Real scene-replaced ultra high voltage DC protection field test device

Abstract

The invention discloses a real scene-replaced ultra high voltage DC protection field test device, which comprises a human-computer interaction module, an ultra high voltage DC transmission project electromagnetic transient simulation module, a signal acquisition and processing module, a logic diagnosis module and a hardware interface module, wherein a user inputs operation configuration information corresponding to simulation requirements to the electromagnetic transient simulation module through the human-computer interaction module, the electromagnetic transient simulation module carries outcorresponding transient simulation through building an AC / DC primary circuit model and a DC control system equivalent model for the ultra high voltage DC transmission project, simulation data such aseach voltage, current, switch signals and operation states meeting the actual operation features of the ultra high voltage DC transmission project are obtained, and the data are transmitted to the signal acquisition and processing module; and the signal acquisition and processing module carried out corresponding processing on each piece of simulation data to obtain all external interface device signals needed by the ultra high voltage DC protection system, and the signals are outputted to a tested protection system; and a protection function logic diagnosis module carries out logic diagnosison the protection functions of the tested protection system according to protection function test requirements and action behavior signals of the tested protection system, and a logic diagnosis resultis outputted to the human-computer interaction module.

Description

technical field [0001] The invention relates to the technical field of inspection and testing of electric power system protection, in particular to a real-scene replacement type UHV DC protection on-site testing device. Background technique [0002] The UHV DC protection system can monitor various operating status parameters of converters, filters, DC lines and other equipment and areas in real time, and quickly protect all electrical equipment such as converter stations and DC transmission lines from electrical fault damage. The security guard of HVDC transmission system. The performance of the DC protection system largely determines the operating performance, safety and reliability of the UHV DC transmission system. In recent years, with the continuous acceleration of UHV DC transmission project construction and successive commissioning, the workload of commissioning and operation and maintenance of UHV DC protection systems has become increasingly heavy. [0003] Howeve...

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Problems solved by technology

[0003] However, at present, the UHV DC protection function can only be verified in detail through the digital dynamic closed-loop test in the laboratory; in the commissioning or operation and maintenance phase of the project site, the protection is mainly set or modified by the control protection software to activate the protection function , to check the correctness of the outlet circuit, and it is impossible to carry out a series of tests such as the single device debugging and the whole group test of the sub-system like the AC power grid protection equipment on site

Therefore, the current testing of the UHV DC protection system mainly has the following deficiencies: 1) There is a great security risk in setting data in the software, and the control is difficult; 2) The debugging is complicated and does not conform to the protection professional on-site debugging process. Difficult to intervene, relying too much on DC control and protection equipment manufacturers; 3) After the DC protection is standardized, it is not allowed to set data in the software; 4) After the control and protection program of the DC project is upgraded, it is impossible to verify whether the software modification is correct on site, posing potential safety hazards

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