Transformation system for public protection device

Abstract

The invention provides a transformation system for a public protection device, and the system comprises a first connection unit, a second connection unit, a protection device, and an intermediate conversion device. The first connecting unit is used for connecting a new device in a to-be-transformed interval and the protection device; the second connection unit is used for connecting the protection device and the intermediate conversion device; the protection device is used for acquiring configuration parameters of a to-be-transformed interval through the first connection unit and generating corresponding mirror image information according to the configuration parameters; and the intermediate conversion device is used for receiving the mirror image information through the second connection unit and setting the public protection device connected with the intermediate conversion device according to the received mirror image information so as to realize transformation of the public protection device. In the transformation period, the old device can still operate continuously without quitting operation or changing the operation mode, site construction and subsequent expansion are facilitated, and power grid safety and continuous and reliable power supply of the transformer substation are ensured.

Description

Technical Field

[0001] The invention relates to the technical field of power system automation, and in particular to a transformation system for a public protection device. Background Art

[0002] The public protection devices of the substation are connected to almost all the lines and busbar sections of the entire station. In the over-service renovation project, this type of protection device must be shut down for renovation in each interval, and when the renovation of the first interval begins, the old device to be renovated must be synchronously shut down. During the period when all intervals are renovated and new devices are put into operation, the substation will lose this type of public protection, which will bring hidden dangers to the reliability and stability of the power grid operation. If a power grid failure occurs during the renovation, the substation will lose load due to the withdrawal of such devices from operation, and even cause the power grid to become unstable. Because of this problem, the renovation of the public protection device is difficult to advance. Therefore, it is urgent to study a device and a solution to resolve the power grid risks brought about by the renovation.

[0003] When replacing and renovating common protection devices such as standby automatic switching and bus differential protection in a substation, it is impossible to simultaneously connect the analog and switch quantities of one bay to the new and old common protection devices due to the limitation of the number of current transformer windings and auxiliary switch nodes in each bay.

[0004] Due to the above-mentioned limitations, the existing public protection transformation adopts the mode of migrating intervals one by one. The current, voltage and switch position of one interval are removed from the old device and installed in the new device. In this way, the entire station interval is migrated from the old device to the new device, thus completing the device replacement and transformation.

[0005] The necessary condition for the normal operation of the public protection device is that all the intervals that need to be connected to the device are connected. During the replacement and transformation process, both the new and old devices are in a non-fully connected state, so the new device cannot be put into operation and the old device must be shut down. At this time, the substation is in a state without public protection. Because the cycle of each interval's rotational power outage for migration cannot be guaranteed, power outages are often not approved during special periods such as power grid mode, power supply guarantee, and peak summer season, resulting in the entire transformation cycle being as short as a few months and as long as more than ten months. This poses a major safety hazard to the stable operation of the power grid. Summary of the invention

[0006] The purpose of the present invention is to provide a transformation system for a public protection device to solve the technical problem of how to ensure that the old device does not stop operating during the transformation interval.

[0007] In one aspect, a modification system for a public protection device is provided, comprising:

[0008] A first connecting unit, a second connecting unit, a protection device and an intermediate conversion device;

[0009] The first connection unit is used to connect the new device in the interval to be modified and the protection device;

[0010] The second connecting unit is used to connect the protection device and the intermediate conversion device;

[0011] The protection device is used to obtain the configuration parameters of the interval to be modified through the first connection unit, and generate corresponding mirror information according to the configuration parameters;

[0012] The intermediate conversion device is used to receive the mirror information through the second connection unit, and to set the public protection device connected thereto according to the received mirror information, so as to realize the transformation of the public protection device.

[0013] Preferably, the protection device is connected to a preset circuit of the interval to be modified through the first connection unit, and the preset circuit at least includes a current circuit, a voltage circuit, a switching value circuit and a tripping and closing circuit.

[0014] Preferably, the protection device is specifically used to generate corresponding analog quantities and switch quantities according to the acquired configuration parameters, and generate corresponding mirror information according to the analog quantities and switch quantities.

[0015] Preferably, the protection device is also used to cut off part of the circuits connected to it and retain only the tripping and closing circuits if it is identified that a power outage in the modified interval is required; wherein the part of the circuits connected to it at least include a current circuit, a voltage circuit, and a switching circuit.

[0016] Preferably, the protection device is also used to cut off the old device in the reconstruction interval and the corresponding tripping and closing circuit if it is identified that a new device in the reconstruction interval needs to be put into operation.

[0017] Preferably, the intermediate conversion device is specifically used to cut off the circuit connected to the new device if it is identified that a new device is put into operation within the interval that needs to be modified.

[0018] Preferably, the first connection unit is connected to the interval requiring transformation through a preset cable.

[0019] Preferably, the second connection unit connects the protection device and the intermediate conversion device through a preset optical soldering iron.

[0020] In summary, the implementation of the embodiments of the present invention has the following beneficial effects:

[0021] The transformation system for public protection devices provided by the present invention utilizes technologies such as real-time optical fiber communication and voltage and current amplifiers to realize multi-interval safety and protection. During the transformation period, the old device can continue to operate without having to shut down or change the operation mode, which facilitates on-site construction and subsequent expansion, and ensures the safety of the power grid and continuous and reliable power supply of the substation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, without paying creative labor, other drawings obtained based on these drawings still belong to the scope of the present invention.

[0023] Figure 1 It is a schematic diagram of a transformation system for a public protection device in an embodiment of the present invention. DETAILED DESCRIPTION

[0024] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the accompanying drawings.

[0025] like Figure 1 FIG. 1 is a schematic diagram of an embodiment of a transformation system for a public protection device provided by the present invention. In this embodiment, it includes:

[0026] A first connection unit, a second connection unit, a protection device and an intermediate conversion device; the first connection unit is used to connect the new device in the interval to be modified and the protection device; the second connection unit is used to connect the protection device and the intermediate conversion device; the protection device is used to obtain the configuration parameters of the interval to be modified through the first connection unit, and generate corresponding mirror information according to the configuration parameters; the intermediate conversion device is used to receive the mirror information from the second connection unit, and to set the public protection device connected to it according to the received mirror information, so as to realize the modification of the public protection device. It can be understood that the protection device extracts and mirrors the analog quantity and switch quantity and other information of the modified interval, and sends it to the intermediate conversion device through optical fiber communication. The intermediate conversion device converts the analog quantity and switch quantity and other mirror information, and migrates it to the old device through the cable.

[0027] In one embodiment, the protection device is connected to a preset circuit of the interval to be modified through the first connection unit, and the preset circuit includes at least a current circuit, a voltage circuit, a switch quantity circuit and a tripping circuit. The protection device is specifically used to generate corresponding analog quantities and switch quantities according to the acquired configuration parameters, and to generate corresponding mirror information according to the analog quantities and switch quantities. It is understandable that the protection device is connected to all circuits such as current, voltage, switch quantity, tripping circuit, etc. of the modified interval, obtains new configuration parameters and new device parameters of the modified interval in real time, and generates corresponding mirror images.

[0028] In one embodiment, the protection device is further used to cut off part of the circuits connected to it and retain only the tripping and closing circuits if it is identified that the interval needs to be remodeled and the power is cut off; wherein the part of the circuits connected to it at least include current circuits, voltage circuits, and switch quantity circuits. It is understandable that when the interval is remodeled and the power is cut off, the current, voltage, switch quantity and other circuits of the original device are removed, and only the tripping and closing circuits are retained.

[0029] In one embodiment, the protection device is also used to cut off the old device in the modified interval and the corresponding tripping and closing circuit if it is identified that a new device in the interval that needs to be modified is put into operation. The intermediate conversion device is specifically used to cut off the circuit connected to it if it is identified that a new device in the interval that needs to be modified is put into operation. It can be understood that an intermediate conversion device is installed on the original device panel and connected to the new safety or protection device through optical fiber communication; the intermediate conversion device connects the current, voltage, and switching quantity to the safety or protection original device through cables. When the power supply to the modified interval is restored, the remaining intervals are subjected to the same operation according to the above steps, so that the original device can continue to operate during the safety and protection transformation of multiple intervals without having to shut down or change the operation mode; after the new device is put into operation, the original device is shut down, the tripping and closing circuit of the original device is dismantled, and the intermediate conversion device is removed.

[0030] In one embodiment, the first connection unit connects the interval to be modified through a preset cable, and the second connection unit connects the protection device and the intermediate conversion device through a preset optical solder joint.

[0031] In summary, the implementation of the embodiments of the present invention has the following beneficial effects:

[0032] The transformation system for public protection devices provided by the present invention utilizes technologies such as real-time optical fiber communication and voltage and current amplifiers to realize multi-interval safety and protection. During the transformation period, the old device can continue to operate without having to shut down or change the operation mode, which facilitates on-site construction and subsequent expansion, and ensures the safety of the power grid and continuous and reliable power supply of the substation.

[0033] What is disclosed above is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope covered by the present invention.

Claims

1. A transformation system for a public protection device, characterized in that: include: A first connecting unit, a second connecting unit, a protection device and an intermediate conversion device; The first connection unit is used to connect the new device in the interval to be modified and the protection device; The second connecting unit is used to connect the protection device and the intermediate conversion device; The protection device is used to obtain the configuration parameters of the interval to be modified through the first connection unit, and generate corresponding mirror information according to the configuration parameters; The intermediate conversion device is used to receive the mirror information through the second connection unit, and to set the public protection device connected thereto according to the received mirror information, so as to realize the transformation of the public protection device.

2. The system according to claim 1, characterized in that The protection device is connected to a preset circuit of the interval to be modified through the first connection unit, and the preset circuit at least includes a current circuit, a voltage circuit, a switching value circuit and a tripping and closing circuit.

3. The system according to claim 2, characterized in that The protection device is specifically used to generate corresponding analog quantities and switch quantities according to the acquired configuration parameters, and to generate corresponding mirror information according to the analog quantities and switch quantities.

4. The system according to claim 2, characterized in that The protection device is also used to cut off part of the circuits connected to it and retain only the tripping and closing circuits if it is identified that a power outage in the interval needs to be modified; wherein the part of the circuits connected to it at least include a current circuit, a voltage circuit, and a switching circuit.

5. The system according to claim 4, characterized in that The protection device is also used to cut off the old device in the reconstruction interval and cut off the corresponding tripping and closing circuit if it is identified that a new device in the reconstruction interval needs to be put into operation.

6. The system according to claim 5, characterized in that The intermediate conversion device is specifically used to cut off the circuit connected to the new device if it is identified that a new device is put into operation within the interval that needs to be modified.

7. The system according to claim 1, characterized in that The first connection unit is connected to the interval requiring transformation through a preset cable.

8. The system of claim 1, wherein: The second connection unit connects the protection device and the intermediate conversion device through a preset optical solder joint.

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