Power supply monitoring system of power system

Abstract

The invention discloses a power supply monitoring system for a power system. The power supply monitoring system is characterized by comprising a sensor module, a data acquisition module, a data processing module, an alarm module and an execution module, the data acquisition module is used for acquiring electric power parameter signals of the sensor module; the data processing module comprises an alarm judgment unit and a control instruction output unit, and the alarm judgment unit sets a warning threshold value and an alarm threshold value; in the normal operation stage, when the power parameters do not exceed the warning threshold value, the data processing module sends out prompt information; when the electric power parameter exceeds an alarm threshold value, the data processing module triggers the alarm module to give an alarm through the control instruction output unit, and meanwhile, the electric power system is closed through the execution module; and in the load peak period, the alarm threshold value is dynamically adjusted. Safety monitoring of a power system is realized, false alarm operation is reduced, and normal power supply in peak hours is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of power supply monitoring, and specifically to a power supply monitoring system for a power system. Background Art

[0002] The distribution network is at the end of the power system and has distinct characteristics such as wide geographical distribution, large grid scale, diverse equipment types, diverse network connections, and variable operation modes. With the growth of urbanization construction and electricity demand, the distribution network has been continuously renovated and expanded, and its scale has also been continuously expanding. The scale of most distribution networks above the county level in the State Grid Corporation system has reached more than a hundred feeders, and the medium-voltage feeders in some medium and large cities have reached or exceeded a thousand.

[0003] At present, the monitoring scheme of the power system is a power supply monitoring unit based on service circuits, which consists of a collection module and a processing module. The collection module is used to collect AC power supply, voltage, and rectifier module status, and send the collected real-time status to the processing module. The processing module processes the signal and performs corresponding operations, and performs alarm and power-off operations when certain parameters exceed the threshold. It meets the requirements for daily power supply, but during peak electricity consumption periods, false alarm operations or power-off phenomena will occur, affecting normal power supply and needing improvement. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the existing defects, provide a power supply monitoring system for a power system, realize the safety monitoring of the power system, reduce false alarm operations, and ensure normal power supply during peak periods, which can effectively solve the problems in the background art.

[0005] To achieve the above object, the present invention provides the following technical solution: A power supply monitoring system for a power system, including a sensor module, a data collection module, a data processing module, an alarm module, and an execution module; The data processing module is respectively connected to the data collection module, the alarm module, and the execution module; the data collection module is used to collect the power parameter signals of the sensor module; The data processing module includes an alarm determination unit and a control instruction output unit, and the alarm determination unit sets a warning threshold and an alarm threshold; During the normal operation stage, when the power parameters do not exceed the warning threshold, the data processing module issues a prompt message; when the power parameters exceed the alarm threshold, the data processing module triggers the alarm module to alarm through the control instruction output unit, and at the same time closes the power system through the execution module; during the peak load stage, the alarm threshold is dynamically adjusted.

[0006] Preferably, the dynamically adjusted alarm threshold is expressed as follows: , where: is the basic alarm threshold; is the real-time load; is the historical average load; is the adjustment factor, used to control the sensitivity of threshold adjustment, and its value ranges from 0 to 1.

[0007] Preferably, the sensor module includes a voltage sensor, a current sensor, and a power sensor, which respectively measure voltage, current, and power, and at least two voltage sensors, current sensors, and power sensors are provided.

[0008] Preferably, it further includes a user interface module. The user interface module is connected to the data processing module. The user interface module displays the power parameters of the sensor module, historical data, prompt information, and alarm information. The user interface module is a liquid crystal display screen or a touch screen.

[0009] Preferably, the alarm module at least includes a sound alarm unit and a light alarm unit. The sound alarm unit gives a sound alarm according to the alarm determination unit of the data processing module, and the light alarm unit gives a light alarm according to the alarm determination unit of the data processing module.

[0010] Preferably, it further includes a remote device. The remote device is connected to the data processing module, and the remote device is used to view the data of the data processing module.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: The data acquisition module is used to collect the power parameter signals of the sensor module. The data processing module processes the power parameter signals. The threshold set by the alarm determination unit is compared with the power parameters and corresponding processing results are executed. The threshold is dynamically adjusted during the peak load period to reduce false alarm operations, avoid the execution module from shutting down the power system, and ensure normal power supply during the peak period. Description of the Drawings

[0012] Figure 1 is the structural block diagram of the present invention. Detailed Embodiments

[0013] The present invention can be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention. In the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "front", "rear", "left", "right", etc. indicating the orientation or position relationship, they are only corresponding to the drawings of the present application. For the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation.

[0014] Please refer to Figure 1, the present invention provides a technical solution: a power system power supply monitoring system, including a sensor module, a data acquisition module, a data processing module, an alarm module and an execution module; The data processing module is respectively connected to the data acquisition module, the alarm module and the execution module; the data acquisition module is used to collect the power parameter signals of the sensor module; The data processing module includes an alarm determination unit and a control instruction output unit, and the alarm determination unit sets a warning threshold and an alarm threshold; In the normal operation stage, when the power parameters do not exceed the warning threshold, the data processing module issues a prompt message; when the power parameters exceed the alarm threshold, the data processing module triggers the alarm module to alarm through the control instruction output unit, and at the same time also shuts down the power system through the execution module; in the peak load stage, the alarm threshold is dynamically adjusted; The dynamically adjusted alarm threshold is expressed as follows: , where: is the basic alarm threshold; is the real-time load; is the historical average load; is the adjustment factor, which is used to control the sensitivity of the threshold adjustment, and its value ranges from 0 to 1; During the peak electricity consumption period, the power parameters will fluctuate greatly and exceed the originally set alarm threshold. Therefore, it is necessary to dynamically adjust the alarm threshold again, that is, increase the alarm threshold range, so as to reduce false alarm operations, and at the same time avoid the execution module from shutting down the power system, ensuring normal power supply during the peak period; Further, the sensor module includes a voltage sensor, a current sensor and a power sensor, which respectively measure voltage, current and power, and at least two voltage sensors, current sensors and power sensors are provided, with redundant design to avoid a single data error; Further, it also includes a user interface module, which is connected to the data processing module. The user interface module displays the power parameters of the sensor module, historical data, prompt messages and alarm messages. The user interface module is a liquid crystal display or a touch screen, which is convenient for users to view and operate in real time; Further, the alarm module includes at least a sound alarm unit and a light alarm unit. The sound alarm unit alarms according to the alarm determination unit of the data processing module, and the light alarm unit alarms according to the alarm determination unit of the data processing module; Further, it also includes a remote device, which is connected to the data processing module. The remote device is used to view the data of the data processing module for remote monitoring and viewing.

[0015] The parts not detailed in the present invention are prior arts. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, aiming to include all changes falling within the meaning and scope of the equivalent elements in the content of the present invention.

Claims

1. A power supply monitoring system for an electric power system, characterized in that: It includes a sensor module, a data acquisition module, a data processing module, an alarm module and an execution module; The data processing module is connected to the data acquisition module, the alarm module and the execution module respectively; the data acquisition module is used to collect the power parameter signal of the sensor module; The data processing module includes an alarm determination unit and a control instruction output unit, and the alarm determination unit sets a warning threshold and an alarm threshold; During the normal operation stage, when the power parameters do not exceed the warning threshold, the data processing module issues a prompt message; when the power parameters exceed the alarm threshold, the data processing module triggers the alarm module to sound an alarm through the control instruction output unit, and also shuts down the power system through the execution module; during the peak load period, the alarm threshold is dynamically adjusted.

2. The power supply monitoring system of the power system according to claim 1, characterized in that: The dynamically adjusted alarm threshold It is expressed as follows: ,in: is the basic alarm threshold; For real-time load; is the historical average load; is the adjustment factor used to control the sensitivity of threshold adjustment. The value is 0-1.

3. The power supply monitoring system of an electric power system according to claim 1, characterized in that: The sensor module includes a voltage sensor, a current sensor and a power sensor, which measure voltage, current and power respectively, and at least two of each of the voltage sensor, the current sensor and the power sensor are provided.

4. The power supply monitoring system of an electric power system according to claim 1, characterized in that: It also includes a user interface module, which is connected to the data processing module. The user interface module displays the power parameters of the sensor module, displays historical data, prompt information and alarm information, and the user interface module is a liquid crystal display or a touch screen.

5. The power supply monitoring system of an electric power system according to claim 1, characterized in that: The alarm module at least includes a sound alarm unit and a light alarm unit. The sound alarm unit performs a sound alarm according to the alarm determination unit of the data processing module, and the light alarm unit performs a light alarm according to the alarm determination unit of the data processing module.

6. The power supply monitoring system of an electric power system according to claim 1, characterized in that: It also includes a remote device, which is connected to the data processing module and is used to view the data of the data processing module.

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