CN105743218A - DC project electrically-triggered thyristor backup trigger system and monitoring method thereof - Google Patents
DC project electrically-triggered thyristor backup trigger system and monitoring method thereof Download PDFInfo
- Publication number
- CN105743218A CN105743218A CN201610042064.7A CN201610042064A CN105743218A CN 105743218 A CN105743218 A CN 105743218A CN 201610042064 A CN201610042064 A CN 201610042064A CN 105743218 A CN105743218 A CN 105743218A
- Authority
- CN
- China
- Prior art keywords
- standby
- trigger
- igct
- electricity
- triggers
- 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.)
- Granted
Links
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
- 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
- H02J13/00001—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 the display of information or by user interaction, e.g. supervisory control and data acquisition systems [SCADA] or graphical user interfaces [GUI]
-
- 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
- H02J13/00019—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 optical means
-
- 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
- H02J3/36—Arrangements for transfer of electric power between ac networks via a high-tension dc link
-
- 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
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Human Computer Interaction (AREA)
- Power Conversion In General (AREA)
Abstract
The invention discloses a DC project electrically-triggered thyristor backup trigger system comprising a TE board, a VBE device, and a monitoring system. A TE board backup trigger loop is arranged on the TE board. A backup trigger monitoring module is arranged inside the VBE device. One end of the TE board backup trigger loop is connected to the anode of an electrically-triggered thyristor, and the other end of the TE board backup trigger loop is connected with an amplifier circuit connected to the gate of the electrically-triggered thyristor and a light emitting circuit connected to the cathode of the electrically-triggered thyristor. A backup trigger action signal produced by the light emitting circuit is transmitted to the monitoring system through the backup trigger monitoring module. The invention further discloses a DC project electrically-triggered thyristor backup trigger signal monitoring method. The function of electrically-triggered thyristor backup trigger monitoring in the whole process from pressurization is achieved, analysis made by technical personnel is facilitated, and the working stability of converter stations is improved.
Description
Technical field
The present invention relates to technical field of direct current power transmission, be specifically related to a kind of DC engineering electricity and trigger the monitoring method of IGCT standby triggering system and backup trigger signal thereof.
Background technology
D.C. high voltage transmission is widely applied in China, and converter valve is the nucleus equipment of D.C. high voltage transmission, and direct current transportation is had vital effect by its reliable and stable operation.The core parts of converter valve are IGCTs, and usual single DC engineering comprises thousands of IGCTs.IGCT function is important, cost is high, thus to the monitoring of IGCT with protect extremely important.Press the triggering mode classification of IGCT at present, electricity can be divided into trigger IGCT and light triggered thyristor.
In direct current transportation running; the overvoltage protection of IGCT triggers to bear at IGCT and promptly triggers turn on thyristors under the unusual service condition of overvoltage; make IGCT damage from overvoltage, the safe and stable operation of whole current converter is had a very important role.IGCT is triggered for the electricity involved by this method, adopts standby trigger circuit to realize overvoltage protection and trigger.
At present, in domestic and international high voltage direct current transmission project electricity trigger IGCT standby trigger the key messages such as corresponding IGCT numbering, moment all without on deliver to monitoring system, be unfavorable for quickly investigating.Simultaneously, under current technology, the change of current has become charging, and after VBE (valvebaseelectronics valve-based electronics) device and TE plate (ThyristorElectronicBoard thyristor circuit plate) self-inspection complete, electricity can be carried out and trigger the monitoring of IGCT backup trigger signal, it is impossible to the standby realizing the overall process that electricity triggering IGCT self-pressurization starts triggers monitoring function.
Summary of the invention
For above-mentioned deficiency, an object of the present invention is to provide a kind of DC engineering electricity and triggers IGCT standby triggering system, it touches electricity triggering IGCT in order to solve standby, the key messages such as its IGCT numbering, moment not on deliver to the deficiency of monitoring system, and solve to realize electricity and trigger the problem that the standby of the overall process that IGCT self-pressurization starts triggers monitoring function.
For achieving the above object, the present invention adopts the technical scheme that:
A kind of DC engineering electricity triggers IGCT standby triggering system, and it includes TE plate, VBE device and monitoring system；Wherein, described TE plate is provided with TE plate standby trigger circuit, it is provided with standby in described VBE device and triggers monitoring modular, one end of described TE plate standby trigger circuit is connected to electricity and triggers the anode of IGCT, and the other end of described TE plate standby trigger circuit triggers the amplifying circuit of gate circuit transistor gate with being connected to electricity and is connected with being connected to the electric light emission loop triggering IGCT negative electrode；The standby trigger action signal that described light emission loop produces is delivered to the standby in VBE device by optical fiber and is triggered monitoring modular, and is delivered to monitoring system by standby triggering monitoring modular.
Described TE plate standby trigger circuit includes Breakover diode (BOD), protection diode and current-limiting resistor voltage divider; the anode of described Breakover diode triggers the anode of IGCT by being connected to electricity after protecting diode, current-limiting resistor voltage divider; the negative electrode of described Breakover diode is respectively connected with amplifying circuit and light emission loop; the positive pole of described protection diode is connected to current-limiting resistor voltage divider, and its negative pole is connected to the anode of Breakover diode.
Described light emission loop includes optical transmitting set and current-limiting resistor voltage divider, the positive pole of described optical transmitting set is connected to the negative electrode of Breakover diode by current-limiting resistor voltage divider, the negative pole of optical transmitting set is connected to electricity and triggers the negative electrode of IGCT, the standby trigger action signal that optical transmitting set produces is delivered to the standby in VBE device by optical fiber and is triggered monitoring modular, and is delivered to monitoring system by standby triggering monitoring modular.
Standby triggering monitoring modular is delivered to the standby trigger action signal of monitoring system and is included IGCT numbering, standby trigger instants, the action message that standby triggers.
Another object of the present invention is to provide a kind of DC engineering electricity to trigger IGCT backup trigger signal monitoring method, it touches electricity triggering IGCT in order to solve standby, the key messages such as its IGCT numbering, moment are all without the deficiency above delivering to monitoring system, and the problem solving to realize the standby triggering monitoring function that electricity triggers the overall process that IGCT self-pressurization starts.
For achieving the above object, the present invention adopts the technical scheme that:
A kind of method triggering the realization electricity triggering IGCT backup trigger signal monitoring of IGCT standby triggering system by DC engineering electricity, it comprises the following steps:
Step 1, monitored electricity by the trigger voltage loop of the standby trigger circuit of TE plate and trigger the voltage at IGCT two ends；
Step 2, when electricity triggers the standby trigger voltage definite value that the voltage at IGCT two ends triggers IGCT more than this electricity, standby trigger circuit turns on, then perform step 3, otherwise returns and continues executing with step 1；
Step 3, by amplifying circuit give electricity trigger gate circuit transistor gate provide one trigger pulse, trigger electricity trigger turn on thyristors, simultaneously by light emission loop standby trigger action signal be sent to VBE device standby triggering monitoring modular；
Step 4, standby trigger monitoring modular and show delivering to monitoring system on standby trigger action signal, and remind operations staff to note.
On deliver to the standby trigger action signal that monitoring system shows and include standby and touch electricity and trigger IGCT numbering, standby trigger instants, action message.
VBE device powers on and namely starts standby triggering monitoring modular function.
Compared with prior art, it has the beneficial effects that the present invention: present invention achieves standby and touches electricity and trigger IGCT, the key message such as its IGCT numbering, moment is delivered to the function of monitoring system；Achieve electricity and trigger the standby triggering monitoring function of the overall process that IGCT self-pressurization starts.Easily facilitate technical staff to be analyzed, improve the stability of current conversion station work.
Accompanying drawing explanation
Fig. 1 is the flow chart that DC engineering electricity of the present invention triggers IGCT standby triggering and monitoring method thereof.
Fig. 2 is the schematic diagram that DC engineering electricity of the present invention triggers IGCT standby triggering and monitoring method thereof.
Fig. 3 is that electricity triggers thyristor valve 1 standby triggering schematic diagram.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, present disclosure is described in further details.
Embodiment
Refer to shown in Fig. 2, a kind of DC engineering electricity triggers IGCT standby triggering system, and it includes TE plate, VBE device and monitoring system；Wherein, described TE plate is provided with TE plate standby trigger circuit, it is provided with standby in described VBE device and triggers monitoring modular, one end of described TE plate standby trigger circuit is connected to electricity and triggers the anode of IGCT, and the other end of described TE plate standby trigger circuit triggers the amplifying circuit of gate circuit transistor gate with being connected to electricity and is connected with being connected to the electric light emission loop triggering IGCT negative electrode；The standby trigger action signal that described light emission loop produces triggers monitoring modular by standby and is sent to monitoring system.Standby triggering monitoring modular is delivered to the standby trigger action signal of monitoring system and is included standby tactile electricity triggering IGCT numbering, standby trigger instants, action message.
Described TE plate standby trigger circuit includes Breakover diode (BOD), protection diode and current-limiting resistor voltage divider; the anode of described Breakover diode triggers the anode of IGCT by being connected to electricity after protecting diode, current-limiting resistor voltage divider; the negative electrode of described Breakover diode is respectively connected with amplifying circuit and light emission loop; the positive pole of described protection diode is connected to current-limiting resistor voltage divider, and its negative pole is connected to the anode of Breakover diode.Can adapt to Bu Tong electricity by the cooperation of the break over voltage parameter of Breakover diode with the resistance parameter of current-limiting resistor voltage divider and trigger the level of protection of IGCT.
Described light emission loop includes optical transmitting set and current-limiting resistor voltage divider, the positive pole of described optical transmitting set is connected to the negative electrode of Breakover diode by current-limiting resistor voltage divider, the negative pole of optical transmitting set is connected to electricity and triggers the negative electrode of IGCT, and the standby trigger action signal that optical transmitting set produces delivers to the standby triggering monitoring modular in rear VBE device by optical fiber.
Its principle is: when the voltage that Breakover diode bears is not up to its rated value (it is corresponding that this rated value triggers definite value with the standby of electricity triggering IGCT), Breakover diode is not turned on, amplifying circuit and light emission loop do not work, and when the voltage that Breakover diode bears is more than its rated value, then amplifying circuit triggers gate circuit transistor gate to electricity provides one to trigger pulse, trigger electricity and trigger turn on thyristors, standby standby trigger action signal (optical signal for optical transmitting set output) being sent to VBE device with light emission loop triggers monitoring modular, after standby triggers monitoring modular and is processed by this standby trigger action signal, it is uploaded to monitoring system to display.It is uploaded to the standby trigger action signal that monitoring system displays mainly to include standby and touch electricity and trigger the numbering (triggered monitoring modular by VBE device standby and connectivity port corresponding to different TE plate backup trigger signal realizes) of IGCT, standby trigger instants (VBE device standby triggers the clock of monitoring modular and realizes) and action message (being triggered monitoring modular by VBE device standby to receive standby and trigger the optical signal of optical transmitting set output and realize).
The method of its signal monitoring refer to shown in Fig. 1, and it comprises the following steps:
Step 1, VBE device power on and namely start standby triggering monitoring modular function；
Step 2, monitored electricity by the trigger voltage loop of the standby trigger circuit of TE plate and trigger the voltage at IGCT two ends；
Step 3, when electricity trigger IGCT two ends voltage more than this electricity trigger IGCT standby trigger voltage definite value time, standby trigger circuit turn on, then perform step 4, otherwise return continue executing with step 2；
Step 4, by amplifying circuit give electricity trigger gate circuit transistor gate provide one trigger pulse, trigger electricity trigger turn on thyristors, simultaneously by light emission loop standby trigger action signal be sent to VBE device standby triggering monitoring modular；Standby triggers monitoring modular and shows delivering to monitoring system on standby trigger action signal, and remind operations staff to note, above deliver to the standby trigger action signal that monitoring system shows and include the electricity that standby trigger action occurs and trigger IGCT numbering, standby trigger instants, action message.
In order to be more fully understood that the present invention, Fig. 3 illustrates that electricity triggers twice standby of thyristor valve 1 and triggers schematic diagram, refer to shown in Fig. 3, which show electricity and trigger the situation that twice standby of thyristor valve 1 triggers:
First time standby trigger condition: after converter power transformer service entrance switch closes, converter valve electricity triggers the IGCT upper voltage of just band, but VBE device and TE plate have had not enough time to self-inspection, according to the present invention, namely VBE device starts standby from powering on and triggers monitoring modular function, it is not necessary to wait VBE device and TE plate complete self-inspection can carry out IGCT backup trigger signal reception and on give.Before converter valve unlocks, electricity triggers thyristor voltage and is normally sinusoidal wave form, is added in electricity and triggers the voltage at IGCT two ends less than standby trigger voltage definite value；But there is electricity triggering IGCT in the converter valve pressurization moment and bear the probability of transient overvoltage, it is illustrated as the electricity triggering charged rear electric voltage exception of IGCT and is increased to standby triggering definite value, electricity triggers IGCT generation standby and triggers, and has the standby that backup trigger signal delivers to VBE device to trigger monitoring modular.
Second time standby trigger condition: after converter valve unlocks, electricity triggers IGCT and fails triggered as normal due to reasons such as triggered as normal passage break down, the voltage that two ends are born is more than standby trigger voltage definite value, then standby trigger circuit trigger port in support, trigger IGCT to electricity and send out triggering pulse, send a backup trigger signal to VBE simultaneously.
Although the present invention is illustrated by specific embodiment, it will be appreciated by those skilled in the art that, without departing from the present invention, it is also possible to the present invention is carried out various conversion and equivalent replacement.It addition, for particular condition or application, it is possible to the present invention is made various amendment, without deviating from the scope of the present invention.Therefore, the present invention is not limited to disclosed specific embodiment, and should include the whole embodiments falling within the scope of the claims in the present invention.
Claims (7)
1. a DC engineering electricity triggers IGCT standby triggering system, it is characterised in that it includes TE plate, VBE device and monitoring system；Wherein, described TE plate is provided with TE plate standby trigger circuit, it is provided with electricity in described VBE device and triggers IGCT standby triggering monitoring modular, one end of described TE plate standby trigger circuit is connected to electricity and triggers the anode of IGCT, and the other end of described TE plate standby trigger circuit triggers the amplifying circuit of gate circuit transistor gate with being connected to electricity and is connected with being connected to the electric light emission loop triggering IGCT negative electrode；The standby trigger action signal that described light emission loop produces is delivered to the standby in VBE device by optical fiber and is triggered monitoring modular, and is sent to monitoring system by standby triggering monitoring modular.
2. DC engineering electricity according to claim 1 triggers IGCT standby triggering system; it is characterized in that; described TE plate standby trigger circuit includes Breakover diode (BOD), protection diode and current-limiting resistor voltage divider; the anode of described Breakover diode triggers the anode of IGCT by being connected to electricity after protecting diode, current-limiting resistor voltage divider; the negative electrode of described Breakover diode is respectively connected with amplifying circuit and light emission loop; the positive pole of described protection diode is connected to current-limiting resistor voltage divider, and its negative pole is connected to the anode of Breakover diode.
3. DC engineering electricity according to claim 2 triggers IGCT standby triggering system, it is characterized in that, described light emission loop includes optical transmitting set and current-limiting resistor voltage divider, the positive pole of described optical transmitting set is connected to the negative electrode of Breakover diode by current-limiting resistor voltage divider, the negative pole of optical transmitting set is connected to electricity and triggers the negative electrode of IGCT, the standby trigger action signal that optical transmitting set produces is delivered to the standby in VBE device by optical fiber and is triggered monitoring modular, and is delivered to monitoring system by standby triggering monitoring modular.
4. DC engineering electricity according to claim 3 triggers IGCT standby triggering system, it is characterised in that standby triggering monitoring modular is delivered to the standby trigger action signal of monitoring system and included IGCT numbering, standby trigger instants, the action message that standby triggers.
5. the DC engineering electricity according to any one of claim 1-4 triggers the method that IGCT standby triggering system carries out electricity triggering IGCT backup trigger signal monitoring, it is characterised in that it comprises the following steps:
Step 1, monitored electricity by the trigger voltage loop of the standby trigger circuit of TE plate and trigger the voltage at IGCT two ends；
Step 2, when electricity triggers the standby trigger voltage definite value that the voltage at IGCT two ends triggers IGCT more than this electricity, standby trigger circuit turns on, then perform step 3, otherwise returns and continues executing with step 1；
Step 3, by amplifying circuit give electricity trigger gate circuit transistor gate provide one trigger pulse, trigger electricity trigger turn on thyristors, simultaneously by light emission loop standby trigger action signal be sent to VBE device standby triggering monitoring modular；
Step 4, standby trigger monitoring modular and show delivering to monitoring system on standby trigger action signal, and remind operations staff to note.
6. the method that electricity according to claim 5 triggers the monitoring of IGCT backup trigger signal, it is characterised in that above deliver to the standby trigger action signal that monitoring system show and include standby and touch electricity triggering IGCT numbering, standby trigger instants, action message.
7. the method that electricity according to claim 5 triggers the monitoring of IGCT backup trigger signal, it is characterised in that VBE device powers on and namely starts standby triggering monitoring modular function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610042064.7A CN105743218B (en) | 2016-01-21 | 2016-01-21 | A kind of DC engineering electricity triggering thyristor standby triggering system and its monitoring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610042064.7A CN105743218B (en) | 2016-01-21 | 2016-01-21 | A kind of DC engineering electricity triggering thyristor standby triggering system and its monitoring method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105743218A true CN105743218A (en) | 2016-07-06 |
| CN105743218B CN105743218B (en) | 2018-10-19 |
Family
ID=56247462
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610042064.7A Active CN105743218B (en) | 2016-01-21 | 2016-01-21 | A kind of DC engineering electricity triggering thyristor standby triggering system and its monitoring method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105743218B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107664718A (en) * | 2016-07-28 | 2018-02-06 | 全球能源互联网研究院 | A kind of HVDC IGCTs level direct current equalizing resistance dynamic parameter on-line monitoring method |
| CN109962611A (en) * | 2017-12-14 | 2019-07-02 | 中电普瑞科技有限公司 | A kind of high-lying electronic plate and its control method for high altitude localities |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0167734A1 (en) * | 1984-05-10 | 1986-01-15 | Siemens Aktiengesellschaft | Protection circuit for a thysistor |
| CN102035189A (en) * | 2010-10-12 | 2011-04-27 | 中国电力科学研究院 | Novel monitoring and protecting system for test thyristor of converter valve module |
| CN202034892U (en) * | 2010-11-09 | 2011-11-09 | 株洲变流技术国家工程研究中心有限公司 | Large power discharge switch device based on electronic triggered thyristor |
| CN103227506A (en) * | 2013-03-25 | 2013-07-31 | 国网智能电网研究院 | Triggering and monitoring unit of converter valve thyristor |
| CN203661020U (en) * | 2013-10-29 | 2014-06-18 | 国家电网公司 | Photoelectric heat tube valve group trigger board |
-
2016
- 2016-01-21 CN CN201610042064.7A patent/CN105743218B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0167734A1 (en) * | 1984-05-10 | 1986-01-15 | Siemens Aktiengesellschaft | Protection circuit for a thysistor |
| CN102035189A (en) * | 2010-10-12 | 2011-04-27 | 中国电力科学研究院 | Novel monitoring and protecting system for test thyristor of converter valve module |
| CN202034892U (en) * | 2010-11-09 | 2011-11-09 | 株洲变流技术国家工程研究中心有限公司 | Large power discharge switch device based on electronic triggered thyristor |
| CN103227506A (en) * | 2013-03-25 | 2013-07-31 | 国网智能电网研究院 | Triggering and monitoring unit of converter valve thyristor |
| CN203661020U (en) * | 2013-10-29 | 2014-06-18 | 国家电网公司 | Photoelectric heat tube valve group trigger board |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107664718A (en) * | 2016-07-28 | 2018-02-06 | 全球能源互联网研究院 | A kind of HVDC IGCTs level direct current equalizing resistance dynamic parameter on-line monitoring method |
| CN107664718B (en) * | 2016-07-28 | 2021-12-21 | 全球能源互联网研究院 | HVDC thyristor level DC voltage-sharing resistor dynamic parameter online monitoring method |
| CN109962611A (en) * | 2017-12-14 | 2019-07-02 | 中电普瑞科技有限公司 | A kind of high-lying electronic plate and its control method for high altitude localities |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105743218B (en) | 2018-10-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109474020B (en) | Intelligent shutdown system and method for photovoltaic module | |
| CN105071527A (en) | Small-power host modular fire-fighting emergency power supply | |
| CN105743218A (en) | DC project electrically-triggered thyristor backup trigger system and monitoring method thereof | |
| CN203951228U (en) | Transformer station direct current system battery pack supervising device | |
| CN202197098U (en) | Overvoltage protection circuit, light-emitting diode (LED) driving power supply and LED lighting device | |
| CN216720889U (en) | A photovoltaic system that is used for shutoff device of photovoltaic module and uses it | |
| CN204031561U (en) | The anti-rush of current circuit of LED lamp | |
| CN105021930A (en) | Converter valve reverse recovery phase protective characteristic test method and corresponding system | |
| CN105591461B (en) | Automatic storage battery switching system of communication unit on power transmission line tower | |
| CN204391018U (en) | A kind of overvoltage/undervoltage device being applicable to the instruction of miniature circuit breaker accessory tapes voltage | |
| CN203967819U (en) | A kind of accident lighting system | |
| CN203205650U (en) | Intelligent safety socket | |
| CN106711956A (en) | Over-voltage and under-voltage protective circuit | |
| CN203261097U (en) | Small-current power-taking and power-supply system of current transformer | |
| CN203398743U (en) | Safe starting circuit with self-locking function | |
| CN202268737U (en) | Explosion suppression and intrinsic safety dual-circuit power supply for mine | |
| CN201699599U (en) | Intrinsic-intrinsic-safety power supply with high output power | |
| CN203645393U (en) | Sustainable power supply without using storage battery | |
| CN202111488U (en) | Back-up power supply device for lithium battery set | |
| CN204967417U (en) | Incessant DC power supply system | |
| CN205195236U (en) | Auxiliary device who carries out residual current test during load of electric leakage circuit breaker | |
| CN104362659A (en) | Synchronous double-pole intertripping method of high-voltage direct-current power transmission system in in-station grounding mode | |
| CN205809156U (en) | A kind of power-off short message alarm system | |
| CN104393563A (en) | Mains supply monitoring system | |
| CN201374651Y (en) | Switch power supply with warning signal generator circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |