Direct current power transmission engineering valve group overhauling automation isolation realization method

Abstract

The invention discloses a high voltage / extra-high voltage direct current power transmission engineering valve group overhauling automation isolation realization method. The method comprises the following steps of setting a valve group overhauling automation isolation starting button and acquiring a valve group overhauling signal, and transmitting the signal to an associated direct current control protection host; according to an overhauling-signal associated direct current control protection host, carrying out electrical isolation on an automatic operation overhauling valve group and an operation valve group; according to an overhauling-signal investment operation direct current control protection host, setting a collected overhauling valve group equipment state signal to be a set value; according to the overhauling-signal investment operation direct current control protection host, shielding the monitoring to the overhauling valve group equipment; according to the overhauling signal, forbidding a control protection host of the overhauling valve group to operate equipment used for electrical isolation; according to the overhauling signal, forbidding the investment operation direct current control protection host to operate the overhauling valve group equipment. Through one-key starting, safe isolation of the overhauling equipment is automatically completed and safe operation of direct current equipment is guaranteed.

Description

technical field [0001] The invention belongs to the field of high-voltage / ultra-high voltage direct-current transmission control, and in particular relates to a method for realizing automatic isolation of a valve group inspection and maintenance of a direct-current transmission project. Background technique [0002] As the world's first ±800kV UHV DC transmission project was put into official operation in China, UHV DC began to flourish. The connection structure of double 12-pulse valve groups in series makes the electrical wiring of the DC system and the structure of the DC control and protection system More complex, also makes the DC system have more operating modes, and the flexibility of operation is also greatly enhanced. The complex structure of the system, the variety and flexibility of the operation mode also bring the complexity of the maintenance of the high-voltage DC engineering valve group. [0003] During the operation and maintenance of the DC project, one or...

AI Technical Summary

Problems solved by technology

During the maintenance period, the status of the maintenance valve group equipment and the operation status of the valve group control and protection host are uncertain. These states will interfere with other operating equipment and cause unsafe operation. It is necessary to shield these monitoring and data exchanges, and disconnect the maintenance equipment from the operating system. coupling

[0005] In the past, during the maintenance of DC projects, the isolation and connection prohibition of maintenance valve groups, and the shielding of monitoring and data exchange between hosts were all realized by the inspection personnel through manual judgment and temporary settings, and no automatic isolation method has yet appeared.

With the increasing complexity of the system, it is more and more difficult for the inspection personnel to judge and take measures, and the safety during maintenance is getting lower and lower. Method of Automatic Isolation for Overhaul of Engineering Valve Group

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