Multi-type power supply joint operation system assembly ratio calculation method

Abstract

The present invention discloses a multi-type power supply joint operation system assembly ratio calculation method which comprises the steps of (A) measuring wind speed data and solar data of a whole year, (B) designing an assembly ratio scheme and establishing a force output value change simulation curve, (C) verifying the stability of the assembly ratio scheme, continuing verification if a total force output value can be stable, recording a threshold-crossing time if the total force output value decreases, and abandoning wind amount or light amount if the total force output value increases, (D) counting the threshold-crossing time, the wind abandoned amount or light abandoned amount in the whole year, and (E) verifying other schemes to select a best scheme. According to the method, the assembly ratio of maximum wind power generation and photovoltaic power generation on the basis of ensuring system frequency stability can be calculated.

Description

Technical field [0001] The invention relates to a method for calculating the ratio of installed power, in particular to a method for calculating the best ratio of installed power for combined operation of multiple types of power sources. Background technique [0002] my country's energy resources are mainly concentrated in the western region, and the load center is concentrated in the central and eastern regions, and power consumption shows a pattern of power transmission from west to east. The wind power, photovoltaic and other renewable energy bases in the northwest are basically the same as the large thermal power bases. Long-distance inter-regional power transmission channels can be used to realize the joint operation of renewable energy and conventional energy power, which is bundled and sent to the load center. In this type of power system with multiple power sources, the output of conventional power sources such as thermal power generation and water storage power generatio...

AI Technical Summary

Problems solved by technology

The output change rate boundary of 10% per minute based on the existing calculation method is not realistic

Second, the frequency of the power system is a value that changes in real time around 50 Hz. As long as the upper and lower limits of the frequency change are met, the system frequency stability can be guaranteed. The existing calculation methods do not consider frequency fluctuations to ensure the frequency The calculation model is established on the basis of constant value, and the installed ratio is calculated, and the model setting does not conform to reality

[0004] The use of existing calculation methods to calculate the proportion of various power installations in large energy bases has seriously restricted the development of new energy and caused waste of renewable energy; at the same time, large-scale thermal power development and construction will inevitably pollute the local environment

The scale of thermal power far exceeds the installed capacity of renewable energy, which is not in line with the development strategy of vigorously developing renewable energy

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