Centralized control protection system and electronic equipment

Abstract

The utility model relates to the field of circuit safety, in particular to a centralized control protection system and electronic equipment. The centralized control protection system comprises a protection module which comprises a plurality of circuit breakers; a centralized control module which is connected with the protection module and is used for collecting the current of the output ends of the plurality of circuit breakers and controlling the circuit breakers to be disconnected; and the monitoring module is in communication connection with the protection centralized control module and is used for receiving the current signals of the plurality of circuit breakers sent by the centralized control module and sending a control instruction for controlling the circuit breakers to be disconnected according to the current signals.

Description

Technical Field

[0001] The present disclosure relates to the field of circuit safety, and in particular to a centralized control protection system and electronic equipment. Background Art

[0002] Circuit breakers are an important protective device in power systems, used to protect wires, cables and electrical equipment from short circuits and overloads. They are widely used in power transmission and transformation, generators, substations and other fields. At present, in power systems, in order to achieve complex circuit breaker protection functions, it is generally necessary to use intelligent circuit breakers with intelligent control components for protection. In power systems with more circuits, the demand for circuit breakers is large, and compared with ordinary circuit breakers, the cost of intelligent circuit breakers is much higher, which makes the overall cost of the system higher. Utility Model Content

[0003] The embodiments of the present disclosure provide a centralized control protection system and electronic equipment, which can reduce the overall cost of the system.

[0004] In a first aspect, an embodiment of the present application provides a centralized control protection system, including a protection module, wherein the protection module includes a plurality of circuit breakers;

[0005] A centralized control module, connected to the protection module, for collecting currents at the output ends of the plurality of circuit breakers and controlling the circuit breakers to disconnect;

[0006] The monitoring module is connected to the protection centralized control module for receiving current signals of the multiple circuit breakers sent by the centralized control module and sending control instructions for controlling the circuit breakers to disconnect according to the current signals.

[0007] In a second aspect, an embodiment of the present application provides an electronic device, comprising a centralized control and protection system as described in any one of the first aspects.

[0008] One beneficial effect of the disclosed embodiment is that the system includes a plurality of circuit breaker protection modules connected to a centralized control, the centralized control module can collect currents at the output terminals of the plurality of circuit breakers and control the circuit breakers to disconnect, and at the same time, the monitoring module is in communication connection with the centralized control module and can send control instructions for controlling the circuit breakers to disconnect according to the current signals of the plurality of circuit breakers sent by the centralized control module, so that the centralized control protection module controls the circuit breakers to disconnect. Through the above system, when protecting the circuit, there is no requirement for the circuit breakers in the circuit, and ordinary circuit breakers can be used to protect the circuit, and specific protection strategies and algorithms can be monitored and calculated by the centralized control module or the monitoring module, so as to reduce the overall cost of the system.

[0009] Other features and advantages of the embodiments of the present disclosure will become apparent from the following detailed description of exemplary embodiments of the present disclosure with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the description, serve to explain the principles of the embodiments of the present disclosure.

[0011] Figure 1 A structural block diagram of a centralized control and protection system according to an embodiment of the present disclosure is shown.

[0012] Figure 2 A schematic diagram showing an example of a centralized control protection system according to an embodiment of the present disclosure.

[0013] Figure 3 A schematic diagram showing another example of a centralized control protection system according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0014] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0015] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

[0016] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0017] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0018] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0019] like Figure 1As shown, an embodiment of the present application introduces a centralized control protection system, a protection module, the protection module includes multiple circuit breakers; a centralized control module, connected to the protection module, for collecting currents at the output ends of the multiple circuit breakers, and controlling the circuit breakers to disconnect; a monitoring module, communicatively connected to the protection centralized control module, for receiving current signals of the multiple circuit breakers sent by the centralized control module, and sending control instructions for controlling the circuit breakers to disconnect according to the current signals.

[0020] In the embodiment of the present application, the protection module includes a plurality of circuit breakers, and the plurality of circuit breakers can be respectively set in different circuits to provide protection for the different circuits. For example, the plurality of circuit breakers can be respectively set in different circuits of the power distribution cabinet.

[0021] In an example of this embodiment, the centralized control module includes at least one centralized control device, the centralized control device is connected to a plurality of circuit breakers, and the centralized control device is communicatively connected to the monitoring module.

[0022] In this embodiment, the centralized control module may include one or more centralized control devices, each of which may be connected to multiple circuit breakers. The centralized control device may control the corresponding circuit breaker to disconnect based on the connection, and collect the current at the output end of the corresponding circuit breaker. In this embodiment, each centralized control device is also respectively connected to the monitoring module in communication, and the communication connection is based on the 485 protocol or other communication protocols.

[0023] In this embodiment, the monitoring module can be provided with a monitoring system, which detects data such as the output current and input voltage of the circuit breaker through the monitoring system. In addition, the monitoring module can determine whether the corresponding circuit breaker needs to be disconnected through preset judgment conditions. When the circuit breaker needs to be disconnected, the monitoring module sends a control command to the centralized control device of the centralized control module to control the corresponding circuit breaker to disconnect.

[0024] In an example of this embodiment, the centralized control device collects the three-phase currents and zero-sequence currents of the output ends of the multiple circuit breakers through current transformers.

[0025] In an example of this embodiment, the A phase, B phase, C phase and neutral line of each circuit breaker output end are respectively connected to the first end of a current transformer; the centralized control device includes multiple current collection ports, and the multiple current collection ports are respectively connected to the second ends of multiple current transformers.

[0026] like Figure 2 As shown, Figure 2The figure is a schematic diagram of the connection between a centralized control device PCP and a common circuit breaker QF, wherein the output end of each circuit breaker is connected to one end of a current transformer, and the current acquisition port of the centralized control device can be connected to the other end of a current transformer. Figure 2 As shown, the I1A port of the centralized control device PCP is connected to the current transformer CT1, and one end of CT1 corresponds to the A phase line connected to the output end of the circuit breaker QF. The I1B port of the centralized control device PCP is connected to the current transformer CT2, and one end of CT2 corresponds to the B phase line connected to the output end of the circuit breaker QF. The I1C port of the centralized control device PCP is connected to the current transformer CT3, and one end of CT3 corresponds to the C phase line connected to the output end of the circuit breaker QF. The I1N port of the centralized control device PCP is connected to the current transformer CT4, and one end of CT4 corresponds to the neutral line N connected to the output end of the circuit breaker QF. Based on the above connection method, the centralized control device can collect the three-phase current and zero-sequence current of the output end of the circuit breaker.

[0027] In this embodiment, the centralized control device includes a ground terminal and multiple control ports, the tripping coil of each circuit breaker is connected to the ground terminal and one of the multiple control ports, and the centralized control device controls the circuit breaker to disconnect through the control port.

[0028] like Figure 2 As shown, the centralized control device may include a ground terminal COM and multiple control ports. In one example, the trip coil YO of the circuit breaker QF may be connected to the ground terminal and a control port respectively. In this example, the trip coil may be connected to the control port D01 and the ground terminal COM, and the centralized control device PCP may supply power to the trip coil YO of the circuit breaker QF based on the control port D01. Different power supply voltages may also be pre-configured for adaptation to circuit breakers of different specifications.

[0029] In this embodiment, the centralized control device includes a plurality of voltage acquisition ports, and the plurality of current acquisition ports are respectively connected to the A phase, B phase, C phase and neutral line of the input ends of the plurality of circuit breakers.

[0030] In this example, the voltage acquisition port of the centralized control device can be connected to the circuit breaker input terminal. Figure 2 As shown, the UA port of the centralized control device PCP is connected to the A phase line of the circuit breaker QF input terminal, the UB port of the centralized control device PCP is connected to the B phase line of the circuit breaker QF input terminal, and the UC port of the centralized control device PCP is connected to the C phase line of the circuit breaker QF input terminal. The UN port of the centralized control device PCP is connected to the neutral line N of the circuit breaker QF input terminal. In this example, the centralized control device can collect the input voltage of the circuit breaker and send it to the monitoring module through communication, so that the monitoring module can comprehensively determine whether the circuit breaker needs to be disconnected.

[0031] In this example, in a scenario where multiple circuit breakers use the same input terminal, such as a distribution cabinet scenario, the centralized control device can only collect the AC voltage, that is, the voltage at the input terminal, as the input voltage of multiple circuit breakers.

[0032] In another embodiment of this embodiment, the centralized control module further includes a centralized control device and multiple IO devices, the multiple IO devices are connected to the multiple circuit breakers in a one-to-one correspondence, and the centralized control device is communicatively connected to the monitoring module and the multiple IO devices.

[0033] In this example, each circuit breaker may correspond to an IO device, and the IO device may collect the output current and input voltage of the circuit breaker or control the circuit breaker to disconnect through the IO interface. In this embodiment, multiple IO devices may be connected to the centralized control device in communication, and send the current and voltage information of the circuit breaker to the centralized control device based on the communication connection, or receive the control instruction sent by the centralized control device based on the communication connection to disconnect the corresponding circuit breaker.

[0034] In an example of the present embodiment, the A phase, B phase, C phase and neutral line of each circuit breaker output end are respectively connected to the first end of a current transformer; the IO device includes four current acquisition ports, and the four current acquisition ports are respectively connected to the second ends of the first current transformer, the second current transformer, the third current transformer and the fourth current transformer; wherein the first current transformer is a current transformer connected to the A phase output end of the circuit breaker corresponding to the IO device, the second current transformer is a current transformer connected to the B phase output end of the circuit breaker corresponding to the IO device, the third current transformer is a current transformer connected to the C phase output end of the circuit breaker corresponding to the IO device, and the fourth current transformer is a current transformer connected to the neutral line of the circuit breaker output end corresponding to the IO device.

[0035] like Figure 3 As shown, Figure 3 The figure is a schematic diagram of the connection of a centralized control device PCP, an IO device and a common circuit breaker QF, wherein the output end of each circuit breaker is connected to one end of a current transformer, and the current acquisition port of the IO device can be connected to the other end of a current transformer. Figure 3As shown, the I1 port of the IO device is connected to the first current transformer CT1, and one end of the first current transformer CT1 corresponds to the A phase line of the output end of the circuit breaker QF. The I2 port of the IO device is connected to the second current transformer CT2, and one end of the second current transformer CT2 corresponds to the B phase line of the output end of the circuit breaker QF. The I3 port of the IO device is connected to the third current transformer CT3, and one end of the third current transformer CT3 corresponds to the C phase line of the output end of the circuit breaker QF. The I4 port of the IO device is connected to the fourth current transformer CT4, and one end of the fourth current transformer CT4 corresponds to the neutral line of the output end of the circuit breaker QF. Based on the above connection method, the IO device can collect the three-phase current and zero-sequence current of the output end of the circuit breaker, and send them to the centralized control device PCP through the communication connection.

[0036] In an example of this embodiment, the IO device includes multiple voltage acquisition ports, and the multiple voltage acquisition ports are respectively connected to the A phase, B phase, C phase and neutral line of the input end of the circuit breaker corresponding to the IO device.

[0037] For example, Figure 3 As shown, the U1 port of the IO device is connected to the A phase line of the QF input terminal of the circuit breaker, the U2 port of the IO device is connected to the B phase line of the QF input terminal of the circuit breaker, and the U3 port of the IO device is connected to the C phase line of the QF input terminal of the circuit breaker. The U4 port of the IO device is connected to the neutral line N of the QF input terminal of the circuit breaker. In this example, the IO device can collect the input voltage of the circuit breaker and send it to the centralized control device through communication. The centralized control device can upload the monitoring module so that the monitoring module can comprehensively determine whether the circuit breaker needs to be disconnected.

[0038] In this embodiment, the IO device includes: a ground terminal and a control port, a trip coil of a circuit breaker corresponding to the IO device is connected to the ground terminal and the control port, and the IO device controls the circuit breaker to disconnect through the control port.

[0039] like Figure 3 As shown, the IO device may include a ground terminal C2 and a control port C1. In one example, the trip coil YO of the circuit breaker QF may be connected to the ground terminal C2 and the control port C1 respectively, and the IO device may supply power to the trip coil YO of the circuit breaker QF based on the control port C1. Different power supply voltages may also be pre-configured for adaptation to circuit breakers of different specifications.

[0040] In one example of this embodiment, the centralized control device is powered by a DC backup power supply and an AC power supply. During the early stage of system debugging, the AC power supply may be disconnected. At this time, in order to ensure the power supply of the centralized control device, the backup DC power supply may be used to power it.

[0041] In an example of this embodiment, the centralized control device is provided with a USB communication interface, and the USB interface is used to write at least one of the overload long delay protection, overload short delay protection, overload instantaneous protection and grounding protection programs.

[0042] In this example, the centralized control device may be provided with a USB interface, and the interface may be pre-written with programs of various protection strategies, addresses of various ports or IO modules, and other information.

[0043] At present, the four-stage protection function of overload long delay protection, overload short delay protection, overload instantaneous protection and grounding protection can usually only be realized through intelligent circuit breakers. Through the above method, the four-stage protection function can be realized when using ordinary circuit breakers.

[0044] In an example of this embodiment, the system is used to implement at least one of the following working modes under the control of the centralized control module: an overload long delay protection mode, corresponding to the overload long delay protection mode, collecting currents at the output ends of multiple circuit breakers, and disconnecting the first circuit breaker when the current at the output end of the first circuit breaker is within a first preset current interval for more than a first time; an overload short delay protection mode, corresponding to the overload short delay protection mode, collecting currents at the output ends of multiple circuit breakers, and disconnecting the first circuit breaker when the current at the output end of the first circuit breaker is within a second preset current interval for more than a second time, wherein, The minimum current value of the second preset current interval is greater than the maximum current value of the first preset current interval, and the second time is less than the first time; the overload instantaneous protection mode, corresponding to the overload loss protection mode, collects the currents at the output ends of multiple circuit breakers, and disconnects the first circuit breaker when the current at the output end of the first circuit breaker is within the third preset current interval, wherein the minimum current value of the third preset current interval is greater than the maximum current value of the second preset current interval; the grounding protection mode, corresponding to the grounding protection mode, collects the currents at the output ends of multiple circuit breakers, and disconnects the first circuit breaker when a zero-sequence current appears at the output end of the first circuit breaker.

[0045] In this example, when the protection program of the four-stage protection function is written in the centralized control module, the system can implement one or more of the following working modes. The centralized control module can collect the three-phase current of the circuit breaker or the current of the neutral line, and determine the execution of the corresponding protection mode according to the current interval in which the current is located. For example, when the current is in a relatively low first interval, the system can be in an overload long delay protection mode, and the circuit breaker will be controlled to disconnect only when the time in the first interval is greater than a certain time. For another example, when the current is in a second interval with a larger current value than the first interval, the system can be in an overload short delay protection mode, and the circuit breaker is controlled to disconnect when the current is in the second interval for more than a certain time, wherein the setting event of the overload short delay mode should be less than the long delay time. In another example, when the current of the circuit breaker is in a higher preset interval, the circuit breaker can be controlled to disconnect immediately to ensure the circuit safety of the system. In one example, when a zero-sequence current appears at the neutral line output end of the circuit breaker, the centralized control device can also control the circuit breaker to disconnect immediately to ensure the circuit safety of the system.

[0046] In this example, the centralized control device may be pre-written with a corresponding control program so that it can execute the corresponding circuit protection mode based on the collected current data and control the circuit breaker to disconnect.

[0047] In an example of this embodiment, an electronic device is also introduced, including the centralized control protection system of any of the above embodiments, and can achieve the same technical effect, so it will not be described here to avoid repetition.

[0048] Each embodiment in the present disclosure is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the device and equipment embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiments.

[0049] The above embodiments mainly focus on describing the differences from other embodiments, but it should be clear to those skilled in the art that the above embodiments can be used alone or in combination with each other as needed.

[0050] The embodiments of the present disclosure have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A centralized control and protection system, characterized in that: include: A protection module, wherein the protection module includes a plurality of circuit breakers; A centralized control module, connected to the protection module, for collecting currents at the output ends of the plurality of circuit breakers and controlling the circuit breakers to disconnect; The monitoring module is connected to the centralized control module for receiving current signals of the multiple circuit breakers sent by the centralized control module, and sending control instructions for controlling the circuit breakers to disconnect according to the current signals.

2. The system according to claim 1, characterized in that The centralized control module includes at least one centralized control device, the centralized control device is connected to a plurality of circuit breakers, and the centralized control device is in communication connection with the monitoring module.

3. The system according to claim 2, characterized in that The centralized control device collects three-phase currents and zero-sequence currents at output ends of the multiple circuit breakers through current transformers.

4. The system according to claim 3, characterized in that The A phase, B phase, C phase and neutral line of each circuit breaker output terminal are respectively connected to the first end of a current transformer; The centralized control device comprises a plurality of current collection ports, and the plurality of current collection ports are respectively connected to the second ends of the plurality of current transformers.

5. The system according to claim 2, characterized in that The centralized control device comprises a ground terminal and a plurality of control ports, the tripping coil of each circuit breaker is connected to the ground terminal and one of the plurality of control ports, and the centralized control device controls the circuit breaker to be disconnected through the control port.

6. The system according to claim 2, characterized in that The centralized control device comprises a plurality of voltage acquisition ports, and the plurality of current acquisition ports are respectively connected to the A phase, B phase, C phase and neutral line of the input ends of the plurality of circuit breakers.

7. The system according to claim 1, characterized in that The centralized control module further includes a centralized control device and a plurality of IO devices. The plurality of IO devices are connected to the plurality of circuit breakers in a one-to-one correspondence. The centralized control device is communicatively connected to the monitoring module and the plurality of IO devices.

8. The system according to claim 7, characterized in that The A phase, B phase, C phase and neutral line of each circuit breaker output terminal are respectively connected to the first end of a current transformer; The IO device includes four current collection ports, and the four current collection ports are respectively connected to the second ends of the first current transformer, the second current transformer, the third current transformer and the fourth current transformer; Among them, the first current transformer is a current transformer connected to the A-phase output terminal of the circuit breaker corresponding to the IO device, the second current transformer is a current transformer connected to the B-phase output terminal of the circuit breaker corresponding to the IO device, the third current transformer is a current transformer connected to the C-phase output terminal of the circuit breaker corresponding to the IO device, and the fourth current transformer is a current transformer connected to the neutral line of the output terminal of the circuit breaker corresponding to the IO device.

9. The system according to claim 7, characterized in that The IO device comprises a plurality of voltage acquisition ports, and the plurality of voltage acquisition ports are respectively connected to the A phase, the B phase, the C phase and the neutral line of the input end of the circuit breaker corresponding to the IO device.

10. The system according to claim 7, characterized in that The IO device comprises: a ground terminal and a control port, the tripping coil of the circuit breaker corresponding to the IO device is connected to the ground terminal and the control port, and the IO device controls the circuit breaker to disconnect through the control port.

11. The system according to claim 2 or 7, characterized in that: The centralized control device is powered by a DC backup power supply and an AC power supply.

12. The system according to claim 2 or 7, characterized in that: The centralized control device is provided with a USB communication interface, and the USB interface is used to write at least one of the overload long delay protection, overload short delay protection, overload instantaneous protection and grounding protection programs.

13. The system according to claim 12, characterized in that The system is used to implement at least one of the following working modes under the control of the centralized control module: an overload long-delay protection mode, corresponding to the overload long-delay protection mode, collecting currents at the output ends of the multiple circuit breakers, and disconnecting the first circuit breaker when the current at the output end of the first circuit breaker is within a first preset current interval for more than a first time; an overload short-delay protection mode, corresponding to the overload short-delay protection mode, collecting currents at the output terminals of the multiple circuit breakers, and disconnecting the first circuit breaker when the time for which the current at the output terminal of the first circuit breaker is within a second preset current interval exceeds a second time, wherein the minimum current value of the second preset current interval is greater than the maximum current value of the first preset current interval, and the second time is less than the first time; an overload instantaneous protection mode, corresponding to the overload loss protection mode, collecting currents at the output ends of the multiple circuit breakers, and disconnecting the first circuit breaker when the current at the output end of the first circuit breaker is within a third preset current interval, wherein the minimum current value of the third preset current interval is greater than the maximum current value of the second preset current interval; A grounding protection mode corresponds to the grounding protection mode, in which currents at the output ends of the plurality of circuit breakers are collected, and in the event of a zero-sequence current at the output end of a first circuit breaker, the first circuit breaker is disconnected.

14. An electronic device, characterized in that: It comprises a centralized control and protection system as claimed in any one of claims 1 to 13.

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