CN114243725A - Fault removal system and method for alternating current contactor and SVG - Google Patents
Fault removal system and method for alternating current contactor and SVG Download PDFInfo
- Publication number
- CN114243725A CN114243725A CN202111664921.4A CN202111664921A CN114243725A CN 114243725 A CN114243725 A CN 114243725A CN 202111664921 A CN202111664921 A CN 202111664921A CN 114243725 A CN114243725 A CN 114243725A
- Authority
- CN
- China
- Prior art keywords
- fault
- svg
- power unit
- contactor
- direct voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 33
- 239000013307 optical fiber Substances 0.000 claims description 5
- 238000013024 troubleshooting Methods 0.000 claims 3
- 238000003860 storage Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 10
- 238000004590 computer program Methods 0.000 description 9
- 230000006870 function Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 239000000306 component Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1892—Arrangements for adjusting, eliminating or compensating reactive power in networks the arrangements being an integral part of the load, e.g. a motor, or of its control circuit
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The embodiment of the invention provides an alternating current contactor, and a fault removal system and method of SVG, and belongs to the technical field of SVG equipment fault removal. Alternating current contactor disposes on SVG's power unit, alternating current contactor includes: a mechanical bypass controller and a contactor for closing to short circuit the power unit; wherein, machinery bypass control ware can be in the drive when power unit breaks down the contactor is closed a floodgate for the power unit's that has broken down short circuit just makes SVG equipment can receive with the required direct voltage of SVG equipment normal work is the same. The invention can short-circuit the power unit with the fault when the power unit has the fault, thereby ensuring that the SVG does not have fault shutdown and continuously and reliably runs.
Description
Technical Field
The invention relates to the technical field of SVG equipment fault removal, in particular to an alternating current contactor, and a fault removal system and method of SVG.
Background
In a power distribution network, the power quality of a power grid is generally measured by indexes such as stability, symmetry and sine, and the power supply quality of the power grid is seriously influenced along with the fact that nonlinear loads such as modern power electronic equipment are connected to the power grid in a large quantity. Therefore, a high voltage Static Var Generator (SVG) is generated by itself. The power unit is an important component of the SVG and is one of the core components of the SVG.
In the long-term operation of the SVG, the power unit may malfunction due to differences of electronic components inside the power unit. In the SVG equipment of old edition, power unit breaks down the back, can cause the SVG equipment to shut down immediately to need wait for maintenance personal before with the trouble power unit change back, the SVG equipment just can be put into operation again, and in this period of time that the maintenance personal changed before after the SVG shut down, the SVG equipment is in shutting down, can't continue to provide reactive power regulation to the electric wire netting.
Disclosure of Invention
The invention aims to provide a fault removing system and a fault removing method for an alternating current contactor and SVG (static var generator), which can short-circuit a power unit with a fault when the power unit has the fault, and ensure that the SVG does not have fault shutdown and continuously and reliably runs. In order to achieve the above object, an embodiment of the present invention provides an ac contactor disposed in a power unit of SVG, the ac contactor including: a mechanical bypass controller and a contactor for closing to short circuit the power unit; wherein,
the mechanical bypass controller can drive when the power unit breaks down the contactor is closed, so that the power unit is short-circuited and the SVG device can receive the direct voltage which is the same as the direct voltage required by the normal work of the SVG device.
Preferably, the mechanical bypass controller is configured to be in series with the controller of the SVG device via optical fiber.
In addition, the invention also provides a fault removing method of the SVG, which uses the plurality of AC contactors and comprises the following steps:
receiving a fault signal of a power unit of any phase which has failed;
sending a closing instruction to the mechanical bypass controller, so that the mechanical bypass controller drives the contactor to close to short-circuit the power unit with the fault, and drives the contactors corresponding to other phase fault units associated with the power unit with the fault to close to short-circuit the power unit with the fault; and
and controlling the residual power units after the short circuit is completed to provide direct voltage for the SVG equipment, so that the direct voltage received by the SVG equipment is the same as the direct voltage required by the normal work of the SVG equipment.
Preferably, the controlling the power units remaining after the short circuit is completed to provide the direct voltage to the SVG device includes:
for the phase that has failed,
acquiring the direct voltage provided by the power unit with the fault before the fault; and equally dividing the direct voltage to each power unit which does not have faults so that the direct voltage provided by each power unit can reach a target voltage value;
for the other phases that do not fail,
and enabling the direct voltage provided by each power unit which is not short-circuited to reach the target voltage value, so that the direct voltage provided by the phase which has the fault and the other phases which have no fault can support the normal work of the SVG device.
Preferably, the driving the contactors corresponding to the other phase fault units associated with the power unit having the fault to close to short-circuit includes:
acquiring a one-to-one corresponding relation of each power unit in the pre-configured three phases;
determining other phase power units corresponding to the power unit which has sent the fault according to the corresponding relation; and
and controlling the contactors corresponding to the other phase power units to be switched on, so that the other phase power units are in short circuit.
Preferably, the method for removing the fault of the SVG further includes:
receiving a signal reflecting the switching value of the contactor collected by the mechanical bypass controller; and
and when the signal of the switching value shows that the power units with the short circuit faults are short-circuited, executing the step of equally dividing the direct voltage to the power units without the faults to obtain the target voltage of each power unit.
Preferably, the receiving the signal reflecting the switching value of the contactor collected by the mechanical bypass controller includes:
sending an inquiry instruction of the switching value of the contactor to the mechanical bypass controller, so that the mechanical bypass controller acquires a signal reflecting the switching value of the contactor; and
and receiving a signal reflecting the switching value of the contactor, which is collected by the mechanical bypass controller.
Preferably, the query instruction for sending the contactor switching value to the mechanical bypass controller includes:
sending a query instruction of the switching value of the contactor to the mechanical bypass controller at intervals of the fault query interval; wherein the preset fault query interval time is configured to be associated with a usage time of the SVG device.
Preferably, after the control of the power unit remaining after the short circuit is completed to provide the direct voltage to the SVG device, so that the direct voltage received by the SVG device is the same as the direct voltage required by the SVG device to normally operate, the method for removing the fault in the SVG further includes:
and when the fault signal of the power unit of any phase with the fault is continuously received, the SVG device is controlled to stop.
In addition, the present invention provides a fault removal system for SVG using the plurality of ac contactors, including:
a fault receiving unit that receives a fault signal of a power unit of any one phase in which a fault has occurred;
the instruction sending unit is used for sending a closing instruction to the mechanical bypass controller, so that the mechanical bypass controller drives the contactor to close to short-circuit the power unit with the fault and drives the contactors corresponding to other phase fault units related to the power unit with the fault to close to short-circuit; and
and the power unit control unit is used for controlling the residual power units after the short circuit is completed to provide direct voltage for the SVG equipment, so that the direct voltage received by the SVG equipment is the same as the direct voltage required by the normal work of the SVG equipment.
Preferably, the power unit control unit includes:
for the phase that has failed,
the direct voltage acquisition module is used for acquiring the direct voltage provided by the power unit which has failed before the failure; and
and the direct voltage sharing module is used for sharing the direct voltage to each power unit which does not have a fault so that the direct voltage provided by each power unit can reach a target voltage value.
For the other phases that do not fail,
and the voltage adjusting module is used for adjusting the direct voltage provided by each power unit which is not short-circuited to the target voltage value, so that the direct voltages provided by the phase which has the fault and the other phases which have no fault can support the normal work of the SVG device.
Preferably, the instruction transmitting unit includes:
the relation acquisition module is used for acquiring the one-to-one corresponding relation of each power unit in the pre-configured three phases;
the other-phase power unit determining module is used for determining other-phase power units corresponding to the power unit which has sent the fault according to the corresponding relation; and
and the other contactor control module is used for controlling the contactors corresponding to the other phase power units to be switched on so as to enable the other phase power units to be in short circuit.
Preferably, the fault removal system of the SVG further includes:
the signal receiving unit is used for receiving a signal which reflects the switching value of the contactor and is collected by the mechanical bypass controller;
and the direct voltage sharing module is used for performing the step of sharing the direct voltage to the power units without faults to obtain the target voltage of each power unit when the signal of the switching value shows that the power units with faults are short-circuited.
Preferably, the signal receiving unit includes:
the command sending module is used for sending an inquiry command of the switching value of the contactor to the mechanical bypass controller so as to enable the mechanical bypass controller to collect a signal reflecting the switching value of the contactor; and
and the signal receiving module is used for receiving the signal which reflects the switching value of the contactor and is collected by the mechanical bypass controller.
Preferably, the instruction sending module is configured to send an inquiry instruction of the contactor switching value to the mechanical bypass controller, and the inquiry instruction includes:
the command sending module is used for sending a query command of the switching value of the contactor to the mechanical bypass controller every the fault query interval time; wherein the preset fault query interval time is configured to be associated with a usage time of the SVG device.
Preferably, after the control of the power unit remaining after the short circuit is completed provides a direct voltage to the SVG device, so that the direct voltage received by the SVG device is the same as a direct voltage required by the SVG device to normally operate, the fault removal system of the SVG further includes:
and the shutdown control unit is used for controlling the SVG equipment to be shut down when the fault signal of the power unit of any phase with the fault is continuously received.
Through above-mentioned technical scheme, can be under the condition that arbitrary power unit breaks down, short circuit this power unit for SVG equipment can receive with the required direct voltage of the normal work of SVG equipment realizes then the normal operating of SVG equipment by the direct voltage the same, and the trouble does not take place to shut down during SVG, has guaranteed to last reliable operation.
Additional features and advantages of embodiments of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the embodiments of the invention without limiting the embodiments of the invention. In the drawings:
fig. 1 is a schematic view illustrating a structure of an ac contactor according to the present invention;
fig. 2 is a flowchart illustrating a fault removal method of SVG of an ac contactor according to the present invention; and
fig. 3 is a block diagram of a fault removal system of SVG of the present invention.
Description of the reference numerals
1. Copper bars; 2. a contactor; 3. a mechanical bypass controller.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating embodiments of the invention, are given by way of illustration and explanation only, not limitation.
Fig. 1 is a schematic structural diagram of an ac contactor according to the present invention, which is configured on a power unit of SVG as shown in fig. 1, and includes: a mechanical bypass controller 3 and a contactor 2 for closing to short-circuit the power unit; wherein, machinery bypass controller 3 can be in the drive when power unit breaks down contactor 2 closes a floodgate for the power unit's that has broken down short circuit just makes the SVG equipment can receive with the required direct voltage of SVG equipment normal work is the same. Wherein, the control of contactor can be realized to mechanical bypass controller 3, and whole structure is attached on the SVG equipment. According to the invention, a copper bar is led out from a power unit part of the SVG device, and then the power unit part is electrically connected with the AC contactor. Once a power unit fault occurs, the contactor 2 can be directly driven to be switched on, and the situation that the continuous normal operation of the SVG is influenced after the power unit fault is avoided. It should be noted that SVG generally has three phases, each phase having a plurality of power units, for example, 10, each having an ac contactor.
Preferably, the mechanical bypass controller is configured to be in series with the controller of the SVG device via optical fiber. The mechanical bypass main control boards are connected with the controller of the SVG in series through optical fibers and are separated from optical fiber communication carried by the power unit, and the mechanical bypass control boards 3 are controlled through dial switch address series communication.
Preferably, the mechanical bypass controller 3 and the contactor 2 are connected in series and then connected in parallel with the power unit in a power supply loop of the power unit. Each mechanical bypass is provided with a mechanical alternating current contactor and is connected in parallel to the alternating current bus side of the power unit through a copper bar 1, a driving power supply of the alternating current contactor does not need an external power supply to supply power independently, power is obtained from the corresponding power unit supporting capacitor side, and adjacent mechanical bypass controllers 3 are connected in parallel to supply power.
In addition, the present invention also provides a fault removal method for SVG, as shown in fig. 2, using the plurality of ac contactors, the fault removal method for SVG including:
s201, receiving a fault signal of a power unit of any phase with a fault; the fault signal is determined according to the operating state of the power unit, for example, whether the power unit has a fault or not may be determined by obtaining the voltage and current information of the power unit, and once the fault occurs, the fault signal may be directly received. As described above, there are multiple power cells per phase. The invention is only applicable to the condition that one power unit fails.
And S202, sending a closing instruction to the mechanical bypass controller, so that the mechanical bypass controller drives the contactor to close to short-circuit the power unit with the fault, and drives the contactors corresponding to other fault units associated with the power unit with the fault to close to short-circuit. The switching-on instruction is used for controlling the switching-on operation of the mechanical bypass controller, so that the power unit is in short circuit and cannot be powered, and the phenomenon that the whole SVG device cannot work due to the fact that the power unit cannot be powered is avoided. Taking three phases a, b and c as an example, when a fault occurs in the power unit 2 in the phase a (10 power units are named as 1-10), the power unit 2 in the phase b (corresponding to the phase a) is also directly short-circuited, and similarly, the power unit 2 in the phase c is also short-circuited, and if the three are related, one short-circuit directly short-circuits the other three.
S203, controlling the residual power units after the short circuit is completed to provide direct voltage for the SVG device, so that the direct voltage received by the SVG device is the same as the direct voltage required by the normal work of the SVG device. The direct voltage required by the normal work of the SVG equipment is acquired when the SVG equipment works normally. Specifically, it is determined according to actual conditions. The power unit after the short circuit is completed is a power unit which needs to provide direct voltage.
Preferably, the controlling the power units which are remained after the short circuit is completed and have no fault to provide the direct voltage for the SVG device comprises:
aiming at the phase with the fault, acquiring the direct voltage provided by the power unit with the fault before the fault; and equally dividing the direct voltage to each power unit which does not have faults so that the direct voltage provided by each power unit can reach a target voltage value;
and aiming at other phases which do not have faults, adjusting the direct voltage provided by each power unit which is not short-circuited to the target voltage value, so that the direct voltages provided by the phase which has faults and the other phases which do not have faults can support the normal work of the SVG device. This mode makes SVG equipment can continue steady operation, and SVG does not break down and shut down during the period, has guaranteed to last reliable operation. Different direct voltage control strategies are adopted for different phases, as shown above, if the power unit is phase 2 in phase a, the power units of phase 2 in phase b and phase c are both short-circuited, then the supply of direct voltage is considered, and the remaining 9 are used for equally dividing the original 10 voltage values.
Preferably, the driving the contactors corresponding to the other phase fault units associated with the power unit having the fault to close to short-circuit includes:
acquiring a one-to-one corresponding relation of each power unit in the pre-configured three phases; for example, all of them are No. 2, and they may be associated with addresses, and the position of No. 1 is the associated power cell.
And determining other phase power units corresponding to the power unit which has sent the fault according to the corresponding relation.
And controlling the contactors corresponding to the other phase power units to be switched on, so that the other phase power units are in short circuit.
Preferably, the method for removing the fault of the SVG may further include: and receiving a signal reflecting the switching value of the contactor, which is collected by the mechanical bypass controller. And when the signal of the switching value shows that the power units with the short circuit faults are short-circuited, executing the step of equally dividing the direct voltage to the power units without the faults to obtain the target voltage of each power unit. For example, when the voltage supplied by the failed power unit before the failure is aV, after the failure occurs, the remaining two normally operating power units share a/2 voltage respectively, so that the voltage supplied by the whole power unit can still reach the direct voltage required by the normal operation of the SVG device.
Preferably, the receiving the signal reflecting the switching amount of the contactor collected by the mechanical bypass controller may include: sending an inquiry instruction of the switching value of the contactor to the mechanical bypass controller, so that the mechanical bypass controller acquires a signal reflecting the switching value of the contactor; and receiving a signal reflecting the switching value of the contactor, which is collected by the mechanical bypass controller. Specifically, the query instruction may be as follows:
the sending of the inquiry command of the contactor switching value to the mechanical bypass controller comprises:
sending a query instruction of the switching value of the contactor to the mechanical bypass controller at intervals of the fault query interval; wherein the preset fault query interval time is configured to be associated with a usage time of the SVG device. Wherein, the service time of the SVG device is 1 year, and the query interval time is 1 day every fault; the service time of the SVG device is 2 years, the interval time of fault inquiry is 12h, and the longer the service time is, the shorter the interval time of fault inquiry is.
Preferably, after the control of the power unit remaining after the short circuit is completed to provide the direct voltage to the SVG device, so that the direct voltage received by the SVG device is the same as the direct voltage required by the SVG device to normally operate, the method for removing the fault in the SVG further includes:
and when the fault signal of the power unit of any phase with the fault is continuously received, the SVG device is controlled to stop. As described above, the present invention is used only for a scenario in which one fault occurs per phase.
In addition, the present invention also provides a fault removal system of an SVG, as shown in fig. 3, using the above-mentioned plurality of ac contactors, the fault removal system of the SVG including:
a fault receiving unit that receives a fault signal of a power unit of any one phase in which a fault has occurred;
the instruction sending unit is used for sending a closing instruction to the mechanical bypass controller, so that the mechanical bypass controller drives the contactor to close to short-circuit the power unit with the fault and drives the contactors corresponding to other phase fault units related to the power unit with the fault to close to short-circuit; and
and the power unit control unit is used for controlling the residual power units after the short circuit is completed to provide direct voltage for the SVG equipment, so that the direct voltage received by the SVG equipment is the same as the direct voltage required by the normal work of the SVG equipment.
Preferably, the power unit control unit includes:
for the phase that has failed,
the direct voltage acquisition module is used for acquiring the direct voltage provided by the power unit which has failed before the failure; and
and the direct voltage sharing module is used for sharing the direct voltage to each power unit which does not have a fault so that the direct voltage provided by each power unit can reach a target voltage value.
For the other phases that do not fail,
and the voltage adjusting module is used for adjusting the direct voltage provided by each power unit which is not short-circuited to the target voltage value, so that the direct voltages provided by the phase which has the fault and the other phases which have no fault can support the normal work of the SVG device.
Preferably, the instruction transmitting unit includes:
the relation acquisition module is used for acquiring the one-to-one corresponding relation of each power unit in the pre-configured three phases;
the other-phase power unit determining module is used for determining other-phase power units corresponding to the power unit which has sent the fault according to the corresponding relation; and
and the other contactor control module is used for controlling the contactors corresponding to the other phase power units to be switched on so as to enable the other phase power units to be in short circuit.
Preferably, the fault removal system of the SVG further includes:
the signal receiving unit is used for receiving a signal which reflects the switching value of the contactor and is collected by the mechanical bypass controller;
and the direct voltage sharing module is used for performing the step of sharing the direct voltage to the power units without faults to obtain the target voltage of each power unit when the signal of the switching value shows that the power units with faults are short-circuited.
Preferably, the signal receiving unit includes:
the command sending module is used for sending an inquiry command of the switching value of the contactor to the mechanical bypass controller so as to enable the mechanical bypass controller to collect a signal reflecting the switching value of the contactor; and
and the signal receiving module is used for receiving the signal which reflects the switching value of the contactor and is collected by the mechanical bypass controller.
Preferably, the instruction sending module is configured to send an inquiry instruction of the contactor switching value to the mechanical bypass controller, and the inquiry instruction includes:
the command sending module is used for sending a query command of the switching value of the contactor to the mechanical bypass controller every the fault query interval time; wherein the preset fault query interval time is configured to be associated with a usage time of the SVG device.
Preferably, after the control of the power unit remaining after the short circuit is completed provides a direct voltage to the SVG device, so that the direct voltage received by the SVG device is the same as a direct voltage required by the SVG device to normally operate, the fault removal system of the SVG further includes:
and the shutdown control unit is used for controlling the SVG equipment to be shut down when the fault signal of the power unit of any phase with the fault is continuously received.
Compared with the prior art, the fault removing system of the SVG has the same distinguishing technical characteristics and technical effects as the fault removing method of the SVG, and is not repeated herein.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
In a typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.
The memory may include forms of volatile memory in a computer readable medium, Random Access Memory (RAM) and/or non-volatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM). The memory is an example of a computer-readable medium.
Computer-readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, a computer readable medium does not include a transitory computer readable medium such as a modulated data signal and a carrier wave.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The above are merely examples of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (10)
1. An ac contactor, wherein the ac contactor is provided in a power unit of SVG, the ac contactor comprising: a mechanical bypass controller and a contactor for closing to short circuit the power unit; wherein,
the mechanical bypass controller can drive when the power unit breaks down the contactor is closed, so that the power unit is short-circuited and the SVG device can receive the direct voltage which is the same as the direct voltage required by the normal work of the SVG device.
2. The ac contactor as claimed in claim 1, wherein said mechanical bypass controller is configured to be connected in series with a controller of said SVG device via optical fiber.
3. A fault removal method for SVG, using the plurality of ac contactors of any one of claims 1-2, comprising:
receiving a fault signal of a power unit of any phase which has failed;
sending a closing instruction to the mechanical bypass controller, so that the mechanical bypass controller drives the contactor to close to short-circuit the power unit with the fault, and drives the contactors corresponding to other phase fault units associated with the power unit with the fault to close to short-circuit the power unit with the fault; and
and controlling the residual power units after the short circuit is completed to provide direct voltage for the SVG equipment, so that the direct voltage received by the SVG equipment is the same as the direct voltage required by the normal work of the SVG equipment.
4. The method of trouble shooting in SVG according to claim 3, wherein said controlling the power units remaining after completion of the short circuit to supply a direct voltage to the SVG device includes:
for the phase that has failed,
acquiring the direct voltage provided by the power unit with the fault before the fault; and equally dividing the direct voltage to each power unit which does not have faults so that the direct voltage provided by each power unit can reach a target voltage value;
for the other phases that do not fail,
and adjusting the direct voltage provided by each power unit which is not short-circuited to the target voltage value, so that the direct voltages provided by the phase which has the fault and the other phases which have no fault can support the normal work of the SVG device.
5. The fault removal method for SVG according to claim 3, wherein said driving contactors corresponding to other phase fault units associated with the power unit having a fault to close to short-circuit comprises:
acquiring a one-to-one corresponding relation of each power unit in the pre-configured three phases;
determining other phase power units corresponding to the power unit which has sent the fault according to the corresponding relation; and
and controlling the contactors corresponding to the other phase power units to be switched on, so that the other phase power units are in short circuit.
6. The fault removal method for SVG according to claim 4, further comprising:
receiving a signal reflecting the switching value of the contactor collected by the mechanical bypass controller; and
and when the signal of the switching value shows that the power units with the short circuit faults are short-circuited, executing the step of equally dividing the direct voltage to the power units without the faults to obtain the target voltage of each power unit.
7. The method of trouble shooting in SVG according to claim 6, wherein said receiving a signal reflecting a switching amount of said contactor collected from said mechanical bypass controller includes:
sending an inquiry instruction of the switching value of the contactor to the mechanical bypass controller, so that the mechanical bypass controller acquires a signal reflecting the switching value of the contactor; and
and receiving a signal reflecting the switching value of the contactor, which is collected by the mechanical bypass controller.
8. The method of trouble shooting of SVG according to claim 7, wherein said sending of the inquiry command of contactor switching amount to said mechanical bypass controller comprises:
sending a query instruction of the switching value of the contactor to the mechanical bypass controller at intervals of the fault query interval; wherein the preset fault query interval time is configured to be associated with a usage time of the SVG device.
9. The fault removal method for SVG according to claim 3, wherein after the power unit remaining after the completion of the control short circuit supplies a direct voltage to the SVG device so that the direct voltage received by the SVG device is the same as a direct voltage required for the SVG device to operate normally, the fault removal method for SVG further comprises:
and when the fault signal of the power unit of any phase with the fault is continuously received, the SVG device is controlled to stop.
10. A fault removal system for SVG, using the plurality of ac contactors of any one of claims 1-2, comprising:
a fault receiving unit that receives a fault signal of a power unit of any one phase in which a fault has occurred;
the instruction sending unit is used for sending a closing instruction to the mechanical bypass controller, so that the mechanical bypass controller drives the contactor to close to short-circuit the power unit with the fault and drives the contactors corresponding to other phase fault units related to the power unit with the fault to close to short-circuit; and
and the power unit control unit is used for controlling the residual power units after the short circuit is completed to provide direct voltage for the SVG equipment, so that the direct voltage received by the SVG equipment is the same as the direct voltage required by the normal work of the SVG equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111664921.4A CN114243725A (en) | 2021-12-31 | 2021-12-31 | Fault removal system and method for alternating current contactor and SVG |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111664921.4A CN114243725A (en) | 2021-12-31 | 2021-12-31 | Fault removal system and method for alternating current contactor and SVG |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114243725A true CN114243725A (en) | 2022-03-25 |
Family
ID=80745046
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111664921.4A Pending CN114243725A (en) | 2021-12-31 | 2021-12-31 | Fault removal system and method for alternating current contactor and SVG |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114243725A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201821274U (en) * | 2010-10-08 | 2011-05-04 | 广州智光电机有限公司 | High voltage frequency converter with DC voltage-adjustable power units |
| CN102255603A (en) * | 2011-07-27 | 2011-11-23 | 广州智光电气股份有限公司 | Comprehensive control system and method based on high voltage motor control and reactive power compensation |
| CN104953806A (en) * | 2014-08-23 | 2015-09-30 | 希望森兰科技股份有限公司 | Power-consumption-free bypass apparatus of cascaded-power-unit-based high-voltage inverter and control method thereof |
| 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 |
| CN113036922A (en) * | 2021-03-18 | 2021-06-25 | 南京南瑞继保电气有限公司 | Control method and device of modular multilevel converter system |
| CN114336661A (en) * | 2021-12-30 | 2022-04-12 | 安徽佑赛科技股份有限公司 | H-bridge mechanical bypass control circuit, control method and system |
-
2021
- 2021-12-31 CN CN202111664921.4A patent/CN114243725A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201821274U (en) * | 2010-10-08 | 2011-05-04 | 广州智光电机有限公司 | High voltage frequency converter with DC voltage-adjustable power units |
| CN102255603A (en) * | 2011-07-27 | 2011-11-23 | 广州智光电气股份有限公司 | Comprehensive control system and method based on high voltage motor control and reactive power compensation |
| CN104953806A (en) * | 2014-08-23 | 2015-09-30 | 希望森兰科技股份有限公司 | Power-consumption-free bypass apparatus of cascaded-power-unit-based high-voltage inverter and control method thereof |
| 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 |
| CN113036922A (en) * | 2021-03-18 | 2021-06-25 | 南京南瑞继保电气有限公司 | Control method and device of modular multilevel converter system |
| CN114336661A (en) * | 2021-12-30 | 2022-04-12 | 安徽佑赛科技股份有限公司 | H-bridge mechanical bypass control circuit, control method and system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10935945B2 (en) | Methods and apparatus for power generation and distribution | |
| US10968891B2 (en) | Method of controlling active power generation of a wind power plant and wind power plant | |
| CN102474131B (en) | Comprehensive monitoring and control system for smart grid and microgrid | |
| CN105659461A (en) | Method for controlling wind power plant and wind power plant | |
| CN102687094A (en) | Processing method and appliance for multi-power supply | |
| US10622807B2 (en) | Power source redundancy in a power supply | |
| KR20100027321A (en) | Power control method for secondary batteries | |
| KR101545136B1 (en) | Method and System for controlling generator output of islanded microgrids | |
| CN102231533A (en) | Parallel grid-connected inverter system and switch control method | |
| CN113131518A (en) | MLPE photovoltaic system and MLPE equipment detection method thereof | |
| CN104201407A (en) | Control system of flow battery system based on DCS and flow battery system | |
| US9148070B2 (en) | High power control system and control method thereof | |
| CN106452143B (en) | The hot redundancy strategy of modularization multi-level converter MMC based on phase-shifting carrier wave | |
| CN114243725A (en) | Fault removal system and method for alternating current contactor and SVG | |
| CN102983623A (en) | Emergency power supply auto switch over intertripping load method | |
| KR101516027B1 (en) | Battery Energy Storage System and Method for Controlling That System | |
| CN103238258A (en) | Reactive power compensator, computer programs and computer program products | |
| CN111162543B (en) | Hybrid reactive power compensation control method | |
| CN114336661A (en) | H-bridge mechanical bypass control circuit, control method and system | |
| RU195195U1 (en) | REACTIVE POWER COMPENSATION DEVICE | |
| EP4176505A1 (en) | Battery testing in operation | |
| JP2013118786A (en) | Power storage device | |
| CN107872061A (en) | A kind of Intelligent program controlled combines rotation formula power-less compensation control method | |
| RU2713213C1 (en) | Automatic reactive power compensation device | |
| US9762086B1 (en) | Switchless power source redundancy |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |