5.6.11 Onshore Converter Station(s) operation 468. The maintenance regime for the converter station(s) would depend on the final design of the HVDC system. The design would incorporate extensive redundancies for cooling systems, duplicated control systems and power. This would allow most of the maintenance work to be done with no interruption to operation. Within the onshore converter site, there would be an area for storage of key components.
469. It is anticipated that the converter station will be staffed 24 hours a day by a minimal workforce (up to five full time personnel). In addition to the operational staff there would be the occasional maintenance visits. Within the onshore converter site, there would be an area for storage of key components. Storage for cable repairs may be at the O&M port or strategic location near the onshore cable route.
5.6.11.1 Noise levels 470. A major part of the equipment that generates noise is located inside the buildings, and this noise can be successfully attenuated by appropriately designed acoustic properties of the walls and roof. The station layout should also be adapted to fit acoustical requirements.
471. The rating level of operational noise emissions (including any relevant penalties for tonal or impulsive noise in accordance with section 8 of BS4142:1997) from the converter station (including transformers, air handling units and cooling fans) shall not exceed 35 dB LAeq, 5 min
at identified receptors.
472. To ensure that noise requirements are met, it would be necessary to design and construct the converter station correctly. The process of acoustic design of the plant includes the following steps;
Identify the noise requirements for the plant; Identify the real constraints for the noise design; Influence the layout design so that the noise requirements would be fulfilled;
Predict the expected noise level around the equipment used and the entire plant;
Decide the maximum permissible noise levels for the most significant pieces of equipment;
Decide the acoustic properties of the enclosures, buildings and expected attenuation screens; and
Preliminary Environmental Information May 2014
East Anglia THREE Offshore Windfarm
Chapter 5 Description of the Development Page 108
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52 |
Page 53 |
Page 54 |
Page 55 |
Page 56 |
Page 57 |
Page 58 |
Page 59 |
Page 60 |
Page 61 |
Page 62 |
Page 63 |
Page 64 |
Page 65 |
Page 66 |
Page 67 |
Page 68 |
Page 69 |
Page 70 |
Page 71 |
Page 72 |
Page 73 |
Page 74 |
Page 75 |
Page 76 |
Page 77 |
Page 78 |
Page 79 |
Page 80 |
Page 81 |
Page 82 |
Page 83 |
Page 84 |
Page 85 |
Page 86 |
Page 87 |
Page 88 |
Page 89 |
Page 90 |
Page 91 |
Page 92 |
Page 93 |
Page 94 |
Page 95 |
Page 96 |
Page 97 |
Page 98 |
Page 99 |
Page 100 |
Page 101 |
Page 102 |
Page 103 |
Page 104 |
Page 105 |
Page 106 |
Page 107 |
Page 108 |
Page 109 |
Page 110 |
Page 111 |
Page 112 |
Page 113 |
Page 114