CN107947140A - A kind of control method and device of half-wave power transmission line power fluctuation overvoltage - Google Patents

A kind of control method and device of half-wave power transmission line power fluctuation overvoltage Download PDF

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Publication number
CN107947140A
CN107947140A CN201711043825.1A CN201711043825A CN107947140A CN 107947140 A CN107947140 A CN 107947140A CN 201711043825 A CN201711043825 A CN 201711043825A CN 107947140 A CN107947140 A CN 107947140A
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China
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overvoltage
arrester
power transmission
wave power
swing
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CN201711043825.1A
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CN107947140B (en
Inventor
张媛媛
王毅
李连海
班连庚
项祖涛
韩彬
宋瑞华
郑彬
杨大业
宋修友
崔林
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State Grid Corp of China SGCC
Beijing Jiaotong University
China Electric Power Research Institute Co Ltd CEPRI
Electric Power Research Institute of State Grid Jiangsu Electric Power Co Ltd
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State Grid Corp of China SGCC
Beijing Jiaotong University
China Electric Power Research Institute Co Ltd CEPRI
Electric Power Research Institute of State Grid Jiangsu Electric Power Co Ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
    • H02H9/042—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage comprising means to limit the absorbed power or indicate damaged over-voltage protection device
    • 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
    • H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
    • 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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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

The present invention provides a kind of control method and device of half-wave power transmission line power fluctuation overvoltage, the differentiation configuration strategy of arrester along half-wave power transmission circuit is obtained by the absorption maximum energy of the lower arrester of power swing overvoltage effect in uniform configuration strategy, also judge the power swing overvoltage of half-wave power transmission circuit in differentiation configuration strategy, whether the absorption maximum energy of the duration of power swing overvoltage and the lower arrester of power swing overvoltage effect meets power fluctuation limit requirement at the same time, differentiation configuration strategy is optimized if meeting at the same time, otherwise differentiation configuration strategy is modified.The present invention defines half-wave power transmission line power fluctuation overvoltage and its characteristic first, and the research to half-wavelength transmission line of electricity provides basis；The present invention can effectively solve half-wave power transmission system power fluctuation overvoltage problem, while the suppression for half-wave power transmission line power fluctuation overvoltage provides foundation and basis.

Description

A kind of control method and device of half-wave power transmission line power fluctuation overvoltage
Technical field
The present invention relates to technical field of power systems, and in particular to a kind of half-wave power transmission line power fluctuation overvoltage Control method and device.
Background technology
Half-wave power transmission technology (half wave-length AC transmission, HWACT) refers to the electric of transmission of electricity Distance is close to a power frequency half-wavelength, i.e., the three-phase alternating current transmission of electricity of about 3000km (50Hz) or about 2600km (60Hz) overlength distance Technology, self-balancing that all fronts are idle, without installation reactive-load compensation equipment, without setting intermediate switching station.Its ability to transmit electricity is strong, economical Property and reliability preferably, can realize remote synchronous network.With the propulsion of global energy internet, half-wave transmission of electricity is used as one Kind is got the attention suitable for the intercontinental transportation scheme of extensive electric power.
But the engineer application of half-wave power transmission, which it is also highly desirable to have, solves some such as security and stability control, overvoltage and secondary arc currents The suppression of the technical problem of suppression, relay protection scheme etc., wherein overvoltage is to restrict the key issue of half-wave power transmission application One of.Due to the special line construction of half-wave power transmission circuit, there is very big difference in the characteristics of making its overvoltage with conventional electrical power lines road It is different.Under the fault conditions such as single-phase earthing, two relative ground circuits, three-phase ground short circuit and phase fault, half-wave power transmission circuit Half-wavelength characteristic destroyed, under the action of capacitive rise effect and parametric resonance, failure phase and neighbouring sound mutually excitation it is temporary State overvoltage problem is extremely prominent, and catastrophe failure point is the emphasis that half-wave power transmission line over-voltage suppresses up to several times.
Half-wave power transmission circuit occur overvoltage half-wave power transmission system can be caused to be unable to safe operation, at present by The overvoltage that half-wavelength transmission line of electricity occurs in arrester is installed on half-wave power transmission circuit additional to suppress, but due to half-wavelength The special relationship along line voltage and its own transimission power of transmission line of electricity, also there are another overvoltage phenomenon, by Half-wave power transmission circuit cannot be solved and this kind of overvoltage problem occur by installing arrester on half-wave power transmission circuit additional, this kind of excessively electric Pressure can cause half-wave power transmission system to be unable to safe operation.
The content of the invention
In order to overcome the above-mentioned circuit of half-wave power transmission in the prior art because the overvoltage that failure occurs causes half-wave power transmission System is unable to the deficiency of safe operation, the present invention provide a kind of half-wave power transmission line power fluctuation overvoltage control method and Device, first determines that power swing is excessively electric in the uniform configuration strategy of arrester and uniform configuration strategy along half-wave power transmission circuit The absorption maximum energy of the lower arrester of pressure effect, then according to the lower arrester of power swing overvoltage effect in uniform configuration strategy Absorption maximum energy determine the differentiation configuration strategy of arrester along half-wave power transmission circuit, and determine differentiation configuration plan The power swing overvoltage of slightly middle half-wave power transmission circuit, the duration of power swing overvoltage and power swing overvoltage are made With the absorption maximum energy of lower arrester, then judge that the power swing of half-wave power transmission circuit in differentiation configuration strategy is excessively electric At the same time whether the absorption maximum energy of pressure, the duration of power swing overvoltage and the lower arrester of power swing overvoltage effect Meet power fluctuation limit requirement, differentiation configuration strategy is optimized if meeting at the same time, plan otherwise is configured to differentiation Slightly it is modified, obtains final differentiation configuration strategy.
In order to realize foregoing invention purpose, the present invention adopts the following technical scheme that：
The present invention provides a kind of control method of half-wave power transmission line power fluctuation overvoltage, including：
Determine along half-wave power transmission circuit power swing mistake in the uniform configuration strategy of arrester and uniform configuration strategy The absorption maximum energy of the lower arrester of voltage effect；
Half-wavelength is determined according to the absorption maximum energy of the lower arrester of power swing overvoltage effect in uniform configuration strategy The differentiation configuration strategy of arrester along transmission line of electricity, and determine the power of half-wave power transmission circuit in differentiation configuration strategy Fluctuate the absorption maximum energy of overvoltage, the duration of power swing overvoltage and the lower arrester of power swing overvoltage effect Amount；
Judge that the power swing overvoltage of half-wave power transmission circuit in differentiation configuration strategy, power swing overvoltage are held Whether the absorption maximum energy of continuous time and the lower arrester of power swing overvoltage effect meets power fluctuation limit requirement at the same time, Differentiation configuration strategy is optimized if meeting at the same time, otherwise differentiation configuration strategy is modified.
The power swing overvoltage of the half-wave power transmission circuit is included in the case of breaking down on half-wave power transmission circuit When the power swing of generation exceedes natural power, the overvoltage that occurs on half-wave power transmission circuit；
The amplitude of the power swing overvoltage is proportional to the ratio of power swing and half-wave power transmission circuit natural power；
The duration of the power swing overvoltage and the power swing time consistency of half-wave power transmission circuit；
If failure is single-phase transient earthing failure, the failure process of the single-phase transient earthing failure includes mistake during failure Journey, reclosing process and rocking process.
The uniform configuration strategy of arrester is determined according to procedure below along the half-wave power transmission circuit：
Half-wave power transmission circuit is evenly dividing for multiple line units, and at the end of each line unit with regular length The arrester of point identical group of number of installing.
The absorption maximum energy of the lower arrester of power swing overvoltage effect is according to following mistake in the uniformly configuration strategy Journey determines：
Under the conditions of half-wave power transmission circuit total transfer capability, pass through the electromagnetic transient simulation mould of half-wave power transmission system Type determines the absorption maximum energy of the lower arrester of power swing overvoltage effect in uniform configuration strategy.
The absorption maximum energy of the lower arrester of power swing overvoltage effect determines half in the uniform configuration strategy of basis The differentiation configuration strategy of arrester includes along wavelength transmission line of electricity：
The 80% of arrester absorption energy capability is no more than with the absorption maximum energy of single group arrester, is each taken shelter from the thunder It is principle that device installation site, which at most installs two groups of arresters and preferentially installs arrester in circuit cell end, in each circuit The terminal point of unit and internal zinc oxide surge arresters.
The terminal point of the line unit and internal zinc oxide surge arresters include：
Determine the terminal point of line unit and the installation number of internal lightning arrester, including：
If the terminal point of line unit and internal installation m group arresters altogether, power swing is excessively electric in uniform configuration strategy The absorption maximum energy of the lower arrester of pressure effect is EU, work as EU＜ 0.8EMWhen, m=1；Work as EU≥0.8EMWhen, m=[EU/ 0.8EM], [] represents round, wherein, EMEnergy capability is absorbed for arrester；
Determine the terminal point of line unit and the installation site of internal lightning arrester, including：
During m=1, one group of arrester is installed in circuit cell end endpoint；
During m=2, two groups of arresters are installed in circuit cell end endpoint；
During m >=3, line unit terminal point installs two groups of arresters, and remaining Allocation of Lightning Arrester exists in the following way Inside line unit：
Remaining Allocation of Lightning Arrester be d, 2d with line unit terminal point distance ..., at the position of kd, wherein, k is Natural number, d represents the span of half-wave power transmission circuit, when m is even number,When m is odd number,
Power swing overvoltage, the power swing overvoltage of half-wave power transmission circuit in the definite differentiation configuration strategy Duration and the absorption maximum energy of the lower arrester of power swing overvoltage effect include：
Under the conditions of half-wave power transmission circuit total transfer capability, pass through the electromagnetic transient simulation mould of half-wave power transmission system Type determines the power swing overvoltage of half-wave power transmission circuit in differentiation configuration strategy, the duration of power swing overvoltage The absorption maximum energy of lower arrester is acted on power swing overvoltage.
The power fluctuation limit requires to include：
1) the not super 1.4p.u. of the power swing overvoltage of substation line side, and the power swing mistake of substation line side The duration of voltage is not more than 0.5s；
2) the power swing Overvoltage Amplitude of half-wave power transmission circuit and the power swing of half-wave power transmission circuit are excessively electric The duration of pressure is satisfied by arrester temporary overvoltage tolerance performance；
3) absorption maximum energy of the arrester under the effect of power swing overvoltage meets to keep away along half-wave power transmission circuit Thunder device absorbs energy capability.
It is described differentiation configuration strategy is optimized including：
If arrester installation site is L on half-wave power transmission circuit1,…,Lh,…,LH, single group arrester absorption maximum energy Measure as Eh, h=1,2 ..., H, H represent half-wave power transmission circuit on arrester installation site sum；
If Eh＜ 0.5EMAnd line unit terminal point and internal shared at least two groups of arresters, according to first from line unit The principle for reducing by one group of arrester every time to line unit end is held to update differentiation configuration strategy, and according to half-wave power transmission system The electromagnetic transient simulation model of system determines that the power swing of half-wave power transmission circuit in the differentiation configuration strategy after renewal is excessively electric The absorption maximum energy of pressure, the duration of power swing overvoltage and the lower arrester of power swing overvoltage effect, and judge The power swing overvoltage of half-wave power transmission circuit in differentiation configuration strategy after renewal, power swing overvoltage it is lasting when Between and the absorption maximum energy of the lower arrester of power swing overvoltage effect whether meet power fluctuation limit requirement at the same time, if It is, using the differentiation configuration strategy after renewal as final Allocation of Lightning Arrester strategy, otherwise to configure the differentiation before renewal Strategy is as final Allocation of Lightning Arrester strategy；
If 0.5EM≤Eh≤EMAnd in differentiation configuration strategy half-wave power transmission circuit power swing overvoltage, power waves The absorption maximum energy of the duration of dynamic overvoltage and the lower arrester of power swing overvoltage effect meets power swing at the same time Limitation requires, then using differentiation configuration strategy as final Allocation of Lightning Arrester strategy.
It is described differentiation configuration strategy is modified including：
If the terminal point of line unit and the installation site of internal lightning arrester are L1,…,Li,…,LN, i=1,2 ..., N, N represent arrester installation site sum, L in line unitiRepresent i-th of installation site；
If LiClose to L1, then in L1And close to line unit head end and and L1Distance is according to each increase at the position of d The principle of one group of arrester corrects differentiation configuration strategy, up to the power waves of half-wave power transmission circuit in differentiation configuration strategy The absorption maximum energy of dynamic overvoltage, the duration of power swing overvoltage and the lower arrester of power swing overvoltage effect is same When meet power fluctuation limit requirement, and using revised differentiation configuration strategy as final Allocation of Lightning Arrester strategy；
If LiClose to LN, then close to half-wave power transmission line end and and LNDistance is according to each increase at the position of d The principle of one group of arrester corrects differentiation configuration strategy, up to the power waves of half-wave power transmission circuit in differentiation configuration strategy The absorption maximum energy of dynamic overvoltage, the duration of power swing overvoltage and the lower arrester of power swing overvoltage effect is same When meet power fluctuation limit requirement, and using revised differentiation configuration strategy as final Allocation of Lightning Arrester strategy.
The present invention also provides a kind of control device of half-wave power transmission line power fluctuation overvoltage, including：
First determining module, for determining the uniform configuration strategy of arrester and uniformly configuration along half-wave power transmission circuit The absorption maximum energy of the lower arrester of power swing overvoltage effect in strategy；
Second determining module, for being inhaled according to lower the maximum of arrester of power swing overvoltage effect in uniform configuration strategy The differentiation configuration strategy that energy determines arrester along half-wave power transmission circuit is received, and determines half-wave in differentiation configuration strategy The power swing overvoltage of long power transmission line, the duration of power swing overvoltage and the effect of power swing overvoltage are lower lightning-arrest The absorption maximum energy of device；
Judgment module, for judging power swing overvoltage, the power of half-wave power transmission circuit in differentiation configuration strategy Fluctuate the duration of overvoltage and whether the absorption maximum energy of the lower arrester of power swing overvoltage effect meets work(at the same time Rate fluctuation limitation requires, and differentiation configuration strategy is optimized if meeting at the same time, otherwise differentiation configuration strategy is carried out Correct.
The power swing overvoltage of the half-wave power transmission circuit is included in the case of breaking down on half-wave power transmission circuit When the power swing of generation exceedes natural power, the overvoltage that occurs on half-wave power transmission circuit；
The amplitude of the power swing overvoltage is proportional to the ratio of power swing and half-wave power transmission circuit natural power；
The duration of the power swing overvoltage and the power swing time consistency of half-wave power transmission circuit；
If failure is single-phase transient earthing failure, the failure process of the single-phase transient earthing failure includes mistake during failure Journey, reclosing process and rocking process.
First determining module is specifically used for：
Half-wave power transmission circuit is evenly dividing for multiple line units, and at the end of each line unit with regular length The arrester of point identical group of number of installing.
First determining module is specifically used for：
Under the conditions of half-wave power transmission circuit total transfer capability, pass through the electromagnetic transient simulation mould of half-wave power transmission system Type determines the absorption maximum energy of the lower arrester of power swing overvoltage effect in uniform configuration strategy.
Second determining module is specifically used for：
The 80% of arrester absorption energy capability is no more than with the absorption maximum energy of single group arrester, is each taken shelter from the thunder It is principle that device installation site, which at most installs two groups of arresters and preferentially installs arrester in circuit cell end, in each circuit The terminal point of unit and internal zinc oxide surge arresters.
Second determining module is specifically used for：
Determine the terminal point of line unit and the installation number of internal lightning arrester, including：
If the terminal point of line unit and internal installation m group arresters altogether, power swing is excessively electric in uniform configuration strategy The absorption maximum energy of the lower arrester of pressure effect is EU, work as EU＜ 0.8EMWhen, m=1；Work as EU≥0.8EMWhen, m=[EU/ 0.8EM], [] represents round, wherein, EMEnergy capability is absorbed for arrester；
Determine the terminal point of line unit and the installation site of internal lightning arrester, including：
During m=1, one group of arrester is installed in circuit cell end endpoint；
During m=2, two groups of arresters are installed in circuit cell end endpoint；
During m >=3, line unit terminal point installs two groups of arresters, and remaining Allocation of Lightning Arrester exists in the following way Inside line unit：
Remaining Allocation of Lightning Arrester be d, 2d with line unit terminal point distance ..., at the position of kd, wherein, k is Natural number, d represents the span of half-wave power transmission circuit, when m is even number,When m is odd number,
Second determining module is specifically used for：
Under the conditions of half-wave power transmission circuit total transfer capability, pass through the electromagnetic transient simulation mould of half-wave power transmission system Type determines the power swing overvoltage of half-wave power transmission circuit in differentiation configuration strategy, the duration of power swing overvoltage The absorption maximum energy of lower arrester is acted on power swing overvoltage.
The judgment module is specifically used for determining following power fluctuation limit requirement：
1) the not super 1.4p.u. of the power swing overvoltage of substation line side, and the power swing mistake of substation line side The duration of voltage is not more than 0.5s；
2) the power swing Overvoltage Amplitude of half-wave power transmission circuit and the power swing of half-wave power transmission circuit are excessively electric The duration of pressure is satisfied by arrester temporary overvoltage tolerance performance；
3) absorption maximum energy of the arrester under the effect of power swing overvoltage meets to keep away along half-wave power transmission circuit Thunder device absorbs energy capability.
The judgment module specifically optimizes differentiation configuration strategy according to procedure below：
If arrester installation site is L on half-wave power transmission circuit1,…,Lh,…,LH, single group arrester absorption maximum energy Measure as Eh, h=1,2 ..., H, H represent half-wave power transmission circuit on arrester installation site sum；
If Eh＜ 0.5EMAnd line unit terminal point and internal shared at least two groups of arresters, according to first from line unit The principle for reducing by one group of arrester every time to line unit end is held to update differentiation configuration strategy, and according to half-wave power transmission system The electromagnetic transient simulation model of system determines that the power swing of half-wave power transmission circuit in the differentiation configuration strategy after renewal is excessively electric The absorption maximum energy of pressure, the duration of power swing overvoltage and the lower arrester of power swing overvoltage effect, and judge The power swing overvoltage of half-wave power transmission circuit in differentiation configuration strategy after renewal, power swing overvoltage it is lasting when Between and the absorption maximum energy of the lower arrester of power swing overvoltage effect whether meet power fluctuation limit requirement at the same time, if It is, using the differentiation configuration strategy after renewal as final Allocation of Lightning Arrester strategy, otherwise to configure the differentiation before renewal Strategy is as final Allocation of Lightning Arrester strategy；
If 0.5EM≤Eh≤EMAnd in differentiation configuration strategy half-wave power transmission circuit power swing overvoltage, power waves The absorption maximum energy of the duration of dynamic overvoltage and the lower arrester of power swing overvoltage effect meets power swing at the same time Limitation requires, then using differentiation configuration strategy as final Allocation of Lightning Arrester strategy.
The judgment module is specifically modified differentiation configuration strategy according to procedure below：
If the terminal point of line unit and the installation site of internal lightning arrester are L1,…,Li,…,LN, i=1,2 ..., N, N represent arrester installation site sum, L in line unitiRepresent i-th of installation site；
If LiClose to L1, then in L1And close to line unit head end and and L1Distance is according to each increase at the position of d The principle of one group of arrester corrects differentiation configuration strategy, up to the power waves of half-wave power transmission circuit in differentiation configuration strategy The absorption maximum energy of dynamic overvoltage, the duration of power swing overvoltage and the lower arrester of power swing overvoltage effect is same When meet power fluctuation limit requirement, and using revised differentiation configuration strategy as final Allocation of Lightning Arrester strategy；
If LiClose to LN, then close to half-wave power transmission line end and and LNDistance is according to each increase at the position of d The principle of one group of arrester corrects differentiation configuration strategy, up to the power waves of half-wave power transmission circuit in differentiation configuration strategy The absorption maximum energy of dynamic overvoltage, the duration of power swing overvoltage and the lower arrester of power swing overvoltage effect is same When meet power fluctuation limit requirement, and using revised differentiation configuration strategy as final Allocation of Lightning Arrester strategy.
Compared with the immediate prior art, technical solution provided by the invention has the advantages that：
In the control method of half-wave power transmission line power fluctuation overvoltage provided by the invention, half-wave power transmission is first determined Along circuit in the uniform configuration strategy of arrester and uniform configuration strategy the lower arrester of power swing overvoltage effect maximum Energy is absorbed, then determines half according to the absorption maximum energy of the lower arrester of power swing overvoltage effect in uniform configuration strategy The differentiation configuration strategy of arrester along wavelength transmission line of electricity, and determine half-wave power transmission circuit in differentiation configuration strategy The absorption maximum of power swing overvoltage, the duration of power swing overvoltage and the lower arrester of power swing overvoltage effect Energy, then judges the power swing overvoltage of half-wave power transmission circuit in differentiation configuration strategy, power swing overvoltage Whether the absorption maximum energy of duration and the lower arrester of power swing overvoltage effect meets that power fluctuation limit will at the same time Ask, differentiation configuration strategy is optimized if meeting at the same time, otherwise differentiation configuration strategy is modified, obtain final Differentiation configuration strategy, realize the control to half-wavelength transmission line of electricity power swing overvoltage；
The control device of half-wave power transmission line power fluctuation overvoltage provided by the invention includes being used to determine half-wavelength The lower arrester of power swing overvoltage effect in the uniform configuration strategy of arrester and uniform configuration strategy along transmission line of electricity First determining module of absorption maximum energy, for according to the lower arrester of power swing overvoltage effect in uniform configuration strategy Absorption maximum energy determines the differentiation configuration strategy of arrester along half-wave power transmission circuit, and determines differentiation configuration strategy The power swing overvoltage of middle half-wave power transmission circuit, the duration of power swing overvoltage and the effect of power swing overvoltage Second determining module of the absorption maximum energy of lower arrester and for judging half-wave power transmission line in differentiation configuration strategy The maximum of the power swing overvoltage on road, the duration of power swing overvoltage and the lower arrester of power swing overvoltage effect Absorb whether energy meets power fluctuation limit requirement at the same time, differentiation configuration strategy is optimized if meeting at the same time, it is no The judgment module being then modified to differentiation configuration strategy, finally obtains final differentiation configuration strategy, realizes to half-wave The control of long power transmission line power swing overvoltage；
It is defeated that the control method of half-wave power transmission line power fluctuation overvoltage provided by the invention defines half-wavelength first Electric line power swing overvoltage, and it is determined that amplitude of the power swing overvoltage including power swing overvoltage is about power waves The dynamic duration and half-wave power transmission circuit with the ratio of half-wave power transmission circuit natural power and power swing overvoltage Power swing time consistency of both characteristic, research to half-wavelength transmission line of electricity provides basis；
Power fluctuation limit in the control method of half-wave power transmission line power fluctuation overvoltage provided by the invention will Ask the not super 1.4p.u. of power swing overvoltage including substation line side and the power swing overvoltage of substation line side Duration is not more than the power of 0.5s, the power swing Overvoltage Amplitude of half-wave power transmission circuit and half-wave power transmission circuit The duration of fluctuation overvoltage is satisfied by lightning-arrest along arrester temporary overvoltage tolerance performance and half-wave power transmission circuit Absorption maximum energy of the device under the effect of power swing overvoltage meets that arrester absorbs energy capability totally three aspects, is The control of power swing overvoltage provides basis for estimation；
It is defeated that the control method of half-wave power transmission line power fluctuation overvoltage provided by the invention can effectively solve half-wavelength Electric system power swing overvoltage problem, and can ensure half-wave power transmission system safety operation, while be half-wave power transmission line The suppression of road power swing overvoltage provides foundation and basis；
The control method of half-wave power transmission line power fluctuation overvoltage provided by the invention solves half-wave power transmission skill New overvoltage (i.e. the power swing overvoltage of half-wave power transmission circuit) technical barrier that art faces, to half-wavelength ac transmission The implementation of engineering test engineering provides strong technical support.
Brief description of the drawings
Fig. 1 is the control method flow chart of half-wave power transmission line power fluctuation overvoltage in the embodiment of the present invention 1；
Fig. 2 is that single-phase earthing transient fault sequential and process signal occur for half-wave power transmission circuit in the embodiment of the present invention 1 Figure；
Fig. 3 is half-wave power transmission system wiring schematic diagram in the embodiment of the present invention 2；
Fig. 4 is that the single-phase transient earthing failure process of extra-high voltage half-wave power transmission circuit perfects mutually head in the embodiment of the present invention 2 Hold three phases power waveform figure；
Fig. 5 is the power of extra-high voltage half-wave power transmission circuit in single-phase transient earthing failure process in the embodiment of the present invention 2 Fluctuate overvoltage distribution character schematic diagram；
Fig. 6 is that extra-high voltage half-wave power transmission circuit perfects phase in single-phase transient earthing failure process in the embodiment of the present invention 2 Three phases power swing over-voltage waveform figure in the middle part of circuit；
Fig. 7 is that arrester is maximum along extra-high voltage half-wave power transmission circuit under uniform configuration strategy in the embodiment of the present invention 2 Absorbing energy distribution characteristic schematic diagram；
Fig. 8 is that the line unit of extra-high voltage half-wave power transmission circuit under differentiation configuration strategy in the embodiment of the present invention 2 needs Configure arrester quantity schematic diagram；
Fig. 9 is that 8 groups of Allocation of Lightning Arrester strategies of the 10th line unit show under differentiation configuration strategy in the embodiment of the present invention 2 It is intended to；
Figure 10 is 7 groups of Allocation of Lightning Arrester strategies of the 12nd line unit under differentiation configuration strategy in the embodiment of the present invention 2 Schematic diagram；
Figure 11 is the power swing mistake of extra-high voltage half-wave power transmission circuit under differentiation strategy scheme in the embodiment of the present invention 2 Voltage oscillogram；
Figure 12 is that arrester is most along extra-high voltage half-wave power transmission circuit under differentiation configuration strategy in the embodiment of the present invention 2 Big absorbing energy distribution figure；
Figure 13 be in the embodiment of the present invention 2 optimize after differentiation configuration strategy under extra-high voltage half-wave power transmission circuit work( Rate fluctuates over-voltage waveform figure；
Figure 14 is under differentiation configuration strategy after optimizing in the embodiment of the present invention 2 along extra-high voltage half-wave power transmission circuit Arrester absorption maximum energy profile.
Embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings.
The embodiment of the present invention 1 provides a kind of control method of half-wave power transmission line power fluctuation overvoltage, this method Particular flow sheet is as shown in Figure 1, detailed process is as follows：
S101：Determine along half-wave power transmission circuit power waves in the uniform configuration strategy of arrester and uniform configuration strategy The absorption maximum energy of the dynamic lower arrester of overvoltage effect；
S102：The absorption maximum of the lower arrester of power swing overvoltage effect in the uniform configuration strategy obtained according to S101 Energy determines the differentiation configuration strategy of arrester along half-wave power transmission circuit, and determines half-wavelength in differentiation configuration strategy The power swing overvoltage of transmission line of electricity, the duration of power swing overvoltage and the lower arrester of power swing overvoltage effect Absorption maximum energy；
S103：Judge power swing overvoltage, the work(of half-wave power transmission circuit in the differentiation configuration strategy that S102 is obtained Whether the absorption maximum energy of the duration of rate fluctuation overvoltage and the lower arrester of power swing overvoltage effect meets at the same time Power fluctuation limit requirement, differentiation configuration strategy is optimized if meeting at the same time, otherwise to differentiation configuration strategy into Row is corrected.
The power swing overvoltage of half-wave power transmission circuit mentioned in the embodiment of the present invention 1 refers to：Half-wave power transmission When the power swing produced in the case of breaking down on circuit exceedes natural power, occur on half-wave power transmission circuit excessively electric Pressure；
The amplitude of above-mentioned power swing overvoltage is proportional to the ratio of power swing and half-wave power transmission circuit natural power；
The duration of above-mentioned power swing overvoltage and the power swing time consistency of half-wave power transmission circuit；
If failure is single-phase transient earthing failure, the failure process of single-phase transient earthing failure include process during failure, Single-phase earthing transient fault sequential and process such as Fig. 2 occur for reclosing process and rocking process, specific half-wave power transmission circuit It is shown, the t in Fig. 20Singlephase earth fault moment, t occurs for half-wave power transmission circuitB1For the failure phase circuit breaker trip moment； tB2For failure phase breaker Reclosing Instant.
S101 specifically includes following steps：
1st, the uniform configuration strategy of arrester along half-wave power transmission circuit is determined according to procedure below：
Half-wave power transmission circuit is evenly dividing for multiple line units, and at the end of each line unit with regular length The arrester of point identical group of number of installing；
2nd, the absorption maximum of the lower arrester of power swing overvoltage effect in uniform configuration strategy is determined according to procedure below Energy：
Under the conditions of half-wave power transmission circuit total transfer capability, pass through the electromagnetic transient simulation mould of half-wave power transmission system Type determines the absorption maximum energy of the lower arrester of power swing overvoltage effect in uniform configuration strategy.
S102 specifically includes following steps：
1st, half-wave is determined according to the absorption maximum energy of the lower arrester of power swing overvoltage effect in uniform configuration strategy The differentiation configuration strategy of arrester, detailed process are as follows along long power transmission line：
The 80% of arrester absorption energy capability is no more than with the absorption maximum energy of single group arrester, is each taken shelter from the thunder It is principle that device installation site, which at most installs two groups of arresters and preferentially installs arrester in circuit cell end, in each circuit The terminal point of unit and internal zinc oxide surge arresters；The detailed process of the terminal point of line unit and internal zinc oxide surge arresters is such as Under：
1) terminal point of line unit and the installation number of internal lightning arrester are determined, is specifically had：
If the terminal point of line unit and internal installation m group arresters altogether, power swing is excessively electric in uniform configuration strategy The absorption maximum energy of the lower arrester of pressure effect is EU, work as EU＜ 0.8EMWhen, m=1；Work as EU≥0.8EMWhen, m=[EU/ 0.8EM], [] represents round, wherein, EMEnergy capability is absorbed for arrester；
2) terminal point of line unit and the installation site of internal lightning arrester are determined, specifically there are following three kinds of situations：
1. during m=1, one group of arrester is installed in circuit cell end endpoint；
2. during m=2, two groups of arresters are installed in circuit cell end endpoint；
3. during m >=3, line unit terminal point installs two groups of arresters, and remaining Allocation of Lightning Arrester is in the following way Inside line unit：
Remaining Allocation of Lightning Arrester be d, 2d with line unit terminal point distance ..., at the position of kd, wherein, k is Natural number, d represents the span of half-wave power transmission circuit, when m is even number,When m is odd number,
2nd, the power swing overvoltage of half-wave power transmission circuit in differentiation configuration strategy, power swing overvoltage are determined Duration and the absorption maximum energy of the lower arrester of power swing overvoltage effect, detailed process are as follows：
Under the conditions of half-wave power transmission circuit total transfer capability, pass through the electromagnetic transient simulation mould of half-wave power transmission system Type determines the power swing overvoltage of half-wave power transmission circuit in differentiation configuration strategy, the duration of power swing overvoltage The absorption maximum energy of lower arrester is acted on power swing overvoltage.
Above-mentioned power fluctuation limit requirement specifically includes following three aspects：
1) the not super 1.4p.u. of the power swing overvoltage of substation line side, and the power swing mistake of substation line side The duration of voltage is not more than 0.5s；
2) the power swing Overvoltage Amplitude of half-wave power transmission circuit and the power swing of half-wave power transmission circuit are excessively electric The duration of pressure is satisfied by arrester temporary overvoltage tolerance performance；
3) absorption maximum energy of the arrester under the effect of power swing overvoltage meets to keep away along half-wave power transmission circuit Thunder device absorbs energy capability.
In above-mentioned S103, the power swing overvoltage of half-wave power transmission circuit, power swing mistake in differentiation configuration strategy The absorption maximum energy of the duration of voltage and the lower arrester of power swing overvoltage effect meets power fluctuation limit at the same time It is required that when, differentiation configuration strategy is optimized according to procedure below：
Arrester installation site is first set on half-wave power transmission circuit as L1,…,Lh,…,LH, single group arrester absorption maximum Energy is Eh, h=1,2 ..., H, H represent half-wave power transmission circuit on arrester installation site sum；
Then it is divided into following two situations：
If 1. Eh＜ 0.5EMAnd line unit terminal point and internal shared at least two groups of arresters, according to from line unit The principle that head end reduces by one group of arrester to line unit end every time updates differentiation configuration strategy, and according to half-wave power transmission The electromagnetic transient simulation model of system determines the power swing mistake of half-wave power transmission circuit in the differentiation configuration strategy after renewal The absorption maximum energy of voltage, the duration of power swing overvoltage and the lower arrester of power swing overvoltage effect, and sentence The power swing overvoltage of half-wave power transmission circuit in differentiation configuration strategy after disconnected renewal, power swing overvoltage continue Whether the absorption maximum energy of time and the lower arrester of power swing overvoltage effect meets power fluctuation limit requirement at the same time, if It is, using the differentiation configuration strategy after renewal as final Allocation of Lightning Arrester strategy, otherwise to configure the differentiation before renewal Strategy is as final Allocation of Lightning Arrester strategy；
If 2. 0.5EM≤Eh≤EMAnd the power swing overvoltage of half-wave power transmission circuit, power in differentiation configuration strategy Fluctuate the duration of overvoltage and the absorption maximum energy of the lower arrester of power swing overvoltage effect meets power waves at the same time Dynamic limitation requires, then using differentiation configuration strategy as final Allocation of Lightning Arrester strategy.
In above-mentioned S103, the power swing overvoltage of half-wave power transmission circuit, power swing mistake in differentiation configuration strategy The absorption maximum energy of the duration of voltage and the lower arrester of power swing overvoltage effect cannot meet power swing at the same time When limitation requires, differentiation configuration strategy is modified according to procedure below：
The terminal point of line unit and the installation site of internal lightning arrester are first set as L1,…,Li,…,LN, i=1, 2 ..., N, N represent arrester installation site sum, L in line unitiRepresent i-th of installation site；
Then it is divided into following two situations：
If 1. LiClose to L1, then in L1And close to line unit head end and and L1Distance is to increase at the position of d according to each The principle of one group of arrester is added to correct differentiation configuration strategy, up to the power of half-wave power transmission circuit in differentiation configuration strategy Fluctuate the absorption maximum energy of overvoltage, the duration of power swing overvoltage and the lower arrester of power swing overvoltage effect Meet power fluctuation limit requirement at the same time, and using revised differentiation configuration strategy as final Allocation of Lightning Arrester strategy；
If 2. LiClose to LN, then close to half-wave power transmission line end and and LNDistance is to increase at the position of d according to each The principle of one group of arrester is added to correct differentiation configuration strategy, up to the power of half-wave power transmission circuit in differentiation configuration strategy Fluctuate the absorption maximum energy of overvoltage, the duration of power swing overvoltage and the lower arrester of power swing overvoltage effect Meet power fluctuation limit requirement at the same time, and using revised differentiation configuration strategy as final Allocation of Lightning Arrester strategy.
Based on same inventive concept, the embodiment of the present invention 1 additionally provides a kind of half-wave power transmission line power and fluctuated electricity The control device of pressure, the control method phase of the principle that these equipment solve the problems, such as and half-wave power transmission line power fluctuation overvoltage Seemingly, the embodiment of the present invention 1 provide half-wave power transmission line power fluctuation overvoltage control device include the first determining module, Second determining module and judgment module, introduce the concrete function of above three module separately below：
First determining module therein, for determining along half-wave power transmission circuit the uniform configuration strategy of arrester and The absorption maximum energy of the lower arrester of power swing overvoltage effect in even configuration strategy；
Second determining module therein, for according to the lower arrester of power swing overvoltage effect in uniform configuration strategy Absorption maximum energy determines the differentiation configuration strategy of arrester along half-wave power transmission circuit, and determines differentiation configuration strategy The power swing overvoltage of middle half-wave power transmission circuit, the duration of power swing overvoltage and the effect of power swing overvoltage The absorption maximum energy of lower arrester；
Judgment module therein, the power swing for judging half-wave power transmission circuit in differentiation configuration strategy are excessively electric At the same time whether the absorption maximum energy of pressure, the duration of power swing overvoltage and the lower arrester of power swing overvoltage effect Meet power fluctuation limit requirement, differentiation configuration strategy is optimized if meeting at the same time, plan otherwise is configured to differentiation Slightly it is modified.
The power swing overvoltage of above-mentioned half-wave power transmission circuit refers to：In the case of breaking down on half-wave power transmission circuit When the power swing of generation exceedes natural power, the overvoltage that occurs on half-wave power transmission circuit；
The amplitude of above-mentioned power swing overvoltage is proportional to the ratio of power swing and half-wave power transmission circuit natural power Value；
The duration of above-mentioned power swing overvoltage and the power swing time consistency of half-wave power transmission circuit；
If failure is single-phase transient earthing failure, the failure process of single-phase transient earthing failure include process during failure, Reclosing process and rocking process.
The first above-mentioned determining module determines the uniform configuration of arrester along half-wave power transmission circuit according to procedure below Strategy：
Half-wave power transmission circuit is evenly dividing for multiple line units, and at the end of each line unit with regular length The arrester of point identical group of number of installing.
The first above-mentioned determining module is determined in uniform configuration strategy under the effect of power swing overvoltage according to procedure below The absorption maximum energy of arrester：
Under the conditions of half-wave power transmission circuit total transfer capability, pass through the electromagnetic transient simulation mould of half-wave power transmission system Type determines the absorption maximum energy of the lower arrester of power swing overvoltage effect in uniform configuration strategy.
The second above-mentioned determining module acts on the maximum of lower arrester according to power swing overvoltage in uniform configuration strategy Absorb energy and press the differentiation configuration strategy that procedure below determines arrester along half-wave power transmission circuit：
The 80% of arrester absorption energy capability is no more than with the absorption maximum energy of single group arrester, is each taken shelter from the thunder It is principle that device installation site, which at most installs two groups of arresters and preferentially installs arrester in circuit cell end, in each circuit The detailed process of the terminal point of unit and internal zinc oxide surge arresters, the terminal point of line unit and internal zinc oxide surge arresters is such as Under：
1st, the terminal point of line unit and the installation number of internal lightning arrester are determined, including：
If the terminal point of line unit and internal installation m group arresters altogether, power swing is excessively electric in uniform configuration strategy The absorption maximum energy of the lower arrester of pressure effect is EU, work as EU＜ 0.8EMWhen, m=1；Work as EU≥0.8EMWhen, m=[EU/ 0.8EM], [] represents round, wherein, EMEnergy capability is absorbed for arrester；
2nd, the terminal point of line unit and the installation site of internal lightning arrester are determined, is specifically divided into following three kinds of situations：
1. during m=1, one group of arrester is installed in circuit cell end endpoint；
2. during m=2, two groups of arresters are installed in circuit cell end endpoint；
3. during m >=3, line unit terminal point installs two groups of arresters, and remaining Allocation of Lightning Arrester is in the following way Inside line unit：
Remaining Allocation of Lightning Arrester be d, 2d with line unit terminal point distance ..., at the position of kd, wherein, k is Natural number, d represents the span of half-wave power transmission circuit, when m is even number,When m is odd number,
The second above-mentioned determining module passes through half-wave power transmission system under the conditions of half-wave power transmission circuit total transfer capability The electromagnetic transient simulation model of system determines power swing overvoltage, the power waves of half-wave power transmission circuit in differentiation configuration strategy The duration of dynamic overvoltage and the absorption maximum energy of the lower arrester of power swing overvoltage effect.
Above-mentioned judgment module is specifically used for determining following power fluctuation limit requirement：
1) the not super 1.4p.u. of the power swing overvoltage of substation line side, and the power swing mistake of substation line side The duration of voltage is not more than 0.5s；
2) the power swing Overvoltage Amplitude of half-wave power transmission circuit and the power swing of half-wave power transmission circuit are excessively electric The duration of pressure is satisfied by arrester temporary overvoltage tolerance performance；
3) absorption maximum energy of the arrester under the effect of power swing overvoltage meets to keep away along half-wave power transmission circuit Thunder device absorbs energy capability.
Above-mentioned judgment module the power swing overvoltage of half-wave power transmission circuit, power swing in differentiation configuration strategy The absorption maximum energy of the duration of overvoltage and the lower arrester of power swing overvoltage effect meets that power swing limits at the same time When system requires, differentiation configuration strategy is optimized according to procedure below：
Arrester installation site is first set on half-wave power transmission circuit as L1,…,Lh,…,LH, single group arrester absorption maximum Energy is Eh, h=1,2 ..., H, H represent half-wave power transmission circuit on arrester installation site sum；
Then following two situations are divided：
If 1. Eh＜ 0.5EMAnd line unit terminal point and internal shared at least two groups of arresters, according to from line unit The principle that head end reduces by one group of arrester to line unit end every time updates differentiation configuration strategy, and according to half-wave power transmission The electromagnetic transient simulation model of system determines the power swing mistake of half-wave power transmission circuit in the differentiation configuration strategy after renewal The absorption maximum energy of voltage, the duration of power swing overvoltage and the lower arrester of power swing overvoltage effect, and sentence The power swing overvoltage of half-wave power transmission circuit in differentiation configuration strategy after disconnected renewal, power swing overvoltage continue Whether the absorption maximum energy of time and the lower arrester of power swing overvoltage effect meets power fluctuation limit requirement at the same time, if It is, using the differentiation configuration strategy after renewal as final Allocation of Lightning Arrester strategy, otherwise to configure the differentiation before renewal Strategy is as final Allocation of Lightning Arrester strategy；
If 2. 0.5EM≤Eh≤EMAnd the power swing overvoltage of half-wave power transmission circuit, power in differentiation configuration strategy Fluctuate the duration of overvoltage and the absorption maximum energy of the lower arrester of power swing overvoltage effect meets power waves at the same time Dynamic limitation requires, then using differentiation configuration strategy as final Allocation of Lightning Arrester strategy.
Above-mentioned judgment module the power swing overvoltage of half-wave power transmission circuit, power swing in differentiation configuration strategy The absorption maximum energy of the duration of overvoltage and the lower arrester of power swing overvoltage effect cannot meet power waves at the same time When dynamic limitation requires, differentiation configuration strategy is modified：
The terminal point of line unit and the installation site of internal lightning arrester are first set as L1,…,Li,…,LN, i=1, 2 ..., N, N represent arrester installation site sum, L in line unitiRepresent i-th of installation site；
Then following two situations are divided：
If 1. LiClose to L1, then in L1And close to line unit head end and and L1Distance is to increase at the position of d according to each The principle of one group of arrester is added to correct differentiation configuration strategy, up to the power of half-wave power transmission circuit in differentiation configuration strategy Fluctuate the absorption maximum energy of overvoltage, the duration of power swing overvoltage and the lower arrester of power swing overvoltage effect Meet power fluctuation limit requirement at the same time, and using revised differentiation configuration strategy as final Allocation of Lightning Arrester strategy；
If 2. LiClose to LN, then close to half-wave power transmission line end and and LNDistance is to increase at the position of d according to each The principle of one group of arrester is added to correct differentiation configuration strategy, up to the power of half-wave power transmission circuit in differentiation configuration strategy Fluctuate the absorption maximum energy of overvoltage, the duration of power swing overvoltage and the lower arrester of power swing overvoltage effect Meet power fluctuation limit requirement at the same time, and using revised differentiation configuration strategy as final Allocation of Lightning Arrester strategy.
Embodiment 2
Below by taking single time extra-high voltage half-wave power transmission system as an example, to half-wavelength AC transmission system work(proposed by the present invention The application of the control method of rate fluctuation overvoltage illustrates：
Certain point is to net extra-high voltage half-wave power transmission system wiring schematic diagram as shown in figure 3, its sending end uses 10 600MW machines Group boosts to 1000kV, accesses receiving-end system by the 3000km circuits of single time erection, receiving end is directly accessed 1000kV power grids.By End uses one machine infinity bus system, its capacity of short circuit is 40kA before the access of half-wave power transmission circuit.Its maximum delivery power is pressed 5000MW is designed.
The approximate order parameter of 1000kV single back lines is as shown in table 1：
Table 1
Ignore line loss, can obtain extra high voltage line wave impedance according to table 1 is1050kV Lower natural power is 4485MW (1p.u.), wavelength 5898km, the accurate a length of 2949km of half-wave.Half-wavelength is set in research to hand over Flow Line length is 3000km, totally 30 sections, every section of 100km.
Arrester rated voltage is 876kV along extra-high voltage half-wave power transmission system, it bears the requirement of temporary overvoltage As shown in table 2, it absorbs energy capability EMFor 42MJ.
The control method detailed process for the half-wave power transmission system power fluctuation overvoltage that the embodiment of the present invention 2 provides is such as Under：
Step 1：Determine along half-wave power transmission circuit power in the uniform configuration strategy of arrester and uniform configuration strategy Fluctuate the absorption maximum energy of the lower arrester of overvoltage effect：
Step 1-1：When extra-high voltage half-wave power transmission circuit is in the case of occurring single-phase transient fault, half-wave power transmission circuit On there are amplitude power swing, as shown in Figure 4.When power swing exceedes natural power, along half-wave power transmission circuit There is overvoltage, overvoltage extreme point is located at circuit stage casing along the line, as shown in Figure 5.The overvoltage of extreme point position such as Fig. 6 institutes Show, its amplitude (perunit value) is about the time of the ratio of power swing and natural power, overvoltage duration and power swing Unanimously.The overvoltage is the power swing overvoltage that the present invention defines.Power swing overvoltage is characterized in that temporary overvoltage Category, amplitude is high, duration length, and area coverage is wide along the line.
Over-voltage studies fault condition is fluctuated using single-phase transient earthing failure as half-wave power transmission line power, and will be single System rocking process during phase transient earthing process is divided into failure process, reclosing and after reclosing success totally three ranks Section.Singlephase earth fault moment t occurs for half-wave power transmission circuit0For 4s, the failure phase circuit breaker trip moment is tB1For 4.125s； Failure phase breaker Reclosing Instant tB2For 5.025s.
Step 1-2：Extra-high voltage half-wave power transmission circuit is evenly dividing as 30 line units with regular length 100km, And install 2 groups of arresters in the endpoint of each line unit.
Step 1-3：The absorption maximum energy of arrester is determined according to procedure below under uniform configuration strategy：In extra-high voltage half Under the conditions of wavelength transmission line of electricity total transfer capability 5000MW, determined by the electromagnetic transient simulation model of half-wave power transmission system Under uniform configuration strategy, the absorption maximum energy of the arrester in single-phase transient earthing failure process under the effect of power swing overvoltage Amount, as shown in Figure 7.
Step 2：Determined according to the absorption maximum energy of the lower arrester of power swing overvoltage effect in uniform configuration strategy The differentiation configuration strategy of arrester along half-wave power transmission circuit, and determine half-wave power transmission circuit in differentiation configuration strategy Power swing overvoltage, the duration of power swing overvoltage and the maximum suction of the lower arrester of power swing overvoltage effect Receive energy：
Step 2-1：Arrester along extra-high voltage half-wave power transmission circuit is determined according to the absorption maximum energy of arrester Differentiation configuration strategy includes：Arrester is no more than with the absorption maximum energy of single group arrester and absorbs energy capability 80% and each arrester installation site at most installing two groups of arresters be principle, in the endpoint and circuit list of each line unit First internal installing arrester.Line unit determines the installation number of arrester according to procedure below：
If the terminal point of line unit and internal installation m group arresters altogether, power swing is excessively electric in uniform configuration strategy The absorption maximum energy of the lower arrester of pressure effect is EU, work as EU＜ 0.8EMWhen, m=1；Work as EU≥0.8EMWhen, m=[EU/ 0.8EM], [] represents round, wherein, EMEnergy capability is absorbed for arrester.Thus extra-high voltage half-wavelength is obtained Each line unit needs to configure the quantity of arrester, including line unit terminal point and inside, such as Fig. 8 along transmission line of electricity It is shown, totally 93 groups of arresters.
Line unit determines the terminal point of line unit and the installation site of internal lightning arrester according to procedure below：
During m=1, one group of arrester is installed in circuit cell end endpoint；
During m=2, two groups of arresters are installed in circuit cell end endpoint；
During m >=3, line unit terminal point installs two groups of arresters, and remaining Allocation of Lightning Arrester exists in the following way Inside line unit：
Remaining Allocation of Lightning Arrester be 400m, 800m with line unit terminal point distance ..., the position of k × 400m Place, wherein, k is natural number, and the span of extra-high voltage half-wave power transmission circuit is 400m, when m is even number,M is odd number When,
With the 10th line unit (line unit of distance line head end 900km to 1000km) and the 12nd line unit Exemplified by (line unit of distance line head end 1100km to 1200km), the allocation position of multigroup arrester is illustrated：
According to Fig. 8, the 10th line unit needs to configure 8 groups of arresters altogether, then line unit terminal point installation 2 Group arrester, line-internal need to install 6 groups altogether.6 groups of Allocation of Lightning Arrester of line-internal are being with line unit terminal point distance At the position of 400m, 800m and 1200m, as shown in Figure 9.
According to Fig. 9, the 12nd line unit needs to configure 7 groups of arresters altogether, then line unit terminal point installation 2 Group arrester, line-internal need to install 5 groups altogether.5 groups of Allocation of Lightning Arrester of line-internal are being with line unit terminal point distance At the position of 400m, 800m and 1200m, as shown in Figure 10.
Step 2-2：Under the conditions of extra-high voltage half-wave power transmission circuit total transfer capability 5000MW, pass through half-wave power transmission The electromagnetic transient simulation model of system determines the power swing overvoltage of half-wavelength transmission line of electricity under differentiation configuration strategy, power Fluctuate the absorption maximum energy of overvoltage duration and arrester：Power swing overvoltage maximum amplitude is 1.56pu along the line, The overvoltage duration of 1.5~1.56pu is 1.15s, as shown in figure 11；Arrester (single group) is most along extra-high voltage half-wavelength Big absorbing energy distribution is as shown in figure 12.
Step 3：Judge that power swing overvoltage, the power swing of half-wavelength transmission line of electricity under differentiation configuration strategy are excessively electric Whether the absorption maximum energy of pressure duration and arrester meets power fluctuation limit requirement at the same time, to difference if meeting at the same time Alienation configuration strategy optimizes, and otherwise differentiation configuration strategy is modified：
Step 3-1：Determine that following half-wave power transmission system power fluctuation limitations require：
1) the not super 1.4p.u. of the power swing overvoltage in ultra-high voltage transformer station line side, and the power of substation line side The duration of fluctuation overvoltage is not more than 0.5s；
2) the power swing Overvoltage Amplitude of half-wave power transmission circuit and the power swing of half-wave power transmission circuit are excessively electric The duration of pressure is satisfied by arrester temporary overvoltage tolerance performance, specific as shown in table 2：
Table 2
3) absorption maximum energy of the arrester under the effect of power swing overvoltage meets to keep away along half-wave power transmission circuit Thunder device absorbs energy capability.
Step 3-2：Differentiation configuration strategy is optimized：
If arrester installation site is L on extra-high voltage half-wave power transmission circuit1,…,Lh,…,LH, LhSingle group arrester is most The big energy that absorbs is Eh, h=1,2 ..., H, H represent half-wave power transmission circuit on arrester installation site sum.
According to Figure 12, the arrester absorption maximum energy of the line unit of the 14th, 15 and 16 is less than 21MJ (0.5EM), and end End and internal shared at least two groups of arresters；The absorption maximum energy of All other routes unit arrester meets 0.5EM≤Eh≤EM, And power swing overvoltage, power swing overvoltage duration meet power fluctuation limit requirement.Therefore according to from circuit list The principle that first head end reduces by one group of arrester to line unit end updates the 14th, 15 and 16 circuit lists in differentiation configuration strategy The configuration quantity of the arrester of member.And the differentiation after renewal is determined according to the electromagnetic transient simulation model of half-wave power transmission system The maximum of the power swing overvoltage of half-wavelength transmission line of electricity, power swing overvoltage duration and arrester under configuration strategy Absorb energy：Power swing overvoltage maximum amplitude is 1.56pu along the line, and the overvoltage duration of 1.5~1.56pu is 1.15s as shown in figure 13；Arrester (single group) absorption maximum Energy distribution is as shown in figure 14 along extra-high voltage half-wavelength.It is above-mentioned As a result power fluctuation limit requirement can be met, therefore using the differentiation configuration strategy after renewal as final Allocation of Lightning Arrester Strategy.Extra-high voltage half-wave power transmission circuit need to configure 90 groups of arresters altogether.
For convenience of description, each several part of apparatus described above is divided into various modules with function or unit describes respectively. Certainly, each module or the function of unit can be realized in same or multiple softwares or hardware when implementing the application.
It should be understood by those skilled in the art that, embodiments herein can be provided as method, system or computer program Product.Therefore, the application can use the reality in terms of complete hardware embodiment, complete software embodiment or combination software and hardware Apply the form of example.Moreover, the application can use the computer for wherein including computer usable program code in one or more The computer program production that usable storage medium is implemented on (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) The form of product.
The application is with reference to the flow according to the method for the embodiment of the present application, equipment (system) and computer program product Figure and/or block diagram describe.It should be understood that it can be realized by computer program instructions every first-class in flowchart and/or the block diagram The combination of flow and/or square frame in journey and/or square frame and flowchart and/or the block diagram.These computer programs can be provided The processors of all-purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices is instructed to produce A raw machine so that the instruction performed by computer or the processor of other programmable data processing devices, which produces, to be used in fact The device for the function of being specified in present one flow of flow chart or one square frame of multiple flows and/or block diagram or multiple square frames.
These computer program instructions, which may also be stored in, can guide computer or other programmable data processing devices with spy Determine in the computer-readable memory that mode works so that the instruction being stored in the computer-readable memory, which produces, to be included referring to Make the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one square frame of block diagram or The function of being specified in multiple square frames.
These computer program instructions can be also loaded into computer or other programmable data processing devices so that counted Series of operation steps is performed on calculation machine or other programmable devices to produce computer implemented processing, thus in computer or The instruction performed on other programmable devices is provided and is used for realization in one flow of flow chart or multiple flows and/or block diagram one The step of function of being specified in a square frame or multiple square frames.
Finally it should be noted that：The above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof, institute The those of ordinary skill in category field with reference to above-described embodiment still can to the present invention embodiment modify or Equivalent substitution, these are applying for this pending hair without departing from any modification of spirit and scope of the invention or equivalent substitution Within bright claims.

Claims (20)

  1. A kind of 1. control method of half-wave power transmission line power fluctuation overvoltage, it is characterised in that including：
    Determine along half-wave power transmission circuit power swing overvoltage in the uniform configuration strategy of arrester and uniform configuration strategy The absorption maximum energy of the lower arrester of effect；
    Half-wave power transmission is determined according to the absorption maximum energy of the lower arrester of power swing overvoltage effect in uniform configuration strategy The differentiation configuration strategy of arrester along circuit, and determine the power swing of half-wave power transmission circuit in differentiation configuration strategy The absorption maximum energy of overvoltage, the duration of power swing overvoltage and the lower arrester of power swing overvoltage effect；
    Judge the power swing overvoltage of half-wave power transmission circuit in differentiation configuration strategy, power swing overvoltage it is lasting when Between and the absorption maximum energy of the lower arrester of power swing overvoltage effect whether meet power fluctuation limit requirement at the same time, if together When meet then differentiation configuration strategy is optimized, otherwise differentiation configuration strategy is modified.
  2. 2. the control method of half-wave power transmission line power fluctuation overvoltage according to claim 1, it is characterised in that institute State the power that the power swing overvoltage of half-wave power transmission circuit includes producing in the case of breaking down on half-wave power transmission circuit Fluctuation is when exceeding natural power, the overvoltage occurred on half-wave power transmission circuit；
    The amplitude of the power swing overvoltage is proportional to the ratio of power swing and half-wave power transmission circuit natural power；
    The duration of the power swing overvoltage and the power swing time consistency of half-wave power transmission circuit；
    If failure is single-phase transient earthing failure, the failure process of the single-phase transient earthing failure include process during failure, Reclosing process and rocking process.
  3. 3. the control method of half-wave power transmission line power fluctuation overvoltage according to claim 2, it is characterised in that institute The uniform configuration strategy for stating arrester along half-wave power transmission circuit is determined according to procedure below：
    Half-wave power transmission circuit is evenly dividing as multiple line units with regular length, and is filled in the endpoint of each line unit If the arrester of identical group of number.
  4. 4. the control method of half-wave power transmission line power fluctuation overvoltage according to claim 3, it is characterised in that institute The absorption maximum energy for stating the lower arrester of power swing overvoltage effect in uniform configuration strategy is determined according to procedure below：
    It is true by the electromagnetic transient simulation model of half-wave power transmission system under the conditions of half-wave power transmission circuit total transfer capability The absorption maximum energy of the lower arrester of power swing overvoltage effect in fixed uniform configuration strategy.
  5. 5. the control method of half-wave power transmission line power fluctuation overvoltage according to claim 4, it is characterised in that institute State and half-wave power transmission line is determined according to the absorption maximum energy of the lower arrester of power swing overvoltage effect in uniform configuration strategy The differentiation configuration strategy of curb line arrester includes：
    Arrester is no more than with the absorption maximum energy of single group arrester and absorbs the 80% of energy capability, each arrester peace It is principle that holding position, which at most installs two groups of arresters and preferentially installs arrester in circuit cell end, in each line unit Terminal point and internal zinc oxide surge arresters.
  6. 6. the control method of half-wave power transmission line power fluctuation overvoltage according to claim 5, it is characterised in that institute The terminal point and internal zinc oxide surge arresters for stating line unit include：
    Determine the terminal point of line unit and the installation number of internal lightning arrester, including：
    If the terminal point of line unit and internal installation m group arresters altogether, power swing overvoltage is made in uniform configuration strategy It is E with the absorption maximum energy of lower arresterU, work as EU＜ 0.8EMWhen, m=1；Work as EU≥0.8EMWhen, m=[EU/0.8EM], [] Represent round, wherein, EMEnergy capability is absorbed for arrester；
    Determine the terminal point of line unit and the installation site of internal lightning arrester, including：
    During m=1, one group of arrester is installed in circuit cell end endpoint；
    During m=2, two groups of arresters are installed in circuit cell end endpoint；
    During m >=3, line unit terminal point installs two groups of arresters, and remaining Allocation of Lightning Arrester is in the following way in circuit Inside unit：
    Remaining Allocation of Lightning Arrester be d, 2d with line unit terminal point distance ..., at the position of kd, wherein, k is nature Number, d represents the span of half-wave power transmission circuit, when m is even number,When m is odd number,
  7. 7. the control method of half-wave power transmission line power fluctuation overvoltage according to claim 6, it is characterised in that institute State the power swing overvoltage of half-wave power transmission circuit, the duration of power swing overvoltage in definite differentiation configuration strategy The absorption maximum energy of lower arrester is acted on power swing overvoltage to be included：
    It is true by the electromagnetic transient simulation model of half-wave power transmission system under the conditions of half-wave power transmission circuit total transfer capability Determine the power swing overvoltage of half-wave power transmission circuit in differentiation configuration strategy, the duration of power swing overvoltage and work( The absorption maximum energy of the lower arrester of rate fluctuation overvoltage effect.
  8. 8. the control method of half-wave power transmission line power fluctuation overvoltage according to claim 7, it is characterised in that institute Power fluctuation limit is stated to require to include：
    1) the not super 1.4p.u. of the power swing overvoltage of substation line side, and the power swing overvoltage of substation line side Duration be not more than 0.5s；
    2) the power swing overvoltage of the power swing Overvoltage Amplitude of half-wave power transmission circuit and half-wave power transmission circuit Duration is satisfied by arrester temporary overvoltage tolerance performance；
    3) absorption maximum energy of the arrester under the effect of power swing overvoltage meets arrester along half-wave power transmission circuit Absorb energy capability.
  9. 9. the control method of half-wave power transmission line power fluctuation overvoltage according to claim 8, it is characterised in that institute State differentiation configuration strategy is optimized including：
    If arrester installation site is L on half-wave power transmission circuit1,…,Lh,…,LH, single group arrester absorption maximum energy is Eh, h=1,2 ..., H, H represent half-wave power transmission circuit on arrester installation site sum；
    If Eh＜ 0.5EMAnd line unit terminal point and internal shared at least two groups of arresters, according to from line unit head end to The principle renewal differentiation configuration strategy of one group of arrester is reduced in line unit end every time, and according to half-wave power transmission system Electromagnetic transient simulation model determines the power swing overvoltage of half-wave power transmission circuit, work(in the differentiation configuration strategy after renewal The duration of rate fluctuation overvoltage and the absorption maximum energy of the lower arrester of power swing overvoltage effect, and after judging renewal Differentiation configuration strategy in the power swing overvoltage of half-wave power transmission circuit, the duration of power swing overvoltage and work( Whether the absorption maximum energy of the lower arrester of rate fluctuation overvoltage effect meets power fluctuation limit requirement at the same time, if so, will more Differentiation configuration strategy after new as final Allocation of Lightning Arrester strategy, otherwise using the differentiation configuration strategy before renewal as Final Allocation of Lightning Arrester strategy；
    If 0.5EM≤Eh≤EMAnd the power swing overvoltage of half-wave power transmission circuit, power swing mistake in differentiation configuration strategy The absorption maximum energy of the duration of voltage and the lower arrester of power swing overvoltage effect meets power fluctuation limit at the same time It is required that then using differentiation configuration strategy as final Allocation of Lightning Arrester strategy.
  10. 10. the control method of half-wave power transmission line power fluctuation overvoltage according to claim 8, it is characterised in that It is described differentiation configuration strategy is modified including：
    If the terminal point of line unit and the installation site of internal lightning arrester are L1,…,Li,…,LN, i=1,2 ..., N, N tables Show arrester installation site sum, L in line unitiRepresent i-th of installation site；
    If LiClose to L1, then in L1And close to line unit head end and and L1Distance is according to each one group of increase at the position of d The principle of arrester corrects differentiation configuration strategy, up to the power swing mistake of half-wave power transmission circuit in differentiation configuration strategy The absorption maximum energy of voltage, the duration of power swing overvoltage and the lower arrester of power swing overvoltage effect is full at the same time Sufficient power fluctuation limit requirement, and using revised differentiation configuration strategy as final Allocation of Lightning Arrester strategy；
    If LiClose to LN, then close to half-wave power transmission line end and and LNDistance is according to each one group of increase at the position of d The principle of arrester corrects differentiation configuration strategy, up to the power swing mistake of half-wave power transmission circuit in differentiation configuration strategy The absorption maximum energy of voltage, the duration of power swing overvoltage and the lower arrester of power swing overvoltage effect is full at the same time Sufficient power fluctuation limit requirement, and using revised differentiation configuration strategy as final Allocation of Lightning Arrester strategy.
  11. A kind of 11. control device of half-wave power transmission line power fluctuation overvoltage, it is characterised in that including：
    First determining module, for determining the uniform configuration strategy of arrester and uniform configuration strategy along half-wave power transmission circuit The absorption maximum energy of the middle lower arrester of power swing overvoltage effect；
    Second determining module, for the absorption maximum energy according to the lower arrester of power swing overvoltage effect in uniform configuration strategy Amount determines the differentiation configuration strategy of arrester along half-wave power transmission circuit, and determines that half-wavelength is defeated in differentiation configuration strategy Arrester under the power swing overvoltage of electric line, the duration of power swing overvoltage and the effect of power swing overvoltage Absorption maximum energy；
    Judgment module, for judging power swing overvoltage, the power swing of half-wave power transmission circuit in differentiation configuration strategy Whether the absorption maximum energy of the duration of overvoltage and the lower arrester of power swing overvoltage effect meets power waves at the same time Dynamic limitation requires, and differentiation configuration strategy is optimized if meeting at the same time, otherwise differentiation configuration strategy is modified.
  12. 12. the control device of half-wave power transmission line power fluctuation overvoltage according to claim 11, it is characterised in that The power swing overvoltage of the half-wave power transmission circuit includes the work(produced in the case of breaking down on half-wave power transmission circuit Rate fluctuation is when exceeding natural power, the overvoltage occurred on half-wave power transmission circuit；
    The amplitude of the power swing overvoltage is proportional to the ratio of power swing and half-wave power transmission circuit natural power；
    The duration of the power swing overvoltage and the power swing time consistency of half-wave power transmission circuit；
    If failure is single-phase transient earthing failure, the failure process of the single-phase transient earthing failure include process during failure, Reclosing process and rocking process.
  13. 13. the control device of half-wave power transmission line power fluctuation overvoltage according to claim 12, it is characterised in that First determining module is specifically used for：
    Half-wave power transmission circuit is evenly dividing as multiple line units with regular length, and is filled in the endpoint of each line unit If the arrester of identical group of number.
  14. 14. the control device of half-wave power transmission line power fluctuation overvoltage according to claim 13, it is characterised in that First determining module is specifically used for：
    It is true by the electromagnetic transient simulation model of half-wave power transmission system under the conditions of half-wave power transmission circuit total transfer capability The absorption maximum energy of the lower arrester of power swing overvoltage effect in fixed uniform configuration strategy.
  15. 15. the control device of half-wave power transmission line power fluctuation overvoltage according to claim 14, it is characterised in that Second determining module is specifically used for：
    Arrester is no more than with the absorption maximum energy of single group arrester and absorbs the 80% of energy capability, each arrester peace It is principle that holding position, which at most installs two groups of arresters and preferentially installs arrester in circuit cell end, in each line unit Terminal point and internal zinc oxide surge arresters.
  16. 16. the control device of half-wave power transmission line power fluctuation overvoltage according to claim 15, it is characterised in that Second determining module is specifically used for：
    Determine the terminal point of line unit and the installation number of internal lightning arrester, including：
    If the terminal point of line unit and internal installation m group arresters altogether, power swing overvoltage is made in uniform configuration strategy It is E with the absorption maximum energy of lower arresterU, work as EU＜ 0.8EMWhen, m=1；Work as EU≥0.8EMWhen, m=[EU/0.8EM], [] Represent round, wherein, EMEnergy capability is absorbed for arrester；
    Determine the terminal point of line unit and the installation site of internal lightning arrester, including：
    During m=1, one group of arrester is installed in circuit cell end endpoint；
    During m=2, two groups of arresters are installed in circuit cell end endpoint；
    During m >=3, line unit terminal point installs two groups of arresters, and remaining Allocation of Lightning Arrester is in the following way in circuit Inside unit：
    Remaining Allocation of Lightning Arrester be d, 2d with line unit terminal point distance ..., at the position of kd, wherein, k is nature Number, d represents the span of half-wave power transmission circuit, when m is even number,When m is odd number,
  17. 17. the control device of half-wave power transmission line power fluctuation overvoltage according to claim 16, it is characterised in that Second determining module is specifically used for：
    It is true by the electromagnetic transient simulation model of half-wave power transmission system under the conditions of half-wave power transmission circuit total transfer capability Determine the power swing overvoltage of half-wave power transmission circuit in differentiation configuration strategy, the duration of power swing overvoltage and work( The absorption maximum energy of the lower arrester of rate fluctuation overvoltage effect.
  18. 18. the control device of half-wave power transmission line power fluctuation overvoltage according to claim 17, it is characterised in that The judgment module is specifically used for determining following power fluctuation limit requirement：
    1) the not super 1.4p.u. of the power swing overvoltage of substation line side, and the power swing overvoltage of substation line side Duration be not more than 0.5s；
    2) the power swing overvoltage of the power swing Overvoltage Amplitude of half-wave power transmission circuit and half-wave power transmission circuit Duration is satisfied by arrester temporary overvoltage tolerance performance；
    3) absorption maximum energy of the arrester under the effect of power swing overvoltage meets arrester along half-wave power transmission circuit Absorb energy capability.
  19. 19. the control device of half-wave power transmission line power fluctuation overvoltage according to claim 18, it is characterised in that The judgment module specifically optimizes differentiation configuration strategy according to procedure below：
    If arrester installation site is L on half-wave power transmission circuit1,…,Lh,…,LH, single group arrester absorption maximum energy is Eh, h=1,2 ..., H, H represent half-wave power transmission circuit on arrester installation site sum；
    If Eh＜ 0.5EMAnd line unit terminal point and internal shared at least two groups of arresters, according to from line unit head end to The principle renewal differentiation configuration strategy of one group of arrester is reduced in line unit end every time, and according to half-wave power transmission system Electromagnetic transient simulation model determines the power swing overvoltage of half-wave power transmission circuit, work(in the differentiation configuration strategy after renewal The duration of rate fluctuation overvoltage and the absorption maximum energy of the lower arrester of power swing overvoltage effect, and after judging renewal Differentiation configuration strategy in the power swing overvoltage of half-wave power transmission circuit, the duration of power swing overvoltage and work( Whether the absorption maximum energy of the lower arrester of rate fluctuation overvoltage effect meets power fluctuation limit requirement at the same time, if so, will more Differentiation configuration strategy after new as final Allocation of Lightning Arrester strategy, otherwise using the differentiation configuration strategy before renewal as Final Allocation of Lightning Arrester strategy；
    If 0.5EM≤Eh≤EMAnd the power swing overvoltage of half-wave power transmission circuit, power swing mistake in differentiation configuration strategy The absorption maximum energy of the duration of voltage and the lower arrester of power swing overvoltage effect meets power fluctuation limit at the same time It is required that then using differentiation configuration strategy as final Allocation of Lightning Arrester strategy.
  20. 20. the control device of half-wave power transmission line power fluctuation overvoltage according to claim 28, it is characterised in that The judgment module is specifically modified differentiation configuration strategy according to procedure below：
    If the terminal point of line unit and the installation site of internal lightning arrester are L1,…,Li,…,LN, i=1,2 ..., N, N tables Show arrester installation site sum, L in line unitiRepresent i-th of installation site；
    If LiClose to L1, then in L1And close to line unit head end and and L1Distance is according to each one group of increase at the position of d The principle of arrester corrects differentiation configuration strategy, up to the power swing mistake of half-wave power transmission circuit in differentiation configuration strategy The absorption maximum energy of voltage, the duration of power swing overvoltage and the lower arrester of power swing overvoltage effect is full at the same time Sufficient power fluctuation limit requirement, and using revised differentiation configuration strategy as final Allocation of Lightning Arrester strategy；
    If LiClose to LN, then close to half-wave power transmission line end and and LNDistance is according to each one group of increase at the position of d The principle of arrester corrects differentiation configuration strategy, up to the power swing mistake of half-wave power transmission circuit in differentiation configuration strategy The absorption maximum energy of voltage, the duration of power swing overvoltage and the lower arrester of power swing overvoltage effect is full at the same time Sufficient power fluctuation limit requirement, and using revised differentiation configuration strategy as final Allocation of Lightning Arrester strategy.
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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4016485A (en) * 1976-03-02 1977-04-05 German Ivanovich Samorodov Arrangement for limiting dynamic overvoltages
US20110013333A1 (en) * 2009-07-17 2011-01-20 Searete Llc, Polarized lightning arrestors
CN106130021A (en) * 2016-06-23 2016-11-16 全球能源互联网研究院 A kind of flexible tuner of T-shaped mixing
CN106597148A (en) * 2016-11-24 2017-04-26 云南电网有限责任公司电力科学研究院 Residual voltage monitoring based state monitoring system and method for lightning arrester without serial gap
CN106849118A (en) * 2017-01-16 2017-06-13 许继集团有限公司 A kind of half-wave power transmission mixing tuning system based on power electronics commutation technique
CN107132409A (en) * 2017-02-23 2017-09-05 中国电力科学研究院 A kind of determination method and apparatus of half-wave power transmission line steady-state voltage limits

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4016485A (en) * 1976-03-02 1977-04-05 German Ivanovich Samorodov Arrangement for limiting dynamic overvoltages
US20110013333A1 (en) * 2009-07-17 2011-01-20 Searete Llc, Polarized lightning arrestors
CN106130021A (en) * 2016-06-23 2016-11-16 全球能源互联网研究院 A kind of flexible tuner of T-shaped mixing
CN106597148A (en) * 2016-11-24 2017-04-26 云南电网有限责任公司电力科学研究院 Residual voltage monitoring based state monitoring system and method for lightning arrester without serial gap
CN106849118A (en) * 2017-01-16 2017-06-13 许继集团有限公司 A kind of half-wave power transmission mixing tuning system based on power electronics commutation technique
CN107132409A (en) * 2017-02-23 2017-09-05 中国电力科学研究院 A kind of determination method and apparatus of half-wave power transmission line steady-state voltage limits

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