CN104466925B - A kind of micro-capacitance sensor route protection algorithm based on disturbance voltage amount - Google Patents
A kind of micro-capacitance sensor route protection algorithm based on disturbance voltage amount Download PDFInfo
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Abstract
The present invention relates to the line protection method of micro-capacitance sensor, specially a kind of micro-capacitance sensor route protection algorithm based on disturbance voltage amount, comprise the following steps for：Step one：Three-phase terminal voltage is detected using standard potential transformer；Step 2：By Park Transformation, alternating voltage quantitative change is changed into DC quantity；Step 3：By DC quantity and a reference signalU qref Compare, obtain disturbance voltageV e ；Step 4：According to the size of micro-capacitance sensor disturbance voltage, time delay sends trip command.Algorithm proposed by the present invention fully takes into account the operation characteristic of micro-capacitance sensor, improves the Reliability of Microprocessor of micro-capacitance sensor protection, is a kind of very promising micro-capacitance sensor route protection algorithm.
Description
Technical field
The present invention relates to the line protection method of micro-capacitance sensor, specially a kind of micro-capacitance sensor circuit based on disturbance voltage amount is protected
Shield algorithm.
Background technology
With the fast development of Chinese national economy, electricity needs is increased rapidly, and power grid construction paces are increasingly accelerated.But
Also increasingly manifest as power network scale constantly expands, the drawbacks of ultra-large power system：High cost, loss is big, runs difficulty
Greatly, it is difficult to meet user to the higher and higher requirement of the aspects such as Supply Security, reliability.Additionally, traditional power network disappears in large quantities
The energy based on coal is consumed, with the continuous lifting that the constant tension of energy supply and conservation culture are realized, micro-capacitance sensor starts to draw
Enter to power system.
After distributed power source accesses distribution network system, the topological structure of legacy network is changed, make the complicated network structure many
Become, the trend distribution, the size of fault current and flow direction in network can change, and then influence to be protected in conventional electrical distribution net
Cooperation between equipment.Distribution net work structure containing micro-capacitance sensor is complicated and changeable, and network structure usually includes multiple branch roads, wherein one
One or more micro-capacitance sensors or micro battery are connected on partial branch.This cause the distribution protection system containing micro-capacitance sensor must be by
Multiple protection node is by communication link, and coupling between the two protection nodes used with traditional power distribution network is
Different.
Nowadays, substantial amounts of new energy is all linked into micro-capacitance sensor by power electronic equipment.In order to protect these electric power electricity
Sub- equipment, adds many saturation blocks so that when system jam, will not produce very big short circuit current, passes
The power distribution network overcurrent protection of system is not applied for micro-capacitance sensor, it is necessary to study the new relay protective plan suitable for micro-capacitance sensor.
The content of the invention
The present invention is in order to solve the problems, such as that traditional power distribution network overcurrent protection can not be protected to micro-capacitance sensor, there is provided one
Plant the micro-capacitance sensor route protection algorithm based on disturbance voltage amount.
The present invention adopts the following technical scheme that realization：A kind of micro-capacitance sensor route protection based on disturbance voltage amount is calculated
Method, comprises the following steps：
S1：The three-phase terminal voltage U of micro-capacitance sensor is detected using voltage transformera、UbAnd Uc；
S2：The three-phase terminal voltage U measured in S1a、UbAnd UcBy Park Transformation in protective relaying device, dq is transformed into
DC quantity U under two-phase rotating coordinate systemdr、Uqr；
S3：The U that S2 conversion is obtainedqrWith reference signal UqrefCompare, obtain disturbance voltage Ve, Ve=Uqr-Uqref,
UqrefIt is the U under micro-capacitance sensor normal operational conditionqr；
S4：As micro-capacitance sensor disturbance voltage VeMaximum VemaxMeetWhen, protective relaying device 1s
After send trip command, as micro-capacitance sensor disturbance voltage VeMaximum VemaxMeetWhen, relay protection dress
Trip command is sent after setting to 0 .5s, as micro-capacitance sensor disturbance voltage VeMaximum VemaxMeetWhen, relay is protected
Trip command is sent after protection unit 0.2s, E is the amplitude of terminal voltage.
Traditional current protection algorithm because the two-way flow of electric current cannot be used in micro-capacitance sensor, protect by traditional low-voltage
Shield or overvoltage protection can only set single setting valve, it is impossible to which the serious conditions according to failure correspond to knot of handling it respectively
Really.The protection algorism of present invention design, reference voltage during according to the magnitude of voltage for measuring with normal operation is contrasted, it is determined that therefore
The serious Chengdu of barrier, and delay tripping instruction is sent according to disturbed value, to improve the stability of system operation.Meanwhile, the present invention
Method contrasted using quadrature axis DC component, the AC compounent of system asymmetrical three-phase is transformed to by list by Park Transformation
One DC component carries out comparing calculation, enormously simplify difficulty in computation, improves the sensitivity of protective relaying device.
Specific embodiment
A kind of micro-capacitance sensor route protection algorithm based on disturbance voltage amount, comprises the following steps：
S1：The three-phase terminal voltage U of micro-capacitance sensor is detected using voltage transformera、UbAnd Uc；
S2：The three-phase terminal voltage U measured in S1a、UbAnd UcBy Park Transformation in protective relaying device, dq is transformed into
DC quantity U under two-phase rotating coordinate systemdr、Uqr；
S3：The U that S2 conversion is obtainedqrWith reference signal UqrefCompare, obtain disturbance voltage Ve, Ve=Uqr-Uqref,
UqrefIt is the U under micro-capacitance sensor normal operational conditionqr；
S4：As micro-capacitance sensor disturbance voltage VeMaximum VemaxMeetWhen, after relay protector 1s
Trip command is sent, as micro-capacitance sensor disturbance voltage VeMaximum VemaxMeetWhen, protective relaying device
Trip command is sent after 0.5s, as micro-capacitance sensor disturbance voltage VeMaximum VemaxMeetWhen, relay protection
Trip command is sent after device 0.2s, E is the amplitude of terminal voltage.
Claims (1)
1. a kind of micro-capacitance sensor route protection algorithm based on disturbance voltage amount, it is characterised in that comprise the following steps：
S1：The three-phase terminal voltage U of micro-capacitance sensor is detected using voltage transformera、UbAnd Uc；
S2：The three-phase terminal voltage U measured in S1a、UbAnd UcBy Park Transformation in protective relaying device, dq two-phases are transformed into
DC quantity U under rotating coordinate systemdr、Uqr；
S3：The U that S2 conversion is obtainedqrWith reference signal UqrefCompare, obtain disturbance voltage Ve, Ve=Uqr-Uqref, UqrefFor
U under micro-capacitance sensor normal operational conditionqr；
S4：As micro-capacitance sensor disturbance voltage VeMaximum VemaxMeetWhen, sent out after protective relaying device 1s
Go out trip command, as micro-capacitance sensor disturbance voltage VeMaximum VemaxMeetWhen, protective relaying device
Trip command is sent after 0.5s, as micro-capacitance sensor disturbance voltage VeMaximum VemaxMeetWhen, relay protection
Trip command is sent after device 0.2s, E is the amplitude of terminal voltage.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410743513.1A CN104466925B (en) | 2014-12-08 | 2014-12-08 | A kind of micro-capacitance sensor route protection algorithm based on disturbance voltage amount |
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| CN201410743513.1A CN104466925B (en) | 2014-12-08 | 2014-12-08 | A kind of micro-capacitance sensor route protection algorithm based on disturbance voltage amount |
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| CN104466925A CN104466925A (en) | 2015-03-25 |
| CN104466925B true CN104466925B (en) | 2017-06-06 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106124930A (en) * | 2016-06-24 | 2016-11-16 | 华北水利水电大学 | A kind of micro-capacitance sensor fault detection method based on differential voltage and device |
| CN106849031B (en) * | 2017-04-06 | 2019-01-22 | 华北电力大学 | A kind of alternating current-direct current mixing micro-capacitance sensor coordinating protection fitting method |
| CN108110738B (en) * | 2017-12-19 | 2019-06-04 | 北京天诚同创电气有限公司 | Method, relay and system for micro-capacitance sensor protection |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102055368A (en) * | 2010-12-20 | 2011-05-11 | 江苏省电力公司南京供电公司 | 100-KVA micro-grid energy storage bidirectional converter |
| CN202084950U (en) * | 2011-04-19 | 2011-12-21 | 河南电力试验研究院 | Device for detecting generation of island in micro power grid system |
| CN103701106A (en) * | 2013-12-11 | 2014-04-02 | 清华大学 | Relay protection method applied to micro-grid |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP5075539B2 (en) * | 2007-09-05 | 2012-11-21 | 株式会社東芝 | Wide area protection control measurement system and method |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102055368A (en) * | 2010-12-20 | 2011-05-11 | 江苏省电力公司南京供电公司 | 100-KVA micro-grid energy storage bidirectional converter |
| CN202084950U (en) * | 2011-04-19 | 2011-12-21 | 河南电力试验研究院 | Device for detecting generation of island in micro power grid system |
| CN103701106A (en) * | 2013-12-11 | 2014-04-02 | 清华大学 | Relay protection method applied to micro-grid |
Non-Patent Citations (1)
| Title |
|---|
| 微电网动态电压恢复器运行模式研究;成瑞芬等;《电网技术》;20130331;第37卷(第3期);第610-615页 * |
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