A wind farm full DC power aggregation system

A wind farm and full DC technology, which is applied in the direction of parallel operation of DC power supplies, can solve the problems of non-full DC power convergence and transmission systems, and achieve the effects of low loss, cost reduction, and simple structure

Inactive Publication Date: 2017-07-07
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] However, no matter what kind of power aggregation structure the wind farms are in, the generators they use are still doubly-fed asynchronous or permanent magnet direct-drive AC generators. To carry out DC transmission, there must be a rectification link, so they are not The true full DC power gathering and transmission system

Method used

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  • A wind farm full DC power aggregation system
  • A wind farm full DC power aggregation system
  • A wind farm full DC power aggregation system

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Embodiment Construction

[0046] Such as figure 1 Shown is the SRG system and its DC conversion circuit diagram of the present invention, which is composed of SRG system (111) and DC conversion circuit (112), and the DC hybrid matrix wind farm structure is as follows figure 2 As shown, 11, ..., mn among them are m×n identical SRG systems and their DC conversion circuits, and K11, ..., K(m-1)(n-1) are (m-1)×(n- 1) identical power electronic switches (K11, . . . , K(m-1)(n-1)).

[0047] Such as figure 1 As shown, the SRG system (111) outputs direct current and enters the DC conversion circuit (112). Capacitor C1 and capacitor C2 have the functions of voltage support, filtering and energy storage, while resistor R1 and resistor R2 play a role of balancing capacitor C1 and capacitor C2. Voltage and protection, as well as providing a discharge circuit for capacitor C1 and capacitor C2, resistor R1 and resistor R2 are generally around 100MΩ, otherwise they will consume a large amount of active power if th...

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Abstract

The invention discloses a full DC (Direct Current) electric energy converging system of a wind power station. The full DC electric energy converging system of the wind power station is composed of SRG (Switched Reluctance Generator) systems and DC conversion circuits thereof, electric power electronic switches and electric power lines, wherein multiple SRG systems and the DC conversion circuits thereof are firstly connected in series to form a branch circuit; branch circuits which are composed of the SRG systems and the DC conversion circuits in the same number are connected in parallel; same polar ends of parallel and adjacent SRG systems and the DC conversion circuits of different branch circuits are connected by virtue of the electric power electronic switches; each SRG system and the DC conversion circuit thereof is composed of an SRG system and a DC conversion circuit; each SRG system is connected with each DC conversion circuit; each DC conversion circuit is composed of a capacitor C1, a capacitor C2, a capacitor C3, a resistor R1, a resistor R2, a resistor R3, a diode VD, an electric power electronic switch VT1, an electric power electronic switch VT2, an electric power electronic switch VT3 and an electric reactor L. The full DC electric energy converging system of the wind power station is simple in structure, small in volume, low in loss, high in power transmission benefit and low in cost.

Description

technical field [0001] The invention relates to the field of wind power generation, in particular to a wind farm electrical system with a simple structure that adopts a switched reluctance generator that directly outputs direct current electric energy as a wind power generator, full direct current electric energy convergence and direct current transmission. Background technique [0002] With the large-scale development of one-time petrochemical resources such as oil and coal, the energy crisis and environmental degradation have become increasingly serious. The only way to solve this problem is to accelerate the development of sustainable resources. Among the existing renewable energy, wind energy is one of the highest resources regardless of scale or availability, and wind energy does not consume mineral resources in the process of utilization, and does not emit harmful substances. It is regarded as clean, green and environmentally friendly. energy. [0003] The line from X...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J1/10
CPCH02J1/10
Inventor 孙冠群
Owner CHINA JILIANG UNIV
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