A control method applied to an energy storage converter device

Abstract

The invention relates to an energy storage converter device and a control method, belonging to the technical field of power electronics. According to the energy storage converter device and the control method, a self-powering design of a main control system of the energy storage converter device is added by utilizing an advanced microelectronic technology, thus a creative self-power-acquisition independent operating mode of a converter device control module and a corresponding flexible and diversified multiple power supply approach adopting an external power bank mobile battery, external dataequipment and a built-in battery to supply power for the independent operation of the converter device control module are realized, thus the energy storage converter device ensures that the adoption of a strategy that the converter device control module operates independently and a converter circuit stops operating can be automatically determined in a non-charging / discharging period during operation in a current source mode while a power grid operates normally, the self-consumption of the device is significantly reduced, and the valuable storage battery power energy can be saved for microgridand off-grid applications; in addition, the effect of being able to carry out installation debugging and offline maintenance and inspection continuously when the power grid is abnormal and no storagebattery pack string nor external power supplies power to the device can be realized, and the working efficiency and the resource utilization rate are improved.

Description

technical field [0001] The invention relates to a control method applied to an energy storage converter device, belonging to the technical field of power electronics, and in particular to a control method applied to an energy storage converter device. Background technique [0002] At present, global new energy is being widely used and promoted, making more and more contributions to the ecological development of human society, and the subsequent power electronic devices are also developed simultaneously; however, the main application of the converter device is the rectifier A power electronic device for power commutation composed of a circuit, a chopper circuit, and a frequency-changing phase-changing circuit has exposed many defects in its application. [0003] The start-up and operation of the converter device in the existing technology in the industry needs to be connected to the power supply for its operation. The battery string connected to the current device provides p...

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Problems solved by technology

[0002] At present, global new energy is being widely used and promoted, making more and more contributions to the ecological development of human society, and the subsequent power electronic devices are also developed simultaneously; however, the main application of the converter device is the rectifier A power electronic device for power commutation composed of a circuit, a chopper circuit, and a frequency-changing phase-changing circuit has exposed many defects in its application.

[0003] The start-up and operation of the converter device in the existing technology in the industry needs to be connected to the power supply for its operation. The battery string connected to the current device provides power, which causes many problems in application practice. Take the energy storage converter device as an example: during the initial installation and commissioning, especially in micro-grids and areas without electricity, for installation and commissioning needs Equipped with a diesel generator, which increases investment and operation and maintenance costs; after the energy storage converter device is connected to the network, when the power grid or micro-grid fails or is abnormal, especially when the energy storage battery is lower than the discharged power and the UPS power is used up In this case, inspection and maintenance cannot be carried out, which will affect the system recovery time and reduce the system benefit; when the power grid or micro-grid is in normal operation, the energy storage converter device is in a state of neither charging nor discharging for a considerable amount of time, such as energy storage peak shaving Application; even if it is not charging or discharging, in order to maintain real-time communication with the upper computer management and control system, the energy storage converter device keeps running, and its own power consumption is especially important for microgrid and off-grid operation scenarios. Therefore, a lot of precious battery power energy is wasted.

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