Method for connecting generator set and inverter power supply in parallel

A technology of generator set and inverter power supply, which is applied in the direction of emergency power supply arrangement, electrical components, circuit devices, etc., and can solve problems such as short-term power outages and continuous power supply that cannot be loaded

Pending Publication Date: 2020-05-05
SMARTGEN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the switching process of the dual main power supply, there is a short-term power failure in the system, which makes it impossible to continuously supply power to the load

Method used

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Embodiment Construction

[0013] The technical solutions of the present invention will be described in further detail below through specific implementation methods.

[0014] A method for parallel connection of a generator set and an inverter power supply, including the generator set and the inverter power supply, the method includes the following steps:

[0015] Step 1, make the inverter work in voltage mode with load;

[0016] Step 2. When it is detected that the energy storage of the inverter power supply is insufficient and meets the start-up conditions of the generator set, the generator set is turned on, and the parallel generator set works in a constant power mode, so that the generator set can use the inverter power supply as the mains power;

[0017] Step 3, control the frequency and voltage of the generator set through the speed regulation and voltage regulation port, so that the power generation of the generator set and the inverter power supply are synchronized;

[0018] Step 4, after meeti...

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Abstract

The invention provides a method for connecting a generator set and an inverter power supply in parallel. The method comprises the generator set and the inverter power supply, and comprises the steps of 1 enabling the inverter power supply to work in a voltage mode for loading; 2 when it is detected that energy storage of the inverter power supply is insufficient and the starting condition of the generator set is met, starting the generator set , and setting the generator set to work in a constant power mode; 3 controlling the frequency and the voltage of the generator set through a speed regulation and voltage regulation port to synchronize the power generation of the generator set with the inverter power supply; and 4 after the synchronization condition is met and a power generation circuit breaker is controlled to be switched on, enabling the generator set to work in an island mode, and meanwhile, enabling the inverter power supply to work in a current mode to finish parallel connection. According to the invention, the generator set is flexibly switched between the island mode and the constant power mode, and the inverter power supply is flexibly switched between the voltage modeand the current mode, so that the power supply is not interrupted in the switching process of the double main power supplies, and continuous power supply to the load is realized.

Description

technical field [0001] The invention belongs to the field of generator control, and in particular relates to a method for parallel connection of a generator set and an inverter power supply. Background technique [0002] When the battery energy storage system is used as the main power source in the independent power system, the grid-connected inverter for energy storage works in the independent operation mode, and controls the voltage amplitude and frequency of the AC busbar on the outlet side to be constant. This control method is fundamentally different from diesel generators. The energy storage system is limited by the power electronic devices in the inverter, and generally does not have short-term overcurrent capability. When the generator set and the energy storage grid-connected inverter are running in parallel, if the energy storage grid-connected inverter still works in the independent operation mode, the disturbance of the net load in the independent power system wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02J3/42H02J9/08
CPCH02J3/38H02J3/42H02J9/08
Inventor 王向前杜占军解骏易娜郐晓梅
Owner SMARTGEN TECH
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