CN102332708A - Relay protection method in distribution system - Google Patents
Relay protection method in distribution system Download PDFInfo
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- CN102332708A CN102332708A CN201110214333A CN201110214333A CN102332708A CN 102332708 A CN102332708 A CN 102332708A CN 201110214333 A CN201110214333 A CN 201110214333A CN 201110214333 A CN201110214333 A CN 201110214333A CN 102332708 A CN102332708 A CN 102332708A
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Abstract
The invention, which belongs to the relay protection technology field, discloses a relay protection method in a distribution system. Problems on rapid and effective detection, elimination and isolation of faults by a relay protection apparatus are solved; and a stable guarantee is provided for security of a whole electrical power system. Grounding zero sequence current protection is installed at a transformer in a heavy current grounding system and is utilized as back-up protection of primary protection of the transformer and back-up protection of a grounding short circuit of an adjacent element. According to the invention, faults can be rapidly and effectively detected, eliminated and isolated by a relay protection apparatus and a stable guarantee is provided for security of a whole electrical power system.
Description
Technical field
The method of relaying protection in a kind of distribution system of the present invention relates in particular to a kind of method of relaying protection.
Background technology
China's relay protection of power system technology development situation Protection Technology develops along with power system development, and it and electric power system are closely related to improving constantly of requiring of operational reliability.Fuse is exactly the initial simple overcurrent protection that occurs, and still is widely used in low-voltage circuit and power consumption equipment even to this day.Because power system development; Power, the generator capacity of power consumption equipment constantly increase; The tie lines of power plant, transformer station and power supply network is constantly complicated; Running current and short circuit current all constantly increase in the electric power system, and fuse can not satisfy the requirement of selectivity and rapidity, so the overcurrent relay of special cut-off device occurred acting on.The beginning of this century, relay just began to be widely used in the protection of electric power system along with power system development.Can think the beginning of Protection Technology development this period.
The develop rapidly of electric power system constantly proposes new requirement to relaying protection, and the develop rapidly of electronic technology, computer technology and the communication technology is constantly injected new vitality for the development of Protection Technology again.The development trend of following relaying protection is to computerization, networking and protection, control, measurement, the development of data communication integrated intelligent.In electric power system, distribution system with the relation of power consumer the most closely, the most direct, the production of the safe and reliable power supply direct relation all trades and professions of distribution system, huge numbers of families' life, people's life security even.Therefore in distribution system, relaying protection there is very high requirement.Adopt independent device traditionally, have special people to be responsible for, hope that protective relaying device can fast and effeciently detect, excision, isolated fault, and can restore electricity fast.Protective relaying device in the distribution system is the same with the relaying protection of whole electric power system, gone through the evolution of electromagnetic type, transistor-type, integrated circuit type, microcomputer type.So far, multi-form protection also extensively exists in distribution system and plays a role.The configuration principle of this subject study distribution system relaying protection and the calculating of adjusting are to concrete network design protection scheme.
Summary of the invention
The method of relaying protection in a kind of distribution system of the present invention has solved that protective relaying device can fast and effeciently detect, the problem of excision, isolated fault, and whole power system security is obtained stable guarantee.
The present invention adopts following technical scheme for solving the problems of the technologies described above:
The method of relaying protection in a kind of distribution system is included in the complete distribution system, mainly adopts following steps,
(1) do the main protection of circuit with current/voltage fast tripping protection and current limliting quick-break in limited time, line backup protection is made in the specified time overcurrent protection;
(2) do the main protection of circuit with the current limliting quick-break of prescribing a time limit of transient current fast tripping protection fish, line backup protection is made in the specified time overcurrent protection;
(3) do the main protection of circuit with the transient current fast tripping protection in current limliting quick-break in limited time, line backup protection is made in the specified time overcurrent protection;
(4) adopt transient current quick-break, protection as main protection to transformer T1, overcurrent protection is protected in support;
(5) transformer T2 adopts transient current quick-break, protection as main protection, and overcurrent protection is protected in support.
To the ground connection zero-sequence current protection of the installing of the transformer in the heavy current grounding system, as the backup protection of transformer main protection and the backup protection of adjacent elements ground short circuit.
Under normal distribution situation, 3Io=0 does not have electric current to pass through among the TA; Zero-sequence current protection is failure to actuate and is occurred zero-sequence current when ground short circuit takes place, when it during greater than the operating current of protection, current relay KA action; After the KT time-delay, tripping transformer both sides circuit breaker.The operating current of zero-sequence current protection should be greater than the operating current of this side outlet zero-sequence current protection reserve section.The operation time limit of protection is also than the big Δ t of the latter.
The method of relaying protection obtains following beneficial effect in a kind of distribution system of the present invention:
Protective relaying device can fast and effeciently detect, the problem of excision, isolated fault, and whole power system security is obtained stable guarantee.
Description of drawings
Fig. 1 is a schematic diagram of the present invention.
Embodiment
As shown in Figure 1; The 35kV electric power networks as shown above; Known parameters is following: system's maximum operational mode impedance 6
, minimum operational mode impedance 8
; Circuit AB, BC, CD model are LGJ-95, and geometric mean distance is 3.0m between line; Transformer T1 model is S9-6300/35, and transformer T2 model is 1000/35; Circuit AB length 16km; Circuit BC length 12km; Circuit CD length 10km.E busbar voltage 10.5kV, F busbar voltage 0.4kV; E bus peak load P
Max=5000kW,
F bus peak load P
Max=800kW,
Circuit CD peak load P
Max=6500kW,
Circuit BC peak load P
Max=7500kW,
Circuit AB peak load P
Max=900kW,
(1) to AB section circuit, do the main protection of circuit with current/voltage fast tripping protection and current limliting quick-break in limited time, line backup protection is made in the specified time overcurrent protection.The key wiring diagram and the expanded view of circuit syllogic current protection are as shown in the figure.Wherein KA1, KA2, KS1 constitute the quick-break of I section transient current; KA3, KA4, KT1, KS2 constitute the II section current quick-breaking of prescribing a time limit; KA5, KA6, KT2, KS3 constitute III section specified time overcurrent.Three section protection all acts on a public outlet auxiliary relay KOM; Any segment protect action all startup KOM; Make circuit breaker trip; Simultaneously the signal relay of correspondent section moves board, and the operator on duty just can fall the board indication from it and judge it is which cover protection action, and then the probable ranges of fault is made judgement.
(2) to BC section circuit, do the main protection of circuit with the current limliting quick-break of prescribing a time limit of transient current fast tripping protection fish, line backup protection is made in the specified time overcurrent protection.
(3) to CD section circuit, do the main protection of circuit with the transient current fast tripping protection in current limliting quick-break in limited time, line backup protection is made in the specified time overcurrent protection.
(4) adopt transient current quick-break, protection as main protection to transformer T1, overcurrent protection is protected in support.
(5) transformer T2 adopts transient current quick-break, protection as main protection, and overcurrent protection is protected in support.
To the ground connection zero-sequence current protection of the installing of the transformer in the heavy current grounding system, as the backup protection of transformer main protection and the backup protection of adjacent elements ground short circuit.
Under the normal condition, 3Io=0 does not have electric current to pass through among the TA, and zero-sequence current protection is failure to actuate and is occurred zero-sequence current when ground short circuit takes place, when it during greater than the operating current of protection, current relay KA action, after the KT time-delay, tripping transformer both sides circuit breaker.The operating current of zero-sequence current protection should be greater than the operating current of this side outlet zero-sequence current protection reserve section.The operation time limit of protection is also than the big Δ t of the latter.
The method of relaying protection in a kind of distribution system of the present invention makes that protective relaying device can fast and effeciently detect, the problem of excision, isolated fault, and whole power system security is obtained stable guarantee.
Claims (5)
1. the method for relaying protection in the distribution system is characterized in that: may further comprise the steps,
(1) do the main protection of circuit with current/voltage fast tripping protection and current limliting quick-break in limited time, line backup protection is made in the specified time overcurrent protection;
(2) do the main protection of circuit with the current limliting quick-break of prescribing a time limit of transient current fast tripping protection fish, line backup protection is made in the specified time overcurrent protection;
(3) do the main protection of circuit with the transient current fast tripping protection in current limliting quick-break in limited time, line backup protection is made in the specified time overcurrent protection;
(4) adopt transient current quick-break, protection as main protection to transformer T1, overcurrent protection is protected in support;
(5) transformer T2 adopts transient current quick-break, protection as main protection, and overcurrent protection is protected in support.
2. the method for relaying protection in a kind of distribution system according to claim 1; It is characterized in that: said transformer 1 or transformer 2 are when heavy current grounding system, and installing ground connection zero-sequence current protection is as the backup protection of transformer main protection and the backup protection of adjacent elements ground short circuit.
3. under normal distribution situation, 3Io=0 does not have electric current to pass through among the TA; Zero-sequence current protection is failure to actuate and is occurred zero-sequence current when ground short circuit takes place, when it during greater than the operating current of protection, current relay KA action; After the KT time-delay, tripping transformer both sides circuit breaker.
4. the operating current of zero-sequence current protection should be greater than the operating current of this side outlet zero-sequence current protection reserve section.
5. the operation time limit of protection is also than the big Δ t of the latter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110214333A CN102332708A (en) | 2011-07-29 | 2011-07-29 | Relay protection method in distribution system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110214333A CN102332708A (en) | 2011-07-29 | 2011-07-29 | Relay protection method in distribution system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102332708A true CN102332708A (en) | 2012-01-25 |
Family
ID=45484369
Family Applications (1)
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|---|---|---|---|
| CN201110214333A Withdrawn CN102332708A (en) | 2011-07-29 | 2011-07-29 | Relay protection method in distribution system |
Country Status (1)
| Country | Link |
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| CN (1) | CN102332708A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102969696A (en) * | 2012-11-14 | 2013-03-13 | 国家电网公司 | Power system relay protection treatment method |
| CN104882863A (en) * | 2015-06-15 | 2015-09-02 | 神华集团有限责任公司 | Relay protection configuration integrated equipment for power-plant electric auxiliary system |
| CN105186497A (en) * | 2015-09-02 | 2015-12-23 | 国网上海市电力公司 | Pole-mounted circuit breaker configuration structure and configuration method for high-voltage overhead line |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101267099A (en) * | 2008-05-09 | 2008-09-17 | 哈尔滨工业大学 | Method for realizing self-adapted over-current protection of power and distribution supply cable |
| CN101552461A (en) * | 2009-01-09 | 2009-10-07 | 天津大学 | Method for protecting power distribution network containing distributed generation |
| CN201540676U (en) * | 2008-12-11 | 2010-08-04 | 浙江天煌科技实业有限公司 | Factory power supply integrated automatic training device |
-
2011
- 2011-07-29 CN CN201110214333A patent/CN102332708A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101267099A (en) * | 2008-05-09 | 2008-09-17 | 哈尔滨工业大学 | Method for realizing self-adapted over-current protection of power and distribution supply cable |
| CN201540676U (en) * | 2008-12-11 | 2010-08-04 | 浙江天煌科技实业有限公司 | Factory power supply integrated automatic training device |
| CN101552461A (en) * | 2009-01-09 | 2009-10-07 | 天津大学 | Method for protecting power distribution network containing distributed generation |
Non-Patent Citations (1)
| Title |
|---|
| 罗钰玲等: "《电力系统微机继电保护》", 28 February 2005 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102969696A (en) * | 2012-11-14 | 2013-03-13 | 国家电网公司 | Power system relay protection treatment method |
| CN104882863A (en) * | 2015-06-15 | 2015-09-02 | 神华集团有限责任公司 | Relay protection configuration integrated equipment for power-plant electric auxiliary system |
| CN104882863B (en) * | 2015-06-15 | 2017-08-25 | 神华集团有限责任公司 | A kind of power plant auxiliary system relay protection scheme complexes |
| CN105186497A (en) * | 2015-09-02 | 2015-12-23 | 国网上海市电力公司 | Pole-mounted circuit breaker configuration structure and configuration method for high-voltage overhead line |
| CN105186497B (en) * | 2015-09-02 | 2018-11-09 | 国网上海市电力公司 | A kind of pole-mounted circuit breaker configuration structure and configuration method for high voltage overhead lines |
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Application publication date: 20120125 |