CN109167333A - It is a kind of using residual voltage as the zero-sequenceprotection method and apparatus of criterion - Google Patents
It is a kind of using residual voltage as the zero-sequenceprotection method and apparatus of criterion Download PDFInfo
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- CN109167333A CN109167333A CN201811120224.0A CN201811120224A CN109167333A CN 109167333 A CN109167333 A CN 109167333A CN 201811120224 A CN201811120224 A CN 201811120224A CN 109167333 A CN109167333 A CN 109167333A
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- Prior art keywords
- residual voltage
- automatic circuit
- voltage failure
- failure
- detecting
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Classifications
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- 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
- H02H3/05—Details with means for increasing reliability, e.g. redundancy arrangements
-
- 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
- H02H3/021—Details concerning the disconnection itself, e.g. at a particular instant, particularly at zero value of current, disconnection in a predetermined order
Abstract
The present invention provides a kind of using residual voltage as the zero-sequenceprotection method and apparatus of criterion, includes the following steps: the residual voltage of (1) detection route, and if there is residual voltage failure, then automatic circuit requests first time separating brake；(2) after the completion of first time separating brake, if still there is residual voltage failure, residual voltage failure is judged not in the region of automatic circuit administration, which requests closing locking；If residual voltage failure vanishes, it is judged as residual voltage failure in the region that the automatic circuit is administered.Technical solution provided by the invention, closing locking function is additionally arranged in automatic circuit, when there is residual voltage failure, by there is no sectionalisers belonging to the region of residual voltage failure to carry out closing locking, detect that the sectionaliser will not trip when residual voltage failure again, to reduce the scope of power outage and power off time in non-faulting region, the reliability of power distribution network is enhanced.
Description
The application is the divisional application of following applications, the applying date of original application: on August 31st, 2016, the application of original application
Number: 2016107974719, the denomination of invention of original application: a kind of using residual voltage as the zero-sequenceprotection method and apparatus of criterion.
Technical field
The present invention relates to electric network protection field of terminal technology, and in particular to a kind of using residual voltage as the zero-sequenceprotection of criterion
Method and apparatus.
Background technique
In modern power systems, often far from load center, the electric energy that power plant issues generally is wanted in large-scale power plant
Be sent to load center by high pressure or EHV transmission network, then in load center by the lower network of voltage class electric energy
It is assigned to the user of different voltages grade.The network that distribution electric energy effect is mainly played in this power network becomes power distribution network.
Applicable more and more extensive now with electricity, the requirement to distribution network reliability and safety is also higher and higher.
Automatic circuit and sectionaliser are equipment important in power distribution network, have the function of in-situ protection.Wherein automatic circuit can be according to scheduled
It cut-offs and coincidence sequence is cut-off automatically in alternating current circuit and reclosing operation, and automatically reset or be latched behind, itself
With control defencive function；Sectionaliser has delay automatic switching-in function, and cooperation automatic circuit use being capable of isolated fault line areas
Section realizes automatic protection.
Automatic circuit and sectionaliser cooperate, and can be realized alternate protection, zero-sequenceprotection and functions such as reclosing three times, are carrying out
When zero-sequence voltage protection, all areas can all trip after detecting residual voltage failure, during eliminating residual voltage failure,
Often cause non-faulting region large area, prolonged power failure, the poor reliability of power distribution network is caused, to industrial production and resident
Life is made troubles.
Summary of the invention
The present invention provide it is a kind of using residual voltage as the zero-sequenceprotection method and apparatus of criterion, for solving above-mentioned elimination zero
The problem of the difference of distribution network reliability caused by when sequence voltage failure.
It is a kind of using residual voltage as the zero-sequenceprotection method of criterion, include the following steps:
(1) residual voltage for detecting route, if there is residual voltage failure, then automatic circuit requests first time separating brake；
(2) after the completion of first time separating brake, if still there is residual voltage failure, judge residual voltage failure not at this
The region of automatic circuit administration, the automatic circuit request closing locking；
If residual voltage failure vanishes, it is judged as residual voltage failure in the region that the automatic circuit is administered.
Further, further include following steps:
(1) after there is residual voltage failure in the region of certain automatic circuit administration, automatic circuit request is closed a floodgate, and carries out first
Secondary acceleration protection；
If there is not residual voltage failure, first time acceleration protection success, into normal operating conditions；
If detecting residual voltage failure within the specified time after first time acceleration protection, automatic circuit request point
Lock locking；
If occurring residual voltage failure outside the specified time after first time acceleration protection, first time acceleration protection is lost
It loses, which requests second of separating brake；
After the completion of (2) second of separating brake, which requests to close a floodgate again, carries out second of acceleration protection；
If detecting residual voltage failure when second of acceleration protection, which requests separating brake locking；
If not occurring residual voltage when second of acceleration protection, second of acceleration protection success, into normal work
Make state.
Further, in first time separating brake or second of separating brake, if detecting that automatic circuit is switched to close by gate-dividing state
Lock state then carries out hand and closes acceleration protection；
If detecting residual voltage failure, hand closes acceleration protection failure, which requests separating brake locking；
If residual voltage failure vanishes, hand closes acceleration protection success, into normal operating conditions.
Further, in first time acceleration protection or second of acceleration protection, if detecting automatic circuit by combined floodgate shape
State becomes gate-dividing state, then by automatic circuit request separating brake locking.
Further, further include following steps: when device powers on or manual reset, dividing if detecting that automatic circuit is in
Lock state then carries out separating brake locking to the automatic circuit；If detecting that automatic circuit is in "on" position, carries out hand and close acceleration guarantor
Shield；
If detecting residual voltage failure, hand closes acceleration protection failure, which requests separating brake locking；
If not detecting residual voltage failure, hand closes acceleration protection success, into normal operating conditions.
It is a kind of using residual voltage as the zero sequence protection device of criterion, including following module:
(1) residual voltage for detecting route, if there is residual voltage failure, then automatic circuit requests the mould of first time separating brake
Block；
(2) after the completion of first time separating brake, if still there is residual voltage failure, judge residual voltage failure not at this
The region of automatic circuit administration, the automatic circuit request closing locking；
If residual voltage failure vanishes, it is judged as residual voltage failure in the module in the region that the automatic circuit is administered.
Further, further include following module:
(1) after there is residual voltage failure in the region of certain automatic circuit administration, automatic circuit request is closed a floodgate, and carries out first
Secondary acceleration protection；
If there is not residual voltage failure, first time acceleration protection success, into normal operating conditions；
If detecting residual voltage failure within the specified time after first time acceleration protection, automatic circuit request point
Lock locking；
If occurring residual voltage failure outside the specified time after first time acceleration protection, first time acceleration protection is lost
It loses, which requests the module of second of separating brake；
After the completion of (2) second of separating brake, which requests to close a floodgate again, carries out second of acceleration protection；
If detecting residual voltage failure when second of acceleration protection, which requests separating brake locking；
If not occurring residual voltage when second of acceleration protection, second of acceleration protection success, into normal work
Make the module of state.
Further, in first time separating brake or second of separating brake, if detecting that automatic circuit is switched to close by gate-dividing state
Lock state then carries out hand and closes acceleration protection；
If detecting residual voltage failure, hand closes acceleration protection failure, which requests separating brake locking；
If residual voltage failure vanishes, hand closes acceleration protection success, into normal operating conditions.
Further, in first time acceleration protection or second of acceleration protection, if detecting automatic circuit by combined floodgate shape
State becomes gate-dividing state, then by automatic circuit request separating brake locking.
Further, further include following module: when device powers on or manual reset, dividing if detecting that automatic circuit is in
Lock state then carries out separating brake locking to the automatic circuit；If detecting that automatic circuit is in "on" position, carries out hand and close acceleration guarantor
Shield；
If detecting residual voltage failure, hand closes acceleration protection failure, which requests separating brake locking；
If not detecting residual voltage failure, hand closes acceleration protection success, into the module of normal operating conditions.
It is provided by the invention a kind of using residual voltage as the zero-sequenceprotection method and apparatus of criterion, it is additionally arranged in automatic circuit
Closing locking function, when there is residual voltage failure, by there is no automatic circuit belonging to the region of residual voltage failure into
Row closing locking detects that the sectionaliser will not trip when residual voltage failure, to reduce non-faulting region again
Scope of power outage and power off time enhance the reliability of power distribution network.
Residual voltage error protection is added when device starts or resets, is determining the region for residual voltage failure occur
When acceleration protection, first time acceleration protection and second of acceleration protection are closed to its automatic circuit setting hand, can exclude in power distribution network
Transient fault, further enhance the reliability of power distribution network.
Detailed description of the invention
Fig. 1 is in embodiment using residual voltage as the flow chart of the zero-sequenceprotection method of criterion.
Specific embodiment
It is provided by the invention a kind of using residual voltage as the zero-sequenceprotection method and apparatus of criterion, it is additionally arranged in automatic circuit
Closing locking function.In the prior art, automatic circuit after detecting residual voltage failure in power distribution network will do it tripping,
If there are still can also trip residual voltage failure after combined floodgate.The closing locking function refers to close a floodgate to automatic circuit after
Locking, even if residual voltage failure still will not trip.
When sectionaliser is under closing locking state, if residual voltage Failure elimination carries out the delay of certain time, when
Delay carries out combined floodgate unlock after reaching, into normal operating conditions.
For there is the region of residual voltage failure, corresponding automatic circuit is subjected to separating brake locking, does not allow its combined floodgate.
When sectionaliser is under separating brake blocking, when detecting that the automatic circuit device is converted to "on" position by gate-dividing state
When, illustrate there is artificial participation, carried out closing by hand, executes hand at this time and close acceleration protection.
When executing hand conjunction acceleration protection: if hand detects residual voltage failure when closing acceleration protection, hand, which closes, to be accelerated
Protection failure, the automatic circuit request separating brake locking；
If detection does not detect that residual voltage, hand close acceleration protection success, the sectionaliser when hand closes acceleration protection
It is overlapped and enters normal operating conditions.
The present invention is described in detail with reference to the accompanying drawing.
Embodiment of the method
A kind of using residual voltage as the zero-sequenceprotection method of criterion provided by the present embodiment, flow chart is as shown in Figure 1, tool
Steps are as follows for body:
(1) after device powers on or manual reset, into initial state；The state of automatic circuit is detected under initial state, such as
Fruit is in gate-dividing state, then is latched the automatic circuit separating brake；If detected in "on" position, hand is carried out to the automatic circuit
Close acceleration protection；
(2) residual voltage is detected in normal operation, if there is residual voltage failure, then automatic circuit request the
Separating brake；
(3) after the completion of the automatic circuit device first time separating brake, if detecting that automatic circuit switchs to "on" position by gate-dividing state,
Hand then is carried out to the automatic circuit and closes acceleration protection；
If detecting that residual voltage failure still has, it is judged as residual voltage failure not in the administration of the automatic circuit
In range, which requests closing locking；
If can't detect residual voltage failure, it is judged as that residual voltage failure, should in the compass of competency of automatic circuit
Automatic circuit request is closed a floodgate, and first time acceleration protection is carried out；
It (4), should if detecting that the automatic circuit is switched to gate-dividing state by "on" position in first time acceleration protection
Automatic circuit requests separating brake locking；
If there is not residual voltage failure, the success of first time acceleration protection is carried out, into normal operating conditions；
If detecting residual voltage failure within the specified time after first time acceleration protection, automatic circuit request point
Lock locking；
If occurring residual voltage failure outside the specified time after first time acceleration protection, first time acceleration protection is lost
It loses, which requests second of separating brake；
(5) after the completion of second of separating brake of the automatic circuit, if detecting that automatic circuit switchs to "on" position by gate-dividing state,
Hand then is carried out to automatic circuit and closes acceleration protection；
Otherwise the automatic circuit requests to close a floodgate again, carries out second of acceleration protection；
When (6) second of acceleration protection, if detecting that the automatic circuit is switched to gate-dividing state by "on" position, this is heavy
Clutch requests separating brake locking；
If detecting residual voltage failure, second of acceleration protection failure, the automatic circuit requests separating brake locking；
If there is not residual voltage failure, second of acceleration protection success is switched to normal operating conditions.
In the present embodiment, when detecting that residual voltage failure occurs in automatic circuit, it is carried out hand close acceleration protection or
Person carries out acceleration protection twice；It, can be with when detecting that residual voltage failure occurs in some automatic circuit as other embodiments
Separating brake locking is directly carried out to it, and residual voltage fault clearance is waited to close a floodgate again to it later.
Installation practice:
It is a kind of using residual voltage as the zero sequence protection device of criterion, including following module:
(1) residual voltage for detecting route, if there is residual voltage failure, then automatic circuit requests the mould of first time separating brake
Block；
(2) after the completion of first time separating brake, if still there is residual voltage failure, judge residual voltage failure not at this
The region of automatic circuit administration, the automatic circuit request closing locking；
If residual voltage failure vanishes, it is judged as residual voltage failure in the module in the region that the automatic circuit is administered.
It is provided in this embodiment a kind of using residual voltage as the zero sequence protection device of criterion, it both can correspond to computer journey
Each software module of sequence process can also correspond to each hardware module.These software modules can correspond respectively to above-mentioned side
Each step of method embodiment, hardware module, which can solidify above-mentioned software module, to be realized.
Specific embodiment of the present invention is presented above, but the present invention is not limited to described embodiment.
Under the thinking that the present invention provides, to the skill in above-described embodiment by the way of being readily apparent that those skilled in the art
Art means are converted, are replaced, are modified, and play the role of with the present invention in relevant art means it is essentially identical, realize
Goal of the invention it is also essentially identical, the technical solution formed in this way is to be finely adjusted to be formed to above-described embodiment, this technology
Scheme is still fallen in protection scope of the present invention.
Claims (6)
1. a kind of using residual voltage as the zero-sequenceprotection method of criterion, which comprises the steps of:
(1) residual voltage for detecting route, if there is residual voltage failure, then automatic circuit requests first time separating brake；
(2) after the completion of first time separating brake, if still there is residual voltage failure, judge residual voltage failure not in the coincidence
The region of device administration, the automatic circuit request closing locking；
If residual voltage failure vanishes, it is judged as residual voltage failure in the region that the automatic circuit is administered.
2. according to claim 1 a kind of using residual voltage as the zero-sequenceprotection method of criterion, which is characterized in that first
When secondary separating brake, if detecting that automatic circuit switchs to "on" position by gate-dividing state, carries out hand and close acceleration protection；
If detecting residual voltage failure, hand closes acceleration protection failure, which requests separating brake locking；
If residual voltage failure vanishes, hand closes acceleration protection success, into normal operating conditions.
3. according to claim 1 a kind of using residual voltage as the zero-sequenceprotection method of criterion, which is characterized in that further include
Following steps: when device powers on or when manual reset, if detecting that automatic circuit is in gate-dividing state, carries out to the automatic circuit
Separating brake locking；If detecting that automatic circuit is in "on" position, carries out hand and close acceleration protection；
If detecting residual voltage failure, hand closes acceleration protection failure, and sectionaliser requests separating brake locking；
If not detecting residual voltage failure, hand closes acceleration protection success, into normal operating conditions.
4. a kind of using residual voltage as the zero sequence protection device of criterion, which is characterized in that including following module:
(1) residual voltage for detecting route, if there is residual voltage failure, then automatic circuit requests the module of first time separating brake；
(2) after the completion of first time separating brake, if still there is residual voltage failure, judge residual voltage failure not in the coincidence
The region of device administration, the automatic circuit request closing locking；
If residual voltage failure vanishes, it is judged as residual voltage failure in the module in the region that the automatic circuit is administered.
5. according to claim 4 a kind of using residual voltage as the zero sequence protection device of criterion, which is characterized in that first
When secondary separating brake, if detecting that automatic circuit switchs to "on" position by gate-dividing state, carries out hand and close acceleration protection；
If detecting residual voltage failure, hand closes acceleration protection failure, and automatic circuit requests separating brake locking；
If residual voltage failure vanishes, hand closes acceleration protection success, into normal operating conditions.
6. according to claim 5 a kind of using residual voltage as the zero sequence protection device of criterion, which is characterized in that further include
Following module: when device powers on or when manual reset, if detecting that automatic circuit is in gate-dividing state, carries out to the automatic circuit
Separating brake locking；If detecting that automatic circuit is in "on" position, carries out hand and close acceleration protection；
If detecting residual voltage failure, hand closes acceleration protection failure, and sectionaliser requests separating brake locking；
If not detecting residual voltage failure, hand closes acceleration protection success, into the module of normal operating conditions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811120224.0A CN109167333B (en) | 2016-08-31 | 2016-08-31 | Zero sequence protection method and device with zero sequence voltage as criterion |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811120224.0A CN109167333B (en) | 2016-08-31 | 2016-08-31 | Zero sequence protection method and device with zero sequence voltage as criterion |
| CN201610797471.9A CN106329465B (en) | 2016-08-31 | 2016-08-31 | It is a kind of using residual voltage as the zero-sequenceprotection method and apparatus of criterion |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610797471.9A Division CN106329465B (en) | 2016-08-31 | 2016-08-31 | It is a kind of using residual voltage as the zero-sequenceprotection method and apparatus of criterion |
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| CN109167333A true CN109167333A (en) | 2019-01-08 |
| CN109167333B CN109167333B (en) | 2020-07-17 |
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| CN201811120224.0A Active CN109167333B (en) | 2016-08-31 | 2016-08-31 | Zero sequence protection method and device with zero sequence voltage as criterion |
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| CN106849033B (en) * | 2017-04-14 | 2019-03-12 | 云南电网有限责任公司电力科学研究院 | A kind of optimization method of inverter zero sequence overvoltage protection logic |
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| CN102074938A (en) * | 2010-11-05 | 2011-05-25 | 珠海许继电气有限公司 | Single-phase earth fault isolation system and method for electrical distribution network |
| CN102931644B (en) * | 2011-12-27 | 2015-07-15 | 许继电气股份有限公司 | Regional power grid fault isolation and recovery method |
| CN102593798B (en) * | 2012-02-21 | 2014-02-26 | 南京因泰莱配电自动化设备有限公司 | Comprehensive relay protection method applied to intelligent switch |
| CN102624090B (en) * | 2012-03-28 | 2016-01-13 | 北京水木源华电气有限公司 | Based on the intelligent high-pressure panel switches of electronic mutual inductor |
| CN103022992A (en) * | 2012-11-23 | 2013-04-03 | 山东电力集团公司 | Feeder ground positioning method based on dispersion zero sequence voltage detection |
| CN103746353A (en) * | 2013-12-31 | 2014-04-23 | 宏秀电气有限公司 | Self-healing control system of intelligent distribution network and working method thereof |
| CN104037762A (en) * | 2014-06-28 | 2014-09-10 | 国家电网公司 | Distribution line section switch control method |
| CN204517504U (en) * | 2015-04-27 | 2015-07-29 | 国家电网公司 | A kind of overhead transmission line feed line automatization system |
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| Publication number | Publication date |
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| CN106329465A (en) | 2017-01-11 |
| CN106329465B (en) | 2018-09-18 |
| CN109167333B (en) | 2020-07-17 |
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