Part A - EIA 400 kV OHTL Stp - Ð¼ÐµÐ¿ÑÐ¾ Ð°.Ð´.

More documents

Recommendations

Info

Environmental Impact Assessment Study for 400 kV OHL SS Stip – Macedonian-Serbian BorderThe basic technical paramteres of the transmission line are presented in the following table:Table – Review of technical parameters of the 400 kV interconnection transmission lineParameterCharacteristicNominal voltage 400 kVType of towers Steel-bar hot zinc-coated, with horizontally placed conductors, two per phaseand two protective wiresFoundationTypical solutions, depending on the engineering and geo-mechanicalparameters of the ground.Reinforced concrete - brand of concrete acording to the valid regulations.Protection against corrosion of anchor segment, 50 cm above the level of theterrain.Conductor √ Number per phases: 2√ Material: AlFe√ Section: 490/65 mm 2Protective wire√ Maximum work strain: According to valid regulationsTwo earth-lead wires in horizontal lowland:• First: Alumoweld hawser with diameter of 126.1 mm 2 , labeled AWG 19/9• Second: Protective hawser with optic fiber, OPGW with 48 fibers(Mechanical and electric characteristics will correspond to classic protectivehawser)Insulators • Type of insulator:- On the line: Phase, massive, porcelain insulator of the type75/21+20=160 or glass hanging insulators U-160- On the portal: Glass hanging, of the type U-160• Type of insulator chain: According to the regulationsEarthing of towers • Specific resistance of the ground: According to the terrain measurementsof specific places and use of typical earthing• Material: Circular zinc-coated steel• Dimensions: Minimum diameter ∅10 mmConnective equipment Connective materials for the planned insulators are hot zinc-coated.Climate parameters √ Wind pressure: 75 daN/m 2√ Burden from ice and snow: 1,6 x 0,18√d daN/m 2√ External temperature:- Maximum + 40 °С- Minimum - 20 °СSafety hightAt least 1 m higher than the prescribed in the Regulation, as a result oftiredness of the materials, intensive construction of near-by facilities, use ofagricultural machinery, etc.2.3.1 TowersAccording to the current concept in Macedonia, all single 400 kV power transmission lineshave been constructed by connecting two conductors per phase and symetrically positionedcables. Prusuant to the aforementioned and based on the practices and experience to date,400 kV transmission lines are constructed of steel bars hot zinc-coated with horizontallyplaced conductors and protective wires in the form of the letter "Y”. This means that thetowers for the 400 kV cross-border transmission line between Macedonian and Serbia willmeet the following basic technical and technological conditions:43
Environmental Impact Assessment Study for 400 kV OHL SS Stip – Macedonian-Serbian Border• One system• Horizontal connection of two conductors per phase• Two symmetrically positioned protective wires• Steel-bar hot zinc-coated construction• Use of insulator chain with glass / porcelain insulation units• Persistant in various climate conditions• Esthetically acceptable profile with good height - width rationIn addition to the aforementioned, the basic height of each type of tower must also meet thefollowing conditions:oooooall working conditionsaverage spanrequirements for safe distances and heightlimited tension phase conductors and protective wiresallowed (anticipated) non-elastic stretching of phase conductorsThe electric design of the “heads” of the towers and the established safe distances mustensure safe operation in all working climate conditions, in relation to the used phaseconductors, protective wires and insulator chains and for the designed, average andgravitation spans.The static calculation and dimensioning of towers must be made based on the theory ofelasticity for spatial constructions, in compliance with the accepted methodology for theprescribed single and combined common and additional loads and relevant safetycoeficients.In order to ensure easier and safer operation of the authorized personnel during theconstrction and installation of equipment, as well as during the activities for maintenance,stairs must be placed on both forks of the tower.The standard marking of the overhead power transmission line includes the following:• Warning table and signs in the appropriate form• Tables for marking of the phases with designations 0,4 or 8 that are positioned on theangle-tension towers, above the phase conductors according to the defined order.• Tables for noticing from air with the tower number, which are set at one of the twopeaks.In addition to these standards, with the aim of increasing the visibility of the power line bothduring the day and night, it is necessary to mark it in defined places (painting the towers inwhite colour and red strips, establishing signal balls on the protection wires and installation of"Balisor" lighting balls on the phase conductors.44
Page 1 and 2: The European Union's CARDS Programm
Page 5 and 6: Environmental Impact Assessment Stu
Page 7: Environmental Impact Assessment Stu
Page 20: Environmental Impact Assessment Stu
Page 94 and 95:
Environmental Impact Assessment Stu
Page 96 and 97:
Page 98 and 99:
Page 100 and 101:
Page 102 and 103:
Page 104 and 105:
Page 106 and 107:
Page 108 and 109:
Page 110 and 111:
Page 112 and 113:
Page 114 and 115:
Page 116 and 117:
Page 118 and 119:
Page 120 and 121:
Page 122 and 123:
Page 124 and 125:
Page 126 and 127:
Page 128 and 129:
Page 130 and 131:
Page 132 and 133:
Page 134 and 135:
Page 136 and 137:
Page 138 and 139:
Page 140 and 141:
Page 142 and 143:
Page 144 and 145:
Page 146 and 147:
Page 148 and 149:
Page 150 and 151:
Page 152 and 153:
Page 154 and 155:
show all

Part A - EIA 400 kV OHTL Stp - Ð¼ÐµÐ¿ÑÐ¾ Ð°.Ð´.

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?

Part A - EIA 400 kV OHTL Stp - Ð¼ÐµÐ¿ÑÐ¾ Ð°.Ð´.