A method for realizing the control of solar-storage microgrid in the park

Abstract

The present invention relates to a method for realizing the control of the photovoltaic storage micro-grid in a park, including: a grid-connected shutdown stage; a black start stage; an off-grid shutdown stage; Grid-connected operation is converted to grid-connected operation; peak-valley arbitrage stage: After the grid-connected operation mode runs stably, the main energy storage device and the secondary energy storage Execute the peak-to-valley cash-out strategy. The invention obtains the data of the voltage transformer installed on the AC busbar and the AC contactor at the connection between the distribution network side and the microgrid system in real time through the remote measurement monitoring terminal of the central controller of the microgrid in the park, and judges whether there is a power outage on the large power grid side, and then judges Whether the whole system enters the grid-connected or off-grid state, the corresponding control commands are issued to implement the grid-connected and off-grid strategy, so as to realize the effective sequence control of the power supply system of the entire park.

Description

technical field [0001] The invention relates to the technical field of micro-grid control in electric power systems, in particular to a method for realizing the control of an optical-storage micro-grid in a park. Background technique [0002] With the continuous advancement of micro-grid technology, the construction scale and practical level of the micro-grid system have been continuously improved, and it has gradually changed from a small system with a single new energy source and a small load to a larger medium-voltage system with a variety of new energy sources and a larger load. system development. Due to the rapid development of new energy technologies, the micro-grid in the park is an important landing point for new energy formats such as multi-energy complementarity and energy Internet. a technical means. As a key part of the Energy Internet, the integrated energy system oriented to the park micro-grid has the characteristics of flexible operation mode, low-carbon a...

AI Technical Summary

Problems solved by technology

[0003] The load in the business park has unstable power supply during the peak period of power consumption of the large power grid, and is easily affected by power outages on the grid side. Once a power outage occurs, it will cause a large area of ​​production and shutdown, and cause the business park to suffer huge economic losses. Therefore, a Efficient emergency power supply method that makes great economic sense

The emergency power supply method in the traditional sense includes traditional microgrid power supply and uninterruptible power supply UPS power supply, but the traditional microgrid contains a variety of distributed power sources, covers a large area, and has high investment costs. It is not only difficult to transplant the system to a business park as a whole , equipment costs and post-maintenance costs are high, and the applicability is not high, which does not meet the economical requirements of business parks

The use of uninterruptible power supply UPS power supply can only meet the short-term emergency power supply of some important loads, and cannot maintain the long-term stable and effective power supply of the entire business park, and cannot meet the office production power consumption of the park

Therefore, there are many defects in the emergency power supply method in the traditional sense, which is not enough to meet the load requirements of the park. It is particularly important to design an effective control method for the solar-storage microgrid in the park.

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