Water-light combined dispatching output distribution method considering receiving end load characteristics

Abstract

The invention discloses a water-light combined dispatching output distribution method considering receiving end load characteristics, and the method comprises the steps of: predicting a day load curve of a receiving end power grid, and enabling each time period of the day to be divided into a power utilization peak time period and a power utilization valley time period; adding an obtained photovoltaic prediction output process and a cascade hydropower output process to obtain an original water-light total output; calculating the output of the water-light superposition exceeding a power transmission channel, the residual output space of the power transmission channel and the residual output space of cascade hydropower, determining the adjustable output of the cascade hydropower, and calculating the degradable output of the cascade hydropower; and correcting the cascade hydropower output process according to an intelligent output distribution method to realize output distribution of photovoltaic power and cascade hydropower. According to the invention, on the premise of ensuring that the hydropower output is not damaged, the adjustable performance of the reservoir is utilized to adjust the hydropower output process within one day, so that the power grid absorbs the photovoltaic output as much as possible, the total output process after water-light complementation conforms to the load characteristics of a receiving end, and the formulation of a power dispatching scheme is facilitated.

Description

technical field [0001] The invention relates to a photovoltaic energy system, and in particular to an output distribution method for hydro-solar joint scheduling considering the load characteristics of a receiving end. Background technique [0002] In the current energy structure, the proportion of new energy such as solar energy has been greatly increased, but the large-scale connection of new energy to the power grid will cause a serious decline in the regulation capacity of the power system, which poses great challenges to the safe and stable operation of the power system. At the same time, due to the intermittent and fluctuating characteristics of solar energy, the phenomenon of light abandonment in the actual operation process is relatively serious. Hydropower has the advantages of fast output adjustment response speed and strong energy storage capacity. Therefore, it is necessary to carry out research on complementary power generation technologies for the coordinated u...

AI Technical Summary

Problems solved by technology

[0003] The existing active power distribution method of wind, wind and water maximizes the use of potential wind energy and light energy by first absorbing the active power output value of wind and water. The active power output value meets the set active power output demand value; however, this method does not consider the load characteristics of the receiving end, and takes the priority of absorbing wind and solar output as the objective function, and does not consider the damage of hydropower interests

In addition, there is also a global optimal position obtained by optimizing the computational efficiency of the intelligent algorithm as the optimal solution for the complementary scheduling of water, light and energy. However, this solution is more complicated and does not consider the load characteristics of the receiving end.

There is also a combination of cascade hydropower stations, pumped storage power stations, and photovoltaic power stations to promote the consumption and utilization of photovoltaic power generation. However, the cascade hydropower stations specifically refer to cascade hydropower stations composed of hydropower stations with daily (no) regulation capabilities. The load characteristics of the receiving end are not considered

[0004] The above power allocation is related to water-optical joint scheduling and output process allocation, and has not yet involved the output allocation method of water-optical joint scheduling that considers the load characteristics of the receiving end

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