Power supply system based on intelligent circuit breaker

Abstract

The utility model provides a power supply system based on an intelligent circuit breaker, which belongs to the field of power supply systems and comprises at least two power transmission lines and independent control cabinets arranged between the adjacent power transmission lines. Each power transmission line comprises a high-voltage overhead line, a drop fuse, a transformer, a line control cabinet and a low-voltage user line which are connected in sequence; the independent control cabinet is connected with the adjacent line control cabinet; the line control cabinet further comprises metering equipment, a fusion terminal and a line intelligent circuit breaker. The independent control cabinet further comprises an independent intelligent circuit breaker and an independent fusion terminal. Each of the line intelligent circuit breaker and the independent intelligent circuit breaker further comprises a circuit breaker module and an intelligent judgment module. According to the embodiment of the invention, when the load of resident electricity consumption changes drastically in different seasons, the power supply efficiency can be effectively improved, the line load, the line loss and the power supply cost are reduced, and meanwhile, the problem of long-time power failure of a line residential area after a single-transformer power supply system breaks down is solved.

Description

Technical Field

[0001] The present invention relates to the field of power supply systems, and in particular to a power supply system based on an intelligent circuit breaker. Background Art

[0002] Due to the different load levels of residents' electricity consumption in different seasons and with the vigorous promotion of the use of clean energy, the problem of load differences in different seasons will be further aggravated, which may lead to a series of problems such as overload of distribution lines, voltage drop, increased distribution network losses, and overload of distribution transformers.

[0003] refer to Figure 1 In part (a), when a single transformer power supply system fails, all users will lose power, causing a large-scale power outage and a long power outage. Maintenance and overhaul of a transformer power supply cannot achieve load transfer without power outage, resulting in load power outage and reduced user experience. Figure 1 (b) The drastic change in load leads to abnormal changes in transformer loss, making it difficult to effectively reduce line loss and power supply costs, reduce the load pressure on the power supply transformer, and ensure the safe and stable operation of the distribution network; when a certain area is overloaded in winter, a single transformer cannot share the load pressure; the area cannot be shut down in spring and autumn to reduce losses and improve transformer efficiency. When a certain section of the bus is disconnected due to extreme weather (floods, blizzards, etc.), it does not have the ability to provide emergency power supply. Summary of the invention

[0004] In order to overcome the shortcomings of the prior art, the purpose of the present invention is to provide a power supply system based on an intelligent circuit breaker to improve power supply efficiency, reduce line load, reduce line loss and reduce power supply costs, while solving the problem of long-term power outages in residential areas of the line after a single transformer power supply system fails.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] A power supply system based on an intelligent circuit breaker, comprising: at least two transmission lines and an independent control cabinet arranged between adjacent transmission lines; each transmission line comprises: a high-voltage overhead line, a drop fuse, a transformer, a line control cabinet and a low-voltage user line connected in sequence; the independent control cabinet is connected to the adjacent line control cabinet; the line control cabinet further comprises: a metering device connected to the low-voltage winding of the transformer, a line fusion terminal connected to the metering device, and a line intelligent circuit breaker connected to the line fusion terminal and the low-voltage user line; the independent control cabinet further comprises: an independent intelligent circuit breaker connected to the line intelligent circuit breaker on the adjacent transmission line and an independent fusion terminal connected to the independent intelligent circuit breaker; the line intelligent circuit breaker and the independent intelligent circuit breaker both comprise a circuit breaker module and an intelligent judgment module connected to the circuit breaker module;

[0007] The metering equipment is used to collect and send the electrical information of the transmission line where it is located to the preset cloud platform; the line fusion terminal is used to collect comprehensive electrical information and send the comprehensive electrical information to the intelligent judgment module of the line intelligent circuit breaker of the transmission line where it is located; the comprehensive electrical information includes the electrical information of the line where it is located, the electrical information of the adjacent transmission line and the electrical information of the independent control cabinet; the intelligent judgment module is used to receive the comprehensive electrical information and control the start and stop status of the circuit breaker module connected to the intelligent judgment module according to the comprehensive electrical information and the preset start and stop scheme; the independent fusion terminal is used to receive the electrical information of the adjacent transmission line, collect and send the electrical information of the independent control cabinet to the line fusion terminal of the adjacent transmission line, and send the comprehensive electrical information to the independent intelligent circuit breaker.

[0008] Preferably, the intelligent judgment module is used to receive the comprehensive electrical information and control the start and stop state of the circuit breaker module connected to the intelligent judgment module according to the comprehensive electrical information and a preset start and stop scheme, including:

[0009] A state matching submodule, used for acquiring the working state of the adjacent transmission line according to the comprehensive electrical information; the working state includes: power failure state, light load state and heavy load state;

[0010] A mode matching submodule, used for defining the working state of any of the adjacent transmission lines as a power failure state as an emergency mode, defining the working states of the adjacent transmission lines as all being light load states as an inefficient mode, and defining the working states of the adjacent transmission lines as both being light load states and heavy load states as an overload mode;

[0011] The scheme execution submodule is used to, in an emergency mode, open the circuit breaker module of the transmission line in a power-off state, and close the circuit breaker module of the independent intelligent circuit breaker; in an inefficient mode, open the circuit breaker module of any transmission line in a light-load state, and close the circuit breaker module of the independent intelligent circuit breaker; in an overload mode, close the circuit breaker module of the independent intelligent circuit breaker.

[0012] Preferably, both the fusion terminal and the independent fusion terminal are embedded with a communication device; the communication device is used to send and receive data with other communication devices.

[0013] Preferably, the line intelligent circuit breaker and the independent intelligent circuit breaker are both JP cabinet circuit breakers; the JP cabinet circuit breaker is used for power distribution, metering, protection, control and reactive power compensation of the transmission line.

[0014] Preferably, the electrical information includes current data and voltage data.

[0015] Preferably, the communication protocol adopted by the communication device is RS-485.

[0016] According to the specific embodiments provided by the present invention, the present invention discloses the following technical effects:

[0017] The utility model provides a power supply system based on intelligent circuit breakers, which belongs to the field of power supply systems, including: at least two transmission lines and an independent control cabinet arranged between adjacent transmission lines; each transmission line includes: a high-voltage overhead line, a drop fuse, a transformer, a line control cabinet and a low-voltage user line connected in sequence; the independent control cabinet is connected to the adjacent line control cabinet; the line control cabinet also includes: a metering device, a fusion terminal and a line intelligent circuit breaker; the independent control cabinet also includes: an independent intelligent circuit breaker and an independent fusion terminal; the line intelligent circuit breaker and the independent intelligent circuit breaker both include a circuit breaker module and an intelligent judgment module. This embodiment can effectively improve the power supply efficiency, reduce the line load, reduce the line loss and reduce the power supply cost when the load of residential electricity consumption changes drastically in different seasons, and at the same time solves the problem of long-term power outage in the residential area of ​​the line after a single transformer power supply system fails. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] 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 will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 A schematic diagram of an existing power supply system provided for an embodiment of the present invention; Figure 1 Part (a) is the schematic diagram of the old power supply system; Figure 1 Part (b) is the schematic diagram of the current power supply system;

[0020] Figure 2 A schematic diagram of a power supply system based on an intelligent circuit breaker provided in an embodiment of the present invention;

[0021] Description of reference numerals:

[0022] 1-line control cabinet, 2-independent control cabinet, 3-line fusion terminal, 4-independent fusion terminal, 5-metering equipment, 6-transformer, 7-drop insurance, 8-high-voltage overhead line, 9-low-voltage user line. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] The purpose of the present invention is to provide a power supply system based on an intelligent circuit breaker. This embodiment improves power supply efficiency, reduces line load, reduces line loss and reduces power supply costs, and at the same time solves the problem of long-term power outages in residential areas of the line after a single transformer power supply system fails.

[0025] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] Figure 2 The schematic diagram of the power supply system based on intelligent circuit breaker is as follows: Figure 2As shown, the present invention provides a power supply system based on an intelligent circuit breaker, comprising: at least two transmission lines and an independent control cabinet 2 arranged between adjacent transmission lines; each of the transmission lines comprises: a high-voltage overhead line 8, a drop fuse 7, a transformer 6, a line control cabinet 1 and a low-voltage user line 9 connected in sequence; the independent control cabinet 2 is connected to the adjacent line control cabinet 1; the line control cabinet 1 also comprises: a metering device 5 connected to the low-voltage winding of the transformer 6, a line fusion terminal 3 connected to the metering device 5, and a line intelligent circuit breaker connected to the line fusion terminal 3 and the low-voltage user line 9; the independent control cabinet 2 also comprises: an independent intelligent circuit breaker connected to the line intelligent circuit breaker on the adjacent transmission line and an independent fusion terminal connected to the independent intelligent circuit breaker; the line intelligent circuit breaker and the independent intelligent circuit breaker both comprise a circuit breaker module and an intelligent judgment module connected to the circuit breaker module;

[0027] The metering device 5 is used to collect and send the electrical information of the transmission line to the preset cloud platform; the line fusion terminal 3 is used to collect comprehensive electrical information and send the comprehensive electrical information to the intelligent judgment module of the line intelligent circuit breaker of the transmission line; the comprehensive electrical information includes the electrical information of the line, the electrical information of the adjacent transmission line and the electrical information of the independent control cabinet 2; the intelligent judgment module is used to receive the comprehensive electrical information and control the start and stop status of the circuit breaker module connected to the intelligent judgment module according to the comprehensive electrical information and the preset start and stop scheme; the independent fusion terminal is used to receive the electrical information of the adjacent transmission line, collect and send the electrical information of the independent control cabinet 2 to the line fusion terminal 3 of the adjacent transmission line, and send the comprehensive electrical information to the independent intelligent circuit breaker.

[0028] Further, the intelligent judgment module is used to receive the comprehensive electrical information and control the start and stop state of the circuit breaker module connected to the intelligent judgment module according to the comprehensive electrical information and a preset start and stop scheme, including:

[0029] A state matching submodule, used for acquiring the working state of the adjacent transmission line according to the comprehensive electrical information; the working state includes: power failure state, light load state and heavy load state;

[0030] A mode matching submodule, used for defining the working state of any of the adjacent transmission lines as a power failure state as an emergency mode, defining the working states of the adjacent transmission lines as all being light load states as an inefficient mode, and defining the working states of the adjacent transmission lines as both being light load states and heavy load states as an overload mode;

[0031] The scheme execution submodule is used to, in an emergency mode, open the circuit breaker module of the transmission line in a power-off state, and close the circuit breaker module of the independent intelligent circuit breaker; in an inefficient mode, open the circuit breaker module of any transmission line in a light-load state, and close the circuit breaker module of the independent intelligent circuit breaker; in an overload mode, close the circuit breaker module of the independent intelligent circuit breaker.

[0032] Specifically, both the fusion terminal and the independent fusion terminal are embedded with a communication device; the communication device is used to send and receive data with other communication devices.

[0033] Optionally, both the line intelligent circuit breaker and the independent intelligent circuit breaker are JP cabinet circuit breakers; the JP cabinet circuit breaker is used for power distribution, metering, protection, control and reactive power compensation of the transmission line.

[0034] Specifically, the electrical information includes current data and voltage data.

[0035] Optionally, the communication protocol adopted by the communication device is RS-485.

[0036] Specifically, the metering device 5 provides a billing basis for the power supply operator by collecting electrical information of each transmission line.

[0037] Reference Figure 1 This embodiment realizes the communication of electrical data of different lines by adding a fusion terminal, and realizes the connectivity of different transmission lines by using the introduced intelligent circuit breaker, thus avoiding large-scale and long-term power outages in the area caused by a single transmission line failure. At the same time, the circuit breaker is controlled by the preset electrical scheme of the intelligent circuit breaker, which improves the energy utilization efficiency, reduces the load pressure of a single line, and increases the overall stability of the power supply system.

[0038] Furthermore, based on the existing equipment, the private network of the IoT card operator is used to realize the mutual communication between multiple fusion terminals, and the data collected between the fusion terminals are interconnected;

[0039] Optionally, the algorithm logic of the smart substation is calculated and judged locally in the fusion terminal.

[0040] Specifically, when one side of the bus loses power, the fusion terminal on the power-lost side controls the incoming line switch of the area where it is located to open, and at the same time, through communication, the fusion terminal of the bus coupling cabinet is informed that the incoming line loses voltage, thereby starting the bus coupling automatic switching logic, realizing the function of standby automatic switching, making the two transformers 6 standby automatic switching, and realizing the function of one transformer 6 transferring power to two sections of load;

[0041] When the load of transformer 6 on one side is light, the fusion terminal in the contact box learns through communication that the load of one of the substations is within the light load range, and at the same time there is no heavy risk in the other substation, the fusion terminal in the contact box controls the contact switch to close, and the fusion terminal of the contact box on the light-load incoming line side controls the line switch to open after receiving the closing signal of the contact box to realize load transfer;

[0042] When the single-side transformer 6 is overloaded, the fusion terminal in the contact box learns through communication that the load condition of one of the substations is not at risk of overload, and the fusion terminal in the contact box controls the contact switch to close to realize load transfer.

[0043] The beneficial effects of the present invention are as follows:

[0044] This embodiment can effectively improve power supply efficiency, reduce line load, reduce line loss and reduce power supply costs when the residential electricity load changes dramatically in different seasons. At the same time, it solves the problem of long-term power outages in residential areas of the line after a single transformer power supply system fails.

[0045] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0046] The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A power supply system based on an intelligent circuit breaker, comprising: At least two power transmission lines and an independent control cabinet arranged between adjacent power transmission lines; Each of the transmission lines comprises: a high-voltage overhead line, a drop fuse, a transformer, a line control cabinet and a low-voltage user line connected in sequence; the independent control cabinet is connected to the adjacent line control cabinet, and is characterized in that the line control cabinet also comprises: a metering device connected to the low-voltage winding of the transformer, a line fusion terminal connected to the metering device, and a line intelligent circuit breaker connected to the line fusion terminal and the low-voltage user line; the independent control cabinet also comprises: an independent intelligent circuit breaker connected to the line intelligent circuit breaker on the adjacent transmission line and an independent fusion terminal connected to the independent intelligent circuit breaker; the line intelligent circuit breaker and the independent intelligent circuit breaker both comprise a circuit breaker module and an intelligent judgment module connected to the circuit breaker module; The metering equipment is used to collect and send the electrical information of the transmission line where it is located to the preset cloud platform; the line fusion terminal is used to collect comprehensive electrical information and send the comprehensive electrical information to the intelligent judgment module of the line intelligent circuit breaker of the transmission line where it is located; the comprehensive electrical information includes the electrical information of the line where it is located, the electrical information of the adjacent transmission line and the electrical information of the independent control cabinet; the intelligent judgment module is used to receive the comprehensive electrical information and control the start and stop status of the circuit breaker module connected to the intelligent judgment module according to the comprehensive electrical information and the preset start and stop scheme; the independent fusion terminal is used to receive the electrical information of the adjacent transmission line, collect and send the electrical information of the independent control cabinet to the line fusion terminal of the adjacent transmission line, and send the comprehensive electrical information to the independent intelligent circuit breaker.

2. A power supply system based on an intelligent circuit breaker according to claim 1, characterized in that: The intelligent judgment module is used to receive the comprehensive electrical information and control the start and stop state of the circuit breaker module connected to the intelligent judgment module according to the comprehensive electrical information and a preset start and stop scheme, including: A state matching submodule, used for acquiring the working state of the adjacent transmission line according to the comprehensive electrical information; the working state includes: power failure state, light load state and heavy load state; A mode matching submodule, used for defining the working state of any of the adjacent transmission lines as a power failure state as an emergency mode, defining the working states of the adjacent transmission lines as all being light load states as an inefficient mode, and defining the working states of the adjacent transmission lines as both being light load states and heavy load states as an overload mode; The scheme execution submodule is used to, in an emergency mode, open the circuit breaker module of the transmission line in a power-off state, and close the circuit breaker module of the independent intelligent circuit breaker; in an inefficient mode, open the circuit breaker module of any transmission line in a light-load state, and close the circuit breaker module of the independent intelligent circuit breaker; in an overload mode, close the circuit breaker module of the independent intelligent circuit breaker.

3. A power supply system based on an intelligent circuit breaker according to claim 1, characterized in that: The fusion terminal and the independent fusion terminal are both embedded with a communication device; the communication device is used to send and receive data with other communication devices.

4. A power supply system based on an intelligent circuit breaker according to claim 1, characterized in that: The line intelligent circuit breaker and the independent intelligent circuit breaker are both JP cabinet circuit breakers; the JP cabinet circuit breaker is used for electric energy distribution, metering, protection, control and reactive power compensation of the transmission line.

5. The power supply system based on intelligent circuit breaker according to claim 1, characterized in that: The electrical information includes current data and voltage data.

6. A power supply system based on an intelligent circuit breaker according to claim 3, characterized in that: The communication protocol adopted by the communication device is RS-485.

Images