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Safety measures in relay protection work are an important part of ensuring personal safety and work quality. Usually, after the site starts work, the person in charge of work is responsible for filling in the safety measures ticket, and then the on-site execution is carried out after review by the monitor or technician. When the on-site tasks are heavy and the time is extremely tight, the filling and review of the protection safety measures tickets may be considered inconsistency or omission. In addition, the work ability and work status of the person in charge of the work have a great impact on the quality of the safety measures. The work of the person in charge of the same nature may vary greatly. In order to improve the quality of safety measures, the format and filling of safety protection safety measures tickets are standardized, and the hidden dangers caused by human factors in safety measures are minimized. Chaohu Power Supply Company has formulated a ticket for typical safety measures for relay protection work. The following is a description of the specific implementation:

1 Types and formats of typical security measures tickets

The typical safety measures for relay protection can be divided into: protection device full (partial) inspection, protection device replacement, load measurement vector, high-frequency channel test, protection device inspection, etc.; : Busbar protection, transformer protection, line protection, fault recorder, low-cycle load shedding device, remote disconnect device, etc.; can be divided into: 330 ~ 500kV, 220kV, 110kV, 35kV, 10kV protection according to the voltage level. According to the above three types, the work of the same type of equipment of the same type can be included in the same typical safety measure ticket. The following is a typical safety measure ticket for the whole work of the 220kV main transformer PST-1200 protection device. Example: The format of the security measure ticket can be slightly modified according to the format of the new "Safety" (Electrical) Appendix 8 "Second Work Safety Measures Ticket", adding a reviewer signature column, when the guardian and the executor are performing and restoring security After the measure, the third person will repeat the inspection and sign the confirmation.

2 Typical security measures ticket content and execution procedures

2.1 The basic content of the typical measure ticket includes:

(1) Record the original state of the platen, air switch, changeover switch, current switching terminal, etc. before work in a tabular form.

(2) Open the corresponding outlet and joint jumper plate and do the corresponding measures to prevent the wrong output of the pressure plate.

(3) Short circuit and disconnect the corresponding AC current and voltage circuit.

(4) Disconnect the corresponding DC operating circuit terminal or air switch.

(5) Disconnect the corresponding signal circuit terminal or air switch.

(6) Interlock lines, interlock switches, and disconnection or corresponding measures associated with adjacent equipment.

2.2 The implementation procedure of the typical measure ticket:

(1) The work ticket is started, and the work permitr confesses the live parts and on-site safety measures.

(2) The person in charge of work shall modify and supplement the contents of the typical safety measures according to the actual operation of the site. The safety measures shall be checked to the specific terminal number.

(3) The safety ticket shall be executed after being audited by the monitor or technician. The person in charge of the work shall submit the work tasks and dangerous points to the members of the work class and explain the safety measures.

(4) The guardian shall be served by a person with high technical level and experience. The executor and the recovery person shall be served by the members of the work class, and shall be conducted in the order of the measure votes, and “√” shall be called item by item.

(5) After the implementation of the safety measures, the pilot project of this work will be started after review by the third party.

(6) After the end of the test, the method is the same as above, and all measures are restored to the pre-starting state and reviewed.

3 Application of typical security measures tickets

3.1 Improve the standardized operating system The typical safety measures for relay protection incorporate the control and prevention of on-site safety measures into the standardized operating system, improve the standardized operating system, and minimize the hidden dangers caused by human factors in the operation. It is the first in Anhui Power System.

3.2 Safety Benefits Significantly During the preparation of the typical safety measures ticket, the protection personnel are familiar with the protection drawings and the corresponding circuits. During the implementation process, we also compiled a secondary safety measures operation monitoring system to improve the safety awareness of the protection personnel. Controls the occurrence of habitual violations.

3.3 Improve the work efficiency Apply the typical measure ticket, save the time to fill out the measure ticket, improve the quality of the ticket for filling out the measure, and improve the work efficiency on the basis of ensuring safety.

4 Notes

4.1 The use of typical security measures is the same as the typical operation ticket of the operating unit. It only provides a reference and reference function. The actual work should be modified and supplemented according to the different conditions of the site. The security measures must be To indicate the specific terminal number.

4.2 Avoiding the human change measures during the execution process After the audit, in the process of implementation, the executor must strictly follow the order of the measures, and the guardian must strictly abide by the operation and supervision system, supervise the executor's operation steps, absolutely not Allow changes to security measures during execution. If there are special circumstances such as the on-site conditions that do not allow the measures to continue, the work should be stopped immediately, and the person in charge of the work should re-edit the safety measures and review the remaining measures.

4.3 Refusal review work After the executor and guardian have finished the operation, the reviewer must take up the responsibilities and do a good job of reviewing the work. The review work cannot be formalized to ensure the reliability of the safety measures. In summary, the typical safety measures for relay protection work are widely used as a standard ticket format in the field work, and the effect is good. The promotion of the use of such safety measures tickets can provide a new way of operation for power field work. The majority of readers share the same.