CN217824745U

CN217824745U - Energy taking circuit of 10KV circuit breaker

Info

Publication number: CN217824745U
Application number: CN202221780088.XU
Authority: CN
Inventors: 王永利; 宋文国; 逄博; 赵博; 姜伟; 林穆; 周俊良
Original assignee: Jilin Power Supply Co Of State Grid Jilinsheng Electric Power Supply Co
Current assignee: Jilin Power Supply Co Of State Grid Jilinsheng Electric Power Supply Co
Priority date: 2022-07-11
Filing date: 2022-07-11
Publication date: 2022-11-15
Anticipated expiration: 2032-07-11

Abstract

The utility model belongs to an energy taking circuit, in order to solve current 10kV circuit breaker energy taking implementation method, adopt electromagnetic type voltage transformer, it is bulky, the weight is heavy and the fault rate is higher, adopt capacitor voltage transformer, if the saturation problem when solving the thunderbolt test, can greatly increased equipment volume's technical problem, a 10KV circuit breaker energy taking circuit is provided, utilize three high-voltage capacitor respectively with three low-voltage capacitance impedance partial pressure, combine the principle of three inductance and three low-voltage capacitance series resonance, the high-voltage alternating current that will follow three-phase power output converts low-voltage alternating current into, convert stable direct current output into through power management module again, carry stable direct current for the load, do not use electromagnetic type voltage transformer and capacitor voltage transformer, can form the less energy taking device of volume, easily realize the degree of depth and fuse inverter unit's output is used for connecting external load.

Description

Energy taking circuit of 10KV circuit breaker

Technical Field

The utility model belongs to an energy taking circuit, concretely relates to 10KV circuit breaker energy taking circuit.

Background

Currently, the most common way for a 10kV circuit breaker to take energy is through an electromagnetic voltage transformer. However, the electromagnetic voltage transformer is large in size and heavy in weight, cannot realize deep fusion with a switch pole, and has a high failure rate. Therefore, as shown in fig. 1, another energy taking device based on the principle of a capacitor voltage transformer is also proposed, in which an intermediate transformer T is provided, and the problem of saturation of the transformer during voltage withstand and lightning impulse tests of the equipment needs to be considered during design. There are two solutions to the saturation problem, namely, increasing the saturation point of the transformer to 7 times of the rated voltage or adding a protection device on the primary side of the intermediate transformer T. Both of the two schemes can greatly increase the volume of the equipment, so that the energy taking device is difficult to realize deep fusion.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve current 10kV circuit breaker and get in can the implementation method, adopt electromagnetic type voltage transformer, bulky, the weight is heavy and the fault rate is higher, adopt capacitive voltage transformer, if will solve the saturation problem when the thunderbolt is experimental, can the technical problem of greatly increased equipment volume, provide a 10kV circuit breaker gets can the circuit.

In order to achieve the above object, the utility model provides a following technical scheme:

the energy obtaining circuit of the 10KV circuit breaker is characterized by comprising an A-phase high-voltage capacitor C1, a B-phase high-voltage capacitor C3, a C-phase high-voltage capacitor C5, an A-phase low-voltage capacitor C2, a B-phase low-voltage capacitor C4, a C-phase low-voltage capacitor C6, an A-phase inductor L1, a B-phase inductor L2, a C-phase inductor L3 and a power management module M;

the anode of the A-phase high-voltage capacitor C1 is used for being connected with the anode of an A-phase power supply of an external three-phase power supply N, the cathode of the A-phase high-voltage capacitor C1, the input end of the A-phase inductor L1 and the anode of the A-phase low-voltage capacitor C2 are connected, and the cathode of the A-phase low-voltage capacitor C2 is grounded; the output end of the A-phase inductor L1 is connected with an alternating-current voltage input end corresponding to A in the power management module M;

the positive electrode of the B-phase high-voltage capacitor C3 is used for being connected with the positive electrode of a B-phase power L2 source of the three-phase power supply N, the negative electrode of the B-phase high-voltage capacitor C3, the input end of the B-phase power L2 inductor and the positive electrode of the B-phase low-voltage capacitor C4 are connected, and the negative electrode of the B-phase low-voltage capacitor C4 is grounded; the output end of the B-phase power L2 inductor is connected with the alternating voltage input end corresponding to B in the power management module M;

the positive electrode of the C-phase high-voltage capacitor C5 is used for being connected with the positive electrode of a C-phase power supply of the three-phase power supply N, the negative electrode of the C-phase high-voltage capacitor C5, the input end of the C-phase inductor L3 and the positive electrode of the C-phase low-voltage capacitor C6 are connected, and the negative electrode of the C-phase low-voltage capacitor C6 is grounded; the output end of the C-phase inductor L3 is connected with the alternating voltage input end corresponding to the C in the power management module M;

and the power management module M is grounded at the common ends corresponding to the phase A, the phase B and the phase C and is used for converting the input alternating current voltage into stable direct current voltage and outputting the stable direct current voltage.

Further, in order to enable the power management module M to output a stable direct current, the power management module M may include a rectifying unit, a filtering unit, and an inverting unit, which are connected in sequence;

the input end of the rectification unit is respectively connected with the input ends of the A-phase, the B-phase and the C-phase alternating current voltages in the power management module M, and the output end of the inversion unit is used for being connected with an external load.

Further, the input voltages of the phase a, the phase B and the phase C of the power management module M are all AC110V.

Further, the output voltage of the power management module M is DC24V.

Further, in order to expand the application range of the power management module M and improve the applicability of the energy-taking circuit, the power management module M further includes a plurality of reserved terminals.

Further, the power management module M further includes a super capacitor charging terminal.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model relates to a 10KV circuit breaker circuit of getting can utilizes three high-voltage capacitor respectively with three low-voltage capacitor impedance partial pressure, combines three inductance and three low-voltage capacitor series resonance's principle, will convert the high-voltage alternating current from three-phase power output into low-voltage alternating current, converts stable direct current output into through power management module again, carries stable direct current for the load, the utility model discloses do not use electromagnetic type voltage transformer and capacitive voltage transformer, can form the less ability device of getting of volume, easily realize the degree of depth and fuse.

2. The utility model discloses well power management module specifically can comprise rectifier unit, filter unit and contravariant unit, realizes converting the low pressure alternating current of input into stable direct current output after rectification, filtering and contravariant.

3. The utility model provides a power management module still is equipped with a plurality of reservation terminals, makes power management module can expand more functions according to in-service use needs, has improved the utility model discloses a suitability.

4. The utility model provides a power management module output side still is provided with super capacitor charging terminal, has further expanded the utility model discloses an application scope.

Drawings

Fig. 1 is a schematic diagram of an energy-taking device based on the principle of a capacitor voltage transformer in the prior art;

fig. 2 is a schematic diagram of an embodiment of an energy-taking circuit of a 10KV circuit breaker.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are not limitations of the present invention.

The utility model provides a 10KV circuit breaker can circuit, has saved the intermediate transformer, just the utility model discloses a can circuit of getting can the degree of depth merge in switch utmost point post, simultaneously, this can circuit get can power big, efficient.

As shown in fig. 2, a 10KV circuit breaker energy-taking circuit includes an a-phase high-voltage capacitor C1, a B-phase high-voltage capacitor C3, a C-phase high-voltage capacitor C5, an a-phase low-voltage capacitor C2, a B-phase low-voltage capacitor C4, a C-phase low-voltage capacitor C6, an a-phase inductor L1, a B-phase inductor L2, a C-phase inductor L3, and a power management module M, where the three phases have the same overall structure and are specific:

the positive pole of the A-phase high-voltage capacitor C1 is connected with the positive pole of an A-phase power supply of an external three-phase power supply N, the negative pole of the A-phase high-voltage capacitor C1 is respectively connected with the positive pole of an A-phase low-voltage capacitor C2 and the input end of an A-phase inductor L1, the negative pole of the A-phase low-voltage capacitor C2 is grounded, and the output end of the A-phase inductor L1 is connected with an alternating-current voltage input end terminal a1 corresponding to A in the power management module M. The positive pole of the B-phase high-voltage capacitor C3 is connected with the positive pole of a B-phase power L2 source of an external three-phase power N, the negative pole of the B-phase high-voltage capacitor C3 is respectively connected with the positive pole of a B-phase low-voltage capacitor C4 and the input end of a B-phase power L2 inductor, the negative pole of the B-phase low-voltage capacitor C4 is grounded, and the output end of the B-phase power L2 inductor is connected with an alternating-current voltage input end terminal B1 corresponding to A in the power management module M. The positive pole of the C-phase high-voltage capacitor C5 is connected with the positive pole of a C-phase power supply of an external three-phase power supply N, the negative pole of the C-phase high-voltage capacitor C5 is respectively connected with the positive pole of a C-phase low-voltage capacitor C6 and the input end of a C-phase inductor L3, the negative pole of the C-phase low-voltage capacitor C6 is grounded, and the output end of the C-phase inductor L3 is connected with an alternating-current voltage input end terminal C1 corresponding to C in the power supply management module M.

The common terminal corresponding to a, the common terminal corresponding to B, and the common terminal corresponding to C in the power management module M are all grounded, in this embodiment, each common terminal is denoted as an n terminal, and the power management module M functions to convert an input ac voltage into a stable dc voltage, output the stable dc voltage to a load, and provide the stable dc voltage for the load.

The above technical scheme principle of the utility model, input the three-phase high pressure of three phase current N output the utility model discloses in getting the three-phase high voltage capacitance input end (anodal) of ability circuit, the A looks high pressure with three phase current N output respectively promptly, B looks high pressure and C looks high pressure are input A looks high pressure electric capacity C1 respectively, in B looks high pressure electric capacity C3 and the C looks high pressure electric capacity C5, A looks high pressure electric capacity C1, B looks high pressure electric capacity C3 and C looks high pressure electric capacity C5 respectively with A looks low pressure electric capacity C2, B looks low pressure electric capacity C4 and C looks low pressure electric capacity C6 impedance partial pressure, recycle A looks inductance L1, B looks electric L2 sense and the three sensitive component of C looks inductance L3 and A looks low pressure electric capacity C2, B looks low pressure electric capacity C4 and the three capacitive element resonance's of C looks low pressure electric capacity C6 principle, output stable low pressure is exchanged (110V) to the corresponding input a1 of A of power management module M, the corresponding input B1 of B, the corresponding input C1 of C. The power management module M converts the input 110V low-voltage alternating current into stable direct current output through the processes of rectification, filtering, inversion and the like, and supplies the stable direct current output to a load. The input end a1, the input end B1 and the input end C1 of the power management module M are alternating voltage input ends and are respectively connected with the output ends of three inductive elements, namely an A-phase inductor L1, a B-phase inductor L2 and a C-phase inductor L3. The n terminal is a common input terminal and is grounded. In fig. 2, the a2 terminal, the b2 terminal and the c2 terminal of the power management module M are reserved terminals, and can be specifically set according to actual use requirements. The V0 terminal and the G0 terminal are dc output terminals connected to a load, and in this embodiment, are used for outputting a 24V dc voltage. The C + terminal and the C-terminal are super capacitor charging terminals.

The above is only the embodiment of the present invention, and is not the limitation of the protection scope of the present invention, all the equivalent structure changes made in the contents of the specification and the drawings, or the direct or indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. The utility model provides a 10KV circuit breaker circuit of getting can which characterized in that: the system comprises an A-phase high-voltage capacitor C1, a B-phase high-voltage capacitor C3, a C-phase high-voltage capacitor C5, an A-phase low-voltage capacitor C2, a B-phase low-voltage capacitor C4, a C-phase low-voltage capacitor C6, an A-phase inductor L1, a B-phase inductor L2, a C-phase inductor L3 and a power management module M;

the positive electrode of the A-phase high-voltage capacitor C1 is used for being connected with the positive electrode of an A-phase power supply of an external three-phase power supply N, the negative electrode of the A-phase high-voltage capacitor C1, the input end of the A-phase inductor L1 and the positive electrode of the A-phase low-voltage capacitor C2 are connected, and the negative electrode of the A-phase low-voltage capacitor C2 is grounded; the output end of the A-phase inductor L1 is connected with an alternating-current voltage input end corresponding to A in the power management module M;

and the power management module M is grounded with the public ends corresponding to the phase A, the phase B and the phase C, and is used for converting the input alternating current voltage into stable direct current voltage and outputting the stable direct current voltage.

2. The 10KV breaker energy-taking circuit of claim 1, wherein: the power management module M comprises a rectifying unit, a filtering unit and an inverting unit which are connected in sequence;

3. The 10KV breaker energy-taking circuit of claim 1 or 2, wherein: the input voltage of the A phase, the B phase and the C phase of the power management module M is AC110V.

4. The 10KV breaker energy-taking circuit of claim 3, wherein: the output voltage of the power management module M is DC24V.

5. The power take-off circuit of the 10KV circuit breaker as claimed in claim 4, wherein: the power management module M further comprises a plurality of reserved terminals.

6. The 10KV breaker energy-taking circuit of claim 5, wherein: the power management module M further comprises a super capacitor charging terminal.