Micro grid energy storage device design method based on capacity limit value constrain

Abstract

A micro grid energy storage device design method based on capacity limit value constrain includes 1, inputting the planning area distribution-type power supply allocation capacity and the type and distribution situation of an energy storage device; 2, inputting the planning area load and historical weather data; 3, establishing a distribution-type power supply force model and an energy storage charging and discharging module; 4, calculating the lower limit of the energy storage device allocation capacity; 5, calculating the upper limit of the energy storage device allocation capacity; 6, calculating the optimal value of the energy storage device allocation capacity in the range of the limit value. By the aid of the method, on the basis that the energy storage device capacity limit value of a connected-type micro grid is met, the optimal energy storage device capacity allocation matching with distribution type power generation is calculated, the requirements on reliability and economy of the micro grid can be met through the energy storage device capacity to the utmost extent, and clean, safe and reliable power is provided for loading.

Description

technical field [0001] The invention relates to a design method of a micro-grid energy storage device based on capacity limit constraints for the planning and design of an urban grid-connected micro-grid system. Background technique [0002] The current energy situation is tense and environmental pollution is serious. The state has issued various policies to support the transformation of the power grid and reduce the pressure on the power grid. As the load continues to grow, it puts forward higher requirements for power quality and power supply reliability. At present, the energy storage device technology is more and more favored by users because of its characteristics of storing electric energy, being able to realize peak shaving and valley filling, and smoothing power fluctuations. The system energy storage device can perform active / reactive power control, realize real-time balance of system power, and compensate for fluctuations in renewable energy, thereby improving sys...

AI Technical Summary

Problems solved by technology

[0014] In the actual planning of the existing microgrid, the above two forms are mostly used alone, and have not been considered comprehensively

Therefore, the configuration of energy storage devices in the prior art is difficult to meet the multi-objective requirements of smoothing power and peak shaving and valley filling at the same time.

Conventional methods will, to a certain extent, cause more or less redundancy or insufficiency in the capacity of the energy storage device configuration, thus affecting the economics of the energy storage device configuration

The construction of micro-grids in the prior art often uses single constraints such as smooth power or energy management to formulate the capacity of energy storage devices with the goal of economy, and it is difficult to meet the multi-objective requirements of smooth power and peak shaving and valley filling.

If the goal is only to smooth power, there will be a problem that the capacity of the energy storage device is too small to achieve the expected control target during the annual operation; Plant capacity is idle, adding unnecessary construction and operating costs

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