A Method and System for Predicting Electromagnetic Interference of UHV Converter Station
A technology of electromagnetic interference and converter stations, applied in the field of electric power, can solve problems such as heavy workload, incomplete measurement and time-consuming
Inactive Publication Date: 2019-04-26
STATE GRID EAST INNER MONGOLIA ELECTRIC POWER CO LTD MAINTENANCE BRANCH +1
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Problems solved by technology
However, the measurement of the electromagnetic environment of the converter station can only be carried out during the maintenance of the converter station. The workload is heavy and time-consuming, and the measurement situation is not comprehensive. Electromagnetic level is very necessary
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[0104] The technical solution of the present invention will be described in detail below in conjunction with the drawings and embodiments.
[0105] In the general model building process, because the equipment is in a complex electromagnetic environment, the lumped parameter model in the traditional sense alone cannot reflect the broadband characteristics of the equipment, which will make the calculation results inaccurate. The invention provides a method for predicting electromagnetic interference in UHV converter stations, which calculates electromagnetic interference based on the establishment of equivalent circuits, and also includes measurement of node impedance, establishment of equivalent circuits, calculation of transient currents, and any location of UHV converter stations For the calculation of electromagnetic interference, the node impedance is a frequency domain function, which breaks the limitation of centralized parameters and reflects the characteristics of the eq...
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The invention provides an extra-high voltage converter station electromagnetic interference prediction method and system. The extra-high voltage converter station electromagnetic interference prediction method includes the following steps that: node impedance models of devices in an extra-high voltage converter station are established according to the basic information of the devices in the extra-high voltage converter station; based on the node impedance models of the devices, an equivalent circuit is established according to the connection conditions of the devices in the extra-high voltage converter station; the pre-switching-on voltage of a converter valve is obtained, voltage step processing is performed on the pre-switching-on voltage, transient current generated due to the switching on of the converter valve is determined according to the result of the voltage step processing on the pre-switching-on voltage of the converter valve; and calculation of electromagnetic interference at any position of the extra-high voltage converter station, is calculated, wherein the electromagnetic interference includes the electromagnetic interference of current carrying elements in the directions of the axes of a measured point, and therefore, the electric field intensity of the converter station can be obtained, electromagnetic interference can be calculated. The prediction for the electromagnetic interference of the extra-high voltage converter station is of great significance for actual filtering scheme formulation of a power system.
Description
technical field [0001] The invention belongs to the field of electric power technology, and relates to a technical scheme for predicting the electromagnetic environment of an UHV converter station, in particular to a method and system for predicting electromagnetic interference of an UHV converter station. Background technique [0002] UHV converter stations (generally above ±800kv) play an important role in the process of large-capacity energy transmission and linking. According to the overall plan of the State Grid Corporation of China, in 2015, we will strive to start construction of the "five-way and eight-direction" UHV project. This means that 13 UHV lines will be included in the construction catalog next year. The electromagnetic environment of the HVDC converter station is different from that of the AC substation and also more complicated than that of the AC substation. Due to the sudden change in voltage generated by the on and off of the converter valve, the radio...
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IPC IPC(8): G06F17/10G06Q10/04G06Q50/06
CPCG06Q10/04G06Q50/06
Inventor 罗汉武陶鑫周路焱李猛克崔士刚
Owner STATE GRID EAST INNER MONGOLIA ELECTRIC POWER CO LTD MAINTENANCE BRANCH