New energy consumption evaluation method based on minimum load shedding model

Abstract

The invention discloses a new energy consumption evaluation method based on a minimum load shedding model. The method mainly comprises the following steps: 1) obtaining data of an electric power system within T years, and constructing an electric power system N-1 preconceive fault set; 2) building a typical operation scene of the electric power system; 3) performing optimized dispatching on a hydropower station of the electric power system, so that the power system can meet a normal operation constraint condition in a normal operation state; 4) inputting electric power system data into a minimum load shedding model to obtain an expected value of the minimum load reduction amount, so that the electric power system meets a fault state constraint condition under the N-1 preconceive fault state; 5) calculating to obtain a new energy penetration rate upper limit and a new energy consumption capacity; and 6) establishing a relation curve of the new energy penetration rate and the expected value of the minimum load reduction amount. The method is suitable for hydroelectric rich regions. According to the method in the invention, the power supply flexibility in the system is fully considered, the new energy consumption level is improved, and the new energy consumption capability of the system is accurately evaluated.

Description

technical field [0001] The invention relates to the technical field of new energy power systems, in particular to a new energy consumption evaluation method based on a minimum load shedding model. Background technique [0002] In recent years, new energy power generation has shown huge environmental and economic benefits, and my country's new energy has developed rapidly. In areas rich in water resources in southern my country, a certain scale of water storage hydropower stations has been established, which makes the system more flexible and can fully utilize the power supply flexibility in the system to achieve full consumption of a certain scale of new energy. However, the consumption of new energy refers to the rational use of various resources so that the system can efficiently use new energy on the premise of ensuring the safe and stable operation of the system. It can be seen that the consumption of new energy is still based on the safe and stable operation of the sys...

AI Technical Summary

Problems solved by technology

However, most of the existing studies on the evaluation of new energy consumption have simplified the operation model of hydropower stations. The reservoirs of storage-type hydropower stations may undertake other comprehensive tasks such as flood control, irrigation and water supply. Demand limits the generating capacity of the unit, so it is impossible to accurately evaluate the new energy consumption capacity of the system

In addition, most of the current research only considers the system under normal operating conditions, and does not perform N-1 security checks on the system

In actual operation, the system connected with new energy may experience load shedding in the expected failure state of N-1, which will affect the reliability of power supply

At present, there is a lack of a new energy consumption evaluation method that comprehensively considers the normal operating state of the system and the expected fault state of N-1.

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