scope:

This standard specifies the basic principles, contents, methods, performance indicators, and acceptance requirements for scheduled maintenance and testing of distributed control systems.

This standard applies to the maintenance and testing of distributed control systems (DCSs) of conventional thermal power plant in commercial operation. Reference may be made to this standard for factory acceptance tests, installation, commissioning, and site acceptance tests of DCSs of other types of power plants or DCS before commercial operation.

Purpose

This standard, based on the engineering principles, methods, practices, procedures, and field experience which have been demonstrated in many power plants, specifies the details, methods, and technical requirements of maintenance and tests after the technical modification or temporary or scheduled maintenance of a DCS of a thermal power plant. The standard aims to standardize maintenance and inspection, performance test, functional test, and acceptance of DCS, to provide guidance and basis for instrument and control (I&C) personnel of power plants to confirm DCS maintenance and test quality, and to eliminate defects impairing the operational reliability of units after maintenance and test.