CN202094644U - 高压静止无功发生器并网结构 - Google Patents

高压静止无功发生器并网结构 Download PDF

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CN202094644U
CN202094644U CN2011202096053U CN201120209605U CN202094644U CN 202094644 U CN202094644 U CN 202094644U CN 2011202096053 U CN2011202096053 U CN 2011202096053U CN 201120209605 U CN201120209605 U CN 201120209605U CN 202094644 U CN202094644 U CN 202094644U
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bus
voltage static
svg
static var
var generator
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周雨田
李君明
张福华
李春
李军
林彦春
洪利
关维
崔向志
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Liaoning Rongxin Industrial Electric Power Technology Co ltd
Montnets Rongxin Technology Group Co ltd
State Grid Corp of China SGCC
State Grid Liaoning Electric Power Co Ltd
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Rongxin Power Electronic Co Ltd
State Grid Liaoning Electric Power Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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    • Y02E40/10—Flexible AC transmission systems [FACTS]

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Abstract

本实用新型涉及高压静止无功发生器并网结构。高压静止无功发生器并网结构，在35kV母线上并联两套SVG无功补偿装置，两台主变压器连接在220kV母线与35kV母线之间，两台主变压器为一工一备工作方式。与现有技术相比，本实用新型的优点是：本实用新型为工程设计人员提供了明确的设计思路，使其在进行设计时可以少走一些弯路，并且能够避免因为设计的不缜密而导致SVG设备的补偿效果不好而给电网带来污染，甚至造成设备的损坏。

Description

高压静止无功发生器并网结构
技术领域
本实用新型涉及高压静止无功发生器并网结构。
背景技术
新能源发展、电网安全运行以及节能减排的要求推动了电网朝着智能化方向的升级。特别是近几年风力发电、光伏发电项目的兴起，更是给输电网的发展带来了一场重大而深刻的变革，但是与此同时电网中无功的增大也对电网提出了更大的考验，例如电力系统中的电抗器和架空线会消耗一些无功功率。除此之外，一些电力电子装置等非线性装置也要消耗无功功率，特别是各种相控装置、如相控整流器等，在工作时基波电流滞后于电网电压，要消耗大量的无功功率。这些都在一定程度上推动了高压静止无功发生器SVG产品(国际上又称为STATCOM)的发展。
高压静止无功发生器SVG(国际上又称为STATCOM)并联于电网中，相当于一个可变的无功电流源，以待补偿点电网的电压作为同步信号，采集电网电流信号，判断电网电流分量与电压之间的相位关系，通过调节电力电子器件导通和截止的方向和频率，来改变输出无功电流的性质与大小，快速地跟随负荷无功电流的变化，自动补偿系统所需无功功率，SVG基本结构示意图如图1所示，该结构是每条母线上均并联一套SVG，SVG由功率器件S1、S2、S3、S4及每个功率器件并接的二极管组成。
近些年来SVG正逐步应用在各个领域的工程实践中，主要包括区域电网、发电厂、冶金、矿山、电力机车供电系统等领域，并且在治理电网污染方面起到了举足轻重的作用。受供电系统结构、SVG使用数量以及特殊的现场工况等因素的制约，对SVG的并网方式提出了具体要求。
发明内容
本实用新型的目的是提供两种高压静止无功发生器并网结构，该SVG并网结构的应用，可达到优化工程设计和维护系统运行稳定的目的。
为实现上述目的，本实用新型通过以下技术方案实现：
高压静止无功发生器并网结构，在35KV母线上并联两套SVG无功补偿装置，两台主变压器连接在220KV母线与35KV母线之间，两台主变压器为一工一备工作方式。
高压静止无功发生器并网结构，在两条6KV母线上分别并联一套SVG无功补偿装置，两台主变压器分别连接在35KV母线与6KV母线之间，且通过母联开关连接使两套SVG无功补偿装置互相作为备用。
与现有技术相比，本实用新型的优点是：
本实用新型为工程设计人员提供了明确的设计思路，使其在进行设计时可以少走一些弯路，并且能够避免因为设计的不缜密而导致SVG设备的补偿效果不好而给电网带来污染，甚至造成设备的损坏。
附图说明
图1是SVG并接于电网的高压静止无功发生器并网基本结构图；
图2是用于风电场升压站的一条母线上并挂两套SVG的高压静止无功发生器并网结构图；
图3是用于煤矿变电站的两条母线上各挂一套SVG，两条母线之间通过母联开关互相作为备用的高压静止无功发生器并网结构图。
具体实施方式
实施例1
见图2，用于风电场升压站的高压静止无功发生器并网结构，在35KV母线上并联两套SVG装置，1#SVG装置和2#SVG装置。两台主变压器1#主变和2#主变为一工一备工作方式，连接在220KV母线与35KV母线之间。35KV母线上连接有采集电压信号的电压互感器PT。
一条母线上并挂两套SVG，随着系统无功功率的变化，两套SVG检测同一条母线上电流的性质与大小，并根据电网对无功补偿的需求，分配每一套SVG输出无功的大小，达到精确补偿的目的。
实施例2
见图3，用于煤矿变电站的高压静止无功发生器并网结构，在两条6KV母线上分别并联一套SVG无功补偿装置，两台主变压器1#主变和2#主变分别连接在35KV母线与6KV母线之间，且通过母联开关K连接使两套SVG无功补偿装置互相作为备用。
两条母线上各挂一套SVG，两条母线之间通过母联开关K互相作为备用，要求两套SVG除了能够正常补偿自己对应母线的无功外，在必要的情况下还能对另一条母线进行无功补偿。

Claims (2)

1.高压静止无功发生器并网结构，其特征在于，在35KV母线上并联两套SVG无功补偿装置，两台主变压器连接在220KV母线与35KV母线之间，两台主变压器为一工一备工作方式。
2.高压静止无功发生器并网结构，其特征在于，在两条6KV母线上分别并联一套SVG无功补偿装置，两台主变压器分别连接在35KV母线与6KV母线之间，且通过母联开关连接使两套SVG无功补偿装置互相作为备用。
CN2011202096053U 2011-06-20 2011-06-20 高压静止无功发生器并网结构 Expired - Lifetime CN202094644U (zh)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107591820A (zh) * 2017-08-31 2018-01-16 中石化川气东送天然气管道有限公司 一种svg协调补偿系统和方法
CN108808729A (zh) * 2018-06-07 2018-11-13 中国华电科工集团有限公司 一种发电厂电气主接线的新型电路结构

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107591820A (zh) * 2017-08-31 2018-01-16 中石化川气东送天然气管道有限公司 一种svg协调补偿系统和方法
CN107591820B (zh) * 2017-08-31 2024-04-16 中国石油化工股份有限公司 一种svg协调补偿系统和方法
CN108808729A (zh) * 2018-06-07 2018-11-13 中国华电科工集团有限公司 一种发电厂电气主接线的新型电路结构

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Owner name: RONGXIN POWER ELECTRONIC CO., LTD. STATE GRID CORP

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