CN117937450A

CN117937450A - Power quality abnormality processing method and related device for power distribution network

Info

Publication number: CN117937450A
Application number: CN202410056544.3A
Authority: CN
Inventors: 史帅彬; 肖鸣; 王昕�
Original assignee: Shenzhen Power Supply Bureau Co Ltd
Current assignee: Shenzhen Power Supply Bureau Co Ltd
Priority date: 2024-01-15
Filing date: 2024-01-15
Publication date: 2024-04-26

Abstract

The application provides a processing method and a related device for power quality abnormality of a power distribution network, wherein the method comprises the following steps: firstly, a server detects electrification of each transformer substation secondary direct current loop in at least one transformer substation secondary direct current loop with abnormal electric energy quality by using a Hall sensor; and then determining whether the corresponding secondary direct current loop of the transformer substation needs to be overhauled and maintained according to the charged detection result, thereby effectively improving the accuracy and timeliness of solving the problem of abnormal power quality of the power distribution network and further improving the power quality of the whole power distribution network.

Description

Power quality abnormality processing method and related device for power distribution network

Technical Field

The application relates to the technical field of power distribution network design, in particular to a method and a related device for processing abnormal power quality of a power distribution network.

Background

The potential for power quality anomalies is due to a variety of reasons, one of which includes the correctness of the secondary dc loop of the substation. The correctness of the secondary direct current loop of the transformer substation is directly related to whether the system tide can be faithfully reflected, whether the electric energy metering can be accurately recorded, and whether the electric energy quality assessment is accurate and reliable. For some hidden secondary direct current loop hidden dangers, such as two-point grounding, wiring errors and the like, the hidden secondary direct current loop hidden dangers can be easily ignored in secondary installation, routine maintenance and on-load inspection, and the hidden secondary direct current loop hidden dangers can influence power grid data after a power grid starts to operate, so that the evaluation of the power quality is affected.

In the existing power quality abnormality detection scheme, detection is usually performed on a power distribution network power line, the scale and complexity of the power distribution network power line are high, the power distribution network power line detection cannot timely, accurately and rapidly solve the problem of power quality abnormality, and pertinence is lacking.

Disclosure of Invention

The application provides a processing method and a related device for power quality abnormality of a power distribution network, when the power quality is abnormal, the secondary direct current loop of a transformer substation with abnormal power quality is electrified detected, and overhauling and maintaining are carried out on the secondary direct current loop of the transformer substation according to an electrified detection result, so that the accuracy and timeliness for solving the problem of the abnormal power quality of the power distribution network are effectively improved, and the power quality of the whole power distribution network is further improved.

In a first aspect, the present application provides a method for processing abnormal power quality of a power distribution network, where the method includes:

each transformer substation secondary direct current loop in at least one transformer substation secondary direct current loop with abnormal electric energy quality is electrified to be detected by a Hall sensor, wherein the Hall sensor comprises at least two Hall elements which are uniformly distributed in a magnetic ring of the Hall sensor;

and determining whether the corresponding secondary direct current loop of the transformer substation needs to be overhauled and maintained according to the charged detection result.

In a second aspect, the present application provides a device for processing abnormal power quality of a power distribution network, where the device includes:

The processing unit is used for carrying out live detection on each transformer substation secondary direct current loop in at least one transformer substation secondary direct current loop with abnormal electric energy quality by utilizing a Hall sensor, wherein the Hall sensor comprises at least two Hall elements which are uniformly distributed in a magnetic ring of the Hall sensor; and determining whether the corresponding secondary direct current loop of the transformer substation needs to be overhauled and maintained according to the charged detection result.

In a third aspect, the present application provides a server of a power distribution network system, the power distribution network system comprising the server, a plurality of substation secondary dc loops, a plurality of hall sensors, a warning module and a substation secondary dc loop three-dimensional simulation system server, the server being in communication with the plurality of hall sensors, the warning module and the substation secondary dc loop three-dimensional simulation system server, the server being adapted to perform the steps of the method according to any one of the first aspects.

In a fourth aspect, the present application provides a computer-readable storage medium storing a computer program or instructions which, when executed by a processor, implement the steps of the method of any of the first aspects.

It can be seen that in the embodiment of the application, a server firstly performs live detection by using a hall sensor aiming at each transformer substation secondary direct current circuit in at least one transformer substation secondary direct current circuit with abnormal electric energy quality, wherein the hall sensor comprises at least two hall elements, and the at least two hall elements are uniformly distributed in a magnetic ring of the hall sensor; and then determining whether the corresponding secondary direct current loop of the transformer substation needs to be overhauled and maintained according to the charged detection result, thereby effectively improving the accuracy and timeliness of solving the problem of abnormal power quality of the power distribution network and further improving the power quality of the whole power distribution network.

Drawings

In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a block diagram of a power distribution network system according to an embodiment of the present application;

Fig. 2 is a schematic structural diagram of a hall sensor according to an embodiment of the present application;

FIG. 3 is a schematic diagram of another Hall sensor according to an embodiment of the present application;

fig. 4 is a schematic flow chart of a method for processing abnormal power quality of a power distribution network according to an embodiment of the present application;

fig. 5 is a schematic page diagram of a three-dimensional simulation system of a secondary direct current loop of a transformer substation provided by an embodiment of the application;

Fig. 6 is a functional unit composition block diagram of a processing device for power quality abnormality of a power distribution network according to an embodiment of the present application;

Fig. 7 is a schematic structural diagram of a server according to an embodiment of the present application.

Detailed Description

In order that those skilled in the art will better understand the present application, a technical solution in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

The terms first, second and the like in the description and in the claims and in the above-described figures are used for distinguishing between different objects and not necessarily for describing a sequential or chronological order. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

In the embodiment of the application, "and/or" describes the association relation of the association objects, which means that three relations can exist. For example, a and/or B may represent three cases: a alone; both A and B are present; b alone. Wherein A, B may be singular or plural.

In the embodiment of the present application, the symbol "/" may indicate that the associated object is an or relationship. In addition, the symbol "/" may also denote a divisor, i.e. performing a division operation. For example, A/B may represent A divided by B.

"At least one" or the like in the embodiments of the present application means any combination of these items, including any combination of single item(s) or plural items(s), meaning one or more, and plural means two or more. For example, at least one (one) of a, b or c may represent the following seven cases: a, b, c, a and b, a and c, b and c, a, b and c. Wherein each of a, b, c may be an element or a set comprising one or more elements.

The 'equal' in the embodiment of the application can be used with the greater than the adopted technical scheme, can also be used with the lesser than the adopted technical scheme. When the combination is equal to or greater than the combination, the combination is not less than the combination; when the value is equal to or smaller than that used together, the value is not larger than that used together.

The electric energy is used as a secondary energy source which is economical, practical, clean, convenient and easy to control and convert, and has become an important foundation for the worldwide economic development and the people's life. With rapid development and wide application of power electronics technology, the problem of electric energy quality is increasingly prominent, and the problem of electric energy quality has increasingly serious influence on a power grid, power users and society. The electric energy quality refers to the quality of electric energy in an electric power system, and the improvement of the electric energy quality is significant for the safe and economic operation of a power grid, the guarantee of the quality of industrial products and the normal operation of scientific experiments, the reduction of energy consumption and the like. Therefore, when the power quality of the power distribution network is abnormal, the abnormality is timely, accurately and quickly solved and is important to the improvement of the power quality. The correctness of the secondary direct current loop of the transformer substation is related to whether the system tide can be faithfully reflected, whether the electric energy metering can be accurately recorded, and whether the electric energy quality assessment is accurate and reliable. For some hidden secondary direct current loop hidden dangers, such as two-point grounding, wiring errors and the like, the hidden secondary direct current loop hidden dangers can be easily ignored in secondary installation, routine maintenance and on-load inspection, and the hidden secondary direct current loop hidden dangers can influence power grid data after a power grid starts to operate, so that the evaluation of the power quality is affected. In the existing power quality abnormality detection scheme, detection is usually performed on a power distribution network power line, the scale and complexity of the power distribution network power line are high, the power distribution network power line detection cannot timely, accurately and rapidly solve the problem of power quality abnormality, and pertinence is lacking.

In order to solve the problems, the application provides a method and a related device for processing abnormal power quality of a power distribution network.

Referring to fig. 1, fig. 1 is a block diagram of a power distribution network system provided by an embodiment of the present application, as shown in fig. 1, the power distribution network system covers N regions (only region 1 is shown in the figure), each transformer substation in each region includes a plurality of transformer substation secondary dc circuits, each transformer substation secondary dc circuit is sleeved with a hall sensor, a server is in communication connection with each hall sensor, and the server is also in communication connection with a three-dimensional simulation system server and an alarm module of the transformer substation secondary dc circuit:

The Hall sensor is used for detecting the voltage of the secondary direct current loop of the transformer substation and sending the detected voltage value to the server.

Specifically, referring to fig. 2, fig. 2 is a schematic structural diagram of a hall sensor according to an embodiment of the present application, and as shown in fig. 2, the hall sensor includes a housing, a magnetic ring, and two hall elements. The whole magnet ring is of an annular structure and comprises a first magnet-saving ring 11 and a second magnet-saving ring 12, and the two Hall elements are respectively Hall elements 21 and 22 arranged between the first magnet-saving ring 11 and the second magnet-saving ring 12. The housing of the hall sensor is of an annular structure as a whole, and a magnetic ring, two hall elements 21 and 22, a controller and a power supply are disposed in the housing. The annular structure of the housing includes a first section housing 31 and a second section housing 32, and the two hall elements 21 and 22 are fixed in the first section housing 31 and the second section housing 32, respectively. The first joint 51 of the first section of housing 31 and the second joint of housing 32 are hinged, and the second joint 52 is clamped. After the second interface 52 is opened, the secondary direct current loop of the transformer substation enters the loop accommodation part 14 of the hall sensor from the second interface 52.

Referring to fig. 3, fig. 3 is a schematic structural diagram of another hall sensor according to an embodiment of the present application, and as shown in fig. 3, the hall sensor may include a housing, a magnetic ring, and three hall elements. The whole magnet ring is of an annular structure and comprises a first magnet-saving ring 11, a second magnet-saving ring 12 and a third magnet-saving ring 13, wherein three Hall elements are respectively Hall elements 21 arranged between the first magnet-saving ring 11 and the second magnet-saving ring 12, hall elements 22 arranged between the second magnet-saving ring 12 and the third magnet-saving ring 13 and Hall elements 23 arranged between the third magnet-saving ring 13 and the first magnet-saving ring 11. The housing of the hall sensor is of an annular structure as a whole, and a magnetic ring, three hall elements 21, 22 and 23, and a controller and a power supply are disposed in the housing. The annular structure of the housing includes a first section of housing 31 and a second section of housing 32. The first magnetic-saving ring 11 and the second magnetic-saving ring 12 are disposed in the second-saving housing 32, the third magnetic-saving ring 13 is disposed in the second-saving housing 32, and the three hall elements 21, 22, and 23 are fixed in the first-saving housing 31. The third magnetic ring 13 is disposed in the first housing 31. The first interface 51 between the first section of housing 31 and the second section of housing 32 is hinged, and the second interface 52 is clamped. After the second interface 52 is opened, the secondary direct current loop of the transformer substation enters the loop accommodation part 14 of the hall sensor from the second interface 52.

The server is used for receiving the voltage sent by each Hall sensor, processing and calculating the voltage to obtain a detection voltage value, judging that when the detection voltage value is larger than a voltage threshold value, sending warning information to the warning module, wherein the warning information comprises identification information of a corresponding secondary direct current loop of the transformer substation and the detection voltage value. The server is also used for synchronizing each detection voltage value and the corresponding secondary direct current loop of the transformer substation to the three-dimensional simulation system of the secondary direct current loop of the transformer substation.

The warning module is used for prompting the manager that the corresponding secondary direct current loop of the transformer substation is electrified by adopting proper modes such as alarm, message prompt and the like after receiving warning information from the server.

The three-dimensional simulation system of the secondary direct current loop of the transformer substation is used for visually displaying detection voltage values corresponding to the secondary direct current loops of the transformer substation in the three-dimensional simulation system.

Referring to fig. 4, fig. 4 is a flowchart of a method for processing abnormal power quality of a power distribution network according to an embodiment of the present application, as shown in fig. 4, the method is applied to a server of the power distribution network system, and the method specifically includes the following steps:

step 401, carrying out live detection by utilizing a Hall sensor for each transformer substation secondary direct current loop in at least one transformer substation secondary direct current loop with abnormal electric energy quality.

The hall sensor used in the application comprises at least two hall elements, as shown in fig. 2 and 3, wherein the at least two hall elements are uniformly distributed in a magnetic ring of the hall sensor.

And step 402, determining whether the corresponding secondary direct current loop of the transformer substation needs to be overhauled and maintained according to the charged detection result.

In one possible example, before each of the at least one substation secondary dc loop for which there is an abnormality in power quality is live detected with a hall sensor, the method further includes: collecting electricity consumption data of a plurality of areas, wherein the electricity consumption data comprises a loop identifier, and the loop identifier is used for uniquely identifying a secondary direct current loop of a transformer substation; judging the electric energy quality of the areas according to the electricity consumption data; detecting that an abnormality exists in the power quality of at least one region; and determining a transformer substation secondary direct current loop with abnormal electric energy quality according to the loop identification of each region in the at least one region.

The parameters affecting the quality of the electric energy may include a grid voltage qualification rate, a grid frequency qualification rate, a grid three-phase imbalance qualification rate, a grid flicker qualification rate, a grid harmonic qualification rate, an inter-grid harmonic qualification rate, and the like.

Specifically, the voltage yield= (1-voltage overrun time/total running statistics time) ×100%.

Frequency yield= (1-frequency overrun time/total running statistics time) 100%.

Three-phase voltage unbalance qualification rate= (1-three-phase voltage unbalance overrun time/total operation statistical time) ×100%.

Flicker qualification rate= (1-flicker overrun time/total running statistics time) 100%.

Harmonic pass = (1-harmonic overrun time/total running statistics time) ×100%.

Inter-harmonic pass ratio= (1-inter-harmonic overrun time/total running statistics time) ×100%.

The qualification rate of each area can be calculated according to the electricity consumption data of each area, and if part of the qualification rates do not reach the standard, the abnormality of the electric energy quality can be judged.

The power consumption data uploaded to the server all carry information such as position or identification, namely loop identification, so that the server can determine a relevant transformer substation secondary direct current loop from abnormal data.

The circuit identification of the transformer substation secondary direct current circuit can uniquely represent one transformer substation secondary direct current circuit, and can be distinguished from other transformer substation secondary direct current circuits in the power system and can be obtained through the circuit identification code of the transformer substation secondary direct current circuit. In practical situations, a line identifier, for example, a character string with a preset length including letters and numbers, may be provided on a cable corresponding to the secondary dc loop of the substation, which may include the substation identifier, a position indication in the substation, and the like. The loop identification corresponding to the line identification code can be generated by means of manual input or image acquisition and identification.

Under the condition of manual input, when a user performs live detection on a secondary direct current loop of the transformer substation, detection time and corresponding line identification codes are recorded, and then the corresponding line identification codes are input in a server according to the detection time in each piece of data.

Under the condition of image recognition, a user can adopt equipment with an image acquisition and recognition function to acquire an image on a secondary direct current loop of a transformer substation, the image contains a line identification code of the secondary direct current loop of the transformer substation, then the line identification code is extracted from the image, and the line identification code is sent to a server. The server generates a loop identification based on the line identification code.

Therefore, in the example, the server can accurately judge the identification information of the secondary direct current loop with abnormal electric energy from the electricity consumption data, and the timeliness of power grid overhaul and maintenance can be effectively improved.

In one possible example, the detecting the power of each of the at least one secondary dc loop of the transformer substation with the abnormal power quality by using the hall sensor includes: sending an electrified detection instruction to a Hall sensor corresponding to the secondary direct current loop of each transformer substation; receiving detection data from each hall sensor, wherein single detection data comprises a plurality of voltage values and the loop identification;

the following is performed for each detection data: calculating according to the voltage values to obtain a detection voltage value; establishing an association relationship between the detection voltage value and the loop identifier; and determining the result of the electrified detection according to the magnitude relation between the detection voltage value and the voltage threshold value.

The secondary direct current loops of the transformer substation are generally distributed side by side, influence interference among the secondary direct current loops of the transformer substation is large, the influence interference of the secondary direct current loops of the transformer substation in live detection can be reduced through detecting voltages of at least two Hall elements in the Hall sensor, and the live detection precision is improved.

Since the secondary dc circuits of a transformer substation are usually multiple and arranged side by side, when a secondary dc circuit of a transformer substation is electrically detected, other secondary dc circuits of the transformer substation, which are positioned near the secondary dc circuit of the transformer substation and are electrically charged, will interfere with the electrically detecting of the secondary dc circuit of the transformer substation. To reduce the influence interference of the secondary dc loop of the other live substation, a shield can may be provided for each hall element of the hall sensor to reduce the influence interference of the secondary dc loop of the other live substation as much as possible.

Therefore, as shown in fig. 2 and 3, the hall sensor used in the application comprises at least two hall elements, the hall elements are uniformly distributed in a magnetic ring of the hall sensor, the hall sensor measures at least two voltage values of a secondary direct current loop of a transformer substation through the hall elements, and the at least two voltage values and corresponding loop identifications are sent to a server. And the server determines the detection voltage value of the secondary direct current loop of the transformer substation according to the voltage value and the distribution condition of the Hall elements in the magnetic ring.

The Hall sensor can be sleeved on a cable corresponding to a secondary direct current loop of a certain transformer substation, and the secondary direct current loop of the transformer substation is detected in an electrified mode; and after the live detection of the secondary direct current loop of the transformer substation is completed, carrying out live detection on the secondary direct current loop of the next transformer substation until the live detection of part or all of the secondary direct current loops of the transformer substation is completed. Or a Hall sensor can be arranged for each secondary direct current loop of the transformer substation to detect the secondary direct current loop of the transformer substation in real time.

The association relationship between the detection voltage value and the loop identifier is established, and the association relationship may be specifically represented as the following table, as shown in table 1:

table 1 shows the correlation between the detected voltage value and the loop identification

Voltage detection value	Loop identification
		V₁	S1
V₂	S2
		……	……
V_N	S_N

Wherein V ₁、V₂、……、V_N is a voltage detection value, S1, S2, … …, S _N are loop identifications of the secondary dc loop of the transformer substation corresponding to V ₁、V₂、……、V_N, and S1, S2, … …, S _N can be set according to specific industry standards.

The voltage threshold is a maximum value of a preset secondary direct current loop of the transformer substation, and can be set according to actual requirements of a power distribution network system.

The live detection result is mainly used for determining whether overhauling and maintenance are needed to be carried out on the secondary direct current loop of the transformer substation.

Therefore, in this example, when the dc loop is electrically detected, since the secondary dc loops of the transformer substation are generally distributed side by side, the influence interference between the secondary dc loops of the transformer substation is large, and the influence interference of the secondary dc loops of the transformer substation in the live detection by the other live transformer substation can be reduced by detecting the voltage by the plurality of hall elements, so as to improve the precision of the live detection. In addition, the shielding device is arranged for each Hall element, so that the accuracy of live detection can be further improved.

In one possible example, the calculating the detected voltage value from the plurality of voltage values includes: and averaging the voltage values, wherein the single voltage value is equal to the sum of a magnetic field generated by a secondary direct current path of the transformer substation and detected by the current Hall sensor and an interference magnetic field measured by the current Hall element, and the conversion coefficient is determined by the material of the Hall element.

The specific steps of averaging the voltage values are as follows: the voltage values detected by the Hall elements are V ₁、V₂、……、V_N respectively, and vector average is carried out on the voltage values to obtain the detection voltage (V ₁+V₂+……+V_N)/N of the secondary direct current loop of the transformer substation. Wherein ,V₁＝A×(H₁+H₂₁),V₂＝A×(H₁+H₂₂),V_N＝A×(H₁+H_2N),H₁ is a magnetic field generated by a detected transformer substation secondary direct current loop, H ₂₁ is an interference magnetic field measured by a1 st Hall element, H ₂₂ is an interference magnetic field measured by a2 nd Hall element, H _2N is an interference magnetic field measured by an N-th Hall element, a magnetic flux surface of each Hall element is parallel to the radial direction of a magnetic ring at the position, A is a conversion coefficient, and the conversion coefficient is determined by the material of the Hall element.

In one possible example, the determining whether the corresponding secondary dc loop of the substation needs to be overhauled according to the result of the live detection includes: detecting that the detected voltage value is greater than the voltage threshold; and determining the secondary direct current loop of the transformer substation corresponding to the detection voltage value as a direct current loop which needs to be overhauled and maintained according to the association relation.

If the detected voltage value is greater than the voltage threshold value, overhauling and maintaining the secondary direct current loop of the transformer substation corresponding to the detected voltage value according to the association relation.

If the detected voltage value is smaller than or equal to the voltage threshold value, overhauling and maintenance are not needed for the secondary direct current loop of the transformer substation corresponding to the detected voltage value according to the association relation.

In this example, the magnitude relation between the voltage value and the voltage threshold value is detected, and then the secondary direct current loop of the transformer substation, which needs to be overhauled and maintained, can be rapidly determined according to the association relation.

In one possible example, after the detecting that the detected voltage value is greater than the voltage threshold, the method further includes: and sending an alarm instruction to an alarm module of the power distribution network, wherein the alarm instruction is used for prompting the voltage limitation of a secondary direct current loop of the transformer substation corresponding to the detection voltage value.

The secondary direct current loop of the transformer substation penetrates into the Hall sensor to detect the voltage of the secondary direct current loop of the transformer substation, and the secondary direct current loop of the transformer substation is warned through the warning module when the detected voltage is larger than a voltage threshold value, so that the live detection of the secondary direct current loop of the transformer substation and the voltage detection of the secondary direct current loop of the transformer substation can be realized.

Therefore, in the example, the charged detection result is initially displayed through the warning module, so that an operator can conveniently and quickly and intuitively know the charged condition of the direct current loop.

In one possible example, after the association between the detected voltage value and the loop identifier is established, the method further includes: and sending the association relation to a three-dimensional simulation system server of the secondary direct current loop of the transformer substation so that the detection voltage value of the secondary direct current loop of each transformer substation is visually displayed in the three-dimensional simulation system of the secondary direct current loop of the transformer substation.

The method comprises the steps that a server obtains detection voltages and loop identifications of secondary direct current loops of all transformer substations, establishes association relations between the detection voltages and the loop identifications, and displays the voltages of the secondary direct current loops of all the transformer substations in a three-dimensional simulation system of the secondary direct current loops of the transformer substations according to the association relations. For example, when the voltage of a secondary dc loop of a certain transformer substation is greater than a voltage threshold, a prompt message is generated, and the prompt message may be that the display color of the secondary dc loop of the transformer substation changes to red. Through the simulation system, a user can systematically monitor the voltage of the secondary direct current loop of each transformer substation, and intuitively know the voltage condition of the secondary direct current loop of each transformer substation.

It should be noted that the prompt information may also include other forms, which are not limited only herein.

The three-dimensional simulation system stores the association relation received each time, and a user can apply an operation to a secondary direct current loop of a certain transformer substation in a display interface of the simulation system, so that historical information of the secondary direct current loop of the transformer substation can be checked. Or a user can apply operations to some secondary DC loops of the transformer substation in a display interface of the simulation system to check the history information of the secondary DC loops of the transformer substation.

Referring to fig. 5, fig. 5 is a schematic diagram of a three-dimensional simulation system of a secondary dc loop of a transformer substation provided by an embodiment of the present application, as shown in fig. 5, a user selects a designated area in an interface 1 and then enters an interface 2, the interface 2 is all secondary dc loops of the transformer substation in the area, including secondary dc loops S1, S2, … …, S8, … …, wherein S2 and S6 are secondary dc loops with detection voltage values exceeding a voltage threshold, the bottom of the interface 2 further includes two virtual buttons "query current voltage", "query history voltage", when the user selects any secondary dc loop in the secondary dc loops, such as a checkbox of the user checkbox S2, then enters an interface 3 (not shown in the figure), the interface 3 is a current detection voltage value of the secondary dc loop S2, and then enters an interface 4, the interface 4 includes all detection voltage values when the secondary dc loops S2 are electrified, including detection time, detection voltage values, and the like, and the maintenance of the secondary dc loops can be accelerated by comparing the detection voltage values; when a user selects a plurality of or all secondary direct current loops, such as S1-S ₈, clicking "inquiring the current voltage", entering an interface 5, wherein the interface 5 is the current voltage data of the secondary direct current loops S1-S ₈ of the transformer substation, including loop identifiers and corresponding check voltage values, clicking "inquiring historical voltage", and calling the historical voltage data of all secondary direct current loops of the transformer substation, so as to generate a web page (not shown in the figure), and displaying the historical voltage data of all secondary direct current loops of the transformer substation in the web page.

Therefore, in the example, the voltage conditions of all loops are displayed in the three-dimensional simulation system of the secondary direct current loop of the transformer substation, so that voltage distribution can be intuitively known, abnormal conditions can be found, the operation of the power grid can be optimized, auxiliary references are provided for decision making and planning, and the efficiency and quality of power grid management and operation and maintenance can be improved. It can be seen that in the embodiment of the application, a server firstly performs live detection by using a hall sensor aiming at each transformer substation secondary direct current circuit in at least one transformer substation secondary direct current circuit with abnormal electric energy quality, wherein the hall sensor comprises at least two hall elements, and the at least two hall elements are uniformly distributed in a magnetic ring of the hall sensor; and then determining whether the corresponding secondary direct current loop of the transformer substation needs to be overhauled and maintained according to the charged detection result, thereby effectively improving the accuracy and timeliness of solving the problem of abnormal power quality of the power distribution network and further improving the power quality of the whole power distribution network.

The foregoing description of the embodiments of the present application has been presented primarily in terms of a method-side implementation. It will be appreciated that the server, in order to implement the above-described functions, includes corresponding hardware structures and/or software modules that perform the respective functions. Those of skill in the art will readily appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is implemented as hardware or computer software driven hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

The embodiment of the application can divide the functional units of the server according to the method example. For example, each functional unit may be divided corresponding to each function, or two or more functions may be integrated in one processing unit. The integrated units described above may be implemented either in hardware or in software program modules. It should be noted that, in the embodiment of the present application, the division of the units is schematic, but only one logic function is divided, and another division manner may be adopted in actual implementation.

In the case of adopting integrated units, referring to fig. 6, fig. 6 is a functional unit composition block diagram of a processing device for power quality abnormality of a power distribution network according to an embodiment of the present application. The processing means 6 comprise a processing unit.

The processing unit may be a module unit for processing data or the like.

Optionally, the processing device 6 further comprises a receiving unit, which may be a modular unit for acquiring data or the like.

Optionally, the processing device 6 further comprises a transmitting unit, which may be a modular unit for transmitting data.

Optionally, the processing means 6 further comprises a storage unit for storing computer program code or instructions for execution by the processing means 6. For example, the memory unit may be a memory.

It should be noted that the processing unit may be a processor or a controller, for example, a central processing unit (central processing unit, CPU), a general purpose processor, a digital signal processor (DIGITAL SIGNAL processor, DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (field programmable GATE ARRAY, FPGA), or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Which may implement or perform the various exemplary logical blocks, modules, and circuits described in connection with the present disclosure. The processing unit may also be a combination that implements computing functionality, e.g., comprising one or more microprocessor combinations, a combination of DSPs and microprocessors, etc.

Alternatively, the processing means 6 may be a chip or a chip module.

In particular, the processing means 6 are adapted to perform the steps performed by the chip/chip module/server or the like in the above-described method embodiments.

In one possible example, the processing unit is further configured to, before each of the at least one substation secondary dc loop having an abnormality in power quality is electrically detected with the hall sensor: collecting electricity consumption data of a plurality of areas, wherein the electricity consumption data comprises a loop identifier, and the loop identifier is used for uniquely identifying a secondary direct current loop of a transformer substation; judging the electric energy quality of the areas according to the electricity consumption data; detecting that an abnormality exists in the power quality of at least one region; and determining a transformer substation secondary direct current loop with abnormal electric energy quality according to the loop identification of each region in the at least one region.

In one possible example, in terms of live detection by a hall sensor of each of the at least one substation secondary dc circuit for which there is an abnormality in power quality, the transmitting unit is configured to: sending an electrified detection instruction to a Hall sensor corresponding to the secondary direct current loop of each transformer substation;

The receiving unit is used for receiving detection data from each Hall sensor, and single detection data comprise a plurality of voltage values and the loop identification;

In performing for each detection data, the processing unit is further configured to: calculating according to the voltage values to obtain a detection voltage value; establishing an association relationship between the detection voltage value and the loop identifier; and determining the result of the electrified detection according to the magnitude relation between the detection voltage value and the voltage threshold value.

In one possible example, in terms of the calculating a detected voltage value from the plurality of voltage values, the processing unit is further configured to: and averaging the voltage values, wherein the single voltage value is equal to the sum of a magnetic field generated by a secondary direct current path of the transformer substation and detected by the current Hall sensor and an interference magnetic field measured by the current Hall element, and the conversion coefficient is determined by the material of the Hall element.

In one possible example, in the aspect of determining whether the corresponding substation secondary dc circuit needs to be overhauled or not according to the result of the live detection, the processing unit is further configured to: detecting that the detected voltage value is greater than the voltage threshold; and determining the secondary direct current loop of the transformer substation corresponding to the detection voltage value as a direct current loop which needs to be overhauled and maintained according to the association relation.

In one possible example, after the processing unit detects that the detected voltage value is greater than the voltage threshold, the transmitting unit is further configured to: and sending an alarm instruction to an alarm module of the power distribution network, wherein the alarm instruction is used for prompting the voltage limitation of a secondary direct current loop of the transformer substation corresponding to the detection voltage value.

In one possible example, after the processing unit establishes the association relationship between the detected voltage value and the loop identifier, the sending unit is further configured to: and sending the association relation to a three-dimensional simulation system server of the secondary direct current loop of the transformer substation so that the detection voltage value of the secondary direct current loop of each transformer substation is visually displayed in the three-dimensional simulation system of the secondary direct current loop of the transformer substation.

Referring to fig. 7, fig. 7 is a schematic structural diagram of a server according to an embodiment of the present application. The server 700 includes a processor 710, a memory 720, and a communication bus for connecting the processor 710 and the memory 720.

Optionally, memory 720 includes, but is not limited to RAM, ROM, EPROM or CD-ROM, which memory 720 is used to store related instructions and data.

Optionally, the server 700 also includes a communication interface for receiving and transmitting data.

Alternatively, the processor 710 may be one or more Central Processing Units (CPUs), and in the case that the processor 710 is one Central Processing Unit (CPU), the Central Processing Unit (CPU) may be a single-core Central Processing Unit (CPU) or a multi-core Central Processing Unit (CPU).

Alternatively, the processor 710 may be a baseband chip, a Central Processing Unit (CPU), a general purpose processor, DSP, ASIC, FPGA or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof.

The processor 710 in the server 700 is configured to execute computer programs or instructions 721 stored in the memory 720.

It should be noted that, the specific implementation of each operation may be described in the foregoing method embodiment, and the server 700 may be used to execute the method on the terminal device side in the foregoing method embodiment of the present application, which is not described herein in detail.

Embodiments of the present application provide a computer readable storage medium having stored thereon a computer program/instructions which when executed by a processor realizes the steps of the method of any of the possible embodiments.

It should be understood that, in various embodiments of the present application, the sequence numbers of the foregoing processes do not mean the order of execution, and the order of execution of the processes should be determined by the functions and internal logic thereof, and should not constitute any limitation on the implementation process of the embodiments of the present application.

In the several embodiments provided in the present application, it should be understood that the disclosed method, apparatus and system may be implemented in other manners. For example, the device embodiments described above are merely illustrative; for example, the division of the unit is just one logic function division, and there may be another division manner when actually implementing the unit; for example, multiple units or components may be combined or may be integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in the embodiments of the present application may be integrated in one processing module, or each unit may be physically included separately, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in hardware plus software functional units.

The integrated units implemented in the form of software functional units described above may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium, and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: u disk, removable hard disk, magnetic disk, optical disk, volatile memory or nonvolatile memory. The nonvolatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an erasable programmable ROM (erasable PROM), an electrically erasable programmable EPROM (EEPROM), or a flash memory. The volatile memory may be random access memory (random access memory, RAM) which acts as external cache memory. By way of example, and not limitation, many forms of random access memory (random access memory, RAM) are available, such as static random access memory (STATIC RAM, SRAM), dynamic Random Access Memory (DRAM), synchronous Dynamic Random Access Memory (SDRAM), double data rate synchronous dynamic random access memory (doubledata RATE SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (ENHANCED SDRAM, ESDRAM), synchronous link dynamic random access memory (SYNCHLINK DRAM, SLDRAM), and direct memory bus random access memory (direct rambus RAM, DR RAM) among the various media in which program code may be stored.

Although the present application is disclosed above, the present application is not limited thereto. Variations and modifications, including combinations of the different functions and implementation steps, as well as embodiments of the software and hardware, may be readily apparent to those skilled in the art without departing from the spirit and scope of the application.

Claims

1. A method for processing power quality anomalies in a power distribution network, the method comprising:

2. The method of claim 1, wherein each of the at least one substation secondary dc loop for which there is an anomaly in power quality is further comprised of, prior to live detection with the hall sensor:

Collecting electricity consumption data of a plurality of areas, wherein the electricity consumption data comprises a loop identifier, and the loop identifier is used for uniquely identifying a secondary direct current loop of a transformer substation;

judging the electric energy quality of the areas according to the electricity consumption data;

detecting that an abnormality exists in the power quality of at least one region;

and determining a transformer substation secondary direct current loop with abnormal electric energy quality according to the loop identification of each region in the at least one region.

3. The method of claim 2, wherein each of the at least one substation secondary dc loop for which there is an anomaly in power quality is electrically detected using a hall sensor comprising:

Sending an electrified detection instruction to a Hall sensor corresponding to the secondary direct current loop of each transformer substation;

receiving detection data from each hall sensor, wherein single detection data comprises a plurality of voltage values and the loop identification;

the following is performed for each detection data:

calculating according to the voltage values to obtain a detection voltage value;

establishing an association relationship between the detection voltage value and the loop identifier;

and determining the result of the electrified detection according to the magnitude relation between the detection voltage value and the voltage threshold value.

4. A method according to claim 3, wherein said calculating a detected voltage value from said plurality of voltage values comprises:

And averaging the voltage values, wherein the single voltage value is equal to the sum of a magnetic field generated by a secondary direct current path of the transformer substation and detected by the current Hall sensor and an interference magnetic field measured by the current Hall element, and the conversion coefficient is determined by the material of the Hall element.

5. A method according to claim 3, wherein the determining whether the corresponding secondary dc loop of the substation needs to be overhauled according to the result of the live detection comprises:

Detecting that the detected voltage value is greater than the voltage threshold;

and determining the secondary direct current loop of the transformer substation corresponding to the detection voltage value as a direct current loop which needs to be overhauled and maintained according to the association relation.

6. The method of claim 5, wherein after the detecting that the detected voltage value is greater than the voltage threshold, the method further comprises:

And sending an alarm instruction to an alarm module of the power distribution network, wherein the alarm instruction is used for prompting the voltage limitation of a secondary direct current loop of the transformer substation corresponding to the detection voltage value.

7. The method of claim 5, wherein after the establishing the association between the detected voltage value and the loop identification, the method further comprises:

and sending the association relation to a three-dimensional simulation system server of the secondary direct current loop of the transformer substation so that the detection voltage value of the secondary direct current loop of each transformer substation is visually displayed in the three-dimensional simulation system of the secondary direct current loop of the transformer substation.

8. A device for processing abnormal power quality of a power distribution network, the device comprising:

9. A server of a power distribution network system, characterized in that the power distribution network system comprises the server, a plurality of substation secondary dc-loops, a plurality of hall sensors, a warning module and a substation secondary dc-loop three-dimensional simulation system server, the server being in communication with the plurality of hall sensors, the warning module and the substation secondary dc-loop three-dimensional simulation system server, the server being adapted to perform the steps in the method according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that it has stored thereon a computer program or instructions which, when executed by a processor, implement the steps of the method according to any of the preceding claims 1 to 7.