Transformer type adjustable reactor and static reactive compensator compose of it

A transformer-type, reactance-adjusting technology, applied in reactive power compensation, reactive power adjustment/elimination/compensation, etc., can solve the problems of complex design and implementation, high technical difficulty and high cost, and achieve good harmonic performance and wide adjustment. Scope, small effect of harmonic pollution

Inactive Publication Date: 2005-03-02
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

However, CSRT has the following disadvantages: ① In order to reduce the harmonic distortion rate of the injected system current at light load, there is an unadjustable dead zone; ② In order to meet the harmonic limit of the reactor output current in the working area, the capacity of each level of the winding is controlled and th

Method used

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  • Transformer type adjustable reactor and static reactive compensator compose of it
  • Transformer type adjustable reactor and static reactive compensator compose of it
  • Transformer type adjustable reactor and static reactive compensator compose of it

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Embodiment Construction

[0021] Such as figure 2 As shown, the transformer-type adjustable reactor of the present invention includes three parts: parallel transformer unit 1 , voltage source inverter (Voltage Source Inverter, VSI) combined unit 2 and adjustable reactor combined unit 3 . Parallel transformer unit 1 side has N windings: W C1 ~W CN ; VSI combination unit 2 consists of a double-bridge inverter power supply 2.1 and a current-limiting reactor X 1 Composed in series, in series with the first winding W of the secondary side of the parallel transformer unit 1 C1 Above; the adjustable reactor combination unit 3 is composed of (N-1) thyristor switched reactor (Thyristor Switched Reactor, TSR) branches 3.2-3.N, and each TSR branch is composed of an anti-parallel thyristor T i1(i=2,...,N) and a reactor X i1 (i=2,...,N) in series, the (N-1) TSR branches are respectively connected in series with the second to Nth windings W on the secondary side of the parallel transformer unit 1 C2 ~W CN sup...

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Abstract

This invention relates to a transformer type adjustable reactance, and the static reactive compensator made thereof. The reactance comprises: a parallet transformer unit, voltage source type inverter combniation unit and an adjustable reactance combination unit. Above-said inverter combination unit involves a double arm inverter power source series connected with current-limiting reactance. Adjustable reactane combniation unit involves (N-1) pieces of crystal valve tube throw-over reactance branches, each of which being parallel connection respectively antiparallet connection crystal valve tube T(i1) and a reactance X(i1). The compensator composed by above-said reactance comprises also: a fixed parallet capacitor unit, testing unit and a control unit. Advantages are: no need of special fitler, large capacity, low harmonic wave pollution, quick dynamic response.

Description

technical field [0001] The invention belongs to the field of power system automation, and in particular relates to a transformer-type adjustable reactor and a static var compensator formed therefrom. Background technique [0002] The safety, stability and economic operation level of the power system are closely related to the reactive power balance. For this reason, it is necessary to install corresponding compensation devices to solve the problems of reactive power shortage and reactive power surplus that may occur in different operating modes of the power system. To sum up, the reactive power compensators currently being applied and researched are as follows: [0003] Static Var Compensator (Static Var Compensator, SVC): In this type of compensator, currently researched and used more is the SVC based on Thyristor Controlled Reactor (TCR), which can better solve the load However, a large amount of harmonic current will be injected into the system during the TCR workin...

Claims

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Application Information

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IPC IPC(8): H02J3/18
CPCY02E40/30
Inventor 丁洪发段献忠朱庆春
Owner HUAZHONG UNIV OF SCI & TECH
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