CN104319748B - Quick adjustment method for parallel line branching factor in substation area distance protection section III - Google Patents
Quick adjustment method for parallel line branching factor in substation area distance protection section III Download PDFInfo
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- CN104319748B CN104319748B CN201410539684.2A CN201410539684A CN104319748B CN 104319748 B CN104319748 B CN 104319748B CN 201410539684 A CN201410539684 A CN 201410539684A CN 104319748 B CN104319748 B CN 104319748B
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- 230000001681 protective effect Effects 0.000 abstract description 5
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Abstract
The invention relates to a quick adjustment method for a parallel line branching factor in a substation area distance protection section III, and belongs to the field of a power system protection and control technology. The method comprises the steps of judging whether a protective starting line is a parallel line structure, quickly modifying the parallel line branching factor if the protective starting line is a parallel line structure and trip or switch on is caused, and then calculating a distance ground section III and a phase distance ground connection III in accordance with a current protective setting value after the definite value of the distance section III is quickly modified, and judging whether fault is caused; directly performing protection algorithm processing if the protective starting line is not a parallel line structure. According to the quick adjustment method provided by the invention, the contradiction of the substation area distance protection section III in flexibility and selectivity can be overcome; furthermore, a parallel line running condition can be quickly adjusted, so as to improve the reliability of the motion in the substation area distance protection section III.
Description
Technical field
The invention belongs to protecting electrical power system and control technology field, more particularly to a kind of station for being applied to intelligent substation
Domain distance protection III section parallel lines braning factor fast adjustment methods.
Background technology
Intelligent substation has richly endowed by nature at aspects such as secondary device compatibility, interoperability, data resource sharings
Advantage, bring digitized change to power system.Based on IEC61850 standards, the jump/combined floodgate of transformer station's full station equipment
The station such as information, voltage x current information domain information is shared.Protective strategy based on the shared information in station domain is in the ascendant.The application
People discloses a kind of protection control method of Digitized transformation station equipment and first integrated change in patent CN101478146A
Protect the multi-function device with control in power station;A kind of intelligent substation integrated protection is disclosed in patent CN102761106A
Fast starting and phasor calculating method.
Patent CN102403701A puies forward the adaptive distance protection method of double-circuit line of intelligent substation, according to adopting in real time
The adjacent lines analog quantity information and position of the switch information of collection, judges adjacent lines running status belongs to following which kind of situation:①
Adjacent lines both sides are normally run, and 2. adjacent lines both sides sky hangs operation, 3. the operation of the pendant of adjacent lines two ground, according to judgement knot
Really, dynamic adjusts this circuit apart from I section definite values.But the method does not consider that adjacent lines occurs single-phase fault, protection first
The single-phase power flow transfer situation caused after secondary single-phase tripping operation;And due to the quick acting apart from I sections, the method is in real-time
Upper existing problems, it is difficult to realize.
Self-adaptive sites method apart from III sections is not yet referred to.
The content of the invention
The purpose of the present invention is, to solve the deficiency of prior art, to propose a kind of station domain distance protection III sections parallel lines point
Coefficient fast adjustment method is propped up, in the case of changing for intelligent substation parallel lines on off state, station domain distance protection is improved
The reliability of III section actions.
A kind of station domain distance protection III section parallel lines braning factor fast adjustment methods proposed by the present invention, its feature exists
In the method is comprised the following steps:
Step 1) judge to protect whether trigger circuit L1 is parallel lines structure, if into step 2);Otherwise directly enter
Row step 4) carry out protection algorism process;
Step 2) whether according to GOOSE message information, judging the parallel lines of circuit L1 has tripping operation or closes a floodgate, if jumping or
Combined floodgate information, then carry out step 3);Otherwise, into step 4);
Step 3) jump according to the parallel circuit of circuit L1 or combined floodgate information, braning factor is adjusted, specifically include:
If single-phase jump or combined floodgate information, then the phase is adjusted, be with the braning factor that A phases are represented:
K′Ab=1/M
In formula, K 'AbAfter tripping for parallel circuit A phases change braning factor, M be jump or close a floodgate after parallel lines A phases time
Number;
A phase ground distance III section setting valves are revised as again:
Zset.A.III=KKz1llocal+KKK′AbZset.II_remote
In formula, Zset.A.IIIFor the A phase ground distance III section setting valves of circuit L1;KKFor safety factor, typically take 0.7~
0.8;z1For the unit length positive sequence impedance of circuit L1, llocalIt is line length for circuit L1;Zset.II_remoteFor circuit L1's
Subordinate's circuit is apart from II section setting valves;K′AbThe braning factor changed after tripping for parallel circuit A phases;
If three-phase breaker tripping and closing information, then impedance of adjusting to three-phase is all modified, and adjustment braning factor is:
Kb'=1/M
In formula, Kb' it is amended braning factor, M is that the parallel lines after jumping or closing a floodgate return number;
III section setting valves of adjusting the distance again are modified:
Zset.III=KKz1llocal+KKKb′Zset.II_remote
In formula, Zset.IIIDistance for circuit L1 is grounded III sections, phase spacing III section setting valves, and three-phase is changed;KK
For safety factor, 0.7~0.8 is typically taken;z1For the unit length positive sequence impedance of circuit L1, llocalIt is this grade of circuit for circuit L1
Length;Zset.II_remoteIt is subordinate's circuit apart from II section setting valves;Kb' it is amended braning factor;
Step 4) ground distance III sections, the protection calculating of phase spacing III sections are carried out according to current protection seting value.
Of the invention the characteristics of and beneficial effect:
The characteristics of station domain distance protection III section parallel lines braning factor fast adjustment methods proposed by the invention is:Base
In the shared GOOSE tripping operation messages in intelligent substation war domain, after transformer station's parallel lines on off state is changed, adjustment point as early as possible
The setting valve that coefficient changes distance protection then is propped up, the method is applied to station domain ground distance protection III sections and station domain spaced apart
From protection III sections.
The beneficial effect of the invention is:Avoid malfunction, the tripping caused because protecting definite value different from real-time branch coefficient
Situation, improves the reliability of station domain distance protection III section actions.
Description of the drawings
Fig. 1 is the station domain distance protection III section parallel lines braning factor fast adjustment method schematic diagrams using the present invention.
Specific embodiment
A kind of station domain distance protection III section parallel lines braning factor fast adjustment methods proposed by the present invention, with reference to accompanying drawing
And embodiment detailed description is as follows.
Station domain distance protection III section parallel lines braning factor fast adjustment method flow processs proposed by the present invention as shown in figure 1,
The method is comprised the following steps:
Step 1) judge to protect whether trigger circuit L1 is parallel lines structure, if into step 2);Otherwise directly enter
Row step 4) carry out protection algorism process;
Step 2) whether according to GOOSE message information, judging the parallel lines of circuit L1 has tripping operation or closes a floodgate, if jumping or
Combined floodgate information, then carry out step 3);Otherwise, into step 4);
Step 3) jump according to the parallel circuit of circuit L1 or combined floodgate information, braning factor is adjusted, specifically include:
If single-phase jump or combined floodgate information, then adjust the phase, it is with the braning factor that A phases are represented:
K′Ab=1/M
In formula, K 'AbAfter tripping for parallel circuit A phases change braning factor, M be jump or close a floodgate after parallel lines A phases time
Number;
A phase ground distance III section setting valves are revised as again:
Zset.A.III=KKz1llocal+KKK′AbZset.II_remote
In formula, Zset.A.IIIFor the A phase ground distance III section setting valves of circuit L1;KKFor safety factor, typically take 0.7~
0.8;z1For the unit length positive sequence impedance of circuit L1, llocalIt is line length for circuit L1;Zset.II_remoteFor circuit L1's
Subordinate's circuit is apart from II section setting valves;K′AbThe braning factor changed after tripping for parallel circuit A phases;
If three-phase breaker tripping and closing information, then impedance of adjusting to three-phase is all modified, and adjustment braning factor is:
Kb'=1/M
In formula, Kb' it is amended braning factor, M is that the parallel lines after jumping or closing a floodgate return number;
III section setting valves of adjusting the distance again are modified:
Zset.III=KKz1llocal+KKKb′Zset.II_remote
In formula, Zset.IIIFor the ground distance III sections of circuit L1, phase spacing III section setting valves, three-phase is changed;KK
For safety factor, 0.7~0.8 is typically taken;z1For the unit length positive sequence impedance of circuit L1, llocalIt is this grade of circuit for circuit L1
Length;Zset.II_remoteIt is subordinate's circuit apart from II section setting valves;Kb' it is amended braning factor;
Step 4) ground distance III sections, phase spacing III sections protection calculating are carried out (specifically according to current protection seting value
Method belongs to routine techniquess).
On the basis of station domain information is shared, domain of standing can know the switch changed position letter of a plurality of circuit apart from back-up protection
Breath.After circuit L1 protections are started, before distance protection III section processing routines are carried out, parallel lines are divided according to GOOSE message
Prop up coefficient quickly to be adjusted, protection definite value is adjusted then.So quick adjustment braning factor can effectively improve parallel lines distance
Protection III sections performance, especially to accident overload during single-phase power flow transfer selectivity.
Claims (1)
1. a kind of station domain distance protection III section parallel lines braning factor fast adjustment methods, it is characterised in that the method include with
Lower step:
Step 1) judge to protect whether trigger circuit L1 is parallel lines structure, if into step 2);Otherwise directly walked
It is rapid 4) to carry out protection algorism process;
Step 2) according to GOOSE message information, whether have tripping operation or close a floodgate, if jumping or closing a floodgate if judging the parallel lines of circuit L1
Information, then carry out step 3);Otherwise, into step 4);
Step 3) jump according to the parallel circuit of circuit L1 or combined floodgate information, braning factor is adjusted, specifically include:
If single-phase jump or combined floodgate information, then adjust the phase, it is with the braning factor that A phases are represented:
K′Ab=1/M
In formula, K 'AbAfter tripping for parallel circuit A phases change braning factor, M be jump or close a floodgate after parallel lines A phases return count;
A phase ground distance III section setting valves are revised as again:
Zset.A.III=KKz1llocal+KKK′AbZset.II_remote
In formula, Zset.A.IIIFor the A phase ground distance III section setting valves of circuit L1;KKFor safety factor, value is 0.7~0.8;
z1For the unit length positive sequence impedance of circuit L1, llocalIt is line length for circuit L1;Zset.II_remoteFor the subordinate of circuit L1
Circuit is apart from II section setting valves;K′AbThe braning factor changed after tripping for parallel circuit A phases;
If three-phase breaker tripping and closing information, then impedance of adjusting to three-phase is all modified, and adjustment braning factor is:
K′b=1/M
In formula, K 'bFor amended braning factor, M is that the parallel lines after jumping or closing a floodgate return number;
III section setting valves of adjusting the distance again are modified:
Zset.III=KKz1llocal+KKK′bZset.II_remote
In formula, Zset.IIIFor the ground distance III sections of circuit L1, phase spacing III section setting valves, three-phase is changed;KKFor can
By coefficient, 0.7~0.8 is typically taken;z1For the unit length positive sequence impedance of circuit L1, llocalIt is that this grade of circuit is long for circuit L1
Degree;Zset.II_remoteIt is subordinate's circuit apart from II section setting valves;K′bFor amended braning factor;
Step 4) ground distance III sections, the protection calculating of phase spacing III sections are carried out according to current protection seting value.
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CN104901263B (en) * | 2015-05-15 | 2017-12-29 | 国网冀北电力有限公司 | A kind of branch coefficient calculation method of power system adaptive setting |
CN105552862B (en) * | 2015-12-31 | 2017-11-17 | 国家电网公司 | The region-type back-up protection method simplified for III of Distance section protection seting |
CN108345706B (en) * | 2017-01-24 | 2021-10-08 | 中国石油化工股份有限公司 | Power supply fast switching simulation method and model |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101813736A (en) * | 2009-04-15 | 2010-08-25 | 河南省电力公司 | Distance protection measurement method of double-circuit line on the same pole |
CN102403701A (en) * | 2011-11-23 | 2012-04-04 | 河海大学 | Self-adaptive distance protection method for double-circuit line of intelligent substation |
CN102437557A (en) * | 2011-12-15 | 2012-05-02 | 河南省电力公司洛阳供电公司 | Quick-acting and selective parallel double-circuit running lines (110kV) and quick-action and selection method thereof |
CN103779851A (en) * | 2014-02-28 | 2014-05-07 | 广东电网公司电力调度控制中心 | Distant back-up protection checking method for ultra-high-voltage line |
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2014
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Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101813736A (en) * | 2009-04-15 | 2010-08-25 | 河南省电力公司 | Distance protection measurement method of double-circuit line on the same pole |
CN102403701A (en) * | 2011-11-23 | 2012-04-04 | 河海大学 | Self-adaptive distance protection method for double-circuit line of intelligent substation |
CN102437557A (en) * | 2011-12-15 | 2012-05-02 | 河南省电力公司洛阳供电公司 | Quick-acting and selective parallel double-circuit running lines (110kV) and quick-action and selection method thereof |
CN103779851A (en) * | 2014-02-28 | 2014-05-07 | 广东电网公司电力调度控制中心 | Distant back-up protection checking method for ultra-high-voltage line |
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