CN103986163A - System and method for restraining induced current and voltage between double-circuit lines on same tower - Google Patents
System and method for restraining induced current and voltage between double-circuit lines on same tower Download PDFInfo
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- CN103986163A CN103986163A CN201410234572.6A CN201410234572A CN103986163A CN 103986163 A CN103986163 A CN 103986163A CN 201410234572 A CN201410234572 A CN 201410234572A CN 103986163 A CN103986163 A CN 103986163A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
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Abstract
The invention discloses a system and method for restraining the induced current and voltage between double circuits on the same tower. The system comprises two transformer substations and earthing knife-switch control systems of the two transformer substations, the two transformer substations are connected with a first circuit and a second circuit respectively, and an impedor is arranged between an earthing knife-switch of the first transformer substation and an earth screen in series and is connected with a contactor in parallel. The purpose of restraining the induced current but not increasing the circuit voltage is achieved by connecting an impedor-contactor parallel system between the earthing knife-switch of one transformer substation and the earth screen in series, the operation circuit of an original earthing knife-switch is optimized and designed to lower the operation complexity during repairing, and the switching of the contactor connected with the impedor in parallel is automatically controlled. By means of the system, the electromagnetic induction current can be effectively reduced, the requirements of high-capacity, long-distance and compact double-circuit electric transmission lines on the same tower are met, and the equipment manufacturing cost is reduced. A solution of not replacing the earthing knife-switch when the electromagnetic induction current and voltage of an established transformer substation exceed the standard is provided.
Description
Technical field
The present invention relates to power transmission lines overhauling technical field, specifically the inhibition system and method for induced current voltage between a kind of common-tower double-return circuit.
Background technology
Along with day being becoming tight of the development of electrical network and power transmission line corridor, be the floor space that reduces transmission of electricity corridor, the even many back transmission lines of common-tower double-return obtain large-area applications.Between two loop line roads of same tower double back transmission line, exist stronger electrostatic coupling and electromagnetic coupled, when a loop line road is normally moved, when the interruption maintenance of another loop line road, on stoppage in transit circuit, can produce induced current voltage.
Coupling between two circuits of same tower double back transmission line mainly contains electrostatic coupling and electromagnetic coupled, supposes that circuit I normally moves, circuit II interruption maintenance, using maintenance circuit A as research object, the coupling between circuit as depicted in figs. 1 and 2, in Fig. 1 and Fig. 2, C
i A II A, C
i B II A, C
i C II Arepresent the electric capacity of unit length between circuit I ABC three-phase and circuit II A are mutually, C
iI Arepresent the electric capacity of circuit II unit length; M
i A II A, M
i B II A, M
i C II Arepresent the mutual inductance of unit length between circuit I ABC three-phase and circuit II A are mutually, L
iI Arepresent the self-induction of circuit II unit length.Circuit I voltage is U
i A, U
i B, U
i Celectric current is I
i A, I
i B, I
i C; Circuit II A phase electrostatic induction voltage is U
iI SA, static induced current is I
iI SA; Circuit II A phase electromagnetic induction voltage is U
iI MA, em induced current is I
iI MA.
As shown in Figure 1, in the time overhauling circuit both sides earthed switch all in off-state, electrostatic induction voltage plays an important role on maintenance circuit, easily obtains:
From (1) formula, electrostatic induction voltage only has relation with the imbalance of electric pressure and circuit capacitive coupling, irrelevant with line length and through-put power.
When maintenance circuit one side earthed switch is in off-state, opposite side earthed switch is in "on" position, and the electric current flowing through on circuit is mainly static induced current, can obtain:
I
SIIA＝jωl(C
IAIIA·U
IA+C
IBIIA·U
IB+C
ICIIA·U
IC) (2)
From (2) formula, imbalance, the line length of static induced current and electric pressure, circuit capacitive coupling all have relation, irrelevant with circuit through-put power.
As shown in Figure 2, when maintenance circuit one side earthed switch is in off-state, opposite side earthed switch is in "on" position, and the voltage that line-to-ground switch disconnects side is mainly electromagnetic induction voltage, can obtain:
U
MIIA＝jωl(M
IAIIA·I
IA+M
IBIIA·I
IB+M
ICIIA·I
IC) (3)
From (3) formula, electromagnetic induction voltage and circuit through-put power, the imbalance of circuit Coupling Between Phases inductance, line length all have relation, irrelevant with electric pressure.
In the time overhauling circuit both sides earthed switch all in closure state, the electric current that flows through circuit is mainly em induced current, can obtain:
From (4) formula, em induced current only has relation with the imbalance of circuit through-put power and circuit Coupling Between Phases inductance, irrelevant with electric pressure and line length.
In order to ensure maintainer's safety, while maintenance for common-tower double-return circuit, the grounding switch of the maintenance circuit both sides of must first closing also hangs up earth connection; Maintenance finishes, and while turning normal operating mode, needs again first to disconnect maintenance circuit both sides grounding switch, then carries out grid switching operation power transmission.In whole process, circuit both sides grounding switch need to first drop into backed off after random, the current/voltage that needs during this time folding to come to maintenance line influence from working line.
Due to this body structure of grounding switch, its ability of cutting off current/voltage is very weak.Coupling between common-tower double-return circuit has caused very large test to the excision ability of grounding switch, especially along with expanding economy, and the appearance on large capacity, long distance, compact common-tower double-return road, more harsh to the performance requirement of grounding switch.
At present according to the requirement of national standard and relevant enterprise standard, for meeting the requirement of cutting off different induced current voltages, grounding switch is divided into category-A, category-B, super category-B, wherein A, category-B belong to conventional products, super category-B belongs to specific customization product, decided through consultation by manufacturer and user, be specifically designed to the induced current voltage that cut-out is larger, need that special design, cost is higher, O&M is complicated.
In addition, also find in practice, originally both sides configure the common-tower double-return circuit of conventional grounding switch, along with load growth, circuit reconfiguration, operational mode, there will be common-tower double-return line influence current/voltage to exceed standard, cause the grounding switch of both sides cannot meet the requirement of new line attachment cut-out induced current voltage, now need grounding switch integral replacing in the transformer station to having built up.The equipment replacement that builds transformer station is limited by the many factors restrictions such as site area, apparatus-form, power cut construction scheme, realizes and being difficult for, and not yet due i.e. replacing equipment life, has also caused very large waste economically simultaneously.
Summary of the invention
In order to address the above problem, the invention provides the inhibition system and method for induced current voltage between a kind of common-tower double-return circuit, it is simple that it suppresses system configuration, induced current and voltage can effectively suppress to overhaul time between common-tower double-return circuit.
The present invention solves the technical scheme that its technical problem takes: the inhibition system of induced current voltage between a kind of common-tower double-return circuit, comprise the transformer station and the grounding switch control system thereof that are connected with circuit I and circuit II respectively, it is characterized in that: also comprise impedance and contactor, described transformer station comprises the first transformer station and the second transformer station, the first described transformer station is connected with earth mat with the grounding switch of the second transformer station, between the grounding switch of described the first transformer station and earth mat, connect an impedance is set, the described impedance contactor that is connected in parallel respectively.
Further, described grounding switch control system comprises very first time relay and second time relay, the contact of described very first time relay and second time relay is separately positioned in the contactor control loop of primary circuit of grounding switch control system, and coil is arranged in secondary circuit.
Further, the contact of the coil of described contactor and very first time relay and second time relay is connected in series, and the contact of contact and very first time relay is connected in parallel.
Further, described contactor adopts the contactor that model is JCZ5-7.2/400.
The present invention also provides the inhibition method of induced current voltage between a kind of common-tower double-return circuit, in the time of common-tower double-return line maintenance, suppresses induced current and the voltage between common-tower double-return circuit by inhibition system, it is characterized in that:
Described inhibition system comprises the transformer station and the grounding switch control system thereof that are connected with circuit I and circuit II respectively, described transformer station comprises the first transformer station and the second transformer station, the first described transformer station is connected with earth mat with the grounding switch of the second transformer station, between the grounding switch of described the first transformer station and earth mat, connect an impedance is set, the described impedance contactor that is connected in parallel respectively, described grounding switch control system comprises very first time relay and second time relay, the contact of described very first time relay and second time relay is separately positioned in the contactor control loop of primary circuit of grounding switch control system, coil is arranged in secondary circuit,
Said method comprising the steps of:
Between the grounding switch of the first transformer station and earth mat, be connected in series respectively an impedance, and each impedance contactor that is connected in parallel respectively, described contactor is gone out gate-dividing state;
First the grounding switch of the second transformer station that closes before maintenance, then at the grounding switch of the first transformer station that closes, now the grounding switch of the first transformer station is connected with earth mat by serial connection impedance;
The contactor that closes, by impedance short circuit, carries out line maintenance;
After having overhauled, first disconnect contactor, impedance is connected between the grounding switch and earth mat of the first transformer station, then disconnect successively the grounding switch of the first transformer station and the grounding switch of the second transformer station.
In said method, the contact of the coil of described contactor and very first time relay and second time relay is connected in series, and the contact of contact and very first time relay is connected in parallel.
In said method, described contactor adopts the contactor that model is JCZ5-7.2/400.
The invention has the beneficial effects as follows: the present invention is by adopting the parallel system of series impedance-contactor between the grounding switch of transformer station and earth mat to realize the object that not only suppresses induced current but also do not increase line voltage distribution, the complexity of operation while maintenance for reducing, operation circuit for original grounding switch is optimized design, realize to the automatic control of impedance parallel contactor switching.Additional this inhibition system of conventional grounding switch can effectively reduce em induced current, meets the needs of the large capacity of folding, long distance, compact same tower double back transmission line, has reduced equipment manufacturing cost; In the time of built transformer station em induced current voltage over standard, also provide a kind of solution that does not need to change grounding switch.
Brief description of the drawings
By reading the detailed description that non-limiting example is done of doing with reference to the following drawings, it is more obvious that other features, objects and advantages of the present invention will become:
Fig. 1 is electrostatic coupling schematic diagram between common-tower double-return circuit;
Fig. 2 is electromagnetic coupled schematic diagram between common-tower double-return circuit;
Fig. 3 is the equipment connection structure schematic diagram that the present invention suppresses system;
Fig. 4 is the primary circuit circuit diagram of inhibition system of the present invention;
Fig. 5 is the secondary circuit circuit diagram of inhibition system of the present invention;
Fig. 6 is the structural representation that grounding switch is only connected in series impedance;
Fig. 7 be grounding switch while being only connected in series impedance 500kV line electricity induced field current with the simulation curve figure of resistance variations;
Fig. 8 be grounding switch while being only connected in series impedance 500kV line resistance terminal voltage with the simulation curve figure of resistance variations.
Embodiment
Disclosing below provides many different embodiment or example to be used for realizing different structure of the present invention.Of the present invention open in order to simplify, hereinafter the parts to specific examples and setting are described.In addition, the present invention can be in different examples repeat reference numerals and/or letter.This repetition is in order to simplify and object clearly, itself do not indicate the relation between discussed various embodiment and/or setting.It should be noted that illustrated parts are not necessarily drawn in proportion in the accompanying drawings.The present invention has omitted the description of known assemblies and treatment technology and technique to avoid unnecessarily limiting the present invention.
As shown in Fig. 3, Fig. 4 and Fig. 5, the inhibition system of induced current voltage between a kind of common-tower double-return circuit of the present invention, comprise and be connected respectively transformer station and grounding switch control system thereof with circuit I and circuit II, also comprise impedance and contactor, described transformer station comprises the first transformer station and the second transformer station, the first described transformer station is connected with earth mat with the grounding switch of the second transformer station, between the grounding switch of described the first transformer station and earth mat, connect an impedance is set, the described impedance contactor that is connected in parallel respectively; Described grounding switch control system comprises very first time relay and second time relay, the contact of described very first time relay and second time relay is separately positioned in the contactor control loop of primary circuit of grounding switch control system, and coil is arranged in secondary circuit; The contact of the coil of described contactor and very first time relay and second time relay is connected in series, and the contact of contact and very first time relay is connected in parallel.Described contactor adopts the contactor that model is JCZ5-7.2/400.
The present invention also provides the inhibition method of induced current voltage between a kind of common-tower double-return circuit, in the time of common-tower double-return line maintenance, suppresses induced current and the voltage between common-tower double-return circuit by inhibition system, said method comprising the steps of:
1) between the grounding switch of the first transformer station and earth mat, be connected in series respectively an impedance, and each impedance contactor that is connected in parallel respectively, described contactor is gone out gate-dividing state;
2) first close before the maintenance grounding switch of the second transformer station, then at the grounding switch of the first transformer station that closes, now the grounding switch of the first transformer station is connected with earth mat by serial connection impedance;
3) contactor that closes, by impedance short circuit, carries out line maintenance;
4) after having overhauled, first disconnect contactor, impedance is connected between the grounding switch and earth mat of the first transformer station, then disconnect successively the grounding switch of the first transformer station and the grounding switch of the second transformer station.
Operation principle of the present invention is as follows.
Theoretical calculation and actual measurement all proves that coupling capacitance, coupling inductance between common-tower double-return circuit are all very little, capacitance in microfarad magnitude, coupling inductance in milihenry magnitude.Analysis mode (2) and formula (3) are visible, because coupling capacitance, coupling inductance are very little, therefore static induced current, electromagnetic induction voltage are very little, in the research of induced current voltage in secondary cause.Analysis mode (1) and formula (4) are visible, although coupling capacitance, coupling inductance are lower compared with circuit selfcapacity, inductance, but both are divided by, still there is certain ratio, therefore electrostatic induction voltage, em induced current are relatively large.Further analyze, because the voltage of system is often controlled at a stable numerical value, thereby for a certain electric pressure circuit, electrostatic induction voltage is subject to changes of operating modes little, in general be predictable, and take according to measured result after the measures such as wire transposition, can be by electrostatic induction limiting voltage at suitable numerical value.But from formula (4), em induced current size is very large, linear in the current affects on transport line road; And the variation of the variation of the change of operational mode, trend, access way all can impact working line electric current in electric power system, em induced current is changed.In general, need to calculate according to wire limit transmission current on transport line road the em induced current of stoppage in transit circuit, by this Standard Selection grounding switch, can guarantee that grounding switch can reliably working in the time of folding and be not damaged.
According to when the fortune limit transmission current verification stoppage in transit line electricity induced field current, generally there will be electrostatic induction voltage, static induced current, three parameter values of electromagnetic induction voltage all not high, in the scope requiring at conventional A, category-B grounding switch; Em induced current numerical value is larger, has exceeded conventional A, the requirement of category-B grounding switch.
Consider that coupling inductance is very low, the present invention, by be connected in series impedance between grounding switch and earth mat, effectively increases the resistance value in em induced current loop, plays the object that suppresses em induced current.
As shown in Figure 6, establishing the em induced current on circuit after serial connection impedance is I'
m II A, end is because the voltage that static induced current causes is upgraded to U'
s II A.
When after grounding switch QE1 serial connection impedance Z, the em induced current that flows through circuit is inhibited:
From (5) formula, when in the situation that transmission capacity and line parameter circuit value do not change, serial connection impedance has been equivalent to increase the self-induction of circuit, thus the em induced current dwindling.
But, will on additional impedance, produce voltage because induced current flows through additional impedance, thereby raise the current potential of dead line, the circuit potential rise that causes power failure is:
According to typical 500kV common-tower double-return track data, in grounding switch loop, be connected in series respectively different resistance, show that induced current voltage (each mutually in maximum) is with the curve of resistance variations as shown in Figure 7 and Figure 8:
From Fig. 7 and Fig. 8, after series resistor, em induced current, along with the increase of series resistor sharply reduces, also can cause in series resistor end higher potential rise, thereby raise the current potential of dead line simultaneously, may damage maintainer.Further analyze as seen, the potential rise of series resistor end increases with resistance, but not higher than not electromagnetic induction voltage when series resistor of circuit.For solving the impact of this voltage, as shown in Figure 3, inhibition system of the present invention is made up of impedance Z and the contactor KM in parallel with impedance Z.
In the time of circuit II interruption maintenance, the grounding switch QE2 of second B of transformer station that first closes, the grounding switch QE1 of first A of transformer station that then closes, by impedance Z connecting system, plays the effect of the em induced current while suppressing grounding switch QE1 combined floodgate; After grounding switch QE1 closes a floodgate, the contactor KM that closes by impedance Z short circuit, suppresses the potential rise on maintenance circuit simultaneously.
In the time that circuit II exits maintenance, first disconnect contactor KM, by impedance Z connecting system, the larger em induced current while suppressing grounding switch QE1 separating brake; Then order disconnects grounding switch QE1 and grounding switch QE2 grounding switch, and maintenance circuit is exited.
For typical 220-500kV bundle conductor, line self-inductance L ≈ 1.7 × 10
-3h/km, numerical value is less.From formula (5), em induced current size substantially with the inversely proportional relation of series resistor resistance.If
when k=2 is Z
ad2when=L, static induced current will be reduced to original 50%.According to the line self-inductance value above improving, corresponding series resistor Z=0.5338l.220kV circuit series resistor for 40km is approximately 22 Ω; 500kV circuit series resistor for 100km is approximately 53 Ω.
According to the simulation curve shown in Fig. 7 and Fig. 8, in the time that series resistor is respectively 20 Ω, 50 Ω, corresponding em induced current reduces half substantially as seen, and simulation result is consistent with theory analysis.
In the time that maintenance circuit grounding switch closes, parallel contactor is by series resistor short circuit subsequently.Now, the electric current that flows through contactor is whole em induced currents.Before maintenance circuit earthed switch disconnects, need to first disconnect parallel contactor, so parallel contactor need possess the ability of cut-offfing whole em induced currents.When contactor disconnects, need to bear the voltage on series resistor, can not exceed the electromagnetic induction voltage of circuit according to this voltage of analysis above.
The em induced current of considering general circuit is all no more than 300A, and 220-500kV circuit electromagnetic induction voltage is generally not more than 6.3kV, can select the contactor of JCZ5-7.2/400 model.The rated operational voltage of this model contactor is 7.2kV, and rated operational current is 400A, and making current can reach 4kA, and drop-out current can reach 3.2kA.
As shown in Figure 4 and Figure 5, for reducing the complexity of operation, the control loop of grounding switch is optimized to design, in Fig. 4 and Fig. 5, T1, T2 are the time relay, and KM1, KM2 are grounding switch QE control loop, and KM3 is the control loop of contactor KM.By increase the time relay in original grounding switch control loop, can automatically realize after the grounding switch that closes and automatically drop into contactor, automatically first disconnect contactor before disconnecting grounding switch, simplify operating process.
The above is the preferred embodiment of the present invention, for those skilled in the art, under the premise without departing from the principles of the invention, can also make some improvements and modifications, and these improvements and modifications are also regarded as protection scope of the present invention.
Claims (7)
1. the inhibition system of induced current voltage between a common-tower double-return circuit, comprise the transformer station and the grounding switch control system thereof that are connected with circuit I and circuit II respectively, it is characterized in that: also comprise impedance and contactor, described transformer station comprises the first transformer station and the second transformer station, the first described transformer station is connected with earth mat with the grounding switch of the second transformer station, between the grounding switch of described the first transformer station and earth mat, connect an impedance is set, the described impedance contactor that is connected in parallel respectively.
2. the inhibition system of induced current voltage between a kind of common-tower double-return circuit according to claim 1, it is characterized in that: described grounding switch control system comprises very first time relay and second time relay, the contact of described very first time relay and second time relay is separately positioned in the contactor control loop of primary circuit of grounding switch control system, and coil is arranged in secondary circuit.
3. the inhibition system of induced current voltage between a kind of common-tower double-return circuit according to claim 2, it is characterized in that: the contact of the coil of described contactor and very first time relay and second time relay is connected in series, the contact of contact and very first time relay is connected in parallel.
4. according to the inhibition system of induced current voltage between a kind of common-tower double-return circuit described in claims 1 to 3 any one, it is characterized in that: described contactor adopts the contactor that model is JCZ5-7.2/400.
5. an inhibition method for induced current voltage between common-tower double-return circuit suppresses induced current and the voltage between common-tower double-return circuit by inhibition system in the time of common-tower double-return line maintenance, it is characterized in that:
Described inhibition system comprises the transformer station and the grounding switch control system thereof that are connected with circuit I and circuit II respectively, described transformer station comprises the first transformer station and the second transformer station, the first described transformer station is connected with earth mat with the grounding switch of the second transformer station, between the grounding switch of described the first transformer station and earth mat, connect an impedance is set, the described impedance contactor that is connected in parallel respectively, described grounding switch control system comprises very first time relay and second time relay, the contact of described very first time relay and second time relay is separately positioned in the contactor control loop of primary circuit of grounding switch control system, coil is arranged in secondary circuit,
Said method comprising the steps of:
Between the grounding switch of the first transformer station and earth mat, be connected in series respectively an impedance, and each impedance contactor that is connected in parallel respectively, described contactor is gone out gate-dividing state;
First the grounding switch of the second transformer station that closes before maintenance, then at the grounding switch of the first transformer station that closes, now the grounding switch of the first transformer station is connected with earth mat by serial connection impedance;
The contactor that closes, by impedance short circuit, carries out line maintenance;
After having overhauled, first disconnect contactor, impedance is connected between the grounding switch and earth mat of the first transformer station, then disconnect successively the grounding switch of the first transformer station and the grounding switch of the second transformer station.
6. the inhibition method of induced current voltage between a kind of common-tower double-return circuit according to claim 5, it is characterized in that: the contact of the coil of described contactor and very first time relay and second time relay is connected in series, the contact of contact and very first time relay is connected in parallel.
7. according to the inhibition method of induced current voltage between a kind of common-tower double-return circuit described in claim 5 or 6, it is characterized in that: described contactor adopts the contactor that model is JCZ5-7.2/400.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106680605A (en) * | 2015-11-05 | 2017-05-17 | 国网辽宁省电力有限公司本溪供电公司 | Method of eliminating induced electricity in test line parameters |
| CN107508308A (en) * | 2017-09-29 | 2017-12-22 | 南方电网科学研究院有限责任公司 | Earthing or grounding means and DC transmission system in a kind of current conversion station |
| CN107508309A (en) * | 2017-09-29 | 2017-12-22 | 南方电网科学研究院有限责任公司 | Earthing or grounding means and DC transmission system in a kind of current conversion station |
| CN107508310A (en) * | 2017-09-29 | 2017-12-22 | 南方电网科学研究院有限责任公司 | Earthing or grounding means and DC transmission system in a kind of current conversion station |
| CN108181500A (en) * | 2017-12-28 | 2018-06-19 | 中国南方电网有限责任公司超高压输电公司南宁局 | A kind of power transmission and transforming equipment closes a floodgate determines method without pressure definite value |
| CN110297161A (en) * | 2019-06-21 | 2019-10-01 | 国网河北省电力有限公司 | Take precautions against the method and scheduling system of with ground power transmission of grid equipment |
| CN110568243A (en) * | 2019-09-25 | 2019-12-13 | 国网上海市电力公司 | method for measuring induced voltage and current of same-tower four-loop line |
| CN113572138A (en) * | 2021-07-09 | 2021-10-29 | 广东云舜综合能源科技有限公司 | Method and device for setting electric knife switch with double confirmation functions |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202374033U (en) * | 2011-11-17 | 2012-08-08 | 玉锋实业集团有限公司 | Automatic switching device for standby power supply |
| CN103078313A (en) * | 2012-11-14 | 2013-05-01 | 陕西省电力公司规划评审中心 | Method for inhibiting induction voltage and current of 750kV parallel single-line construction line |
| CN203850835U (en) * | 2014-05-29 | 2014-09-24 | 国家电网公司 | System for suppressing induced current and voltage between common-tower double-circuit lines |
-
2014
- 2014-05-29 CN CN201410234572.6A patent/CN103986163B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202374033U (en) * | 2011-11-17 | 2012-08-08 | 玉锋实业集团有限公司 | Automatic switching device for standby power supply |
| CN103078313A (en) * | 2012-11-14 | 2013-05-01 | 陕西省电力公司规划评审中心 | Method for inhibiting induction voltage and current of 750kV parallel single-line construction line |
| CN203850835U (en) * | 2014-05-29 | 2014-09-24 | 国家电网公司 | System for suppressing induced current and voltage between common-tower double-circuit lines |
Non-Patent Citations (3)
| Title |
|---|
| 欧小波等: "750kV同塔双回输电线路中感应电压、感应电流的研究以及接地开关的选取", 《陕西电力》 * |
| 程风华等: "同塔双回B类高压交流接地开关辅助回路的设计", 《高压电器》 * |
| 董显等: "开合感应电流B类接地开关在葛洲坝电站的应用", 《高压电器》 * |
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