Converter overheating protection method and device
An overheating protection and converter technology, applied in emergency protection circuit devices, automatic disconnection emergency protection devices, and protection that responds to overcurrents, etc. Utilize and lack the quantitative analysis of the calorific value of the converter and the study of the superheating capacity, etc., to achieve the effect of accurate quantitative analysis and improved operation efficiency
Pending Publication Date: 2022-05-13
NORTH CHINA ELECTRICAL POWER RES INST +2
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Problems solved by technology
However, in the actual operation process, affected by various external factors, the source of heat generation of the converter is complicated
[0003] In the prior art, the judgment of inverter trip due to overload and heat is mainly based on the magnitude of load current and voltage and overload time to indirectly judge whether the inverter is seriously overheated, and then take protective measures for the inverter to prevent the inverter from being overheated. Due to the lack of quantitative analysis of the heat generation of the converter and research on the overheating capacity, the evaluation of the overheating capacity of the converter is not accurate, so it is impossible to efficiently use the capacity of the converter to withstand the overload and convert the new energy Maximize operating benefits of unit converter
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[0059] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.
[0060] The execution subject of the method for overheating protection of the converter provided in the embodiment of the present invention includes but is not limited to a computer.
[0061] figure 1 It is a schematic flow chart of a method for overheating protection of a converter provided by an embodiment of the present invention, as shown in figure 1 As shown, the converter overheat protec...
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The invention provides a converter overheating protection method and device. The method comprises the following steps: acquiring a current value of a converter; if it is judged that the current value of the converter is larger than an overload current protection starting value, an overload current per unit value of the converter is obtained; performing accumulation calculation on heat generated by the converter based on the overload current per unit value of the converter and a heat accumulation calculation formula to obtain current heat accumulation of the converter; if it is judged that the current heat accumulation of the converter is larger than the optimal protection action constant value, overload current protection is started to carry out overheating protection on the converter; wherein the optimal protection action constant value is obtained in advance. The device is used for executing the method. According to the converter overheating protection method and device provided by the embodiment of the invention, the operation benefit of the converter of a new energy unit is improved.
Description
technical field [0001] The invention relates to the technical field of relay protection, in particular to a method and device for overheating protection of a converter. Background technique [0002] The converter is an important part of the grid-connected power generation of the new energy generator set. When the converter is in overload operation, the converter will overheat seriously. In the case of overload, use the converter as safely as possible. By utilizing the capacity of the converter to withstand overload, the operating efficiency of the converter of the new energy unit can be improved. However, in the actual operation process, affected by various external factors, the sources of heat generation in the converter are complicated. [0003] In the prior art, the judgment of inverter trip due to overload and heat is mainly based on the magnitude of load current and voltage and overload time to indirectly judge whether the inverter is seriously overheated, and then tak...
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IPC IPC(8): H02H7/12H02H5/04H02H3/08
CPCH02H7/12H02H5/041H02H3/08
Inventor 龚超张扬帆王耀涵张瑞芳吴宇辉邓晓洋程雪坤
Owner NORTH CHINA ELECTRICAL POWER RES INST