlling the phase to select a phase to provide load for the user; the output unit 3 is electrically connected to the output end of the automatic control unit 2 for outputting the load to the user; the communication unit 4 is communicatively connected to the automatic control unit 2 for receiving the instruction of the drive component 10, mainly responsible for receiving the cloud control signal and controlling the operation structure module so that the automatic control unit 2 executes the stored operation instructions based on the user's normal power consumption model; the storage unit 5 is used to store the operation instructions and operation results, etc., so that the control process is controllable and traceable.

[0030] The intelligent control three-phase power supply balancing energy meter provided by the present invention utilizes the access unit 1 to access the three-phase load output by the distribution transformer 6 in the power grid. After the automatic control unit 2 controls the output of the corresponding phase load according to the instruction of the driving component 10, the output unit 3 outputs the corresponding phase load. Starting from the end of electricity consumption, the load control method is used to adjust the actual switching of the three phases to achieve dynamic balance of the three-phase load, which can effectively reduce the loss of the power grid and achieve energy saving and efficiency improvement.

[0031] In one possible implementation, the automatic control module of the electric energy meter may further include an interphase contactor and a thyristor. The input end of the interphase contactor is electrically connected to the access unit 1, and the output end of the interphase contactor is electrically connected to the output unit 3. The interphase contactor includes three contacts, each of which is used to switch the three phases. The anode of the thyristor is connected to the contact of the interphase contactor, and the cathode of the thyristor is electrically connected to the main circuit of the output unit 3. Specifically, to ensure reliability, thyristors are preferably unidirectional thyristors. Unidirectional thyristors are used as contacts of the interphase contactor, mainly in the form of contacts connected in parallel with unidirectional thyristors to implement the switching operation of a certain phase. When the thyristors are operating, the single-chip microcomputer system immediately begins sampling the control voltage. When the voltage reaches the response voltage for the interphase contactor to close, the phase sequence detection circuit determines the phase sequence of the provided voltage, triggering the main circuit thyristors of output unit 3 to connect the interphase contactor coils in a timely manner, ensuring that the interphase contactor contacts complete the closing action within the thyristor's conduction area, thereby eliminating arcing caused by the physical displacement of the contacts during the closing process. Once the operation is completed, the thyristors close, and the current is transferred to the corner terminals. While the relevant phases are continuously conducting, the low-voltage circuit maintains the holding energy, achieving complete energy-saving and silent operation of the entire circuit. At the same time, the circuit monitors the microcurrent passing through the thyristors in real time, which is sufficient to ensure the normal completion of the unidirectional thyristor control on and off operation.

[0032] Figure 2 This is a statistical diagram of simulation test results of an intelligently controlled three-phase power supply balancing electric energy meter provided by another embodiment of the present invention. Figure 2 As shown in the figure, the test data were obtained through simulation experiments. The response time of the electric energy meter basically does not exceed 0.02 seconds, which is at the same frequency as the industrial frequency AC power, effectively improving the effects of "arc-free switching" and "seamless switching".

[0033] Specifically, in one embodiment of the present application, the electric energy meter may further include a measuring unit connected in series with the thyristor, and the measuring unit is used to monitor the current of the thyristor and ensure that there is no abnormality in the three-phase regulation process by measuring the current passing through the thyristor.

[0034] Optionally, the above-mentioned measuring unit is preferably a current transformer. When the current transformer measures the thyristor current passing through normally, the single-chip computer system immediately samples the control voltage and performs subsequent phase modulation operations.

[0035] In another possible implementation, Figure 3 This is a structural diagram of a communication unit in an intelligently controlled three-phase power supply balancing electric energy meter provided by another embodiment of the present invention. Figure 3As shown, the communication unit 4 may include a signal receiving unit and a command output unit 42. The signal receiving unit 41 is communicatively connected to the drive component 10 and is used to receive output commands transmitted by the drive component 10. The command output unit 42 is communicatively connected to the automatic control unit 2 and is used to transmit output commands to the automatic control unit 2. Furthermore, both the signal receiving unit 41 and the command output unit 42 are communicatively connected to a storage unit 5, which stores the output commands received by the signal receiving unit 41 and output by the command output unit 42 in real time. The signal receiving unit 41 may be implemented by a DTE (Data Terminal Equipment, which is an end device or end system in a data communication system) and a DCE (Data Circuit-terminating Equipment, which typically refers to a modem, multiplexer, or digital device. The DCE provides a clock for the DTE, enabling the DTE to operate). The energy meter integrates the DTE / DCE, and transmits data with the cloud controller via the V and X interfaces defined by CCITT (Committee for International Telegraph and Telephone). The result is stored in the storage unit 5 and the automatic control unit 2 is driven by outputting instructions.

[0036] Specifically, in another embodiment of the present application, Figure 4 This is a schematic diagram of the structure of an intelligent three-phase power supply balance energy meter provided by one embodiment of the present invention. Figure 4 As shown, this electricity meter may also include a factory reset module 7 and an initial state reset module 8. The factory reset module 7 is electrically connected to the access unit 1 and is used to disconnect the electricity meter from the power grid. The initial state reset module 8 is electrically connected to the output unit 3 and is used to connect the output unit 3 to the default phase. The factory reset module 7 and the initial state reset module 8 are used to promptly reset the electricity meter when an unavoidable event occurs in the system, ensuring the safety of electricity use for users. The factory reset module 7 sets the electricity meter to a fully three-phase disconnected state at factory. Upon implementation, the abnormal electricity meter can be disconnected from the distribution network and the user's load can be disconnected from the main grid. The reset state of the initial state reset module 8 refers to the subsequent pre-assignment of phases based on the user's initial load, which serves as the basis for resetting the loaded load phase. Upon implementation, the initial loaded load phase can be activated. These two reset states provide terminal safety protection technology for the "three-two meter". In addition, the protection level of the factory reset is higher than that of the initial state reset.

[0037] Further, such as Figure 4 As shown, the energy meter can also include an emergency power restoration module 9 for providing power in an emergency. After the factory reset protection function is activated, the emergency power restoration module 9 can be manually operated to temporarily switch the energy meter to single-phase operation. It should be noted that in this case, the energy meter loses its automatic switching function and operates completely manually, supplying only emergency loads.

[0038] In one possible implementation, Figure 5 This is a schematic diagram of the structure of an intelligent three-phase power supply balance energy meter provided by one embodiment of the present invention. Figure 5 As shown, the meter's access unit 1 can include a four-core cable, which provides selectable power phases and a neutral line. The output unit 3 can include a two-strand cable, which provides the user with the selected load phases and neutral line after the meter is switched on and off. Structurally, both cables consist of a main conductor, an insulation layer, and an armored protective layer. To enhance connection reliability, a special screw-type fastening structure is used at the interface between the cable and the meter to ensure good contact.

[0039] Specifically, in one embodiment of the present application, Figure 5 As shown, the interfaces between the four-core cable and the output circuit of the distribution transformer 6, and between the two-strand cable and the user input circuit, are both covered with a 5mm PVC insulation layer. This insulation layer reduces the probability of leakage and electric shock from the energy meter, eliminating dangerous points and potential hazards, and ensuring safety.

[0040] Optionally, each functional module of the electric energy meter is provided with a shielding layer, which can reduce electromagnetic interference and enhance the reliability of independent operation.

[0041] Next, combine Figure 6 Another aspect of the present application is described. Figure 6 FIG. 1 is a schematic diagram showing the structure of an intelligent control three-phase power supply balancing system provided by another embodiment of the present invention. Figure 6 As shown, the present application also provides an intelligent control three-phase power supply balancing system, which specifically includes a drive component 10, the above-mentioned electric energy meter, and a power supply support component 11. Among them, the drive component 10 is used to perform phase-adjusted output control of three-phase power, and is communicatively connected to the electric energy meter. The power supply support component 11 is electrically connected to the electric energy meter and the user end, and is used to provide various line connections.

[0042] The intelligent control three-phase power supply balancing system provided by the present application includes a drive component 10, the above-mentioned electric energy meter and a power supply support component. The drive component 10 controls the three-phase power supply balance of the electric energy meter, accurately counts the power load measured by the specific power metering device, and performs edge computing analysis on the user's potential load demand. The user's power consumption habits are memorized through terminal storage, matched with power-consuming equipment, and a user's power consumption model library is established. By superimposing "first-level cloud control" and "second-level cloud control", a "normal power consumption model" is formed to provide data support for system control. The three-phase load distribution technology is rationally allocated through cloud data statistics and edge computing results. Based on the principle of the minimum phase switching algorithm for stable operation, the design concept of the three-phase balance algorithm is maintained. An edge computing module that can communicate with the substation master meter sensor is built in to seamlessly switch its load between the three groups of phases, and dynamically allocate the household load to the three phases of transformer 6, so that the load carried by each phase of transformer 6 remains constant.

[0043] Optional, Figure 7 FIG. 1 is a schematic diagram showing the structure of an intelligent control three-phase power supply balancing system provided by another embodiment of the present invention. Figure 6 and Figure 7 As shown, the driving component 10 is the triggering original component for completing the three-phase load regulation, and the system regulation is completed by the driving component 10 to start the load phase switching. The driving component 10 mainly refers to the "first and second level cloud control" (system analysis and control process) and the later "system" implements control according to the "user normal model". The main basis is based on the analysis of the load in the whole day time period, and the focus is on the stability of each phase load in the time series. The overall function is realized by the "first level cloud control" plus "second level cloud control" combined with the algorithm to give the results and form instructions, which are transmitted to the switching module in the electric energy meter, and finally form an instruction queue to complete the switching operation of all electric energy meters in the distribution network. Specifically refers to the adjustment control function to ensure the three-phase load balance of transformer 6. As Figure 7 The figure shows the overall structure after the energy meter is connected. It primarily calculates the total load from n1 to n7 and drives each meter to switch to its corresponding phase. Once the "normal power consumption model" is established, it gradually transitions to "system" control (instruction queues or databases), with "primary cloud control" and "secondary cloud control" providing important control references.

[0044] Specifically, such as Figure 6 As shown, the power supply support component 11 is primarily used to complete the access and output of various interfaces, specifically the distribution line and supporting line branch connectors between the low-voltage side of transformer 6 and the access terminal of the energy meter. The power supply support component 11 specifically includes the main power supply cable and line branch connectors (main line branch connector, branch line branch connector, and household branch connector), and is mainly used to realize the power distribution function of transformer 6.

[0045] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An intelligent three-phase power supply balancing energy meter, characterized in that: include: An access unit (1) for accessing a load output by a distribution transformer (6); An automatic control unit (2), the automatic control unit (2) being electrically connected to the access unit (1) and configured to control the load output by the electric energy meter according to instructions from a driving component; an output unit (3), the output unit (3) being electrically connected to an output end of the automatic control unit (2), the output unit (3) being used to output a load to a user; a communication unit (4), the communication unit (4) being communicatively connected to the automatic control unit (2) and configured to receive instructions from the driving component; as well as A storage unit (5), used for storing operation instructions; A factory reset module (7), the factory reset module (7) being electrically connected to the access unit (1), the factory reset module 7 setting the factory configuration of the electric energy meter to a three-phase fully disconnected state, the factory reset module (7) being used to disconnect the intelligently controlled three-phase power supply balancing electric energy meter from the power grid; An initial state reset module (8), the initial state reset module (8) being electrically connected to the output unit (3), and the initial state reset module (8) being used to connect the output unit (3) to a default phase; The protection level of the factory reset module is greater than the protection level of the initial reset module.

2. The intelligent control three-phase power supply balancing electric energy meter according to claim 1 is characterized in that: The automatic control unit (2) comprises: An interphase contactor, wherein the input end of the interphase contactor is electrically connected to the access unit (1), the output end of the interphase contactor is electrically connected to the output unit (3), and the interphase contactor comprises three contacts, and the three contacts are respectively used for switching three phases; A thyristor, wherein the anode of the thyristor is connected to the contact of the interphase contactor, and the cathode of the thyristor is electrically connected to the main circuit of the output unit (3).

3. The intelligent control three-phase power supply balancing electric energy meter according to claim 2 is characterized in that: Also includes: A measuring unit is connected in series with the thyristor and is used to monitor the current of the thyristor.

4. The intelligent control three-phase power supply balancing electric energy meter according to claim 3 is characterized in that: The measuring unit includes a current transformer.

5. The intelligent control three-phase power supply balancing electric energy meter according to claim 1 is characterized in that: The communication unit (4) comprises: a signal receiving unit, the signal receiving unit being communicatively connected to the driving component and configured to receive an output instruction transmitted by the driving component; An instruction output unit is connected to the automatic control unit (2) for communication, and is used for transmitting the output instruction to the automatic control unit (2).

6. The intelligent control three-phase power supply balancing electric energy meter according to claim 1, characterized in that: The access unit (1) includes a four-core cable, which is used to provide optional power phases and neutral lines; the output unit (3) includes a two-strand cable, which is used to provide the user with the load phase and neutral line after the electric energy meter is switched on and off.

7. The intelligent control three-phase power supply balancing electric energy meter according to claim 6, characterized in that: The interface between the four-core cable and the output line of the distribution transformer (6), and the interface between the two-strand cable and the user input line are both covered with an insulation layer.

8. The intelligent control three-phase power supply balancing electric energy meter according to claim 1, characterized in that: The electric energy meter also includes a shielding layer.

9. An intelligent control three-phase power supply balancing system, characterized in that: include: A driving component, comprising a user's electricity usage model library, and configured to control the output of three-phase electricity; The intelligent control three-phase power supply balancing electric energy meter according to any one of claims 1 to 8, wherein the intelligent control three-phase power supply balancing electric energy meter is communicatively connected to the driving component; and A power supply support component is electrically connected to the intelligently controlled three-phase power supply balancing energy meter and the user end, and is used to provide various line connectors.

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