Heavy-load auxiliary loading system of generator

Abstract

The utility model relates to the technical field of power supply, in particular to a large-load auxiliary loading system of a generator, which is applied to an inductive load or a non-linear load and comprises a main power loop and an auxiliary power loop, the auxiliary power loop is used for being connected with the main power loop in a grid mode to start the load, and after the load is started successfully, the main power loop independently supplies power to the load; when the load is started independently through the main power loop and the output voltage of the main power loop is reduced to a set grid-connected voltage, the auxiliary power loop is connected with the main power loop in a grid mode; and after the load is successfully started, when the output voltage rises to the set grid-connected voltage, the auxiliary power loop is separated from the grid connection with the main power loop. According to the utility model, continuous power supply can be realized for the inductive load and the non-linear load during working through the low-power generator set, the use cost and the transportation cost of the generator set are reduced, and the cost performance of the product is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of power supply, in particular to a large-load auxiliary loading system for a generator. Background Art

[0002] When the generator set carries an inductive load, such as an electric motor, and carries a nonlinear load, such as a charging module, the instantaneous starting current required is 2-3 times the rated current. In the prior art, in order to meet the above requirements, for such electrical equipment, the generator set is usually selected in the way of a big horse pulling a small cart, that is, the generator set with corresponding power is selected according to the instantaneous power. The problems of this method are: the generator set used is high in cost, large in size, and high in transportation cost. Utility Model Content

[0003] The utility model aims to provide a large-load auxiliary loading system for a generator, so as to reduce the use cost and transportation cost of a generator set.

[0004] The generator large load auxiliary loading system is applied to inductive load or nonlinear load, including a main power circuit and an auxiliary power circuit. The auxiliary power circuit is used to connect to the main power circuit to start the load. When the load is successfully started, the main power circuit supplies power to the load alone.

[0005] Explanation: The large load mentioned in the present utility model refers to an inductive load or a nonlinear load.

[0006] The beneficial effect of the utility model is that: through the above-mentioned design, when there is an inductive load or a nonlinear load, when the required instantaneous starting current is large, the auxiliary power circuit and the main power circuit can be connected to the grid to start the load, thereby meeting the instantaneous starting requirement. When the load is successfully started, the main power circuit supplies power to the load alone, so that the actual needs of inductive loads and nonlinear loads can be met through a small-power generator set, realizing the design of a small horse pulling a big cart, and reducing the use cost and transportation cost of the generator set.

[0007] A preferred implementation manner of the utility model is that the main power circuit includes an engine, a magneto, a main inverter and a main circuit output end.

[0008] A preferred implementation manner of the utility model is that the auxiliary power circuit comprises an energy storage module, an auxiliary inverter and an auxiliary circuit output end.

[0009] The preferred implementation of the utility model is that when the load is started by the main power circuit alone, when the output voltage of the main power circuit drops to the set grid-connected voltage, the auxiliary power circuit is connected to the main power circuit. When a generator set drives an inductive load or a nonlinear load, if the instantaneous starting power requirement cannot be met during instantaneous starting, the output voltage of the generator set will drop. Through the above design, when the output voltage of the main power circuit drops to the set grid-connected voltage, it is used as a condition for triggering the grid connection of the auxiliary power circuit, so that the auxiliary power circuit is connected to the main power circuit to drive the load to start instantaneously, thereby ensuring successful start-up of the load.

[0010] The preferred implementation of the utility model is that when the auxiliary power circuit is connected to the main power circuit, the two circuits supply power to the load in a set ratio, so as to reasonably distribute the load power supply during load startup.

[0011] The preferred implementation of the utility model is that when the load is successfully started and the output voltage rises back to the set grid-connected voltage, the auxiliary power circuit is disconnected from the main power circuit. When the load is successfully started, if the output voltage rises back to the set grid-connected voltage, this is used as a trigger condition to disconnect the auxiliary power circuit from the main power circuit, and the main power circuit supplies power to the load alone, so that the small power generator set can work alone with an inductive load or a nonlinear load.

[0012] The preferred embodiment of the utility model is that a charging module is provided between the main circuit output end of the main power circuit and the energy storage module. When the energy storage module is insufficiently charged, the energy storage module can be charged by the generator set through the charging module. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic block diagram of an embodiment of a large-load auxiliary loading system for a generator according to the utility model.

[0014] Figure 2 This is a schematic diagram of the grid-connected triggering conditions of the large-load auxiliary loading system of the generator of the utility model. DETAILED DESCRIPTION

[0015] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described below are only used to explain the present invention and will not limit the protection scope of the present invention.

[0016] The terms "first", "second" and the like in the specification, claims and embodiments of the present application are used to distinguish similar objects rather than to describe a specific order or sequential sequence.

[0017] The present invention is further described in detail below through preferred specific embodiments:

[0018] As attached Figure 1 As shown: Generator large load auxiliary loading system, applied to inductive load or nonlinear load, as shown in the attached Figure 1 As shown, it includes a main power circuit and an auxiliary power circuit, the main power circuit includes an engine, a magnetic motor, a main inverter and a main circuit output end, the auxiliary power circuit includes an energy storage module, an auxiliary inverter and an auxiliary circuit output end, and a charging module is provided between the main circuit output end of the main power circuit and the energy storage module. In this embodiment, the energy storage module adopts a battery.

[0019] The auxiliary power circuit is used to connect to the main power circuit and start the load. Specifically, when the load is started by the main power circuit alone, when the output voltage of the main power circuit drops to the set grid voltage, the auxiliary power circuit is connected to the main power circuit. After the auxiliary power circuit is connected to the main power circuit, the two power the load at a set ratio. When the load is successfully started, the main power circuit supplies power to the load alone. Specifically, when the load is successfully started and the output voltage rises back to the set grid voltage, the auxiliary power circuit is disconnected from the main power circuit.

[0020] The working principle of the engine heavy load auxiliary loading system of this embodiment is as follows:

[0021] The energy storage module provides direct current to start the engine, completing the engine start;

[0022] The engine cooperates with the magnetic motor to provide three-phase power output, which is processed by the main inverter to output power of a certain voltage and frequency to start the load;

[0023] As attached Figure 2 As shown, when the load is started, the instantaneous power demand of the load is greater than the output power of the generator set, causing the output voltage of the generator set to drop. When the output voltage drops to the set grid-connected voltage, the auxiliary power circuit is connected to the main power circuit and provides power to the load according to the set ratio with the main power circuit; when the load is successfully started, the required power is reduced, which is manifested as a voltage recovery. When the voltage recovers to the set grid-connected voltage, the auxiliary inverter is turned off, and the auxiliary power circuit is disconnected from the grid connection with the main power circuit. In this embodiment, the auxiliary power circuit is connected to the main power circuit using the droop principle.

[0024] When the energy storage module is low on power, the energy storage module is charged through a charging module between the output end of the main power circuit and the energy storage module.

[0025] The preferred implementation mode of the present application is described in detail above in conjunction with the accompanying drawings. The typical known structures and common knowledge technologies in the preferred implementation mode are not described in detail here. Ordinary technicians in the relevant field can improve and implement the technical solution of the utility model based on their own abilities under the inspiration given by the present implementation mode. Some typical known structures, known methods or common knowledge technologies should not become obstacles for ordinary technicians in the relevant field to implement the present application.

[0026] The scope of protection required by this application shall be based on the contents of its claims, and the contents of the utility model, specific implementation methods and the contents recorded in the drawings of the specification shall be used to interpret the claims.

[0027] Within the technical concept of the present application, several modifications may be made to the specific implementation methods of the present application, and these modified specific implementation methods should also be regarded as within the protection scope of the present application.

Claims

1. Generator large load auxiliary loading system, characterized by: It is applied to inductive load or nonlinear load, including a main power circuit and an auxiliary power circuit. The auxiliary power circuit is used to connect to the main power circuit to start the load. When the load is successfully started, the main power circuit supplies power to the load alone.

2. The generator large load auxiliary loading system according to claim 1 is characterized in that: The main power circuit includes an engine, a magneto, a main inverter and a main circuit output end.

3. The generator large load auxiliary loading system according to claim 1, characterized in that: The auxiliary power circuit includes an energy storage module, an auxiliary inverter and an auxiliary circuit output end.

4. The generator large load auxiliary loading system according to claim 1, characterized in that: When the load is started through the main power circuit alone, when the output voltage of the main power circuit drops to the set grid-connected voltage, the auxiliary power circuit is connected to the main power circuit.

5. The generator large load auxiliary loading system according to claim 4, characterized in that: When the auxiliary power circuit is connected to the main power circuit, the two supply power to the load in a set ratio.

6. The generator heavy load auxiliary loading system according to claim 4, characterized in that: When the load is successfully started and the output voltage returns to the set grid-connected voltage, the auxiliary power circuit is disconnected from the main power circuit.

7. The generator large load auxiliary loading system according to claim 2, characterized in that: A charging module is provided between the main circuit output end of the main power circuit and the energy storage module.

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