CN105846444A - Reactive power series compensation device topological wiring used for high-voltage and medium-voltage distribution network - Google Patents
Reactive power series compensation device topological wiring used for high-voltage and medium-voltage distribution network Download PDFInfo
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- CN105846444A CN105846444A CN201610292169.8A CN201610292169A CN105846444A CN 105846444 A CN105846444 A CN 105846444A CN 201610292169 A CN201610292169 A CN 201610292169A CN 105846444 A CN105846444 A CN 105846444A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1807—Arrangements for adjusting, eliminating or compensating reactive power in networks using series compensators
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- 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
- Y02E40/30—Reactive power compensation
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- Emergency Protection Circuit Devices (AREA)
Abstract
The invention provides reactive power series compensation device topological wiring used for a high-voltage and medium-voltage distribution network. The reactive power series compensation device topological wiring comprises a compensation capacitor Cap, a metal oxide voltage dependent resistor FR, a rapid discharge switch KF1 and a rapid bypass switch KF2. The compensation capacitor Cap is connected in series on a power supply line. The metal oxide voltage dependent resistor FR and the compensation capacitor Cap are connected in parallel. The rapid discharge switch KF1 and the rapid bypass switch KF2 are respectively connected in parallel with the compensation capacitor Cap. The beneficial effects are that operation overvoltage and discharge surge of the line can be solved from the perspective of the wiring and the principle, the problems of reducing the rated voltage of a series compensation capacitor and protecting safe operation of a capacitor bank can be effectively solved, real-time operation electrical parameters can be monitored and the wiring has the function of preventing failure of operation of the rapid switch so that construction cost of the series compensation device is enabled to be greatly reduced, the size is reduced, installation sites are flexible and equipment maintenance is simple.
Description
Technical field
The invention belongs to supply line's compensation device field, especially relate to a kind of idle string for high pressure power distribution network
Connection compensation device topology wiring.
Background technology
Along with expanding economy, the quick growth of power load, account for the vast outlying district electrical network of whole nation major part area
Extending to areas without electricity, the power quality issues of 110kV high-voltage ultralong circuit and middle voltage distribution networks becomes increasingly conspicuous, and embodies a concentrated expression of electricity
Press on the low side and voltage fluctuation rate big, cause the supply voltage of load side far beyond the quality standard of national regulation, have impact on
The production of each department people and life.110kV and following power distribution network remote power-feeding quality of voltage problem is solved for finding
Best method and approach, work about electric power person is carrying out exploration and practice always in decades, and reason is focused in many provinces and regions
In opinion in the circuit Series Compensation of unique advantage, and do unremitting effort for this, also achieve many achievements and experience.
But be limited to the series of problems such as input and output ratio, device inherently safe, poor reliability so that string benefit technology always could not in
High-voltage distribution network is widely applied.
In current, pressure series compensation device is the series compensation device based on high-speed switch and high-power thyristor, but during using
Clearly, some series compensation devices use spark gap to be connected in parallel on the two ends compensating electric capacity to shortcoming, fill as back-up protection
Put, the overcurrent in electric capacity can be bypassed when crossing stream, but spark gap does not possess arc extinguishing ability, when there is gap arcing
Between long problem；And existing series compensation device generally uses single high-speed switch, the most single high-speed switch to occur
Misaction, it is impossible to capacitor will be compensated in time out of service；It addition, existing series compensation device does not the most possess automatically-monitored energy
Power, it is impossible to monitor the voltage and current parameter of important node in real time, it is impossible to according to the electrical quantity gathered, sends control letter automatically
Number, control the operation of series compensation device.
Summary of the invention
In view of this, it is contemplated that propose a kind of idle series compensation device topology for high pressure power distribution network and connect
Line, the present invention solves the switching overvoltage of circuit from wiring and principle and shoves with electric discharge, efficiently solves reduction string and mends electricity
The safe operation problem of container rated voltage and protective condenser group, it is possible to monitor real-time operation electrical quantity, has and prevents soon
The function of speed switch failure so that series compensation device cost is greatly reduced, volume reduces, and infield is flexible, and plant maintenance is simple.
For reaching above-mentioned purpose, the technical scheme is that and be achieved in that:
A kind of idle series compensation device topology wiring for high pressure power distribution network, including:
Compensate capacitor Cap, described compensation capacitor Cap to be connected in supply line；
Metal-oxide varistor FR, described metal-oxide varistor FR and described compensation electric capacity
Device Cap is in parallel, and described metal-oxide varistor FR and described compensation capacitor Cap is constituted
Fault compression limiter；
Repid discharge switch KF1, switch KF1 is in parallel with described fault compression limiter in described repid discharge；
Quick side way switch KF2, described Quick side way switch KF2 is in parallel with described fault compression limiter；
Also include the first voltage transformer pt 1 for gathering described compensation capacitor Cap both end voltage, be used for gathering peace
Decorate line voltage and take the second voltage transformer pt 2 that can act on, for gathering the first of described compensation capacitor Cap electric current
Current Transmit 1, for gathering the second Current Transmit g of mount point line current, and is used for gathering described metal oxygen
3rd Current Transmit f of compound varistor FR electric current；Described first voltage transformer pt 1, described second mutual induction of voltage
Device PT2, described first Current Transmit 1, described second Current Transmit g and described 3rd Current Transmit f are respectively
Connected by wiring and have control protector KZ, described repid discharge switch KF1 and described Quick side way switch KF2 is controlled is connected to
Described control protector KZ.
Further, described compensation capacitor Cap is in series with current limiting element RF.
Further, the first isolation switch K1, the second isolation switch K2 and by-pass knife switch KP, described first isolation are also included
Disconnecting link K1 is serially connected in the end of incoming cables of described compensation capacitor Cap, and described second isolation switch K2 is serially connected in described compensation capacitor
The leading-out terminal of Cap, described by-pass knife switch KP is attempted by described first isolation switch K1 and described second isolation switch K2 place is returned
The two ends, outside on road, described by-pass knife switch KP connects supply line.
Further, described compensation capacitor Cap is single capacitor or the Capacitor banks of multiple capacitor parallel connection composition.
Further, described metal-oxide varistor FR is Zinc-oxide piezoresistor.
Relative to prior art, the idle series compensation device topology wiring for high pressure power distribution network of the present invention
Have the advantage that
Time properly functioning, the first isolation switch K1 and the second isolation switch K2 Guan Bi, by-pass knife switch KP opens, repid discharge
Switch KF1 and Quick side way switch KF2 opens, and compensates capacitor Cap and is connected in supply line, and the load current of circuit will be
Compensate capacitor Cap two ends and produce voltage drop, also can produce voltage drop on the inductance of circuit self, due to supply line simultaneously
Load current reduces to negative value, with the voltage drop side produced at line inductance two ends at the voltage compensating the generation of capacitor Cap two ends
To on the contrary, just can offset the voltage drop that load current produces on line inductance, such that it is able to improve the power supply to load
Quality of voltage, and the voltage pulsation that even elimination heavy duty start and stop cause can be greatly reduced, this is the principle of series compensation, also
It it is the intrinsic advantage place of the present invention.
First voltage transformer pt 1 of the present invention can gather compensation capacitor Cap both end voltage, the second voltage transformer
PT2 can gather and installs the voltage of dotted line and take energy, and the first Current Transmit 1 can gather the electricity compensating capacitor Cap
Stream, the second Current Transmit g can gather the line current of mount point, and the 3rd Current Transmit f can gather burning
The electric current of thing varistor FR, and can be transferred to control protector KZ by the electrical quantity of collection by wiring, control protection
Device KZ can compare the threshold value of parameters, selects the method for operation according to satisfied threshold condition, to repid discharge switch KF1 and
Quick side way switch KF2 sends control signal, it is achieved that automatically-monitored and control, and reaction is more accurate, promotes safe coefficient.
The fault compression limiter of the present invention is constituted by compensating capacitor Cap and metal-oxide varistor FR, normally transports
During row, compensate the voltage threshold voltage less than metal-oxide varistor FR of capacitor Cap, metal-oxide varistor
FR is inoperative；During short circuit, along with the increase of short-circuit impact electric current, the voltage at metal-oxide varistor FR two ends is because exceeding
Threshold voltage and turn on rapidly, by compensate capacitor Cap two ends voltage can be limited in relatively low level, prevent line short
Time, compensate capacitor Cap and damaged by the impact of super-high-current；It is connected in parallel on the repid discharge switch at fault compression limiter two ends
KF1 and Quick side way switch KF2, is controlled according to certain trigger condition by controlling protector KZ, it is possible to compensating capacitor Cap
Close time out of service, capacitor Cap and metal-oxide varistor FR short circuit will be compensated, compensate in capacitor Cap a large amount of
Electric charge through metal-oxide varistor FR, repid discharge switch KF1 and Quick side way switch KF2 discharge, will mend
Repay capacitor Cap out of service, it is to avoid human body is damaged；Use high-speed switch to replace traditional spark gap, not only disappear
Except spark gap does not has the problem of arc extinguishing ability, solving after puncturing because of spark gap, the gap arc time is long simultaneously
Problem；And repid discharge switch KF1 and Quick side way switch KF2 is double quick speed switch in parallel pattern, the most double of composition
Line structure, it is ensured that still have loop to be bled off by the electric charge compensating capacitor Cap when a tripping in two switches, it is to avoid to human body
Damaging, each high-speed switch has independent operation circuit, controls loop, is greatly improved the reliability of system, prevents from mending
Repaying capacitor Cap can not be out of service when line outage, and namely high-speed switch can not close and be exited by compensation capacitor Cap
Run, the electric charge at capacitor two ends is discharged, the electric equipment of power consumer will not be burnt out.
It is connected on the current limiting element RF compensated on capacitor Cap, it is possible to limit the discharge current compensating capacitor Cap, anti-
Only there is contact melting welding in repid discharge switch KF1 in making process, it is ensured that repid discharge switch KF1 closes a floodgate smoothly, and current limliting
Element RF is connected on compensation capacitor Cap front end, impulse overvoltage and system when line charging or big load can be avoided to start
Shove the impact to downstream load.
When the present invention needs repairing, repid discharge is switched KF1 and Quick side way switch KF2 Guan Bi, by capacitor Cap
Out of service, then Guan Bi by-pass knife switch KP, opens the first isolation switch K1 and the second isolation switch K2, series compensation device is exited
Run, working service can be carried out safely.
Accompanying drawing explanation
The accompanying drawing of the part constituting the present invention is used for providing a further understanding of the present invention, and the present invention's is schematic real
Execute example and illustrate for explaining the present invention, being not intended that inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the electrical block diagram of the embodiment of the present invention.
Detailed description of the invention
It should be noted that in the case of not conflicting, the embodiment in the present invention and the feature in embodiment can phases
Combination mutually.
In describing the invention, it is to be understood that term " " center ", " longitudinally ", " laterally ", " on ", D score,
Orientation or the position relationship of the instruction such as "front", "rear", "left", "right", " vertically ", " level ", " top ", " end ", " interior ", " outward " are
Based on orientation shown in the drawings or position relationship, it is for only for ease of the description present invention and simplifies description rather than instruction or dark
The device or the element that show indication must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that right
The restriction of the present invention.Additionally, term " first ", " second " etc. are only used for describing purpose, and it is not intended that indicate or hint phase
To importance or the implicit quantity indicating indicated technical characteristic.Thus, the feature defining " first ", " second " etc. can
To express or to implicitly include one or more this feature.In describing the invention, except as otherwise noted, " multiple "
It is meant that two or more.
In describing the invention, it should be noted that unless otherwise clearly defined and limited, term " is installed ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be fixing connection, it is also possible to be to removably connect, or be integrally connected；Can
To be mechanical connection, it is also possible to be electrical connection；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, Ke Yishi
The connection of two element internals.For the ordinary skill in the art, above-mentioned term can be understood by concrete condition
Concrete meaning in the present invention.
Describe the present invention below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
As it is shown in figure 1, the present invention provides a kind of idle series compensation device for high pressure power distribution network to open up
Flutter wiring, including:
Compensate capacitor Cap, described compensation capacitor Cap to be connected in supply line；
Metal-oxide varistor FR, described metal-oxide varistor FR and described compensation electric capacity
Device Cap is in parallel, and described metal-oxide varistor FR and described compensation capacitor Cap is constituted
Fault compression limiter；
Repid discharge switch KF1, switch KF1 is in parallel with described fault compression limiter in described repid discharge；
Quick side way switch KF2, described Quick side way switch KF2 is in parallel with described fault compression limiter；
Also include the first voltage transformer pt 1 for gathering described compensation capacitor Cap both end voltage, be used for gathering peace
Decorate line voltage and take the second voltage transformer pt 2 that can act on, for gathering the first of described compensation capacitor Cap electric current
Current Transmit 1, for gathering the second Current Transmit g of mount point line current, and is used for gathering described metal oxygen
3rd Current Transmit f of compound varistor FR electric current；Described first voltage transformer pt 1, described second mutual induction of voltage
Device PT2, described first Current Transmit 1, described second Current Transmit g and described 3rd Current Transmit f are respectively
Connected by wiring and have control protector KZ, described repid discharge switch KF1 and described Quick side way switch KF2 is controlled is connected to
Described control protector KZ.
Described compensation capacitor Cap is in series with current limiting element RF.
Also include the first isolation switch K1, the second isolation switch K2 and by-pass knife switch KP, described first isolation switch K1 string
Being connected on the end of incoming cables of described compensation capacitor Cap, described second isolation switch K2 is serially connected in the outlet of described compensation capacitor Cap
End, described by-pass knife switch KP is attempted by described first isolation switch K1 and the outside two in described second loop, isolation switch K2 place
End, described by-pass knife switch KP connects supply line.
Described compensation capacitor Cap is single capacitor or the Capacitor banks of multiple capacitor parallel connection composition, the most preferably
It is two capacitor parallel connections.
Described metal-oxide varistor FR is Zinc-oxide piezoresistor.
Constitute element function and the parameter of circuit structure of the present invention:
Compensate capacitor Cap: compensate capacitor Cap according to the requirement reasonable disposition of compensation depth, time properly functioning, compensate
Capacitances in series is in the line.The circuit distributed inductance of circuit, general indemnity electric capacity are depended in the capacitive reactance of configuration compensation capacitor Cap
Device Cap capacitive reactance is 0.8～1.5 times of distributed inductance induction reactance；Configuration compensates the rated current of capacitor Cap and depends on series compensation device
The payload at mount point rear portion.1.3 times of the specified of compensation capacitor Cap of adjusting according to the load maximum at mount point rear portion
Electric current, adjusts generally according to two capacitors tie, and the rated current of each capacitor is greater than Cap rated current
1/2；Configuration compensates the rated current that rated voltage is Cap of capacitor Cap and the product of Cap capacitive reactance.The power frequency tolerance of Cap
Voltage is 2.15 times of rated voltage, and the peak value withstanding voltage of Cap is power frequency withstanding voltageTimes.
Metal-oxide varistor FR: metal-oxide varistor FR selects Zinc-oxide piezoresistor, threshold herein
Voltage is adjusted according to 0.9 times that compensates capacitor Cap peak value withstanding voltage.Time properly functioning, the voltage compensating capacitor Cap is low
In the threshold voltage of Zinc-oxide piezoresistor, Zinc-oxide piezoresistor is inoperative；During short circuit, along with the increasing of short-circuit impact electric current
Greatly, the voltage at Zinc-oxide piezoresistor two ends turns on rapidly because exceeding threshold voltage, will compensate the voltage at capacitor Cap two ends
Being limited in relatively low level, protection compensates capacitor Cap and preserves from.Overvoltage setting parameter can hold for compensating capacitor Cap
Be hit 0.9 times of voltage magnitude；The gross energy setting parameter that metal-oxide varistor can absorb is novel high pressure
After series compensation device mount point that distribution is idle, three-phase shortcircuit 20ms produces 2.5～3.0 times of gross energy.
Current limiting element RF: be the discharge current limiting and compensating capacitor Cap.The impedance setting parameter of current limiting element RF
When being to compensate the operation of capacitor Cap peak load, compensation capacitor Cap exits and discharges, reaches putting of personal safety voltage
The electricity time was less than 30 minutes.
Repid discharge switch KF1: when compensating capacitor Cap and being out of service, repid discharge switch KF1 puts into, and will compensate
Capacitor Cap exits with metal-oxide varistor FR, and the control of repid discharge switch KF1 is by controlling protector KZ according to need
The condition that capacitor Cap to be compensated exits triggers.When rear end of the present invention is short-circuited, compensates capacitor Cap two ends and produce
Raw over-voltage and over-current, is triggered repid discharge switch KF1 Guan Bi by controlling protector KZ, compensation capacitor Cap is exited fortune
OK, being exited by metal-oxide varistor FR, in order to avoid throughput time is long and damage, composition compensates capacitor Cap and discharges back
Road, it is to avoid human body is damaged by capacitor voltage at both ends.
Quick side way switch KF2: when compensating capacitor Cap and being out of service, Quick side way switch KF2 puts into, and will compensate
Capacitor Cap exits with metal-oxide varistor FR, and Quick side way switch KF2 also switchs KF1 mono-with repid discharge simultaneously
Playing the shunt circuit of composition equity completely, repid discharge switch KF1 has completely self-contained control with Quick side way switch KF2 and returns
Road, with ensure when the two switch in a tripping time still have loop by compensate capacitor Cap electric charge bleed off, it is to avoid human body is made
Become injury.
First voltage transformer pt 1 gathers and compensates capacitor Cap both end voltage.
Second voltage transformer pt 2 gathers to be installed the voltage of dotted line and takes energy, is reduced to by high-pressure side 10kV primary voltage
The secondary voltage of two 100V/220V, one of which output is for protector measuring loop, and another group is output as device to be provided
Working power.
First Current Transmit 1 gathers the electric current compensating capacitor Cap.
Second Current Transmit g gathers the line current of mount point.
3rd Current Transmit f gathers the electric current of metal-oxide varistor FR.
The device of each acquisition parameter passes through wiring, is transferred to the electrical quantity of collection control protector KZ, controls protection
Device KZ compares the threshold value of parameters, selects the method for operation according to satisfied threshold condition, sends control letter according to the method for operation
Number, control repid discharge switch KF1, Quick side way switch KF2 and open or close, control protector KZ and include measuring function, control
Function processed, defencive function and communication function.
The specific works process of this example:
Time properly functioning, the first isolation switch K1 and the second isolation switch K2 Guan Bi, by-pass knife switch KP opens, repid discharge
Switch KF1 and Quick side way switch KF2 opens, and compensates capacitor Cap and is connected in supply line, and the load current of circuit will be
Compensate capacitor Cap two ends and produce voltage drop, also can produce voltage drop on the inductance of circuit self, due to supply line simultaneously
Load current reduces to negative value, with the voltage drop side produced at line inductance two ends at the voltage compensating the generation of capacitor Cap two ends
To on the contrary, just can offset the voltage drop that load current produces on line inductance, such that it is able to improve the power supply to load
Quality of voltage, and the voltage pulsation that even elimination heavy duty start and stop cause can be greatly reduced.
When line outage, the first isolation switch K1 and the second isolation switch K2 Guan Bi, by-pass knife switch KP opens, the first electricity
Current transformer CT1 and the second Current Transmit g does not measures load current, controls protector KZ and controls repid discharge switch KF1
Close with Quick side way switch KF2, capacitor Cap short circuit will be compensated, compensate substantial amounts of electric charge in capacitor Cap first through current limliting
Part RF, repid discharge switch KF1 and Quick side way switch KF2 discharge, and will compensate capacitor Cap out of service；
After line outage, when recovering power transmission, control protector KZ and control repid discharge switch KF1 and Quick side way switch
KF2,2 minutes automatic brake separatings of time delay, compensation capacitor Cap series connection is realized series compensation in the line.
Once line current exceedes the 130% of maximum operating currenbt, shows that at circuit string benefit, near region or far-end free short circuit
Fault, controls protector KZ and controls repid discharge switch KF1 and Quick side way switch KF2, and about the 12ms after short circuit closes a floodgate,
Compensate capacitor Cap to discharge, then by whole device through current limiting element RF, repid discharge switch KF1 and Quick side way switch KF2
Exit.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention
Within god and principle, any modification, equivalent substitution and improvement etc. made, should be included within the scope of the present invention.
Claims (5)
1. the idle series compensation device topology wiring for high pressure power distribution network, it is characterised in that:
Including:
Compensate capacitor Cap, described compensation capacitor Cap to be connected in supply line；
Metal-oxide varistor FR, described metal-oxide varistor FR are in parallel with described compensation capacitor Cap, described
Metal-oxide varistor FR and described compensation capacitor Cap constitutes fault compression limiter；
Repid discharge switch KF1, switch KF1 is in parallel with described fault compression limiter in described repid discharge；
Quick side way switch KF2, described Quick side way switch KF2 is in parallel with described fault compression limiter；
Also include the first voltage transformer pt 1 for gathering described compensation capacitor Cap both end voltage, be used for gathering mount point
Line voltage and take the second voltage transformer pt 2 that can act on, for gathering the first electric current of described compensation capacitor Cap electric current
Transformer CT1, for gathering the second Current Transmit g of mount point line current, and is used for gathering described metal-oxide
3rd Current Transmit f of varistor FR electric current；Described first voltage transformer pt 1, described second voltage transformer
PT2, described first Current Transmit 1, described second Current Transmit g and described 3rd Current Transmit f lead to respectively
Cross wiring to connect and have control protector KZ, described repid discharge switch KF1 and described Quick side way switch KF2 is controlled is connected to institute
State control protector KZ.
Idle series compensation device topology wiring for high pressure power distribution network the most according to claim 1, its feature exists
In: described compensation capacitor Cap is in series with current limiting element RF.
3. according to the idle series compensation device topology wiring for high pressure power distribution network described in any one of claim 1 or 2,
It is characterized in that: also include the first isolation switch K1, the second isolation switch K2 and by-pass knife switch KP, described first isolation switch K1
Being serially connected in the end of incoming cables of described compensation capacitor Cap, described second isolation switch K2 is serially connected in going out of described compensation capacitor Cap
Line end, described by-pass knife switch KP is attempted by described first isolation switch K1 and the outside in described second loop, isolation switch K2 place
Two ends, described by-pass knife switch KP connects supply line.
Idle series compensation device topology wiring for high pressure power distribution network the most according to claim 1, its feature exists
In: described compensation capacitor Cap is single capacitor or the Capacitor banks of multiple capacitor parallel connection composition.
Idle series compensation device topology wiring for high pressure power distribution network the most according to claim 1, its feature exists
In: described metal-oxide varistor FR is Zinc-oxide piezoresistor.
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| CN201610292169.8A CN105846444A (en) | 2016-05-05 | 2016-05-05 | Reactive power series compensation device topological wiring used for high-voltage and medium-voltage distribution network |
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| CN201610292169.8A CN105846444A (en) | 2016-05-05 | 2016-05-05 | Reactive power series compensation device topological wiring used for high-voltage and medium-voltage distribution network |
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Cited By (5)
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| CN109038612A (en) * | 2018-09-27 | 2018-12-18 | 国网河南省电力公司邓州市供电公司 | A kind of more capacitance capacitor series compensation devices of high-speed switch type |
| CN109066720A (en) * | 2018-09-27 | 2018-12-21 | 国网河南省电力公司邓州市供电公司 | A kind of transmission line of electricity capacitor string benefit cabinet |
| CN110021927A (en) * | 2018-01-09 | 2019-07-16 | 江苏南瑞泰事达电气有限公司 | A kind of the control guard method and system of power distribution network serial connection capacitor compensating device |
| CN110808606A (en) * | 2019-12-09 | 2020-02-18 | 南方电网科学研究院有限责任公司 | Power module overvoltage prevention circuit of flexible direct current transmission and converter valve |
| CN117498284A (en) * | 2023-10-26 | 2024-02-02 | 武汉大学 | Series compensation capacitor device based on short-circuit fault current intelligent self-driving |
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Application publication date: 20160810 |