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Simulation modeling method for AC-DC hybrid system containing high-proportion new energy

A technology of AC-DC hybrid and system simulation, applied in the field of power system, to achieve the effect of improving accuracy and practicability

Pending Publication Date: 2022-01-21
STATE GRID CHONGQING ELECTRIC POWER CO ELECTRIC POWER RES INST +2
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Problems solved by technology

[0006] The purpose of the present invention is to provide a simulation modeling method for an AC-DC hybrid system with a high proportion of new energy, so as to solve the problem that the traditional simulation modeling method cannot fully satisfy the accurate real-time drawing of the dynamic characteristics of the new energy power generation side and the DC transmission side question of needs

Method used

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  • Simulation modeling method for AC-DC hybrid system containing high-proportion new energy
  • Simulation modeling method for AC-DC hybrid system containing high-proportion new energy
  • Simulation modeling method for AC-DC hybrid system containing high-proportion new energy

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Embodiment

[0055] Such as Figure 2-4 As shown, a simulation modeling method for AC-DC hybrid system with a high proportion of new energy, which specifically includes the following steps:

[0056] S1: Construct a new equivalent model of MMC based on model-data hybrid drive;

[0057] The specific steps of constructing a new equivalent model of MMC based on model-data hybrid drive are as follows:

[0058] S11: PWM link data collection;

[0059] The PWM link data includes: the active and reactive physical quantity setting values ​​determined at the system level Q ref , and the measured signal V of the system fed back from the AC and DC sides dc ,Q,V d ,V q ,I d ,I q , the above signal is used as the input signal; in addition, the three-phase AC voltage d-q axis component V cd ,V cq as an output signal;

[0060] S12: data normalization;

[0061] The data normalization adopts the Z-score standardization method to normalize the original data, that is, the mean value and standard d...

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Abstract

The invention discloses a simulation modeling method for an AC-DC hybrid system containing high-proportion new energy. The simulation modeling method specifically comprises the following steps: S1, constructing a model-data hybrid driving-based MMC novel equivalent model; s2, constructing a new energy grid-connected system equivalent model based on data driving; s3, effectively fusing the MMC novel equivalent model based on model-data hybrid driving and the new energy grid-connected system equivalent model based on data driving to obtain a model-data hybrid driving-based AC / DC hybrid system simulation model containing high-proportion new energy; according to the method, accurate modeling of power system key components such as flexible direct current power transmission and a new energy unit is realized, the real operation state of the actual physical power grid is restored to the greatest extent, the accuracy and the practicability of the model are effectively improved, and a comprehensive, transparent and multi-level observation and deduction view angle is provided for monitoring and analysis of the operation state of the power grid.

Description

technical field [0001] The invention belongs to the technical field of power systems, and specifically relates to a simulation modeling method for an AC / DC hybrid system containing a high proportion of new energy based on a model-data hybrid drive. Background technique [0002] Based on the current situation and future planning of power grid development, my country's power system will present two important characteristics and development trends of a high proportion of new energy grid connection and AC / DC hybrid transmission for a relatively long period of time. On the one hand, the output of new energy units such as wind power and photovoltaics has inherent characteristics such as randomness and intermittency; on the other hand, the wide use of high-voltage and large-capacity power electronic The fault will further increase the time-varying, complex and uncertain operation mode of the power system, which will bring great challenges to the safe and stable operation of the pow...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/27H02J3/16H02J3/36G06F119/02
CPCH02J3/36H02J3/16G06F30/27G06F2119/02Y02E40/30Y02E60/60
Inventor 周敬森何永胜陈咏涛张友强宋伟朱晟毅余亚南向红吉肖强胡利宁周二专陈勇吴倩红
Owner STATE GRID CHONGQING ELECTRIC POWER CO ELECTRIC POWER RES INST
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