CN105098983A - Power consumer demarcation load switch with encrypted communication function - Google Patents
Power consumer demarcation load switch with encrypted communication function Download PDFInfo
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- CN105098983A CN105098983A CN201510475022.8A CN201510475022A CN105098983A CN 105098983 A CN105098983 A CN 105098983A CN 201510475022 A CN201510475022 A CN 201510475022A CN 105098983 A CN105098983 A CN 105098983A
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Abstract
The invention relates to a power consumer demarcation load switch with an encrypted communication function, and the switch is connected and arranged between a load inlet wire power supply side of a consumer and a power distribution load side of a power grid. The switch comprises an independent pluggable electrical plate which comprises an AC sampling end, a CPU, a control output terminal, an operation panel used for inputting instructions and a wireless communication terminal used for accessing a distribution line on-line monitoring main station, and the operation panel and the wireless communication terminal are connected with the CPU. The wireless communication terminal is further coupled with an encryption chip and is connected with the power distribution network security accessing end through the encryption chip, the accessing information of the power consumer demarcation load switch is decoded through the security accessing end, the decoded information is transmitted to the distribution line on-line monitoring main station to form a communication between the above main station and the power consumer demarcation load switch.
Description
Technical field
The present invention relates to a kind of improvement of power consumer demarcation load switch, in order to solve the control security of on-load switch.
Background technology
Power consumer demarcation load switch is as the property right separation being arranged on Utilities Electric Co. and user side, and can play the effect of good zone isolation under the internal fault condition of user side, this product has been installed and applied.Traditional user demarcation switch is not with communication function or is directly adopted plaintext communication, electrical network installs access new demand about protecting information safety and wireless terminal cannot be met, therefore can only cannot access Utilities Electric Co.'s Intranet in public network erection, cause main website data to share and to merge.
As the chief component of an electric power system, sharing of load equilibrium in three-phase power line between each phase line is very important, not only relate to the phase line current equalization problem of three-phase power line, relate to again and reduce line loss, the economical operation of electrical network and security problems.Due to the imbalance of electric power system three-phase load, if a certain phase load is bigger than normal, line loss is increased, this phase circuit works under heavy load, both can affect the security of operation of transformer, again reduces the power supply capacity of transformer, cause line loss to increase, the economical operation of whole electric power system is poor.
In electric power system, user demarcation switch coordinates the embodiment of phase sequence switching device shifter few and unstable, such as operation maintenance personnel can only control the situation of phase sequence instability by the mode of Site Detection, and cannot be carried out the running status of detection load side by the signal designation of user demarcation switch.
Summary of the invention
In known techniques, power consumer demarcation load switch, be arranged between user load incoming power side and electrical network distribution load side, comprise the user isolation switch connecting user load incoming power side and the Distribution Network Load Data switch connecting described electrical network distribution load side.The invention solves the problem of user demarcation switch safety access electric power Intranet, it is also proposed a kind of power consumer demarcation load switch with communication information encryption mechanism simultaneously.
The embodiment of the present invention solves aforementioned drawback, makes improvement on the basis of the above to user demarcation switch.In one aspect; user demarcation switch is divided into diverter switch and electric plates two parts; wherein electric plates can conveniently by the data-interface that user demarcation switch is arranged to control the action of diverter switch; strong power part is carried out Isolated Shield protection, and electric plates light current terminal being led to separation realizes controlling.In outstanding at one, the function of electric plates initiatively can be selected by operation maintenance personnel; In yet another aspect, electric plates has encryption function, namely can realize long-range encryption communication transmission to the control of user demarcation switch, thus avoid illegal terminal to access electrical network, realize safe and effective management.
In order to realize above-mentioned effect, at the user isolation switch of described power consumer demarcation load switch and Distribution Network Load Data switch room, zero-sequence transformer (ZLCT) is set, comprise electric plates again, described electric plates is provided with and exchanges AC sampling end, CPU, control output end and communication terminal, wherein said interchange AC sampling end obtains AC voltage or current signal by being located at power on gas current instrument transformer (ELCT) and the electric voltage transformer (ELPT) be located between the phase line of described electrical network distribution load side two of described user load incoming power side two phase line, by obtain stream pressure signal send to CPU, described CPU carries out controlling described control output end after process judges to signal and carries out on-off action to isolating switch or on-load switch.Wherein, described electric plates is an independently pluggable electric plates, and it has again the guidance panel for instruction input, and for accessing the wireless telecommunications end of distribution line on-line monitoring main website, described guidance panel is connected described CPU with wireless telecommunications end.Described wireless telecommunications end is coupled with encryption chip further, distribution network secure accessing end is connected by described encryption chip, after being decoded by the access information of described secure accessing end to accessed power consumer demarcation load switch, decoded information is reached described distribution line on-line monitoring main website, the communication between foundation and described power consumer demarcation load switch.
Power consumer demarcation load switch embodiment of the present invention, by integrated security encryption chip in power consumer demarcation load switch, solves the problem of (1) user demarcation switchgear secure accessing certification; (2) message of information transmission is encrypted, eliminates because of the potential safety hazard that the information content is leaked or outer net is invaded and brought.Adopt the beneficial effect after the embodiment of the present invention: the user demarcation switch adopting band encryption chip, can realize access authentication one to one and the management of terminal, avoid illegal terminal connecting system; Adopt the user demarcation switch of band encryption chip, can guarantee that transinformation content is not decrypted, guarantee information transmission security.
Phase-sequence current sample circuit is provided with in ELCT secondary winding side, zero sequence circuit sampling circuit is provided with in ZLCT, described phase-sequence current sample circuit is connected CPU in described electric plates respectively with zero-sequence current sample circuit, wherein said CPU is configured to determine whether described zero-sequence current value is greater than predetermined threshold value according to described each phase-sequence current value of phase-sequence current sample circuit gained and zero-sequence current sample circuit gained zero-sequence current value, if, then utilize control output end to control user isolation switch, the load making to have under maximum phase sequence current value switches to the user load had under minimum phase-sequence current value.
Another embodiment of power consumer demarcation load switch of the present invention can be suppressed by reaching the mode existed owing to passing through to control user isolation switch during input AC alternating current instability in low-voltage customer side in the mode of (such as) overlapping conversion phase sequence; and interchange phase sequence is changed by on-load switch mutually that controlled Distribution Network Load Data side by electric plates simultaneously; thus reach the stable equilibrium exchanging phase sequence, the normal use of protection power consumer demarcation load switch.
In one embodiment, the second phase sequence switch that Distribution Network Load Data switch comprises the first phase sequence switch and connects with it, makes the first phase sequence in electrical network distribution load side can switch to the second phase sequence or third phase sequence to the first phase sequence.First, second phase sequence switch described is respectively equipped with phase line link and public connecting end.Wherein: the phase line link of described first phase sequence switch is connected to electrical network distribution load side power transmission line two phase line separately; The phase line link of described second phase sequence switch is connected to the public connecting end of described electrical network distribution load side power transmission line third phase line and the first phase sequence switch separately; The public connecting end of described second phase sequence switch is connected to the armature winding side of ELPT.
As improvement, described first phase sequence switch has the phase sequence wiring being different from the second phase sequence switch, and described first phase sequence switch or the second phase sequence switches set become a phase sequence diverter switch overall.Each phase line is equipped with ELPT, and wherein ELPT connects the second phase sequence switch, and the first phase sequence switch is not directly connected with the second phase sequence switch, but mutually switches according to the control command of CPU.
Preferably, first phase sequence switch comprises the end in electrical contact connecting electrical network two phase line separately, wherein said end in electrical contact has at least one switching device again respectively, and has the first moving contact connecting B phase line and the conduction rod be attached thereto in described vacuum switch tube.
On the other hand, power consumer demarcation load switch by the phase sequence sharing of load stability of detection of grid supply load side, can control the on-off action state of user demarcation switch, to protect load better and to reduce line loss.In outstanding at one, phase sequence construction of switch of the present invention is in interlock mode, avoids the performance deficiency of conventional tangential switch, is swift in response accurately.
Accompanying drawing explanation
Fig. 1 is the functional structure schematic diagram of power consumer demarcation load switch of the present invention;
Fig. 2 is the more detailed schematic diagram of the function of power consumer demarcation load switch of the present invention in conjunction with distribution power line;
Fig. 3 is a kind of functional structure chart of the first or second phase sequence switch of power consumer demarcation load switch of the present invention;
Fig. 4 is the another kind of functional structure chart of the first or second phase sequence switch of power consumer demarcation load switch of the present invention.
Embodiment
With reference to Fig. 1 and 2, the embodiment of power consumer demarcation load switch 100 is arranged between user load incoming power side 300 and electrical network distribution load side 200, mainly includes the user isolation switch 13 connecting user load incoming power side 300 and the Distribution Network Load Data switch 11 connecting described electrical network distribution load side 200.
With reference to Fig. 2, in the preferred embodiment, user demarcation switch 100 is divided into diverter switch (i.e. the switch sections of parts 11,12 and 13 composition) and electric plates 400 two parts, wherein electric plates 400 can conveniently by the data-interface that user demarcation switch 100 is arranged, such as guidance panel 42 controls the action of this diverter switch, and strong power part is carried out Isolated Shield, the electric plates 400 light current terminal being led to separation realizes controlling.
In outstanding at one, the function of electric plates 400 initiatively can be selected by operation maintenance personnel, and electric plates 400 has encryption function simultaneously, namely can realize long-range encryption communication transmission to the control of user demarcation switch, thus avoid illegal terminal to access electrical network, realize safe and effective management.
Therefore, the present embodiment can comprise the discrete electric plates 400 with encryption function, and electric plates is provided with and exchanges AC sampling end 41, CPU44, control output end 42 (such as data-interface or guidance panel) and wireless telecommunications end 45.Exchange AC sampling end 41 and obtain AC voltage or current signal by being located at power on gas current instrument transformer (ELCT) 31 and the electric voltage transformer (ELPT) 21 be located between the 200 liang of phase lines in described electrical network distribution load side of any two phase lines in described user load incoming power side 300, zero-sequence transformer (ZLCT) 12 is set between the user isolation switch 13 and Distribution Network Load Data switch 11 of described power consumer demarcation load switch 100.By obtain stream pressure signal send to CPU, described CPU to signal carry out process judge after control 43 pairs, described control output end isolating switch 13 or on-load switch 11 carry out on-off action.
Such as, electric plates 400 is independently pluggable pcb boards, and it has the guidance panel 42 for instruction input, and for accessing the wireless telecommunications end 45 of distribution line on-line monitoring main website.Guidance panel 42 is connected described CPU with wireless telecommunications end 45.Described wireless telecommunications end is coupled with encryption chip 46 further, distribution network secure accessing end is connected by described encryption chip, after being decoded by the access information of described secure accessing end to accessed power consumer demarcation load switch 100, decoded information is reached described distribution line on-line monitoring main website, the communication between foundation and described power consumer demarcation load switch.
In the modified embodiment of Fig. 2, phase-sequence current sample circuit 311 is provided with in the secondary winding side of ELCT31, in ZLCT, be provided with zero sequence circuit sampling circuit 121, described phase-sequence current sample circuit 311 and zero-sequence current sample circuit 121 are connected CPU44 in described electric plates 400 respectively.CPU is configured to according to described phase-sequence current sample circuit 311A, 311B, 311C that each phase-sequence current value of gained A, B, C and zero-sequence current sample circuit 121 gained zero-sequence current value determine whether described zero-sequence current value is greater than a predetermined threshold value respectively.
According to the technology of the present invention main points, the power consumer demarcation load switch 100 for isolating two kinds of potential region is devised between high pressure forceful electric power AC power line side, place, electrical network distribution load side 1 and place, power grid user load inlet wire side low pressure weak-feedback side of transmission line 2, all access the CPU44 in electric plates 400 at the output of weak-feedback side of transmission line 2 and forceful electric power side 1, what export should be the digital electric signal that CPU can read.Wherein in weak-feedback side of transmission line 2, for three-phase current respectively configures a road sample circuit 311A-C.Simultaneously as improving further, sample circuit 311A-C output respectively configures a comparison circuit 312A-C, is compared between two by three sample circuit 311A-C gained current signals, such as A phase current contrast B phase current, B phase current contrast C phase current etc.Relatively gained difference or ratio value transfer to CPU.If wherein CPU determines it is then utilize control output end 43 to control user isolation switch 13, the load making to have under maximum phase sequence current value switches to the user load had under minimum phase-sequence current value.Such as, limited each maximum input current value going up user load (single-phase or threephase load) mutually by isolating switch 13.
In one embodiment; power consumer demarcation load switch 100 comprises the overcurrent earth leakage protector 313 being located at low pressure weak-feedback side of transmission line 2 further; be connected between (such as) described user isolation switch 13 and electric plates CPU44; according to described CPU judge measured zero-sequence current value be greater than the time threshold of predetermined threshold value (such as CPU exist after judging to turn off isolating switch 13 time delay exceed 1.5s after diverter switch still not operating), carry out the action of overcurrent ground protection.
In another embodiment, the three-phase AC alternating current line of force phase sequence that the action that described CPU44 is configured to control described user isolation switch 13 according to control output end 43 further controls the electrical network distribution load distribution network on-load switch 11 of described high pressure forceful electric power side 1 switches.Further, the second phase sequence switch 112 that described Distribution Network Load Data switch 11 can comprise the first phase sequence switch 111 and connect with it, make the first phase sequence in electrical network distribution load side 100, such as A phase can to the second phase sequence, such as B phase switch or third phase sequence C in opposite directions the first phase sequence A be added to switch.
In the embodiment of fig. 2, the first phase sequence switch 111 has the phase sequence wiring being different from the second phase sequence switch 112.Meanwhile, each phase line is equipped with ELPT21A-C, wherein ELPT21A connects the second phase sequence switch 112A, and the first phase sequence switch 111BC directly can not be connected with the second phase sequence switch 112A, but mutually switches according to the control command of CPU.In one embodiment, first, second phase sequence switch described is respectively equipped with phase line link and public connecting end.Wherein: the phase line link of described first phase sequence switch 112BC is connected to electrical network distribution load side power transmission line B, C two phase line separately; The phase line link of described second phase sequence switch 112A is connected to the public connecting end of described electrical network distribution load side power transmission line third phase line A phase and the first phase sequence switch 111BC separately; The public connecting end of described second phase sequence switch 112A is connected to the armature winding side of electric voltage transformer (ELPT) 21A.Preferably, relay isolating switch 214A-C is configured with to each ELPT21A-C, realizes turning off relay protection for there is unbalanced situation in phase sequence under.
In kind of the embodiment of two shown in Fig. 3 and 4, as outstanding advantages, it is overall that described first phase sequence switch 111 or the second phase sequence switch 112 form a phase sequence diverter switch, such as, first phase sequence switch 111BC comprises the end in electrical contact and the end in electrical contact being connected electrical network C phase line that connect electrical network B phase line separately, wherein said end in electrical contact has again such as vacuum switch tube 601A and 601B respectively, and there is in described vacuum switch tube 601A the first moving contact 611A connecting B phase line and the conduction rod 603A be attached thereto, similarly, vacuum tube 601B has the second moving contact 611B connecting C phase line and the conduction rod 603B be attached thereto.
Wherein, the connecting rod that described conduction rod 603A and 603B is combined into has regular length, and the rotating shaft 604A that is fixed mutually separates and is fixed on a changer lever 604.In one embodiment, described changer lever 604 can rotate along a switching shaft 614, and its rotational action makes fixed rotating shaft 604A drive conduction rod 604A and 604B to move in a lateral direction, thus drives vacuum switch tube 601A or 601B to be turned on or off.In another embodiment, changer lever 604 is provided with another fixed rotating shaft 604B, similarly, fixed rotating shaft 604B is used for fixing an electromagnetism changer lever, it is separated into first, second changer lever 605A, 605B, wherein be configured with magnetic core 606A, a 606B with each changer lever, for controlling iron core 615 part of the first or second changer lever described in adhesive according to the control command of above-mentioned CPU, thus known, changer lever 605A or 605B does not have made by conductivity or the extremely weak rigid material of conductivity.In yet another embodiment, be configured with the public connecting end 602 connecting described changer lever 604, public connecting end 602 is fixed on fixed rotating shaft 614, thus can not swing because of the rotation of changer lever 604 when contacting power line, affects electrical contact.As shown in Figure 3, phase sequence switch of the present invention is in the state switched left, namely under this state, the moving contact 611A of the first vacuum switch 601A contacts conducting, the motion of conduction rod 603A, 603B be subject to magnetic core 606B adhesive electromagnetism changer lever 605B iron core 615 and drive, namely allow iron core 615 completely electrical contact conducting strip 607 and allow CPU44 identify phase sequence switching signal, now magnetic core 606A ejects the magnetic core 615 of the first changer lever 605A.
Shown in Fig. 3, first conduction rod 603A is connected to B phase line, and the second conduction rod 603B not conducting is to C phase line, and according to above-mentioned principle, the public connecting end 602 of second switch 112A is connected to A phase line, then according to Fig. 2, be coupled the phase line end 603A conducting of the second phase sequence switch 112A that (being with the electrical contact of travel switch mode between the public connecting end 602 of such as the first phase sequence switch 111BC and a conduction rod of the second phase sequence switch 112A) is set to A phase line with the first phase sequence switch 111BC, and as can be seen from Figure 2, such as switch 112A, it is be connected to ELPT21A in normal state, namely under being in A phase sequence, only when above-mentioned CPU needs to carry out phase sequence switching, now the first phase sequence switch 111BC connects, then (such as) C of the first phase sequence switch 111BC contravention 603B that connects to connect contravention 603A redirect to B, and B phase power line current passes through changer lever 614 conducting to public connecting end 602 again by bar 603A to rotating shaft 604A, now the phase line contact jaw of switch 112A can switch to contact to public connecting end 602 from third phase line A phase sequence, thus, second phase sequence switch 112A realizes being coupled with the first phase sequence switch 111BC, achieve originally A phase to the phase sequence of B phase to switch simultaneously.In like manner, for all the other two switch 111AC and 112B, or 111AB and 112C can synchronously realize this operation, mutually switches with the phase sequence realizing high pressure three-phase electricity, thus the stability of adjustment AC electric current, then pass through the electric induction of (such as) high frequency transformer ELPT21A-C.
Fig. 4 schematically shows the structure of the another kind of embodiment of switch 111BC or 112A.Be different from embodiment illustrated in fig. 3, Fig. 4 embodiment is the switch folding realizing phase sequence switching in the vertical.First phase sequence switch 111BC comprises the end in electrical contact and the end in electrical contact being connected electrical network C phase line that connect electrical network B phase line separately, wherein said end in electrical contact has again (such as) vacuum switch tube 601A and 601B of longitudinal design respectively, and there is in described vacuum switch tube 601A the first moving contact 611A connecting B phase line and the conduction rod 603A be attached thereto, similarly, vacuum tube 601B has the second moving contact 611B connecting C phase line and the conduction rod 603B be attached thereto.
Such as, conduction rod 603A has regular length, and the rotating shaft 604A that is fixed mutually separates and is fixed on a changer lever 604.In one embodiment, described changer lever 604 can rotate along a switching shaft 614, and its rotational action makes fixed rotating shaft 604A drive conduction rod 603A or 603B to move in a longitudinal direction, thus drives vacuum switch tube 601A or 601B to be turned on or off.Changer lever 604 is provided with fixed rotating shaft 614.Fixed rotating shaft 614 is for fixing switching shaft 614 and make it rotate in the vertical, changer lever 605 is configured with iron core 615, and be configured with a magnetic core 607 for each iron core 615 correspondence, for controlling iron core 615 part of changer lever described in adhesive according to the control command of above-mentioned CPU.Thus known, changer lever 605 does not have made by conductivity or the extremely weak rigid material of conductivity, and have scalability.
In yet another embodiment, above-mentioned switch is configured with again the public connecting end 602 connecting described changer lever 604, public connecting end 602 is connected to fixed rotating shaft 614 by a fixing conducting block 624, thus can not swing because of the rotation of changer lever 604 when contacting power line, affects electrical contact.As shown in Figure 3, fixing conducting block has two resilient electrical contact parts 612, and one of them parts 612 hang on public connecting end 602, and public connecting end 602 is fixed installation part, can be used as a hanging scroll.Fixed block 624 and axle 604 can not produce relative displacement, then, when another parts 612 are articulated in fixing point 622, by the interaction of two elastic portion part 612, the Quick mechanical of driven rod 604 swings, thus realize high-speed switch switching.
Phase sequence switch of the present invention is in the state switched left, namely under this state, the moving contact 611A of the first vacuum switch 601A contacts conducting, the motion of conduction rod 603A, 603B be subject to magnetic core 607 adhesive electromagnetism changer lever 605 iron core 615 and drive, namely allow the conductive component of iron core 615 completely in electrical contact magnetic core 606 and allow CPU44 identify phase sequence switching signal 5.
Similarly according to shown in Fig. 4, first conduction rod 603A is connected to B phase line, and the second conduction rod 603B not conducting is to C phase line, and according to above-mentioned principle, the public connecting end 602 of second switch 112A is connected to A phase line, then according to Fig. 2, be coupled the phase line end 603A conducting of the second phase sequence switch 112A that (being with the electrical contact of travel switch mode between the public connecting end 602 of such as the first phase sequence switch 111BC and a conduction rod of the second phase sequence switch 112A) is set to A phase line with the first phase sequence switch 111BC, and as can be seen from Figure 2, such as switch 112A, it is be connected to ELPT21A in normal state, namely under being in A phase sequence, only when above-mentioned CPU needs to carry out phase sequence switching, now the first phase sequence switch 111BC connects, then (such as) C of the first phase sequence switch 111BC contravention 603B that connects to connect contravention 603A redirect to B, and B phase power line current passes through changer lever 614 conducting to public connecting end 602 again by bar 603A to rotating shaft 604A, now the phase line contact jaw of switch 112A can switch to contact to public connecting end 602 from third phase line A phase sequence, thus, second phase sequence switch 112A realizes being coupled with the first phase sequence switch 111BC, achieve originally A phase to the phase sequence of B phase to switch simultaneously.
In the above-described embodiments, conduction rod 603A, B and switching shaft 604 and public connecting end 603, the attachment component comprised on it all possesses satisfactory electrical conductivity, and changer lever 605A, B part except iron core 615 does not have conductivity.
On the other hand, can realize, to the method for spatial load forecasting, mainly including by power consumer demarcation load switch of the present invention:
1001, determine whether described zero-sequence current value is greater than a predetermined threshold value according to each phase-sequence current value of phase-sequence current sample circuit (ELCT) 31 gained and zero-sequence current sample circuit (ZLCT) 12 gained zero-sequence current value, if, then utilize control output end 43 to control user isolation switch 100, the user load making to have under maximum phase sequence current value switches to the user load had under minimum phase-sequence current value;
Be provided with phase-sequence current sample circuit 311 in the secondary winding side of ELCT31, be provided with zero sequence circuit sampling circuit 121 in ZLCT, described phase-sequence current sample circuit 311 and zero-sequence current sample circuit 121 are connected CPU44 in described electric plates 400 respectively.CPU is configured to according to described phase-sequence current sample circuit 311A, 311B, 311C that each phase-sequence current value of gained A, B, C and zero-sequence current sample circuit 121 gained zero-sequence current value determine whether described zero-sequence current value is greater than a predetermined threshold value respectively;
1002, the phase sequence that the action controlling described user isolation switch according to control output end controls described electrical network distribution load distribution network on-load switch 11 switches; And
1003, control to switch the phase sequence of electrical network distribution load distribution network on-load switch by multiple phase sequence switch.
In improving at one, the output for sample circuit 311A-C is respectively configured with a comparison circuit 312A-C, is compared between two by three sample circuit 311A-C gained current signals.Such as, A phase current contrast B phase current, B phase current contrast C phase current etc.Relatively gained difference or ratio value transfer to CPU.If wherein CPU determines it is then utilize control output end 43 to control user isolation switch 13, the load making to have under maximum phase sequence current value switches to the user load had under minimum phase-sequence current value.Such as, limited each maximum input current value going up user load (single-phase or threephase load) mutually by isolating switch 13.
In another improvement, the second phase sequence switch 112 that described Distribution Network Load Data switch 11 can comprise the first phase sequence switch 111 and connect with it, make the first phase sequence in electrical network distribution load side 100, such as A phase can to the second phase sequence, such as B phase switch or third phase sequence C in opposite directions the first phase sequence A be added to switch.
First phase sequence switch 111 has the phase sequence wiring being different from the second phase sequence switch 112.Meanwhile, each phase line is equipped with ELPT21A-C, wherein ELPT21A connects the second phase sequence switch 112A, and the first phase sequence switch 111BC directly can not be connected with the second phase sequence switch 112A, but mutually switches according to the control command of CPU.In one embodiment, first, second phase sequence switch described is respectively equipped with phase line link and public connecting end.Wherein: the phase line link of described first phase sequence switch 112BC is connected to electrical network distribution load side power transmission line B, C two phase line separately; The phase line link of described second phase sequence switch 112A is connected to the public connecting end of described electrical network distribution load side power transmission line third phase line A phase and the first phase sequence switch 111BC separately; The public connecting end of described second phase sequence switch 112A is connected to the armature winding side of electric voltage transformer (ELPT) 21A.Preferably, relay isolating switch 214A-C is configured with to each ELPT21A-C, realizes turning off relay protection for there is unbalanced situation in phase sequence under.
In one embodiment, electric plates 400 has the wireless telecommunications end 45 of access distribution line on-line monitoring main website, this wireless telecommunications end 45 is coupled with encryption chip 46 further, distribution network secure accessing end is connected by described encryption chip, after being decoded by the access information of described secure accessing end to accessed power consumer demarcation load switch 100, decoded information is reached described distribution line on-line monitoring main website, the communication between foundation and described power consumer demarcation load switch.
Claims (9)
1. there is the power consumer demarcation load switch of encryption communication function, be arranged between user load incoming power side and electrical network distribution load side, comprise the user isolation switch connecting user load incoming power side and the Distribution Network Load Data switch connecting described electrical network distribution load side, at described user isolation switch and Distribution Network Load Data switch room, zero-sequence transformer (ZLCT) is set, comprise electric plates again, described electric plates is provided with and exchanges AC sampling end, CPU, control output end, wherein said interchange AC sampling end obtains AC stream pressure signal by the electrical current instrument transformer (ELCT) be located in any two phase lines in described user load incoming power side and the electric voltage transformer (ELPT) be located between the phase line of described electrical network distribution load side two, obtained signal is sent to CPU, described CPU carries out controlling described control output end after process judges to signal and carries out on-off action to user isolation switch or Distribution Network Load Data switch, it is characterized in that: described electric plates is an independently pluggable electric plates, electric plates has again the guidance panel for instruction input, and for accessing the wireless telecommunications end of distribution line on-line monitoring main website, described guidance panel is connected described CPU with wireless telecommunications end, wherein:
Described wireless telecommunications end is coupled with encryption chip further, distribution network secure accessing end is connected by described encryption chip, after being decoded by the access information of described secure accessing end to accessed power consumer demarcation load switch, decoded information is reached described distribution line on-line monitoring main website, the communication between foundation and described power consumer demarcation load switch;
The second phase sequence switch that described Distribution Network Load Data switch comprises the first phase sequence switch and connects with it, makes the first phase sequence in electrical network distribution load side can switch to the second phase sequence or third phase sequence to the first phase sequence.
2. the power consumer demarcation load switch with encryption communication function according to claim 1, is characterized in that: first, second phase sequence switch described is respectively equipped with phase line link and public connecting end.Wherein:
The phase line link of described first phase sequence switch is connected to electrical network distribution load side power transmission line two phase line separately; The phase line link of described second phase sequence switch is connected to the public connecting end of described electrical network distribution load side power transmission line third phase line and the first phase sequence switch separately; The public connecting end of described second phase sequence switch is connected to the armature winding side of ELPT.
3. the power consumer demarcation load switch with encryption communication function according to claim 2, it is characterized in that: described first phase sequence switch has the phase sequence wiring being different from the second phase sequence switch, described first phase sequence switch or the second phase sequence switches set become a phase sequence diverter switch overall.
4. the power consumer demarcation load switch with encryption communication function according to claim 2, it is characterized in that: in each phase line, be equipped with ELPT, wherein ELPT connects the second phase sequence switch, first phase sequence switch is not directly connected with the second phase sequence switch, but mutually switches according to the control command of CPU.
5. the power consumer demarcation load switch with encryption communication function according to claim 3, it is characterized in that: the first phase sequence switch comprises the end in electrical contact connecting electrical network two phase line separately, wherein said end in electrical contact has at least one switching device again respectively, and has the first moving contact connecting B phase line and the conduction rod be attached thereto in described vacuum switch tube.
6. the power consumer demarcation load switch with encryption communication function according to claim 5, is characterized in that: described switching device selects vacuum switch tube.
7. the power consumer demarcation load switch with encryption communication function according to claim 5, it is characterized in that: the connecting rod that described conduction rod is combined into has regular length, the rotating shaft that is fixed mutually is separated and is fixed on a changer lever, described changer lever can rotate along a switching shaft, its rotational action makes fixed rotating shaft drive conduction rod to move in a lateral direction, thus drives vacuum switch tube to be turned on or off.
8. the power consumer demarcation load switch with encryption communication function according to claim 7, it is characterized in that: changer lever is provided with another fixed rotating shaft, fixed rotating shaft is used for fixing an electromagnetism changer lever, it is separated into first, second changer lever, wherein be configured with a magnetic core with each changer lever, for controlling the core portion of the first or second changer lever described in adhesive according to the control command of above-mentioned CPU, above-mentioned public connecting end is fixed on fixed rotating shaft, thus can not swing because of the rotation of changer lever when contacting power line.
9. the power consumer demarcation load switch with encryption communication function according to claim 7 or 8, is characterized in that: above-mentioned changer lever does not have made by conductivity or the extremely weak rigid material of conductivity.
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| CN201510475022.8A CN105098983B (en) | 2015-08-05 | 2015-08-05 | Power consumer demarcation load switch with encryption communication function |
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| CN201510475022.8A CN105098983B (en) | 2015-08-05 | 2015-08-05 | Power consumer demarcation load switch with encryption communication function |
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| CN (1) | CN105098983B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006342689A (en) * | 2005-06-07 | 2006-12-21 | Toyota Motor Corp | Control device of bi-fuel engine |
| CN101282033A (en) * | 2007-08-08 | 2008-10-08 | 珠海许继电气有限公司 | User demarcation load switch |
| CN204794081U (en) * | 2015-08-05 | 2015-11-18 | 国网浙江省电力公司湖州供电公司 | Power consumer boundary load switch with encrypt communication function |
-
2015
- 2015-08-05 CN CN201510475022.8A patent/CN105098983B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006342689A (en) * | 2005-06-07 | 2006-12-21 | Toyota Motor Corp | Control device of bi-fuel engine |
| CN101282033A (en) * | 2007-08-08 | 2008-10-08 | 珠海许继电气有限公司 | User demarcation load switch |
| CN204794081U (en) * | 2015-08-05 | 2015-11-18 | 国网浙江省电力公司湖州供电公司 | Power consumer boundary load switch with encrypt communication function |
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| CN105098983B (en) | 2018-02-27 |
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