Active area electric energy quality monitoring system and method

Abstract

The invention provides an active transformer area electric energy quality monitoring system comprising an electric energy signal acquisition module used for acquiring a current signal and a voltage signal of a power distribution network; the central processing unit is connected with the electric energy signal acquisition module, and the central processing unit receives the current signals and the voltage signals acquired by the electric energy signal acquisition module and performs simulation analysis to generate electric energy quality data; the storage module is connected with the central processing unit and is used for storing the current signal data, the voltage signal data and the electric energy quality data; the remote communication module is connected with the central processing unit, the remote communication module is in wireless communication connection with a background server, and the remote communication module is used for transmitting electric energy quality data to the background server; the power quality problem can be monitored according to the real-time current and voltage values of the power distribution network, the monitoring timeliness is improved, and stable operation of the power distribution network is ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of electric energy monitoring, and in particular relates to an active area electric energy quality monitoring system and method. Background Art

[0002] After the distributed photovoltaic is connected, the power quality of the distribution network is mainly affected by voltage deviation, voltage sag, voltage swell, voltage fluctuation, three-phase imbalance, harmonics, etc. In order to solve the problems that affect the power quality of the distribution network, it is necessary to first understand the specific situation of the power quality problems of the distribution network lines.

[0003] However, relying on electrical instruments and control devices to achieve power distribution, control, protection, monitoring and other functions, and then relying heavily on manual monitoring, management, manual calculation and report generation of the power grid operation status, leads to untimely data feedback, reduced timeliness of power quality monitoring, and is not conducive to timely detection of abnormalities, resulting in the inability to make timely adjustments, affecting the stable operation of the distribution network.

[0004] Therefore, it is necessary to design an active substation power quality monitoring system and method to solve the current technical problems based on the real-time current and voltage values ​​of the distribution network, complete power quality problem monitoring, improve the timeliness of monitoring, and ensure the stable operation of the distribution network. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides an active area power quality monitoring system and method for completing power quality problem monitoring based on real-time current and voltage values ​​of the distribution network, improving monitoring timeliness, and ensuring stable operation of the distribution network.

[0006] The technical solution of the present invention is: an active substation power quality monitoring system, comprising: a power signal acquisition module, the power signal acquisition module is used to acquire current signals and voltage signals of the distribution network; a central processing unit, the central processing unit is connected to the power signal acquisition module, the central processing unit receives the current signals and voltage signals acquired by the power signal acquisition module and performs simulation analysis to generate power quality data; a storage module, the storage module is connected to the central processing unit, and is used to store current signal data, voltage signal data and power quality data; a remote communication module, the remote communication module is connected to the central processing unit, the remote communication module is wirelessly connected to a background server, and is used to transmit power quality data to the background server.

[0007] The electric energy signal acquisition module has an electric energy signal analog-to-digital converter, and the electric energy signal analog-to-digital converter is connected to a current transformer and a voltage transformer. The current transformer and the voltage transformer are connected in coordination with the power distribution network line.

[0008] The output end of the electric energy signal analog-to-digital converter is connected to an aviation plug, and the central processing unit is connected to an aviation socket matching the aviation plug.

[0009] The central controller is connected to a multi-loop temperature sampling module, and the multi-loop temperature sampling module is used to collect the temperature value of at least one measuring point.

[0010] The multi-loop temperature sampling module has a temperature analog-to-digital converter, and at least one temperature sensor is connected to the stable analog-to-digital converter.

[0011] The active substation power quality monitoring system also includes a box, the central processing unit, storage module, and remote communication module are all arranged inside the box, a heat dissipation component is arranged on the outside of the box, a heat dissipation hole is opened on the top of the heat dissipation cover, the heat dissipation fan is arranged inside the lower end of the heat dissipation hole, and a fan grille is arranged inside the upper end of the heat dissipation hole.

[0012] The heat dissipation cover is sleeved on both sides and the top of the box body, and heat dissipation fins are evenly arranged between the inner side of the heat dissipation cover and the outer side of the box body.

[0013] The central processing unit is connected with a cooling fan.

[0014] The central controller is connected to a human-machine interface, and the human-machine interface is used to display current signal data, voltage signal data and power quality data.

[0015] The method for monitoring power quality in an active area comprises the following steps: S1, using the active area power quality monitoring system as described in any one of claims 1 to 9; S2, obtaining current signal data and voltage signal data of monitoring points in the distribution network through the electric energy signal acquisition module; S3, the central processing unit generates power quality data by analyzing the collected current signal data and voltage signal data and stores it in the storage module; S4, the central processor transmits the power quality data to the background server through the remote communication module.

[0016] Beneficial effects of the present invention: In the present invention, the current signal data and voltage signal data of the monitoring points in the distribution network are obtained through the electric energy signal acquisition module. The central processing unit generates power quality data by analyzing the collected current signal data and voltage signal data and stores it in the storage module. At the same time, the central processing unit transmits the power quality data to the background server through the remote communication module. Relevant personnel can view the power quality data on the background server and can discover abnormal power quality in time, thereby realizing the monitoring of power quality problems, improving the timeliness of monitoring, and ensuring the stable operation of the distribution network. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a principle block diagram of the active area power quality monitoring system in the present invention.

[0018] Figure 2 It is a principle block diagram of the electric energy signal acquisition module in the present invention.

[0019] Figure 3 This is a principle block diagram of the multi-loop temperature sampling module in the present invention.

[0020] Figure 4 This is one of the structural schematic diagrams of the heat dissipation component in the present invention.

[0021] Figure 5 This is the second structural schematic diagram of the heat dissipation component in the present invention.

[0022] Figure 6 for Figure 5 Cross-section view at AA in the middle. DETAILED DESCRIPTION

[0023] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is not intended to be any limitation on the present invention and its application or use. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the present invention thorough and complete and to fully express the scope of the present invention to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the parts and steps, the composition of the materials, the numerical expressions and the numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary and not as limitations.

[0024] The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different parts. The words "include" or "comprise" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0025] like Figure 1 As shown, the active area power quality monitoring system includes: a power signal acquisition module 2, the power signal acquisition module 2 is used to collect current signals and voltage signals of the distribution network; a central processing unit 1, the central processing unit 1 is connected to the power signal acquisition module 2, the central processing unit 1 receives the current signal and voltage signal collected by the power signal acquisition module 2 and performs simulation analysis to generate power quality data; a storage module 4, the storage module 4 is connected to the central processing unit 1, and is used to store current signal data, voltage signal data and power quality data; a remote communication module 5, the remote communication module 5 is connected to the central processing unit 1, and the remote communication module 5 is wirelessly connected to the background server for transmitting power quality data to the background server In this embodiment, the current signal data and voltage signal data of the monitoring points in the distribution network are obtained through the power signal acquisition module 2. The central processing unit 1 generates power quality data by analyzing the collected current signal data and voltage signal data and stores it in the storage module. At the same time, the central processing unit transmits the power quality data to the background server through the remote communication module. Relevant personnel can view the power quality data on the background server and can discover abnormal power quality in time, thereby realizing the monitoring of power quality problems, improving the timeliness of monitoring, and ensuring the stable operation of the distribution network. The power quality data includes monitoring data such as voltage deviation, voltage sag, voltage swell, voltage fluctuation, three-phase imbalance, and harmonics.

[0026] In some embodiments, Figure 2 As shown, the electric energy signal acquisition module 2 has an electric energy signal analog-to-digital converter 21, and the electric energy signal analog-to-digital converter 21 is connected to a current transformer 22 and a voltage transformer 23. The current transformer 22 and the voltage transformer 23 are connected to the power distribution network line. The current transformer 22 and the voltage transformer 23 are used to collect the current signal and the voltage signal of the power distribution network line and output the current analog signal and the voltage analog signal. The electric energy signal analog-to-digital converter 21 converts the current analog signal and the voltage analog signal into a current digital signal and a voltage digital signal.

[0027] In some embodiments, the output end of the power signal analog-to-digital converter 21 is connected to an aviation plug, and the central processing unit 1 is connected to an aviation socket matching the aviation plug. The power signal analog-to-digital converter 21 and the central processing unit 1 are quickly connected through the cooperation of the aviation plug and the aviation socket. When the power signal acquisition module 2 fails, the power signal acquisition module 2 can be quickly disassembled and replaced by plugging and unplugging the aviation plug and the aviation socket, thereby improving maintenance convenience.

[0028] In some embodiments, a multi-loop temperature sampling module 7 is connected to the central controller 1, and the multi-loop temperature sampling module 7 is used to collect the temperature value of at least one measuring point. The multi-loop temperature sampling module 7 can monitor the temperature of multiple measuring points in the system during operation, and can promptly detect temperature abnormalities when they occur.

[0029] In some embodiments, Figure 3 As shown, the multi-loop temperature sampling module 7 has a temperature analog-to-digital converter 71, and at least one temperature sensor 72 is connected to the stable analog-to-digital converter 71. The temperature sensor 72 is used to detect the temperature of the measuring point and output a temperature analog value. The temperature analog-to-digital converter 71 converts the analog temperature value output by the temperature sensor 72 into a digital temperature value.

[0030] In some embodiments, Figures 4 to 6 As shown, the active substation power quality monitoring system also includes a box 8, a central processing unit 1, a storage module 4, and a remote communication module 5 are all arranged inside the box 1, and a heat dissipation component 9 is arranged on the outside of the box. The heat dissipation component 9 has a heat dissipation cover 91 arranged on the outside of the box 8, and a heat dissipation hole 92 is opened on the top of the heat dissipation cover 91. The heat dissipation fan 3 is arranged inside the lower end of the heat dissipation hole 92, and a fan grille 93 is arranged inside the upper end of the heat dissipation hole 92. When the temperature sensor 72 determines that the internal temperature of the box 8 is higher than the set value, the heat dissipation fan 3 is started, and the heat dissipation fan 3 drives the external air to enter the inside of the heat dissipation cover 91 from the bottom thereof, and then is discharged outward from the heat dissipation hole 92, thereby accelerating the air flow outside the box 8 and improving the heat dissipation effect of the box 8.

[0031] In some embodiments, the heat dissipation cover 91 is mounted on both sides and the top of the box body 8, and heat dissipation fins 94 are evenly arranged between the inner side of the heat dissipation cover 91 and the outer side of the box body 8. The strength of the heat dissipation cover 91 is improved through the supporting effect of the heat dissipation fins 94 inside the box body 8. At the same time, the heat dissipation fins 94 increase the heat dissipation area, thereby improving the heat dissipation effect.

[0032] In some embodiments, a cooling fan 3 is connected to the central processing unit 1 , and the central processing unit 1 controls the start and stop of the cooling fan 3 according to the temperature value obtained by the temperature sensor 72 .

[0033] In some embodiments, the central controller 1 is connected to a human-machine interface 6, and the human-machine interface 6 is used to display current signal data, voltage signal data and power quality data.

[0034] In some embodiments, a method for monitoring power quality in an active area is disclosed, comprising the following steps: S1, using the active area power quality monitoring system in any of the above embodiments; S2, obtaining current signal data and voltage signal data of monitoring points in the distribution network through the electric energy signal acquisition module; S3, the central processing unit generates power quality data by analyzing the collected current signal data and voltage signal data and stores it in the storage module; S4, the central processor transmits the power quality data to the background server through the remote communication module.

[0035] So far, various embodiments of the present invention have been described in detail. In order to avoid obscuring the concept of the present invention, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed here.

[0036] The above-mentioned embodiments only express some implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be based on the attached claims.

Claims

1. An active area power quality monitoring system, characterized in that: include: An electric energy signal acquisition module, which is used to acquire current signals and voltage signals of the power distribution network; A central processing unit, the central processing unit is connected to the electric energy signal acquisition module, the central processing unit receives the current signal and the voltage signal acquired by the electric energy signal acquisition module and performs simulation analysis to generate electric energy quality data; A storage module, the storage module is connected to the central processing unit and is used to store current signal data, voltage signal data and power quality data; A remote communication module is connected to the central processing unit, and the remote communication module is wirelessly connected to the background server for transmitting power quality data to the background server.

2. The active area power quality monitoring system according to claim 1 is characterized in that: The electric energy signal acquisition module has an electric energy signal analog-to-digital converter, and the electric energy signal analog-to-digital converter is connected to a current transformer and a voltage transformer. The current transformer and the voltage transformer are connected in coordination with the power distribution network line.

3. The active area power quality monitoring system according to claim 2 is characterized in that: The output end of the electric energy signal analog-to-digital converter is connected to an aviation plug, and the central processing unit is connected to an aviation socket matching the aviation plug.

4. The active area power quality monitoring system according to claim 1 is characterized in that: The central controller is connected to a multi-loop temperature sampling module, and the multi-loop temperature sampling module is used to collect the temperature value of at least one measuring point.

5. The active area power quality monitoring system according to claim 4 is characterized in that: The multi-loop temperature sampling module has a temperature analog-to-digital converter, and at least one temperature sensor is connected to the stable analog-to-digital converter.

6. The active area power quality monitoring system according to claim 5 is characterized in that: It also includes a box body, the central processing unit, the storage module, and the remote communication module are all arranged inside the box body, a heat dissipation component is arranged on the outside of the box body, a heat dissipation hole is opened on the top of the heat dissipation cover, the heat dissipation fan is arranged inside the lower end of the heat dissipation hole, and a fan grille is arranged inside the upper end of the heat dissipation hole.

7. The active area power quality monitoring system according to claim 6 is characterized in that: The heat dissipation cover is sleeved on both sides and the top of the box body, and heat dissipation fins are evenly arranged between the inner side of the heat dissipation cover and the outer side of the box body.

8. The active area power quality monitoring system according to claim 6 is characterized in that: The central processing unit is connected with a cooling fan.

9. The active area power quality monitoring system according to claim 1, characterized in that: The central controller is connected to a human-machine interface, and the human-machine interface is used to display current signal data, voltage signal data and power quality data.

10. A method for monitoring power quality in an active area, characterized in that: The following steps are involved: S1, using the active area power quality monitoring system as described in any one of claims 1 to 9; S2, obtaining current signal data and voltage signal data of monitoring points in the distribution network through the electric energy signal acquisition module; S3, the central processing unit generates power quality data by analyzing the collected current signal data and voltage signal data and stores it in the storage module; S4, the central processor transmits the power quality data to the background server through the remote communication module.

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