CN207638333U - Alternating current filter cuts off circuit automatically after a kind of last line tripping - Google Patents
Alternating current filter cuts off circuit automatically after a kind of last line tripping Download PDFInfo
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- CN207638333U CN207638333U CN201721672093.8U CN201721672093U CN207638333U CN 207638333 U CN207638333 U CN 207638333U CN 201721672093 U CN201721672093 U CN 201721672093U CN 207638333 U CN207638333 U CN 207638333U
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Abstract
Cut off circuit automatically the utility model discloses alternating current filter after a kind of last line tripping, including order receive switch, point/entering-phase control device, breaker on the spot/distant place switching switch and three-phase sub-gate circuit；Order receives the input terminal of switch for receiving the alternating current filter divide-shut brake order that control interface screen issues on the spot；Order receive output end and the breaker of switch on the spot/input terminal of distant place switching switch is connected, switching switch is normally off, switch the output end of switch and divide/input terminal of entering-phase control device is connected, point/output end of entering-phase control device is connected with sub-gate circuit, the application by point/input of entering-phase control device, output end is simultaneously connected to intermediate relay switch, when last line-breaker trips, intermediate relay obtains electrical excitation, be closed by its auxiliary contact make point/bypass loop of entering-phase control device is connected, separating brake order is exported into three-phase sub-gate circuit, so that the breaker open operation success of group's filter.
Description
Technical field
The utility model is related to technical field of electric power, and in particular to alternating current filter is cut automatically after a kind of last line tripping
Except circuit.
Background technology
Certain current conversion station 500kV alternating-current fields use 2/3 mode of connection, structure diagram (to have been omitted from earthing knife-switch, CT, PT as shown in Figure 1
Etc. equipment).The current conversion station is altogether there are four valve group (pole 1 is high-end, 1 low side of pole, pole 2 are high-end, 2 low side of pole), and valve group is by dc power
It is sent in AC network after conversion by exchanging outlet；In addition, current conversion station is also configured with alternating current filter, changed for eliminating valve group
It flows the harmonic wave generated in the process, the reactive power needed for valve group is provided, while extra reactive power is for compensating AC system
Voltage；Under normal circumstances, all switches of 500kV alternating-current fields, disconnecting link are closing position, and alternating current filter provides idle except just
Meet the consumption of four valve groups, in addition extra idle also just maintenance ac bus voltage (general 525kV in prescribed limit
~535kV).
In Exchange Station control system, last circuit logic is：" this circuit is the circuit that the last item is connect with alternating-current field,
If the valve group of this line tripping, unlock will be unable to transmission power ".In actual moving process, in fact it could happen that straight-flow system
Normal transmission power and only by the method for operation of an exchange outlet transimission power, for example,
(1) first string：5011,5012,5013 it is spaced in connection status；
(2) second strings：5021,5023 it is spaced in connection status；
(3) third string：5031,5033 it is spaced in connection status；
(4) the 4th strings：5041,5042,5043 it is spaced in connection status；
(5) the 5th strings：5051,5053 in connection status, and 5052 in isolation (operation of alternating current circuit 1)；
(6) the 6th strings：5061 in connection status, and 5062,5063 in isolation (stoppage in transit of alternating current circuit 2).
For current conversion station under this method of operation, alternating current circuit 1 is the last circuit of valve group, if alternating current circuit 1 at this time is disconnected
Road device 5053 trips, and weight motor type relay auxiliary contact conducting, signal is sent to disconnected with connection by control interface screen on the spot
Road device protection screen is then sent through valve unit protection interface screen, starts bipolar four valve groups ESOF sequences (direct current stoppage in transit).It stops transport in direct current
Afterwards, alternating current filter control interface screen (hereinafter referred to as 6MD66) on the spot receives the excision group filter of direct current station control transmission
Order, group's filter complete resection that tripping is put into operation before.
The process of exchange group filter distant place separating brake：After 6MD66 sends out separating brake order, the protection of filter group is reached
Screen, then arrive switch operating case ontology, by a breaker on the spot/distant place switching handle S8 after return to filter group protection screen
1, alternating current filter control interface screen on the spot is returned, it is specific as shown in Figure 2.Point/entering-phase control device (hereinafter referred to as PSD
Device：Make the dynamic and static contact of breaker punish in the specified phase angle of system voltage waveform by certain means to close, make power equipment
The power system technology of switching to itself and system shock minimum) selection handle it can be selected whether other
Road, due to the adjustment of dc power, filter group meeting frequent switching, therefore filter field minor group switches under normal operation
PSD devices are put into, to reduce the overcurrent and overvoltage in breaking-closing operating transient process, to extend power equipment
Service life and the stability for improving entire electric system.
According to the operation principle of PSD devices, big group of busbar voltage of filter must be acquired and be used as with reference to measuring, known through system
Do not go out the best divide-shut brake moment of breaker.However after last line-breaker trips, direct current valve group is stopped transport, big group of filter
Busbar voltage is also reduced to 0, cause PSD apparatus functions fail, corresponding alternating current filter group breaker can not automatic brake separating, no
Meet system operation logic.
Invention content
The purpose of the utility model is to overcome above-mentioned the deficiencies in the prior art, exchanged after a kind of last line tripping is provided
Filter cuts off circuit automatically, to cut off all group's filters automatically after realizing last line tripping.
To achieve the above object, the technical solution of the utility model is：
Alternating current filter cuts off circuit automatically after a kind of last line tripping, including order receive switch, point/switching angle control
Device processed, breaker on the spot/distant place switching switch and three-phase sub-gate circuit；It is normally open that order, which receives switch, and order connects
The input terminal of switch is received for receiving the alternating current filter divide-shut brake order that control interface screen issues on the spot, when order receives switch
When receiving separating brake order, order receives switch and is closed；The output end that order receives switch is connected with the input terminal of switching switch
Connect, breaker on the spot/distant place switching switch be normally off, switch switch output end and point/entering-phase control device it is defeated
Enter end to be connected, point/output end of entering-phase control device is connected with sub-gate circuit, in described point/entering-phase control device
Input, output end and be connected to intermediate relay, form bypass；When last line-breaker trips, intermediate relay obtains electric
Excitation, point/conducting of entering-phase control device bypass loop, realize the breaker open operation of group's filter.
The sub-gate circuit is three-phase sub-gate circuit.
Compared with prior art, advantage is the utility model：
The utility model by point/input of entering-phase control device, output end and be connected to intermediate relay switch, when
When Exchange Station control system ACSC sentences last line-breaker tripping, intermediate relay obtains electrical excitation, is connected by its auxiliary contact
Formed point/entering-phase control device bypass loop, by the alternating current filter separating brake order that control interface screen issues on the spot export to
In three-phase sub-gate circuit so that breaker open operation success, to realize due to point/entering-phase control device can not collect reference
Voltage and group's filter is cut off in the case of disabler automatically；Simultaneously because the intermediate relay auxiliary contact circuit is simultaneously
The by-passing signal line of connection, so on normal circuit without influence, nor affecting on alternating current filter, control interface screen issues on the spot
Order normal transmission.
Description of the drawings
Fig. 1 is certain current conversion station 500kV alternating-current field wiring diagrams；
Signal circuit figure when Fig. 2 is group's filter distant place separating brake of the prior art；
Alternating current filter cuts off the signal in circuit automatically after the last line tripping that Fig. 3 provides for the utility model embodiment
Figure.
Specific implementation mode
The content of the utility model is described in further details with reference to the accompanying drawings and detailed description.
Embodiment：
As shown in fig.3, cutting off showing for circuit automatically for alternating current filter after last line tripping provided in this embodiment
Be intended to, including order receive switch, PSD devices, breaker on the spot/distant place switches switch S8 and three-phase sub-gate circuit.Wherein,
It is normally open that order, which receives switch, and order receives the input terminal of switch for receiving the divide-shut brake order that 6MD66 is issued, works as life
When reception switch being enabled to receive separating brake order CMD OFF, order receives make and break contact and is closed；Order receives switch CMD OFF's
Output end and breaker on the spot/input terminal of distant place switching switch S8 is connected, switching switch S8 is normally off, switches and switchs
The output end of S8 is connected with the input terminal of PSD devices, and the output end of PSD devices is connected with three-phase sub-gate circuit.Normal
In the case of, the separating brake order that 6MD66 is issued will be returned by being transmitted out to three-phase separating brake after the PSD devices selection best separating brake moment
In the 630.635.640 terminals on road so that the breaker open operation success of group's filter.However when last line-breaker trips
Afterwards, direct current valve group is stopped transport, and big group of busbar voltage of filter is 0, and PSD apparatus functions is caused to fail, and corresponding alternating current filter is small
Group breaker can not automatic brake separating, be unsatisfactory for system operation logic.For this purpose, the present embodiment is in the input of PSD devices, output end and connects
There is intermediate relay K22, forms bypass, when Exchange Station, control system ACSC sentences last line-breaker tripping, intermediate relay
K22 obtains electrical excitation, forms PSD device bypass loops by the conducting of its auxiliary contact 1,2, the separating brake order that 6MD66 is issued is defeated
Go out into the 630.635.640 terminals of three-phase sub-gate circuit so that the success of the breaker open operation of group's filter, to realize by
Reference voltage can not be collected in PSD devices and cuts off group's filter in the case of disabler automatically；Simultaneously because in this
Between relay K22 auxiliary contacts circuit be in parallel by-passing signal line, so being nor affected on without influence on normal circuit
The order normal transmission that 6MD66 is issued.
Specifically, in the present embodiment, the PSD02 devices that PSD devices are produced using Siemens Company, mainly to
It realizes quick split-phase separating brake or combined floodgate when each phase voltage curent change minimum of breaker, electric power primary equipment is rushed with reducing
It hits.
Above-described embodiment simply to illustrate that the utility model technical concepts and features, the purpose is to be to allow this field
Interior those of ordinary skill can understand the content of the utility model and implement according to this, can not limit the utility model with this
Protection domain.The equivalent changes or modifications that every essence according to the utility model content is made, should all cover in this reality
With in novel protection domain.
Claims (2)
1. alternating current filter cuts off circuit automatically after a kind of last line tripping, including order receives switch, divides/entering-phase control
Device, breaker on the spot/distant place switching switch and three-phase sub-gate circuit；It is normally open that order, which receives switch, and order receives
The input terminal of switch connects for receiving the alternating current filter divide-shut brake order that control interface screen issues on the spot when order receives switch
When receiving divide-shut brake order, order receives switch and is closed；The output end that order receives switch is connected with the input terminal of switching switch
Connect, breaker on the spot/distant place switching switch be normally off, breaker on the spot/distant place switching switch output end and point/close a floodgate
The input terminal of angle control is connected, point/output end of entering-phase control device is connected with sub-gate circuit, feature exists
In, in the input of described point/entering-phase control device, output end and be connected to intermediate relay, formed bypass；When last circuit is disconnected
When the device tripping of road, intermediate relay obtains electrical excitation, point/conducting of entering-phase control device bypass loop, realize group's filter
Breaker open operation.
2. alternating current filter cuts off circuit automatically after last line tripping as described in claim 1, which is characterized in that described point
Lock circuit is three-phase sub-gate circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721672093.8U CN207638333U (en) | 2017-12-05 | 2017-12-05 | Alternating current filter cuts off circuit automatically after a kind of last line tripping |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721672093.8U CN207638333U (en) | 2017-12-05 | 2017-12-05 | Alternating current filter cuts off circuit automatically after a kind of last line tripping |
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| Publication Number | Publication Date |
|---|---|
| CN207638333U true CN207638333U (en) | 2018-07-20 |
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| CN201721672093.8U Active CN207638333U (en) | 2017-12-05 | 2017-12-05 | Alternating current filter cuts off circuit automatically after a kind of last line tripping |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110829420A (en) * | 2019-11-15 | 2020-02-21 | 中国南方电网有限责任公司超高压输电公司广州局 | Switching-on/off state judgment device for AC filter of convertor station group |
| CN112103929A (en) * | 2020-09-24 | 2020-12-18 | 中国南方电网有限责任公司超高压输电公司曲靖局 | Phase selection and switching-off method for AC filter of same-tower double-circuit DC converter station |
| CN115021244A (en) * | 2022-06-10 | 2022-09-06 | 国网辽宁省电力有限公司锦州供电公司 | Control device and method for preventing frequent switching on and off of user power supply switch during starting |
-
2017
- 2017-12-05 CN CN201721672093.8U patent/CN207638333U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110829420A (en) * | 2019-11-15 | 2020-02-21 | 中国南方电网有限责任公司超高压输电公司广州局 | Switching-on/off state judgment device for AC filter of convertor station group |
| CN110829420B (en) * | 2019-11-15 | 2024-06-04 | 中国南方电网有限责任公司超高压输电公司广州局 | Switching state judging device for alternating current filter of converter station group |
| CN112103929A (en) * | 2020-09-24 | 2020-12-18 | 中国南方电网有限责任公司超高压输电公司曲靖局 | Phase selection and switching-off method for AC filter of same-tower double-circuit DC converter station |
| CN112103929B (en) * | 2020-09-24 | 2022-03-22 | 中国南方电网有限责任公司超高压输电公司曲靖局 | Phase selection and switching-off method for AC filter of same-tower double-circuit DC converter station |
| CN115021244A (en) * | 2022-06-10 | 2022-09-06 | 国网辽宁省电力有限公司锦州供电公司 | Control device and method for preventing frequent switching on and off of user power supply switch during starting |
| CN115021244B (en) * | 2022-06-10 | 2024-04-26 | 国网辽宁省电力有限公司锦州供电公司 | Control device and method for preventing user power switch from frequently opening and closing during startup |
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