CN114258620A - 一种电压不对称故障时的电流控制方法及系统 - Google Patents

一种电压不对称故障时的电流控制方法及系统 Download PDF

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Publication number
CN114258620A
CN114258620A CN202080005644.3A CN202080005644A CN114258620A CN 114258620 A CN114258620 A CN 114258620A CN 202080005644 A CN202080005644 A CN 202080005644A CN 114258620 A CN114258620 A CN 114258620A
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China
Prior art keywords
current
converter
reactive current
preset
positive sequence
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CN202080005644.3A
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English (en)
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CN114258620B (zh
Inventor
邵章平
辛凯
郭海滨
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Huawei Digital Power Technologies Co Ltd
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Huawei Digital Power Technologies Co Ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/001—Methods to deal with contingencies, e.g. abnormalities, faults or failures
    • H02J3/0012—Contingency detection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
    • G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/001—Methods to deal with contingencies, e.g. abnormalities, faults or failures
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/26—Arrangements for eliminating or reducing asymmetry in polyphase networks
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/66—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/20—Pc systems
    • G05B2219/26—Pc applications
    • G05B2219/2639—Energy management, use maximum of cheap power, keep peak load low

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Supply And Distribution Of Alternating Current (AREA)
  • Control Of Electrical Variables (AREA)
  • Inverter Devices (AREA)

Abstract

本申请公开了一种电压不对称故障时的电流控制方法及系统，当发生电压不对称故障时，根据故障后的正序电压和故障前的正序无功电流获得第一电流限值，根据故障后的负序电压和故障前的负序电压获得第二电流限值；根据第一电流限值和第二电流限值获得第三电流限值和第四电流限值；利用第三电流限值对正序无功电流限幅，利用第四电流限值对负序无功电流限幅，防止在电压不对称故障时注入的负序无功电流造成电流过流。该方法一次性地获得正序无功电流的限幅值和负序无功电流的限幅值，无需经过反复迭代计算，在较短的时间内获得符合要求的正序无功电流和负序无功电流，缩短无功电流的调节时间，解决负序无功电流使变流器过电流的问题。

Description

PCT国内申请，说明书已公开。

Claims (23)

  1. PCT国内申请，权利要求书已公开。
CN202080005644.3A 2020-07-24 一种电压不对称故障时的电流控制方法及系统 Active CN114258620B (zh)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2020/104454 WO2022016510A1 (zh) 2020-07-24 2020-07-24 一种电压不对称故障时的电流控制方法及系统

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CN114258620A true CN114258620A (zh) 2022-03-29
CN114258620B CN114258620B (zh) 2024-09-24

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104009486A (zh) * 2014-06-20 2014-08-27 安徽工业大学 一种三相三线制svg的非对称补偿限流方法
US20140320148A1 (en) * 2013-04-30 2014-10-30 Eaton Corporation System and method for detecting excess voltage drop in three-phase ac circuits
CN104505841A (zh) * 2014-12-03 2015-04-08 许继电气股份有限公司 电网不对称短路故障的静止同步发电机无功支撑控制方法
CN106533239A (zh) * 2016-12-13 2017-03-22 天津大学 具有自适应限流功能的三相四桥臂并网逆变器控制方法
CN109193753A (zh) * 2018-08-22 2019-01-11 北京金风科创风电设备有限公司 风电变流器低电压穿越控制方法、装置、设备及存储介质
CN109217342A (zh) * 2018-11-17 2019-01-15 深圳市禾望电气股份有限公司 负载不对称校正控制方法、静止无功发生器及存储介质

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140320148A1 (en) * 2013-04-30 2014-10-30 Eaton Corporation System and method for detecting excess voltage drop in three-phase ac circuits
CN104009486A (zh) * 2014-06-20 2014-08-27 安徽工业大学 一种三相三线制svg的非对称补偿限流方法
CN104505841A (zh) * 2014-12-03 2015-04-08 许继电气股份有限公司 电网不对称短路故障的静止同步发电机无功支撑控制方法
CN106533239A (zh) * 2016-12-13 2017-03-22 天津大学 具有自适应限流功能的三相四桥臂并网逆变器控制方法
CN109193753A (zh) * 2018-08-22 2019-01-11 北京金风科创风电设备有限公司 风电变流器低电压穿越控制方法、装置、设备及存储介质
CN109217342A (zh) * 2018-11-17 2019-01-15 深圳市禾望电气股份有限公司 负载不对称校正控制方法、静止无功发生器及存储介质

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EP4156433A1 (en) 2023-03-29
EP4156433A4 (en) 2023-10-25
WO2022016510A1 (zh) 2022-01-27
US20230178989A1 (en) 2023-06-08

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