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New energy station modeling method and device, terminal and storage medium

A modeling method and new energy technology, applied in resources, wind power generation, design optimization/simulation, etc., can solve problems such as incomplete data, low modeling efficiency, and huge equivalent workload, and achieve the effect of reducing computing resources

Pending Publication Date: 2022-08-09
CHINA ELECTRIC POWER RES INST +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this equivalent method requires a huge amount of data and equivalent workload, and the modeling efficiency is relatively low. In addition, in the simulation scenario of large-scale new energy stations, for the stock new energy stations with a long operation time, Its data may be incomplete or change greatly. For newly built stations, the operating data is less, and accurate parameter identification cannot be carried out. For planned stations, there is no detailed equipment data for equivalent
Therefore, this equivalent method is only suitable for new energy station modeling with known detailed parameters of individual equipment, and its scope of application is limited

Method used

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  • New energy station modeling method and device, terminal and storage medium
  • New energy station modeling method and device, terminal and storage medium
  • New energy station modeling method and device, terminal and storage medium

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Embodiment 1

[0048] refer to figure 1 , the embodiment of the present application provides a new energy power station modeling method, including:

[0049] Step S100: Equating all units in the new energy station as a total equivalent unit.

[0050] In order to reduce the amount of calculation required, the coefficients involved in the calculation in the new energy station are divided into six types, and the calculation is carried out separately. The formula is as follows:

[0051]

[0052] Among them, S represents the capacity of the unit / box, H represents the rotor inertia time constant of the wind turbine and generator, K represents the shaft stiffness coefficient, R represents the main circuit / box resistance, L represents the inductance, C represents the main circuit capacitance, The subscript m represents the aggregated equivalent units, the subscript s represents a single unit, and n is the number of new energy units in the station.

[0053] The above six parameters that need to be ...

Embodiment 2

[0115] In order to verify the effect of this application, a detailed model of a large photovoltaic station, a direct aggregation equivalent model and a typical convergent line parameter equivalent model have been built on the power system digital-analog hybrid simulation platform of the State Grid Simulation Center, and simulation tests have been carried out. And the steady-state and transient characteristics of the model are compared.

[0116]The PV station parameters are shown in Table 2. All photovoltaic units have the same type and parameters, and are connected to the 35kV power grid after 8 collection lines are connected in parallel. For the unit stand-alone model, a typical unit model consistent with the on-site operating characteristics is used. For the unit equivalent model, the capacity-weighted aggregate equivalence is performed based on the unit stand-alone model and the capacity of each unit. The line type is a mixture of cables and overhead lines, so the equivale...

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Abstract

The invention discloses a new energy station modeling method, and discloses equipment with the new energy station modeling method, a storage medium and a collection line equivalent parameter, and the new energy station modeling method comprises the following steps: carrying out equivalent loss principle-based equivalence on a plurality of domestic new energy station collection line systems; and calculating an average value of equivalent collection line parameters of each type of collection line system to obtain typical collection line equivalent parameters of different types of collection line systems, and establishing a new energy station model suitable for large power grid digital-analog hybrid real-time simulation in combination with a unit equivalent model based on capacity weighting. Compared with a detailed model, computing resources can be greatly saved, and compared with a direct aggregation equivalent model, simulation accuracy can be greatly improved. By means of the method, the problem that in digital-analog hybrid real-time simulation of a large power grid containing high-proportion new energy, a large-scale new energy field station model cannot give consideration to the real-time performance and the accuracy at the same time is solved.

Description

technical field [0001] The invention relates to the field of digital-analog hybrid real-time simulation, in particular to a new energy field station modeling method, equipment, terminal and storage medium. Background technique [0002] Compared with conventional power sources, new energy power generation units have small capacity, large quantity, scattered distribution points, and have obvious intermittent, fluctuating and random characteristics. With the large-scale development of new energy sources, high proportion of grid connection, and the large-scale application of power electronic equipment, the technical basis, control basis and operation mechanism of the power system will undergo profound changes, and power balance, safety and stability control will face unprecedented challenges. , it is urgent to study the new power system in depth by means of simulation, and find and solve the difficulties and problems brought by large-scale new energy integration into the power g...

Claims

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Application Information

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IPC IPC(8): G06F30/20G06Q10/06G06Q50/06G06F113/04
CPCG06F30/20G06Q10/06312G06Q50/06G06F2113/04Y02E60/00
Inventor 庞广恒朱艺颖刘翀王薇薇刘琳雷霄林少伯刘世成赵志华杨尚瑾李新年杨立敏吴娅妮胡涛谢国平王晶芳张晓丽李跃婷张晋华刘浩芳许锐文付小倍贺郁文李潇潇陈晨曦
Owner CHINA ELECTRIC POWER RES INST