CN104538932A - Relay protection configuration method suitable for single auxiliary machine configuration - Google Patents
Relay protection configuration method suitable for single auxiliary machine configuration Download PDFInfo
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- CN104538932A CN104538932A CN201510020602.8A CN201510020602A CN104538932A CN 104538932 A CN104538932 A CN 104538932A CN 201510020602 A CN201510020602 A CN 201510020602A CN 104538932 A CN104538932 A CN 104538932A
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- protection
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- longitudinal differential
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Abstract
The invention discloses a relay protection configuration method suitable for single auxiliary machine configuration. According to the relay protection configuration method, influences of maloperation or miss tripping of measurement elements or protection devices on an engine are avoided to the maximum degree, and the operation reliability and the operation economical efficiency of a power plant are improved. According to the relay protection configuration method suitable for single auxiliary machine configuration, three main protection devices and a plurality of backup protection devices are installed, the three main protection devices include the current quick break protection device, the current longitudinal differential protection device and the magnetic balance longitudinal differential protection device, and the backup protection devices include the negative sequence overcurrent protection device, the zero sequence overcurrent protection device, the engine over-heating protection device, the starting time and rotation-clogging protection device, the engine overcurrent protection device and the overload protection device. Choose-two-from-three logic judgment is carried out on the movement amount of the three main protection devices, movement is carried out only when at least two of three signals are movement signals, and movement is not carried out when at least two of the three signals are the movement signals.
Description
Technical field
The invention belongs to the technical field of protecting electrical power system configuration, relate to a kind of relay protection configuration method being applicable to the configuration of single subsidiary engine particularly.
Background technology
At home in 300MW and above big power station unit, boiler all adopts bi serie blower fan configuration mode, along with the progress of China's generation technology and the raising of subsidiary engine manufacture level, the availability factor of state's inner blower is more and more higher, for boiler adopts the configuration of single series blower fan to create condition.The more single-row configuration of boiler accessory machinery biserial configuration generating reliability is higher, but single-row configuration is higher than biserial configuration operation efficiency, and save equipment investment, Some Domestic power plant starts to adopt single-row configuration.Subsidiary engine configuration becomes single-row from biserial and simplifies therrmodynamic system, and the thermal control equipment such as supporting lash adjustment, temperature detection and the fire alarm system speed detection system of the various thermal control device air preheaters of the actuator of matched with blower, vibration pressure differential pressure, temperature-detecting device petrol station and instrument are reduced to 1 cover by 2 covers.
Subsidiary engine configuration become single-row from biserial, the single-row configuration of subsidiary engine decreases number of devices, but subsidiary engine is single-row be configured to after, single device fault can cause compressor emergency shutdown, and therefore, the single-row configuration of subsidiary engine is had higher requirement to relaying configuration and control.
Summary of the invention
Technology of the present invention is dealt with problems and is: overcome the deficiencies in the prior art; a kind of relay protection configuration method being applicable to the configuration of single subsidiary engine is provided; it farthest avoids, because the malfunction of measuring component or protective device or tripping have an impact to motor, improving operational reliability and the economy of power plant.
Technical solution of the present invention is: this relay protection configuration method being applicable to the configuration of single subsidiary engine, installing three is overlapped main protection equipment and overlaps backup protection equipment more, three cover main protection equipments are current fault-clearing protective relays, electric current longitudinal differential protection device, magnetic balance longitudinal differential protection device, and backup protection equipment comprises negative phase-sequence overcurrent protective device, zero-sequencedirectional protection device, motor protection against overheat device, start-up time and rotation-clogging protection device, motor overcurrent protective device, overload protection device; Carry out three according to the actuating quantity of three main protection equipments and select two Logic judgment, in three signals, at least two are just carried out action for during actuating signal, otherwise, be failure to actuate.
The present invention adopts configuration to overlap protection more, carry out the basic principle that three select two Logic judgment, farthest avoids because the malfunction of measuring component or protective device or tripping have an impact to motor, the operational reliability of raising power plant and economy.
Accompanying drawing explanation
Fig. 1 shows three of the relay protection configuration method of single subsidiary engine configuration that is applicable to according to the present invention and selects two Logic judgment.
Embodiment
This relay protection configuration method being applicable to the configuration of single subsidiary engine, installing three is overlapped main protection equipment and overlaps backup protection equipment more, three cover main protection equipments are current fault-clearing protective relays, electric current longitudinal differential protection device, magnetic balance longitudinal differential protection device, and backup protection equipment comprises negative phase-sequence overcurrent protective device, zero-sequencedirectional protection device, motor protection against overheat device, start-up time and rotation-clogging protection device, motor overcurrent protective device, overload protection device (can not select under-voltage protection); Carry out three according to the actuating quantity of three main protection equipments and select two Logic judgment, in three signals, at least two are just carried out action for during actuating signal, otherwise, be failure to actuate.
The present invention adopts configuration to overlap protection more, carry out the basic principle that three select two Logic judgment, farthest avoids because the malfunction of measuring component or protective device or tripping have an impact to motor, the operational reliability of raising power plant and economy.
Preferably, independent current transformer is installed to detect size of current at motor outlet place, for current fault-clearing protective relays provides measured value.
Preferably, respectively optical current mutual inductor is installed at motor outlet place and neutral point place, the electric current of measurement is imported in longitudinal differential protection device.
Preferably, magnetic balance longitudinal differential protection device utilizes the layout of motor inlet wire and neutral point line to realize magnetic balance longitudinal differential protection.
Preferably; respectively current quick action outlet signal, longitudinal differential protection action outlet signal, magnetic balance differential protection action outlet signal are introduced in processing unit; carry out three and select two Logic judgment (as shown in Figure 1), judged result is transferred to action element as actuating signal.
The above; it is only preferred embodiment of the present invention; not any pro forma restriction is done to the present invention, every above embodiment is done according to technical spirit of the present invention any simple modification, equivalent variations and modification, all still belong to the protection range of technical solution of the present invention.
Claims (5)
1. one kind is applicable to the relay protection configuration method of single subsidiary engine configuration, it is characterized in that: installing three is overlapped main protection equipment and overlaps backup protection equipment more, three cover main protection equipments are current fault-clearing protective relays, electric current longitudinal differential protection device, magnetic balance longitudinal differential protection device, and backup protection equipment comprises negative phase-sequence overcurrent protective device, zero-sequencedirectional protection device, motor protection against overheat device, start-up time and rotation-clogging protection device, motor overcurrent protective device, overload protection device; Carry out three according to the actuating quantity of three main protection equipments and select two Logic judgment, in three signals, at least two are just carried out action for during actuating signal, otherwise, be failure to actuate.
2. the relay protection configuration method being applicable to the configuration of single subsidiary engine according to claim 1, is characterized in that: install independent current transformer at motor outlet place to detect size of current, for current fault-clearing protective relays provides measured value.
3. the relay protection configuration method being applicable to the configuration of single subsidiary engine according to claim 2, is characterized in that: install optical current mutual inductor respectively at motor outlet place and neutral point place, imported in longitudinal differential protection device by the electric current of measurement.
4. the relay protection configuration method being applicable to the configuration of single subsidiary engine according to claim 3, is characterized in that: magnetic balance longitudinal differential protection device utilizes the layout of motor inlet wire and neutral point line to realize magnetic balance longitudinal differential protection.
5. the relay protection configuration method being applicable to the configuration of single subsidiary engine according to claim 4; it is characterized in that: respectively current quick action outlet signal, longitudinal differential protection action outlet signal, magnetic balance differential protection action outlet signal are introduced in processing unit; carry out three and select two Logic judgment, judged result is transferred to action element as actuating signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510020602.8A CN104538932B (en) | 2015-01-15 | 2015-01-15 | A kind of relay protection configuration method suitable for the configuration of single subsidiary engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510020602.8A CN104538932B (en) | 2015-01-15 | 2015-01-15 | A kind of relay protection configuration method suitable for the configuration of single subsidiary engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104538932A true CN104538932A (en) | 2015-04-22 |
| CN104538932B CN104538932B (en) | 2019-11-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510020602.8A Active CN104538932B (en) | 2015-01-15 | 2015-01-15 | A kind of relay protection configuration method suitable for the configuration of single subsidiary engine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018024190A1 (en) * | 2016-08-02 | 2018-02-08 | 南京南瑞继保电气有限公司 | Rapid protection system |
Citations (3)
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|---|---|---|---|---|
| CA2136341C (en) * | 1992-05-22 | 1998-11-24 | Murari Mohan Saha | Method and device for preventing understabilization of longitudinal differential protection in case of external fault and current transformer saturation |
| CN103812086A (en) * | 2014-02-28 | 2014-05-21 | 中国能源建设集团广东省电力设计研究院 | High voltage electromotor protection system |
| CN104009452A (en) * | 2014-05-29 | 2014-08-27 | 天津大学 | Protection scheme for direct current distribution system short-circuit fault |
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2015
- 2015-01-15 CN CN201510020602.8A patent/CN104538932B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2136341C (en) * | 1992-05-22 | 1998-11-24 | Murari Mohan Saha | Method and device for preventing understabilization of longitudinal differential protection in case of external fault and current transformer saturation |
| CN103812086A (en) * | 2014-02-28 | 2014-05-21 | 中国能源建设集团广东省电力设计研究院 | High voltage electromotor protection system |
| CN104009452A (en) * | 2014-05-29 | 2014-08-27 | 天津大学 | Protection scheme for direct current distribution system short-circuit fault |
Non-Patent Citations (3)
| Title |
|---|
| 何智康: "发电厂大型电动机特殊保护配置及整定计算方法的研究及讨论", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑（月刊）》 * |
| 周世杰: "辅机单列配置采取的热工控制及保护措施", 《发电设备》 * |
| 袁伟芳: "3800kW高压电动机的继电保护配置", 《电气应用》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018024190A1 (en) * | 2016-08-02 | 2018-02-08 | 南京南瑞继保电气有限公司 | Rapid protection system |
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| CN104538932B (en) | 2019-11-19 |
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