Overvoltage protection method and device for half-wavelength AC transmission dynamic simulation system
A dynamic and simulation system technology for power transmission, applied in the field of power system simulation and simulation, can solve problems such as increased operating voltage and high overvoltage, and achieve the effects of improving efficiency, simple and reliable methods, and protecting safe and stable operation
Active Publication Date: 2022-07-01
CHINA ELECTRIC POWER RES INST +2
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Problems solved by technology
However, since half-wavelength AC transmission lines have some completely different characteristics from ordinary long lines, the overvoltage characteristics of half-wavelength lines are quite different from those of conventional lines. If no measures are taken, high overvoltages will be generated in the case of ground faults. Increased transmission power during normal operation will also cause an increase in operating voltage
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[0030] Embodiments of the present invention are further described below in conjunction with the accompanying drawings:
[0031] like figure 1 As shown, in order to achieve the above object, the method provided by the invention adopts the following technical solutions:
[0032] Collect the voltage of the protected position in the half-wavelength AC transmission dynamic simulation system;
[0033] Based on the preset two-stage overvoltage protection setting principle, set the two-stage overvoltage protection setting value;
[0034] Based on the two-stage overvoltage protection setting and the voltage of the protected position, the overvoltage protection strategy is implemented.
[0035] like figure 2 As shown, the half-wavelength AC transmission dynamic simulation system may include: 3G, 4G, 6G, 11G four generator sets, equivalent generator set physical simulation unit, infinite system physical simulation unit 3W, transformer physical simulation unit 12FB, half-wavelength AC...
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The invention provides an overvoltage protection method and device for a half-wavelength AC power transmission dynamic simulation system, including: collecting the voltage of a protected position in the half-wavelength AC power transmission dynamic simulation system; based on a preset two-stage overvoltage protection setting principle, Set the two-stage overvoltage protection setting; implement the overvoltage protection strategy based on the two-stage overvoltage protection setting and the voltage of the protected position. The two-stage overvoltage protection method adopted in the present invention can prevent the overvoltage occurring in the half-wavelength dynamic simulation test process from damaging the simulation element equipment, and avoid the MOA leakage time being too long, and protect the MOA from being broken down.
Description
technical field [0001] The invention relates to the field of power system simulation, in particular to an overvoltage protection method and device for a half-wavelength AC transmission dynamic simulation system. Background technique [0002] As we all know, due to the unbalanced distribution of resources, the power supply area and the power consumption area are often far apart. In order to better solve the problem of uneven energy distribution, it is necessary to solve the problems of ultra-long distance and ultra-large transmission capacity. [0003] In recent years, with the continuous increase of electricity demand, ultra-long-distance and ultra-high-power electric energy transmission technology and its implementation have significant economic significance and practical value worldwide, and have become an important direction for the development of electric power in the world. Half-wavelength AC transmission technology refers to a three-phase AC transmission technology who...
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IPC IPC(8): H02H7/26H02H3/00
Inventor 詹荣荣余越孟江雯詹智华郄鑫李岩军周春霞陈争光李连海刘龙浩王成
Owner CHINA ELECTRIC POWER RES INST