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Power system modeling method and system, readable storage medium and server

A technology of power system and modeling method, applied in the direction of instruments, electrical digital data processing, special data processing applications, etc., can solve the problem that the performance of data-driven methods depends on data scale and quality, restricts applicable scenarios, and lacks knowledge and understanding of result interpretation To achieve the effect of breaking through the contradiction between complexity and accuracy

Pending Publication Date: 2022-03-04
CHINA ELECTRIC POWER RES INST
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such methods help to understand the characteristics of equipment and systems in historical operation by analyzing historical operation data, and support power grid operation situation awareness, assessment, and prediction; however, the performance of data-driven methods is highly dependent on the data Comprehension of knowledge and interpretation of results, the generalization ability of the model restricts the applicable scenarios

Method used

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  • Power system modeling method and system, readable storage medium and server
  • Power system modeling method and system, readable storage medium and server
  • Power system modeling method and system, readable storage medium and server

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Experimental program
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Effect test

Embodiment 1

[0054] see figure 1 , a power system modeling method according to an embodiment of the present invention, comprising the following steps:

[0055] S1. Construct a single device external characteristic model for mechanism data fusion based on the feedback fusion model;

[0056] S2. Connect each device according to the grid topology and line parameters to form a power system wiring diagram;

[0057] S3. Construct a power system model driven by mechanism data fusion based on the external characteristic model of a single device connected to each device in the power system wiring diagram;

[0058] S4. Use the fusion-driven power system model to perform system simulation and perform online updates based on real-time data.

[0059] Since the physical mechanism of the device is usually relatively clear, it is only necessary to modify the parameters in the mechanism-driven model with the data-driven model to better fit the difficult-to-express, nonlinear or uncertain parts of the dev...

Embodiment 2

[0086] A kind of power system modeling method of another embodiment of the present invention, comprises the following steps:

[0087] S1. Construct a single device external characteristic model for mechanism data fusion based on feedback fusion mode:

[0088] refer to figure 2 The feedback mechanism data fusion modeling process shown.

[0089] ①Taking the photovoltaic power generation system as an example to build a power supply model.

[0090] The electric energy generated by the series-parallel connection of photovoltaic cells is transmitted to the grid through the inverter and the corresponding filter, so the mechanism part of the external characteristic model of the entire photovoltaic power generation system should include the U-I characteristic model of photovoltaic cells, the equivalent of series-parallel connection of batteries, and the inverter controller control model, MPPT control model and numerical weather prediction data, etc. Based on the physical principle,...

Embodiment 3

[0110] see Image 6 , a power system modeling system according to an embodiment of the present invention, including a device external characteristic fusion drive modeling module 1, a wiring diagram construction module 2, a power system fusion drive modeling module 3, and a model update module 4, wherein:

[0111] Equipment external characteristic fusion drive modeling module 1, which is used to construct a single equipment external characteristic model for mechanism data fusion based on feedback fusion mode;

[0112] The wiring diagram construction module 2 is used to connect various devices according to the grid topology and line parameters to form a power system wiring diagram;

[0113] The power system fusion drive modeling module 3 is used to construct a fusion drive power system model based on the external characteristic model of a single device connected to each device in the power system wiring diagram;

[0114] The model update module 4 is used to perform system simul...

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Abstract

The invention discloses a power system modeling method and system, a readable storage medium and a server. The method comprises the following steps: constructing a single equipment external characteristic model based on a feedback fusion mode; connecting the devices according to the power grid topological structure and the line parameters to form a power system wiring diagram; constructing a power system model driven by mechanism data fusion based on a single equipment external characteristic model of connecting the equipment on the basis of the power system wiring diagram; and performing system simulation by using the fusion-driven power system model, and performing online updating according to real-time data. According to the method, rich physical knowledge accumulated in the development process of a power system and huge historical data accumulated due to digital construction of a power grid are fully utilized, the defects that a single modeling method is contradictory in complexity and accuracy, lacks interpretability and the like are overcome, and the real-time performance of the power grid can be improved through operation data collected by a sensor. The power simulation system in one-to-one correspondence with the physical entities is constructed, so that faults and problems existing in the physical system can be predicted and detected more quickly and more accurately.

Description

technical field [0001] The invention belongs to the technical field of power system simulation, and in particular relates to a power system modeling method, system, readable storage medium and server. Background technique [0002] Compared with the past, modern power systems have undergone tremendous changes in terms of power supply composition, grid scale, and load characteristics. With the access of renewable energy, the flexible use of active loads (such as electric vehicles, etc.), and large-scale regional interconnection, The power grid has evolved into a typical dynamic large-scale system with huge dimensions, which has stronger uncertainty, complexity and nonlinearity. In power system-related applications, analysis methods based on physical mechanism models have proven their effectiveness. Such methods can better adapt to changing application scenarios by analyzing problem mechanisms, extracting universal rules, and implementing control decisions. However, the mechan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06Q50/06G06F17/16G06F119/02
CPCG06F30/20G06F17/16G06Q50/06G06F2119/02
Inventor 赵紫璇乔骥王晓辉史梦洁韩富佳朱琼锋李家腾王嘉媛张宇熙张伯远贾健
Owner CHINA ELECTRIC POWER RES INST
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