CN108963990A - Route small current grounding fault processing method hand in hand based on transient power direction - Google Patents
Route small current grounding fault processing method hand in hand based on transient power direction Download PDFInfo
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- CN108963990A CN108963990A CN201810707343.XA CN201810707343A CN108963990A CN 108963990 A CN108963990 A CN 108963990A CN 201810707343 A CN201810707343 A CN 201810707343A CN 108963990 A CN108963990 A CN 108963990A
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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
- H02H7/266—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 involving switching on a spare supply
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0061—Details of emergency protective circuit arrangements concerning transmission of signals
- H02H1/0084—Details of emergency protective circuit arrangements concerning transmission of signals by means of pilot wires or a telephone network; watching of these wires
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/006—Calibration or setting of parameters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/06—Details with automatic reconnection
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The present invention relates to small current grounding fault processing technology fields, and in particular to the route small current grounding fault processing method hand in hand based on transient power direction.The present invention handles small current grounding fault using the method in transient power direction and delay cooperation for route hand in hand, using transient power walking direction fault section, action delay is arranged to switch, it trips after the delay time for reaching setting to inductive switch in control fault section upstream or downstream, communication is not depended on, and the normal power supply that fault point upstream perfects section is not influenced, it avoids and perfects the risk that section route undergoes secondary power failure, improve troubleshooting efficiency.
Description
Technical field
The present invention relates to small current grounding fault processing technology fields, and in particular to handing in hand based on transient power direction
Route small current grounding fault processing method.
Background technique
In the feed line automatization system for handing in hand route using the cooperation of automatic circuit voltage-time type sectionaliser, distribution wire
Road power switch is used with the automatic circuit for being overlapped function twice, and first time reclosing delay time is longer (being typically 15s),
Second of reclosing delay time is shorter (being typically 5s), and block switch and interconnection switch then use voltage-time type sectionaliser.
When failure occurs, trip as the automatic circuit of power switch, subsequent sectionaliser separating brake, automatic circuit after being delayed due to decompression along the line
It is overlapped for the first time, the voltage-time type sectionaliser setting as block switch is in first set function, and be delayed X- after the electrification of side
Time limit automatic closing causes automatic circuit and sectionaliser the 2nd to take turns tripping when fault point is arrived in conjunction.And due to being connected with fault section
Sectionaliser maintain closing time to be less than the Y- time limit, and be latched in gate-dividing state.At the same time, it is connected with fault section
Downstream segment device be also latched in gate-dividing state by residual voltage Closing mechanism.After one section of delay, second of coincidence of automatic circuit is
Can restore faulty line source side perfects section power supply.It is arranged as the voltage-time type sectionaliser of interconnection switch second
Cover function, when breaking down, failure side decompression, by XLAutomatic closing after time limit restores the strong of faulty line non-electrical source
Whole district's section power supply.If interconnection switch two sides electrification time is less than YLTime limit, then the interconnection switch is not overlapped.In addition, all points
Section device is in X- time limit or XLNo switching on when interconnection switch two sides are charged is detected in time limit, to avoid power distribution network closed loop
Operation.Therefore using the technology of traditional automatic circuit and the cooperation of voltage-time type sectionaliser, power switch needs are weighed twice
It closes, fault point upstream perfects section and need to undergo to have a power failure twice.And when line fault, block switch cannot judge immediately, and want
By automatic circuit or the trip protection of breaker, after feeder line decompression, sectionaliser could judge, therefore breakdown judge low efficiency,
Perfect section experience to have a power failure twice, secondary injury easily is caused to power equipment.
Summary of the invention
To solve the above-mentioned problems, the present invention provides the route small current neutral grounding events hand in hand based on transient power direction
Hinder processing method, specific technical solution is as follows:
Based on transient power direction hand in hand route small current grounding fault processing method the following steps are included:
(1) node for defining close bus bar side is root node, remaining node is child node, for the root section of fault section
Point, fault point upstream perfect the root node of section, and transient zero-sequence current, transient zero-sequence voltage meet:
It is sound that section child node, trouble point downstream are perfected for the upstream that fault section child node, downstream are not broken down
All nodes of section, transient zero-sequence current, transient zero-sequence voltage meet:
Wherein, u0It (t) is fault point residual voltage；CbFor fault point upstream detection point to route between bus and own
Sound circuit direct-to-ground capacitance, ClFor the direct-to-ground capacitance of detected downstream point to line end；ib(t)、il(t) for fault point upstream, under
Swim the fault current of each test point；
(2) transient reactive power Q is definedkIt is characterized frequency range internal fault point residual voltage u0(t) derivative and fault point zero sequence
Electric current i0(t) corresponding mean power:
Then, fault section root node and fault point upstream perfect section root node Qk< 0 shows transient power by line flows
To bus；The upstream that fault section child node, downstream are not broken down perfects section child node and trouble point downstream perfects area
Duan Suoyou node has Qk> 0 shows that transient power flows to route by bus；
(3) delay time of setting switch: the switch time delay time is incremented by successively by the lateral source side of load, first switch
Delay time be set as t, the delay time of second switch is set as 2t, and so on；
(4) fault location is carried out, judge fault section and perfects section；
(5) control fault section source-side switches tripping, that is, meet Qk< 0 and the switch trip for reaching delay time；
(6) interconnection switch detects that side has voltage, side no-voltage to close a floodgate, and downstream sound circuit switches to spare
Power supply；
(7) standby electricity source is closed to after fault point, is controlled fault section standby electricity source switch trip, that is, is met Qk< 0
And reach the switch trip of delay time, so far, fault section isolation perfects section and restores to operate normally.
Preferably, the section that perfects is at least the presence of child node line identical with its root node transient power direction
Road section；The fault section is any child node track section contrary with its root node transient power.
Preferably, the carry out fault location judges fault section and to perfect section detailed process as follows:
(1) master control FTU sends fault-signal to its child node FTU, and transient power direction is reported master control by child node FTU
FTU, master control FTU compare section two sides transient power direction；
(2) if all child nodes are contrary with its root node transient power, it is determined as fault section；Otherwise, it is determined that
To perfect section；
(3) for least significant end test point: if its Qk< 0, then section is fault section downstream；Otherwise, it is determined that perfect area
Section.
The invention has the benefit that the present invention provides the route small current neutral groundings hand in hand based on transient power direction
Fault handling method uses the method processing small current neutral grounding event of transient power direction and delay cooperation for route hand in hand
Barrier is arranged action delay to switch, is controlled pair in fault section upstream or downstream using transient power walking direction fault section
Inductive switch trips after reaching the delay time set, does not depend on communication, and do not influence the normal confession that fault point upstream perfects section
Electricity avoids and perfects the risk that section route undergoes secondary power failure, improves troubleshooting efficiency.
Detailed description of the invention
Fig. 1 is the schematic diagram of the switch time delay time setting of route hand in hand in the present invention；
Fig. 2 is the circuit diagram of embodiment simulation system in the present invention.
Specific embodiment
In order to better understand the present invention, the present invention will be further explained below with reference to the attached drawings and specific examples:
Based on transient power direction hand in hand route small current grounding fault processing method the following steps are included:
(1) node for defining close bus bar side is root node, remaining node is child node, for the root section of fault section
Point, fault point upstream perfect the root node of section, and transient zero-sequence current, transient zero-sequence voltage meet:
It is sound that section child node, trouble point downstream are perfected for the upstream that fault section child node, downstream are not broken down
All nodes of section, transient zero-sequence current, transient zero-sequence voltage meet:
Wherein, u0It (t) is fault point residual voltage；CbFor fault point upstream detection point to route between bus and own
Sound circuit direct-to-ground capacitance, ClFor the direct-to-ground capacitance of detected downstream point to line end；ib(t)、il(t) for fault point upstream, under
Swim the fault current of each test point；
(2) transient reactive power Q is definedkIt is characterized frequency range internal fault point residual voltage u0(t) derivative and fault point zero sequence
Electric current i0(t) corresponding mean power:
Then, fault section root node and fault point upstream perfect section root node Qk< 0 shows transient power by line flows
To bus；The upstream that fault section child node, downstream are not broken down perfects section child node and trouble point downstream perfects area
Duan Suoyou node has Qk> 0 shows that transient power flows to route by bus；
(3) delay time of setting switch: the switch time delay time is incremented by successively by the lateral source side of load, first switch
Delay time be set as t, the delay time of second switch is set as 2t, and so on；
(4) carry out fault location, judge fault section and to perfect section, perfect section be at least exist a child node and
Its identical track section in root node transient power direction；The fault section is any child node and its root node transient power
Contrary track section.Specific fault location process is as follows:
1) master control FTU sends fault-signal to its child node FTU, and transient power direction is reported master control by child node FTU
FTU, master control FTU compare section two sides transient power direction；
2) if all child nodes are contrary with its root node transient power, it is determined as fault section；Otherwise, it is determined that being
Perfect section；
3) for least significant end test point: if its Qk< 0, then section is fault section downstream；Otherwise, it is determined that perfect area
Section.
(5) control fault section source-side switches tripping, that is, meet Qk< 0 and the switch trip for reaching delay time；
(6) interconnection switch detects that side has voltage, side no-voltage to close a floodgate, and downstream sound circuit switches to spare
Power supply；
(7) standby electricity source is closed to after fault point, is controlled fault section standby electricity source switch trip, that is, is met Qk< 0
And reach the switch trip of delay time, so far, fault section isolation perfects section and restores to operate normally.
Hand in hand route delay time setting as shown in Figure 1, the switch time delay time still by the lateral source side of load successively
It is incremented by.The delay time respectively switched when being powered by power supply 1 is using the 1st set of definite value, number in each switch time delay time such as Fig. 1 dotted line frame
According to.The delay time respectively switched when being powered by power supply 2 is using the 2nd set of definite value, number in each switch time delay time such as Fig. 1 solid box
According to.If switch S12、S21Between singlephase earth fault, switch CB occurs1、S11、S12Detect local load power direction by electricity
Power supply 2 is directed toward in source 1, and the delay time respectively switched at this time uses the 1st set of definite value, and transient power QkSingle-phase connect is respectively started in < 0
Earth fault timing, switch S after 6t12Tripping, isolated fault.After Fault Isolation success, interconnection switch S22Detect that there is voltage in side
Side no-voltage, close a floodgate switches to backup power source 2, restores switch S22To switch S21/S23/S24Section power supply.Backup power source
2 sides are bonded to fault point, switch CB2、S32、S31、S22、S21Detect that power supply 1 is directed toward by power supply 2 in local load power direction, this
When the delay time that respectively switchs using the 2nd set of definite value, and transient power Qk< 0, is respectively started singlephase earth fault timing, after 4t
Switch S21Tripping, isolated fault.
Method provided by the invention is verified using the circuit diagram of simulation system shown in Fig. 2, access is maximum in figure holds
Amount is distributed generation resource 3 of 30kW, can simulate 2 110kV substations, 1 cable feeder line looped network and 1 overhead feeder ring
Net.The state of switch can arbitrarily change the division state that certain in route switchs, each website from remote console manual setting
The FTU for configuring a support ethernet communication is accessed all FTU same using optical fiber IP network as ad hoc communications network
Local area network.FTU, that is, panel switches monitor terminal, the delay time respectively switched when being powered by power supply 2 are respectively opened using the 1st set of definite value
Close K23、K24、K7/K25、K26、K8/K27、K28、K9/K29、K31Delay time adjust respectively for 16s, 14s, 12s, 10s, 8s,
6s,4s,2s；The delay time respectively switched when being powered by power supply 3 uses the 2nd set of definite value, respectively switch K23、K24/K7、K25、K26/K8、
K27、K28/K9、K29、K31Delay time is adjusted respectively as 2s, 4s, 6s, 8s, 10s, 12s, 14s, 16s.
It is powered on to simulation system, in F2Singlephase earth fault, switch K after 12s is arranged in point28Tripping, interconnection switch K25It closes a floodgate,
Switch K after 8s again27Tripping.So far, fault section isolation perfects section and restores electricity.
The present invention is not limited to above-described specific embodiment, and the foregoing is merely preferable case study on implementation of the invention
, it is not intended to limit the invention, any modification done within the spirit and principles of the present invention and changes equivalent replacement
Into etc., it should all be included in the protection scope of the present invention.
Claims (3)
1. the route small current grounding fault processing method hand in hand based on transient power direction, it is characterised in that: including following
Step:
(1) node for defining close bus bar side is root node, remaining node is child node, root node, event for fault section
Barrier point upstream perfects the root node of section, and transient zero-sequence current, transient zero-sequence voltage meet:
For the upstream that fault section child node, downstream are not broken down perfects section child node, trouble point downstream perfects section
All nodes, transient zero-sequence current, transient zero-sequence voltage meet:
Wherein, u0It (t) is fault point residual voltage；CbFor fault point upstream detection point to route between bus and all sound
Line mutual-ground capacitor, ClFor the direct-to-ground capacitance of detected downstream point to line end；ib(t)、il(t) each for fault point upstream, downstream
The fault current of test point；
(2) transient reactive power Q is definedkIt is characterized frequency range internal fault point residual voltage u0(t) derivative and fault point zero-sequence current
i0(t) corresponding mean power:
Then, fault section root node and fault point upstream perfect section root node QkIt is female to show that transient power is flowed to by route by < 0
Line；The upstream that fault section child node, downstream are not broken down perfects section child node and trouble point downstream perfects section institute
There is node to have Qk> 0 shows that transient power flows to route by bus；
(3) setting switch delay time: the switch time delay time is incremented by successively by the lateral source side of load, first switch prolong
When the time be set as t, the delay time of second switch is set as 2t, and so on；
(4) fault location is carried out, judge fault section and perfects section；
(5) control fault section source-side switches tripping, that is, meet Qk< 0 and the switch trip for reaching delay time；
(6) interconnection switch detects that side has voltage, side no-voltage to close a floodgate, and downstream sound circuit switches to standby electricity
Source；
(7) standby electricity source is closed to after fault point, is controlled fault section standby electricity source switch trip, that is, is met Qk< 0 simultaneously reaches
The switch trip of delay time, so far, fault section isolation perfects section and restores to operate normally.
2. the route small current grounding fault processing method according to claim 1 hand in hand based on transient power direction,
It is characterized by: the section that perfects is at least the presence of child node line areas identical with its root node transient power direction
Section；The fault section is any child node track section contrary with its root node transient power.
3. the route small current grounding fault processing method according to claim 2 hand in hand based on transient power direction,
It is characterized by: the carry out fault location, judges fault section and to perfect section detailed process as follows:
(1) master control FTU sends fault-signal to its child node FTU, and transient power direction is reported master control FTU by child node FTU, main
Control FTU compares section two sides transient power direction；
(2) if all child nodes are contrary with its root node transient power, it is determined as fault section；Otherwise, it is determined that being strong
Whole district's section；
(3) for least significant end test point: if its Qk< 0, then section is fault section downstream；Otherwise, it is determined that perfect section.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109387732A (en) * | 2018-12-21 | 2019-02-26 | 云南电网有限责任公司电力科学研究院 | A kind of adaptive in-situ protection method and system of small current grounding fault |
| CN109638793A (en) * | 2018-12-20 | 2019-04-16 | 国网江苏电力设计咨询有限公司 | A kind of singlephase earth fault processing method suitable for small current neutral grounding system |
| CN110308369A (en) * | 2019-07-08 | 2019-10-08 | 北京三清互联科技有限公司 | A kind of the power distribution network intelligence sensor and fault detection algorithm of Convergence gateway function |
| CN110456230A (en) * | 2019-08-29 | 2019-11-15 | 国家电网有限公司 | A kind of one-phase earthing failure in electric distribution network processing method based on dual mode capability |
| CN112491016A (en) * | 2020-11-10 | 2021-03-12 | 深圳供电局有限公司 | Selective small current self-adaptive protection method |
| CN112731201A (en) * | 2021-03-22 | 2021-04-30 | 上海宏力达信息技术股份有限公司 | Single-phase earth fault studying and judging method and system in transient zero sequence power direction |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103245879A (en) * | 2013-04-18 | 2013-08-14 | 国家电网公司 | Small current neutral grounding fault location method based on direction of transient state reactive power |
-
2018
- 2018-07-02 CN CN201810707343.XA patent/CN108963990A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103245879A (en) * | 2013-04-18 | 2013-08-14 | 国家电网公司 | Small current neutral grounding fault location method based on direction of transient state reactive power |
Non-Patent Citations (1)
| Title |
|---|
| 王森，周刚，汤晓石，冯耀轩，宋伊宁: "基于暂态功率方向的小电流接地故障处理技术", 《浙江省电力学会2017年度优秀论文集》 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109638793A (en) * | 2018-12-20 | 2019-04-16 | 国网江苏电力设计咨询有限公司 | A kind of singlephase earth fault processing method suitable for small current neutral grounding system |
| CN109387732A (en) * | 2018-12-21 | 2019-02-26 | 云南电网有限责任公司电力科学研究院 | A kind of adaptive in-situ protection method and system of small current grounding fault |
| CN110308369A (en) * | 2019-07-08 | 2019-10-08 | 北京三清互联科技有限公司 | A kind of the power distribution network intelligence sensor and fault detection algorithm of Convergence gateway function |
| CN110456230A (en) * | 2019-08-29 | 2019-11-15 | 国家电网有限公司 | A kind of one-phase earthing failure in electric distribution network processing method based on dual mode capability |
| CN110456230B (en) * | 2019-08-29 | 2021-04-27 | 国家电网有限公司 | Power distribution network single-phase earth fault processing method based on dual-mode function |
| CN112491016A (en) * | 2020-11-10 | 2021-03-12 | 深圳供电局有限公司 | Selective small current self-adaptive protection method |
| CN112491016B (en) * | 2020-11-10 | 2023-06-20 | 深圳供电局有限公司 | Selective small-current self-adaptive protection method |
| CN112731201A (en) * | 2021-03-22 | 2021-04-30 | 上海宏力达信息技术股份有限公司 | Single-phase earth fault studying and judging method and system in transient zero sequence power direction |
| CN112731201B (en) * | 2021-03-22 | 2022-08-12 | 上海宏力达信息技术股份有限公司 | Single-phase earth fault studying and judging method and system in transient zero sequence power direction |
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