CN208078639U - A kind of multiterminal coordination control and protection system of flexible direct current power grid - Google Patents
A kind of multiterminal coordination control and protection system of flexible direct current power grid Download PDFInfo
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- CN208078639U CN208078639U CN201820418799.XU CN201820418799U CN208078639U CN 208078639 U CN208078639 U CN 208078639U CN 201820418799 U CN201820418799 U CN 201820418799U CN 208078639 U CN208078639 U CN 208078639U
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Abstract
The utility model discloses a kind of multiterminal of flexible direct current power grid to coordinate control and protection system; multiterminal cooperative control device, pole control device, electrode protector, busbar protective device, line protective devices, direct current station control device, Exchange Station control device, grounding resistance monitoring device, the change of current become protective device, exchange energy-consuming device and stable control device and are connect with controlling bus, therefore data sharing may be implemented between each other in system.Multiterminal, which coordinate control and protection system, to carry out voltage and power control to the whole network; realize the real-time guard to equipment such as busbar, DC line, change of current changes; and; when the locking of isolated island sending end monopole or receiving end change of current station failure occur for flexible direct current power grid; when causing new energy that can not send outside; transient state energy is absorbed in short-term by exchanging energy-consuming device input; then new energy is carried out to cut machine by pacifying control, to effectively contain the problems such as new energy can not send caused power grid overload and power surplus outside under flexible direct current power grid decoupled mode.
Description
Technical field
The utility model is related to technical field of power systems, more specifically, being related to a kind of multiterminal of flexible direct current power grid
Coordinate control and protection system.
Background technology
Flexible direct current power grid be it is a kind of interconnected by DC line with dc switch in DC side by multiple transverters, and
With netted electrical power transmission system.Flexible direct current power grid can realize trend distribution and control in a wide range of, can enhance entire
The flexibility of system and reliability, and the capacity of redundancy is provided for electric system by resource-sharing.
In flexible direct current power grid, the device fails such as busbar, DC line, transverter, the change of current become may cause
Power grid transmission power is limited.Distinguishingly, when the locking of isolated island sending end monopole or receiving end current conversion station catastrophe failure occurs, it may occur that new
The energy can not send outside caused by grid power surplus, so as to cause power grid overload, the problems such as causing component damage.
Utility model content
In view of this, the utility model discloses a kind of multiterminal coordination control and protection system of flexible direct current power grid, to solve flexibility
The problems such as overtension or power surplus, occurs under decoupled mode for DC grid, to avoid the damage of direct current device.
A kind of multiterminal coordination control and protection system of flexible direct current power grid, the multiterminal coordinate input terminal and the operation of control and protection system
Personnel control equipment side connects, and the output end that the multiterminal coordinate control and protection system is connect with site measuring and control equipment side；
The multiterminal coordinate control and protection system：Multiterminal cooperative control device, valve control layer segment, pole control layer segment and double
Pole controls layer segment, and the pole control layer segment includes：Positive control and protection system and cathode control and protection system, the anode control and protection system
It is separately connected a control valve device with the cathode control and protection system；
The anode control and protection system is identical with the configuration of the cathode control and protection system, including：Multiterminal cooperative control device, pole
Control device, electrode protector, busbar protective device and line protective devices；
The multiterminal cooperative control device connects with controlling bus and our station and the pole control device at other stations respectively
It connects, the multiterminal cooperative control device takes over for realizing DC voltage control, scope control and tide optimization function；
The pole control device respectively with the controlling bus, the valve arrangement, the electrode protector, the busbar
Protective device, alternating-current switch are connected with site measuring and control equipment side, and the pole control device is for the valve control to our station
Device is controlled, and has the function of our station dc circuit breaker；
The electrode protector connects with the controlling bus, the alternating-current switch and site measuring and control equipment side respectively
It connects, the electrode protector is for realizing the protection of rheology and connecting line is exchanged, by two from three device after protection act
Jump this side dc circuit breaker；
The busbar protective device respectively with controlling bus, the line protective devices, the alternating-current switch and described existing
The connection of field measuring and controlling equipment side, the busbar protective device are realized for being protected to pole busbar and jump all of this side institute band
Breaker, and acted in the breaker failure, and failure signal is transferred to the pole control device, it at the same time, will
The failure signal is transferred to the line protective devices, and the line protective devices is made to carry out remote jump opposite end；
The line protective devices are connect with the controlling bus and the site measuring and control equipment respectively, the route protection
Breaker is jumped when device is for realizing line fault, DC line is protected, and is sent far to opposite end line protective devices
Function is looked into the distance, and exports failure signal to the busbar protective device in action；
The bipolar control layer segment includes：Direct current station control device, Exchange Station control device, grounding resistance monitoring device,
The change of current becomes protective device, exchange energy-consuming device and stable control device；
The direct current station control device connects with the controlling bus, the pole control device and the site measuring and control equipment respectively
Connect, direct current station control device be used for the dc circuit breaker interface and DC fields of site measuring and control equipment side be monitored with
Control；
The Exchange Station control device respectively with the controlling bus, the pole control device and the site measuring and control equipment
Connection, the Exchange Station control device is for realizing the monitoring for exchanging field circuit breaker, the control to site measuring and control equipment side
And order interlocking；
The grounding resistance monitoring device is connect with the controlling bus, and the grounding resistance monitoring device is changed for monitoring
The earth point at station is flowed, and passes through data bus transmission Grounding；
The change of current becomes protective device and is connect with the controlling bus, and the change of current becomes protective device and becomes for realizing the change of current
Equipment protection；
The exchange energy-consuming device is connect with the controlling bus, and the exchange energy-consuming device consumes energy for realizing to exchange
Control is moved back in the throwing of device；
The stable control device is connect with the controlling bus, and the stable control device cuts machine for realizing new energy
The function of control.
Preferably, the line protective devices are configured with independent high-frequency communication link, and the line protective devices pass through
The high-frequency communication link exports actuating signal to the dc circuit breaker of site measuring and control equipment side.
Preferably, the pole control layer segment further includes：First exchanger, the pole control device, pole protection dress
It sets, the busbar protective device and the line protective devices are connect by first exchanger with the controlling bus.
Preferably, the bipolar control layer segment further includes：Second exchanger, the direct current station control device, the exchange
Stand control device, the grounding resistance monitoring device, the change of current become protective device, the exchange energy-consuming device and described stable
Control device is connect by second exchanger with the controlling bus.
From above-mentioned technical solution it is found that coordinating control the utility model discloses a kind of multiterminal of flexible direct current power grid protects system
System, in the system, multiterminal cooperative control device, pole control device, electrode protector, busbar protective device, line protective devices,
Control device, Exchange Station control device, grounding resistance monitoring device, change of current change protective device, exchange energy-consuming device and peace in direct current station
Steady control device is connect with controlling bus, therefore data sharing may be implemented between each other.In this way, multiterminal coordinate control and protection system
Voltage and power control can be carried out to the whole network, realize the real-time guard to equipment such as busbar, DC line, change of current changes, also,
When the generation isolated island sending end monopole locking of flexible direct current power grid or receiving end change of current station failure pass through when causing new energy that can not send outside
Exchange energy-consuming device input absorbs transient state energy in short-term, then carries out cutting machine to new energy by pacifying control, soft to effectively contain
Property DC grid decoupled mode under new energy can not send outside caused by power grid overload and the problems such as power surplus, and then keep away
The damage of direct current device is exempted from.
Description of the drawings
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is the embodiments of the present invention, for those of ordinary skill in the art, without creative efforts, also
Other attached drawings can be obtained according to disclosed attached drawing.
Fig. 1 shows for a kind of structure that the multiterminal of flexible direct current power grid coordinate control and protection system disclosed in the utility model embodiment
It is intended to；
Fig. 2 is that the multiterminal of another flexible direct current power grid disclosed in the utility model embodiment coordinate the structure of control and protection system
Schematic diagram.
Specific implementation mode
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
The every other embodiment obtained, shall fall within the protection scope of the present invention.
The utility model embodiment discloses a kind of multiterminal coordination control and protection system of flexible direct current power grid, flexible straight to solve
The problems such as overtension or power surplus, occurs under decoupled mode for galvanic electricity net, to avoid the damage of direct current device.
Referring to Fig. 1, a kind of knot of the multiterminal coordination control and protection system of flexible direct current power grid disclosed in the utility model embodiment
Structure schematic diagram, the control and protection system 10 are suitable for the control and protection of the soft straight current conversion station of multiterminal super-pressure, that is to say, that control and protection system
10 function is the control and protection realized to entire flexible direct current power grid, in practical applications, the input terminal of control and protection system 10
It is connect with operator control equipment side 20, the output end of control and protection system 10 is connect with site measuring and control equipment side 30；
Wherein, operator control equipment side 20 includes：Server 21, operations staff's work station 22, head of a station's work station 23
With engineer work station 24 etc.；
Site measuring and control equipment 30 includes：MMC (modularization multi-level converter) submodule 31, interface 32 (including the valve Room, valve
Cold and connection becomes interface), dc circuit breaker 33, DC fields interface 34 and DC fields interface 35 on the spot on the spot, wherein MMC is to change
The nucleus module of device is flowed, rectification and inversion are used for, to realize transmission power；Dc circuit breaker 33 is used for tripping isolation event when failure
Barrier.
Specifically：
Control and protection system 10 includes：Multiterminal cooperative control device 111, valve control layer segment, pole control layer segment and bipolar control
Layer segment 120, valve control layer segment include：Two control valve devices 113 (control valve device 113 is only shown in Fig. 1), pole control
Preparative layer part includes：Positive control and protection system and cathode control and protection system, positive control and protection system and cathode control and protection system are separately connected one
A control valve device 113 a, that is to say, that control valve device 113 in positive control and protection system connection valve control layer segment, cathode
Another control valve device 113 in control and protection system connection valve control layer segment.
Positive it should be strongly noted that although positive control and protection system and cathode control and protection system correspond to different pole
Control and protection system is identical with the configuration of cathode control and protection system, therefore, is closed for convenience of the connection for describing 10 each component part of control and protection system
It is positive (negative) the pole control and protection system only shown in Fig. 1, including：Pole control device 112, electrode protector 114, bus protection dress
Set 115 and line protective devices 116；And a valve arrangement 113 in valve control layer segment is only shown in Fig. 1；
The connection relation and operation principle that 110 each building block of layer segment is controlled below for pole, are described below：
Multiterminal cooperative control device 111 is directly connected to controlling bus, multiterminal cooperative control device 111 and our station and other
The pole control device 112 stood is connected by optical fiber, and multiterminal cooperative control device 111 takes over for realizing DC voltage control, model
Contain the functions such as system and tide optimization.
Pole control device 112 respectively with controlling bus, valve arrangement 113, electrode protector 114, busbar protective device
115, alternating-current switch 117 and site measuring and control equipment side 30 connect, and pole control device 112 is used for the (ratio of valve arrangement 113 to our station
Such as converter valve) it is controlled, and have the function of jumping our station dc circuit breaker.
Specifically, pole control device 112 is connected by the MMC submodules 31 of valve arrangement 113 and site measuring and control equipment side 30
Connect, pole control device 112 is connect by fieldbus with the interface 32 of site measuring and control equipment side 30, pole control device 112 with it is existing
The dc circuit breaker 33 of field measuring and controlling equipment side 30 is directly connected to, and pole control device 112 is protected with electrode protector 114 and busbar respectively
Protection unit 115 is connected by optical fiber, and electrode protector 114 is connect with alternating-current switch 117 by cable rigid line.
Electrode protector 114 is connect with controlling bus, site measuring and control equipment side 30 and alternating-current switch 117 respectively, pole protection
Device 114 has circuit (including exchange connecting line and the neutral conductor etc.) defencive function, and electrode protector 114 is for realizing to the change of current
Change and the protection of connecting line, this side dc circuit breaker 33 is jumped after protection act by two from three device.Wherein, " two from three
" three " in device " refer to device triple modular redundant arrangement, when there are two and apparatus above logic discrimination meet the requirements when, just outlet jump
Lock.
Specifically, in practical applications, electrode protector 114 and the dc circuit breaker 33 of site measuring and control equipment side 30 connect
It connects, electrode protector 114 is connect with alternating-current switch 117 by cable rigid line.
Busbar protective device 115 respectively with controlling bus, site measuring and control equipment side 30, line protective devices 116 and exchange
Switch 117 connects, and busbar protective device 115 is realized and jumps this side institute with all breakers, have for being protected to pole busbar
The standby holding function in breaker failure, and failure signal is transferred to pole control device 112 by optical fiber circuit.Also, it is female
Failure signal is also informed into line protective devices 116 by optical fiber simultaneously when line protective device 115 acts, makes line protective devices
116 carry out remote jump opposite end.
Specifically, busbar protective device 115 is connect with the dc circuit breaker 33 of site measuring and control equipment side 30, bus protection dress
115 are set to connect by cable rigid line with alternating-current switch 117.
Line protective devices 116 are connect with controlling bus and site measuring and control equipment side 30 respectively, and line protective devices 116 are used
Breaker is jumped when realizing line fault, DC line is protected, and is sent to opposite end line protective devices using channel
Failure signal can be also transferred to busbar protective device by the function of far jumping, line protective devices 116 while action by optical fiber
115。
Specifically, line protective devices 116 and the dc circuit breaker 33 of site measuring and control equipment side 30 are directly connected to, and circuit
Protective device 116 is also configured with independent high-frequency communication link, is exported actuating signal to direct current by the high-frequency communication link
Breaker 33 shortens actuation time to promote the reliability of protection.
Bipolar control layer segment 120 includes：Control device 121, Exchange Station control device 122, ground resistance monitoring in direct current station
Device 123, the change of current become protective device 124, exchange energy-consuming device 125 and stable control device 126；
Below for the connection relation and operation principle of bipolar control 120 each building block of layer segment, it is described below：
Direct current station control device 121 is connect with controlling bus, pole control device 112 and site measuring and control equipment 30 respectively, direct current
Control device 121 stand for 33 interface of dc circuit breaker and DC fields in site measuring and control equipment 30 to be monitored and controlled, and straight
Control device 121 in stream station is also equipped with the functions such as position switching.
Specifically, device 121 is controlled at direct current station passes through the DC fields of fieldbus and site measuring and control equipment 30 interface 34 on the spot
Connection.
Exchange Station control device 122 is connect with controlling bus, pole control device 112 and site measuring and control equipment 30 respectively, is handed over
Flow monitoring, control and order of the stand control device 122 for realizing the exchange field circuit breaker to site measuring and control equipment side
Interlocking etc..
Specifically, Exchange Station control device 122 is connect on the spot by fieldbus and the alternating-current field in site measuring and control equipment 30
Mouth 35 connects.
Grounding resistance monitoring device 123 is connect with controlling bus, and grounding resistance monitoring device 123 is for monitoring current conversion station
Earth point, and pass through data bus transmission Grounding.
The change of current becomes protective device 124 and is connect with controlling bus, becomes equipment protection for realizing the change of current.In practical applications,
The change of current becomes protective device 124 and is connect with controlling bus by bipolar control layer.
Exchange energy-consuming device 125 is connect with controlling bus, control is moved back for realizing to the throwing for exchanging energy-consuming device, in reality
In, exchange energy-consuming device 125 is connect by bipolar control layer with controlling bus.
Stable control device 126 is connect with controlling bus, and the function of machine control is cut for realizing new energy.In practical application
In, stable control device 126 is connect by bipolar control layer with controlling bus.
It should be strongly noted that in the present embodiment, there is permanent fault for exchange bonding pad, change of current change and busbar etc.
Or other failures, pole control device 112 and electrode protector 114, busbar protective device 115 are jumped by hard cable connection and are handed over
Flow the circuit of switch.
In the present embodiment, when the generation isolated island sending end monopole locking of flexible direct current power grid or receiving end catastrophe failure, lead to new energy
When source can not be sent outside, controlled by 112 pole of Exchange Station control device while to exchange energy-consuming device 125 and stable control device 126
Order is sent, exchange energy-consuming device 125 puts into after receiving order, consumes energy to surplus power, at this time stable control device 126 immediately
Action (only 126 movement speed of stable control device is slow) is also begun to, new energy is cut off, into new power-balance, thus from
It is basic to solve power grid overload because of caused by failure under island mode.
In summary, the multiterminal of flexible direct current power grid disclosed by the utility model coordinate control and protection system, and multiterminal coordinate control
Device 111, pole control device 112, electrode protector 114, busbar protective device 115, line protective devices 116, the control of direct current station
Device 121, Exchange Station control device 122, grounding resistance monitoring device 123, the change of current become protective device 124, exchange energy-consuming device
125 and stable control device 126 connect with controlling bus, therefore data sharing may be implemented between each other.In this way, multiterminal are assisted
Voltage and power control can be carried out to the whole network by regulating and controlling insurance system, be realized to the real-time of the equipment such as busbar, DC line, change of current change
Protection, also, when the generation isolated island sending end monopole locking of flexible direct current power grid or receiving end change of current station failure, cause new energy outer
When sending, transient state energy is absorbed in short-term by exchanging energy-consuming device input, then new energy is carried out to cut machine by pacifying control, to have
Power grid overload and power surplus etc. caused by new energy can not be sent outside under effect containment flexible direct current power grid decoupled mode are asked
Topic.
It should be noted that pole control device 112, electrode protector 114 in pole control layer segment 110, bus protection
Device 115 and line protective devices 116 are connect with controlling bus by interchanger.
Therefore, another flexible disclosed in the utility model embodiment in order to further optimize the above embodiments, referring to Fig. 2
The multiterminal of DC grid coordinate the structural schematic diagram of control and protection system, and described in Fig. 1 on the basis of embodiment, pole controls layer segment
110 further include：First exchanger 118, pole control device 112, electrode protector 114, busbar protective device 115 and route protection
Device 116 is connect by the first exchanger 118 with controlling bus.
It should be noted that it is bipolar control layer segment 120 in direct current station control device 121, Exchange Station control device 122,
It is logical that grounding resistance monitoring device 123, the change of current, which become protective device 124, exchange energy-consuming device 125 and stable control device 126,
Exchanger is crossed to connect with controlling bus.
Therefore, in order to further optimize the above embodiments, bipolar control layer segment 120 further includes：Second exchanger 127, directly
Stream station control device 121, Exchange Station control device 122, grounding resistance monitoring device 123, the change of current become protective device 124, exchange consumption
Energy device 125 and stable control device 126 are connect by the second exchanger 127 with controlling bus.
It should be strongly noted that referring to Fig. 2, the controlling bus in the application is especially by 3rd switch 130 and fortune
Administrative staff's control device side 20 connects.
Finally, it is to be noted that, herein, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant meaning
Covering non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only that
A little elements, but also include other elements that are not explicitly listed, or further include for this process, method, article or
The intrinsic element of equipment.In the absence of more restrictions, the element limited by sentence "including a ...", is not arranged
Except there is also other identical elements in the process, method, article or apparatus that includes the element.
Each embodiment is described by the way of progressive in this specification, the highlights of each of the examples are with other
The difference of embodiment, just to refer each other for identical similar portion between each embodiment.
The foregoing description of the disclosed embodiments enables professional and technical personnel in the field to realize or use this practicality new
Type.Various modifications to these embodiments will be apparent to those skilled in the art, and determine herein
The General Principle of justice can be realized in other embodiments without departing from the spirit or scope of the present utility model.Cause
This, the utility model is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein
The widest range consistent with features of novelty.
Claims (4)
1. a kind of multiterminal of flexible direct current power grid coordinate control and protection system, which is characterized in that the multiterminal coordinate the defeated of control and protection system
Enter end to connect with operator control equipment side, the multiterminal coordinate the output end of control and protection system and site measuring and control equipment side connects
It connects；
The multiterminal coordinate control and protection system：Multiterminal cooperative control device, valve control layer segment, pole control layer segment and bipolar control
Preparative layer part, the valve control layer segment include：Two control valve devices, the pole control layer segment include：Positive control and protection system
With cathode control and protection system, the anode control and protection system and the cathode control and protection system are separately connected a control valve device；
The anode control and protection system is identical with the configuration of the cathode control and protection system, including：Pole control device, electrode protector,
Busbar protective device and line protective devices；
The multiterminal cooperative control device is connect with the pole control device at controlling bus and our station and other stations respectively, institute
State multiterminal cooperative control device taken over for realizing DC voltage control, scope control and tide optimization function；
The pole control device respectively with the controlling bus, the valve arrangement, the electrode protector, the bus protection
Device, alternating-current switch are connected with site measuring and control equipment side, and the pole control device is used for the valve arrangement to our station
It is controlled, and has the function of our station dc circuit breaker；
The electrode protector is connect with the controlling bus, the alternating-current switch and site measuring and control equipment side respectively, institute
Protection of the electrode protector for realizing exchange rheology and connecting line is stated, this side is jumped by two from three device after protection act
Dc circuit breaker；
The busbar protective device is surveyed with controlling bus, the line protective devices, the alternating-current switch and the scene respectively
The connection of equipment side is controlled, the busbar protective device realizes all open circuits for jumping this side institute band for being protected to pole busbar
Device, and acted in the breaker failure, and failure signal is transferred to the pole control device, it at the same time, will be described
Failure signal is transferred to the line protective devices, and the line protective devices is made to carry out remote jump opposite end；
The line protective devices are connect with the controlling bus and the site measuring and control equipment respectively, the line protective devices
Breaker is jumped when for realizing line fault, DC line is protected, and work(is looked far into the distance to the transmission of opposite end line protective devices
Can, and export failure signal to the busbar protective device in action；
The bipolar control layer segment includes：Control device, Exchange Station control device, grounding resistance monitoring device, the change of current in direct current station
Become protective device, exchange energy-consuming device and stable control device；
The direct current station control device is connect with the controlling bus, the pole control device and the site measuring and control equipment respectively,
The direct current station control device is for being monitored and controlling to the dc circuit breaker interface and DC fields of site measuring and control equipment side
System；
The Exchange Station control device connects with the controlling bus, the pole control device and the site measuring and control equipment respectively
Connect, the Exchange Station control device for realizing to site measuring and control equipment side exchange field circuit breaker monitoring, control with
And order interlocking；
The grounding resistance monitoring device is connect with the controlling bus, and the grounding resistance monitoring device is for monitoring current conversion station
Earth point, and pass through data bus transmission Grounding；
The change of current becomes protective device and is connect with the controlling bus, and the change of current becomes protective device and becomes equipment for realizing the change of current
Protection；
The exchange energy-consuming device is connect with the controlling bus, and the exchange energy-consuming device is for realizing to exchanging energy-consuming device
Throwing move back control；
The stable control device is connect with the controlling bus, and the stable control device cuts machine control for realizing new energy
Function.
2. multiterminal according to claim 1 coordinate control and protection system, which is characterized in that the line protective devices are configured with only
Vertical high-frequency communication link, the line protective devices are exported actuating signal to the scene by the high-frequency communication link
The dc circuit breaker of measuring and controlling equipment side.
3. multiterminal according to claim 1 coordinate control and protection system, which is characterized in that the pole controls layer segment and further includes：
First exchanger, the pole control device, the electrode protector, the busbar protective device and the line protective devices are equal
It is connect with the controlling bus by first exchanger.
4. multiterminal according to claim 1 coordinate control and protection system, which is characterized in that the bipolar control layer segment also wraps
It includes：Second exchanger, direct current station control device, the grounding resistance monitoring device, described change the Exchange Station control device
Rheology protective device, the exchange energy-consuming device and the stable control device pass through second exchanger and the control
Bus connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820418799.XU CN208078639U (en) | 2018-03-27 | 2018-03-27 | A kind of multiterminal coordination control and protection system of flexible direct current power grid |
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| CN201820418799.XU CN208078639U (en) | 2018-03-27 | 2018-03-27 | A kind of multiterminal coordination control and protection system of flexible direct current power grid |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108233346A (en) * | 2018-03-27 | 2018-06-29 | 国网冀北电力有限公司检修分公司 | A kind of multiterminal of flexible direct current power grid coordinate control and protection system |
| CN111682515A (en) * | 2020-08-12 | 2020-09-18 | 国网江西省电力有限公司电力科学研究院 | Method for reducing operation risk of large grounding current in extra-high voltage direct current station |
-
2018
- 2018-03-27 CN CN201820418799.XU patent/CN208078639U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108233346A (en) * | 2018-03-27 | 2018-06-29 | 国网冀北电力有限公司检修分公司 | A kind of multiterminal of flexible direct current power grid coordinate control and protection system |
| CN108233346B (en) * | 2018-03-27 | 2020-01-03 | 国网冀北电力有限公司检修分公司 | Multi-terminal coordinated control protection system of flexible direct-current power grid |
| CN111682515A (en) * | 2020-08-12 | 2020-09-18 | 国网江西省电力有限公司电力科学研究院 | Method for reducing operation risk of large grounding current in extra-high voltage direct current station |
| CN111682515B (en) * | 2020-08-12 | 2021-01-05 | 国网江西省电力有限公司电力科学研究院 | Method for reducing operation risk of large grounding current in extra-high voltage direct current station |
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