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Method and system for determining maximum proportion of new energy of power system

A power system and new energy technology, applied in the parallel feeding arrangement of a single network, reducing/preventing power oscillation, etc., can solve problems such as frequency stability and prominent, the proportion of new energy power generation, and the upper limit of the proportion of new energy has not been considered. , to achieve the effect of simplifying analysis and calculation difficulty, high engineering applicability, and ensuring accuracy

Active Publication Date: 2020-03-24
CHINA ELECTRIC POWER RES INST +2
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Problems solved by technology

At present, there are methods to realize the fast calculation of the steady-state frequency of the power system after the disturbance, but none of the existing methods considers the impact of the access of new energy power generation on the calculation of the steady-state frequency, nor does it consider the impact of new energy on the steady-state frequency modulation of the system. The influence of frequency calculation, and the upper limit of the maximum proportion of new energy that can be accepted by the system when new energy participates in frequency regulation has not been considered
Unable to cope with and solve the practical problems that the proportion of new energy power generation in my country is increasing and the frequency stability is becoming more and more prominent

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  • Method and system for determining maximum proportion of new energy of power system

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[0053] Exemplary embodiments of the present invention will now be described with reference to the drawings; however, the present invention may be embodied in many different forms and are not limited to the embodiments described herein, which are provided for the purpose of exhaustively and completely disclosing the present invention. invention and fully convey the scope of the invention to those skilled in the art. The terms used in the exemplary embodiments shown in the drawings do not limit the present invention. In the figures, the same units / elements are given the same reference numerals.

[0054] Unless otherwise specified, the terms (including scientific and technical terms) used herein have the commonly understood meanings to those skilled in the art. In addition, it can be understood that terms defined by commonly used dictionaries should be understood to have consistent meanings in the context of their related fields, and should not be understood as idealized or over...

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Abstract

The invention discloses a method and system for determining the maximum proportion of new energy of a power system, and belongs to the technical field of power system operation control. The method comprises the following steps: establishing a stand-alone system model according to a new energy power system; determining relational expressions of injection power of the new energy generator single-machine model to the bus, injection electromagnetic power of the synchronous generator single-machine model to the bus, load absorption electromagnetic power of the power system and a new energy proportion; determining unbalanced power which can be balanced by the new energy generator single-machine model; adjusting power of balanced and unbalanced power needing to be provided by the synchronous generator single-machine model is determined; and determining the new energy proportion of the energy power system. The method can simplify the analysis and calculation difficulty while guaranteeing the accuracy of a calculation result, is higher in engineering applicability, and can effectively guarantee the safe and stable operation of a power grid.

Description

technical field [0001] The present invention relates to the technical field of power system operation control, and more specifically, to a method and system for determining the maximum proportion of new energy in a power system. Background technique [0002] The energy crisis has made people pay more and more attention to the research and utilization of new energy, and new energy power generation is the main way to use new energy. The new energy generator set is different from the traditional synchronous generator set. Due to the addition of the converter control link, the electromechanical decoupling has been realized, and its stability characteristics have changed. The proportion of new energy power generation in China is gradually increasing and will continue to increase. After large-scale new energy power generation replaces traditional synchronous unit power generation, it will cause changes in the frequency stability characteristics of the power system. After the pro...

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Application Information

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IPC IPC(8): H02J3/24H02J3/46H02J3/40
CPCH02J3/24H02J3/46H02J3/40
Inventor 汪梦军马士聪王铁柱张曦曾思成郭剑波赵兵王姗姗王天昊于光耀崇志强
Owner CHINA ELECTRIC POWER RES INST
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