A method and system for determining the frequency deviation of a power system for new energy frequency modulation
A power system and frequency deviation technology, which is applied in the field of determining the frequency deviation of the power system for frequency regulation of new energy, can solve the influence of the calculation of the steady-state frequency of the new energy power generation, the influence of the participation of the new energy in the system, and the proportion of the new energy power generation. Multi-frequency stability and other problems, to achieve the effect of simplifying the analysis and calculation difficulty, ensuring safety, and high engineering applicability
Active Publication Date: 2022-03-04
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 cannot 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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[0056] Referring now to the accompanying drawings, an exemplary embodiment of the present invention is described, however, the present invention can be implemented in many different forms, and is not limited to the embodiments described herein, and these embodiments are provided for detailed and fully disclosed The invention is sufficiently conveyed to those skilled in the art. The terminology representing the exemplary embodiment in the drawings is not limited to the present invention. In the drawings, the same unit / element is used in the same reference numerals.
[0057] Unless otherwise stated, the terms (including technological terms) used herein have a usual understanding of those skilled in the art. In addition, it will be understood that the terms defined by the commonly used dictionary should be understood to have a consistent meaning with the context of its related art, and should not be understood as ideal or too formal meaning.
[0058] The present invention proposes ...
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The invention discloses a method and a system for determining the frequency deviation of a power system for new energy frequency modulation, and belongs to the technical field of power system operation control. The method of the present invention includes: establishing a new energy generator stand-alone model and a synchronous generator stand-alone model according to the new energy electric power system; injecting power into the bus according to the new energy generator stand-alone model, and injecting electromagnetic power into the bus and the power system based on the synchronous generator stand-alone model The load absorbs the electromagnetic power to determine the proportion of new energy; determine the unbalanced power that the new energy stand-alone model can balance; determine the adjustment power that the synchronous generator stand-alone model needs to provide to balance the unbalanced power; determine the frequency deviation after power system power fluctuations. The invention can simplify the difficulty of analysis and calculation while ensuring the accuracy of the calculation results, has high engineering applicability, and can effectively guarantee the safe and stable operation of the power grid.
Description
Technical field [0001] The present invention relates to the field of power systems operating control technology, and more particularly to a method and system for determining the frequency deviation of the power system of new energy frequency modes. 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, and the electromechanical decoupling is achieved due to the addition of the converter control link, and the stability characteristics have changed. China's new energy power generation is gradually improved and will continue to increase. Large-scale new energy power generation replaces the traditional synchronous unit to generate changes in the frequency stability characteristics of power systems. After the increase in new energy power generation...
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IPC IPC(8): H02J3/48H02J3/24
CPCH02J3/48H02J3/24
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