A method for optimizing power generation cost in iron and steel enterprises

Abstract

The invention provides a power generation cost optimization method for an iron and steel enterprise, and belongs to the technical field of comprehensive power saving in iron and steel enterprises. The power generation cost optimization method comprises the following steps: a dispatching cycle T which needs power generation cost optimization is determined, and power generation cost optimization parameters of a set are acquired; a network cross section used for planning a current power generation schedule is acquired; fuel cost of the generator set under the condition of coal gas blending combustion in the cycle is determined; according to the energy consumption of the set of the iron and steel enterprise, external electricity purchasing cost and an external power transmission income physical truth, an optimized dispatching model which aims for the lowest power generation cost of a whole system is established; results of self-generating set output, externally purchased electricity, externally transmitted electric quantity and the like of the iron and steel enterprise are obtained according to an optimization solution. The power generation cost optimization method for the iron and steel enterprise has the advantages of being capable of meeting requirements for production loads, generator set output, line transmission capacity and the like, guaranteeing safe and reliable operation of a grid of the iron and steel enterprise, further optimizing and adjusting self-generating electricity output and a proportional relation between self-generated electricity and externally purchased electricity in combination with a load prediction curve and a production and repair schedule, and enabling the generation cost of the iron and steel enterprise to be the lowest.

Description

technical field [0001] The invention belongs to the technical field of comprehensive power saving in iron and steel enterprises, and in particular provides a method for optimizing power generation costs in iron and steel enterprises. Background technique [0002] Electricity is a relatively important energy source for iron and steel enterprises, and it accounts for 20% of the energy consumption structure of iron and steel. In some electrical equipment such as (motor, blower, compressor, etc.), process heating and other process engineering, power resources are required. Iron and steel enterprises come from two sources of electricity: self-generated electricity and purchased electricity. Self-generated electricity mainly refers to self-provided power plants within enterprises and waste heat and waste energy recycling for power generation. Although self-generated electricity accounts for an increasing proportion of total electricity consumption, enterprises still need to purch...

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Problems solved by technology

However, there are few studies on the optimization of power generation cost of the enterprise's own power grid, and some of them are only based on experience or peak-to-peak valley electricity prices to manually set the output curve of generator sets. (by-product gas, purchased coal), multi-voltage levels, multi-working conditions changes (production plan, maintenance plan), and the power system is closely related to the process, part of the power comes from the recovery and conversion of waste heat and energy during the production process (such as TRT, CDQ), some power fuel source process by-product gas and other characteristics, the power generation plan set according to experience will encounter difficulties in actual implementation, in addition, empirical scheduling cannot effectively consider the safety of the system, and the obtained operation plan is actually It is often not feasible and requires repeated adjustments, which makes it difficult to ensure the safety and economy of operation, and brings a huge workload to dispatchers

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