Edition 4.0 2019-02
INTERNATIONAL STANDARD
Wind energy generation systems-Part 1: Design requirements
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Edition 4.0 2019-02
INTERNATIONAL STANDARD
Wind energygenerationsystems-Part 1:Designrequirements
CONTENTS
FOREWORD. 10INTRODUCTION. 12Scope 132 Norm ative references 133 Terms and definitions . 154 4.1 Symbols and abbreviated terms. Symbols and units. 23 234.2 Abbreviated terms. 265 Principal elements . 275.2 5.1 Design methods. General. 27 27Safety classes. 275.4 Quality assurance.. Wind turbine markings... 276 5.5 External conditions 27 286.1 General. 286.2 Wind turbine classes.. Wind conditions. 286.3 6.3.1 General 30 306.3.2 Normal wind conditions. 316.4 6.3.3 Other environmental conditions. Extreme wind conditions.. 336.4.1 General 386.4.2 Normal other environmental conditions 396.5 6.4.3 Electrical power network conditions.. Extreme other environmental conditions. 39 397 Structural design.. 407.1 General. 407.2 7.3 Design methodology.- Loads. 40 407.3.1 General 407.3.2 Gravitational and inertial loads 417.3.4 7.3.3 Aerodynamic loads. Actuation loads. 41 417.3.5 Other loads. 417.4 7.4.1 Design situations and load cases General. 41 417.4.2 Power production (DLC 1.1 to 1.5). 447.4.3 Power production plus occurrence of fault or loss of electrical network connection (DLC 2.1 to 2.5) 457.4.4 Start-up (DLC 3.1 to 3.3).. 477.4.5 Normal shutdown (DLC 4.1 to 4.2) 477.4.6 7.4.7 Parked (standstill or idling) (DLC 6.1 to 6.4).. Emergency stop (DLC 5.1). 48 487.4.8 Parked plus fault conditions (DLC 7.1) 497.4.9 Transport assembly maintenance and repair (DLC 8.1 and 8.2) 49
7.5 7.6 Load calculations.. Ultimate limit state analysis. 49 507.6.1 Method. 507.6.2 Ultimate strength analysis. 537.6.3 7.6.4 Fatigue failure. Stability. 56 577.6.5 Critical deflection analysis. 577.6.6 Control system Special partial safety factors. 588.1 General. 89 588.2 Control functions. 898.3 8.4 Protection functions. Control system failure analysis. 69 598.4.1 General 598.4.2 Independence and mon-cause failures. 608.4.3 8.4.4 Failure mode return periods Fault exclusions. 60 608.4.5 Systematic failures. 608.5 Emergency stop button function. Manual operation . 608.7 8.6 Manual automatic and remote restart. 61 608.8 Braking system . 629 Mechanical systems.. General. 629.2 9.1 Errors of fitting - 62 639.3 Hydraulic or pneumatic systems. 639.4 9.5 xoqe6 ujw Yaw system.. 9 99.6 Pitch system. 649.7 Protection function mechanical brakes. 6486 9.8.1 Rolling element bearings. . General 64 649.8.2 Main shaft bearings. 649.8.3 9.8.4 Pitch and yaw bearings. Generator bearings. 6410 Electrical system... 65 6510.1 General. 6510.2 10.3 General requirements for the electrical system... Intermal environmental conditions. 65 6510.4 Protective devices. 6710.5 Disconnection from supply sources. 6710.7 10.6 Lightning protection. Earth system . 67 6710.8 Electrical cables. 8910.9 Protection against lightning electromagnetic impulse.. Self-excitation 6810.11 10.10 Power quality. 89 8910.12 Electromagnetic patibility. 6910.13 Power electronic converter systems and equipment . 69
