Device for treating line voltage out-of-limit and control method thereof

Abstract

The invention provides a device for governing line voltage out-of-limit and a control method thereof, and the device comprises an obtaining module which is used for obtaining voltage out-of-limit statistical node data, and the statistical node data comprises out-of-limit duration, out-of-limit frequency and out-of-limit amplitude; the early warning module is used for constructing a node voltage out-of-limit early warning model according to the node data obtained by the obtaining module, inputting current meteorological information according to the node voltage out-of-limit early warning model, obtaining a voltage index and setting an index threshold value; the high-voltage svg is used for voltage adjustment, the ventilation channel is arranged at the bottom of the high-voltage svg, the mode that an inlet is large and an outlet is small is adopted, air entering the heat dissipation base is compressed, the temperature of the air entering the heat dissipation base is reduced, then the purpose of rapidly dissipating heat of the heat dissipation fins is achieved, and the situation that the temperature of the high-voltage svg is too high, so that the heat dissipation efficiency is improved is reduced. And the situation of poor voltage out-of-limit treatment is caused.

Description

Technical Field

[0001] The invention belongs to the technical field of power transmission management, and in particular to a device for managing over-limit line voltage and a control method thereof. Background Art

[0002] The voltage over-limit of distribution network includes two aspects: high voltage and low voltage. Voltage over-limit is an issue that involves the vital interests of power users. It may cause damage to electrical equipment or malfunction of electrical equipment. Power companies have been working hard to solve it for many years. However, with the rapid increase of power load and the rapid development of distributed power generation systems, the problem of voltage over-limit in distribution network has become increasingly prominent. For example, the time difference between the output of distributed power generation system and local power load can easily cause voltage over-limit; in remote rural distribution networks, low voltage problems often occur due to the large power supply radius. From a technical point of view, to solve the problem of voltage over-limit, it is necessary to accurately grasp the location and time of voltage over-limit in distribution network. However, it is far from enough to rely on manual inspection and user complaints alone. It is necessary to build a huge monitoring system that can continuously monitor voltage over-limit for a long time and record the monitoring results in real time.

[0003] At present, voltage over-limit monitoring mainly uses multifunctional and expensive power quality monitors to monitor key bus voltages. There are few monitoring points and it is difficult to cover a large area. As a result, many voltage over-limit problems cannot be discovered in time.

[0004] In summary, the present invention provides a device for controlling line voltage over-limit and a control method thereof to solve the above-mentioned problems. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a device for controlling line voltage over-limit and a control method thereof, so as to solve the problems in the prior art that voltage over-limit monitoring mainly uses a multifunctional and expensive power quality monitor to monitor the key bus voltage, there are few monitoring points, and it is difficult to cover a large area.

[0006] A device for controlling over-limit voltage of a line, comprising:

[0007] An acquisition module is used to acquire voltage over-limit statistical node data, the statistical node data includes: over-limit duration, over-limit frequency and over-limit amplitude;

[0008] The early warning module builds a node voltage over-limit early warning model based on the node data obtained by the acquisition module. Based on the node voltage over-limit early warning model, the current meteorological information can be input to obtain the voltage index and set the index threshold;

[0009] The leveling module calculates the quantitative index according to the data results of the over-limit, and sets the voltage over-limit node according to the quantitative index. After the early warning module issues an early warning, if the quantitative index is reached, the high-voltage svg is started to automatically adjust the voltage;

[0010] The control center monitors the voltage in the distribution network in real time. When the voltage exceeds the limit, the control center selects a voltage limit suppression method. The control center can use the high-voltage SVG of the distribution network to adjust the voltage. If the voltage cannot be controlled after the high-voltage SVG is involved, the control value is sent through the cloud platform database of the control center and matched to the interaction terminal of the designated operation and maintenance staff for manual adjustment.

[0011] Among them, the high-voltage svg includes a cabinet, a heat dissipation base is installed at the bottom of the cabinet, ventilation holes are respectively opened on the opposite sides of the heat dissipation base, and multiple heat dissipation holes are respectively opened on the other two sides of the heat dissipation base. Multiple ventilation channels are respectively arranged in the ventilation holes, and the multiple ventilation channels are respectively installed on the mounting seats, and the mounting seats are fixed on the surface of the ventilation holes. Heat dissipation fins are installed in the heat dissipation base.

[0012] Furthermore, the node data includes selecting historical meteorological information of a historical period at the location, sampling and processing the historical meteorological information, and obtaining multiple solar radiation illumination and ambient temperature for each day in the historical period. The acquisition module is used to obtain flow section data of different nodes, determine the nodes involved in voltage regulation in the power system, and obtain the node voltage of each node in the power grid every hour.

[0013] Furthermore, in the early warning module, the proportion of each value of the standard indicator in the corresponding category is calculated based on the historical meteorological information of the historical period to obtain the indicator probability, and the voltage over-limit node is determined using the early warning model. Based on the indicator probability and combined with the voltage over-limit node data, a comprehensive evaluation result is generated according to the indicator weight and the quantitative indicator.

[0014] Furthermore, in the early warning module, establishing the early warning model includes inputting the historical meteorological information as an input sample and the voltage evaluation index as an output sample into a deep neural network for training to obtain the early warning model.

[0015] Furthermore, in the leveling module, the obtained comprehensive evaluation results and the preset indicators, as well as the output warning information are evaluated to determine the reasons affecting the voltage over-limit and select a method for suppressing the voltage over-limit.

[0016] Furthermore, the high-voltage SVG is used to regulate the voltage and the droop control is adopted for the abnormal voltage bus node to determine the power exchange between the distributed energy storage system and the low-voltage distribution network to ensure the voltage balance of the bus node.

[0017] Furthermore, the ventilation channel includes a channel body, and openings are formed at both ends of the channel body, which are a small-diameter end and a large-diameter end respectively, and the large-diameter end is mounted on a mounting seat.

[0018] A control method for controlling line voltage over-limit, including a device for controlling line voltage over-limit, comprising the following steps:

[0019] Step 1: Use the acquisition module to establish a provincial power grid node-branch model and determine the electrical parameters of the lines and equipment, select historical meteorological information of a historical period of the location, sample and process the historical meteorological information, and obtain multiple solar radiation illumination and ambient temperature for each day in the historical period;

[0020] Step 2: Calculate the proportion of each value of the standard indicator in the corresponding category to obtain the indicator probability, and determine the indicator weight of the quantitative indicator in combination with the early warning model;

[0021] Step 3: outputting warning information according to the voltage index and the preset index threshold, determining the cause of the voltage exceeding the limit through the leveling module, and selecting a method for suppressing the voltage exceeding the limit;

[0022] Step 4: Use high voltage svg to adjust the voltage;

[0023] Step 5: When the operation and maintenance personnel in the distribution network need to manually adjust the equipment, the cloud platform database of the control center sends the specific control values ​​to the mobile terminal operation and maintenance interactive APP of the operation and maintenance personnel of the equipment in the specified distribution network. The operation and maintenance personnel adjust the equipment they are responsible for through the command data collected by the mobile terminal operation and maintenance interactive APP. The control center can send control value commands to the mobile APPs of multiple operation and maintenance personnel at the same time to achieve simultaneous coordinated adjustment of multiple devices in the distribution network.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. The present invention obtains voltage over-limit statistical data, including over-limit duration, over-limit frequency and over-limit amplitude, and calculates quantitative indicators based on the over-limit statistical data to obtain voltage regulation quality, voltage regulation efficiency, equipment quality, power grid volatility and power supply quality, standardizes these quantitative indicators, and then calculates indicator probability based on the standard indicators obtained by standardization, generates information entropy based on the indicator probability, determines the indicator weight of the quantitative indicator through the information entropy, and finally generates a comprehensive evaluation result based on the indicator weight and the quantitative indicator. The embodiment of the present invention can monitor the bus voltage over-limit situation and improve the efficiency of evaluating the bus voltage over-limit situation.

[0026] 2. The present invention uses high-voltage SVG to adjust the voltage. A ventilation channel is set at the bottom of the high-voltage SVG. The air entering the heat dissipation base is compressed by a large inlet and a small outlet, thereby reducing the temperature of the air entering the interior, thereby achieving the purpose of quickly dissipating heat from the heat dissipation fins and reducing the occurrence of poor voltage over-limit management caused by excessively high temperature of the high-voltage SVG. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a high-voltage svg stereogram of the present invention;

[0028] Figure 2 This is a disassembled diagram of the heat dissipation base of the present invention;

[0029] Figure 3 is a three-dimensional diagram of the ventilation channel of the present invention;

[0030] Figure 4 It is a flow chart of the method of the present invention.

[0031] In the figure:

[0032] 1. Cabinet; 2. Heat dissipation base; 3. Mounting base; 4. Heat dissipation holes; 5. Heat dissipation fins; 6. Ventilation channel; 601. Small-diameter end; 602. Channel body; 603. Large-diameter end; 7. Ventilation port. DETAILED DESCRIPTION

[0033] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0034] like Figure 1-4 As shown, the present invention provides a device for controlling line voltage over-limit, comprising:

[0035] An acquisition module is used to acquire voltage over-limit statistical node data, the statistical node data includes: over-limit duration, over-limit frequency and over-limit amplitude;

[0036] The early warning module builds a node voltage over-limit early warning model based on the node data obtained by the acquisition module. Based on the node voltage over-limit early warning model, the current meteorological information can be input to obtain the voltage index and set the index threshold;

[0037] The leveling module calculates the quantitative index according to the data results of the over-limit, and sets the voltage over-limit node according to the quantitative index. After the early warning module issues an early warning, if the quantitative index is reached, the high-voltage svg is started to automatically adjust the voltage;

[0038] The control center monitors the voltage in the distribution network in real time. When the voltage exceeds the limit, the control center selects a voltage limit suppression method. The control center can use the high-voltage SVG of the distribution network to adjust the voltage. If the voltage cannot be controlled after the high-voltage SVG is involved, the control value is sent through the cloud platform database of the control center and matched to the interaction terminal of the designated operation and maintenance staff for manual adjustment.

[0039] The high-voltage svg includes a cabinet 1, a heat dissipation base 2 is installed at the bottom of the cabinet 1, ventilation holes 7 are respectively opened on the opposite sides of the heat dissipation base 2, and a plurality of heat dissipation holes 4 are respectively opened on the other two sides of the heat dissipation base 2. A plurality of ventilation channels 6 are respectively arranged in the ventilation ports 7, and the plurality of ventilation channels 6 are respectively installed on the mounting base 3, and the mounting base 3 is fixed on the surface of the ventilation ports 7, and heat dissipation fins 5 are installed in the heat dissipation base 2.

[0040] As an implementation mode of the present invention, the node data includes historical meteorological information of a historical period of the selected location, and the historical meteorological information is sampled and processed to obtain multiple solar radiation illumination and ambient temperature for each day in the historical period. The acquisition module is used to obtain the flow section data of different nodes, determine the nodes involved in voltage regulation in the power system, and obtain the node voltage of each node in the power grid every hour.

[0041] As an embodiment of the present invention, in the early warning module, the proportion of each value of the standard indicator in the corresponding category is calculated based on the historical meteorological information of the historical period to obtain the indicator probability, and the voltage over-limit node is determined using the early warning model. Based on the indicator probability and combined with the voltage over-limit node data, a comprehensive evaluation result is generated according to the indicator weight and quantitative indicators.

[0042] As an implementation mode of the present invention, in the early warning module, establishing an early warning model includes inputting historical meteorological information as input samples and voltage evaluation indicators as output samples into a deep neural network for training to obtain an early warning model.

[0043] As an implementation mode of the present invention, in the leveling module, the obtained comprehensive evaluation result and the preset index, as well as the output warning information are evaluated to determine the cause of the voltage exceeding the limit, and select a method for suppressing the voltage exceeding the limit.

[0044] As an implementation mode of the present invention, high-voltage SVG is used for voltage regulation, and droop control is adopted for the abnormal voltage bus node to determine the power exchange between the distributed energy storage system and the low-voltage distribution network to ensure the voltage balance of the bus node.

[0045] As an embodiment of the present invention, the ventilation channel 6 includes a channel body 602 , and openings are formed at both ends of the channel body 602 , which are a small-diameter end 601 and a large-diameter end 603 , respectively. The large-diameter end 603 is mounted on the mounting seat 3 .

[0046] A control method for controlling line voltage over-limit, including a device for controlling line voltage over-limit, comprising the following steps:

[0047] Step 1: Use the acquisition module to establish a provincial power grid node-branch model and determine the electrical parameters of the lines and equipment, select historical meteorological information of a historical period of the location, sample and process the historical meteorological information, and obtain multiple solar radiation illumination and ambient temperature for each day in the historical period;

[0048] Step 2: Calculate the proportion of each value of the standard indicator in the corresponding category to obtain the indicator probability, and combine it with the early warning model to determine the indicator weight of the quantitative indicator;

[0049] Step 3: Output warning information according to the voltage index and the preset index threshold, determine the cause of the voltage exceeding the limit through the leveling module, and select the voltage exceeding limit suppression method;

[0050] Step 4: Use high voltage svg to adjust the voltage;

[0051] Step 5: When the operation and maintenance personnel in the distribution network need to manually adjust the equipment, the cloud platform database of the control center sends the specific control values ​​to the mobile terminal operation and maintenance interactive APP of the operation and maintenance personnel of the equipment in the specified distribution network. The operation and maintenance personnel adjust the equipment they are responsible for through the command data collected by the mobile terminal operation and maintenance interactive APP. The control center can send control value commands to the mobile APPs of multiple operation and maintenance personnel at the same time to achieve simultaneous coordinated adjustment of multiple devices in the distribution network.

[0052] The embodiments of the present invention are provided for the purpose of illustration and description. Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A device for controlling line voltage over-limit, characterized in that: include: An acquisition module is used to acquire voltage over-limit statistical node data, the statistical node data includes: over-limit duration, over-limit frequency and over-limit amplitude; The early warning module builds a node voltage over-limit early warning model based on the node data obtained by the acquisition module. Based on the node voltage over-limit early warning model, the current meteorological information can be input to obtain the voltage index and set the index threshold; The leveling module calculates the quantitative index according to the data results of the over-limit, and sets the voltage over-limit node according to the quantitative index. After the early warning module issues an early warning, if the quantitative index is reached, the high-voltage svg is started to automatically adjust the voltage; The control center monitors the voltage in the distribution network in real time. When the voltage exceeds the limit, the control center selects a voltage limit suppression method. The control center can use the high-voltage SVG of the distribution network to adjust the voltage. If the voltage cannot be controlled after the high-voltage SVG is involved, the control value is sent through the cloud platform database of the control center and matched to the interaction terminal of the designated operation and maintenance staff for manual adjustment. The high-voltage SVG comprises a cabinet (1), a heat dissipation base (2) is installed at the bottom of the cabinet (1), ventilation openings (7) are respectively provided on two opposite sides of the heat dissipation base (2), a plurality of heat dissipation holes (4) are respectively provided on the other two sides of the heat dissipation base (2), a plurality of ventilation channels (6) are respectively arranged in the ventilation openings (7), the plurality of ventilation channels (6) are respectively installed on a mounting seat (3), the mounting seat (3) is fixed on the surface of the ventilation opening (7), and heat dissipation fins (5) are installed in the heat dissipation base (2).

2. The device for controlling line voltage over-limit as claimed in claim 1, characterized in that: The node data includes selecting historical meteorological information of a historical period of the location, sampling and processing the historical meteorological information, and obtaining multiple solar radiation illumination and ambient temperature for each day in the historical period. The acquisition module is used to obtain flow section data of different nodes, determine the nodes involved in voltage regulation in the power system, and obtain the node voltage of each node in the power grid every hour.

3. The device for controlling line voltage over-limit as claimed in claim 1, characterized in that: In the early warning module, the proportion of each value of the standard indicator in the corresponding category is calculated based on the historical meteorological information of the historical period to obtain the indicator probability, and the voltage over-limit node is determined using the early warning model. Based on the indicator probability and combined with the voltage over-limit node data, a comprehensive evaluation result is generated according to the indicator weight and the quantitative indicator.

4. The device for controlling line voltage over-limit as claimed in claim 1, characterized in that: In the early warning module, establishing the early warning model includes inputting the historical meteorological information as an input sample and the voltage evaluation index as an output sample into a deep neural network for training to obtain the early warning model.

5. The device for controlling line voltage over-limit as claimed in claim 1, characterized in that: In the leveling module, the obtained comprehensive evaluation results and the preset indicators, as well as the output warning information are evaluated to determine the reasons affecting the voltage over-limit and select a method for suppressing the voltage over-limit.

6. The device for controlling line voltage over-limit as claimed in claim 1, characterized in that: The high-voltage SVG is used to regulate the voltage and the droop control is used for the abnormal voltage bus node to determine the power exchange between the distributed energy storage system and the low-voltage distribution network to ensure the voltage balance of the bus node.

7. The device for controlling line voltage over-limit as claimed in claim 1, characterized in that: The ventilation channel (6) comprises a channel body (602), and openings are provided at both ends of the channel body (602), which are respectively a small-diameter end (601) and a large-diameter end (603), and the large-diameter end (603) is mounted on the mounting seat (3).

8. A control method for controlling line voltage over-limit, comprising the device for controlling line voltage over-limit as claimed in claims 1 to 7, characterized in that: The following steps are involved: Step 1: Use the acquisition module to establish a provincial power grid node-branch model and determine the electrical parameters of the lines and equipment, select historical meteorological information of a historical period of the location, sample and process the historical meteorological information, and obtain multiple solar radiation illumination and ambient temperature for each day in the historical period; Step 2: Calculate the proportion of each value of the standard indicator in the corresponding category to obtain the indicator probability, and determine the indicator weight of the quantitative indicator in combination with the early warning model; Step 3: outputting warning information according to the voltage index and the preset index threshold, determining the cause of the voltage exceeding the limit through the leveling module, and selecting a method for suppressing the voltage exceeding the limit; Step 4: Use high voltage svg to adjust the voltage; Step 5: When the operation and maintenance personnel in the distribution network need to manually adjust the equipment, the cloud platform database of the control center sends the specific control values ​​to the mobile terminal operation and maintenance interactive APP of the operation and maintenance personnel of the equipment in the specified distribution network. The operation and maintenance personnel adjust the equipment they are responsible for through the command data collected by the mobile terminal operation and maintenance interactive APP. The control center can send control value commands to the mobile APPs of multiple operation and maintenance personnel at the same time to achieve simultaneous coordinated adjustment of multiple devices in the distribution network.

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