CN212462797U

CN212462797U - Static var generator

Info

Publication number: CN212462797U
Application number: CN202021135089.XU
Authority: CN
Inventors: 朱通; 郭道胜
Original assignee: Anhui New Online Science And Technology Share Co ltd
Current assignee: Anhui New Online Science And Technology Share Co ltd
Priority date: 2020-06-18
Filing date: 2020-06-18
Publication date: 2021-02-02
Anticipated expiration: 2030-06-18

Abstract

The utility model provides a static var generator, including the first cabinet body and the second cabinet body, wherein the internal transformer of installing of first cabinet installs contactor, reactor and power unit module in the second cabinet body, and wherein the inlet wire is connected to the transformer, and the contactor is connected with the transformer electricity, and the reactor is connected with the contactor electricity, and the power unit module is connected with the reactor electricity. The utility model has the advantages that: the equipment has the characteristics of few cascade modules, small fault probability, easy control of safe insulation handles, simple and convenient maintenance, modular installation structure, high ductility of function upgrading, capacity expansion flow, standardized quality and wide compatibility range of other subsystems of electric power.

Description

Static var generator

Technical Field

The utility model belongs to the electrical field especially relates to a static var generator.

Background

The static reactive generator is characterized in that a self-commutation bridge circuit is directly connected to a power grid in parallel through a reactor, the phase and amplitude of output voltage at the alternating current side of the bridge circuit are adjusted, or the current at the alternating current side of the bridge circuit is directly controlled, so that the circuit absorbs or emits reactive power meeting requirements, and the purpose of dynamic reactive compensation is achieved. A-SVG dynamic static var generator in the current market adopts a direct hanging type, and the structure of the generator comprises an incoming line high-voltage isolating switch, a connecting reactor, a starting cabinet, a control cabinet and a power cabinet. Wherein the power cabinet includes: each phase consists of 6 converter chain modules, A, B, C three phases total 18 power modules, and an ABC three-phase power module cabinet. The direct-hanging type composition has the defects of more cascade modules, higher fault probability, strict safety insulation requirement, and difficult later-stage capacity expansion due to the fact that the number of modules is large, special maintenance is needed, and the uncertain project capacity cannot be produced in a standardized manner.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a cascade module less static var generator is provided.

In order to realize the purpose, the utility model adopts the technical scheme that:

the utility model provides a static var generator, includes the first cabinet body and the second cabinet body, wherein the internal transformer of installing of first cabinet, installs contactor, reactor and power unit module in the second cabinet body, and wherein the inlet wire is connected to the transformer, and contactor is connected with the transformer electricity, and the reactor is connected with the contactor electricity, and the power unit module is connected with the reactor electricity.

Preferably, the power unit module further comprises a Hall sensor, and the Hall sensor is connected to a line between the reactor and the power unit module.

Preferably, the hall sensor is mounted on the second cabinet.

Preferably, the intelligent cabinet also comprises a soft start module, the soft start module is connected with the wire inlet end and the wire outlet end of the contactor in parallel, and the soft start module is installed on the second cabinet body.

Preferably, the device further comprises a circuit breaker, and the circuit breaker is connected to a line between the contactor and the transformer.

Preferably, the circuit breaker is mounted on the second cabinet.

Preferably, the first cabinet body and the second cabinet body are of an integrated structure and are separated into two chambers through the middle baffle, and the two chambers are respectively provided with the cabinet doors.

The utility model has the advantages that: the equipment has the characteristics of few cascade modules, small fault probability, easy control of safe insulation handles, simple and convenient maintenance, modular installation structure, high ductility of function upgrading, capacity expansion flow, standardized quality and wide compatibility range of other subsystems of electric power.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic diagram of the present invention.

Detailed Description

The present invention will be further described with reference to the following examples.

As shown in fig. 1 and 2, the static var generator adopts a transformer 1 to step down and then is connected with a circuit breaker 2, a contactor 3, a soft start module 4, a connecting reactor 5, a hall sensor 6 and a power unit module 7. The shortcoming that power unit need bear the high voltage in avoiding chain SVG guarantees the power supply security, and when the circuit realizes the function diversification, the high unity of assurance hardware module reduces the complexity of system architecture and is the prerequisite that promotes whole hardware platform reliability. In this embodiment, the transformer, the circuit breaker, the contactor, the soft start module, the reactor, and the hall sensor are all the prior art, and are not described in detail herein.

The incoming line step-down transformer 1 can reduce the influence and the disturbance to entire system when equipment goes wrong, has reduced the accident and has enlarged the probability, has the isolation effect, and voltage reduction safety insulation is easy to handle the accuse.

The breaker 2 is connected with the bus through breaking equipment of the breaker 2, the breaker 2 can close, bear and break the current under the normal loop condition and can close, bear and break the current under the abnormal loop condition within a specified time, and the breaker 2 has the protection functions and characteristics of overload, short circuit, under-voltage protection and the like, adjustable action value, automatic tripping, high breaking capacity, safe operation and the like.

The contactor 3 bears a large current, and the internal attracting coil controls the action of the contactor to realize the self-excitation starting of the static var generator.

The soft start module 4 is connected with the inlet end and the outlet end of the contactor 3 in parallel, assists the static var generator to start by self excitation, limits instantaneous closing impact current, reduces impact of the closing impact current on the contactor 3 and the power unit module 7, and plays a role in limiting current.

And the reactor 5 is connected to prevent equipment overcurrent and limit impact current, filter higher harmonics in a system and connect the power unit and a power grid together.

Hall sensor 6, when the electric current passes through Hall sensor 6, Hall sensor 6 can send voltage signal, realizes keeping apart with the major loop, and is less to signal transmission interference, and the fast precision of response speed is higher, the better detection control power unit module 7 output.

The power unit module 7 is used for outputting inductive reactive power and capacitive reactive power, dynamically sending power in real time according to requirements, each power unit is three-phase, reactive power can be compensated independently or simultaneously, the fault of a single module unit does not affect the normal operation of other units, and the fault unit can be replaced in an online electrified manner under the condition that other units normally operate.

The generator has only two cabinets in this embodiment, for first cabinet and second cabinet, wherein first cabinet is internal to be installed transformer 1, and other equipment are all installed in the second cabinet. The equipment has the characteristics of few cascade modules, small fault probability, easy control of safe insulation, simple and convenient maintenance, modular installation structure, high ductility of function upgrading, standardized quality better control of capacity expansion flow and wide compatibility range of other subsystems of electric power on the transformer 1 voltage reduction platform.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only illustrative of the principles of the present invention, and that simple modifications and substitutions by those skilled in the art are within the scope of the present invention without departing from the spirit and scope of the present invention.

Claims

1. A static var generator, characterized by: the intelligent cabinet comprises a first cabinet body and a second cabinet body, wherein a transformer is installed in the first cabinet body, a contactor, a reactor and a power unit module are installed in the second cabinet body, the transformer is connected with an incoming line, the contactor is electrically connected with the transformer, the reactor is electrically connected with the contactor, and the power unit module is electrically connected with the reactor.

2. A static var generator according to claim 1, wherein: the power unit module is characterized by further comprising a Hall sensor, wherein the Hall sensor is connected to a circuit of the reactor and the power unit module.

3. A static var generator according to claim 2, wherein: the Hall sensor is installed on the second cabinet body.

4. A static var generator according to claim 1, wherein: the soft start module is connected with the wire inlet end and the wire outlet end of the contactor in parallel and is arranged on the second cabinet body.

5. A static var generator according to claim 1 or 2 or 3 or 4, wherein: the circuit breaker is connected to a line between the contactor and the transformer.

6. A static var generator according to claim 5, wherein: the circuit breaker is installed on the second cabinet body.

7. A static var generator according to claim 1, wherein: the first cabinet body and the second cabinet body are of an integrated structure and are separated into two chambers through the middle baffle, and the two chambers are respectively provided with a cabinet door.