Wind power plant primary system and topology and configuration method and device thereof

Abstract

The embodiment of the invention provides a wind power plant primary system and a topology and configuration method and device thereof, and relates to the field of power equipment. The use number of transformers can be reduced and the requirement for a power transmission line and a power transmission tower can be reduced so that the cost of the system can be reduced. The method comprises the steps that the loss rate from wind generating sets in a wind power plant to the primary power transmission line of the primary boosting transformer is acquired; the wind generating sets are grouped according to the loss rate from the single wind generating set to the primary power transmission line of the primary boosting transformer; the primary boosting transformer and the primary power transmission line connected to the primary boosting transformer are configured for the corresponding set of wind generating set according to the loss rate from the single wind generating set of all the wind generating sets to the primary power transmission line of the primary boosting transformer; and secondary boosting transformers and secondary power transmission lines connected to the secondary boosting transformers are configured for all the primary boosting transformers so as to form the wind power plant primary system topology. The wind power plant primary system and the topology and configuration method and device thereof are used for the design of the wind power plant primary system.

Description

technical field [0001] The invention relates to the field of electric power equipment, in particular to a primary system of a wind farm and its topology configuration method and device. Background technique [0002] The primary system of a wind farm refers to the high-voltage electrical equipment used in the production process of producing, transmitting and distributing electric energy. The primary system of a wind farm mainly includes primary equipment such as wind turbines, transformers, circuit breakers, disconnectors, automatic switches, contactors, knife switches, busbars, transmission lines, power cables, reactors, and motors. The electrical circuits that are connected to each other by primary equipment to form power generation, transmission, distribution or other production processes are called primary circuits or primary systems. [0003] Due to the large number of wind turbines in the wind farm and the scattered layout, the design of the primary system of the wind ...

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Problems solved by technology

[0004] refer to figure 1 As shown, the outlet voltage level of the general wind turbine (1) is low voltage, such as 690V, which cannot be used for long-distance power transmission. Therefore, it is necessary to adopt a one-machine-one-change method, that is, a wind turbine is equipped with a first-level step-up transformer In the way of (2), the voltage is raised to 35kV on the spot, and finally connected to the booster station of the wind farm through the collector line

The cost of the first-stage step-up transformer is high, and the step-up method of one machine and one change will make the construction cost of the wind farm higher

In addition, the collection lines in the wind farm are all 35kV transmission lines (4) (of which 35KV transmission lines are usually overhead lines, and some special environments also choose buried cables), and the cost of high-voltage transmission lines and laying costs are relatively high , in addition, the 35kV transmission line needs a steel structure transmission tower (3), which consumes a large amount of rigid materials and is relatively expensive. In short, the primary system of the wind farm in the prior art is not conducive to cost control

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