Amorphous alloy transformer energy-saving efficiency analysis

      Compared with the integrated series transformer, amorphous alloy transformer no-load loss in its main loss reduction depends on the slash.
1 year power saving cost comparison
      By direct comparison of two kinds of transformer no-load loss cost, to calculate the costs of electricity saving, amorphous alloy transformer can be reflected intuitively simple energy saving efficiency.  Electricity saving benefits of amorphous alloy transformer, 500 kva, for example, assume that amorphous alloy transformer price more expensive than the integrated 18000 yuan/set, save electricity, 5207 yuan a year, simple calculation, amorphous alloy transformer to buy more of the investment, the static payback period is 3.8 years, is more increased investment, 3.8 years after the running of the product, can be recycled by less pay electricity saving. Calculated on product lasts 20 years, in the rest of the 16.2 years of the communist party of China can save electricity, 76480 yuan, can new purchases almost a transformer. If the local electricity more than 0.70 yuan/kWh, the energy-saving benefit is more prominent.
      Wuhan electric power company power supply company urban distribution network running 592 open and close station (substation, box), running transformer for 1131, the total capacity of 906890 kva. In the operation of transformer, models for S7 / S8 / integrated form. Operation load rate below 1% for 79 units; Run load rate was 1% ~ 1% for 1014 units; Load factor in more than 50% for 38. Transformer no-load loss is very big. If using amorphous alloy transformer, reduce no-load loss, equipment for reducing line loss and improve economic efficiency, the company will be very significant.
2 investment spreads recycling
      Amorphous alloy transformer no-load loss are integrated to reduce 80%, assuming that the price is 30% higher than the integrated series of average, only its equal with the integrated transformer load loss. When I do not consider investing the time value of money, the use of static investment payback period calculation method to calculate, can be concluded that under the condition of different load rate, increase investment in how long recovery.
3 investment spreads recovery period calculation
      Dynamic payback period of investment: consider investing the time value of money, the investment and future earnings are now in the form of capital discount rate discount to present value. The method calculation is complex, involves the rate of inflation, money bank interest rate, discount rate, etc., so many uncertain factors. We use static investment payback period method.
      Assuming 500 kvas9 transformer silicon steel price is 80000 yuan, the corresponding amorphous alloy transformer price is 30% higher, the price difference of the two is 24000 yuan,
      When load factor beta = 20%, amorphous alloy transformer investment recovery period is 3.1 (years);
4 considering reactive component and load rate of saving energy consumption estimates
      When transformer operation, different load rate, energy consumption per year is different also, to two and 500 kva, 200 kva capacity comparison, amorphous alloy transformer and the integrated silicon steel performance parameters of the transformer and the annual energy consumption, an amorphous alloy transformer of 500 kva run a year later, than the integrated transformer silicon steel saving energy consumption is about 9.4 MWh, calculated at 0.7625 yuan/kWh, can save electricity costs 7167.5 yuan a year.
5 performance measure
      Total cost method (hereinafter referred to as the TOC method) is a kind of energy consumption of the transformer and the price reasonable comprehensive performance evaluation method of transformer purchasing abroad are widely used in the appraisal. It is based on the principle of comprehensive transformer price and energy consumption level, in accordance with the lowest total cost to choose the transformer.
      When the amorphous alloy transformer's price is 1.3 times of the integrated transformer, the TOC method to measure the amorphous transformer price is 10.3% higher than the integrated.
National basic construction project feasibility study on energy saving of the interim provisions on the said calculation of investment recovery period is generally should not be more than 5 years, the longest do not exceed 7 years, according to the provisions of the policy of amorphous alloy transformer is more than the integrated transformer part of investment, both in policy within the period stipulated by the back, so the popularization and application of amorphous alloy transformer, conforms to the national energy saving policy guidance.