Capacity optimization method of main transformer in offshore wind farm considering transfer capacity

Abstract

The invention relates to a load transfer capability-considering offshore wind plant primary transformer capacity optimizing method. The method comprises the following steps of according to the total installed capacity of an offshore wind plant, giving gathered transformer substation primary transformer capacity selection schemes, selecting three values from small to large according to margin, and calculating the primary transformer investment cost of each scheme; calculating economic loss of each selected scheme, caused by primary transformer loss in the whole economic life cycle of the transformer, and taking the sum of the economic loss caused by primary transformer loss and transformer investment cost as the total cost of the scheme; on the basis of the output force characteristic of an offshore wind resource, calculating electric energy loss of each scheme, caused by the failure of one primary transformer in the whole economic life cycle of the transformer, and converting each electric energy loss into a benefit loss value according to feed-in tariff; taking the sum of the total cost and benefit loss value of each scheme as the evaluation standard of the benefit of each scheme, and performing cost benefit analysis on each type-selecting scheme of the transformer to obtain a transformer type-selecting scheme.

Description

technical field [0001] The invention belongs to the technical field of optimization design of offshore wind farms. In particular, it relates to a method for optimizing the capacity of a main transformer of an offshore wind farm. Background technique [0002] Wind resources have gradually become the most mature and realistic renewable energy besides hydropower. Compared with onshore wind farms, offshore wind power operates in a unique environment. Offshore wind farms have the advantages of high average wind speed, high annual utilization hours, and larger single-unit capacity of wind turbines. But at the same time, the offshore environmental conditions are more severe. Offshore wind farm equipment is more susceptible to harsh natural conditions such as salt spray, typhoon, and sea waves. The failure rate of wind turbine components is accelerated, and the failure rate of mechanical and electrical systems is increased. In addition, the wind and wave conditions at sea greatly ...

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Problems solved by technology

However, how much margin to set aside is generally an empirical decision, and there is a lack of theoretical research on the relationship between the margin set aside for transformers and the economic benefits of offshore wind farms

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