CN221282850U - Filtering compensation system and intelligent energy box transformer substation electric system - Google Patents
Filtering compensation system and intelligent energy box transformer substation electric system Download PDFInfo
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- CN221282850U CN221282850U CN202322852572.XU CN202322852572U CN221282850U CN 221282850 U CN221282850 U CN 221282850U CN 202322852572 U CN202322852572 U CN 202322852572U CN 221282850 U CN221282850 U CN 221282850U
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Abstract
The utility model discloses a filtering compensation system and an intelligent energy box transformer substation electrical system, wherein the system comprises: a load isolation switch connected with the power grid; the first end of the incoming line cabinet is connected with the other end of the load isolating switch; one end of the metering cabinet is connected with the second end of the incoming line cabinet; the first end of the outlet cabinet is connected with the other end of the metering cabinet; the vacuum circuit breaker is connected with the second end of the outlet cabinet at one end; one end of the isolating switch is connected with the other end of the vacuum circuit breaker; the primary side of the phase-shifting transformer is connected with the other end of the isolating switch, and an auxiliary winding of the phase-shifting transformer is connected with electric equipment of the transformer substation; the first current sampling device is arranged on a connecting circuit between the load isolating switch and the power grid and is used for collecting a power grid side current signal; and the LSVG device is connected with the first current sampling device and performs filtering compensation processing according to the current signal at the power grid side. The filtering compensation treatment can be timely carried out, so that pollution to the power grid is avoided.
Description
Technical Field
The utility model relates to the technical field of filtering compensation processing of phase-shifting transformers, in particular to a filtering compensation system and an intelligent energy box transformer electrical system of the filtering compensation system.
Background
In the related art, when a Low Voltage STATIC VAR Generator (LSVG) device is used to perform filtering compensation processing on a phase-shifting transformer, harmonic processing and reactive compensation cannot be responded in time generally, so that residual harmonic accumulated at an auxiliary winding of the phase-shifting transformer and a phase-shifting edge can be generated and returned to a power grid, pollution is caused to the power grid, and further local power supply companies take fine measures or even power failure is rectified.
Disclosure of utility model
The utility model aims to solve the technical problems, and provides a filtering compensation system, which can timely perform filtering compensation processing according to a power grid side current signal by collecting the power grid side current signal at the wire inlet side of a power grid, so as to avoid pollution to the power grid.
The technical scheme adopted by the utility model is as follows:
A filter compensation system comprising: the load isolating switch is connected with the power grid at one end; the first end of the incoming line cabinet is connected with the other end of the load isolating switch; the metering cabinet is connected with the second end of the incoming line cabinet at one end; the first end of the outlet cabinet is connected with the other end of the metering cabinet; the vacuum circuit breaker is connected with the second end of the outgoing line cabinet at one end; the device comprises an isolating switch, a phase-shifting transformer, an auxiliary winding and a transformer station, wherein one end of the isolating switch is connected with the other end of the vacuum circuit breaker, the primary side of the phase-shifting transformer is connected with the other end of the isolating switch, and the auxiliary winding of the phase-shifting transformer is connected with electric equipment of the transformer station; the first current sampling device is arranged on a connecting circuit between the load isolating switch and the power grid and is used for collecting power grid side current signals; and the LSVG device is arranged between the auxiliary winding of the phase-shifting transformer and the electric equipment, and is connected with the first current sampling device and used for carrying out filtering compensation processing according to the power grid side current signal.
Specifically, the first current sampling device is a current transformer.
Specifically, the filter compensation system further includes: the high-voltage lightning arrester is arranged between the load isolating switch and the power grid.
Specifically, the filtering compensation system further includes: the high-voltage transformer is arranged between the load isolating switch and the power grid.
An intelligent energy box transformer electrical system based on a filtering compensation system, comprising: the filtering compensation system; a main winding breaker, wherein one end of the main winding breaker is connected with the secondary side of the phase-shifting transformer; a main winding contactor, wherein one end of the main winding contactor is connected with the other end of the main winding short circuit; the full-bridge rectifier is connected with the other end of the main winding contactor at one side; the two ends of the balance capacitor are respectively connected with the other side of the full-bridge rectifier to be grounded; one end of the discharge resistor is connected with one end of the balance capacitor; one end of the direct current contactor is connected with the other end of the discharge resistor, and the other end of the direct current contactor is connected with the other end of the balance capacitor; and one side of the charging pile rectifying cabinet is respectively connected with one end of the discharging resistor and the other end of the direct current contactor, and the other side of the charging pile rectifying cabinet is connected with a terminal to be charged.
Specifically, the intelligent energy box transformer substation electric system based on the filtering compensation system further comprises: the second current sampling device is arranged on a connecting circuit between one end of the discharging resistor and one end of the balance capacitor.
Specifically, the second current sampling device is a current transformer.
Specifically, the intelligent energy box transformer substation electric system based on the filtering compensation system further comprises: and the voltage sampling device is respectively connected with one end of the discharge resistor and the other end of the direct current contactor.
The voltage sampling device is a voltage transformer.
The utility model has the beneficial effects that:
according to the utility model, the power grid side current signal is collected at the wire inlet side of the power grid, and filtering compensation processing can be timely carried out according to the power grid side current signal, so that pollution to the power grid is avoided.
Drawings
FIG. 1 is a schematic diagram of a filtering compensation system according to an embodiment of the present utility model;
Fig. 2 is a schematic structural diagram of an intelligent power box transformer substation electrical system based on a filtering compensation system according to an embodiment of the present utility model.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Fig. 1 is a schematic structural diagram of a filtering compensation system according to an embodiment of the utility model.
As shown in fig. 1, a filter compensation system 100 according to an embodiment of the present utility model may include: load disconnector QL, inlet cabinet 110, metering cabinet 120, outlet cabinet 130, vacuum circuit breaker QF1, disconnector QS, phase-shifting transformer T, first current sampling device 140 and LSVG device 150.
One end of the load isolating switch QL is connected with the power grid; the first end of the incoming line cabinet 110 is connected with the other end of the load isolating switch QL; one end of the metering cabinet 120 is connected with the second end of the incoming cabinet 110; the first end of the outlet cabinet 130 is connected with the other end of the metering cabinet 120; one end of the vacuum circuit breaker QF1 is connected with the second end of the outlet cabinet 130; one end of the isolating switch QS is connected with the other end of the vacuum circuit breaker QF 1; the primary side of the phase-shifting transformer T is connected with the other end of the isolating switch QS, and an auxiliary winding of the phase-shifting transformer T is connected with electric equipment of a transformer substation; the first current sampling device 140 is arranged on a connecting circuit between the load isolating switch QL and the power grid and is used for collecting a power grid side current signal; the LSVG device 150 is disposed between the auxiliary winding of the phase-shifting transformer T and the electric device, and the LSVG device 150 is connected to the first current sampling device 140, for performing filtering compensation processing according to the power grid side current signal.
The first current sampling device 140 is a current transformer.
In one embodiment of the present utility model, as shown in fig. 1, the filter compensation system 100 further includes: a high-voltage lightning arrester BL is arranged between the load isolating switch QL and the power grid
In one embodiment of the present utility model, as shown in fig. 1, the filter compensation system 100 further includes: the high-voltage transformer PT is arranged between the load isolating switch QL and the power grid.
Specifically, the auxiliary windings of the phase-shifting transformer T provide three-phase and single-phase power for the charging station, such as a high-voltage room auxiliary power, a transformer room auxiliary power, a dc power cabinet auxiliary power, a pile terminal cabinet auxiliary power, etc., and a harmonic source is formed due to the interaction of the complex inductance of the station power and the capacitive load and other nonlinear loads, and the first current sampling device 140 collects a grid-side current signal at the line-in side of the grid (e.g., 10 kV) and rapidly sends the grid-side current signal to the LSVG device 150. At this time, the LSVG device 150 receives the power grid side current signal to amplify the power grid side current signal, and starts the internal PMOS current source to generate currents with equal current amounts and opposite directions, so that harmonic currents are offset at the source to achieve the effect of eliminating the harmonic, and the filtering compensation process is good in effect, fast in response speed and high in precision, and the harmonic meets the national standard GB/T14549-1993.
In summary, the filter compensation system according to the embodiment of the utility model includes: the device comprises a load isolating switch, an incoming line cabinet, a metering cabinet, an outgoing line cabinet, a vacuum circuit breaker, an isolating switch, a phase-shifting transformer, a first current sampling device and an LSVG device, wherein one end of the load isolating switch is connected with a power grid; the first end of the incoming line cabinet is connected with the other end of the load isolating switch; one end of the metering cabinet is connected with the second end of the incoming line cabinet; the first end of the outlet cabinet is connected with the other end of the metering cabinet; one end of the vacuum circuit breaker is connected with the second end of the outlet cabinet; one end of the isolating switch is connected with the other end of the vacuum circuit breaker; the primary side of the phase-shifting transformer is connected with the other end of the isolating switch, and an auxiliary winding of the phase-shifting transformer is connected with electric equipment of the transformer substation; the first current sampling device is arranged on a connecting circuit between the load isolating switch and the power grid and is used for collecting a power grid side current signal; the LSVG device is arranged between the auxiliary winding of the phase-shifting transformer and the electric equipment, is connected with the first current sampling device and is used for carrying out filtering compensation processing according to the current signal at the power grid side. Therefore, the filtering compensation processing can be timely carried out according to the power grid side current signal by collecting the power grid side current signal at the wire inlet side of the power grid, so that the pollution to the power grid is avoided.
Corresponding to the filtering compensation system of the embodiment, the utility model further provides an intelligent energy box transformer substation electric system based on the filtering compensation system.
As shown in fig. 2, the intelligent power box transformer electric system based on the filtering compensation system of the present utility model may include: the full-bridge rectifier comprises a filtering compensation system 100, a main winding breaker QF2, a main winding contactor KM1, a full-bridge rectifier D1, a balance capacitor C1, a discharging resistor R1, a direct current contactor KM2 and a charging pile rectifier cabinet 200.
One end of the main winding breaker QF2 is connected with the secondary side of the phase-shifting transformer; one end of the main winding contactor KM1 is connected with the other end of the main winding short circuit; one side of the full-bridge rectifier D1 is connected with the other end of the main winding contactor KM 1; two ends of the balance capacitor C1 are respectively connected with the other side of the full-bridge rectifier D1 to be grounded; one end of the discharging resistor R1 is connected with one end of the balance capacitor C1; one end of a direct current contactor KM2 is connected with the other end of the discharge resistor R1, and the other end of the direct current contactor KM2 is connected with the other end of the balance capacitor C1; one side of the charging pile rectifying cabinet 200 is respectively connected with one end of the discharging resistor R1 and the other end of the direct current contactor KM2, and the other side of the charging pile rectifying cabinet 200 is connected with a terminal to be charged.
The main winding breaker QF2 can be a molded case breaker, wherein the main winding breaker QF2 can automatically disconnect a power supply circuit when the main circuit fails, so that personal safety is guaranteed, the AC output power supply circuit can be automatically disconnected when the main circuit is short-circuited, and meanwhile, a normally open contact of the main winding breaker QF2 is output to the PLC for logic judgment. The direct current contactor KM2 can be frequently controlled by a PLC logic to cut off a power supply main circuit, so that weak current control and strong current control are realized. After the main circuit stops working, the discharging resistor R1 and the direct current contactor KM2 discharge the balance capacitor C1, so that maintenance personnel are prevented from getting an electric shock.
In one embodiment of the present utility model, as shown in fig. 2, the intelligent power box transformer electric system based on the filtering compensation system further comprises: a second current sampling means 300. The second current collecting device 300 is disposed on a connection circuit between one end of the discharging resistor R1 and one end of the balancing capacitor C1. The second current sampling device may be a current transformer.
The second current sampling device 300 monitors the total direct current output to realize switching of the main winding contactor KM1 and the direct current contactor KM2, and monitors the current change to realize energy-saving control and load stable state of the PLC on the whole heat dissipation fan.
In one embodiment of the present utility model, as shown in fig. 2, the intelligent power box transformer electric system based on the filtering compensation system further comprises: voltage sampling device 400. The voltage sampling device 400 is connected to one end of the discharge resistor R1 and the other end of the dc contactor KM2, and the voltage sampling device 400 may be a voltage transformer.
The voltage sampling device 400 monitors that the dc contactor KM2 is first pulled in, and starts to pull in the main winding contactor KM1 when the capacitor voltage reaches the dc voltage of 720V, so that the capacitor can be prevented from being damaged due to no pre-charging.
Specifically, after the power grid voltage is sent to the primary side of the phase-shifting transformer T, 4 groups of 282V alternating current voltages are realized on the secondary side of the phase-shifting transformer T, 564V alternating current voltages are obtained in a 2-string 2-parallel mode, after the main winding breaker QF2 is manually switched on, auxiliary contact feedback signals of the main winding contactor KM1 are received in a program in the PLC logic programmer, remote MMP (matrix point and play) back is performed, at the moment, the direct current contactor KM22 starts to suck and charge a rear balance capacitor C1, and when the capacitor voltage reaches 720V direct current, the main winding contactor KM1 starts to sequentially suck to enable the main circuit to start to be formally put into operation.
In summary, the intelligent power box transformer substation electrical system based on the filtering compensation system according to the present utility model includes: the device comprises a filtering compensation system, a main winding circuit breaker, a main winding contactor, a full-bridge rectifier, a balance capacitor, a discharge resistor, a direct current contactor and a charging pile rectifying cabinet, wherein one end of the main winding circuit breaker is connected with the secondary side of a phase-shifting transformer; one end of the main winding contactor is connected with the other end of the main winding short circuit; one side of the full-bridge rectifier is connected with the other end of the main winding contactor; two ends of the balance capacitor are respectively connected with the other side of the full-bridge rectifier to be grounded; one end of the discharging resistor is connected with one end of the balance capacitor; one end of the direct current contactor is connected with the other end of the discharge resistor, and the other end of the direct current contactor is connected with the other end of the balance capacitor; one side of the charging pile rectifying cabinet is respectively connected with one end of the discharging resistor and the other end of the direct current contactor, and the other side of the charging pile rectifying cabinet is connected with the terminal to be charged. Therefore, the filtering compensation processing can be timely carried out according to the power grid side current signal by collecting the power grid side current signal at the wire inlet side of the power grid, so that the pollution to the power grid is avoided.
In the description of the present utility model, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. The meaning of "a plurality of" is two or more, unless specifically defined otherwise.
In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily for the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
In addition, each functional unit in the embodiments of the present utility model may be integrated in one processing module, or each unit may exist alone physically, or two or more units may be integrated in one module. The integrated modules may be implemented in hardware or in software functional modules. The integrated modules may also be stored in a computer readable storage medium if implemented in the form of software functional modules and sold or used as a stand-alone product.
While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.
Claims (9)
1. A filter compensation system, comprising:
The load isolating switch is connected with the power grid at one end;
The first end of the incoming line cabinet is connected with the other end of the load isolating switch;
The metering cabinet is connected with the second end of the incoming line cabinet at one end;
the first end of the outlet cabinet is connected with the other end of the metering cabinet;
the vacuum circuit breaker is connected with the second end of the outgoing line cabinet at one end;
one end of the isolating switch is connected with the other end of the vacuum circuit breaker;
The primary side of the phase-shifting transformer is connected with the other end of the isolating switch, and an auxiliary winding of the phase-shifting transformer is connected with electric equipment of a transformer substation;
the first current sampling device is arranged on a connecting circuit between the load isolating switch and the power grid and is used for collecting power grid side current signals;
And the LSVG device is arranged between the auxiliary winding of the phase-shifting transformer and the electric equipment, and is connected with the first current sampling device and used for carrying out filtering compensation processing according to the power grid side current signal.
2. The filter compensation system of claim 1, wherein,
The first current sampling device is a current transformer.
3. The filter compensation system of claim 1, further comprising:
the high-voltage lightning arrester is arranged between the load isolating switch and the power grid.
4. The filter compensation system of claim 1, further comprising:
The high-voltage transformer is arranged between the load isolating switch and the power grid.
5. An intelligent power box-section electrical system based on the filter compensation system of any one of claims 1-4, comprising:
The filtering compensation system;
a main winding breaker, wherein one end of the main winding breaker is connected with the secondary side of the phase-shifting transformer;
A main winding contactor, wherein one end of the main winding contactor is connected with the other end of the main winding short circuit;
the full-bridge rectifier is connected with the other end of the main winding contactor at one side;
The two ends of the balance capacitor are respectively connected with the other side of the full-bridge rectifier to be grounded;
One end of the discharge resistor is connected with one end of the balance capacitor;
One end of the direct current contactor is connected with the other end of the discharge resistor, and the other end of the direct current contactor is connected with the other end of the balance capacitor;
And one side of the charging pile rectifying cabinet is respectively connected with one end of the discharging resistor and the other end of the direct current contactor, and the other side of the charging pile rectifying cabinet is connected with a terminal to be charged.
6. The filter compensation system-based intelligent power box substation electrical system of claim 5, further comprising:
The second current sampling device is arranged on a connecting circuit between one end of the discharging resistor and one end of the balance capacitor.
7. The intelligent power box transformer substation electrical system based on the filtering compensation system according to claim 6, wherein,
The second current sampling device is a current transformer.
8. The filter compensation system-based intelligent power box substation electrical system of claim 5, further comprising:
and the voltage sampling device is respectively connected with one end of the discharge resistor and the other end of the direct current contactor.
9. The intelligent power box transformer substation electrical system based on the filtering compensation system according to claim 8, wherein,
The voltage sampling device is a voltage transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322852572.XU CN221282850U (en) | 2023-10-24 | 2023-10-24 | Filtering compensation system and intelligent energy box transformer substation electric system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322852572.XU CN221282850U (en) | 2023-10-24 | 2023-10-24 | Filtering compensation system and intelligent energy box transformer substation electric system |
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| CN221282850U true CN221282850U (en) | 2024-07-05 |
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| CN202322852572.XU Active CN221282850U (en) | 2023-10-24 | 2023-10-24 | Filtering compensation system and intelligent energy box transformer substation electric system |
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- 2023-10-24 CN CN202322852572.XU patent/CN221282850U/en active Active
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