CN102570595A - Method for processing fault of main transformer of transformer substation - Google Patents

Abstract

The invention relates to a fault processing method and especially relates to a method for processing a fault of a main transformer of a transformer substation. The method comprises the following four steps: touring a transformer according to a standardization working instruction so as to ensure equipment to reach a relative standard and strengthening the tour to the equipment which is abnormal and has a defect; before the main transformer starts working, checking and making sure that the transformer reaches the standard and an operation condition is possessed; strengthening the tour in special weather; carrying out protection operation on the main transformer according to a scheduling rule, a site operation rule and a related requirement; strengthening monitoring if condition allows. Therefore, operation safety of the transformer substation can be protected.

Description

A kind of transforming plant main transformer depressor fault handling method

Technical field

The present invention relates to a kind of fault handling method, relate in particular to a kind of transforming plant main transformer depressor fault handling method.

Background technology

Electric power is the important energy source and the economic lifeline of country, and safety, high-quality ground ensure that the electric power the relation between supply and demand is to national economy.But; Power grid accident happens occasionally, this accident often owing to the insulation of circuit in the breakdown or transformer station a certain element break down and cause, if can not make in time accident, judge accurately; Correct processing; The very possible fault that causes other element linksystem makes the expansion of accident scope, even causes transformer station to be stood entirely having a power failure or power grid accident.The power transformation operator on duty can understand, grasp principle that substation accident handles and precautionary measures under the equipment failure state, and the nature of trouble that judges rightly is handled rapidly and orderly and the control accident plays directive function.

Summary of the invention

1, the rule of accident treatment

1) substation accident and abnormality processing must strictly observe electrical safe working order, schedule regulation, on-the-spot operating standard and relevant trouble free service regulation, obey dispatch control, the correct execution dispatching command.

2) if when the person and the safety of equipment do not constituted a threat to; Should be at pains to keep its equipment operation, generally speaking, outaged equipment easily; If when the person and the safety of equipment are constituted a threat to; Should be at pains to remove this threat, if when injuring the person with equipment safe, just arrestment moves immediately.

3) when the processing accident, should start the stand-by equipment operation with relevant rules regulation according to field condition, take the necessary security measure, the equipment that does not cause the accident is carried out necessary security isolate, keep its normal operation, the accident that prevents enlarges.

4) in handling accident process, at first should guarantee the safe operation and the normal power supply of institute's electricity consumption, when system or relevant devices accident and misoperation cause institute's electricity consumption power outage, should at first handle and recover the operation of institute's electricity consumption, to guarantee its power supply.

5) accident treatment is advanced action situation, alarm window signal, incident printing, indication and the equipment situation of operator on duty according at that time operational mode, weather, working condition, relaying protection and automatics, in time distinguishes nature of occurence and scope.

6) as early as possible to the user that stops using particularly the responsible consumer emergency power supply restore electricity.

7) when device damage by oneself the time, should report to the higher level immediately.Before the maintainer reaches the spot, should carry out safety measure earlier.

8) in order to prevent the expansion of accident, in the accident treatment process, the operator on duty of transformer station should get in touch with dispatcher's protection, and active is with the progress report dispatcher of accident treatment.

9) after each accident treatment is finished, all to carry out detailed record, and login as requested on running log, accident obstacle and circuit breaker trip minute book.The operation squad leader will organize experienced person on duty to put the field accident mabage report in order.

10) do not find out when accident, when needing the maintainer further to test, the operations staff must not with relay-set fall the board signal return so that the professional further analyzes.

2, the general procedure of accident treatment

1) trip condition, information bulletin, alarm window signal, the accident phenomenon of timely inspection record circuit breaker, the brief report scheduling.

2) the action situation of check protection and automatics, and accident printed report.

3) rapidly the equipment in the fault coverage is carried out visual examination, and accident symbol and inspection situation detail are reported to scheduling.

4) according to the accident characteristic, fault analysis and judgement scope and accident interruption scope accomplish to know what's what.

5) threat to the person and device security is removed in the take measures development of restriction accident.

6) at first faulty component is restored electricity.

7) the guilty culprit scope is isolated rapidly or fix a breakdown, restore electricity.

8) equipment that damages is carried out safety measure, report to relevant higher level, by professional's trouble shooting equipment.

General procedure to accident treatment may be summarized to be: timely record, and simple and clear the report, inspection rapidly, the detail report, serious analysis is accurately judged, the restriction development is fixed a breakdown, and restores electricity.

Embodiment

The accident that busbar fault causes

1) according to the operational mode before the accident, situation such as protection and automatics action situation, signal, light word, circuit breaker trip and the outer shape of equipment are distinguished nature of trouble, scope, when losing as if the station electricity consumption, answer the electricity consumption of priority restores station, and should drop into emergency lighting night.

2) should the circuit breaker on the decompression bus be broken off, should earlier capacitor group circuit breaker being broken off of capacitor group arranged.

3) if any tangible phenomenon of the failure, then should can isolate with timely with circuit breaker or isolating switch and eliminate according to the fault point, as if what can isolate or eliminate, should isolate immediately or eliminate, the inspection bus is no abnormal, to the normally power supply of back recovery normal device of bus charging.If fault can not isolate, eliminate,, can with fault-free equipment all to another section bus, restore electricity for double bus scheme.

4) as not finding any phenomenon of the failure, equipment is not pinpointed the problems in determining, and has guard signal to fall board in along separate routes, possibly belong to external fault, or problem so that misoperation is arranged because of the bus differential protection current circuit.Should report scheduling,, temporarily withdraw from bus differential protection according to dispatching command.After the external fault isolation, bus adds operation again, recovers normal operating mode.Check bus differential protection malfunction reason by the professional.

When 5) bus is sent in examination, send bus without the bus examination as far as possible, should note preventing non-Switching Synchronization simultaneously.

The accident that the main transformer fault causes

1) behind the main transformer emergency stop valve trip, should check that relevant device has or not overload,, just manage to reduce load (dropping into spare transformer, contact scheduling transfer load) immediately if when overload is arranged.

2) if main protection is moved, must not send before the elimination fault that do not ascertain the reason.

3) as the transformer of reclosing is housed, tripping operation back reclosing is unsuccessful, considers to send after answering checkout facility again.

4), can send behind the inspection main transformer no problem like just overcurrent protection action.

5) transformer station that has spare transformer or stand-by power supply to drop into automatically, considered spare transformer or stand-by power supply when operating transformer trips, and then the transformer of inspection tripping operation.

6) as because of line fault, protect the action of bypassing the immediate leadership to cause the transformer tripping operation, after then the faulty line circuit breaker breaks off, can recover the transformer operation immediately.

7) should at first guarantee the power supply of institute's electricity consumption after transformer trips.

The accident that the power circuit fault causes

1) during the route protection would trip, the operation operator on duty is check protection and automatics action situation conscientiously, and inspection failure wave-recording action situation is analyzed and protected and the action behavior of automatics.

2) in time report, be convenient to scheduling and grasp situation in time, all sidedly, carry out analysis and judgement to scheduling.

3) route protection would trip, no matter reclosing device whether move or successful reclosing whether, all tackle circuit breaker and carry out visual examination.Three phase positions, oil level, the oil colours of main inspection circuit breaker and have or not abnormal conditions such as oil spout.

4) all route protection tripping operations should check that circuit breaker institute connection device, outlet partly have or not phenomenon of the failure.

5) transmission line of charge operation, trial line charging not without exception after the tripping operation.

6) after the full cable route protection would trip, not ascertaining the reason can not trial line charging.

7) low frequency load shedding equipment, accident Union Switch Device and cutting apparatus far away are the important protective devices that guarantees power system security, stable operation.Line-breaker is tripped by above device action, has an accident in the illustrative system, must dispatch report to the higher level.Though do not had ground connection or dash fault on the tangent line road, system also do not have to recover normal this, do not obtain the order of higher level's scheduling before, inaccurate combined floodgate send.

The accident of standing and causing with power failure

1) when two stations are subsequent use with one of one in transformer operation, should stand immediately and switch, failure transformer is had a power failure with transformer.

2) when two stations are divided the Dai Zhanyong load with transformer, should the fault station be had a power failure with transformer, the station electricity consumption network interconnecting circuit that closes moves to good station all loads with transformer.

3) stand and forbid to have a power failure, use circuit breaker it is had a power failure with isolating switch with power transformer interior fault.

4) station with transformer fault after, guarantee that another station uses the transformer reliability service.Report scheduling in case of necessity.

1 busbar fault precautionary measures

When 1) the unloaded bus of 220KV stops sending the electricity operation, for being connected with the voltage-type instrument transformer on the bus.Because series resonance over-voltage very easily takes place for shunt capacitance and bus-bar potential transformer between contact of breaker, cause the voltage transformer blast.When therefore bus charges, should after the bus charging is normal, close the voltage transformer isolating switch again.During power failure, reversed in order.

2) during the parallel operation of two groups of voltage transformers, must high-pressure side parallel connection earlier, just allow the secondary parallel connection then, prevent operating voltage transformer by secondary to uncharged voltage transformer reverse charge, cause the voltage circuit fuse blows.

3) when abnormality takes place in voltage automatic switchover loop, the Ying Xianxiang scheduling is filed an application, and the protection that will be referred to scope is stopped using or switched on another group busbar voltage loop, just can handle then.

4) after the voltage disconnection signal is represented, should the protection of being correlated be stopped using.As: distance protection and direction carrier current protection, through the protection of direction element control.

2 main transformer trouble-saving measures

1) by the standardization effort guiding book transformer is maked an inspection tour, equipment should reach relevant criterion, has the equipment of unusual and defective should strengthen making an inspection tour.

2) main transformer starts and should check and accept as requested before putting into operation and reach standard, possesses the condition of putting into operation.

3) special weather should be strengthened making an inspection tour.As: on the checkout facility no-sundries is arranged before the strong wind, the inspection porcelain insulator has discharge off burn vestige behind the thunder and lightning.

When 4) main transformer protection being operated, should be undertaken by schedule regulation, on-the-spot operating standard and related request.With good conditionsi should the reinforcement guarded.

3 power circuit trouble-saving measures

When 1) power circuit normally moves, should monitor three-phase current, the balance of voltage, protective device correctly drops into by scheduling requirement and pertinent regulations.

2) the primary equipment operation is normal, the no defective that influences system's operation.

3) during system's parallel operation, should meet condition arranged side by side.There is the circuit breaker of synchronous device when normal or accident treatment, all should use synchronizing mode.

4 stations are with the measure of power supply trouble-saving

1) by the standardization effort guiding book transformer is maked an inspection tour, equipment should reach relevant criterion, has the equipment of unusual and defective should strengthen making an inspection tour.

2) stand to start and to check and accept as requested before putting into operation and reach standard, possess the condition of putting into operation with transformer.

When the station is operated with tranformer protection, should be undertaken by schedule regulation, on-the-spot operating standard and related request.With good conditionsi should the reinforcement guarded.

Claims (1)

1. transforming plant main transformer depressor fault handling method, it is characterized in that: this method comprises following 4 steps:

1) by the standardization effort guiding book transformer is maked an inspection tour, equipment should reach relevant criterion, has the equipment of unusual and defective should strengthen making an inspection tour;

2) main transformer starts and should check and accept as requested before putting into operation and reach standard, possesses the condition of putting into operation;

3) special weather should be strengthened making an inspection tour;

When 4) main transformer protection being operated, should be undertaken by schedule regulation, on-the-spot operating standard and related request; With good conditionsi should the reinforcement guarded.