Multi-source complementary power supply grid-connected optimization system

Abstract

The invention discloses a multi-source complementary power supply grid-connected optimization system, and belongs to the technical field of distributed power supply grid connection. Multi-source complementary power supply grid-connected optimization is realized through three steps of power constraint, coordinated operation and establishment of a target function of the system. The multi-source complementary power supply grid-connected optimization system has the advantages of stabilizing randomness and volatility of wind power generation and photovoltaic power generation, meanwhile, frequent charging and discharging of stored energy are reduced, and the service life of the stored energy is prolonged. The problems of wind abandoning and light abandoning are solved. The novel hydrogen production method disclosed by the invention is synchronously carried out, great progress is achieved, and the hydrogen production efficiency is also improved by about 60% from the original less than 20%. A good foundation is provided for cooperative use of hydrogen energy storage, wind energy and light energy. According to the invention, the manual operation of a dispatcher is reduced, and the accuracy of plan making is improved. The system is used for processing the actual data to obtain the operation plan data meeting the requirements, and has high practical value.

Description

technical field [0001] The invention belongs to the technical field of grid connection of distributed power sources, and in particular relates to a multi-source complementary power source grid connection optimization system. Background technique [0002] In recent years, new energy sources such as wind power and photovoltaics have developed rapidly due to clean and environmental protection, but while continuously optimizing the energy structure, they have also brought certain challenges to the safe operation of my country's power grid. Although new energy is clean, the power generation end cannot keep pace with the rhythm of the large power grid. For example, photovoltaic power generation requires sufficient sunlight; the intermittent and random nature of wind power generation increases the potential risk of stable operation of the power grid. The regulation of new energy is difficult to keep in line with the large power grid, making its large-scale safe grid connection a lo...

AI Technical Summary

Problems solved by technology

Due to the increase of control variables, the optimal solution time becomes longer, which is not conducive to the real-time control of the power generation system

Moreover, the randomness of wind and light resources and the variability of loads make the combined power generation system present a strong nonlinearity, and it is difficult to establish an accurate model of the system. It is very difficult to control it with traditional control methods. Even if an accurate model is established, It can't solve the problem of abandoning wind and light

[0006] The natural attributes of renewable energy determine its characteristics such as strong intermittent output, large fluctuations, and poor controllability.

At present, my country adopts the electricity price mechanism of grid-connected electricity price, but wind power or photovoltaic power generation is still in the form of "self-sufficiency", which easily makes its return on investment unreasonable evaluation

With the increasing economic conditions and friendly requirements for the environment, renewable energy needs large-scale centralized utilization, but when it is connected to the power grid on a large scale, it will reduce the frequency regulation and voltage regulation ability of the power grid and the anti-disturbance ability, which will seriously affect the system operation. The stability and safety reliability of

If this series of problems cannot be improved, it will be impossible to use renewable energy on a large scale

In addition, at present, when renewable energy is connected to the grid, there are still serious light, wind and water abandonment phenomena, and the utilization rate of resources cannot be guaranteed to the maximum.

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