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Dynamic voltage compensator in series type by using super conduct to store energy

A dynamic voltage compensation and superconducting energy storage technology, which is applied in the usage of superconductor elements, reactive power compensation, reactive power adjustment/elimination/compensation, etc., can solve problems such as low energy conversion efficiency, complex control system, and performance limitations , to achieve the effects of good power regulation performance, high energy storage density and high flexibility

Inactive Publication Date: 2007-09-05
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This makes it bulky, and due to the existence of the process of converting mechanical energy into electrical energy, the energy conversion efficiency is low
And the flywheel is a high-speed rotating part, the control system used to stabilize and position the flywheel will be very complicated
[0008] Therefore, if the cost allows, the performance of the DVR using the traditional energy storage unit is greatly limited.

Method used

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  • Dynamic voltage compensator in series type by using super conduct to store energy
  • Dynamic voltage compensator in series type by using super conduct to store energy
  • Dynamic voltage compensator in series type by using super conduct to store energy

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Embodiment Construction

[0028] The series dynamic voltage compensator adopting SMES as the energy storage module proposed by the present invention has a circuit diagram as shown in Figure 1, including:

[0029] (1) The charging module used to charge the SMES module includes a three-phase rectifier bridge composed of six power diodes and a capacitor C 1 composed of filters and an IGBT (T 1 ). Among them, the rectifier bridge is used to convert the AC power obtained from the system into DC power through uncontrolled rectification, and output the power from the DC side of the rectifier bridge to charge the SMES module. The filter is connected in parallel on the DC side of the rectifier bridge to filter out high-frequency harmonic components in the output voltage. T 1 The negative pole connected in series with the DC side of the charging module is used to control whether the charging module charges the SMES module;

[0030] (2) The SMES module used to store the electric energy in the form of direct c...

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PUM

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Abstract

The voltage compensator is composed of following parts: for charging module of superconducting energy storage, charging module is composed of a rectification bridge in three phase, a filter and a electronic switch; connected to DC side of charging module and inversion module in parallel and in use for storing electrical energy in DC form, the module of superconducting energy storage consists of a superconducting coil, a electronic switch, a power diode and a capacitance; in use for outputting offset voltage, the inversion unit includes inversion bridge in three phase; in use for connecting dynamic voltage compensator to power system, the isolation filtering unit includes three pieces of isolating transformer and three capacitors. The disclosed dynamic voltage compensator meets the need for compensating voltage fall off at short time in power system. Comparing with prior art, the disclosed dynamic voltage compensator possesses better dynamic response and longer compensating time.

Description

technical field [0001] The invention relates to a series dynamic voltage compensator adopting superconducting energy storage, which belongs to the technical field of electric equipment. Background technique [0002] The voltage required by the user is a continuous, three-phase symmetrical, frequency fixed at 50Hz, amplitude maintaining the nominal sinusoidal AC voltage, without distortion and harmonics. When this requirement is not met, a voltage quality problem is considered to exist. Characterized by duration, voltage quality problems can usually be divided into steady-state voltage quality problems and dynamic voltage quality problems, the latter being most representative of dynamic voltage dips and voltage rises. [0003] Dynamic Voltage Compensator (hereinafter referred to as DVR) is a flexible AC transmission (FACTS) technology, a kind of series power quality regulator, and is currently the most effective and economical solution to the problem of voltage drop and rise...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/32H02J3/18G05F1/70
CPCY02E40/30Y02E40/67Y02E40/60
Inventor 姜齐荣张迪刘硕
Owner TSINGHUA UNIV
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