CN104882795B - Power distribution network ring main unit control circuit having broken line monitoring function - Google Patents
Power distribution network ring main unit control circuit having broken line monitoring function Download PDFInfo
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- CN104882795B CN104882795B CN201510222853.4A CN201510222853A CN104882795B CN 104882795 B CN104882795 B CN 104882795B CN 201510222853 A CN201510222853 A CN 201510222853A CN 104882795 B CN104882795 B CN 104882795B
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Abstract
The invention discloses a power distribution network ring main unit control circuit having a broken line monitoring function. The power distribution network ring main unit control circuit includes a closing broken line monitoring relay, an opening broken line monitoring relay, a remote communication contact and a broken line on-site indication lamp. The closing broken line monitoring relay and the opening broken line monitoring relay each include a coil and two normally closed contacts. The coil of the closing broken line monitoring relay is in parallel connection with a normally open auxiliary contact of a closing intermediate relay. The coil of the opening broken line monitoring relay is in parallel connection with a normally open auxiliary contact of an opening intermediate relay. The two normally closed contacts of each of the closing broken line monitoring relay and the opening broken line monitoring relay are respectively connected to the remote communication contact and the broken line on-site indication lamp respectively. According to the invention, a remote control circuit abnormity monitoring method and a local control circuit abnormity monitoring method are provided in a creative manner, thereby thoroughly solving the problems that inspection workers cannot timely find and handle control circuit defects due to the lack of on-site or remote alarming signals causes inspection workers at present. Therefore, the operation correctness of remote control by power distribution network calling workers is improved.
Description
Technical field
The present invention relates to distribution network engineering technical field, be specifically related to a kind of power distribution network ring main unit with broken string function for monitoring and control loop.
Background technology
At present, whole nation Distribution Automation Construction constantly advances, and power distribution network is intelligent, automatization level constantly promotes.Successful rate of remote control is one of key index affecting the practical level of power distribution automation.Existing power distribution network ring main unit uses the mode that the position of the switch shows on the spot, and is monitored to electrical power distribution automatization system main website by the termination transmission of power distribution automation station institute in the way of remote signalling contact the divide-shut brake position of switch.
Existing ring main unit controls loop and generally comprises the long-range on the spot switching circuit being connected in parallel to DC source bus, closing circuit, sub-gate circuit, close a floodgate and indicate loop, separating brake instruction loop, main website switching signal loop and main website sub-gate signal loop, closing circuit is serially connected with the combined floodgate normally opened auxiliary contact of auxiliary reclay KM1 and closing coil HQ, sub-gate circuit is serially connected with separating brake auxiliary reclay normally opened auxiliary contact KM2 and switching winding TQ, and the coil of combined floodgate auxiliary reclay KM1, the coil of separating brake auxiliary reclay KM2 is serially connected with on the spot remotely in switching circuit respectively.But, in the case of existing ring main unit control loop template, the on-the-spot indication signal that lacks causes tour personnel cannot find the unusual condition in control loop, it is impossible to eliminate defect in time.Simultaneously, the information of control loop template fails to be sent to power distribution automation main station system by remote signalling mode, cause power distribution network dispatcher cannot find in time to control loop abnormal conditions, affect the correctness of power distribution network dispatcher's remote manipulation, thus affect the power distribution automations such as successful rate of remote control practical operation key index.
Summary of the invention
The technical problem to be solved in the present invention is: for the above-mentioned technical problem of prior art, there is provided a kind of for power distribution network operations staff ring main unit scene can be maked an inspection tour the means that effectively monitor are provided, for power distribution network dispatcher to controlling the supervision in loop and remote manipulation provides reliable and judges, it is possible to increase auxiliary tone personnel control loop to the power distribution network ring main unit with broken string function for monitoring of the success rate of ring main unit remote manipulation.
In order to solve above-mentioned technical problem, the technical solution used in the present invention is:
nullA kind of power distribution network ring main unit with broken string function for monitoring controls loop，Including the long-range on the spot switching circuit being connected in parallel to DC source bus、Closing circuit、Sub-gate circuit、Close a floodgate and indicate loop、Separating brake instruction loop、Main website switching signal loop and main website sub-gate signal loop，Described closing circuit is serially connected with the combined floodgate normally opened auxiliary contact of auxiliary reclay KM1 and closing coil HQ，Described sub-gate circuit is serially connected with the separating brake normally opened auxiliary contact of auxiliary reclay KM2 and switching winding TQ，And the coil of combined floodgate auxiliary reclay KM1、The coil of separating brake auxiliary reclay KM2 is serially connected with on the spot remotely in switching circuit respectively，Described power distribution network ring main unit controls loop and also includes the broken string supervisory relay KA1 that closes a floodgate、Separating brake broken string supervisory relay KA2、Remote signalling contact DTU-YX003 and the on-the-spot display lamp YR of broken string，The described broken string supervisory relay KA1 and separating brake broken string supervisory relay KA2 that closes a floodgate all includes coil and two normally closed contacts，In the coil of the described broken string supervisory relay KA1 that closes a floodgate and closing circuit, the combined floodgate normally opened auxiliary contact of auxiliary reclay KM1 is connected in parallel，In the coil of described separating brake broken string supervisory relay KA2 and sub-gate circuit, the separating brake normally opened auxiliary contact of auxiliary reclay KM2 is connected in parallel，One normally closed contact KA2.1 and the remote signalling contact DTU-YX003 broken string in series main website remote signalling loop of described close a floodgate broken string one normally closed contact KA1.1 of supervisory relay KA1 and separating brake broken string supervisory relay KA2，The instruction loop, another normally closed contact KA2.2 and the on-the-spot display lamp YR of broken string broken string in series scene of another normally closed contact KA1.2 and separating brake broken string supervisory relay KA2 of the described broken string supervisory relay KA1 that closes a floodgate，Instruction loop, described broken string scene、Broken string main website remote signalling loop is all connected in parallel with closing circuit.
Preferably, described long-range switching circuit on the spot includes that a distant place switches switch SA, on the spot switch knob SB1, DTU control splice grafting point, on the spot opening button SB2, DTU control tapping point on the spot and once switchs auxiliary contact QF1, described switch knob on the spot SB1, DTU control splice grafting point is connected in parallel after rear one end passes sequentially through the normally closed contact QF1.1 of the coil of combined floodgate auxiliary reclay KM1, once switch auxiliary contact QF1 and is connected to the negative pole of DC source bus, and the other end is then switched the way switch passage of switch SA on the spot and is connected to the positive pole of DC source bus by a distant place；Described opening button SB2 on the spot, DTU control tapping point is connected in parallel after rear one end passes sequentially through the normal opened contact QF1.2 of the coil of separating brake auxiliary reclay KM2, once switch auxiliary contact QF1 and is connected to the negative pole of DC source bus, and the other end is then switched another way switch passage of switch SA on the spot and is connected to the positive pole of DC source bus by a distant place；Self-sustaining contact one end of the normally opened auxiliary contact of combined floodgate auxiliary reclay KM1 is connected with the positive pole of DC source bus, the other end is by passing sequentially through the coil of combined floodgate auxiliary reclay KM1, once it is connected to the negative pole of DC source bus after the normally closed contact QF1.1 of switch auxiliary contact QF1, self-sustaining contact one end of the normally opened auxiliary contact of separating brake auxiliary reclay KM2 is connected with the positive pole of DC source bus, the other end is by passing sequentially through the coil of separating brake auxiliary reclay normally opened auxiliary contact KM2, once it is connected to the negative pole of DC source bus after the normal opened contact QF1.2 of switch auxiliary contact QF1.
Preferably, described sub-gate circuit is additionally provided with trip protection contact, described trip protection contact and sub-gate circuit are connected in parallel between the normally opened auxiliary contact of separating brake auxiliary reclay KM2.
Preferably, described closing circuit and sub-gate circuit connect once switch auxiliary contact QF2 the most jointly, and described once switch auxiliary contact QF2 normally closed contact QF2.1 be connected in series in closing circuit, described once switch auxiliary contact QF2 normal opened contact QF2.2 be connected in series in sub-gate circuit.
Preferably, described instruction loop of closing a floodgate includes combined floodgate display lamp HG, described separating brake instruction loop includes separating brake display lamp HR, described instruction loop of closing a floodgate, separating brake instruction loop connect once switch auxiliary contact QF3 the most jointly, and described once switch auxiliary contact QF3 normally closed contact QF3.1 be connected in series in combined floodgate instruction loop in, described once switch auxiliary contact QF3 normal opened contact QF3.2 be connected in series in separating brake instruction loop in.
Preferably, described main website switching signal loop includes remote signalling contact DTU-YX001, main website sub-gate signal loop includes remote signalling contact DTU-YX002, described main website switching signal loop and main website sub-gate signal loop connect once switch auxiliary contact QF4 the most jointly, and described once switch auxiliary contact QF4 normally closed contact QF4.1 be connected in series in main website switching signal loop, described once switch auxiliary contact QF4 normal opened contact QF4.2 be connected in series in main website sub-gate signal loop.
Preferably, described power distribution network ring main unit controls loop and also includes two air switch ZK, after described long-range switching circuit on the spot, closing circuit, sub-gate circuit, combined floodgate instruction loop, separating brake instruction loop, main website switching signal loop and main website sub-gate signal loop are connected in parallel, one end is connected to DC source bus by an air switch ZK
Positive pole, the other end are connected to the negative pole of DC source bus by another air switch ZK.
nullThe present invention has the power distribution network ring main unit control loop of broken string function for monitoring and has an advantage that the present invention passes through to increase the broken string supervisory relay KA1 that closes a floodgate、Separating brake broken string supervisory relay KA2、Remote signalling contact DTU-YX003 and the on-the-spot display lamp YR of broken string，The broken string supervisory relay KA1 and separating brake broken string supervisory relay KA2 that closes a floodgate all includes coil and two normally closed contacts，Coil and the normally opened auxiliary contact of combined floodgate auxiliary reclay KM1 of combined floodgate broken string supervisory relay KA1 are connected in parallel，Coil and the normally opened auxiliary contact of separating brake auxiliary reclay KM2 of separating brake broken string supervisory relay KA2 are connected in parallel，Close a floodgate a normally closed contact KA2.1 and the remote signalling contact DTU-YX003 broken string in series main website remote signalling loop of broken string one normally closed contact KA1.1 of supervisory relay KA1 and separating brake broken string supervisory relay KA2，Another normally closed contact KA1.2 and another normally closed contact KA2.2 of separating brake broken string supervisory relay KA2 of combined floodgate broken string supervisory relay KA1 and instruction loop, display lamp YR broken string in series scene, broken string scene，Instruction loop, broken string scene、Broken string main website remote signalling loop is all connected in parallel with closing circuit，Control loop for power distribution network ring main unit and add control loop template field monitor and distant place alarm function，Give innovatively a distant place and on the spot two ways control loop abnormal conditions and monitor method，Thoroughly solve the most on-the-spot or distant place warning signal causes tour personnel to find in time and a difficult problem for processing controls circuit defect.The information of control loop template is sent to power distribution automation main station system by remote signalling mode, for power distribution network dispatcher, the supervision and remote manipulation that control loop are provided reliable basis, improve the correctness of power distribution network dispatcher's remote manipulation, improving power distribution automation practical operation key index, in order to advance, whole nation Distribution Automation Construction, power distribution network are intelligent, automatization level is significant.
Accompanying drawing explanation
Fig. 1 is the schematic diagram that embodiment of the present invention power distribution network ring main unit controls loop.
Detailed description of the invention
nullAs shown in Figure 1，The present embodiment has the power distribution network ring main unit of broken string function for monitoring and controls loop and include being connected in parallel to the long-range switching circuit on the spot of DC source bus、Closing circuit、Sub-gate circuit、Close a floodgate and indicate loop、Separating brake instruction loop、Main website switching signal loop and main website sub-gate signal loop，Closing circuit is serially connected with the combined floodgate normally opened auxiliary contact of auxiliary reclay KM1 and closing coil HQ，Sub-gate circuit is serially connected with the separating brake normally opened auxiliary contact of auxiliary reclay KM2 and switching winding TQ，And the coil of combined floodgate auxiliary reclay KM1、The coil of separating brake auxiliary reclay KM2 is serially connected with on the spot remotely in switching circuit respectively，It is characterized in that: power distribution network ring main unit controls loop and also includes the broken string supervisory relay KA1 that closes a floodgate、Separating brake broken string supervisory relay KA2、Remote signalling contact DTU-YX003 and the on-the-spot display lamp YR of broken string，The broken string supervisory relay KA1 and separating brake broken string supervisory relay KA2 that closes a floodgate all includes coil and two normally closed contacts，In the coil of combined floodgate broken string supervisory relay KA1 and closing circuit, the combined floodgate normally opened auxiliary contact of auxiliary reclay KM1 is connected in parallel，In the coil of separating brake broken string supervisory relay KA2 and sub-gate circuit, the separating brake normally opened auxiliary contact of auxiliary reclay KM2 is connected in parallel，Close a floodgate a normally closed contact KA2.1 and the remote signalling contact DTU-YX003 broken string in series main website remote signalling loop of broken string one normally closed contact KA1.1 of supervisory relay KA1 and separating brake broken string supervisory relay KA2，Another normally closed contact KA1.2 and another normally closed contact KA2.2 of separating brake broken string supervisory relay KA2 of combined floodgate broken string supervisory relay KA1 and instruction loop, display lamp YR broken string in series scene, broken string scene，Instruction loop, broken string scene、Broken string main website remote signalling loop is all connected in parallel with closing circuit.
In the present embodiment, remotely switching circuit includes that a distant place switches switch SA, on the spot switch knob SB1, DTU control splice grafting point, on the spot opening button SB2, DTU control tapping point on the spot and once switchs auxiliary contact QF1 on the spot, switch knob SB1, DTU control splice grafting point is connected in parallel after rear one end passes sequentially through the normally closed contact QF1.1 of the coil of combined floodgate auxiliary reclay KM1, once switch auxiliary contact QF1 and is connected to the negative pole of DC source bus on the spot, and the other end is then switched the way switch passage of switch SA on the spot and is connected to the positive pole of DC source bus by a distant place；Opening button SB2, DTU control tapping point are connected in parallel after rear one end passes sequentially through the normal opened contact QF1.2 of the coil of separating brake auxiliary reclay KM2, once switch auxiliary contact QF1 and are connected to the negative pole of DC source bus on the spot, and the other end is then switched another way switch passage of switch SA on the spot and is connected to the positive pole of DC source bus by a distant place；Self-sustaining contact one end of the normally opened auxiliary contact of combined floodgate auxiliary reclay KM1 is connected with the positive pole of DC source bus, the other end is by passing sequentially through the coil of combined floodgate auxiliary reclay KM1, once it is connected to the negative pole of DC source bus after the normally closed contact QF1.1 of switch auxiliary contact QF1, self-sustaining contact one end of the normally opened auxiliary contact of separating brake auxiliary reclay KM2 is connected with the positive pole of DC source bus, the other end is by passing sequentially through the coil of separating brake auxiliary reclay KM2, once it is connected to the negative pole of DC source bus after the normal opened contact QF1.2 of switch auxiliary contact QF1.A distant place switches switch SA on the spot for switching a distant place/control on the spot, splice grafting point is controlled by switch knob SB1 or DTU on the spot, the coil of combined floodgate auxiliary reclay KM1 obtains electric adhesive and retaining contact based on the combined floodgate normally opened auxiliary contact of auxiliary reclay KM1 realizes self-sustaining, the normally opened auxiliary contact of combined floodgate auxiliary reclay KM1 closes, and closing coil HQ obtains electric adhesive and controls once to switch combined floodgate.Tapping point is controlled by opening button SB2 on the spot or DTU, separating brake auxiliary reclay KM2 obtains electric adhesive and retaining contact based on the separating brake normally opened auxiliary contact of auxiliary reclay KM2 realizes self-sustaining, the normally opened auxiliary contact of separating brake auxiliary reclay KM2 closes, and switching winding TQ obtains electric adhesive and controls once to switch separating brake.In the present embodiment, once switch auxiliary contact QF1 comprises normally closed contact QF1.1 and normal opened contact QF1.2, occur in pairs in controlling loop, realize lock-in control logic function, once the function of switch auxiliary contact QF2～once switch auxiliary contact QF4 is with once to switch auxiliary contact QF1 identical, therefore repeats no more below.
In the present embodiment, sub-gate circuit is additionally provided with trip protection contact, trip protection contact and sub-gate circuit are connected in parallel between the normally opened auxiliary contact of separating brake auxiliary reclay KM2.Trip protection contact is under circuit failure condition; distribution terminal (or protection device) output tripping operation control instruction; realize trip protection function, trip protection contact, the normal opened contact QF2.2 trip protection in series loop of switching winding TQ, once switch auxiliary contact QF2.
In the present embodiment, closing circuit and sub-gate circuit connect once switch auxiliary contact QF2 the most jointly, and the normally closed contact QF2.1 once switching auxiliary contact QF2 is connected in series in closing circuit, once the normal opened contact QF2.2 of switch auxiliary contact QF2 is connected in series in sub-gate circuit.
In the present embodiment, close a floodgate and indicate loop to include combined floodgate display lamp HG, separating brake instruction loop includes separating brake display lamp HR, close a floodgate and indicate loop, separating brake instruction loop the most jointly to connect once switch auxiliary contact QF3, and the normally closed contact QF3.1 once switching auxiliary contact QF3 is connected in series in combined floodgate instruction loop, during once the normal opened contact QF3.2 of switch auxiliary contact QF3 is connected in series in separating brake instruction loop.
In the present embodiment, main website switching signal loop includes remote signalling contact DTU-YX001, main website sub-gate signal loop includes remote signalling contact DTU-YX002, main website switching signal loop and main website sub-gate signal loop connect once switch auxiliary contact QF4 the most jointly, and the normally closed contact QF4.1 once switching auxiliary contact QF4 is connected in series in main website switching signal loop, once the normal opened contact QF4.2 of switch auxiliary contact QF4 is connected in series in main website sub-gate signal loop.
In the present embodiment, power distribution network ring main unit controls loop and also includes two air switch ZK, after remotely switching circuit, closing circuit, sub-gate circuit, combined floodgate instruction loop, separating brake instruction loop, main website switching signal loop and main website sub-gate signal loop are connected in parallel on the spot, one end is connected to the positive pole of DC source bus, the other end by an air switch ZK and is connected to the negative pole of DC source bus by another air switch ZK.
Seeing Fig. 1, the present embodiment includes lower column circuits the most successively:
(1) combined floodgate keeps loop: the self-sustaining contact of combined floodgate auxiliary reclay KM1, the coil of combined floodgate auxiliary reclay KM1, once in series combined floodgate of the normally closed contact QF1.1 three of switch auxiliary contact QF1 keep loop.(2) closing circuit on the spot: switch knob SB1, once the normally closed contact QF1.1 three of switch auxiliary contact QF1 constitute closing circuit on the spot on the spot.(3) the normally closed contact QF1.1 three remote control in series closing circuit of remote control closing circuit: DTU control splice grafting point, once switch auxiliary contact QF1.(4) the normal opened contact QF1.2 three remote control in series sub-gate circuit of remote control sub-gate circuit: DTU control tapping point, once switch auxiliary contact QF1.(5) sub-gate circuit on the spot: on the spot opening button SB2, once switch the normal opened contact QF1.2 three sub-gate circuit on the spot in series of auxiliary contact QF1。(6) separating brake keeps loop: the self-sustaining contact of separating brake auxiliary reclay KM2, the coil of separating brake auxiliary reclay KM2, once the normal opened contact QF1.2 separating brake in series of switch auxiliary contact QF1 keep loop.(7) closing circuit: the normally opened auxiliary contact of combined floodgate auxiliary reclay KM1, the normally closed contact QF2.1 closing circuit in series of closing coil HQ, once switch auxiliary contact QF2.(8) close a floodgate broken string monitoring circuit: the combined floodgate broken string coil of supervisory relay KA1, closing coil HQ, once the normally closed contact QF2.1 of switch auxiliary contact QF2 broken string monitoring circuit (9) trip protection loop of closing a floodgate in series: trip protection contact, the normal opened contact QF2.2 trip protection in series loop of switching winding TQ, once switch auxiliary contact QF2.(10) sub-gate circuit: the normally opened auxiliary contact of separating brake auxiliary reclay KM2, the normal opened contact QF2.2 sub-gate circuit in series of switching winding TQ, once switch auxiliary contact QF2.(11) separating brake broken string monitoring circuit: the separating brake broken string coil of supervisory relay KA1, the normal opened contact QF2.2 separating brake in series broken string monitoring circuit of switching winding TQ, once switch auxiliary contact QF2.(12) combined floodgate instruction loop: combined floodgate display lamp HG, once the normally closed contact QF3.1 of switch auxiliary contact QF3 instruction loop of closing a floodgate in series；(13) separating brake instruction loop: the normal opened contact QF3.2 separating brake in series instruction loop of separating brake display lamp HR, once switch auxiliary contact QF3；(14) main website switching signal loop: the normally closed contact QF4.1 main website in series switching signal loop of remote signalling contact DTU-YX001, once switch auxiliary contact QF4；(15) main website sub-gate signal loop: the normal opened contact QF4.2 main website in series sub-gate signal loop of remote signalling contact DTU-YX002, once switch auxiliary contact QF4.(16) broken string main website remote signalling loop: a normally closed contact KA2.1 and the remote signalling contact DTU-YX003 broken string in series main website remote signalling loop of close a floodgate broken string one normally closed contact KA1.1 of supervisory relay KA1 and separating brake broken string supervisory relay KA2.(17) the instruction loop, another normally closed contact KA2.2 and the on-the-spot display lamp YR of broken string broken string in series scene of broken string scene instruction loop: another normally closed contact KA1.2 and separating brake broken string supervisory relay KA2 of the broken string supervisory relay KA1 that closes a floodgate.In above-mentioned loop, the broken string monitoring circuit that closes a floodgate, separating brake broken string monitoring circuit, instruction loop, broken string scene, broken string loop, four, main website remote signalling loop are that the present embodiment is for realizing the Key Circuit that power distribution network ring main unit broken string monitors.
The operation principle in the power distribution network ring main unit control loop that the present embodiment has broken string function for monitoring is as follows: in normal operation, when once switch is in open position, closing circuit once switchs the normally closed contact QF2.1 Guan Bi of auxiliary contact QF2, the coil of combined floodgate broken string supervisory relay KA1 obtains electric, the separating brake display lamp HR in separating brake instruction loop is bright, when once switch is in closing position, closing circuit once switchs the normal opened contact QF2.2 Guan Bi of auxiliary contact QF2, the coil of separating brake broken string supervisory relay KA2 obtains electric, close a floodgate and indicate the separating brake display lamp HG in loop bright.When sub-gate circuit or closing circuit broken string occur, combined floodgate broken string supervisory relay KA1, the separating brake broken string whole dead electricity of supervisory relay KA2, the normally closed contact (KA1.1 and KA1.2) of combined floodgate broken string supervisory relay KA1 and the normally closed contact (KA2.1 and KA2.2) of separating brake broken string supervisory relay KA2 all close, the broken string scene display lamp YR in instruction loop, broken string scene is bright, separating brake display lamp HQ all extinguishes with combined floodgate display lamp HR such that it is able to monitor control loop template situation at the scene.Simultaneously, combined floodgate broken string supervisory relay KA1 normally closed contact KA1.2, the normally closed contact KA2.2 series connection of separating brake broken string supervisory relay KA2 access remote signalling contact DTU-YX003 as control loop template signal, uploading control loop template warning signal to distribution main website by remote signalling contact DTU-YX003, main website can receive control loop template alarm.Therefore, the combined floodgate broken string monitoring circuit that increased by the present embodiment, separating brake broken string monitoring circuit, instruction loop, broken string scene, broken string loop, four, main website remote signalling loop, control loop template field monitor and distant place alarm can be increased, for power distribution network operations staff, ring main unit scene can be maked an inspection tour offer effectively to monitor means, for power distribution network dispatcher, the supervision and remote manipulation offer that control loop are reliably judged, the raising auxiliary tone personnel success rate to ring main unit remote manipulation.
It should be noted that, in the present embodiment, numbering DTU-YX001～the DTU-YX003 of remote signalling contact are only used for distinguishing different remote signalling contacts, and it being understood not to the model of remote signalling contact, the remote signalling contact of numbering DTU-YX001～DTU-YX003 is for communicating with distribution main website.Certainly, those skilled in the art can be selected to realize various models and the remote signalling contact of specification that warning signal is uploaded as required, does not repeats them here.
The above is only the preferred embodiment of the present invention, and protection scope of the present invention is not limited merely to above-described embodiment, and all technical schemes belonged under thinking of the present invention belong to protection scope of the present invention.It should be pointed out that, for those skilled in the art, some improvements and modifications without departing from the principles of the present invention, these improvements and modifications also should be regarded as protection scope of the present invention.
Claims (6)
- null1. a power distribution network ring main unit with broken string function for monitoring controls loop，Including the long-range on the spot switching circuit being connected in parallel to DC source bus、Closing circuit、Sub-gate circuit、Close a floodgate and indicate loop、Separating brake instruction loop、Main website switching signal loop and main website sub-gate signal loop，Described closing circuit is serially connected with the combined floodgate normally opened auxiliary contact of auxiliary reclay KM1 and closing coil HQ，Described sub-gate circuit is serially connected with the separating brake normally opened auxiliary contact of auxiliary reclay KM2 and switching winding TQ，And the coil of combined floodgate auxiliary reclay KM1、The coil of separating brake auxiliary reclay KM2 is serially connected with on the spot remotely in switching circuit respectively，It is characterized in that: described power distribution network ring main unit controls loop and also includes the broken string supervisory relay KA1 that closes a floodgate、Separating brake broken string supervisory relay KA2、Remote signalling contact DTU-YX003 and the on-the-spot display lamp YR of broken string，The described broken string supervisory relay KA1 and separating brake broken string supervisory relay KA2 that closes a floodgate all includes coil and two normally closed contacts，In the coil of the described broken string supervisory relay KA1 that closes a floodgate and closing circuit, the combined floodgate normally opened auxiliary contact of auxiliary reclay KM1 is connected in parallel，In the coil of described separating brake broken string supervisory relay KA2 and sub-gate circuit, the separating brake normally opened auxiliary contact of auxiliary reclay KM2 is connected in parallel，One normally closed contact KA2.1 and the remote signalling contact DTU-YX003 broken string in series main website remote signalling loop of described close a floodgate broken string one normally closed contact KA1.1 of supervisory relay KA1 and separating brake broken string supervisory relay KA2，The instruction loop, another normally closed contact KA2.2 and the on-the-spot display lamp YR of broken string broken string in series scene of another normally closed contact KA1.2 and separating brake broken string supervisory relay KA2 of the described broken string supervisory relay KA1 that closes a floodgate，Instruction loop, described broken string scene、Broken string main website remote signalling loop is all connected in parallel with closing circuit；Described closing circuit and sub-gate circuit connect once switch auxiliary contact QF2 the most jointly, and described once switch auxiliary contact QF2 normally closed contact QF2.1 be connected in series in closing circuit, described once switch auxiliary contact QF2 normal opened contact QF2.2 be connected in series in sub-gate circuit.
- The power distribution network ring main unit with broken string function for monitoring the most according to claim 1 controls loop, it is characterized in that: described long-range switching circuit on the spot includes that a distant place switches switch SA on the spot, switch knob SB1 on the spot, DTU controls splice grafting point, opening button SB2 on the spot, DTU control tapping point and once switch auxiliary contact QF1, described switch knob SB1 on the spot, DTU control splice grafting point is connected in parallel rear one end and passes sequentially through the coil of combined floodgate auxiliary reclay KM1, once it is connected to the negative pole of DC source bus after the normally closed contact QF1.1 of switch auxiliary contact QF1, the other end is then switched a way switch passage of switch SA on the spot and is connected to the positive pole of DC source bus by a distant place；Described opening button SB2 on the spot, DTU control tapping point is connected in parallel after rear one end passes sequentially through the normal opened contact QF1.2 of the coil of separating brake auxiliary reclay KM2, once switch auxiliary contact QF1 and is connected to the negative pole of DC source bus, and the other end is then switched another way switch passage of switch SA on the spot and is connected to the positive pole of DC source bus by a distant place；Self-sustaining contact one end of the normally opened auxiliary contact of combined floodgate auxiliary reclay KM1 is connected with the positive pole of DC source bus, the other end is by passing sequentially through the coil of combined floodgate auxiliary reclay KM1, once it is connected to the negative pole of DC source bus after the normally closed contact QF1.1 of switch auxiliary contact QF1, self-sustaining contact one end of the normally opened auxiliary contact of separating brake auxiliary reclay KM2 is connected with the positive pole of DC source bus, the other end is by passing sequentially through the coil of separating brake auxiliary reclay KM2, once it is connected to the negative pole of DC source bus after the normal opened contact QF1.2 of switch auxiliary contact QF1.
- The power distribution network ring main unit with broken string function for monitoring the most according to claim 2 controls loop; it is characterized in that: described sub-gate circuit is additionally provided with trip protection contact, described trip protection contact and sub-gate circuit are connected in parallel between the normally opened auxiliary contact of separating brake auxiliary reclay KM2.
- The power distribution network ring main unit with broken string function for monitoring the most according to claim 3 controls loop, it is characterized in that: described instruction loop of closing a floodgate includes combined floodgate display lamp HG, described separating brake instruction loop includes separating brake display lamp HR, described instruction loop of closing a floodgate, separating brake instruction loop connect once switch auxiliary contact QF3 the most jointly, and described once switch auxiliary contact QF3 normally closed contact QF3.1 be connected in series in combined floodgate instruction loop in, described once switch auxiliary contact QF3 normal opened contact QF3.2 be connected in series in separating brake instruction loop in.
- The power distribution network ring main unit with broken string function for monitoring the most according to claim 4 controls loop, it is characterized in that: described main website switching signal loop includes remote signalling contact DTU-YX001, main website sub-gate signal loop includes remote signalling contact DTU-YX002, described main website switching signal loop and main website sub-gate signal loop connect once switch auxiliary contact QF4 the most jointly, and described once switch auxiliary contact QF4 normally closed contact QF4.1 be connected in series in main website switching signal loop, the normal opened contact QF4.2 of described once switch auxiliary contact QF4 is connected in series in main website sub-gate signal loop.
- 6. control loop according to the power distribution network ring main unit with broken string function for monitoring described in any one in Claims 1 to 5, it is characterized in that: described power distribution network ring main unit controls loop and also includes two air switch ZK, after described long-range switching circuit on the spot, closing circuit, sub-gate circuit, combined floodgate instruction loop, separating brake instruction loop, main website switching signal loop and main website sub-gate signal loop are connected in parallel, one end is connected to the positive pole of DC source bus, the other end by an air switch ZK and is connected to the negative pole of DC source bus by another air switch ZK.
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| CN201510222853.4A CN104882795B (en) | 2015-05-05 | 2015-05-05 | Power distribution network ring main unit control circuit having broken line monitoring function |
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| CN201510222853.4A CN104882795B (en) | 2015-05-05 | 2015-05-05 | Power distribution network ring main unit control circuit having broken line monitoring function |
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| CN104882795B true CN104882795B (en) | 2017-01-11 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109884521B (en) * | 2019-03-28 | 2024-03-12 | 山东钢铁股份有限公司 | Circuit breaker divide-shut brake control circuit broken wire monitoring alarm circuit |
| CN110146773A (en) * | 2019-06-20 | 2019-08-20 | 广东电网有限责任公司 | A kind of monitoring of control loop and fault coverage judgement system |
| CN110514961B (en) * | 2019-08-27 | 2023-12-08 | 宁波天安（集团）股份有限公司 | Ring main unit fault monitoring control device |
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