CN101741061A - Distribution transformer medium voltage low voltage integration protection method - Google Patents
Distribution transformer medium voltage low voltage integration protection method Download PDFInfo
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- CN101741061A CN101741061A CN200810181082A CN200810181082A CN101741061A CN 101741061 A CN101741061 A CN 101741061A CN 200810181082 A CN200810181082 A CN 200810181082A CN 200810181082 A CN200810181082 A CN 200810181082A CN 101741061 A CN101741061 A CN 101741061A
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- distribution transformer
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- mesolow
- protective device
- transformer
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Abstract
The invention discloses a distribution transformer medium voltage low voltage integration protection method. The current signal and voltage signal at the inlet wire side of distribution transformer and the outlet wire side of low voltage circuit breaker are input into a medium voltage low voltage integration distribution transformer protecting device, and the medium voltage low voltage integration distribution transformer protecting device is in charge of controlling tripping/switching in of medium voltage circuit breaker and low voltage circuit breaker. Compared with the existing distribution transformer protection method, the method has the advantages that electric secondary wiring connection relationship is simplified, and reliability, sensitivity and rapidity of distribution transformer protection are enhanced.
Description
Affiliated a kind of distribution transformer mesolow of technical field the present invention integration protection method; it is input in the integrated distribution transformer protective device of mesolow by current signal, voltage signal with distribution transformer inlet wire side and low-voltage circuit breaker outlet side; tripping operation/combined floodgate by integrated distribution transformer protective device control medium voltage breaker of mesolow and low-voltage circuit breaker; to reach the purpose of protection distribution transformer and line related thereof, belong to power system automatic field.
The background technology distribution transformer be a kind of be the power transformer of 400V low pressure with 6kV～35kV medium voltage transformation; the distribution transformer protection system is normally installed medium voltage breaker and distribution transformer protective device in the inlet wire side of distribution transformer; in the outlet side of distribution transformer the low-voltage circuit breaker of internal insertee control unit is installed, between the low-voltage circuit breaker of distribution transformer protective device and internal insertee control unit, is utilized switching value signal or signal of communication to implement region linkage protection.
Fig. 1 is the line chart of existing distribution transformer protection system, and it is made up of medium voltage breaker 104, distribution transformer protective device 103, current transformer 106, voltage transformer 109, distribution transformer 111, low-voltage circuit breaker 115 (in the frame of broken lines).Wherein low-voltage circuit breaker 115 comprises embedded control unit 118, embedded circuit breaker 116, embedded current transformer 119 and embedded voltage transformer 121.
The electric primary connection annexation of line chart shown in Figure 1 is: press bus 102 to be connected to the end of incoming cables of medium voltage breaker 104 in middle pressure 101 warps of 6kV～35kV, press bus 108 to be connected to the end of incoming cables of distribution transformer 111 in the leading-out terminal warp of medium voltage breaker 104.After the middle pressure 101 of 6kV～35kV is transformed to the low pressure of 400V through distribution transformer 111, be connected to the end of incoming cables of embedded circuit breaker 116 by the leading-out terminal of distribution transformer 111 through bus 112, the leading-out terminal of embedded circuit breaker 116 is connected to the 400V low-voltage electrical appliance by low-voltage bus bar 123.
The electric secondary wiring annexation of line chart shown in Figure 1 is: the tripping operation of distribution transformer protective device 103 and energization control signal are imported control end by tripping operation and combined floodgate circuit that bundle conductor 105 is connected respectively to medium voltage breaker 104, the tripping operation and the combined floodgate of control medium voltage breaker 104.In press electric current on the bus 108 by current transformer 106 conversion after bundle conductor 107 be input in the distribution transformer protective device 103; in press voltage on the bus 108 by voltage transformer 109 conversion after bundle conductor 110 be input in the distribution transformer protective device 103, for distribution transformer protective device 103 diagnosis distribution transformers 111 and line related thereof the usefulness that whether breaks down.The tripping operation of embedded control unit 118 and energization control signal are imported control end by tripping operation and combined floodgate circuit that bundle conductor 117 is connected to circuit breaker 116,116 tripping operations of control circuit breaker and combined floodgate.After bundle conductor 120 is input in the embedded control unit 118, the voltage on the low-voltage bus bar 123 supplies tracing trouble to use by embedded voltage transformer 121 conversion after bundle conductor 122 is input to electric current on the low-voltage bus bar 123 in the embedded control unit 118 by embedded current transformer 119 conversion.The status signal of embedded control unit 118 is input in the distribution transformer protective device 103 by wire harness 113; the status signal of distribution transformer protective device 103 is input in the embedded control unit 118 by bundle conductor 114, realizes the region linkage protection between distribution transformer protective device 103 and the embedded control unit 118.
The electric secondary wiring course of work of line chart shown in Figure 1 is: diagnose out distribution transformer 111 and line related thereof according to the electric current that transmits and information of voltage when distribution transformer protective device 103 from current transformer 106 and voltage transformer 109 and break down after the information; distribution transformer protective device 103 is by 104 tripping operations of bundle conductor 105 control medium voltage breakers; distribution transformer protective device 103 information that will trip are sent in the embedded control unit 118 by bundle conductor 114 simultaneously; embedded control unit 118 is controlled embedded circuit breaker 116 tripping operations according to after the information of receiving according to Design Mode.Diagnosing out distribution transformer 111 and line related thereof according to the electric current that transmits and information of voltage when embedded control unit 118 from embedded current transformer 119 and embedded voltage transformer 121 breaks down after the information; embedded control unit 118 is by 116 tripping operations of bundle conductor 117 control circuit breakers; embedded control unit 118 information that will trip is sent in the distribution transformer protective device 103 by bundle conductor 113 simultaneously; distribution transformer protective device 103 is according to after the information of receiving, according to 104 tripping operations of setting program control medium voltage breaker.
In the described existing distribution transformer protection of Fig. 1; when distribution transformer 111 and line related thereof break down; the medium voltage breaker 104 and the program punctual cascading trip of the circuit breaker 116 that is installed in distribution transformer 111 outlet sides of distribution transformer 111 inlet wire sides need be installed in, the further expansion of fault could be stoped according to setting.Because distribution transformer protective device 103 is what to be separated with embedded control unit 118, adopt switching value signal or signal of communication implementation information mutual between them.Owing to have high voltage and big electric current around the distribution transformer; its electromagnetic environment is very abominable; therefore between distribution transformer protective device 103 and embedded control unit 118, no matter be that employing switching value signal or signal of communication implementation information are mutual, all be difficult to the punctual mutual of guarantee information.Information between distribution transformer protective device 103 and embedded control unit 118 can not realize punctual mutual; must cause medium voltage breaker 104 and circuit breaker 116 can not realize consequently can not stoping the further expansion of fault according to the punctual cascading trip of setting of program.
Summary of the invention is in order to overcome the deficiency of existing method, and the present invention implements the distribution transformer protection by designing the integrated distribution transformer protective device of a kind of mesolow.
The technical solution adopted in the present invention is: the tripping operation of the present invention by designing a kind of current signal that receives distribution transformer inlet wire side and outlet side simultaneously, voltage signal and control simultaneously and be installed in the medium voltage breaker of distribution transformer inlet wire side/close a floodgate and the integrated distribution transformer protective device of mesolow that is installed in the tripping operation/combined floodgate of outlet side low-voltage circuit breaker are implemented the distribution transformer interlock protection.
Compare with existing method; a kind of distribution transformer mesolow integration protection method; the integrated distribution transformer protective device of mesolow that is installed in the tripping operation of the medium voltage breaker of distribution transformer inlet wire side/close a floodgate and is installed in the tripping operation/combined floodgate of outlet side low-voltage circuit breaker by a kind of current signal that can receive distribution transformer inlet wire side and outlet side simultaneously, voltage signal and control is simultaneously implemented the interlock protection of distribution transformer.This method has been eliminated the information interaction between middle pressure protective device and the low-voltage circuit breaker control unit, has improved the punctuality that is installed in distribution transformer inlet wire side and outlet side circuit breaker cascading trip.When distribution transformer and line related thereof break down; the integrated distribution transformer protective device of mesolow makes medium voltage breaker that is installed in distribution transformer inlet wire side and the low-voltage circuit breaker that is installed in distribution transformer outlet side stop the further expansion of fault effectively according to the punctual cascading trip of setting of program.
The invention has the beneficial effects as follows: the inherent characteristic of having inherited existing distribution transformer guard method; improved medium voltage breaker that is installed in distribution transformer inlet wire side and the low-voltage circuit breaker that is installed in distribution transformer outlet side punctuality, stoped the further expansion of fault effectively according to the program cascading trip of setting.
The present invention is further described below in conjunction with drawings and Examples for description of drawings.
Fig. 2 is the present invention's " a kind of distribution transformer mesolow integration protection method " line chart.
Fig. 3 is the present invention's " a kind of distribution transformer mesolow integration protection method " the integrated distribution transformer protective device of embodiment mesolow cut-away view.
Embodiment
Fig. 2 is the line chart of the present invention's " a kind of distribution transformer mesolow integration protection method ", and it is made up of medium voltage breaker 204, the integrated distribution transformer protective device 203 of mesolow, current transformer 206, voltage transformer 209, distribution transformer 211, low-voltage circuit breaker 216, current transformer 217 and voltage transformer 218.With respect to line chart shown in Figure 1, because low-voltage circuit breaker 216 does not contain control unit, if low-voltage circuit breaker 216 does not contain current transformer and voltage transformer yet, then current transformer 217 and voltage transformer 218 need external.
The electric primary connection annexation of line chart shown in Figure 2 is: press bus 202 to be connected to the end of incoming cables of medium voltage breaker 204 in middle pressure 201 warps of 6kV～35kV, press bus 208 to be connected to the end of incoming cables of distribution transformer 211 in the leading-out terminal warp of medium voltage breaker 204; After the middle pressure 201 of 6kV～35kV is transformed to the low pressure of 400V through distribution transformer 211, be connected to the end of incoming cables of low-voltage circuit breaker 216 by the leading-out terminal of distribution transformer 211 through bus 212, the leading-out terminal of low-voltage circuit breaker 216 is connected to the 400V low-voltage electrical appliance by low-voltage bus bar 219.
The electric secondary wiring annexation of line chart shown in Figure 2 is: the middle pressure tripping operation and the energization control signal of the integrated distribution transformer protective device 203 of mesolow are imported control end by tripping operation and combined floodgate circuit that bundle conductor 205 is connected respectively to medium voltage breaker 204, the tripping operation and the combined floodgate of control medium voltage breaker 204; The low-voltage tripping of the integrated distribution transformer protective device 203 of mesolow and energization control signal are imported control end by tripping operation and combined floodgate circuit that bundle conductor 213 is connected respectively to low-voltage circuit breaker 216, the tripping operation and the combined floodgate of control low-voltage circuit breaker 216.In press electric current on the bus 208 by current transformer 206 conversion after bundle conductor 207 be input in the integrated distribution transformer protective device 203 of mesolow, the voltage on the middle pressure bus 208 by voltage transformer 209 conversion after bundle conductor 210 be input in the integrated distribution transformer protective device 203 of mesolow; Electric current on the low-voltage bus bar 219 by current transformer 217 conversion after bundle conductor 215 be input in the integrated distribution transformer protective device 203 of mesolow, the voltage on the low-voltage bus bar 219 by voltage transformer 218 conversion after bundle conductor 214 be input in the integrated distribution transformer protective device 203 of mesolow.
The electric secondary wiring course of work of line chart shown in Figure 2 is: whether the distribution transformer 211 inlet wire sides that the integrated distribution transformer protective device 203 of mesolow transmits according to current transformer 206, voltage transformer 209, current transformer 217, voltage transformer 218 and the electric current of distribution transformer 211 outlet sides and information of voltage diagnosis distribution transformer and line related thereof break down.When the integrated distribution transformer protective device 203 of mesolow diagnoses out distribution transformer and line related thereof to break down; the integrated distribution transformer protective device 203 of mesolow will be realized the region linkage protection by program control medium voltage breaker of setting 204 and low-voltage circuit breaker 216 tripping operations according to the type of fault, to stop the further expansion of fault.
Fig. 3 is the integrated distribution transformer protective device of the mesolow cut-away view among the present invention's " a kind of distribution transformer mesolow integration protection method ", and it is made up of with output unit 302, PERCOM peripheral communication human and machine interface unit 303 and fault message processing unit 304 current and voltage signals converter unit 301, switching value input.
Fig. 3 is the course of work of the present invention's " a kind of distribution transformer mesolow integration protection method ": the current signal of distribution transformer inlet wire side is input in the current and voltage signals converter unit 301 by bundle conductor 305, the voltage signal of distribution transformer inlet wire side is input in the current and voltage signals converter unit 301 by bundle conductor 306, the current signal of low-voltage circuit breaker outlet side is input in the current and voltage signals converter unit 301 by bundle conductor 307, and the voltage signal of low-voltage circuit breaker outlet side is input in the current and voltage signals converter unit 301 by bundle conductor 308; Current and voltage signals converter unit 301 is transformed to fault message with the electric current of bundle conductor 305, bundle conductor 306, bundle conductor 307 and bundle conductor 308 inputs and voltage signal and handles and be transferred to fault message by bundle conductor 313 after the diagnosis unit 304 receivable information and handle diagnosis unit 304.The state information relevant with the integrated distribution transformer protective device of mesolow is input in switching value input and the output unit 302 by bundle conductor 312, is transformed to that fault message is handled diagnosis unit 304 acceptable signals after bundle conductor 314 is input to fault message handles in the diagnosis unit 304 through switching value input and output unit 302.Whether fault message is handled current signal, the voltage signal information of diagnosis unit 304 according to pressure and low pressure in the next distribution transformer of bundle conductor 313 transmission, break down with state information diagnosis distribution change device and the line related thereof relevant with the integrated distribution transformer protective device of mesolow that come through bundle conductor 314 transmission.Fault message is handled diagnosis unit 304 and diagnostic message is transferred in switching value input and the output unit 302 through bundle conductor 314; be installed in the medium voltage breaker tripping operation and the combined floodgate of distribution transformer inlet wire side by bundle conductor 309 output controls; control circuit breaker trip and the combined floodgate that is installed in distribution transformer outlet side by bundle conductor 310 outputs, the various state informations of the integrated distribution transformer protective device of mesolow are by bundle conductor 311 outputs.PERCOM peripheral communication human and machine interface unit 303 is transferred to PERCOM peripheral communication and man-machine interface information in the fault message processing diagnosis unit 304 by bundle conductor 315 on the one hand, handle diagnosis unit 304 for fault message information is provided, simultaneous faults information processing diagnosis unit 304 is transferred to information in the PERCOM peripheral communication human and machine interface unit 303 through bundle conductor 315, uses for PERCOM peripheral communication and demonstration.
Claims (3)
1. distribution transformer mesolow integration protection method; it is by medium voltage breaker [204]; the integrated distribution transformer protective device of mesolow [203]; current transformer [206]; voltage transformer [209]; distribution transformer [211]; low-voltage circuit breaker [216]; current transformer [217] and voltage transformer [218] are formed; it is characterized in that: the integrated distribution transformer protective device of mesolow [203] is by bundle conductor [205] control medium voltage breaker [204] tripping operation and combined floodgate, and the integrated distribution transformer protective device of mesolow [203] passes through bundle conductor [213] control low-voltage circuit breaker [216] tripping operation and closes a floodgate.
2. according to right 1 described a kind of distribution transformer mesolow integration protection method, it is characterized in that: the electric current on the middle pressure bus [208] by current transformer [206] conversion after bundle conductor [207] be input in the integrated distribution transformer protective device of mesolow [203], the voltage on the middle pressure bus [208] by voltage transformer [209] conversion after bundle conductor [210] be input in the integrated distribution transformer protective device of mesolow [203]; Electric current on the low-voltage bus bar [219] by current transformer [217] conversion after bundle conductor [215] be input in the integrated distribution transformer protective device of mesolow [203]; voltage on the low-voltage bus bar [219] by voltage transformer [218] conversion after bundle conductor [214] be input in the integrated distribution transformer protective device of mesolow [203], for the integrated distribution transformer protective device of mesolow [203] provides mesolow current/voltage failure diagnosis information.
3. according to right 1 described a kind of distribution transformer mesolow integration protection method; it is characterized in that: when the integrated distribution transformer protective device of mesolow [203] diagnosed out distribution transformer [211] and line related thereof to break down, the integrated distribution transformer protective device of mesolow [203] was controlled low-voltage circuit breaker [216] tripping operation according to nature of trouble by bundle conductor [205] control medium voltage breaker [204] tripping operation with by bundle conductor [213].
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810181082A CN101741061A (en) | 2008-11-24 | 2008-11-24 | Distribution transformer medium voltage low voltage integration protection method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810181082A CN101741061A (en) | 2008-11-24 | 2008-11-24 | Distribution transformer medium voltage low voltage integration protection method |
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| CN101741061A true CN101741061A (en) | 2010-06-16 |
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| CN200810181082A Pending CN101741061A (en) | 2008-11-24 | 2008-11-24 | Distribution transformer medium voltage low voltage integration protection method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102222886A (en) * | 2011-06-23 | 2011-10-19 | 周庆生 | Protection device and method for high-voltage vacuum power distribution equipment for mining |
| CN102340126A (en) * | 2010-07-15 | 2012-02-01 | Abb技术股份公司 | A power and control unit for a low or medium voltage apparatus |
| CN103500990A (en) * | 2013-09-30 | 2014-01-08 | 国家电网公司 | Selection method of buscouple CT (current transformer) winding in optimized busbar differential protection devices |
| CN106099874A (en) * | 2016-06-30 | 2016-11-09 | 国网山东省电力公司青岛供电公司 | A kind of 35kV transformer station 10kV circuit protection circuit |
| CN106505529A (en) * | 2016-11-09 | 2017-03-15 | 国网辽宁省电力有限公司鞍山供电公司 | A kind of intelligent substation low-voltage bus bar guard method |
| CN112578319A (en) * | 2021-01-12 | 2021-03-30 | 国网山东省电力公司成武县供电公司 | Low-voltage distribution cabinet equipment line connection point monitoring alarm device |
-
2008
- 2008-11-24 CN CN200810181082A patent/CN101741061A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102340126A (en) * | 2010-07-15 | 2012-02-01 | Abb技术股份公司 | A power and control unit for a low or medium voltage apparatus |
| CN102340126B (en) * | 2010-07-15 | 2015-12-02 | Abb技术股份公司 | For the power and control unit of low pressure or medium-voltage equipment |
| CN102222886A (en) * | 2011-06-23 | 2011-10-19 | 周庆生 | Protection device and method for high-voltage vacuum power distribution equipment for mining |
| CN103500990A (en) * | 2013-09-30 | 2014-01-08 | 国家电网公司 | Selection method of buscouple CT (current transformer) winding in optimized busbar differential protection devices |
| CN103500990B (en) * | 2013-09-30 | 2016-02-10 | 国家电网公司 | A kind of system of selection optimizing mother CT winding in bus differential protection device |
| CN106099874A (en) * | 2016-06-30 | 2016-11-09 | 国网山东省电力公司青岛供电公司 | A kind of 35kV transformer station 10kV circuit protection circuit |
| CN106505529A (en) * | 2016-11-09 | 2017-03-15 | 国网辽宁省电力有限公司鞍山供电公司 | A kind of intelligent substation low-voltage bus bar guard method |
| CN112578319A (en) * | 2021-01-12 | 2021-03-30 | 国网山东省电力公司成武县供电公司 | Low-voltage distribution cabinet equipment line connection point monitoring alarm device |
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Application publication date: 20100616 |