CN210517802U - Double-incoming-wire reactive compensation system and automatic current acquisition circuit - Google Patents
Double-incoming-wire reactive compensation system and automatic current acquisition circuit Download PDFInfo
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- CN210517802U CN210517802U CN201921606191.0U CN201921606191U CN210517802U CN 210517802 U CN210517802 U CN 210517802U CN 201921606191 U CN201921606191 U CN 201921606191U CN 210517802 U CN210517802 U CN 210517802U
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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Abstract
The utility model relates to a two inlet wire reactive compensation systems and electric current automatic acquisition circuit. The system comprises a first incoming line, a second incoming line and a third incoming line, wherein the first incoming line is connected with a main line through a first switch; the second incoming line is connected with the main line through a second switch; the first switch is connected in series with the primary side of the first current transformer; the second switch is connected in series with the primary side of the second current transformer; still be provided with reactive compensation controller on the main line, the current acquisition end of this controller is parallelly connected with first collection branch road and second collection branch road, and each gathers the secondary side of the current transformer that the branch road series corresponds, and each gathers the branch road and all establishes ties and be used for the contact that opens circuit rather than opening circuit, and each current transformer's secondary side all parallels is used for the short circuit contact rather than the short circuit. When the first incoming line works, the second current transformer is in short circuit, and when the second incoming line works, the first current transformer is in short circuit, so that automatic and accurate acquisition of current by the reactive compensation controller is realized, and the reactive compensation controller can accurately switch the number of capacitance compensation circuits.
Description
Technical Field
The utility model relates to a two inlet wire reactive compensation systems and electric current automatic acquisition circuit belongs to low pressure distribution system technical field.
Background
In the two inlet wire systems of conventional distribution system low pressure, including two inlet wire cabinets, 1# inlet wire cabinet and 2# inlet wire cabinet, these two inlet wire cabinets divide the operation in columns, after the power failure of one of them inlet wire cabinet, the inlet wire switch of this inlet wire cabinet is disconnected, closes the inlet wire switch of another inlet wire cabinet, guarantees the reliable continuous power supply of power load.
In order to realize the improvement of the power factor, the capacitance compensation controller needs to collect the sampling current of the power inlet wire of the inlet wire cabinet in a working state to accurately switch the number of capacitance compensation circuits; therefore, it is necessary to design a relevant circuit for realizing this function.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a two inlet wire reactive compensation systems and electric current automatic acquisition circuit, the hardware architecture of a system and circuit is proposed for realizing the automatic acquisition control of capacitance compensation controller electric current.
In order to achieve the above object, the present invention provides a dual-inlet reactive power compensation system, which includes a first inlet, a second inlet, and a main line, wherein the first inlet is connected to the main line through a first switch, and the second inlet is connected to the main line through a second switch; the main line is also provided with a reactive compensation controller, and the first switch is connected with the primary side of the first current transformer in series; the second switch is connected with the primary side of a second current transformer in series, a first collecting branch and a second collecting branch are connected in parallel at the current collecting end of the reactive compensation controller, the first collecting branch is connected with the secondary side of the first current transformer in series, the second collecting branch is connected with the secondary side of the second current transformer in series, the first collecting branch is connected with a first open contact for opening the first collecting branch in series, and the secondary side of the first current transformer is connected with a first short contact for short-circuiting the first current transformer in parallel; the second acquisition branch is connected in series with a second open contact for opening the second acquisition branch, and the secondary side of the second current transformer is connected in parallel with a second short contact for short-circuiting the second current transformer.
The beneficial effects are that: when the system works on the first incoming line, the second current transformer is short-circuited through the second short-circuit contact, and meanwhile, the second current transformer is disconnected to the reactive compensation controller to collect current; when the second incoming line works, the first current transformer is short-circuited through the first short-circuit contact, and meanwhile, the first current transformer is disconnected to the reactive compensation controller to collect current; the automatic and accurate acquisition of the current by the reactive compensation controller is realized, so that the reactive compensation controller accurately switches the capacitance compensation circuit number, and the secondary side of the current transformer can be prevented from being opened while the current transformer is in short circuit, thereby ensuring the normal operation of the current transformer.
Further, in order to realize accurate switching control, the first short-circuit contact is a normally open auxiliary contact of the second switch; the second short circuit contact is a normally open auxiliary contact of the first switch, and the first open circuit contact is a normally closed auxiliary contact of the second switch; the second open contact is a normally closed auxiliary contact of the first switch.
Further, in order to realize accurate switching control, the first short-circuit contact is a normally closed auxiliary contact of the first switch; the second short circuit contact is a normally closed auxiliary contact of the second switch, and the first open circuit contact is a normally open auxiliary contact of the first switch; the second open contact is a normally open auxiliary contact of the second switch.
Furthermore, in order to realize load power supply, at least two outgoing lines are connected to the main line.
Furthermore, in order to facilitate management, the first switch, the first current transformer, the second short-circuit contact and the second open-circuit contact are arranged in the first incoming line cabinet, the second switch, the second current transformer, the first short-circuit contact and the first open-circuit contact are arranged in the second incoming line cabinet, and the reactive compensation controller is arranged in the reactive compensation cabinet.
In addition, the utility model also provides an automatic current acquisition circuit, including first switch and first current transformer, second switch and second current transformer, the primary side of first switch and first current transformer is established ties, and the primary side of second switch and second current transformer is established ties, still includes the first collection branch road and the second collection branch road that are used for with the parallelly connected current collection end of reactive compensation controller, the secondary side of first current transformer is established ties to the first collection branch road, the secondary side of second current transformer is established ties to the second collection branch road, and first collection branch road is established ties and is used for the first disconnection contact that opens circuit of first collection branch road, and the secondary side of first current transformer is parallelly connected with the first short circuit contact that is used for short circuit first current transformer; the second acquisition branch is connected in series with a second open contact for opening the second acquisition branch, and the secondary side of the second current transformer is connected in parallel with a second short contact for short-circuiting the second current transformer.
The beneficial effects are that: when the system works on the first incoming line, the second current transformer is short-circuited through the second short-circuit contact, and meanwhile, the second current transformer is disconnected to a sampling current loop of the reactive compensation controller; when the second incoming line works, the first current transformer is short-circuited through the first short-circuit contact, and the second current transformer is disconnected to the reactive compensation controller sampling current loop, so that automatic and accurate acquisition of current by the reactive compensation controller is realized, the reactive compensation controller accurately switches the number of capacitance compensation circuits, and the secondary side of the current transformer can be prevented from being open in a short circuit mode while the current transformer is short-circuited, and the normal operation of the current transformer is guaranteed.
Further, in order to realize accurate switching control, the first short-circuit contact is a normally open auxiliary contact of the second switch; the second short circuit contact is a normally open auxiliary contact of the first switch, and the first open circuit contact is a normally closed auxiliary contact of the second switch; the second open contact is a normally closed auxiliary contact of the first switch.
Further, in order to realize accurate switching control, the first short-circuit contact is a normally closed auxiliary contact of the first switch; the second short circuit contact is a normally closed auxiliary contact of the second switch, and the first open circuit contact is a normally open auxiliary contact of the first switch; the second open contact is a normally open auxiliary contact of the second switch.
Drawings
Fig. 1 is a schematic diagram of the double-inlet reactive power compensation system of the present invention;
fig. 2 is the utility model discloses electric capacity compensation controller current acquisition automatic control circuit.
Detailed Description
Two inlet wire reactive compensation system embodiments:
the double-incoming-line reactive power compensation system provided by this embodiment includes, as shown in fig. 1, a main line and a 1# low-voltage incoming cabinet (i.e., an incoming cabinet of an i-section bus or a first incoming cabinet), a 2# low-voltage incoming cabinet (i.e., an incoming cabinet of a ii-section bus or a second incoming cabinet), an outgoing cabinet and a low-voltage reactive power compensation cabinet (i.e., a reactive power compensation cabinet) that are arranged on the main line, where the 1# low-voltage incoming cabinet and the 2# low-voltage incoming cabinet share one reactive power compensation cabinet.
The 1# low-voltage incoming cabinet comprises a first incoming line, a first switch (1QF) and a first current transformer (1TAa), the 2# low-voltage incoming cabinet comprises a second incoming line, a second switch (2QF) and a second current transformer (2TAa), the reactive compensation cabinet comprises a compensation controller (namely a capacitance compensation controller), and at least two outgoing lines are arranged in the cabinet.
First inlet wire, second inlet wire and the compensation controller between be connected through electric current automatic acquisition circuit connection, specifically do: the first incoming line is connected with the main line through a first switch; the second incoming line is connected with the main line through a second switch; each outgoing line and the compensation controller are connected with a main line, a first switch is connected with a primary side of a first current transformer in series, a second switch is connected with a primary side of a second current transformer in series, a current acquisition end of the reactive compensation controller is connected with a first acquisition branch and a second acquisition branch in parallel, the first acquisition branch is connected with a secondary side of the first current transformer in series, the second acquisition branch is connected with a secondary side of the second current transformer in series, the first acquisition branch is connected with a first open contact in series, and the secondary side of the first current transformer is connected with a first short contact in parallel; the second acquisition branch is connected in series with a second open contact, and the secondary side of the second current transformer is connected in parallel with a second short contact.
The first short-circuit contact is used for short-circuiting the first current transformer when the reactive compensation controller collects the current value of the second current transformer, the second short-circuit contact is used for short-circuiting the second current transformer when the reactive compensation controller collects the current value of the first current transformer, the first open-circuit contact is used for opening the first collection branch circuit when the reactive compensation controller collects the current value of the second current transformer, and the second open-circuit contact is used for opening the second collection branch circuit when the reactive compensation controller collects the current value of the first current transformer. Because I section generating line inlet cabinet and II section generating line inlet cabinets can not simultaneous working, can only work for one of them inlet cabinet, when this inlet cabinet trouble, another inlet cabinet work, consequently the electric current that so design circuit can make reactive compensation controller gather is more accurate.
In the present embodiment, as shown in fig. 2, the first short-circuit contact is a normally open auxiliary contact 2DL0 of the second switch; the second short-circuit contact is a normally-open auxiliary contact 1DL0 of the first switch; the first open circuit contact is a normally closed auxiliary contact 2DL1 of the second switch; the second breaking contact is the normally closed auxiliary contact 1DL1 of the first switch. When the system is not in operation, 1QF and 2QF are in an open state at the same time, a first short circuit contact and a second short circuit contact are in an open state, a first open circuit contact and a second open circuit contact are in a closed state, when the system is in operation, when the 1QF is switched on, a capacitor cabinet compensation controller collects a 1TAa sampling current, and meanwhile, a 1DL0 normally open contact is switched to a closed point to automatically short-connect the 2TAa sampling current, so that the 2TAa secondary side is prevented from being opened, and a 1DL1 is switched to a switched-on point to disconnect a second current transformer to a second collection branch of a reactive compensation controller; when 2QF is switched on, the capacitor box compensation controller collects the sampling current of 2TAa, meanwhile, 2DL0 changes to a closing point, the sampling current of 1TAa is automatically short-circuited, the 1TAa secondary side is prevented from being opened, and the 2DL1 changes to a opening point, and the first current transformer is disconnected from the first collection branch of the reactive compensation controller.
Specifically, for convenience of management, in the double-incoming-line reactive power compensation system in the above embodiment, as shown in fig. 2, the normally open auxiliary contact 1DL0 of the first switch and the normally closed auxiliary contact 1DL1 of the first switch are disposed in a # 1 low-voltage incoming line cabinet, and the normally open auxiliary contact 2DL0 of the second switch and the normally closed auxiliary contact 2DL1 of the second switch are disposed in a # 2 low-voltage incoming line cabinet.
Of course, as another embodiment, the first short-circuit contact may also be a normally-closed auxiliary contact of the first switch; the second short circuit contact can also be a normally closed auxiliary contact of the second switch, and the first open circuit contact is a normally open auxiliary contact of the first switch; the second open contact is a normally open auxiliary contact of the second switch. When the system works, when the 1QF is switched on, the capacitor cabinet compensation controller collects the sampling current of the 1TAa, the first short-circuit contact is switched off, the first open-circuit contact is switched on, the second short-circuit contact and the second open-circuit contact are kept unchanged, the sampling current of the 2TAa is automatically short-connected, the secondary side of the 2TAa is prevented from being switched off, and the second current transformer can be switched off to a second collection branch of the reactive compensation controller; when 2QF is switched on, the capacitor box compensation controller collects the sampling current of 2TAa, the second short-circuit contact is disconnected, the second open-circuit contact is closed, the first short-circuit contact and the first open-circuit contact are kept unchanged, the sampling current of 1TAa is automatically short-circuited, the secondary side of 1TAa is prevented from being opened, and the first current transformer can be disconnected from the first collection branch of the reactive compensation controller. So arranged, then for the convenience of management, can set up first short circuit contact and first break contact in the first inlet cabinet, and second short circuit contact and second break contact are set up in the second inlet cabinet.
The utility model discloses in, the electric capacity compensation controller (through the mode of switching) is gathered 2 sections inlet wire electric currents, and arbitrary moment only gathers the electric current that is in operating condition's inlet wire, opens circuit the sampling current of non-operating section inlet wire cabinet simultaneously, under the condition that inlet wire operating/non-operating condition changed, can the automatic switch into gather the electric current of the inlet wire to work, avoids the current transformer secondary side of non-operating section inlet wire to open a way simultaneously, improves sampling current's exactness. The control circuit has simple, practical and reasonable design and wide application range, and meets the requirements of safe, reliable and practical operation and cost saving.
The embodiment of the current automatic acquisition circuit comprises:
the automatic current collection circuit provided by the embodiment comprises a first switch, a first current transformer, a second switch, a second current transformer, a first collection branch and a second collection branch, wherein the first switch is connected with the primary side of the first current transformer, the second switch is connected with the primary side of the second current transformer, the automatic current collection circuit further comprises the first collection branch and the second collection branch which are connected with a current collection end of a reactive compensation controller in parallel, the first collection branch is connected with the secondary side of the first current transformer in series, the second collection branch is connected with the secondary side of the second current transformer in series, the first collection branch is connected with a first open contact for opening the first collection branch in series, and the secondary side of the first current transformer is connected with a first short contact for short-circuiting the first current transformer in parallel; the second acquisition branch is connected in series with a second open contact for opening the second acquisition branch, and the secondary side of the second current transformer is connected in parallel with a second short contact for short-circuiting the second current transformer.
The specific connection relationship and working process of the current automatic acquisition circuit are introduced in the above embodiment of the dual-inlet reactive power compensation system, and are not described in detail here.
Claims (8)
1. A double-incoming-line reactive compensation system comprises a first incoming line, a second incoming line and a main line, wherein the first incoming line is connected with the main line through a first switch, and the second incoming line is connected with the main line through a second switch; the main line is also provided with a reactive compensation controller, and the first switch is connected with the primary side of the first current transformer in series; the reactive compensation controller is characterized in that a current collection end of the reactive compensation controller is connected with a first collection branch and a second collection branch in parallel, the first collection branch is connected with a secondary side of the first current transformer in series, the second collection branch is connected with a secondary side of the second current transformer in series, the first collection branch is connected with a first open contact for opening the first collection branch in series, and the secondary side of the first current transformer is connected with a first short contact for short-circuiting the first current transformer in parallel; the second acquisition branch is connected in series with a second open contact for opening the second acquisition branch, and the secondary side of the second current transformer is connected in parallel with a second short contact for short-circuiting the second current transformer.
2. The dual-inlet reactive compensation system according to claim 1, wherein the first short-circuit contact is a normally open auxiliary contact of a second switch; the second short circuit contact is a normally open auxiliary contact of the first switch, and the first open circuit contact is a normally closed auxiliary contact of the second switch; the second open contact is a normally closed auxiliary contact of the first switch.
3. The dual incoming line reactive compensation system of claim 1, wherein the first short circuit contact is a normally closed auxiliary contact of a first switch; the second short circuit contact is a normally closed auxiliary contact of the second switch, and the first open circuit contact is a normally open auxiliary contact of the first switch; the second open contact is a normally open auxiliary contact of the second switch.
4. The dual incoming line reactive compensation system of claim 1, 2 or 3, characterized in that at least two outgoing lines are further connected to the main line.
5. The dual-inlet reactive power compensation system of claim 2, wherein the first switch, the first current transformer, the second short contact and the second disconnection contact are disposed in a first inlet cabinet, the second switch, the second current transformer, the first short contact and the first disconnection contact are disposed in a second inlet cabinet, and the reactive power compensation controller is disposed in a reactive power compensation cabinet.
6. An automatic current acquisition circuit comprises a first switch, a first current transformer, a second switch and a second current transformer, wherein the first switch is connected with the primary side of the first current transformer in series, and the second switch is connected with the primary side of the second current transformer in series; the second acquisition branch is connected in series with a second open contact for opening the second acquisition branch, and the secondary side of the second current transformer is connected in parallel with a second short contact for short-circuiting the second current transformer.
7. The automatic current collection circuit of claim 6, wherein the first shorting contact is a normally open auxiliary contact of a second switch; the second short circuit contact is a normally open auxiliary contact of the first switch, and the first open circuit contact is a normally closed auxiliary contact of the second switch; the second open contact is a normally closed auxiliary contact of the first switch.
8. The automatic current collection circuit of claim 6, wherein the first shorting contact is a normally closed auxiliary contact of a first switch; the second short circuit contact is a normally closed auxiliary contact of the second switch, and the first open circuit contact is a normally open auxiliary contact of the first switch; the second open contact is a normally open auxiliary contact of the second switch.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921606191.0U CN210517802U (en) | 2019-09-25 | 2019-09-25 | Double-incoming-wire reactive compensation system and automatic current acquisition circuit |
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| CN201921606191.0U CN210517802U (en) | 2019-09-25 | 2019-09-25 | Double-incoming-wire reactive compensation system and automatic current acquisition circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111697631A (en) * | 2020-06-19 | 2020-09-22 | 浙江正泰新能源开发有限公司 | Reactive compensation control method, device and medium |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111697631A (en) * | 2020-06-19 | 2020-09-22 | 浙江正泰新能源开发有限公司 | Reactive compensation control method, device and medium |
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