Wind power plant direct power supply economy assessment method

Abstract

The invention provides a wind power plant direct power supply economy assessment method. The method comprises the steps that an economy pre-assessment model is adopted to carry out economy pre-assessment before a direct power supply service is introduced into a load; and the economic post-evaluation is carried out after load is introduced into the direct power supply service by adopting an economic post-evaluation model. The economy pre-evaluation model assumes that a direct power supply project is a constant load; after a user inputs load parameters and protocol electricity price parameters,the load is decomposed and income is calculated according to several modes, all the incomes and losses are summed up according to time points to obtain a direct power supply load accumulation income curve, and the estimated income conditions of multiple stations are compared to obtain the optimal operation site and estimated operation income of a project, wherein the post-evaluation algorithm is similar to the pre-evaluation algorithm, and the data source is replaced by the real-time operation data and AGC data of the wind power plant after the direct power supply project is put into operation. According to the method, effective data support is provided in the direct power supply project expansion stage, and the profit of the put-into-operation direct power supply project can be accuratelyevaluated.

Description

technical field [0001] The invention belongs to an electric power system, and in particular relates to a method for evaluating the economy of a direct power supply of a wind farm. Background technique [0002] The installed capacity of wind farms in Xinjiang is relatively large. Affected by grid structure factors and thermal power peak shaving factors, the rate of curtailment remains high all year round. The high rate of curtailment seriously affects the profitability of wind farms. In order to absorb more abandoned wind power, improve economic benefits, and open up the market, direct power supply loads are introduced to consume abandoned wind power locally. [0003] For direct power supply business, economic pre-assessment is required before load is introduced; after load is introduced, post-assessment of actual profitability is required on a regular basis. For the pre-assessment model, the traditional evaluation method can only analyze the historical curtailment rate and ...

AI Technical Summary

Problems solved by technology

For the pre-assessment model, the traditional evaluation method can only analyze the historical power curtailment rate and wind power curtailment, without considering the time distribution of power curtailment points, and the evaluation accuracy is poor

For the post-evaluation model, the current calculation method is to read the electricity data from the energy meter on the load side of the direct power supply, and calculate it according to the agreed electricity price. This model does not take into account the potential of off-grid power consumed by loads and on-grid power when there is no power limit. Loss, unable to accurately calculate the economic benefits brought by the direct power supply load

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