Electrification of mining production

Contents

Introduction

Determination of design loads on GPP

Selection of transformers on the GPP

Duration of electric receivers loading during 24 hours

Daily schedule of active power at GPP

Daily schedule of reactive power at GPP

Selection of GPP location on the enterprise master plan

Main Downgrade Substation Diagram

Determination of VL voltage value from RPP to GPP

Selection of sections of VL-35 wires from RPP to GPP

Selection and check of VL-6 kV section and cable for excavator power supply

ASH 10.

Select Flexible Cable for Drilling Machine

Calculation of short-circuit currents in the 6 kV network

Calculation of earthing network in the area

Reactive power compensation

Calculation of road lighting

Determine the cost of electricity and key figures

power consumption

Conclusion

List of sources used

Introduction

(sample, injections should all have different)

Open-pit mining is more efficient than underground mining. For development, powerful overburden excavators ESh10.70, mining ECG8U, drilling machines SBSH250MN are used.

According to the task, it is necessary to determine the design power of the GPP during the operation of the open excavator ESh10.70, the production ECG8U, the drilling machine SBSH250MN. At an industrial site the RN water-removing installation = 400 kW is established, to ABK with PH=500 of kW, fur. workshop with PH=200 of kW and concentrating factory with PH=5000 of kW. It is required to determine the center of electrical loads by the specified coordinates: mountain section x = 1.0, y = 4.5, SPAC = 2123 KVA; industrial sites x = 4.5, y = 0.75, SPAC = 902 KVA; concentration plant x = 6.5, y = 0.75, SPAC = 3500 kVA.

The MPP is powered from the district lowering substation (RPP) located at a distance of 20 km. Short-circuit power at RPP SCZ = 500 MVA. Annual productivity of quarry A = 1.5 million tons.

Adopt modern electrical equipment at the GPP. Calculations shall be performed according to PUE, PTEEP, POTEE regulatory documents.

Conclusion

(sample, also everyone should have their own)

Based on the initial data of the task for heading work, the design electrical loads on the MPP are determined. They amounted to: for the mountainous section, ΟP = 2102 kW; for an industrial site ΣР = 660 kW; for concentrating factory ΣР = 3500 kW. In total on GPP ΣРРАС = 6262 kW, QPAC = 2925 quar. Total power SPAC = 6912 kVA. Two TMN6300 power transformers SH = 6300 kVA each are accepted. Transformer load factor in nominal mode β = 0.55.

Losses of active power in the transformer TMN6300 at loading β = 0.55 amounted to ΔP1 = 22.07 kW. Annual power losses in one transformer ΔW1G = 140430 kWh, in two transformers ΔWTP.G = 280860 kWh .

Daily schedules of the active load on the GPP have been compiled. Average daily active power PSR = 4997 kW. Daily consumption of active power WCYT = 119.93 thousand kWh. Morning maximum of RMAH = 2442 kW, evening RMAH = 5713 kW. The stated RZ.MAH enterprise capacity = 5713 kW .

Daily schedules of reactive load on GPP are compiled. Average daily reactive power QCP = 2364.4 q.

Coordinates of electrical load center location are determined: CC = 4.67 km, CC = 1.86 km.

The GPP diagram with modern equipment is presented: vacuum switches with voltage of 35 and 6 kV, OPN voltage limiters, TMG 6/0.4 kV sealed transformers.

Voltage VL35 kV is determined, AC70/11 wires are calculated and selected. Power losses in two circuits VL35 ΔP35 = 159.9 kV and power losses ΔW35 = 799500 kWh are determined. Voltage loss in VL35 kV was ΔU% = 2.46%.

Wires of VL6 of kV of A70 brand for food of ESh10.70 are defined and accepted, the cable of 6 kV of KGEHL 3h25+1h10+1h6 is chosen. Cable for KG2 (3x95 + 1x35) for SBSH250 burger is selected.

The short-circuit currents in the VL35 kV, VL6 kV network in the design points are calculated.

The earthing network in the area is calculated. Resistance of central ground conductor RCZ = 2.79 Ohm. Required number of electrodes pE = 23 pcs, length of connecting strip ℓp = 193.2 m. Total resistance of the grounding network RZ.TOL = 2.47 Ohm. Actual contact voltage UPR.F = 3.11 V.

The required reactive power of the capacitor unit QKY = 2293 qr is calculated, the number of capacitors in the battery for 3 phases PNOM = 84 pcs.

Annual power consumption WG = 43.2 mln kWh, annual electricity charge GWD = 14.63 mln RUR was determined. Specific cost of electricity C = 0.0339 rubles/kWh.

All decisions in the project are made in accordance with PUE, PTEEP, POTEE.

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