CN104659760A - Method for realizing automatic comprehensive protection of transformer substation - Google Patents
Method for realizing automatic comprehensive protection of transformer substation Download PDFInfo
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- CN104659760A CN104659760A CN201410275092.4A CN201410275092A CN104659760A CN 104659760 A CN104659760 A CN 104659760A CN 201410275092 A CN201410275092 A CN 201410275092A CN 104659760 A CN104659760 A CN 104659760A
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Abstract
The invention discloses a method for realizing automatic comprehensive protection of a transformer substation, and relates to the technical field of power system control equipment. The method is implemented by a comprehensive automatic device, and comprises the following steps: judging whether equipment breaks down or not according to effective values of current and voltage signals of various devices acquired by sampling, protection setting values and protection configuration; if the equipment breaks down, transmitting an action command instantaneously or after a delay according to the severity degree of a fault; removing a fault part to ensure the security of the the system or the line equipment. The problems of high operation and maintenance cost and low economic benefit of an old small transformer substation can be solved.
Description
Technical field
The present invention relates to controlling apparatus of electric power system technical field, especially a kind of implementation method of the automation of transformation substations integrated protection for 35 kv substations.
Background technology
More existing old Small Substations, station equipment is various switchboard such as, relay-set; control flow, control desks etc. are many, and wiring is complicated; staff is many, once break down, difficulty is searched in fault point; and automaticity is not high, once break down, the equipment broken down can not be excised in time; the expansion easily caused the accident; so this substation operation maintenance cost is high, economic benefit is low, has been not suitable with sending out of situation and has belonged to needs.
Summary of the invention
The object of this invention is to provide a kind of implementation method of automation of transformation substations integrated protection, it is high that it can solve old Small Substation operation expense, the problem that economic benefit is low.
In order to solve the problem, the technical solution used in the present invention is: the implementation method of this automation of transformation substations integrated protection, A, realize with integrated automation device, this device comprises the primary module be made up of single-chip microcomputer, is provided with the input module of alternating current, voltage signal converter, comprise drive circuit, divide-shut brake controls, and divide-shut brake monitors, anti-jump loop, control the output module of power supply monitoring circuit, power module and the administration module be made up of single-chip microcomputer; Described administration module is connected with described primary module through singlechip serial communication, described input module, output module, and power module is connected with described primary module by substrate;
B, its implementation are:
One, route protection: the electric current obtained according to sampling, the effective value of voltage signal, phase relation and protection seting value, relaying configuration differentiate whether this circuit or adjacent lines jeopardize the fault of this line facility safety, as occurred, then according to the order of severity of fault, instantaneous or time delay sends action command, faulty component is excised, to ensure the safety of system and this line facility;
Two, main transformer protection: according to effective value, switch state signal and protection seting value, the relaying configuration such as phase relation and main transformer gas, temperature of main transformer high and low pressure side electric current, voltage, differentiate whether main transformer self breaks down and whether system jeopardizes the fault of main transformer safe operation, as broken down, send action command, main transformer is excised by system, to ensure main transformer safety, prevent main transformer from damaging or making failure propagation;
Three, electric capacity protection: the voltage, the current effective value that obtain according to sampling, differentiate whether electric capacity has fault or system operational parameters whether entail dangers to capacitive safety, then send action command if any fault, capacitor is excised by system, with anti-tamper electric capacity or make failure propagation;
Four, distribution becomes protection: the distribution for Y/Y0 connection becomes or station becomes, according to original edge voltage, electric current that sampling obtains, former, pair limit zero-sequence current and the signal such as gas, temperature, differentiate whether transformer itself breaks down, whether short circuit or the overload of outside, its pair of limit, as broken down then according to fault severity level, instantaneous or time delay disconnects former limit circuit breaker, transformer is excised by system, in order to avoid damage transformer or make transformer fault expand;
Five, motor protection: according to operational factors such as motor voltage, mains side electric current and zero-sequence currents that sampling obtains, differentiate whether motor is short-circuited, overload, stall and fault or the abnormal operating condition such as operating voltage is too low, as broken down, then according to the order of severity of fault, time delay or instantaneous by motor excision, to ensure the safety of motor;
Six, motor main protection: the information such as the motor voltage obtained according to sampling, mains side and neutral point current, residual voltage, zero-sequence current, exciting voltage, exciting current; differentiate whether motor itself stator or rotor windings short-circuit or ground connection occur; whether there is the abnormal operating condition such as overload, loss of excitation, excitation unit fault or step-out; as occurred; then according to the extent of injury of fault to motor; instantaneous or time delay disjunction motor main circuit breaker and field switch, to ensure the safety of motor.
In technique scheme, more specifically scheme can also be: the single-chip microcomputer of described primary module is 16 embedded 87C196NT single-chip microcomputers.
Further: described power module is switching power supply.
Further: the single-chip microcomputer of described administration module is embedded 89C51RD+ single-chip microcomputer.
Owing to have employed technique scheme, the present invention compared with prior art, the beneficial effect had is: owing to have employed advanced computer technology, modern electronic technology, the function to substation equipment such as the communication technology and the information processing technology reconfigures, optimal design, to the ruuning situation execution monitoring of transformer station's armamentarium, measure, control and coordinate, complete substation operation monitoring and controlling task, instead of transformer station's conventional equipment, letter is for substation secondary wiring, transformer station is once break down, in time faulty equipment can be excised, failure propagation can not be made, so, reduce operation expense, improve economic benefit.
Accompanying drawing explanation
Fig. 1 is block diagram of the present invention.
Fig. 2 is primary module electrical principle block diagram.
Fig. 3 is administration module electrical principle block diagram.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described:
Integrated automation device shown in Fig. 1, comprise the primary module 1 be made up of 16 embedded 87C196NT single-chip microcomputers, be provided with the input module 2 of alternating current, voltage signal converter, comprise drive circuit, divide-shut brake controls, and divide-shut brake monitors, anti-jump loop, control the output module 3 of power supply monitoring circuit, power module 4 and the administration module 5 be made up of embedded 89C51RD+ single-chip microcomputer; Administration module 5 is connected with primary module 1 through singlechip serial communication, input module 2, output module 3, and power module 4 is connected with primary module 1 by substrate 6.
Power module 4 is a wide voltage stabilizing, high jamproof plate switch stabilized voltage power supply; Additional working power 220 volts (exchanging or direct current) is transformed into 5 volts, positive and negative 12 volts, 24 volts low-voltage dc power supplies, for the single-chip microcomputer in device and interface circuit provide power supply through power module 4.
Administration module 5 is in fact an Intelligent Human-Machine Interface, receives keyboard commands in I/O mode, drives LCD display and indicator light, realizes human-computer dialogue; With the single-chip microcomputer exchange message of serial communication mode and primary module 1, Fig. 3.
Operation principle: one, signal sampling
A, analog signal are sampled: the rated value sent here by system voltage instrument transformer, current transformer is 0 ~ 57.7(100) lie prostrate and 0 ~ 5 alternating voltage, the current signal of pacifying, after the voltage on input module 2, power pack are isolated and be transformed into low voltage signal, deliver to each input of multi-channel A/D device transducer.The 87C196NT single-chip microcomputer of primary module 1 starts A/D conversion under sampling routine controls, and each analog channel A/D transformation result is read in single-chip microcomputer, Fig. 2.
B, pass amount are read in: each switch state signal, after the interface circuit on primary module 1 and Phototube Coupling, is read at a high speed by single-chip microcomputer.
C, frequency signal read in: busbar voltage and line voltage distribution are transformed into after low voltage signal through voltage changer, square-wave signal is transformed into again by zero-crossing comparator, these two square-wave signals are read in by the high speed timing entrance of the single-chip microcomputer of primary module 1, the adjacent rising time of the lower square wave two-phase of meter is the cycle of voltage, and the time difference between busbar voltage square wave and periodic voltage square wave rising edge is the phase difference of two voltages.
Two, signal transacting
The process of a, alternating current, voltage signal: the electric current, the voltage sample value that are converted to through A/D, after fourier-transform, can obtain phase induced current, the effective value of voltage and phase difference.Protective current and voltage differentiate protection act for defence program.Voltage and measurement current value, after angle compensation, can obtain active-power P, reactive power Q, power factor COS φ.P, Q can be obtained meritorious, idle electric degree to time integral.
B, switch state signal process: through the switch state signal read at a high speed, after software filtering, obtain the information such as each on off state and displacement time.
C, frequency signal process: each time signal obtained of sampling, can obtain frequency and phase signal through computing.
Three, protection philosophy
A, route protection: the route protection of 35 kilovolts and following electric pressure is electric current, voltage protection, the electric current obtained according to sampling, the effective value of voltage signal, phase relation and protection seting value, relaying configuration differentiate whether this circuit or adjacent lines jeopardize the fault of this line facility safety.As occurred, then according to the order of severity of fault, instantaneous or time delay sends action command, excises, faulty component to ensure the safety of system and this line facility.
B, main transformer protection: according to effective value, switch state signal and protection seting value, the relaying configuration such as phase relation and main transformer gas, temperature of main transformer high and low pressure side electric current, voltage, differentiate whether main transformer self breaks down and whether system jeopardizes the fault of main transformer safe operation.As broken down, send action command, main transformer is excised by system, to ensure main transformer safety, prevent main transformer from damaging or making failure propagation.
C, electric capacity are protected: 10 kilovolts of building-out capacitors are also voltage, protection, according to voltage, current effective value that sampling obtains, differentiate whether electric capacity has fault or system operational parameters entail dangers to capacitive safety.Then send action command if any fault, capacitor is excised by system, with anti-tamper electric capacity or make failure propagation.
D, distribution become protection: the distribution for Y/Y0 connection becomes or station becomes; according to original edge voltage, electric current that sampling obtains; former, pay limit zero-sequence current and the signal such as gas, temperature, differentiate whether transformer itself breaks down, whether short circuit or the overload of outside, its pair of limit.As broken down then according to fault severity level, instantaneous or time delay disconnects former limit circuit breaker, is excised by transformer by system, in order to avoid damage transformer or make transformer fault expand.
E, motor protection: the operational factor such as motor voltage, mains side electric current and zero-sequence current obtained according to sampling, differentiate whether motor is short-circuited, overload, stall and fault or the abnormal operating condition such as operating voltage is too low.As broken down, then according to the order of severity of fault, time delay or instantaneous by motor excision, to ensure the safety of motor.
F, motor main protection: the information such as the motor voltage obtained according to sampling, mains side and neutral point current, residual voltage, zero-sequence current, exciting voltage, exciting current; differentiate whether motor itself stator or rotor windings short-circuit or ground connection occur, and whether the abnormal operating condition such as overload, loss of excitation, excitation unit fault or step-out occur.As occurred, then according to the extent of injury of fault to motor, instantaneous or time delay disjunction motor main circuit breaker and field switch, to ensure the safety of motor.
Four, control principle
This device, according to different control object, is designed with the automatic control functions such as automatic low-frequency load reduction, small current earthing wire-selecting, overload warning and separating brake, bus overvoltage, voltage transformer disconnection warning respectively.
The carrying out judgement system according to the parameter such as system running current, busbar voltage, residual voltage, zero-sequence current being all device collection and whether normally run of various controlling functions, whether equipment has fault.As there is the fault such as single-phase earthing or voltage transformer disconnection, then first report to the police.During single-phase earthing, ground path should be excised through time delay.As system operational parameters parameter exceedes allowed band, then send alarm signal, and can separating brake be set; When operational factor is recovered normal, automatic closing also can be set to restore electricity.
Claims (4)
1. the implementation method of an automation of transformation substations integrated protection, it is characterized in that: A, to realize with integrated automation device, this device comprises the primary module be made up of single-chip microcomputer, be provided with the input module of alternating current, voltage signal converter, comprise drive circuit, divide-shut brake controls, divide-shut brake monitors, anti-jump loop, controls the output module of power supply monitoring circuit, power module and the administration module be made up of single-chip microcomputer; Described administration module is connected with described primary module through singlechip serial communication, described input module, output module, and power module is connected with described primary module by substrate;
B, its implementation are:
One, route protection: the electric current obtained according to sampling, the effective value of voltage signal, phase relation and protection seting value, relaying configuration differentiate whether this circuit or adjacent lines jeopardize the fault of this line facility safety, as occurred, then according to the order of severity of fault, instantaneous or time delay sends action command, faulty component is excised, to ensure the safety of system and this line facility;
Two, main transformer protection: according to effective value, switch state signal and protection seting value, the relaying configuration such as phase relation and main transformer gas, temperature of main transformer high and low pressure side electric current, voltage, differentiate whether main transformer self breaks down and whether system jeopardizes the fault of main transformer safe operation, as broken down, send action command, main transformer is excised by system, to ensure main transformer safety, prevent main transformer from damaging or making failure propagation;
Three, electric capacity protection: the voltage, the current effective value that obtain according to sampling, differentiate whether electric capacity has fault or system operational parameters whether entail dangers to capacitive safety, then send action command if any fault, capacitor is excised by system, with anti-tamper electric capacity or make failure propagation;
Four, distribution becomes protection: the distribution for Y/Y0 connection becomes or station becomes, according to original edge voltage, electric current that sampling obtains, former, pair limit zero-sequence current and the signal such as gas, temperature, differentiate whether transformer itself breaks down, whether short circuit or the overload of outside, its pair of limit, as broken down then according to fault severity level, instantaneous or time delay disconnects former limit circuit breaker, transformer is excised by system, in order to avoid damage transformer or make transformer fault expand;
Five, motor protection: according to operational factors such as motor voltage, mains side electric current and zero-sequence currents that sampling obtains, differentiate whether motor is short-circuited, overload, stall and fault or the abnormal operating condition such as operating voltage is too low, as broken down, then according to the order of severity of fault, time delay or instantaneous by motor excision, to ensure the safety of motor;
Six, motor main protection: the information such as the motor voltage obtained according to sampling, mains side and neutral point current, residual voltage, zero-sequence current, exciting voltage, exciting current; differentiate whether motor itself stator or rotor windings short-circuit or ground connection occur; whether there is the abnormal operating condition such as overload, loss of excitation, excitation unit fault or step-out; as occurred; then according to the extent of injury of fault to motor; instantaneous or time delay disjunction motor main circuit breaker and field switch, to ensure the safety of motor.
2. the implementation method of automation of transformation substations integrated protection according to claim 1, is characterized in that: the single-chip microcomputer of described primary module is 16 embedded 87C196NT single-chip microcomputers.
3. the implementation method of automation of transformation substations integrated protection according to claim 1 and 2, is characterized in that: described power module is switching power supply.
4. the implementation method of automation of transformation substations integrated protection according to claim 1 and 2, is characterized in that: the single-chip microcomputer of described administration module is embedded 89C51RD+ single-chip microcomputer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410275092.4A CN104659760A (en) | 2014-06-19 | 2014-06-19 | Method for realizing automatic comprehensive protection of transformer substation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410275092.4A CN104659760A (en) | 2014-06-19 | 2014-06-19 | Method for realizing automatic comprehensive protection of transformer substation |
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| CN104659760A true CN104659760A (en) | 2015-05-27 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112018621A (en) * | 2020-09-07 | 2020-12-01 | 山东臣乔电气科技股份有限公司 | Intelligent control system of power switch cabinet |
| CN112394661A (en) * | 2019-11-04 | 2021-02-23 | 杨健 | Low-delay intelligent controller for pipe network system |
| CN112491040A (en) * | 2020-11-20 | 2021-03-12 | 上海电力设计院有限公司 | Automatic switching device for standby power supply line of superconducting cable and operation method thereof |
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| CN2309001Y (en) * | 1997-07-24 | 1999-02-24 | 陈家山 | One-chip computer field monitor for transformer substation |
| CN2729981Y (en) * | 2004-08-20 | 2005-09-28 | 上海久创电气自动化设备有限公司 | Digital comprehensive protector |
| EP1692755A2 (en) * | 2003-11-03 | 2006-08-23 | Abb Research Ltd. | Automated intelligent configuration tool for power system protection and control and monitoring devices |
| CN202134959U (en) * | 2011-06-23 | 2012-02-01 | 保定和易法电气科技有限公司 | Intelligent protective device for substation in rural power network |
| CN103715665A (en) * | 2013-12-20 | 2014-04-09 | 柳州腾龙煤电科技股份有限公司 | Mining-used low-voltage switch comprehensive protector |
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2014
- 2014-06-19 CN CN201410275092.4A patent/CN104659760A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2309001Y (en) * | 1997-07-24 | 1999-02-24 | 陈家山 | One-chip computer field monitor for transformer substation |
| EP1692755A2 (en) * | 2003-11-03 | 2006-08-23 | Abb Research Ltd. | Automated intelligent configuration tool for power system protection and control and monitoring devices |
| CN2729981Y (en) * | 2004-08-20 | 2005-09-28 | 上海久创电气自动化设备有限公司 | Digital comprehensive protector |
| CN202134959U (en) * | 2011-06-23 | 2012-02-01 | 保定和易法电气科技有限公司 | Intelligent protective device for substation in rural power network |
| CN103715665A (en) * | 2013-12-20 | 2014-04-09 | 柳州腾龙煤电科技股份有限公司 | Mining-used low-voltage switch comprehensive protector |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112394661A (en) * | 2019-11-04 | 2021-02-23 | 杨健 | Low-delay intelligent controller for pipe network system |
| CN112018621A (en) * | 2020-09-07 | 2020-12-01 | 山东臣乔电气科技股份有限公司 | Intelligent control system of power switch cabinet |
| CN112491040A (en) * | 2020-11-20 | 2021-03-12 | 上海电力设计院有限公司 | Automatic switching device for standby power supply line of superconducting cable and operation method thereof |
| CN112491040B (en) * | 2020-11-20 | 2024-04-12 | 上海电力设计院有限公司 | Automatic switching device for backup power line of superconducting cable and operation method thereof |
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