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TB 097 1995 SC 14 WG 14.12 System tests for HVDC installations.

This guide is structured in eight parts and should give potential users guidance, regarding which course of action should be taken in planning commissioning activities. Structure of the tests and a brief statement of the purpose of the individual group of tests is presented. Commissioning an HVDC system is a very complex task which may affect more than the actual contract parties.

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TABLE OF CONTENTS

0 Executive Summary

1 General

      1.1 Statement of Purpose

      1.2 Structure of the HVDC System

      1.3 Structure of the Control and Protection System

      1.4 Logical Steps of Commissioning

      1.5 Structure of System Testing

2 Off-Site Tests

      2.1 Steady State Performance of the Controls

            2.1.1 Measurements

            2.1.2 Control and Protective Sequences

            2.1.3 Steady State Performance Tests

      2.2 Dynamic Performance Tests

            2.2.1 Controls-Step Responses

            2.2.2 Control Mode Transfer

            2.2.3 AC System interaction/Control

            2.2.4 Commutation Failures and Valve Misfires

            2.2.5 AC Filter, Transformer and Reactive Element Switching

            2.2.6 AC and DC System Faults

            2.2.7 lslanding

      2.3 Functional Performance Tests

      2.4 Type Tests on the Control and Protection Equipments

3 Converter Tests

      3.1 Converter Unit Tests

      3.2 Converter Station Tests

            3.2.1 HV Energization of AC Filters, Capacitor Banks and Shunt Reactors

            3.2.2 Open Line Test of the DC Switchyard

            3.3.3 Load Tests

      3.3 Open Line Tests on the DC Transmission Circuit

4 End-to-End-Tests

      4.1 Changing the DC System Configuration, Off Voltage

      4.2 Start and Stop Sequences and Steady State Operation at minimum Power

      4.3 Protective Blocking and Tripping Sequences

      4.4 Power and Current Ramping

      4.5 Reduced Voltage Operation

5 Steady-State Performance and interference Tests

      5.1 Harmonic Performance and Filter Components Rating

      5.2 Audible Noise

      5.3 Overload/Temperature Rise

      5.4 lnterference

      5.5 Earth Electrode

6 Operation and integration Tests

      6.1 Changes of DC Configuration

            6.1.1 Tests from Monopolar Metallic Return Operation

            6.1.2 Tests from Monopolar Earth Return Mode

            6.1.3 Tests from Bipolar Operation

      6.2 Control Performance

            6.2.1 Step Response

            6.2.2 Control Mode Transfer

            6.2.3 AC System interaction 1 Control

            6.2.4 Commutation Failure

      6.3 Switching AC Side Filters and Transformers

      6.4 Loading Tests

      6.5 AC and DC System Staged Fault Tests

      6.6 Loss of Telecommunications, Auxiliaries, or Redundant Equipment

            6.6.1 Loss of Telecommunications between Terminals

            6.6.2 Loss of Auxiliary Power Supplies

            6.6.3 Loss of Redundant! Equipment

7 Trial Operations

8 System Test Plan and Documentation

      8.1 Plant Documentation and Operating Manuals

      8.2 System Study Reports and Technical Specifications

      8.3 lnspection and Test Plan

      8.4 System Test Program

      8.5 Test Procedures for each Test

      8.6 Documentation of System Test Results

      8.7 Deviation Reports