A pick-up power supply vehicle and a grid-connected system thereof

Abstract

The application provides a pickup power supply vehicle and a grid-connected system thereof, comprising a pickup chassis, a carriage and a generator set, adopts a split water tank type diesel generator set, the overall structure is simple, and the engine is wrapped in the whole carriage, so that more space is provided for noise reduction, so that the noise is lower; meanwhile, the split water tank reduces the length and height size of the diesel generator set, and a larger power generator set can be placed in the same space; the application can reduce the total mass of the vehicle through lightweight design of the carriage, can control the noise of the whole vehicle at 76db (1m) through sound absorption and isolation carriage + impedance composite type noise reduction design, and can reduce the influence on the surrounding residents to the minimum when power is supplied, and does not affect the daily life of residents.

Description

Technical Field

[0001] This invention relates to the field of special emergency power supply vehicles, and in particular to a pickup truck power supply vehicle and its grid connection system. Background Technology

[0002] With the continuous advancement of technology, the replacement of power distribution equipment and emergency repairs in older residential communities have gradually become a routine practice. In this process, mobile power supply vehicles play a crucial role in key aspects such as uninterrupted equipment replacement and emergency repairs during power outages.

[0003] However, the actual conditions in older residential areas present numerous challenges to the operation of mobile power supply vehicles. Because the alleys in these areas are typically narrow and densely populated, conventional mobile power supply vehicles, due to their large size, struggle to navigate smoothly. Furthermore, the electrical distribution rooms in buildings and hotels are mostly located in basements, where height restrictions generally do not exceed 2.2 meters, making it impossible for conventional vehicles to access them. To perform power supply maintenance or emergency repairs, long cables often need to be laid to reach the affected areas. This situation undoubtedly causes significant inconvenience to power supply operations in older urban areas and important locations such as buildings.

[0004] To address the aforementioned issues, pickup truck power supply vehicles, characterized by their small size, low height, and high power density, have emerged. This new type of power supply vehicle has solved some of the problems to a certain extent. However, existing pickup truck power supply vehicles typically install the generator in the rear bed of the pickup truck, resulting in excessive noise during operation, making it difficult to meet the low noise requirement of less than 76dB in residential areas. Furthermore, existing pickup truck power supply vehicles use conventional integrated diesel generator sets, which are bulky, have low space utilization, and relatively low power output; and the weight of the truck bed and generator set is also excessive, exceeding the registration limits.

[0005] For example, patent CN115962047A, entitled "A High Power Density Micro Generator Vehicle and a Power Generation Control Method," adopts a multi-stage rectifier-inverter structure, resulting in a complex system, a high failure rate, limited noise reduction space, and relatively high noise levels. Patent CN120127819A, entitled "A Pickup Power Vehicle with Coordinated Power Generation for Upper and Lower Vehicles and its Power Generation Control Method," uses a chassis engine for coordinated power generation, resulting in poor heat dissipation, high noise, and a long control link. Patent CN205468722U, entitled "A Pickup Power Vehicle," uses an integrated diesel generator set, which has low space utilization and relatively low power generation capacity for the same vehicle body volume. Summary of the Invention

[0006] The purpose of this invention is to provide a pickup truck power supply vehicle and its grid connection system to solve the above-mentioned technical problems.

[0007] The present invention adopts the following technical solution: a pickup truck power supply vehicle, comprising a pickup truck chassis, a cargo box, and a generator set. The cargo box is a lightweight, noise-reducing cargo box, divided into a front water tank heat dissipation area and a rear generator set heat radiation area, with a partition between the two parts. The water tank heat dissipation area is equipped with a water tank and an auxiliary fuel tank. The generator set is a high-power-density generator set, fixedly installed in the generator set heat radiation area, and adopts an aluminum alloy body and a composite material shell. A control cabinet is provided in the cargo box, which contains a control system. A muffler is provided on the top of the generator set heat radiation area, and the muffler is a composite design of a resistive muffler and a reactive muffler.

[0008] Preferably, the water tank heat dissipation area adopts a negative pressure exhaust design, with a side air inlet on the side of the water tank heat dissipation area, a bottom air inlet on the bottom plate, and an exhaust fan on the top. The water tank is installed on the upper part of the water tank heat dissipation area, and a ventilation opening is provided on the partition. The bottom front end of the unit's heat radiation area is also provided with a bottom air inlet, a fan is provided at the rear bottom plate of the carriage, and an exhaust fan is also provided at the top rear end of the unit's heat radiation area.

[0009] Preferably, the carriage uses low-density, high-strength aluminum alloy rectangular tubes and aluminum panels as the main materials. The carriage frame adopts a lightweight design, and polyurethane foam material is injected between the intervals of the frame. A perforated aluminum plate sound-absorbing structure is adopted, and microporous aluminum plates with a pore size of 2-5mm and a perforation rate of 15%-30% are used for interior decoration. The carriage base and wall panels are connected by connecting corner bolts. A shock-absorbing pad is laid on the carriage floor below the generator set to reduce vibration.

[0010] A grid-connected system for a pickup truck power supply vehicle, without an on-board reverse mains circuit breaker, collects the mains voltage signal through a grid-connected controller, adjusts the generator set's output voltage, frequency, and phase to meet synchronization conditions, and outputs a closing indication signal to the building's power distribution terminal. The circuit breaker in the power distribution room performs closing / opening to achieve grid-connected / off-grid switching, driving the building's power distribution room circuit breaker to complete grid connection. This includes single-unit load operation, single-unit primary and secondary grid-connected operation, multi-unit load operation, and multi-unit primary and secondary grid-connected operation. The specific steps are as follows: Single-unit operation with load: ① Connect the cable and disconnect the load end; ② Set the "Off-grid / On-grid" knob of G1 to the "Off-grid" position and the "First Unit / Intermediate Unit / Last Unit" knob to the "First Unit" position; ③ Start G1, close GCB, single-unit operation with load, close the load end; ④ After power supply is completed, disconnect the load end, open GC8, and stop G1.

[0011] Single-unit primary and secondary grid connection operations: Primary grid connection: ① Connect the cables; ② Set the "Off-grid / On-grid" knob of G1 to the "On-grid" position, and set the "First Unit / Intermediate Unit / Last Unit" knob to the "First Unit" position; ③ Set the system base load of the IM-210 unit to the user load value, start G1, close the GCB, and connect to the mains power grid; ④ Disconnect the mains power incoming switch; ⑤ Set the "Off-grid / On-grid" knob of G1 to the "Disconnect" position; ⑥ G1 unit island power supply. Secondary grid connection: ① Connect the cables ②; Set the "Off-grid / On-grid" knob of G1 to the "On-grid" position, and set the "First Unit / Intermediate Unit / Last Unit" knob to the "First Unit" position; ③ Set the system base load of the IM-210 unit to the user load value, start G1, close the GCB, and connect to the mains power grid; ④ Disconnect the mains power incoming switch; ⑤ Set the "Off-grid / On-grid" knob of G1 to the "Disconnect" position; ⑥ G1 unit island power supply.

[0012] Multi-machine operation under load: ① Connect the cables, including the communication cable and the self-starting cable. Disconnect the mains power supply switch and disconnect the load. ② Set the "Off-grid / On-grid" knobs of G1, G2, and G3 to the "Disconnect" position. ③ Set the "First Machine / Intermediate Machine / Last Machine" knobs of G1 and G3 to the "First Machine" position, and the "First Machine / Intermediate Machine / Last Machine" knob of G2 to the "Intermediate Machine" position. ④ Sequentially close GC81, GC82, GC83, G1, G2, and G3 to start them. ⑤ Connect G1, G2, and G3 for islanded power supply and close the load. ⑥ After power supply is completed, disconnect the load and sequentially open GC81, GCB2, and GCB3 to stop G1, G2, and G3.

[0013] Multi-unit primary and secondary grid connection operation: Primary grid connection: ① Connect the cables, including the communication cable and MCB feedback cable; ② Set the "Off-grid / On-grid" knob of G1 to the "On-grid" position; ③ Set the "First Unit / Intermediate Unit / Last Unit" knobs of G1 and G3 to the "First Unit" position, and the "First Unit / Intermediate Unit / Last Unit" knob of G2 to the "Intermediate Unit" position; ④ Set the IM-210 system base load of G1 to 75kW (the minimum base load of a single controller is 25kW, and the system base load is set according to the number of units); ⑤ Close the switches of GCB1, GC82, GCB3, G1, G2, and G3 in sequence to start them; then set the total system base load to the user load value; ⑥ Disconnect the mains power supply switch; ⑦ Set the "Off-grid / On-grid" knob of G1 to the "Disconnect" position, and G1, G2, and G3 are connected in parallel for islanded power supply. Secondary grid connection: ① Connect the voltage sampling line of G1; ② Set the "Off-grid / On-grid" knob of G1 to the "On-grid" position, set the system base load of 1G4-200 to the user load value, and press the IM-210 closing button; ③ When the synchronization indicator light illuminates, close the mains power incoming switch; ④ Set the IM-210 system base load of G1 to 75kW (the minimum base load of a single controller is 25kW, and the system base load is set according to the number of units); ⑤ Sequentially open GCB1, GC82, and GCB3 to shut down G1, G2, and G3; ⑥ Mains power is restored.

[0014] Compared with the prior art, the advantages and positive effects of the present invention are as follows: 1. The present invention adopts a split-type water tank diesel generator set, which has a simple overall structure, more space for noise reduction, and the engine is enclosed in the entire vehicle body, making it even quieter; at the same time, the split water tank reduces the length and height of the diesel generator set, allowing a larger power generator set to be placed in the same space. 2. This invention reduces the overall weight of the vehicle through lightweight design of the carriage, and the vehicle does not exceed the weight limit while installing a high-power generator set, thus meeting the vehicle registration requirements. 3. This invention uses a sound-absorbing and sound-insulating carriage + impedance composite noise reduction design to control the noise of the whole vehicle to 76dB (at 1m), minimizing the impact on surrounding residents when power is supplied, and not affecting their daily lives. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the vehicle's internal layout according to the present invention; Figure 2 This is a top view of the present invention; Figure 3 This is a schematic diagram of the muffler structure; Figure 4 This is a schematic diagram of cable connections for single-machine operation under load. Figure 5This is a schematic diagram of the cable connection for a single unit's grid connection operation. Figure 6 This is a schematic diagram of the cable connection for a single unit's secondary grid connection operation. Figure 7 This is a schematic diagram of cable connections for multi-machine operation under load. Figure 8 This is a schematic diagram of cable connections for multi-machine grid-connected operation. Figure 9 This is a schematic diagram of cable connections for multi-machine secondary grid connection operations.

[0016] Legend: 1-Pickup chassis, 2-Cargo box, 3-Generator set, 4-Water tank, 5-Auxiliary fuel tank, 6-Exhaust fan, 7-Fan, 8-Control cabinet, 9-Muffler; 21-Water tank heat dissipation area, 22-Unit heat radiation area, 23-Baffle, 91-Resistive silencer, 92-Reactive silencer. Detailed Implementation

[0017] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0018] Numerous specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways than those described herein, and therefore the invention is not limited to the specific embodiments disclosed in the following specification.

[0019] Please see Figure 1-4 The invention provides a pickup truck power supply vehicle, including a pickup chassis 1, a cargo box 2, and a generator set 3. The cargo box 2 is a lightweight, noise-reducing cargo box, divided into a front water tank cooling area 21 and a rear generator heat radiation area 22, with a partition 23 between the two parts. The water tank cooling area 21 is equipped with a water tank 4 and an auxiliary fuel tank 5. The generator set 3 is fixedly installed in the generator heat radiation area 22. The water tank 4 and the auxiliary fuel tank 5 are arranged separately from the generator set 3, which can reduce the length of the generator set and the weight of the base, thereby reducing the volume and weight of the power generation system, making full use of limited space, and increasing the power generation density of the vehicle. The water tank cooling area 21 adopts a negative pressure exhaust design. A side air inlet is provided on the side of the water tank cooling area 21, and a bottom air inlet (not shown in the figure) is provided on the bottom plate. An exhaust fan 6 is installed on the top. The water tank 4 is installed on the upper part of the water tank cooling area 21. Part of the air entering through the side and bottom air inlets is drawn in by the exhaust fan 6, passes through the water tank 4, and quickly removes the heat generated by the antifreeze inside the water tank 4 during operation. Ventilation openings (not shown in the figure) are provided on the partition 23. Part of the air entering through the side and bottom air inlets of the water tank cooling area 21 enters the unit's heat radiation area 22 through the ventilation openings of the partition 23.

[0020] Generator set 3 is a high-power-density generator set, installed in the generator set heat radiation zone 22 of the carriage 2. In this embodiment, an HD03.15D diesel engine is selected, which adopts turbocharging and electronically controlled high-pressure common rail technology to optimize combustion efficiency. It is equipped with a brushless excitation AC generator to directly output 400V / 230V AC power, eliminating the need for a mains circuit breaker and sampling cable for grid connection, thus reducing the overall vehicle weight. At the same time, generator set 3 adopts an aluminum alloy body and composite material shell, achieving lightweight components. It is a lightweight, high-speed engine with a rated speed of 3000 r / min. The front bottom of the unit's thermal radiation zone 22 is also equipped with a bottom air inlet (not shown in the figure). A fan 7 is installed at the rear floor of the carriage 2, and an exhaust fan 6 is installed at the rear top of the unit's thermal radiation zone 22. Through the forced ventilation of the fan 7 and the exhaust fan 6, the cold air entering the unit's thermal radiation zone 22 passes through the generator set 3 and is discharged from the rear lower and rear upper parts of the carriage 2. The entire unit's thermal radiation zone 22 can quickly ventilate and dissipate heat, maintain thermal balance, and ensure the long-term stable operation of the generator set 3. The carriage 2 is also equipped with deflectors and louvers to optimize the airflow path (not shown in the figure).

[0021] The control cabinet 8 is located inside the carriage 2, which contains the control system. The fan 7 is one of the main sources of noise. In order to better control the noise, when the power car is running at low power / for a short time, the heat generation is small and the heat dissipation requirement is small. The control system controls the fan 7 to rotate at low speed to reduce the noise of the entire system. When the power car is running at high power / for a long time, the heat generation increases and the heat dissipation requirement increases. The control system controls the fan 7 to rotate at high speed to enhance the heat dissipation capacity and ensure the normal operation of the machine.

[0022] To reduce noise, a silencer 9 is installed at the top of the unit's heat radiation zone 22. This silencer is a composite design of resistive silencer 91 and reactive silencer 92. The resistive silencer 91 absorbs high-frequency noise through sound-absorbing materials such as glass fiber and rock wool, while the reactive silencer 92 cancels low-frequency noise through Helmholtz resonant cavity and expansion chamber reflection. Combined with a multi-stage expansion cavity and perforated tube structure, it covers a wide frequency noise spectrum of 20Hz-5000Hz, reducing exhaust noise. The carriage 2 uses low-density, high-strength aluminum alloy rectangular tubes and aluminum panels as the main materials. The carriage frame adopts a lightweight design. While ensuring that the strength of the carriage meets the requirements of working conditions and use, redundant materials are removed, the frame density is reduced, and the overall vehicle weight is reduced. Polyurethane foam material (density 30-50kg / m³) is injected between the frame gaps to block the structural sound transmission path and reduce the efficiency of mid-to-low frequency vibration transmission (which can reduce it by 10-15dB). The vehicle employs a perforated aluminum plate sound-absorbing structure, using microporous aluminum plates with a pore size of 2-5mm and a perforation rate of 15%-30% for interior decoration, combined with an internal polyurethane foam layer for sound absorption and noise reduction. The underframe and wall panels of carriage 2 are riveted together using corner fittings to solve the problem of connecting dissimilar materials and avoid electrochemical corrosion. Vibration-damping pads are laid on the floor of the carriage below generator set 3 to reduce vibration noise. The water tank 4 uses a low-noise fan, and the air inlet and outlet of carriage 2 are designed as far away from noise sources as possible to reduce noise. Furthermore, the air inlet and outlet positions utilize a labyrinthine sound-absorbing duct, with the inner wall covered with porous sound-absorbing material. Deflector louvers are also added to the air outlets to reduce airflow impact noise, further reducing overall vehicle noise.

[0023] This invention relates to a pickup truck power supply system that does not include an onboard reverse mains circuit breaker. Instead, it uses a grid-connected controller to collect mains voltage signals and adjust the generator set's output voltage, frequency, and phase to meet synchronization requirements. A closing indication signal is then sent to the building's power distribution terminal. The circuit breaker in the distribution room performs closing / opening, achieving grid-connected / off-grid switching and driving the building's power distribution room circuit breaker to complete grid connection. This grid-connected technology without a mains circuit breaker simplifies the use of a conventional reverse mains circuit breaker on a power supply vehicle. Voltage sampling from the incoming mains circuit breaker is sent to the grid-connected controller for comparison with the generator set's output. The generator set automatically adjusts its voltage, frequency, and phase, and after synchronization is complete, a visual closing signal is synchronously output to the mains circuit breaker in the building's power distribution room. This visual signal allows for both non-operated and operated circuit breaker closing actions.

[0024] Grid connection operations include single-unit load operation, single-unit primary and secondary grid connection operation, multi-unit load operation, and multi-unit primary and secondary grid connection operation; the specific steps are as follows: Single-machine operation with load: ① Press Figure 4① Connect the cable and disconnect the load end; ② Set the "Off-grid / On-grid" knob of G1 to the "Off-grid" position and the "First Machine / Intermediate Machine / Last Machine" knob to the "First Machine" position; ③ Start G1, close GCB, and connect the load end with a single machine; ④ After the power supply is completed, disconnect the load end, open GC8, and stop G1.

[0025] Single-unit primary and secondary grid connection operations: Primary grid connection: ① According to Figure 5 ① Connect the cables; ② Set the "Off-grid / On-grid" knob of G1 to the "On-grid" position, and the "First Unit / Intermediate Unit / Last Unit" knob to the "First Unit" position; ③ Set the system base load of unit IM-210 to the user load value, start G1, close the GCB, and connect to the mains power grid; ④ Disconnect the mains power incoming switch; ⑤ Set the "Off-grid / On-grid" knob of G1 to the "Disconnect" position; ⑥ G1 is isolated for islanded power supply. Secondary grid connection: ① Press Figure 6 ① Connect the cables; ② Set the "Off-grid / On-grid" knob of G1 to the "On-grid" position and the "First Unit / Intermediate Unit / Last Unit" knob to the "First Unit" position; ③ Set the system base load of the IM-210 unit to the user load value, start G1, close the GCB, and connect to the mains power grid; ④ Disconnect the mains power incoming switch; ⑤ Set the "Off-grid / On-grid" knob of G1 to the "Disconnect" position; ⑥ Provide isolated power supply for G1 unit.

[0026] Multi-machine load operation: ① Press Figure 7 ① Connect the cables, including the communication cable and the self-starting cable. Disconnect the mains power supply switch and disconnect the load. ② Set the "Off-grid / On-grid" knobs of G1, G2, and G3 to the "Disconnect" position. ③ Set the "First Unit / Intermediate Unit / Last Unit" knobs of G1 and G3 to the "First Unit" position, and the "First Unit / Intermediate Unit / Last Unit" knob of G2 to the "Intermediate Unit" position. ④ Sequentially close GC81, GC82, GC83, G1, G2, and G3 to start them in sequence. ⑤ Connect G1, G2, and G3 for islanded power supply and close the load. ⑥ After power supply is completed, disconnect the load and sequentially open GC81, GCB2, and GCB3 to stop G1, G2, and G3.

[0027] Multi-machine primary and secondary grid connection operations: Primary grid connection: ① Press Figure 8① Connect the cables, including the communication cable and MCB feedback cable; ② Set the "Off-grid / On-grid" knob of G1 to the "On-grid" position; ③ Set the "First Unit / Intermediate Unit / Last Unit" knobs of G1 and G3 to the "First Unit" position, and the "First Unit / Intermediate Unit / Last Unit" knob of G2 to the "Intermediate Unit" position; ④ Set the IM-210 system base load of G1 to 75kW (the minimum base load of a single controller is 25kW, and the system base load is set according to the number of units); ⑤ Close the switches in sequence: GCB1, GC82, GCB3, G1, G2, G3 to start sequentially; then set the total system base load to the user load value; ⑥ Disconnect the mains power supply switch; ⑦ Set the "Off-grid / On-grid" knob of G1 to the "Disconnect" position, and G1, G2, G3 will be connected in parallel for islanded power supply. Secondary grid connection: ① Press Figure 9 ① Connect the voltage sampling line of G1; ② Set the "Off-grid / On-grid" knob of G1 to the "On-grid" position, set the system base load of 1G4-200 to the user load value, and press the IM-210 closing button; ③ When the synchronization indicator light illuminates, close the mains power incoming switch; ④ Set the IM-210 system base load of G1 to 75kW (the minimum base load of a single controller is 25kW, and the system base load is set according to the number of units); ⑤ Open GCB1, GC82, and GCB3 in sequence to shut down G1, G2, and G3; ⑥ Restore mains power supply.

[0028] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A pickup truck power supply vehicle, characterized in that: The vehicle includes a pickup truck chassis, a cargo box, and a generator set. The cargo box is a lightweight, noise-reducing structure divided into a front water tank cooling area and a rear generator set heat radiation area, separated by a partition. The water tank cooling area contains a water tank and an auxiliary fuel tank. The generator set is a high-power-density generator set, fixedly installed within the generator set heat radiation area, and features an aluminum alloy body and a composite material shell. A control cabinet with a control system is located inside the cargo box. A muffler, a composite design of resistive and reactive mufflers, is installed on the top of the generator set heat radiation area.

2. The pickup truck power supply vehicle according to claim 1, characterized in that: The water tank heat dissipation area adopts a negative pressure exhaust design. A side air inlet is provided on the side of the water tank heat dissipation area, a bottom air inlet is provided on the bottom plate, and an exhaust fan is installed on the top. The water tank is installed on the upper part of the water tank heat dissipation area, and a ventilation opening is provided on the partition. A bottom air inlet is also provided at the front bottom of the unit's heat radiation area. A fan is provided at the rear bottom plate of the carriage, and an exhaust fan is also provided at the rear top of the unit's heat radiation area.

3. A pickup truck power supply vehicle according to claim 1, characterized in that: Preferably, the carriage uses low-density, high-strength aluminum alloy rectangular tubes and aluminum panels as the main materials. The carriage frame adopts a lightweight design, and polyurethane foam material is injected between the intervals of the frame. A perforated aluminum plate sound-absorbing structure is adopted, and microporous aluminum plates with a pore size of 2-5mm and a perforation rate of 15%-30% are used for interior decoration. The carriage base and wall panels are connected by connecting corner bolts. A shock-absorbing pad is laid on the carriage floor below the generator set to reduce vibration.

4. A grid connection system for a pickup truck power supply vehicle as described in claim 1, characterized in that: The vehicle-mounted reverse circuit breaker collects the mains voltage signal through the grid-connected controller and adjusts the generator set's output voltage, frequency, and phase to meet synchronization conditions; it outputs a closing indication signal to the building's power distribution terminal; the power distribution room circuit breaker executes closing / opening to realize grid-connected / off-grid switching, driving the building's power distribution room circuit breaker to complete grid connection, including single-unit load operation, single-unit primary and secondary grid connection operation, multi-unit load operation, and multi-unit primary and secondary grid connection operation; The specific steps are as follows: Single-unit operation with load: ① Connect the cable and disconnect the load end; ② Set the "Off-grid / On-grid" knob of G1 to the "Off-grid" position and the "First Unit / Intermediate Unit / Last Unit" knob to the "First Unit" position; ③ Start G1, close GCB, single-unit operation with load, close the load end; ④ After power supply is completed, disconnect the load end, open GC8, and stop G1.

5. Single unit primary and secondary grid connection operations: Primary grid connection: ① Connect the cables; ② Set the "Off-grid / On-grid" knob of G1 to the "On-grid" position, and set the "First Unit / Intermediate Unit / Last Unit" knob to the "First Unit" position; ③ Set the system base load of the unit IM-210 to the user load value, start G1, close the GCB, and connect to the mains power grid; ④ Disconnect the mains power supply switch; ⑤ Set the "Off-grid / On-grid" knob of G1 to the "Disconnect" position; ⑥ Power supply to G1 in standalone island mode. Secondary grid connection: ① Connect the cables; ② Set the "Off-grid / On-grid" knob of G1 to the "On-grid" position, and set the "First Unit / Intermediate Unit / Last Unit" knob to the "First Unit" position; ③ Set the system base load of the unit IM-210 to the user load value, start G1, close the GCB, and connect to the mains power grid. ④ Disconnect the mains power supply switch; ⑤ Set the "Off-grid / On-grid" knob of G1 to the "Disconnect" position; ⑥ Power supply to G1 in a standalone island.

6. Multi-machine operation under load: ① Connect the cables, including the communication cable and the self-starting cable. Disconnect the mains power supply switch and disconnect the load. ② Set the "Off-grid / On-grid" knobs of G1, G2, and G3 to the "Disconnect" position. ③ Set the "First Machine / Intermediate Machine / Last Machine" knobs of G1 and G3 to the "First Machine" position, and the "First Machine / Intermediate Machine / Last Machine" knob of G2 to the "Intermediate Machine" position. ④ Sequentially close GC81, GC82, GC83, G1, G2, and G3 to start them. ⑤ Connect G1, G2, and G3 for islanded power supply and close the load. ⑥ After power supply is completed, disconnect the load and sequentially open GC81, GCB2, and GCB3 to stop G1, G2, and G3.

7. Multi-unit primary and secondary grid connection operation: Primary grid connection: ① Connect the cables, including the communication cable and MCB feedback cable; ② Set the "Off-grid / On-grid" knob of G1 to the "On-grid" position; ③ Set the "First Unit / Intermediate Unit / Last Unit" knobs of G1 and G3 to the "First Unit" position, and the "First Unit / Intermediate Unit / Last Unit" knob of G2 to the "Intermediate Unit" position; ④ Set the IM-210 system base load of G1 to 75kW (the minimum base load of a single controller is 25kW, and the system base load is set according to the number of units); ⑤ Close the switches of GCB1, GC82, GCB3, G1, G2, and G3 in sequence to start them; then set the total system base load to the user load value; ⑥ Disconnect the mains power supply switch; ⑦ Set the "Off-grid / On-grid" knob of G1 to the "Disconnect" position, and G1, G2, and G3 are connected in parallel for islanded power supply. Secondary grid connection: ① Connect the voltage sampling line of G1; ② Set the "Off-grid / On-grid" knob of G1 to the "On-grid" position, set the system base load of 1G4-200 to the user load value, and press the IM-210 closing button; ③ When the synchronization indicator light illuminates, close the mains power incoming switch; ④ Set the IM-210 system base load of G1 to 75kW (the minimum base load of a single controller is 25kW, and the system base load is set according to the number of units); ⑤ Sequentially open GCB1, GC82, and GCB3 to shut down G1, G2, and G3; ⑥ Mains power is restored.

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