CN112531708A - Bypass system for improving reliability of SVG - Google Patents

Bypass system for improving reliability of SVG Download PDF

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Publication number
CN112531708A
CN112531708A CN202011565764.7A CN202011565764A CN112531708A CN 112531708 A CN112531708 A CN 112531708A CN 202011565764 A CN202011565764 A CN 202011565764A CN 112531708 A CN112531708 A CN 112531708A
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China
Prior art keywords
bypass
unit
contactor
svg
reliability
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Pending
Application number
CN202011565764.7A
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Chinese (zh)
Inventor
范方起
申宁
韩猛
张俊
董金龙
吴苏平
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Shandong Taikai Power Electronic Co ltd
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Shandong Taikai Power Electronic Co ltd
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Priority to CN202011565764.7A priority Critical patent/CN112531708A/en
Publication of CN112531708A publication Critical patent/CN112531708A/en
Pending legal-status Critical Current

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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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
    • H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
    • H02H7/262—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations involving transmissions of switching or blocking orders
    • 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
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
    • H02J13/00016—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using a wired telecommunication network or a data transmission bus
    • H02J13/00017—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using a wired telecommunication network or a data transmission bus using optical fiber
    • 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
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
    • H02J13/00036—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers
    • H02J13/0004—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers involved in a protection system
    • 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
    • H02J3/1821—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators
    • H02J3/1835—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control
    • H02J3/1842—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control wherein at least one reactive element is actively controlled by a bridge converter, e.g. active filters
    • 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
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/10—Flexible AC transmission systems [FACTS]
    • 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
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/70—Smart grids as climate change mitigation technology in the energy generation sector
    • 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
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • 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
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00—Systems supporting electrical power generation, transmission or distribution
    • Y04S10/20—Systems supporting electrical power generation, transmission or distribution using protection elements, arrangements or systems
    • 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
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00—Systems supporting electrical power generation, transmission or distribution
    • Y04S10/22—Flexible AC transmission systems [FACTS] or power factor or reactive power compensating or correcting units
    • 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
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
    • Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
    • Y04S40/124—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wired telecommunication networks or data transmission busses

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Supply And Distribution Of Alternating Current (AREA)

Abstract

The invention discloses a bypass system for improving the reliability of SVG (static var generator), which comprises an automatic bypass unit of an SVG power unit, a one-to-two unit and an electromechanical combined control bypass contactor unit, wherein the automatic bypass unit of the SVG power unit is connected with the one-to-two unit; the SVG power unit automatic bypass unit, the one-to-two unit and the electromechanical combined control bypass contactor unit are connected in parallel; the bypass system for improving the reliability of the SVG can realize the uninterrupted failure, automatically complete the bypass shielding of the failed chain link, and greatly improve the continuous operation time of equipment; the invention greatly simplifies the control circuit, improves the reliability of the bypass and improves the practical value of the engineering.

Description

Bypass system for improving reliability of SVG
Technical Field
The invention relates to the field of power quality management, in particular to a bypass system for improving the reliability of SVG.
Background
Static var generator, english description is: static Var Generator, abbreviated as SVG. Also known as a high-voltage dynamic reactive power compensation generating device or a static synchronous compensator. The device is a device for performing dynamic reactive power compensation by a self-phase-commutation power semiconductor bridge converter. SVG is the best solution in the field of reactive power control at present. Compared with the traditional modes of phase modulators, capacitor reactors, traditional SVC mainly represented by thyristor controlled reactors TCR and the like, the SVG has incomparable advantages.
Because the products need long-term and continuous stable work, and most of equipment is dispersed in complex regions such as coastal regions, mountain areas, grasslands, gobi and the like, most of on-site traffic conditions are extremely poor, or unattended power stations do not have conditions for power failure and maintenance in the first time, so that the equipment is shut down immediately after failure, and great loss is caused.
The manual short circuit copper bar mode of some adoption of current bypass technique, this mode still need the people to operate to the scene, has greatly restricted the incessant operation function of equipment. And the power is taken from adjacent chain links by adopting a mutual energy taking mode to maintain the power supply of the bypass contactor of the fault chain link, and the electric holding contactor is easy to have the condition of mistaken opening under the complex electromagnetic environment, so that the abnormity of equipment breaking and the like is caused, and the reliability is not high. Some control trouble chain link inside IGBT opens and realizes soft bypass function, but if the chain link trouble damaged the IGBT, the unable bypass function at all under this condition.
Disclosure of Invention
In order to solve the technical problems, the invention provides a bypass system for improving the reliability of SVG, which can automatically complete the bypass shielding of a fault chain link without stopping the machine when a fault occurs.
The invention is realized by the following technical scheme:
a bypass system for improving the reliability of SVG comprises an automatic bypass unit of an SVG power unit, a one-to-two unit and an electromechanical combined control bypass contactor unit; the SVG power unit automatic bypass unit, the one-to-two unit and the electromechanical combined control bypass contactor unit are connected in parallel;
the SVG power unit automatic bypass unit includes: the power unit performs data interaction with the controller through optical fiber communication, and when a certain chain link fails, the controller performs algorithm analysis on failure reasons and bypass requests according to the current equipment operation condition and parameter setting at the first time; when the bypass command control word is issued to realize automatic bypass of a fault chain link, the controller adjusts PWM (pulse-width modulation) carriers of other chain links through an algorithm to realize stable output of the capacity required by the current system by the whole machine; the bypass contactor gives feedback of the closing state to complete the automatic bypass process.
The one-to-two unit includes: in order to facilitate the installation of the contactor and the wiring of the copper bar, one contactor is adopted to control the installation mode of two chain links; the power unit with the fault sends a bypass request instruction, and after the controller gives a bypass command, adjacent chain links are bypassed at the same time;
the electromechanical joint control bypass contactor unit includes: when the fault chain link receives a bypass command, the circuit board sends out a plurality of groups of pulses to control the thyristor to be switched on through a high-voltage isolation measure, so that electric switching-on is realized; after the contactor is closed, the state can be continuously kept by a mechanical structure, and the bypass function is safely and reliably realized; the contactor has clear switching-on and switching-off indication and current state feedback points.
Further, the two links in the one-driving-two unit have the same structure.
Furthermore, in the electromechanical combined control bypass contactor unit, after power failure maintenance is finished, the opening of the contactor is realized in a manual reset mode.
The invention has the following beneficial effects:
the bypass system for improving the reliability of the SVG can realize the uninterrupted operation of faults, automatically complete the bypass shielding of fault chain links, and greatly improve the continuous operation time of equipment.
2. The invention greatly simplifies the control circuit, improves the reliability of the bypass and improves the practical value of the engineering.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts:
FIG. 1 is a schematic structural diagram of an automatic bypass unit of an SVG power unit;
FIG. 2 is a schematic structural diagram of a one-to-two unit;
fig. 3 is a schematic structural diagram of an electromechanical combined control bypass contactor unit.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-3, the invention relates to a bypass system for improving the reliability of SVG, which comprises an SVG power unit automatic bypass unit, a one-to-two unit, and an electromechanical combined control bypass contactor unit; the SVG power unit automatic bypass unit, the one-to-two unit and the electromechanical combined control bypass contactor unit are connected in parallel;
the SVG power unit automatic bypass unit includes: the power unit performs data interaction with the controller through optical fiber communication, and when a certain chain link fails, the controller performs algorithm analysis on failure reasons and bypass requests according to the current equipment operation condition and parameter setting at the first time; when the bypass command control word is issued to realize automatic bypass of a fault chain link, the controller adjusts PWM (pulse-width modulation) carriers of other chain links through an algorithm to realize stable output of the capacity required by the current system by the whole machine; the bypass contactor gives feedback of the closing state to complete the automatic bypass process.
The one-to-two unit includes: in order to facilitate the installation of the contactor and the wiring of the copper bar, one contactor is adopted to control the installation mode of two chain links; the power unit with the fault sends a bypass request instruction, and after the controller gives a bypass command, adjacent chain links are bypassed at the same time; the two chain links in the one-driving-two unit have the same structure; the number of the bypass contactors is reduced, and the engineering application value is improved;
the electromechanical joint control bypass contactor unit includes: when the fault chain link receives a bypass command, the circuit board sends out a plurality of groups of pulses to control the thyristor to be switched on through a high-voltage isolation measure, so that electric switching-on is realized; after the contactor is closed, the state can be continuously kept by a mechanical structure, and the bypass function is safely and reliably realized; the contactor has clear switching-on and switching-off indication and current state feedback points; in the electromechanical combined control bypass contactor unit, after power failure maintenance is finished, the opening of the contactor is realized in a manual reset mode.
A bypass control system for improving reliability of SVG. The power unit carries out data interaction with the controller through optical fiber communication, and when a certain chain link breaks down, the controller carries out algorithm analysis on the failure reason and the bypass request according to the current equipment operation condition and parameter setting at the first time. And when the bypass command control word is issued to realize automatic bypass of the fault chain link, the controller adjusts PWM (pulse-width modulation) carriers of other chain links through an algorithm to realize stable output of the capacity required by the current system by the whole machine. After receiving the control signal, the electromechanical combined control bypass contactor completes closing at millisecond level, continuously maintains the state by using a mechanical structure, and gives feedback of the closing state to complete the automatic bypass process.
The bypass system with the improved SVG reliability can realize the uninterrupted failure, automatically complete the bypass shielding of the failed chain link, and greatly improve the continuous operation time of equipment; the scheme greatly simplifies the control circuit, improves the reliability of the bypass and improves the practical value of engineering.

Claims (3)

1. A bypass system for improving the reliability of SVG comprises an automatic bypass unit of an SVG power unit, a one-to-two unit and an electromechanical combined control bypass contactor unit; the SVG power unit automatic bypass unit, the one-to-two unit and the electromechanical combined control bypass contactor unit are connected in parallel; the method is characterized in that:
the SVG power unit automatic bypass unit includes: the power unit performs data interaction with the controller through optical fiber communication, and when a certain chain link fails, the controller performs algorithm analysis on failure reasons and bypass requests according to the current equipment operation condition and parameter setting at the first time; when the bypass command control word is issued to realize automatic bypass of a fault chain link, the controller adjusts PWM (pulse-width modulation) carriers of other chain links through an algorithm to realize stable output of the capacity required by the current system by the whole machine; the bypass contactor gives feedback of a closed state to complete an automatic bypass process;
the one-to-two unit includes: in order to facilitate the installation of the contactor and the wiring of the copper bar, one contactor is adopted to control the installation mode of two chain links; the power unit with the fault sends a bypass request instruction, and after the controller gives a bypass command, adjacent chain links are bypassed at the same time;
the electromechanical joint control bypass contactor unit includes: when the fault chain link receives a bypass command, the circuit board sends out a plurality of groups of pulses to control the thyristor to be switched on through a high-voltage isolation measure, so that electric switching-on is realized; after the contactor is closed, the state can be continuously kept by a mechanical structure, and the bypass function is safely and reliably realized; the contactor has clear switching-on and switching-off indication and current state feedback points.
2. The SVG reliability-enhanced bypass system according to claim 1, wherein: the two links in the one-to-two unit have the same structure.
3. The SVG reliability-enhanced bypass system according to claim 1, wherein: in the electromechanical combined control bypass contactor unit, after power failure maintenance is finished, the opening of the contactor is realized in a manual reset mode.
CN202011565764.7A 2020-12-25 2020-12-25 Bypass system for improving reliability of SVG Pending CN112531708A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114243722A (en) * 2021-11-29 2022-03-25 深圳市禾望电气股份有限公司 Two-in-one SVG power module and bypass control method thereof

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160247641A1 (en) * 2013-09-18 2016-08-25 Paolo Malapelle Fiber optic ring for bypass system in multi-cell power supply
CN106374505A (en) * 2015-07-24 2017-02-01 特变电工新疆新能源股份有限公司 STATCOM (Static Synchronous Compensator) chain element unit bypass device and control system
CN110994633A (en) * 2019-11-19 2020-04-10 广东安朴电力技术有限公司 Chained SVG chain link module bypass control system and control method thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160247641A1 (en) * 2013-09-18 2016-08-25 Paolo Malapelle Fiber optic ring for bypass system in multi-cell power supply
CN106374505A (en) * 2015-07-24 2017-02-01 特变电工新疆新能源股份有限公司 STATCOM (Static Synchronous Compensator) chain element unit bypass device and control system
CN110994633A (en) * 2019-11-19 2020-04-10 广东安朴电力技术有限公司 Chained SVG chain link module bypass control system and control method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114243722A (en) * 2021-11-29 2022-03-25 深圳市禾望电气股份有限公司 Two-in-one SVG power module and bypass control method thereof

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Application publication date: 20210319