Power supply metering device and method for power generation vehicle accessing power distribution network

Abstract

This invention discloses a power metering device and method for connecting a generator truck to a power distribution network. The power metering device enclosure is divided into a primary compartment and a secondary compartment. The upper layer of the primary compartment houses a power-side switch and a metering current transformer, used to connect the generator truck's incoming line quick-connect port to the power-side switch via a three-phase incoming line copper busbar. Each phase incoming line copper busbar connects to one metering current transformer. The middle layer houses a status monitoring module, used to monitor the phase sequence and power parameters of the three-phase power supply on the generator truck and load side based on the monitored current transformers, independently displaying the three-phase energized status of the generator truck's incoming line and the load's outgoing line. The lower layer houses a load-side switch, connected to the outgoing line quick-connect port via a three-phase outgoing line copper busbar. The upper layer of the secondary compartment has two sets of terminals for connecting the metering energy meter removed from the power outage area and a data acquisition terminal, and includes a transformer ratio conversion switch connected to a metering current sensor. This invention enables rapid calculation of power supply to power outage areas.

Description

Technical Field

[0001] This invention relates to the field of temporary metering technology for low-voltage distribution lines in the power industry, specifically to a power metering device and method for quickly connecting generator trucks to the distribution network and achieving accurate metering of electrical energy. Background Technology

[0002] To improve power supply reliability and service quality, power grid companies are actively promoting the "zero-outage perception" model. Under this model, mobile generators have become a common auxiliary device for distribution network emergency repairs and planned maintenance. However, traditional mobile generators typically connect to the grid below the low-voltage standby switch on the low-voltage side of a prefabricated substation or the low-voltage switch of a pole-mounted integrated distribution cabinet. The power supplied does not pass through the metering at the distribution area level, which has significant drawbacks: First, power supply statistics are missing, resulting in abnormal line losses in the distribution area, manifesting as negative losses, affecting the company's operation and management; second, the electricity consumption information collection terminal is offline, and user electricity purchase information cannot be sent in a timely manner, requiring maintenance personnel to rewrite electricity cards on-site, wasting manpower and affecting residents' electricity experience. Therefore, developing an integrated metering device that can be quickly connected, accurately metered, and securely isolated to meet the metering and operation and maintenance needs of mobile generators connected to the distribution network is of great significance. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings and defects of the prior art and provide a power metering device and method for connecting a generator vehicle to the power distribution network. It aims to achieve accurate and non-inductive metering of the power supply of the generator vehicle, ensure that the metering energy meter and the data acquisition terminal are continuously online, and stably control the line loss of the distribution area within the target value range. It is particularly suitable for 0.4 kV low-voltage generator vehicle access scenarios with access capacity between 315 kVA and 800 kVA.

[0004] One objective of this invention is to provide a power metering device for connecting a generator vehicle to a power distribution network, comprising a housing, the housing being divided into a primary compartment and a secondary compartment; the upper layer of the primary compartment is equipped with a power supply side switch and a metering current transformer, for connecting the generator vehicle's incoming line quick-plug hole to the power supply side switch via a three-phase incoming line copper busbar; each phase incoming line copper busbar is connected to one metering current transformer; the middle layer is equipped with a status monitoring module, for monitoring the phase sequence and power parameters of the three-phase power supply of the generator vehicle and the load side based on the monitoring current transformer, and independently displaying the three-phase energized status of the generator vehicle's incoming line side and the load's outgoing line side; The lower layer is equipped with a load-side switch, which is connected to the quick-plug hole on the outgoing side via a three-phase outgoing copper busbar. The upper layer of the secondary compartment is equipped with two sets of terminals for connecting the metering energy meters and data acquisition terminals removed from the power outage area, and a transformer ratio conversion switch connected to the metering current sensor. The two sets of terminals are respectively connected to the voltage and current terminals of the energy metering wiring device. The energy metering wiring device is connected to the intermediate connecting copper busbar between the power-side switch and the load-side switch to obtain the three-phase voltage signal, and connected to the transformer ratio conversion switch to obtain the current signal.

[0005] Preferably, there are two load-side switches, which are electrically connected to the power-side switches via a central copper busbar.

[0006] Preferably, the energy meter and the data acquisition terminal are arranged horizontally, and the two communicate with each other via an RS485 communication line and a pulse interface.

[0007] Preferably, the transformer ratio switching switch is equipped with a multi-tap switching mechanism, supporting at least three ratio switching levels to adapt to generator cars of different capacities.

[0008] Preferably, the transformer ratio changeover switch is in three groups, each group corresponding to one phase of the three-phase power supply. Each group of transformer ratio changeover switches has six terminals, which are respectively connected to the secondary side terminals of the current transformer.

[0009] Preferably, the transformer ratio switching switch is connected to the wiring terminals of the metering current transformer via a cable, and each metering current transformer has six wiring terminals on its secondary side, corresponding to three gear switching positions.

[0010] Preferably, the power supply side switch is a universal circuit breaker, and the enclosure is made of SMC composite material with a rectangular structure and an IP54 protection rating.

[0011] Preferably, the quick-plug hole on the outgoing side is used to connect to the backup switch on the low-voltage side of the low-voltage cable branch box, box-type substation, or pole-mounted transformer via the outgoing side flexible cable.

[0012] Preferably, the generator car is connected to the quick-plug hole on the inlet side via a flexible cable on the inlet side.

[0013] Another object of the present invention is to provide a power supply metering method for a generator vehicle connected to a power distribution network, used for power supply metering according to the power supply metering device for the generator vehicle connected to the power distribution network, comprising the following steps:

[0014] The power generation vehicle capacity is determined by retrieving the historical maximum load rate data of the power outage area from the power grid back-end system and overlaying it with a preset margin.

[0015] According to the current transformer ratio parameters of the power outage area, switch the transformer ratio conversion switch to the corresponding position;

[0016] Disassemble the metering energy meter and data acquisition terminal at the stop area metering point and install them onto the two sets of terminals;

[0017] Connect the output end of the generator car to the quick-connect hole on the incoming side via the flexible cable on the incoming side, and at the same time use the quick-connect hole on the outgoing side to connect the flexible cable on the outgoing side to the low-voltage cable branch box, box-type substation or the backup switch on the low-voltage side of the pole transformer.

[0018] After the generator output switch is closed and confirmed by the status monitoring module, the power supply side switch and load side switch are closed in sequence to start supplying power. The metering energy meter and data acquisition terminal at the gate collect metering data in real time and upload it to the main station to realize the monitoring of power supply metering data.

[0019] The power metering device of the present invention can switch the transformer ratio through the transformer ratio conversion switch to adapt to the output current of the generator car and the capacity of the transformer area; by reserving the terminal block, the metering energy meter and data acquisition terminal of the transformer area can be quickly connected to the metering device to achieve data synchronization with the main station; by connecting the power metering device to the generator car and load-side equipment through the quick-plug connector, electrical connection compatibility and mechanical connection stability can be ensured.

[0020] In this application, an adjustable current transformer and reserved terminals are used to achieve accurate metering of the power supply from the generator vehicle; quick-connect plugs and modular design significantly shorten the time for the generator vehicle to connect to the distribution network; non-inductive operation ensures that the metering energy meter and data acquisition terminal are continuously online, saving manpower and material costs and improving user experience; after the power supply metering device is connected to the distribution network, it can ensure that the power supply from the generator vehicle is accurately measured by the meter at the power outage area, and monitor the data of the metering energy meter and data acquisition terminal in real time to ensure that the data is synchronously uploaded to the main station system. Attached Figure Description

[0021] Figure 1 This is a schematic diagram showing the arrangement of the primary and secondary compartments within the power metering device for connecting the generator vehicle to the power distribution network according to the present invention.

[0022] Figure 2 This is a schematic diagram showing the arrangement of the front and rear compartments within the power metering device for connecting the generator vehicle to the power distribution network according to the present invention.

[0023] Figure label:

[0024] 1-Incoming line quick-plug hole, 2-Three-phase incoming line copper busbar, 3-Metering current transformer, 4-Power supply side switch, 5-Monitoring current transformer, 6-Live display, 7-Phase detection module, 8-Power monitoring instrument, 9-Load side switch, 10-Outgoing line quick-plug hole, 11-Protective grounding wire, 12-Metering energy meter, 13-Data acquisition terminal, 14-Terminal, 15-Energy metering wiring device, 16-Transformer ratio conversion switch, 17-Intermediate connection copper busbar, 18-Neutral connection copper busbar, 19-Three-phase outgoing line copper busbar. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0026] See Figure 1 As shown in the exemplary embodiment of this application, the power metering device for connecting the generator vehicle to the power distribution network includes a box, which is divided into a primary compartment and a secondary compartment. The upper layer of the primary compartment is equipped with a power-side switch 4 and a metering current transformer 3, used to connect the generator vehicle's incoming quick-plug hole 1 to the power-side switch 4 via a three-phase incoming copper busbar 2. Each phase incoming copper busbar is connected to one metering current transformer 3. The middle layer is equipped with a status monitoring module, used to monitor the phase sequence and power parameters of the three-phase power supply on the generator vehicle and load side based on the monitoring current transformer 5, and independently display the three-phase energized status of the generator vehicle's incoming line side and the load's outgoing line side. The lower layer is equipped with... The load-side switch 9 is connected to the quick-plug hole 10 on the outgoing side via a three-phase outgoing copper busbar 19. Two sets of terminals 14 are installed on the upper layer of the secondary compartment to connect the metering energy meter 12 removed from the power outage area and the data acquisition terminal 13. A transformer ratio conversion switch 16 connected to the metering current sensor is also provided. The two sets of terminals are respectively connected to the voltage and current terminals of the energy metering wiring device 15. The energy metering wiring device is connected to the intermediate connecting copper busbar 17 between the power-side switch and the load-side switch to obtain the three-phase voltage signal, and to the transformer ratio conversion switch 16 to obtain the current signal.

[0027] In this embodiment, during use, the three-phase power supply of the generator car is electrically connected to the power supply side switch 4 via the three-phase incoming copper busbars. The three-phase incoming copper busbars are spaced apart, and the current transformers mounted on them are bolted to the compartment plate of the housing. The lower end of the power supply side switch 4 is connected to the upper end of the load side switch 9 via the intermediate connecting copper busbar 17. Each phase intermediate connecting copper busbar has a monitoring current transformer 5 mounted on it. The secondary output of the monitoring current transformer 5 provides the power monitoring instrument 8 of the status monitoring module with power operating status information such as voltage, current, and power factor. When undervoltage or overload occurs, the power monitoring instrument 8 can provide real-time feedback on the equipment operating status.

[0028] In this embodiment of the application, the status monitoring module further includes a live display 6 and a phase detection module 7. The power signals of the live display 6 and the phase detection module 7 are both derived from the three-phase incoming copper busbar at the upper port of the power supply side switch and the three-phase outgoing copper busbar at the lower port of the load side switch.

[0029] In some embodiments, the primary compartment and the secondary compartment are physically isolated by a partition with a preset thickness (5 mm) and a dielectric strength ≥20 kV / mm.

[0030] In some embodiments, there are two load-side switches 9, and the two load-side switches 9 are electrically connected to the power-side switch through an intermediate connecting copper busbar 17. The three-phase copper busbars of the intermediate connecting copper busbar are arranged vertically and spaced apart, with a spacing of 30 mm or more.

[0031] In one embodiment, the load-side switch 9 is a plastic-cased residual current operated circuit breaker with two outputs, supporting dual outputs and two independent outgoing lines. Each independent outgoing line is equipped with independent overload, short circuit and leakage protection functions, and the leakage protection threshold and tripping time limit can be adjusted.

[0032] The load-side switch 9 is connected to the outgoing-side quick-connect hole 10 via the three-phase outgoing-side copper busbar 19. The outgoing-side quick-connect hole is matched with the load-side switch and there are two sets. The quick-connect holes in each set are arranged horizontally and are divided into four colors: yellow, green, red and blue. They are matched with the electrical parameters of the standby switch on the low-voltage side of the low-voltage cable branch box, box-type substation or pole-mounted transformer to prevent misconnection. The flexible cell of the standby switch of the equipment connected to the load side has a built-in spring-driven locking mechanism in the plug-in head. The plug-in operation force is ≤50N and the plug-in stroke is 80mm. It is equipped with an IP67 protection level insulating shell.

[0033] In this embodiment of the application, the neutral wire (N) of the three-phase incoming power supply and the neutral wire of the three-phase outgoing power supply are directly connected through the neutral wire connecting copper busbar 18. A protective grounding wire 11, i.e. PE wire, is provided at the bottom of the enclosure and is tightly connected to the enclosure through copper wire.

[0034] In some embodiments, the metering energy meter 12 and the data acquisition terminal 13 (such as a concentrator) are arranged horizontally, and the two interact with each other through an RS485 communication line and a pulse interface. In this application, two sets of terminals are arranged side by side, which are the connection positions of the metering energy meter and the data acquisition terminal at the power outage area. During the connection process, the metering energy meter and the data acquisition terminal at the power outage area are removed and installed at this position, without the need for on-site manual wiring by staff.

[0035] The two terminals (plugs) are connected to the upper voltage and current wiring holes of the lower power metering wiring device (such as a junction box) via connecting wires. The three-phase voltage signals in the power metering wiring device are respectively led from the intermediate connecting copper busbar located between the power supply side switch and the load side switch. Holes are drilled at the intermediate connecting copper busbar and bolts are used for connection. The neutral wire is led from the N phase of the direct connecting copper busbar between the incoming copper busbar and the outgoing copper busbar.

[0036] In this embodiment, the current signal within the electricity metering wiring device is taken from the output terminal of the transformer ratio selection switch 16. In one embodiment, three sets of transformer ratio selection switches 16 are provided, each set corresponding to one phase of the A, B, and C three-phase power supply. Each set of transformer ratio selection switches 16 has six terminals, which are connected to the secondary side terminals of the metering current transformer 3. In some embodiments, the transformer ratio selection switch is connected to the wiring terminals of the metering current transformer via a cable. Each metering current transformer has six wiring terminals on its secondary side, corresponding to three gear selection positions. Specifically, the current transformer (metering CT) is made of epoxy resin with an accuracy of 0.5S class. Each current transformer has six wiring terminals on its secondary side, namely 1S1-1S2 (corresponding to gear 1), 2S1-2S2 (corresponding to gear 2), and 3S1-3S2 (corresponding to gear 3), which are transmitted to the transformer ratio selection switch 16 in the secondary compartment via a 4mm²*6-core cable.

[0037] In some embodiments, the current transformer ratio changeover switch is equipped with a multi-tap switching mechanism, supporting at least three ratio switching levels to adapt to generator vehicles of different capacities. To avoid an open circuit on the secondary side of the current transformer, pre-switching is required before power is supplied. Preferably, the current transformer ratio changeover switch 16 in this application supports three ratio switching levels: 600 / 5, 1000 / 5, and 1200 / 5. During operation, the three sets of current transformer ratio changeover switches need to be switched to their respective levels.

[0038] The switching logic of the transformer ratio selection switch in the secondary compartment of this application is as follows:

[0039] Position 1 (600 / 5): Short-circuit terminals 2S1-2S2 and 3S1-3S2, and connect to the secondary winding 1S1-1S2 of the metering CT. Position 2 (1000 / 5): Short-circuit terminals 1S1-1S2 and 3S1-3S2, and connect to the secondary winding 2S1-2S2 of the metering CT. Position 3 (1200 / 5): Short-circuit terminals 1S1-1S2 and 2S1-2S2, and connect to the secondary winding 3S1-3S2 of the metering CT. During switching, ensure the universal circuit breaker is in the open state, i.e., the no-load switching state.

[0040] In some embodiments, the power supply side switch is a universal circuit breaker. Preferably, the universal circuit breaker has a rated operating voltage of 0.4 kV, a rated current of 1250A, and a breaking capacity of 35kA. It can automatically disconnect the circuit when an overload, short circuit, or undervoltage fault occurs. The enclosure is made of SMC composite material, has a rectangular structure, and has an IP54 protection rating.

[0041] In some embodiments, the quick-plug hole on the outgoing side is used to connect to a backup switch on the low-voltage side of a low-voltage cable branch box, a box-type substation, or a pole-mounted transformer via an outgoing side flexible cable.

[0042] In some embodiments, the generator car is connected to the quick-connect port on the input side via a flexible cable on the input side. In this application, the input side adopts a single-path input method, with the generator car connected to the quick-connect port on the input side of the housing via a flexible cable. Specifically, the output end of the generator car is connected to the quick-connect port on the input side via a flexible cable on the input side. The flexible cable on the input side connected to the output end of the generator car is connected to a corresponding quick-connect head. The quick-connect head matches the quick-connect port, with yellow, green, red, and blue corresponding to each other, and matches the electrical parameters of the generator car interface to prevent misconnection. The quick-connect head has a built-in spring-driven locking mechanism, with an insertion and removal operating force ≤50N and an insertion and removal stroke of 80mm, and is equipped with an IP67 protection-rated insulating shell.

[0043] In some embodiments, epoxy resin insulating baffles are used inside the enclosure to isolate live conductors, with reserved operating windows to ensure that operators only contact non-energized areas. The epoxy resin insulating baffles are made of 3mm thick SMC composite material with an insulation resistance value ≥1000MΩ. A slot-type installation structure achieves complete enclosure of the live copper busbars. This ensures the enclosure meets low-voltage insulation standards, and the use of insulating baffles to isolate live parts reduces safety risks during installation and disassembly.

[0044] like Figure 1As shown, the enclosure of this application includes, in the primary compartment, a quick-connect hole 1 on the incoming line side, a copper busbar on the incoming line side, a metering current transformer 3, a power supply side switch 4, a monitoring current transformer 5, a live indicator 6, a phase detection module 7, a power monitoring instrument 8, a load side switch 9, a quick-connect hole 10 on the outgoing line side, and a protective grounding wire 11; and in the secondary compartment, a component metering energy meter 12, a data acquisition terminal 13, a terminal block 14, an energy metering wiring device 15, and a transformer ratio conversion switch 16.

[0045] Furthermore, the container described in this application can also be divided into a front compartment and a rear compartment. In a structural layout with a front compartment and a rear compartment, such as... Figure 2 As shown, the front and rear compartments are physically isolated by a partition with a dielectric strength ≥20kV / mm and a preset thickness (5mm). Specifically, the front compartment includes a power supply switch 4, a live indicator 6, a phase detection module 7, a power monitoring instrument 8, a load-side switch 9, and a protective grounding wire 11. The secondary compartment includes a metering energy meter 12, a data acquisition terminal 13, a terminal block 14, an energy metering wiring device 15, and a transformer ratio conversion switch 16. The rear compartment includes an incoming line quick-connect hole 1, an incoming line copper busbar 2, a metering current transformer 3, a monitoring current transformer 5, and an outgoing line quick-connect hole 10. Figure 2 In the middle, the lower port of the power supply side switch 4 is converted to the rear compartment via the intermediate connecting copper busbar. The three-phase copper busbars are arranged vertically with a spacing of greater than or equal to 30 mm, and then converted to the upper port of the load side switch 9 in the front compartment.

[0046] This application further provides a power supply metering method for a generator vehicle connected to a power distribution network, used to perform power supply metering based on the power supply metering device for the generator vehicle connected to the power distribution network, including the following steps:

[0047] S1. Retrieve the historical maximum load rate data of the power outage area through the power grid back-end system and add a preset margin to determine the generator capacity;

[0048] S2. Based on the current transformer ratio parameters of the power outage area, switch the transformer ratio conversion switch to the corresponding position;

[0049] S3. Disassemble the metering energy meter and data acquisition terminal at the stop area metering point and install them on the two sets of terminals;

[0050] S4. Connect the output end of the generator car to the quick-connect hole on the incoming side via the flexible cable on the incoming side, and at the same time use the quick-connect hole on the outgoing side to connect the flexible cable on the outgoing side to the standby switch on the low-voltage side of the low-voltage side of the low-voltage side of the box-type substation or the pole transformer.

[0051] S5. Close the generator output switch. After the status monitoring module confirms the status, close the power supply side switch and the load side switch in sequence to start supplying power. The metering energy meter and the data acquisition terminal at the gate collect metering data in real time and upload it to the main station to realize the monitoring of power supply metering data.

[0052] The device of the present invention is used for temporary emergency repairs, especially for situations where power outages occur in public transformer substations (including box-type substations or pole-mounted integrated distribution cabinets) due to emergencies such as 10kV line cable faults, requiring rapid connection to a generator truck for temporary power supply.

[0053] It should be noted that the temporary emergency repair scenario in this application is limited by the main station data synchronization mechanism, and step S3 needs to use the original gate metering equipment; in the planned maintenance scenario, by optimizing the main station system and adding gate metering equipment, the generator car can be connected and metered quickly without contact under the same access conditions, highlighting the multi-scenario adaptability of this device.

[0054] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention.

[0055] Therefore, the embodiments should be regarded as exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of the equivalents of the claims be included within the invention.

[0056] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A power metering device for connecting a generator vehicle to a power distribution network, characterized in that, The enclosure includes a primary compartment and a secondary compartment. The upper layer of the primary compartment houses the power supply side switch and metering current transformers, used to connect the generator car's incoming line quick-connect port to the power supply side switch via a three-phase incoming line copper busbar. Each phase incoming line copper busbar is connected to one metering current transformer. The middle layer houses a status monitoring module, used to monitor the phase sequence and power parameters of the three-phase power supply on the generator car and load side based on the monitored current transformers, and independently display the three-phase energized status of the generator car's incoming line and the load's outgoing line. The lower layer houses the load side switch. The side-opening copper busbar connects to the quick-plug hole on the outgoing side; two sets of terminals are installed on the upper layer of the secondary compartment for connecting the metering energy meter and data acquisition terminal removed from the power outage area, and a transformer ratio conversion switch connected to the metering current sensor is also provided; the two sets of terminals are respectively connected to the voltage and current terminals of the energy metering wiring device, and the intermediate connecting copper busbar between the energy metering wiring device and the power supply side switch and the load side switch is connected to obtain the three-phase voltage signal, and connected to the transformer ratio conversion switch to obtain the current signal.

2. The power supply metering device for connecting a generator vehicle to a power distribution network according to claim 1, characterized in that, There are two load-side switches, which are electrically connected to the power-side switches via a central copper busbar.

3. The power metering device for connecting a generator vehicle to a power distribution network according to claim 1, characterized in that, The energy meter and the data acquisition terminal are arranged horizontally, and the two communicate with each other via an RS485 communication line and a pulse interface.

4. The power supply metering device for connecting a generator vehicle to a power distribution network according to claim 1, characterized in that, The transformer ratio switching switch is equipped with a multi-tap switching mechanism, supporting at least three ratio switching levels to adapt to generator cars of different capacities.

5. The power supply metering device for connecting a generator vehicle to a power distribution network according to claim 1, characterized in that, The transformer ratio switching switch is connected to the wiring terminals of the metering current transformer via a cable. Each metering current transformer has six wiring terminals on its secondary side, corresponding to three gear switching positions.

6. The power supply metering device for connecting a generator vehicle to a power distribution network according to claim 1, characterized in that, The transformer ratio changeover switch consists of three sets, each corresponding to one phase of the three-phase power supply. Each set of transformer ratio changeover switches has six terminals, which are connected to the secondary side terminals of the metering current transformer.

7. The power supply metering device for connecting a generator vehicle to a power distribution network according to claim 1, characterized in that, The power supply side switch is a universal circuit breaker, and the enclosure is made of SMC composite material with a rectangular structure and an IP54 protection rating.

8. The power supply metering device for connecting a generator vehicle to a power distribution network according to claim 1, characterized in that, The quick-connect hole on the outgoing side is used to connect to the backup switch on the low-voltage side of the low-voltage cable branch box, box-type substation, or pole-mounted transformer via the outgoing side flexible cable.

9. The power supply metering device for connecting a generator vehicle to a power distribution network according to claim 1, characterized in that, The generator car is connected to the quick-plug hole on the incoming side via a flexible cable on the incoming side.

10. A method for metering power supply of a generator vehicle connected to a power distribution network, used for metering power supply of the generator vehicle connected to a power distribution network according to claims 1-9, comprising the following steps: The power generation vehicle capacity is determined by retrieving the historical maximum load rate data of the power outage area from the power grid back-end system and overlaying it with a preset margin. According to the current transformer ratio parameters of the power outage area, switch the transformer ratio conversion switch to the corresponding position; Disassemble the metering energy meter and data acquisition terminal at the stop area metering point and install them onto the two sets of terminals; Connect the output end of the generator car to the quick-connect hole on the incoming side via the flexible cable on the incoming side, and at the same time use the quick-connect hole on the outgoing side to connect the flexible cable on the outgoing side to the low-voltage cable branch box, box-type substation or the backup switch on the low-voltage side of the pole transformer. After the generator output switch is closed and confirmed by the status monitoring module, the power supply side switch and load side switch are closed in sequence to start supplying power. The metering energy meter and data acquisition terminal at the gate collect metering data in real time and upload it to the main station to realize the monitoring of power supply metering data.

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