Storage battery energy storage conditioning device

Abstract

The invention relates to a storage battery energy storage conditioning device, which is characterized by comprising at least two charging and discharging management systems and a main system monitor, wherein the AC sides of the charging and discharging management systems are connected with a public bus-bar in parallel, and then are connected with a high voltage main bus-bar through a transformer, and the DC side of each charging and discharging management system is connected with a storage battery so as to control the two-way conditioning of active power and reactive power of the storage battery and PCC points formed by the main bus-bar and the public bus-bar in a range of upper limit and lower limit voltage values, so that the voltage and frequency of the PCC points are stable; and the main system monitor is in information interaction with the charging and discharging management systems through a plurality of CAN interfaces, and controls an external standby power to supply power to the high voltage main bus-bar or control unloading charges to consume electric energy output by the high voltage main bus-bar according to the instructions of the charging and discharging management systems, so that the voltage and frequency of the PCC points are stable. The invention is easy to realize, saves cost, and is suitable for combining an independent power system with a megawatt-class wind generating unit, and supplying power to offshore oilfield platforms and remote areas.

Description

technical field [0001] The invention relates to a power conditioning device, in particular to a battery energy storage regulating device (Power Conditioning System, PCS). Background technique [0002] my country's power grid is still unable to cover all regions of the country, such as remote areas, offshore oil field platforms, etc. This is because long-distance power transmission will not only cause a lot of power loss, greatly increase costs, but also be very difficult to achieve. As we all know, offshore and some remote areas are rich in wind resources. If wind resources can be effectively utilized and an independent power supply system can be established, the difficult problem of "island power grid" power supply can be well solved. However, due to the intermittent, fluctuating and uncontrollable characteristics of wind energy, a battery energy storage regulating device is needed to balance the fluctuation of the wind power of the fan, so as to stabilize the output voltag...

AI Technical Summary

Problems solved by technology

As far as the existing technology is concerned, the battery energy storage regulating device suitable for forming an independent power supply system with kilowatt-level wind turbines has been applied, but the battery energy storage regulating device suitable for forming an independent power supply system with megawatt-level wind turbines has not yet , and the voltage and frequency fluctuations of independent wind power systems ranging from kilowatts to megawatts are increasing, and the voltage and frequency stability control of the system is facing greater challenges. More superior control methods and reasonable system structures are needed to ensure system stability. sex

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