A method for calculating the participating power balance capacity of a photothermal unit

Abstract

The invention provides a method for calculating the participating power balance capacity of a photothermal unit. This method statistically analyzes the output characteristics of photothermal history and determines the power balance capacity of photothermal installed machine participating in the system. First, 8760 historical years of photovoltaic power plant time-by-time resource size are collected. Secondly, a linear optimization model is established, which brings in the light resource data and the parameters of the heat storage tank, solves the daily guaranteed heat of the power station in each historical year, takes a value under the guaranteed rate level as the daily guaranteed heat of the power station, and calculates and forms the heat storage regulation factor table; through query of the heat storage regulating factors, the daily guaranteed heat of each power station can be obtained. Finally, the daily guaranteed heat of each power station is brought into the model to solve thepower output of the photothermal power station, and the power balance capacity of the photothermal units in the system is obtained. The method can be used to calculate the capacity of the photothermalunit to participate in the power balance, and is suitable for the evaluation of the adequacy of the system power supply installation scheme and the scheduling of the dispatching mode.

Description

technical field [0001] The invention relates to the field of power system planning and operation scheduling, in particular to a method for calculating the participating power balance capacity of a photothermal unit. Background technique [0002] Concentrating solar power technology (concentrating solar power, CSP, CSP for short), as another major solar energy utilization method besides photovoltaic power generation, is gradually affecting the solar industry structure dominated by photovoltaic power generation. Photothermal power plants have developed rapidly in recent years, and the installed capacity has continued to expand. According to the economy of the power station itself, its design is often equipped with a large heat storage device, which can translate the absorbed solar thermal energy and has the ability to adjust across the day, so that the solar thermal unit has the ability to replace the load of the conventional unit. However, light resources are volatile and ra...

AI Technical Summary

Problems solved by technology

However, light resources are volatile and random, and solar thermal power stations do not start to operate on days with poor light resources; even, they may encounter situations where the output of the power station is zero for many consecutive days

How to determine the capacity of CSP units participating in the power balance of the system, there is no clear method at present, which poses a huge challenge for planners to evaluate the adequacy level of system installed capacity

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