CN103887050A - Mutual inductor device in intelligent substation - Google Patents

Abstract

The invention provides a mutual inductor device in an intelligent substation, which comprises: the system comprises a low-power iron core coil, a primary converter, a capacitive voltage divider, a composite insulator, an optical fiber, an insulated optical interface module, an optical cable, a driving module and a merging unit; the low-power iron core coil and the primary converter are arranged at the high-voltage end of the mutual inductor device; the merging unit is connected with secondary equipment of the transformer substation; the merging unit is used for receiving the multi-path sampling signals transmitted by the primary converter, merging and synchronizing the multi-path sampling signals and generating multi-path output. The mutual inductor device in the intelligent substation is simple and reliable, small in size, light in weight, large in dynamic response range, free of magnetic saturation, free of PT resonance phenomenon and irrelevant to load in precision.

Description

Transformer device in a smart substation

technical field

The invention relates to smart grid technology, in particular to the technology of transformers in smart substations, in particular to a transformer device in smart substations.

Background technique

The traditional electromagnetic transformer is based on the principle of electromagnetic induction, mainly composed of iron core and coil. This kind of transformer has saturation problem and the frequency band is not wide. Generate magnetic resonance, and can not open, only analog output.

Contents of the invention

The present invention provides a transformer device in an intelligent substation to solve the problems of existing transformers that are not wide in frequency band, difficult to insulate, high in cost, magnetically saturated, and prone to magnetic resonance as the voltage level increases. .

In order to achieve the above object, the present invention provides a transformer device in an intelligent substation, said transformer device comprising: a low-power iron core coil, a primary converter, a capacitive voltage divider, an insulating optical interface module, a drive module and a combined unit; the low-power iron core coil and the primary converter are arranged at the high-voltage end of the transformer device; the capacitive voltage divider includes: a composite insulator and an optical fiber, and the optical fiber is embedded in the load insulator ;

The primary converter is connected to the insulating optical interface module through the optical fiber, the insulating optical interface module is connected to the driving module through an optical cable, and the driving module is connected to the merging unit; The merging unit is used to provide laser energy for the primary converter, and output the multiple sampling signals to the secondary equipment of the substation connected to it after merging and synchronous processing.

In one embodiment, the drive module includes: a PIN interface module, a data processing module, a drive circuit and a laser, the PIN interface module receives the multi-channel sampling signal, and sends the multi-channel sampling signal to the data processing module; the data processing module processes the multi-channel sampling signal and sends it to the merging unit and the driving circuit, and the driving circuit according to the processed multi-channel sampling signal The signal controls the laser to perform feedback output to the insulating optical interface module.

In one embodiment, the merging unit includes: a line protection output port, a busbar protection output port, a transformer protection output port, a wave recording output port, a measurement and control output port, and a metering output port. The merging unit is used for receiving multiple sampling signals transmitted by the primary converter, and combining and synchronizing the multiple sampling signals to generate multiple outputs.

The beneficial effect of the embodiment of the present invention is that the transformer device in the intelligent substation of the present invention is simple and reliable, small in size, light in weight, large in dynamic response range, free of magnetic saturation, PT free of resonance, and its accuracy is independent of load. It solves the problems of the existing transformers such as not having a wide frequency band, difficulty in insulation, high cost, magnetic saturation, and easy occurrence of magnetic resonance as the voltage level increases.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained according to these drawings without any creative effort.

FIG. 1 is a structural block diagram of a transformer device 100 in a smart substation according to an embodiment of the present invention;

2 is a schematic structural diagram of a transformer device in a smart substation according to an embodiment of the present invention;

Fig. 3 is the structural block diagram of the drive module of the embodiment of the present invention;

FIG. 4 is a schematic diagram of ports of a merging unit according to an embodiment of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

As shown in Figure 1, an embodiment of the present invention provides a transformer device 100 in a smart substation, the transformer device 100 includes: a low-power iron core coil 101, a primary converter 102, a capacitive voltage divider 103, and an insulating optical interface module 104 , optical cable 105 , drive module 106 and merging unit 107 .

As shown in FIG. 2 , the capacitive voltage divider includes: a composite insulator 108 and an optical fiber 109 , and the optical fiber 109 is embedded in the composite insulator 108 .

The low-power iron core coil 101 samples the sampling object, the sampling signal is converted into an optical fiber signal through the primary converter 102, and transmitted to the insulating optical interface module 104 through the optical fiber 109, and the output signal of the insulating optical interface module 104 is sent to the drive module through the optical cable 105 106 , and at the same time receive the optical output of the driving module 106 through the optical cable 105 , and the data processing result of the driving module 106 is sent to the merging unit 107 .

The primary converter 102 is also called a remote module. As shown in FIG. 2 , the low-power core coil 101 and the primary converter 102 are both installed at the high voltage end of the transformer device 100 , and the merging unit 107 is connected to the secondary equipment 200 of the substation.

As shown in FIG. 3 , the driving module 106 further includes: a PIN interface module 301 , a data processing module 302 , a driving circuit 303 and a laser 304 . The PIN interface module 301 receives multiple sampling signals and sends the multiple sampling signals to the data processing module 302 ; the data processing module 302 processes the multiple sampling signals and sends them to the combining unit 107 and the driving circuit 303 . The driving circuit 303 controls the laser 304 to perform feedback output to the isolated optical interface module 104 according to the processed multi-channel sampling signal.

The merging unit 107 is used to provide the primary converter 102 with laser light. The merging unit 107 can also be used to receive the multiple sampling signals processed by the data processing module 302 (that is, the multiple sampling signals transmitted by the primary converter 102 and processed by the data processing module 302) and combine the multiple sampling signals and synchronous processing to generate multiple outputs.

The problem of data synchronization means that the sampling data required by the secondary equipment of the substation is collected at the same time point, that is, the time synchronization of the sampling data is to avoid phase and amplitude errors. Accurate time synchronization is very important in power systems, and it is widely used in many aspects such as relay protection, fault location, fault analysis, automatic control, and energy acquisition. For example, for metering, the time synchronization accuracy is required to be controlled within 1us, and for general transmission line protection, the time synchronization accuracy should be within 4us. There are two methods to solve the time synchronization problem: interpolation calculation and synchronization using a common clock pulse. The interpolation calculation is completed by the secondary equipment. According to the sampling values at several time points provided by the transformer, the interpolation calculation obtains the voltage and current values at the required time points. Using the common clock pulse synchronization method, the receiving module in the transformer receives the precise second clock pulse shared by the whole station, so as to synchronize its own internal clock with the common clock. Finally, according to the multiplied signal of the common clock, a synchronization command is sent to the connected transformers.

The present invention generally uses an interpolation calculation method to realize data synchronization, and the merging unit uses an interpolation algorithm to realize synchronization, and the hardware is simple and reliable.

As shown in Figure 4, the merging unit 107 includes: a line protection output port 401, a busbar protection output port 402, a transformer protection output port 403, a wave recording output port 404, a measurement and control output port 405 and a metering output port 406, all connected to the second substation Secondary device 200.

Those skilled in the art should understand that the embodiments of the present invention may be provided as methods, systems, or computer program products. Accordingly, the present invention can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It should be understood that each procedure and/or block in the flowchart and/or block diagram, and a combination of procedures and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions may be provided to a general purpose computer, special purpose computer, embedded processor, or processor of other programmable data processing equipment to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing equipment produce a An apparatus for realizing the functions specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to operate in a specific manner, such that the instructions stored in the computer-readable memory produce an article of manufacture comprising instruction means, the instructions The device realizes the function specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions can also be loaded onto a computer or other programmable data processing device, causing a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process, thereby The instructions provide steps for implementing the functions specified in the flow chart or blocks of the flowchart and/or the block or blocks of the block diagrams.

In the present invention, specific examples have been applied to explain the principles and implementation methods of the present invention, and the descriptions of the above examples are only used to help understand the method of the present invention and its core idea; meanwhile, for those of ordinary skill in the art, according to this The idea of the invention will have changes in the specific implementation and scope of application. To sum up, the contents of this specification should not be construed as limiting the present invention.

Claims (3)

1. the transformer device in intelligent substation, is characterized in that, described transformer device comprises: low-power iron-core coil, primary transducer, capacitor voltage divider, insulation optical interface module, driver module and merge cells; Described low-power iron-core coil and primary transducer are arranged at the high-pressure side of described transformer device; Described capacitor voltage divider comprises: composite insulator and optical fiber, and described optical fiber is embedded in described load insulator;

Described primary transducer connects described insulation optical interface module by described optical fiber, and described insulation optical interface module is connected with described driver module by optical cable, and described driver module is connected with described merge cells; Described merge cells is used to described primary transducer that energy supply laser is provided, and multi-channel sampling signal is merged and synchronously after processing, export to connected substation secondary device.

2. the transformer device in intelligent substation as claimed in claim 1, it is characterized in that, described driver module comprises: PIN interface module, data processing module, drive circuit and laser, described PIN interface module receives described multi-channel sampling signal, and described multi-channel sampling signal is sent to described data processing module; Described data processing module sends to described merge cells and drive circuit after described multi-channel sampling signal is processed, described drive circuit feeds back output according to the laser described in described multi-channel sampling signal controlling after treatment to described insulation optical interface module.

3. the transformer device in intelligent substation as claimed in claim 1, is characterized in that, described merge cells comprises: route protection output port; bus protection output port; tranformer protection output port, record wave output terminal mouth, observing and controlling output port and metering output port.The multi-channel sampling signal that described merge cells transmits for receiving described primary transducer, and described multi-channel sampling signal is merged and synchronously processed, multichannel output generated.

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