An integrated power supply system for monitoring DC system insulation

Abstract

The present invention provides an integrated power supply system for monitoring the insulation of a DC system, belongs to the technical field of power supply monitoring, and comprises a communication module, a detection module, a state management module, and a decision module; the communication module is used for transmitting monitoring data generated in a monitoring process, and the monitoring data comprises voltage, current, operating state, and fault information; the detection module is used for detecting voltage and current values, and the detected data are sent to the decision module through the communication module; the state management module is used for managing the operating state of the system, and the operating state comprises the working state of the communication module and the execution state of the decision module; the present invention can perform operating state management on the conditions occurring during monitoring by setting the state management module, realize the switching mechanism of the communication module, and ensure the effectiveness and real-time performance of the communication data transmission of the monitoring.

Description

Technical Field

[0001] The present invention relates to the technical field of power supply monitoring, and in particular to an integrated power supply system for monitoring the insulation of a direct current system. Background Art

[0002] In modern industrial and power systems, DC power supplies are widely used, but long-term operation may lead to a decline in insulation performance and increase the risk of failure. Therefore, DC power supply insulation monitoring is very important. Insulation grounding monitoring can detect the insulation condition of the system in real time, issue early warnings and accurately locate the fault point to ensure timely processing and prevent electrical accidents. In order to ensure the continuity of data transmission, the monitoring system must have the function of recovering from interruptions in communication. However, the current monitoring system cannot guarantee the continued transmission of data after the communication transmission module is interrupted, which may cause lag in monitoring information and cause verification losses. Summary of the invention

[0003] In response to the above technical problems, the present invention provides an integrated power supply system for monitoring the insulation of a DC system, comprising a communication module, a detection module, a status management module, and a decision module; the communication module is used to transmit monitoring data generated during the monitoring process, and the monitoring data includes voltage, current, operating status, and fault information; the detection module is used to detect the voltage and current values, and the detected data is sent to the decision module through the communication module; the status management module is used to manage the operating status of the system, and the operating status includes the working status of the communication module and the execution status of the decision module; the decision module is used to make decisions based on preset parameters and monitoring data, and generate execution instructions for decision information.

[0004] Furthermore, the communication module includes multiple communication units, each communication unit has a unique communication number, and the communication unit is provided with an operation status bit, which is used to describe the working status of the communication unit, and the operation status bit is managed by the status management module.

[0005] Furthermore, the status management module is provided with a switching management unit, and a sentinel queue is provided in the switching management unit. The sentinel queue is a first-in-first-out data structure for storing the communication number of the communication unit. The switching management module is used to enable the first communication unit in the sentinel queue, and the running status bit of the enabled communication unit is modified to the running state, and the running status bit of the next communication unit is modified to the ready state; the communication unit whose running status bit is the running state is used as the current communication channel.

[0006] Furthermore, the communication module is provided with a data cache area, and the multi-channel communication units of the communication module share the same data cache area, and the data cache area is used to store data that fails to be sent. The data cache area is a fixed-length circular queue, and the head and tail index information of the queue is managed by the switching management unit.

[0007] Furthermore, the management method of the communication module by the switching management unit includes:

[0008] The switching management unit obtains the communication number of the first communication unit in the sentinel queue, checks the running status of the current communication unit, and if it is not in the running state, immediately changes the running state of the current communication unit to the running state; if the current communication unit has a number of sending failures greater than the number of failures of the preset parameters, the switching management unit changes the running state of the current communication unit to the terminated state, and sets the next communication unit with the ready state to the running state, checks the data in the data cache, and resends the data in the data cache.

[0009] Furthermore, the monitoring method for insulation grounding of a DC system includes receiving insulation grounding alarm information through a decision module, at which time the state management module sets the alarm information to a first virtual state, and then measures the voltage between the positive pole and the ground and the negative pole and the ground through a detection module. If there is voltage, the first virtual state is modified to a second virtual state; if there is no voltage, the first virtual state is eliminated; the first virtual state is used to identify that the current alarm information is in a pending confirmation stage, and the second virtual state is used to describe the current alarm information as actual alarm information.

[0010] Furthermore, the decision module obtains the alarm information of the second virtual state, and obtains the insulation CT signal value through the detection module, and then the decision module generates a disconnection of the insulation grounding branch, obtains the insulation CT signal value again, and the decision module determines whether the CT signal value is within the normal range of the preset parameters; if it exceeds the normal range, the technical staff is notified to repair the alarm information here.

[0011] Compared with the prior art, the present invention has the following advantages: (1) by setting up a status management module, the present invention can manage the operating status of the conditions occurring during monitoring, realize the switching mechanism of the communication module, and ensure the effectiveness and real-time transmission of the monitored communication data; (2) by detecting and judging the insulation grounding of the DC system through the detection module and the decision module, the insulation grounding warning in the DC system can be detected, and the risk can be eliminated in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 An exemplary block diagram of the present invention. DETAILED DESCRIPTION

[0013] Example: Figure 1An integrated power supply system for monitoring the insulation of a DC system is shown, comprising a communication module, a detection module, a status management module, and a decision module; the communication module is used to transmit the monitoring data generated during the monitoring process, and the monitoring data includes voltage, current, operating status, and fault information; the detection module is used to detect the voltage and current values, and the detected data is sent to the decision module through the communication module; the status management module is used to manage the operating status of the system, and the operating status includes the working status of the communication module and the execution status of the decision module; the decision module is used to make decisions based on preset parameters and monitoring data, and generate execution instructions for decision information.

[0014] The communication module contains multiple communication units. Each communication unit has a unique communication number. The communication unit is set with an operation status bit, which is used to describe the working status of the communication unit. The operation status bit is managed by the status management module. The communication number of the communication unit starts from zero and is identified by a hexadecimal number with a value range of 0x00~0xFF.

[0015] The status management module is provided with a switching management unit, and a sentinel queue is provided in the switching management unit. The sentinel queue is a first-in-first-out data structure for storing the communication number of the communication unit. The switching management module is used to enable the first communication unit in the sentinel queue, and the running status bit of the enabled communication unit is modified to the running state, and the running status bit of the next communication unit is modified to the ready state; the communication unit with the running status bit in the running state is used as the current communication channel.

[0016] The communication module is provided with a data buffer area. The multi-channel communication units of the communication module share the same data buffer area. The data buffer area is used to store data that failed to be sent. The data buffer area is a fixed-length circular queue. The head and tail index information of the queue is managed by the switching management unit.

[0017] In this embodiment, the management method of the switching management unit for the communication module includes:

[0018] The switching management unit obtains the communication number of the first communication unit in the sentinel queue, checks the running status of the current communication unit, and if it is not in the running state, immediately changes the running state of the current communication unit to the running state; if the current communication unit has a number of sending failures greater than the number of failures of the preset parameters, the switching management unit changes the running state of the current communication unit to the terminated state, and sets the next communication unit with the ready state to the running state, checks the data in the data cache, and resends the data in the data cache.

[0019] The monitoring method for insulation grounding of a DC system includes receiving insulation grounding alarm information through a decision module, at which time the state management module sets the alarm information to a first virtual state, and then measures the voltage between the positive pole and the ground and the negative pole and the ground through a detection module. If there is voltage, the first virtual state is modified to a second virtual state; if there is no voltage, the first virtual state is eliminated; the first virtual state is used to identify that the current alarm information is in a pending confirmation stage, and the second virtual state is used to describe the current alarm information as actual alarm information.

[0020] The decision module obtains the alarm information of the second virtual state, and obtains the insulation CT signal value through the detection module. Then the decision module generates a disconnection of the insulation grounding branch and obtains the insulation CT signal value again. The decision module determines whether the CT signal value is within the normal range of the preset parameters. If it exceeds the normal range, the technician is notified to repair the alarm information here.

[0021] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0022] The above contents are merely examples and explanations of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described, or replace them in similar ways, which shall fall within the protection scope of the present invention as long as they do not deviate from the invention or exceed the scope defined by the claims.

Claims

1. An integrated power supply system for monitoring the insulation of a DC system, characterized in that: It includes a communication module, a detection module, a state management module, and a decision module; the communication module is used to transmit the monitoring data generated during the monitoring process, and the monitoring data includes voltage, current, operating status, and fault information; the detection module is used to detect the voltage and current values, and the detected data is sent to the decision module through the communication module; the state management module is used to manage the operating status of the system, and the operating status includes the working status of the communication module and the execution status of the decision module; the decision module is used to make decisions based on preset parameters and monitoring data, and generate execution instructions for decision information; The communication module includes multiple communication units, each communication unit has a unique communication number, and the communication unit is provided with an operation status bit, which is used to describe the working status of the communication unit, and the operation status bit is managed by the status management module; The state management module is provided with a switching management unit, and a sentinel queue is provided in the switching management unit. The sentinel queue is a first-in-first-out data structure for storing the communication number of the communication unit. The switching management module is used to enable the first communication unit in the sentinel queue, and the operation status bit of the enabled communication unit is modified to the running state, and the operation status bit of the next communication unit is modified to the ready state; the communication unit whose operation status bit is the running state is used as the current communication channel; The communication module is provided with a data buffer area, and the multi-channel communication units of the communication module share the same data buffer area, and the data buffer area is used to store data that fails to be sent. The data buffer area is a fixed-length circular queue, and the head and tail index information of the queue are managed by the switching management unit; A method for managing a communication module by a switching management unit includes: The switching management unit obtains the communication number of the first communication unit in the sentinel queue, checks the running status of the current communication unit, and if it is not in the running state, immediately changes the running state of the current communication unit to the running state; If the number of transmission failures of the current communication unit is greater than the number of failures of the preset parameter, the switching management unit changes the operation state of the current communication unit to the termination state, and sets the next communication unit whose operation state is the ready state to the operation state, checks the data in the data buffer area, and resends the data in the data buffer area; The monitoring method for insulation grounding of a DC system includes receiving insulation grounding alarm information through a decision module, at which time the state management module sets the alarm information to a first virtual state, and then measuring the voltage between the positive pole and the ground and the negative pole and the ground through a detection module. If there is a voltage, the first virtual state is modified to a second virtual state; if there is no voltage, the first virtual state is eliminated; the first virtual state is used to identify that the current alarm information is in a pending confirmation stage, and the second virtual state is used to describe that the current alarm information is actual alarm information; The decision module obtains the alarm information of the second virtual state, and obtains the insulation CT signal value through the detection module. Then the decision module generates an instruction to disconnect the insulation grounding branch, and obtains the insulation CT signal value again. The decision module determines whether the CT signal value is within the normal range of the preset parameters; if it exceeds the normal range, the technical staff is notified to repair the alarm information here.

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