CN105186472A - Line longitudinal differential protection method for transformer station area information collection - Google Patents
Line longitudinal differential protection method for transformer station area information collection Download PDFInfo
- Publication number
- CN105186472A CN105186472A CN201510661687.8A CN201510661687A CN105186472A CN 105186472 A CN105186472 A CN 105186472A CN 201510661687 A CN201510661687 A CN 201510661687A CN 105186472 A CN105186472 A CN 105186472A
- Authority
- CN
- China
- Prior art keywords
- differential protection
- longitudinal differential
- current
- interval
- station
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
The invention discloses a line longitudinal differential protection method for transformer station area collection. The method includes the steps of: 1) collecting current of all intervals on a bus where a line is; 2) obtaining the voltage grade, CT transformation ratio and angle turning mode of each interval, and reducing current of each interval to a corresponding interval where the line is; 3) forming incomplete differential current of a local side by summing the current of each interval after reduction; 4) through a braking current calculation method, forming incomplete braking current of the local side; and 5) by performing data synchronization and transmission on a line fiber channel and a line protection device of an opposite side, realizing line longitudinal differential protection. The line longitudinal differential protection method for transformer station area collection can realizes longitudinal differential protection having selectivity and full-range quickness under the condition that a transformer station line is not equipped with a CT, improve reliability and safety of a transformer station, and has good application prospects.
Description
Technical field
The present invention relates to Relay Protection Technology in Power System field, be specifically related to a kind of circuit longitudinal differential protection method of substation areas of transformer station information taken.
Background technology
Along with a large amount of accesses with distributed energy that increase rapidly of power load, power grid construction obtains and develops fast, but it is in short supply by land resource, earth clearance is difficult, there is the various factors such as mistake in understanding in citizen to power transmission and transforming equipment electromagnetic radiation, the floor space of current transformer substation is more and more less, especially for the traction substation of high-speed railways, the floor space of the transformer station that the one-end substation of industrial and mining enterprises etc. are special is also limited further, therefore, often inlet wire CT cannot be installed in point of incoming cables, inlet wire cannot configure longitudinal differential protection, when distribution line is shorter, also syllogic distance protection cannot be configured, thus cause inlet wire cannot configure to have and optionally protect fast, reduce reliability and the fail safe of transformer station.
Summary of the invention
Technical problem solved by the invention is that the floor space of existing transformer station is limited, and inlet wire CT often cannot be installed in point of incoming cables, causes inlet wire cannot configure to have and optionally protect fast, reduces the reliability of transformer station and the problem of fail safe.The circuit longitudinal differential protection method of substation areas of transformer station information taken of the present invention; can when substation line do not install carry out CT; realize the longitudinal differential protection with selectivity and gamut quick-action, improve reliability and the fail safe of transformer station, have a good application prospect.
In order to achieve the above object, the technical solution adopted in the present invention is:
A circuit longitudinal differential protection method for substation areas of transformer station information taken, is characterized in that: comprise the following steps,
Step (1), this station, side domain information aggregating apparatus gathers spaced electric current on the bus of transformer lines place; If transformer bay every bus bar side without CT, then other sides of transformer are inputted as interval;
Step (2), this station, side domain information aggregating apparatus obtains electric pressure, CT no-load voltage ratio, the corner mode at each interval, and by the electric current reduction at each interval in the corresponding interval at circuit place;
Step (3), the electric current at each interval after reduction by summation, is formed the incomplete differential current I of this side by this station, side domain information aggregating apparatus
dM, as shown in formula (1),
I
dM＝I
M2+I
M3+…+I
Mn(1)
Wherein, I
m2~ I
mnfor each spacing current after reduction;
Step (4), this station, side domain information aggregating apparatus, by stalling current account form, as shown in formula (2), forms the half braking electric current I of this side
rM,
I
rM＝|I
M2|+|I
M3|+…+|I
Mn|(2)
Wherein, I
m2~ I
mnfor each spacing current after reduction;
Step (5), this station, side domain information aggregating apparatus is connected with offside line protective devices by circuit optical fiber passage, completes data syn-chronization and the transmission of this side and offside, receives the electric current I of offside
n, according to formula (3), formula (4), obtain the longitudinal differential protection difference stream I of this side
dwith longitudinal differential protection stalling current I
r,
I
d＝I
dM+I
N(3)
I
r＝I
rM+|I
N|(4)
And send the longitudinal differential protection difference stream I of this side
dwith longitudinal differential protection stalling current I
r, realize circuit longitudinal differential protection.
The circuit longitudinal differential protection method of aforesaid substation areas of transformer station information taken; it is characterized in that: step (1); gather spaced electric current on the bus of place, this side line road; acquisition mode comprises routine sampling access and digital sampling access; described routine sampling access is for instrument transformer is by cable access station domain information aggregating apparatus, and described digital sampling access comprises point-to-point sample mode and networking sample mode.
The invention has the beneficial effects as follows: the circuit longitudinal differential protection method of substation areas of transformer station information taken of the present invention; can when substation line do not install carry out CT; realize the longitudinal differential protection with selectivity and gamut quick-action; improve reliability and the fail safe of transformer station, have a good application prospect.
Accompanying drawing explanation
Fig. 1 is the flow chart of the circuit longitudinal differential protection method of substation areas of transformer station information taken of the present invention.
Fig. 2 is the schematic diagram of this station, side domain information aggregating apparatus current acquisition of the present invention and transmission.
Embodiment
Below in conjunction with Figure of description, the present invention is further illustrated.
The circuit longitudinal differential protection device of substation areas of transformer station information taken of the present invention, can when substation line do not install carry out CT, realize having the longitudinal differential protection of selectivity and gamut quick-action; improve reliability and the fail safe of transformer station; as shown in Figure 1, comprise the following steps
This station, side domain information aggregating apparatus of step (1) gathers spaced electric current on the bus of circuit place; , as shown in Figure 2, this side is M side, and offside is N side, if transformer bay every bus bar side without CT, then other sides of transformer are inputted as interval;
Gather spaced electric current on the bus of transformer lines place, acquisition mode comprises routine sampling access and digital sampling access, described routine sampling access is for instrument transformer is by cable access device, and described digital sampling access comprises point-to-point sample mode and networking sample mode;
Step (2), this station, side domain information aggregating apparatus obtains electric pressure, CT no-load voltage ratio, the corner mode at each interval, and by the electric current reduction at each interval in the corresponding interval at circuit place;
Step (3), the electric current at each interval after reduction by summation, is formed the incomplete differential current I of this side by this station, side domain information aggregating apparatus
dM, as shown in formula (1),
I
dM＝I
M2+I
M3+…+I
Mn(1)
Wherein, I
m2~ I
mnfor each spacing current after reduction;
Step (4), this station, side domain information aggregating apparatus, by stalling current account form, as shown in formula (2), forms the half braking electric current I of this side
rM,
I
rM＝|I
M2|+|I
M3|+…+|I
Mn|(2)
Wherein, I
m2~ I
mnfor each spacing current after reduction;
Step (5), this station, side domain information aggregating apparatus is connected with offside line protective devices by circuit optical fiber passage, completes data syn-chronization and the transmission of this side and offside, receives the electric current I of offside
n, according to formula (3), formula (4), obtain the longitudinal differential protection difference stream I of this side
dwith longitudinal differential protection stalling current I
r,
I
d＝I
dM+I
N(3)
I
r＝I
rM+|I
N|(4)
And send the longitudinal differential protection difference stream I of this side
dwith longitudinal differential protection stalling current I
r, realize circuit longitudinal differential protection.
In sum; the circuit longitudinal differential protection method of substation areas of transformer station information taken of the present invention; can when substation line do not install carry out CT; realize the longitudinal differential protection with selectivity and gamut quick-action; improve reliability and the fail safe of transformer station, have a good application prospect.
More than show and describe general principle of the present invention and principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and specification just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection range is defined by appending claims and equivalent thereof.
Claims (2)
1. a circuit longitudinal differential protection method for substation areas of transformer station information taken, is characterized in that: comprise the following steps,
Step (1), this station, side domain information aggregating apparatus gathers spaced electric current on the bus of transformer lines place; If transformer bay every bus bar side without CT, then other sides of transformer are inputted as interval;
Step (2), this station, side domain information aggregating apparatus obtains electric pressure, CT no-load voltage ratio, the corner mode at each interval, and by the electric current reduction at each interval in the corresponding interval at circuit place;
Step (3), the electric current at each interval after reduction by summation, is formed the incomplete differential current I of this side by this station, side domain information aggregating apparatus
dM, as shown in formula (1),
I
dM＝I
M2+I
M3+…+I
Mn(1)
Wherein, I
m2~ I
mnfor each spacing current after reduction;
Step (4), this station, side domain information aggregating apparatus, by stalling current account form, as shown in formula (2), forms the half braking electric current I of this side
rM,
I
rM＝|I
M2|+|I
M3|+…+|I
Mn|(2)
Wherein, I
m2~ I
mnfor each spacing current after reduction;
Step (5), this station, side domain information aggregating apparatus is connected with offside line protective devices by circuit optical fiber passage, completes data syn-chronization and the transmission of this side and offside, receives the electric current I of offside
n, according to formula (3), formula (4), obtain the longitudinal differential protection difference stream I of this side
dwith longitudinal differential protection stalling current I
r,
I
d＝I
dM+I
N(3)
I
r＝I
rM+|I
N|(4)
And send the longitudinal differential protection difference stream I of this side
dwith longitudinal differential protection stalling current I
r, realize circuit longitudinal differential protection.
2. the circuit longitudinal differential protection method of substation areas of transformer station information taken according to claim 1; it is characterized in that: step (1); gather spaced electric current on the bus of place, this side line road; acquisition mode comprises routine sampling access and digital sampling access; described routine sampling access is for instrument transformer is by cable access station domain information aggregating apparatus, and described digital sampling access comprises point-to-point sample mode and networking sample mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510661687.8A CN105186472B (en) | 2015-10-14 | 2015-10-14 | A kind of circuit longitudinal differential protection method of substation areas of transformer station information taken |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510661687.8A CN105186472B (en) | 2015-10-14 | 2015-10-14 | A kind of circuit longitudinal differential protection method of substation areas of transformer station information taken |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105186472A true CN105186472A (en) | 2015-12-23 |
| CN105186472B CN105186472B (en) | 2018-09-21 |
Family
ID=54908394
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510661687.8A Active CN105186472B (en) | 2015-10-14 | 2015-10-14 | A kind of circuit longitudinal differential protection method of substation areas of transformer station information taken |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105186472B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107591784A (en) * | 2017-08-23 | 2018-01-16 | 中国南方电网有限责任公司 | A kind of distribution statements based on collusion adaptive incomplete differential protection method of circuit |
| CN113270856A (en) * | 2021-05-07 | 2021-08-17 | 国网河南省电力公司电力科学研究院 | Circuit pilot differential protection method for synchronization based on current zero crossing point |
| CN114400638A (en) * | 2022-01-20 | 2022-04-26 | 广东韶钢松山股份有限公司 | Differential protection circuit and power supply system |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5461653A (en) * | 1977-10-25 | 1979-05-18 | Toshiba Corp | Protective current transformer for gas insulated electric facility |
| CN1581625A (en) * | 2004-04-13 | 2005-02-16 | 贺家李 | Transmission line micro processor adaptive split-phase longitudinal difference protection method |
| CN101651324A (en) * | 2009-06-08 | 2010-02-17 | 国电南瑞科技股份有限公司 | Longitudinal differential protection method based on synchronous sampling point vector compensation principle |
| CN101841446A (en) * | 2010-05-25 | 2010-09-22 | 许继集团有限公司 | Pilot channel transmission device, optical fiber differential protective device and method |
| CN102570391A (en) * | 2012-03-13 | 2012-07-11 | 南京南瑞继保电气有限公司 | Configuration realization method for transformer protection |
| CN103384058A (en) * | 2013-07-08 | 2013-11-06 | 国电南瑞科技股份有限公司 | Substation area protection based integrated failure protection method for substations |
| CN103532237A (en) * | 2013-10-21 | 2014-01-22 | 中国南方电网有限责任公司 | Wide-area protection control system based on IEEE1588 network timing protocol |
| CN104201650A (en) * | 2014-08-01 | 2014-12-10 | 国网辽宁省电力有限公司朝阳供电公司 | Current regulation based area differential protection method |
| CN104466903A (en) * | 2014-11-26 | 2015-03-25 | 济南大学 | Current transformer saturation recognition method for differential protection |
-
2015
- 2015-10-14 CN CN201510661687.8A patent/CN105186472B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5461653A (en) * | 1977-10-25 | 1979-05-18 | Toshiba Corp | Protective current transformer for gas insulated electric facility |
| CN1581625A (en) * | 2004-04-13 | 2005-02-16 | 贺家李 | Transmission line micro processor adaptive split-phase longitudinal difference protection method |
| CN101651324A (en) * | 2009-06-08 | 2010-02-17 | 国电南瑞科技股份有限公司 | Longitudinal differential protection method based on synchronous sampling point vector compensation principle |
| CN101841446A (en) * | 2010-05-25 | 2010-09-22 | 许继集团有限公司 | Pilot channel transmission device, optical fiber differential protective device and method |
| CN102570391A (en) * | 2012-03-13 | 2012-07-11 | 南京南瑞继保电气有限公司 | Configuration realization method for transformer protection |
| CN103384058A (en) * | 2013-07-08 | 2013-11-06 | 国电南瑞科技股份有限公司 | Substation area protection based integrated failure protection method for substations |
| CN103532237A (en) * | 2013-10-21 | 2014-01-22 | 中国南方电网有限责任公司 | Wide-area protection control system based on IEEE1588 network timing protocol |
| CN104201650A (en) * | 2014-08-01 | 2014-12-10 | 国网辽宁省电力有限公司朝阳供电公司 | Current regulation based area differential protection method |
| CN104466903A (en) * | 2014-11-26 | 2015-03-25 | 济南大学 | Current transformer saturation recognition method for differential protection |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107591784A (en) * | 2017-08-23 | 2018-01-16 | 中国南方电网有限责任公司 | A kind of distribution statements based on collusion adaptive incomplete differential protection method of circuit |
| CN107591784B (en) * | 2017-08-23 | 2019-03-26 | 中国南方电网有限责任公司 | A kind of distribution statements based on collusion adaptive incomplete differential protection method of route |
| CN113270856A (en) * | 2021-05-07 | 2021-08-17 | 国网河南省电力公司电力科学研究院 | Circuit pilot differential protection method for synchronization based on current zero crossing point |
| CN113270856B (en) * | 2021-05-07 | 2022-07-26 | 国网河南省电力公司电力科学研究院 | Circuit pilot differential protection method for synchronization based on current zero crossing point |
| CN114400638A (en) * | 2022-01-20 | 2022-04-26 | 广东韶钢松山股份有限公司 | Differential protection circuit and power supply system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105186472B (en) | 2018-09-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103217622B (en) | Based on the distribution network fault line selection method of multiterminal voltage traveling wave | |
| CN103364691B (en) | A kind of overhead lines combined with cable distributed fault distance-finding method | |
| CN106093700B (en) | A kind of fault wave recording device and distance measuring method based on voltage traveling wave principle | |
| CN103499772B (en) | A kind of modified transmission line lightning stroke both-end travelling wave positioning method | |
| CN204101480U (en) | A kind of high voltage power transmission and transforming line detector | |
| CN105186472A (en) | Line longitudinal differential protection method for transformer station area information collection | |
| CN105652097A (en) | Photovoltaic grid-connected power generation system and grid-side insulation resistance detecting device thereof | |
| CN106655116A (en) | Relay protection configuration method for overhead-GIL joint line | |
| CN203688655U (en) | Online monitoring system for monitoring distribution of DC (direct current) in AC (alternating current) network | |
| He et al. | Natural frequency‐based protection scheme for voltage source converter‐based high‐voltage direct current transmission lines | |
| CN105262069A (en) | High-voltage DC line pilot protection method based on fault DC component | |
| CN104393581A (en) | Triangle looped network transient state quantity unit protection method utilizing voltage and current abrupt change quantity wavelet coefficient correlation analysis | |
| CN102223160B (en) | Power line carrier communication transmitting circuit | |
| CN103592569B (en) | A kind of extra-high-voltage direct-current transmission line fault location based on high frequency content attenuation characteristic | |
| CN106443334B (en) | A kind of distribution network fault line selection method based on zero-sequence current difference Polarity comparision | |
| CN103840556A (en) | Method for sharing multi-interval transient traveling wave signals of intelligent substation in real time | |
| CN104122489A (en) | Single-phase earth fault selection method of DC (Direct Current) transmission line | |
| CN203259663U (en) | Cable route electrification detection device | |
| CN205103299U (en) | With two return circuit induced voltage current detection device of tower | |
| CN103513160A (en) | Same-tower double-circuit direct-current transmission line fault line selection method | |
| CN102945537A (en) | Method for processing lightning-protection transformation evaluation information of electric transmission line | |
| CN103199474A (en) | Method for 500KV large cross-section wire hot-line installation of phase to phase spacers | |
| CN103334743A (en) | Formation tester ground control system | |
| CN208971139U (en) | A kind of signal isolating device of anti-electric railway traction reflux interference | |
| CN104269930B (en) | Electric network pollution data/address bus type analysis system based on PQDIF standard |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |