New energy consumption evaluation method based on minimum load shedding model

A new energy and load shedding technology, which is applied in the direction of AC network circuits, electrical components, single network parallel feeding arrangements, etc., can solve the problem of inability to accurately evaluate new energy consumption capacity, load shedding, and no system N-1 safety verification And other issues

Active Publication Date: 2019-09-10
YANGJIANG POWER SUPPLY BUREAU OF GUANGDONG POWER GRID +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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  • New energy consumption evaluation method based on minimum load shedding model
  • New energy consumption evaluation method based on minimum load shedding model
  • New energy consumption evaluation method based on minimum load shedding model

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0093] see figure 1 , a new energy consumption assessment method based on the minimum load shedding model, mainly includes the following steps:

[0094]1) Obtain the power system data in T years, and establish the expected failure set of power system N-1. The N-1 expected fault set is established according to the actual operation mode of the power grid. The N-1 expected fault set is the fault that occurs when the N-1 criterion of the power system cannot be satisfied. The N-1 criterion means that any component (such as lines, generators, transformers, etc.) in the power system under normal operation mode has no fault or is disconnected due to a fault, and the power system should be able to maintain stable operation and normal power supply, and other components should not load and the system voltage and frequency are within the allowable range.

[0095] 2) Considering the correlation of source-load power, the K-means clustering method is used to process the power system data,...

Embodiment 2

[0174] A new energy consumption evaluation method based on the minimum load shedding model mainly includes the following steps:

[0175] 1) Obtain the power system data in T years, and establish the expected failure set of power system N-1.

[0176] 2) Use the K-means clustering method to process the power system data, establish typical scenarios of power system operation, and calculate the probability of occurrence of each typical scenario.

[0177] 3) Optimal scheduling of hydropower stations in the power system, so that the power system can meet the constraints of normal operation under normal operating conditions.

[0178] 4) Establish a minimum load shedding model based on the N-1 expected fault set; input the power system data into the minimum load shedding model to obtain the expected value of the minimum load shedding, so that the power system can meet the fault state constraints under the N-1 expected fault state condition.

[0179] 5) Change the installed capacity ...

Embodiment 3

[0182] A new energy consumption evaluation method based on the minimum load shedding model, the main steps refer to Example 2, wherein the main steps of establishing a typical scenario of power system operation are as follows:

[0183] 1) Based on the power system data in T year, select the typical day of the power system in each season in T year, and set the power sampling point and sampling time of the typical day.

[0184] At each sampling moment, the power data sampling is carried out on the power sampling points of all typical days, the original data set is established, and the typical day is divided into three periods: peak, balance and trough.

[0185] 2) Based on sampling points, sampling time and original data sets, establish typical scenarios in three periods of typical intraday peak, balance and trough. The total number of typical scenes in a typical day N=T top +T lev +T low .

[0186] Each typical scenario is represented as follows:

[0187]

[0188] In th...

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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...

Claims

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Application Information

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IPC IPC(8): H02J3/00H02J3/48
CPCH02J3/00H02J3/48H02J2203/20
Inventor 谭涛亮任洲洋李震钱峰杨韵姜云鹏宋子强刘俊磊颜伟彭孝强吴明亮
Owner YANGJIANG POWER SUPPLY BUREAU OF GUANGDONG POWER GRID
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