Redundancy control protection system

A technology of control protection and protection system, applied in the direction of electrical components, circuit devices, etc., can solve the problems of increasing false trips in DC systems, prone to false actions, and low protection reliability, so as to reduce the risk of false trips and improve reliability. Effect

CN105529822AInactive Publication Date: 2016-04-27STATE GRID CORP OF CHINA +2
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2016-04-27
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a redundancy control protection system, which comprises a station level and a device level, wherein the device level comprises a bipolar control level, a unipolar control level and a converter valve control level; the station level, the unipolar control level and the converter valve control level are in communication connection sequentially; the station level is in communication connection with the bipolar control level; the output of the bipolar control level is in communication connection with the output of the converter valve control level; the station level is used for receiving a control command signal from an operator control system or a telecontrol system; the bipolar control level distributes transmission power for each converter transmission circuit according to an operation mode given by a dispatching center and a transmission power instruction; the unipolar control level realizes active and reactive power control targets required by the system; and the converter valve control level is used for receiving a control command from the unipolar control level and receiving information from the converter valve, thereby realizing control and protection functions on the converter valve. The system of the invention improves reliability of the DC protection work, and reduces the mistrip risk.
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Description

Technical field:

[0001] The present invention relates to a control and protection system, more specifically to a redundant control and protection system. Background technique:

[0002] In the power system, the control and protection system plays an extremely important role in the operation of the direct current transmission system. The failure or abnormal function of the control and protection equipment itself should not affect the operation of the DC transmission system, let alone lead to the outage of the DC transmission system.

[0003] Most of the existing DC control and protection systems at home and abroad adopt dual design. It is a relatively common configuration method for DC control systems to adopt dual redundant switching logic. It is recognized as effective, but its disadvantage is that it is prone to malfunction, which increases the risk of false tripping of the DC system, and the protection reliability is not high. Therefore, a redundant control and protectio...

Examples

Embodiment 1

[0029] Such as figure 1 As shown, the invention of this example is a redundant control and protection system, the system includes station level and equipment level; the equipment level includes bipolar control level, unipolar control level and converter valve control level; the station level stage, the unipolar control stage and the converter valve control stage are sequentially connected by communication; the station level is connected to the bipolar control stage by communication, and the output of the bipolar control stage is connected to the output of the converter valve control stage;

[0030] The station level is used to receive control command signals from the operator control system (OWS) or telecontrol system (GWS) to complete control and operation. All these control operations are designed with safe and reliable interlocking functions to ensure The normal operation of the system and equipment and the personal safety of operating personnel. The bipolar control level ...