Method, system, equipment, and storage medium for detecting the steady-state operating range of a flexible straight system
A technology of steady-state operating range and detection method, applied in the direction of measuring devices, transportation and packaging, and measuring electrical variables, etc., can solve problems such as lack of support for simulation or actual operating data, full application of unfavorable overload capacity, and stay
Active Publication Date: 2021-11-30
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
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Problems solved by technology
[0010] However, the aforementioned analysis only theoretically obtains the output range of flexible DC active power and reactive power after the tap is fixed, and only stays at the level of theoretical analysis without the support of simulation or actual operating data.
This is because in practical applications, flexible DC systems usually have overload logic. In addition, even if the overcurrent capability of IBGT is weaker than that of thyristors, there will be a certain margin of flow capacity and short-term overcurrent capability in engineering design.
It can be seen that because the traditional scheme does not consider the overload logic, it is not conducive to accurately determine the steady-state operating range of the flexible straight system, and it is not conducive to fully utilizing the overload capacity
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[0079] The core of the present invention is to provide a method for detecting the steady-state operating range of the flexible direct current system, which can determine a more realistic steady-state operating range of the flexible direct current system and realize full application of the overload capacity.
[0080] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0081] Please refer to figure 2 , figure 2 It is an implementation flowchart of a method for detec...
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The invention discloses a method for detecting the steady-state operating range of a flexible direct current system, which includes: configuring the voltage sequence of the voltage on the side of the transformer network connected to the flexible direct current system; The constraints of the calculation equation include at least the constraints on the overload capacity of the flexible DC system and the constraints on the withstand voltage capacity of the primary equipment; based on the calculation equation of the steady-state operating range under the constraints, the flexible The DC system is tested for the steady-state operating range. Applying the scheme of this application, it is possible to determine the steady-state operating range of the flexible straight system that is more in line with the actual engineering, and to make a more accurate and practical evaluation of the output capacity of the active and reactive power of the flexible straight system. It is conducive to the full application of overload capacity. The application also discloses a detection system, equipment and storage medium for the steady-state operating range of the flexible straight system, which have corresponding effects.
Description
technical field [0001] The invention relates to the technical field of flexible straight system detection, in particular to a method, system, equipment and storage medium for detecting the steady-state operating range of a flexible straight system. Background technique [0002] Flexible DC transmission technology is the third-generation DC transmission technology based on voltage source converter technology. The converter element used is a bidirectional controllable power electronic device that can control both on and off. The typical representative is IGBT (Insulated Gate Bipolar Transistor, Insulated Gate Bipolar Transistor). Its development can be divided into two-level / three-level voltage source converters based on pulse width modulation theory and MMC (ModularMultilevel Converter, modular multilevel converter) based on ladder wave approximation. At this stage, MMC is the main Development trend, the flexible direct current system of this application is MMC. [0003] Th...
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IPC IPC(8): G01R31/08G01R21/00
CPCG01R21/002G01R21/003G01R31/086
Inventor 曾冠铭陈钦磊黄立滨林雪华郭琦罗炜
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD