CN106711969A - Pilot protection method for double ultrahigh voltage direct current transmission line based on modulus saltation - Google Patents
Pilot protection method for double ultrahigh voltage direct current transmission line based on modulus saltation Download PDFInfo
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- CN106711969A CN106711969A CN201710032008.XA CN201710032008A CN106711969A CN 106711969 A CN106711969 A CN 106711969A CN 201710032008 A CN201710032008 A CN 201710032008A CN 106711969 A CN106711969 A CN 106711969A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/268—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured for dc systems
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- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Locating Faults (AREA)
Abstract
The invention discloses a pilot protection method for a double ultrahigh voltage direct current transmission line based on modulus saltation. The method comprises the following steps: performing digital sampling and phase mold uncoupling on the two sides of the line, thereby acquiring currents of molds 1 and molds 0 on the two sides of the line; judging the fault type according to a saltation direction of the mold current; if at most only one side of the currents of the molds 1 or molds 0 on the two sides is subjected to positive saltation, confirming as an external fault; if the currents of the molds 1 and molds 0 on the two sides are all subjected to positive saltation, confirming as an internal anode grounding fault; if the currents of the molds 1 on the two sides are both subjected to positive saltation and the currents of the molds 0 on the two sides are both subjected to negative saltation, confirming as an internal cathode grounding fault; and if the currents of the molds 1 on the two sides are both subjected to positive saltation and the currents of the molds 0 on the two sides are both free from saltation, confirming as an internal inter-polar short circuit fault. According to the invention, only the mold current jump value is adopted, the fault feature is obvious, the capacity of enduring transition resistance is high, and the reliability is high; the type of the internal fault can be directly recognized, the fault pole selection is performed, and the adaptability is high; and the sampling rate required by the method is low, and the method is easily realized.
Description
Technical field
The present invention relates to power system direct current transportation relay protection field, more particularly to ultra-high/extra-high voltage DC power transmission line
Electric current pilot protection.
Background technology
HVDC (HVDC) transmission of electricity has transimission power big, circuit low cost, the features such as control mode is flexible, in long distance
Taken advantage from aspects such as large capacity transmission, the asynchronous interconnections of AC system, be the important component of modern power network.China's energy
Resource is in contrary distribution with productivity, and large-scale power supply base, away from load center, is in receiving end electric power city by part quality power
Field optimizes configuration, and strengthens the interconnection between power network, and DC transmission engineering has broad application prospects in China.Cause
This, improves the safety and reliability of DC power transmission line operation, it has also become problem in the urgent need to address.
Current DC line protection mainly has traveling-wave protection, under-voltage protection and longitudinal differential protection.At present in operation
DC line it is many using traveling-wave protection as main protection, traveling-wave protection quick action is not divided by earth resistance, load, line long
The influence of the factors such as cloth electric capacity, is widely used in direct current transportation.However, the traveling wave for being put into operation both at home and abroad at present is protected
Shield generally existing reliability problem not high, easy malfunction.The resistance to transition resistance ability of under-voltage protection is low, longitudinal differential protection dynamic formula
Postpone length, reliability is not high, easily loses action chance.Analysis according to statistics, current power transmission line fault is still to cause
The main cause that DC transmission system is stopped transport.Direct current transmission line fault probability is high, but existing protection philosophy is incomplete, therefore
It is necessary to be lifted the performance of existing DC line protection, is that the reliable and stable operation of modern power network escorts.
The content of the invention
It is an object of the invention to provide a kind of quick action, reliability is high, and resistance to transition resistance ability is strong, is not struck by lightning
Influence, it is easy to accomplish, monopolar grounding fault and intereelectrode short-circuit failure can be distinguished, and monopolar grounding fault can be carried out and select pole
Jump-value of current longitudinal protection method.
To achieve these goals, the present invention is adopted the following technical scheme that：
Based on the bipolar HVDC method for pilot protection of circuit of modulus mutation, implementation method is comprised the following steps：
Step one：Sampling is synchronized with predetermined sampling rate to DC current at bipolar direct current transmission line two ends, and
The transient DC electric current at both positive and negative polarity circuit two ends is obtained by digital-to-analogue conversion；
Step 2：The both positive and negative polarity circuit two ends transient DC Current Decoupling for being obtained sampling using decoupling matrices is circuit two
The line mould (1 mould) and topotype (0 mould) transient state mould electric current at end；
Step 3：The transient state mould electric current obtained using step 2, respectively calculate failure after the time [T1, T2] interior circuit two ends
The jump-value of current of 1 mould, 0 mould electric current, and by the jump-value of current of the mould of circuit two ends 1 and 0 mould and the threshold I that adjustssetContrast, sentences
Disconnected mutation direction.If jump-value of current is more than Iset, then it is forward mutation assay, if jump-value of current is less than-Iset, then for negative sense is prominent
Become, be otherwise without mutation.
Step 4：The two ends mould jump-value of current direction obtained using judgement, carries out Fault Identification：
It is external area error if the mould of circuit two ends 1 or 0 mould jump-value of current direction at most only 1 side are forward direction；
If the mould of circuit two ends 1 and 0 mould jump-value of current direction are forward direction, plus earth failure in Ze Wei areas；
If the mould jump-value of current direction of circuit two ends 1 is forward direction, and the mould jump-value of current direction of circuit two ends 0 be it is negative
To negative pole earth fault in Ze Wei areas；
If the mould jump-value of current direction of circuit two ends 1 is forward direction, and the mould jump-value of current of circuit two ends 0 without mutation,
Intereelectrode short-circuit failure in Ze Wei areas.
Transient DC electric current in the step one, is acquired by the current divider at DC line two ends.
Predetermined sampling rate in the step one is not less than 1Hz.
Decoupling matrices in the step 2 are following form：
In formula, a is modulus amplitude coefficient.
Time [T1, T2] after failure in the step 3, to eliminate thunderbolt influence for target is determined, and according to straight
The regulator parameter for flowing transmission system finally determines.
Mould jump-value of current in the step 3 is fault transient mould electric current with failure before normal operation when mould electric current
Difference.
The threshold I that adjusts in the step 3set, the steady state run current I according to DC transmission systemnAnd decoupling matrices
Modulus amplitude coefficient a be determined as the following formula：
Iset=NTkraksIn
N in formulaTThe sampled point number for being [T1, T2] in the time；krIt is coefficient of reliability, ksFor failure steady-state current is mutated
Coefficient of discharge, two coefficients are determined all in accordance with the parameter of DC transmission system.
Mutation direction in the step 3, the directional element for protecting installation place by circuit two ends is judged.
Fault Identification in the step 4, is carried out as follows：
(1) after the completion of the directional element of DC line side judges, the open certain time interval T of protectiond, circuit is waited to side
To the result of determination of element, TdComprehensively determined by the passing time of DC line communication port and the judgement time of directional element,
It is 10ms~20ms to select；
(2) after the result of determination of circuit offside directional element is delivered to this side, by sentencing for the directional element of this side and offside
Determine result and be delivered to this side protection device；
(3) fault recognition method in step 4, sentencing for fault type is carried out by the logical operation in protection device
It is disconnected.
Compared with prior art, the present invention mainly has advantages below：
1), merely with jump-value of current, without using voltage, resistance to transition resistance ability is strong for the present invention；
2) substantially, reliability is high for the transient process fault signature that the present invention is utilized；
3) present invention can distinguish monopolar grounding fault and intereelectrode short-circuit failure in area without assistant criteria, and can
Realize that monopolar grounding fault selects pole, compared to existing DC line protection and the DC line protection new principle for proposing in recent years,
Adaptability is stronger；
4) present invention only requires the result of determination using communication port direction of transfer element, without the sampling of two ends electrical quantity
It is synchronous, do not influenceed by not inconsistent the mutation with time delay of communication port time delay；
5) sample rate needed for the present invention is low, it is easy to which hardware is realized.
Brief description of the drawings
Fig. 1 is straight bipolar flow transmission system schematic diagram；
Fig. 2 is introduced the flow chart of method by the realization present invention；
Metallic earthing fault simulation figure at rectification side dc bus f1 outside Tu3Wei areas, Fig. 3 (a) is 1 mould Sudden Changing Rate, Fig. 3
B () is 0 mould Sudden Changing Rate；
Single-phase high-impedance analogous diagram at inverter side ac bus f2 outside Tu4Wei areas, Fig. 4 (a) is 1 mould Sudden Changing Rate,
Fig. 4 (b) is 0 mould Sudden Changing Rate；
Positive pole high resistance earthing fault at f3 in Tu5Wei areas, Fig. 5 (a) is 1 mould Sudden Changing Rate, and Fig. 5 (b) is 0 mould Sudden Changing Rate；
Negative pole high resistance earthing fault at f4 in Tu6Wei areas, Fig. 6 (a) is 1 mould Sudden Changing Rate, and Fig. 6 (b) is 0 mould Sudden Changing Rate；
Intereelectrode short-circuit failure at f5 in Tu7Wei areas, Fig. 7 (a) is 1 mould Sudden Changing Rate, and Fig. 7 (b) is 0 mould Sudden Changing Rate.
Specific embodiment
The present invention will be described in further detail below in conjunction with the accompanying drawings.
First, decoupling matrices are determined according to modulus amplitude coefficient.If the total value of the mould electric current and electrode current from after decoupling
Constant, then modulus amplitude coefficient takesShown in decoupling matrices such as formula (1)：
Refer to shown in Fig. 1, DC power transmission line is located between converting plant and Inverter Station, direct current current divider is located at flat ripple electricity
Anti- device outside.iMp、iMnThe positive and negative electrode electric current that respectively sampling of DC line M sides is obtained, iNp、iNnRespectively DC line N sides
The positive and negative electrode electric current that measurement apparatus sampling is obtained.Sample frequency is not less than 1Hz.
The flow chart shown in Fig. 2 is referred to, after protection starts, the electrode current that sampling is obtained is entered according to decoupling matrices (1)
The decoupling of row phase mould obtains the mould of circuit two ends 1, the DC current of 0 mould：
In formula, iM1、iM0Respectively DC line M sides 1 when mould, 0 mould DC current, iN1、iN0Respectively DC line N
1 mould of side, 0 mould DC current.
[T1, T2] calculates DC line M sides, 1 mould of N sides, 0 mould DC current Sudden Changing Rate respectively in the time after a failure.
T1 should determine that the failure that T2 is considered as escaping after the regulation of DC transmission system adjuster terminates is steady according to the influence for escaping thunderbolt
State process.This example only proposes a kind of Choice, and any Choice according to mentioned above principle is in the protection model of this patent
Within enclosing.For typical DC transmission engineering, the time of controller action is usually no more than 30ms, then [T1, T2] can take
[3ms,30ms].From data window is reduced, improve from the point of view of responsiveness, can choose [3ms, 10ms].
DC line M sides, the mould jump-value of current of N sides are calculated according to formula (3)：
In formula, k is sampling piont mark；J is modulus label, takes 1 or 0；ijkIt is circuit side under k-th sampled point after failure
Mould electric current；ijsIt is the mould electric current of the circuit side under straight-flow system steady-state operation；ΔijkFor under k-th sampled point after failure
The mould jump-value of current of DC line side.
The action threshold I of sudden-change direction element is determined according to formula (4)set, it is considered to the total value of mould electric current and electrode current is not
Become：
In formula, j is modulus label, takes 1 or 0；krIt is coefficient of reliability, takes 1.2~1.5；ksFor failure steady-state current is mutated
Coefficient of discharge, the failure stable state mould electric current according to DC transmission system determines with the difference of mould electric current when normally running, it is considered to one
Fixed nargin, can typically take 0.03；InIt is the steady state run current of DC transmission system.
Threshold formula (4) is acted according to mould jump-value of current formula (3) and directional element, the protection in DC line both sides is installed
1 mould, 0 mould jump-value of current travel direction differentiation of place's utilization orientation element to circuit both sides.IfThen mould is electric
Stream Sudden Changing Rate is judged to forward direction, ifThen mould jump-value of current is judged to negative sense, is otherwise without mutation.
After this side directional element judges to terminate, protection locking regular hour Td, wait sentencing for circuit offside directional element
Determine after result is transferred to this side, and the discriminating direction result of this side and offside is transferred at this side protection device.Locking time
TdComprehensively determined by the passing time of DC line communication port and the judgement time of directional element, can typically take 10~
20ms。
After the result of determination of this side and countermeasure directional element is transferred to protection device, using patrolling for this side protection device
Collecting computing carries out the judgement of fault type.In principle, 1 mould of the invention or 0 mould current break direction can recognize external area error,
Using monopolar grounding fault and intereelectrode short-circuit failure in the relation recognition area in 1 mould and 0 mould current break direction, and carry out monopole and connect
Earth fault selects pole.This example recognizes external area error using 1 mould jump-value of current, and logic is as follows：
It is external area error if the mould jump-value of current direction of circuit two ends 1 at most only 1 side is forward direction；
If the mould jump-value of current direction of circuit two ends 1 is forward direction, continued to judge in area according to 0 mould current break direction
The type of failure：
If the mould jump-value of current direction of circuit two ends 0 is forward direction, plus earth failure in Ze Wei areas；If circuit two ends 0
Mould jump-value of current direction is negative sense, negative pole earth fault in Ze Wei areas；Otherwise it is intereelectrode short-circuit failure in area.Protection according to
Corresponding fault type action.
Refer to outside Tu3Wei areas metallic earthing fault simulation figure, inverter side outside Tu4Wei areas at rectification side dc bus f1
Single-phase high-impedance analogous diagram at ac bus f2, positive pole high resistance earthing fault analogous diagram at f3 in Tu5Wei areas, Fig. 6 is
Negative pole high resistance earthing fault analogous diagram at f4 in area, intereelectrode short-circuit fault simulation figure at f5 in Tu7Wei areas.
It is external area error for Fig. 3, it can be seen that the mould jump-value of current of two ends 1 only has inverter side (n sides) greatly in Fig. 3 (a)
In Iset, thus only 1 side is forward direction；The mould jump-value of current of two ends 0 only has inverter side (n sides) more than I in Fig. 3 (b)set, thus
Only 1 side is forward direction.Fault Identification principle of the invention, it is external area error that can be appropriately determined, and protection device is failure to actuate.
It is external area error for Fig. 4, it can be seen that in Fig. 4 (a) and Fig. 4 (b), the mould of two ends 1,0 mould jump-value of current are situated between
In IsetWith-IsetBetween, thus be without mutation.Fault Identification principle of the invention, it is event outside area that can be appropriately determined
Barrier, protection device is failure to actuate.
It is plus earth failure in area for Fig. 5, it can be seen that the mould of two ends 1,0 mould jump-value of current are big in Fig. 5 (a)
In Iset, thus it is forward direction.Fault Identification principle of the invention, it is plus earth failure in area that can be appropriately determined, and is protected
Protection unit presses plus earth fault actions.
It is negative pole earth fault in area for Fig. 6, it can be seen that the mould jump-value of current of two ends 1 is all higher than in Fig. 6 (a)
Iset, thus it is forward direction；The mould jump-value of current of two ends 0 is respectively less than-I in Fig. 6 (b)set, thus it is negative sense.According to the present invention
Fault Identification principle, it is negative pole earth fault in area that can be appropriately determined, protection device press negative pole earth fault action.
It is intereelectrode short-circuit failure in area for Fig. 7, it can be seen that the mould jump-value of current of two ends 1 is all higher than in Fig. 7 (a)
Iset, thus it is forward direction；The mould jump-value of current of two ends 0 is between I in Fig. 7 (b)setWith-IsetBetween, thus be without mutation.
Fault Identification principle of the invention, it is intereelectrode short-circuit failure in area that can be appropriately determined, and protection device is by intereelectrode short-circuit event
Barrier is acted.
Claims (9)
1. it is a kind of based on modulus mutation bipolar HVDC method for pilot protection of circuit, it is characterised in that including following
Step：
Step one：Sampling is synchronized with predetermined sampling rate to DC current at bipolar direct current transmission line two ends, and is passed through
Digital-to-analogue conversion obtains the transient DC electric current at both positive and negative polarity circuit two ends；
Step 2：The both positive and negative polarity circuit two ends transient DC Current Decoupling for being obtained sampling using decoupling matrices is circuit two ends
Line mould (1 mould) and topotype (0 mould) transient state mould electric current；
Step 3：The transient state mould electric current obtained using step 2, respectively calculate failure after time [T1, T2] the interior mould of circuit two ends 1,
The jump-value of current of 0 mould electric current, and by the jump-value of current of the mould of circuit two ends 1 and 0 mould and the threshold I that adjustssetContrast, judges prominent
Change direction.If jump-value of current is more than Iset, then it is forward mutation assay, if jump-value of current is less than-Iset, then it is no for negative sense is mutated
It is then without mutation；
Step 4：The two ends mould jump-value of current direction obtained using judgement, carries out Fault Identification：
It is external area error if the mould of circuit two ends 1 or 0 mould jump-value of current direction at most only 1 side are forward direction；
If the mould of circuit two ends 1 and 0 mould jump-value of current direction are forward direction, plus earth failure in Ze Wei areas；
If the mould jump-value of current direction of circuit two ends 1 is forward direction, and the mould jump-value of current direction of circuit two ends 0 is negative sense,
Negative pole earth fault in Ze Wei areas；
If the mould jump-value of current direction of circuit two ends 1 is forward direction, and the mould jump-value of current of circuit two ends 0 is without mutation, then for
Intereelectrode short-circuit failure in area.
2. a kind of bipolar HVDC method for pilot protection of circuit based on modulus mutation as claimed in claim 1, its
It is characterised by：Transient DC electric current in the step one, is acquired by the current divider at DC line two ends.
3. a kind of bipolar HVDC method for pilot protection of circuit based on modulus mutation as claimed in claim 1, its
It is characterised by：Predetermined sampling rate in the step one is not less than 1Hz.
4. a kind of bipolar HVDC method for pilot protection of circuit based on modulus mutation as claimed in claim 1, its
It is characterised by：Decoupling matrices in the step 2 are following form：
In formula, a is modulus amplitude coefficient.
5. a kind of bipolar HVDC method for pilot protection of circuit based on modulus mutation as claimed in claim 1, its
It is characterised by：Time [T1, T2] after failure in the step 3, to eliminate thunderbolt influence for target is determined, and according to
The regulator parameter of DC transmission system finally determines that T1, T2 are respectively the moment after failure.
6. a kind of bipolar HVDC method for pilot protection of circuit based on modulus mutation as claimed in claim 1, its
It is characterised by：Mould jump-value of current in the step 3 is fault transient mould electric current with failure before normal operation when mould electric current
Difference.
7. a kind of bipolar HVDC method for pilot protection of circuit based on modulus mutation as claimed in claim 1, its
It is characterised by：The threshold I that adjusts in the step 3set, the steady state run current I according to DC transmission systemnAnd decoupling matrices
Modulus amplitude coefficient a be determined as the following formula：
Iset=NTkraksIn
N in formulaTThe sampled point number for being [T1, T2] in the time；krIt is coefficient of reliability, ksIt is failure steady-state current Sudden Changing Rate system
Number, two coefficients are determined all in accordance with the parameter of DC transmission system.
8. a kind of bipolar HVDC method for pilot protection of circuit based on modulus mutation as claimed in claim 1, its
It is characterised by：Mutation direction in the step 3, the directional element for protecting installation place by circuit two ends is judged.
9. a kind of bipolar HVDC method for pilot protection of circuit based on modulus mutation as claimed in claim 1, its
It is characterised by：Fault Identification in the step 4, is carried out as follows：
(1) after the completion of the directional element of DC line side judges, protection locking certain time interval Td, wait circuit offside direction unit
The result of determination of part, TdComprehensively determined by the passing time of DC line communication port and the judgement time of directional element, selection
It is 10ms~20ms；
(2) after the result of determination of circuit offside directional element is delivered to this side, by this side and the judgement knot of the directional element of offside
Fruit is delivered to this side protection device；
(3) fault recognition method in step 4, the judgement of fault type is carried out by the logical operation in protection device.
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| CN201710032008.XA CN106711969B (en) | 2017-01-17 | 2017-01-17 | Bipolar HVDC method for pilot protection of circuit based on modulus mutation |
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| CN201710032008.XA CN106711969B (en) | 2017-01-17 | 2017-01-17 | Bipolar HVDC method for pilot protection of circuit based on modulus mutation |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107093891A (en) * | 2017-06-27 | 2017-08-25 | 国家电网公司 | A kind of flexible transformer substation system DC line protection method and device |
| CN107390046A (en) * | 2017-06-19 | 2017-11-24 | 天津大学 | A kind of high voltage direct current transmission line fault type judgement method |
| CN108023339A (en) * | 2017-12-09 | 2018-05-11 | 天津大学 | The HVDC transmission line back-up protection method of feature based frequency current |
| CN108199356A (en) * | 2017-12-29 | 2018-06-22 | 西安交通大学 | DC power transmission line ultra- high speed protection method based on wavefront information |
| CN108808634A (en) * | 2018-04-10 | 2018-11-13 | 天津大学 | HVDC transmission line longitudinal protection method based on smoothing reactor voltage |
| CN108923398A (en) * | 2018-07-23 | 2018-11-30 | 国网浙江省电力有限公司电力科学研究院 | A kind of DC distribution network protection method based on voltage characteristic traveling wave Similar measure |
| CN109274079A (en) * | 2018-11-01 | 2019-01-25 | 华北电力大学（保定） | A kind of Non-unit protection method of the soft straight power network line of ring-type |
| CN109638796A (en) * | 2019-01-22 | 2019-04-16 | 天津大学 | A kind of long range HVDC transmission line differential protecting method |
| CN110320444A (en) * | 2019-07-04 | 2019-10-11 | 中国电力科学研究院有限公司 | A kind of method and system differentiating direct current transmission line fault direction |
| CN110441659A (en) * | 2019-09-02 | 2019-11-12 | 湖南大学 | A kind of fault distinguishing method of HVDC transmission line |
| CN110456200A (en) * | 2019-08-15 | 2019-11-15 | 西南交通大学 | A kind of HVDC transmission system converting plant internal fault external fault recognition methods |
| CN111398851A (en) * | 2020-03-30 | 2020-07-10 | 云南电网有限责任公司电力科学研究院 | MMC-HVDC direct current transmission line fault detection method |
| CN113589101A (en) * | 2021-07-30 | 2021-11-02 | 华北水利水电大学 | Fault location method and system suitable for direct-current power transmission system |
| CN114089105A (en) * | 2021-11-12 | 2022-02-25 | 西安交通大学 | Fault direction judging method and system based on voltages on two sides of line boundary |
| CN114204525A (en) * | 2021-11-10 | 2022-03-18 | 华中科技大学 | Pilot protection method for direct-current transmission line and application thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5737166A (en) * | 1995-04-07 | 1998-04-07 | Asea Brown Boveri Ab | Protective equipment in a bipolar HVDC station |
| CN102510050A (en) * | 2011-11-08 | 2012-06-20 | 西安交通大学 | Pilot protection method for direct current line current abrupt change of multi-terminal direct current transmission system |
-
2017
- 2017-01-17 CN CN201710032008.XA patent/CN106711969B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5737166A (en) * | 1995-04-07 | 1998-04-07 | Asea Brown Boveri Ab | Protective equipment in a bipolar HVDC station |
| CN102510050A (en) * | 2011-11-08 | 2012-06-20 | 西安交通大学 | Pilot protection method for direct current line current abrupt change of multi-terminal direct current transmission system |
Non-Patent Citations (2)
| Title |
|---|
| 于洋: ""高压直流输电线路暂态保护研究"", 《中国优秀硕士学位论文全文数据库》 * |
| 高淑萍等: ""高压直流输电线路电流差动保护新原理"", 《电力***自动化》 * |
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| CN107390046B (en) * | 2017-06-19 | 2019-08-30 | 天津大学 | A kind of high voltage direct current transmission line fault type judgement method |
| CN107390046A (en) * | 2017-06-19 | 2017-11-24 | 天津大学 | A kind of high voltage direct current transmission line fault type judgement method |
| CN107093891B (en) * | 2017-06-27 | 2018-09-04 | 国家电网公司 | A kind of flexibility transformer substation system DC line protection method and device |
| CN107093891A (en) * | 2017-06-27 | 2017-08-25 | 国家电网公司 | A kind of flexible transformer substation system DC line protection method and device |
| CN108023339A (en) * | 2017-12-09 | 2018-05-11 | 天津大学 | The HVDC transmission line back-up protection method of feature based frequency current |
| CN108199356A (en) * | 2017-12-29 | 2018-06-22 | 西安交通大学 | DC power transmission line ultra- high speed protection method based on wavefront information |
| CN108199356B (en) * | 2017-12-29 | 2020-11-10 | 西安交通大学 | Wave-front information-based DC transmission line ultra-high speed protection method |
| CN108808634A (en) * | 2018-04-10 | 2018-11-13 | 天津大学 | HVDC transmission line longitudinal protection method based on smoothing reactor voltage |
| CN108923398A (en) * | 2018-07-23 | 2018-11-30 | 国网浙江省电力有限公司电力科学研究院 | A kind of DC distribution network protection method based on voltage characteristic traveling wave Similar measure |
| CN109274079A (en) * | 2018-11-01 | 2019-01-25 | 华北电力大学（保定） | A kind of Non-unit protection method of the soft straight power network line of ring-type |
| CN109638796A (en) * | 2019-01-22 | 2019-04-16 | 天津大学 | A kind of long range HVDC transmission line differential protecting method |
| CN110320444A (en) * | 2019-07-04 | 2019-10-11 | 中国电力科学研究院有限公司 | A kind of method and system differentiating direct current transmission line fault direction |
| CN110456200A (en) * | 2019-08-15 | 2019-11-15 | 西南交通大学 | A kind of HVDC transmission system converting plant internal fault external fault recognition methods |
| CN110456200B (en) * | 2019-08-15 | 2020-08-07 | 西南交通大学 | Method for identifying internal and external faults of rectifying station area of high-voltage direct-current transmission system |
| CN110441659A (en) * | 2019-09-02 | 2019-11-12 | 湖南大学 | A kind of fault distinguishing method of HVDC transmission line |
| CN111398851A (en) * | 2020-03-30 | 2020-07-10 | 云南电网有限责任公司电力科学研究院 | MMC-HVDC direct current transmission line fault detection method |
| CN113589101A (en) * | 2021-07-30 | 2021-11-02 | 华北水利水电大学 | Fault location method and system suitable for direct-current power transmission system |
| CN114204525A (en) * | 2021-11-10 | 2022-03-18 | 华中科技大学 | Pilot protection method for direct-current transmission line and application thereof |
| CN114089105A (en) * | 2021-11-12 | 2022-02-25 | 西安交通大学 | Fault direction judging method and system based on voltages on two sides of line boundary |
| CN114089105B (en) * | 2021-11-12 | 2022-08-16 | 西安交通大学 | Fault direction judging method and system based on voltages on two sides of line boundary |
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