CN208316295U - A kind of high-voltage generator turn-to-turn insulation protective device - Google Patents

Abstract

The utility model discloses a kind of high-voltage generator turn-to-turn insulation protective devices, including there are three capacitor C1, C2, C3, each capacitor C1, C2, C3 Z1, Z2, Z3 in parallel with an impedance of releasing are in parallel；After each capacitor C1, C2, C3 are in parallel with impedance Z 1 of releasing, Z2, Z3, one end is electrically connected with high frequency one end on-off system GD1, GD2, GD3 one-to-one correspondence, the other end is commonly connected to D connecting terminal, D connecting terminal ground connection；The other end and A, B, C connecting terminal of described each high frequency on-off system GD1, GD2, GD3 connect one to one, and A, B, C connecting terminal connect one to one in generator outlet side and A, B, C three-phase electricity.The utility model solves the damage of high frequency voltage or high frequency overvoltage to generator turn-to-turn insulation, while not increasing system capacitive current, protects system and equipment safety operation.

Description

A kind of high-voltage generator turn-to-turn insulation protective device

Technical field

The utility model relates to technical field of generators, specially a kind of high-voltage generator turn-to-turn insulation protective device.

Background technique

Generator turn-to-turn insulation is the weak insulating layer of comparison, is easy not had also currently on the market by excessively high voltage breakdown There is relatively good protection scheme, the breakdown failure of turn-to-turn insulation occurs often, and turn-to-turn insulation breakdown has been primarily due to high frequency Insulation breakdown caused by voltage and high frequency overvoltage, common arrester can only over-voltage amplitude, to the limit of overvoltage frequency System is very low, does not change its frequency substantially, therefore do not have turn-to-turn insulation defencive function, the circle of transverse differential protection, residual voltage principle Between protect etc. be turn-to-turn insulation damage after occur short circuit after protection, it is therefore desirable to one kind prevents turn-to-turn insulation from being hit by high frequency voltage The equipment worn.

Utility model content

(1) the technical issues of solving

In view of the deficiencies of the prior art, the utility model provides a kind of high-voltage generator turn-to-turn insulation protective device, can Generator turn-to-turn insulation is effectively protected not by the damage of high frequency voltage.

(2) technical solution

In order to achieve the above object, the utility model is achieved by the following technical programs:

A kind of high-voltage generator turn-to-turn insulation protective device, it is characterised in that: including there are three capacitor C1, C2, C3, often A capacitor C1, C2, C3 Z1, Z2, Z3 in parallel with an impedance of releasing are in parallel；Each capacitor C1, C2, C3 and release impedance Z 1, After Z2, Z3 are in parallel, one end is electrically connected with high frequency one end on-off system GD1, GD2, GD3 one-to-one correspondence, the other end is commonly connected to D Connecting terminal, D connecting terminal ground connection；The other end and A, B, C connecting terminal one of described each high frequency on-off system GD1, GD2, GD3 One is correspondingly connected with, and A, B, C connecting terminal and A, B, C three-phase electricity connect one to one.

A kind of high-voltage generator turn-to-turn insulation protective device, it is characterised in that: A, B, C connecting terminal is being sent out Motor outlet side connects one to one with A, B, C three-phase electricity.

The working principle of the utility model is:

When system generates high frequency voltage or high frequency overvoltage, high frequency on-off system GD1, GD2, GD3 conducting, high frequency on-off Device is a kind of circuit structure of frequency response, is not necessarily to external power supply, is the physical characteristic of circuit itself.When there is high frequency voltage When, circuit conducting be in short-circuit condition, when there is no high frequency voltage, circuit disconnect be in off state, capacitor C1, C2, C3 with System connection, absorbs energy, reduces electric voltage frequency, achievees the effect that protect generator turn-to-turn insulation, when high frequency voltage or high frequency After overvoltage disappears, high frequency on-off system GD1, GD2, GD3 shutdown, capacitor and system are disconnected, and do not influence system normal operation. It is parallel to impedance Z 1 of releasing, Z2, Z3 the releasing capacitor self-energy of capacitor C1, C2, C3, guarantees subsequent regular event.

(3) beneficial effect

The utility model have it is following the utility model has the advantages that

The utility model solves the damage of high frequency voltage or high frequency overvoltage to generator turn-to-turn insulation, while not increasing System capacitive current protects system and equipment safety operation.

Detailed description of the invention

Fig. 1 is the circuit diagram of the utility model.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work Every other embodiment obtained, fall within the protection scope of the utility model.

Referring to Fig. 1, a kind of high-voltage generator turn-to-turn insulation protective device, including there are three capacitor C1, C2, C3, often A capacitor C1, C2, C3 Z1, Z2, Z3 in parallel with an impedance of releasing are in parallel；Each capacitor C1, C2, C3 and release impedance Z 1, After Z2, Z3 are in parallel, one end is electrically connected with high frequency one end on-off system GD1, GD2, GD3 one-to-one correspondence, the other end is commonly connected to D Connecting terminal, D connecting terminal ground connection；The other end and A, B, C connecting terminal one of described each high frequency on-off system GD1, GD2, GD3 One is correspondingly connected with, and A, B, C connecting terminal connect one to one in generator outlet side and A, B, C three-phase electricity.

By taking 10.5kV generator as an example, specific implementation process is sketched,

Capacitor C1, C2, C3 select all types of capacitors of voltage rating 12kV or more, and range of capacity is 0.1-100 Microfarad, when having high frequency voltage and high frequency overvoltage, high frequency on-off system GD1, GD2, GD3 conducting, capacitor C1, C2, C3 are connect Enter in system, high frequency voltage and high frequency overvoltage, so that reducing frequency reduces amplitude, can reach protection circle to capacitor charging at this time Between the purpose that insulate, after high frequency on-off system GD1, GD2, GD3 shutdown, container C1, C2, C3 and system are disconnected, and are started to letting out Put impedance Z 1, Z2, Z3 release energy, the Standard resistance range 5-500M Ω for impedance of releasing guarantees subsequent regular event.

It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment Intrinsic element.

While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art, It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired Change, replacement and variant, the scope of the utility model is defined by the appended claims and the equivalents thereof.

Claims (2)

1. a kind of high-voltage generator turn-to-turn insulation protective device, it is characterised in that: including there are three capacitor C1, C2, C3, each Capacitor C1, C2, C3 Z1, Z2, Z3 in parallel with an impedance of releasing are in parallel；Each capacitor C1, C2, C3 and release impedance Z 1, Z2, After Z3 is in parallel, one end is electrically connected with high frequency one end on-off system GD1, GD2, GD3 one-to-one correspondence, the other end is commonly connected to D and connects Line terminals, D connecting terminal ground connection；The other end and A, B, C connecting terminal of described each high frequency on-off system GD1, GD2, GD3 are one by one It is correspondingly connected with, A, B, C connecting terminal and A, B, C three-phase electricity connect one to one.

2. a kind of high-voltage generator turn-to-turn insulation protective device according to claim 1, it is characterised in that: described A, B, C Connecting terminal connects one to one in generator outlet side and A, B, C three-phase electricity.