WO2019006961A1

WO2019006961A1 - Method and apparatus for monitoring abnormal voltage in power system

Info

Publication number: WO2019006961A1
Application number: PCT/CN2017/112652
Authority: WO
Inventors: 王贺萍; 王文忠; 张强; 贾慧云; 赵云龙; 刘兴生; 秦猛; 路豪杰
Original assignee: 许昌许继昌龙电能科技股份有限公司
Priority date: 2017-07-05
Filing date: 2017-11-23
Publication date: 2019-01-10
Also published as: CN107359609A; CN107359609B

Abstract

Disclosed are a method and apparatus for monitoring an abnormal voltage in a power system, relating to the field of power systems, and mainly aimed to solve the problems that since the effects of different filters and compensators on suppressing a sudden rise and a sudden drop in a voltage are different, and requirements for a voltage in a power system during different types of production processes are also different, short-time power failure, and a rise or a drop in a voltage still occurs, and phenomena, such as the interruption of power supply and burnout of a device due to overheating, still occur in the long run. The method comprises receiving voltage data sent by voltage monitoring devices located in different monitoring locations according to a first pre-set time interval (101); determining whether the voltage data matches a pre-set abnormal voltage (102); if so, extracting an abnormal voltage suppression rule corresponding to a change in the voltage data (103); and according to the abnormal voltage suppression rule, starting an abnormal voltage suppression device corresponding to the monitoring location of the voltage data (104).

Description

Method and device for monitoring abnormal voltage in power system

Technical field

The present invention relates to the field of power systems, and in particular, to a method and apparatus for monitoring abnormal voltages in a power system.

Background technique

With the full popularity of automation in industrial production processes, whether the power system in the factory is functioning properly has gradually become the focus of manufacturers. Short-term power outages, voltage surges or sudden drops caused by the power system during the production process may cause unnecessary power interruptions and equipment overheating in some special industrial production processes, causing burnout of circuits and components.

At present, short-term power outages, voltage surges or sudden drops in power systems are caused by harmonics, voltage fluctuations, flicker or three-phase imbalances. The existing suppression methods are only series harmonics. Wave filter and compensator, because different filters and compensators have different effects in suppressing the sudden rise and fall of voltage, and the requirements of power system voltage are different in different types of production processes, there will still be short-term power outages. The voltage rises or falls, and in the long run, there will still be power interruption, equipment overheating and burning.

Summary of the invention

In view of the above problems, the present invention has been made in order to provide a method and apparatus for monitoring an abnormal voltage in a power system, the main purpose of which is to solve the different effects of different filters and compensators in suppressing sudden rise and fall of voltage, and different types. In the production process, the voltage requirements of the power system are also different. There will still be short-term power outages, voltage rises or decreases. In the long run, there will still be problems such as power interruption, equipment overheating and burning.

According to the above technical solution, the method for monitoring abnormal voltage in a power system provided by the present invention includes:

Receiving, by the first preset time interval, voltage data sent by the voltage monitoring device located at different monitoring positions, where the different monitoring positions are positions in the power system where the abnormal voltage number exceeds the preset voltage threshold;

Determining whether the voltage data matches a preset abnormal voltage, which is a maximum value and/or a minimum value of a power system carrying voltage increase and/or decrease, and an abnormal change voltage;

If matched, extracting an abnormal voltage suppression rule corresponding to the change of the voltage data, the abnormal voltage suppression rule for adjusting the abnormal voltage to a normal voltage;

And starting an abnormal voltage suppression device corresponding to the monitoring position of the voltage data according to the abnormal voltage suppression rule, the abnormal voltage suppression device comprising one of a compensator, a capacitor, a filter, or a series connection between the plurality, and / or parallel combination.

Further, determining whether the voltage data matches a preset abnormal voltage includes:

Determining the type of industry to which the current power system belongs and the type of equipment to be monitored;

Determining whether the voltage data is greater than or equal to a preset voltage maximum value corresponding to the industrial type and the device type, and/or determining whether the voltage data is less than or equal to the industrial type and the device type The preset voltage minimum.

Further, if the matching is performed, extracting an abnormal voltage suppression rule corresponding to the change of the voltage data includes:

If the voltage data is greater than or equal to a preset voltage maximum value corresponding to the industrial type and device type, and/or the voltage data is less than or equal to a minimum preset voltage corresponding to the industrial type and the device type a value, determining a change in the voltage data;

Selecting an abnormal voltage suppression rule corresponding to the change situation and the industrial type and device type

Further, the abnormal voltage suppression rule includes series, and/or parallel rules corresponding to different industrial types, different device types, and different voltage data variations.

Further, the voltage data sent by the voltage monitoring device located at different monitoring positions is received according to the second preset time interval, where the second preset time interval is greater than the first preset time interval;

Determining whether the voltage data matches a preset abnormal voltage;

If yes, it is determined that the current power system is abnormal, and the alarm information is sent, where the alarm information includes the monitoring position and the voltage data.

With the above technical solution, the present invention provides an abnormal voltage monitoring device for a power system, including:

a first receiving unit, configured to receive, according to a first preset time interval, voltage data sent by a voltage monitoring device located at different monitoring positions, where the different monitoring position is a position in the power system where the abnormal voltage number exceeds a preset voltage threshold;

a first determining unit, configured to determine whether the voltage data matches a preset abnormal voltage, where the abnormal voltage is a maximum value and/or a minimum value of a power system carrying voltage increase and/or decrease, and an abnormal change voltage;

And an extracting unit, configured to extract an abnormal voltage suppression rule corresponding to a change of the voltage data, wherein the abnormal voltage suppression rule is used to adjust the abnormal voltage to a normal voltage;

a startup unit, configured to start an abnormal voltage suppression device corresponding to the monitoring position of the voltage data according to the abnormal voltage suppression rule, where the abnormal voltage suppression device includes one of a compensator, a capacitor, and a filter, or multiple Series, and/or parallel combinations.

Further, the determining unit includes:

a first determining module, configured to determine an industrial type to which the current power system belongs and a device type to be monitored;

a determining module, configured to determine whether the voltage data is greater than or equal to a preset voltage maximum value corresponding to the industrial type and the device type, and/or determine whether the voltage data is less than or equal to the industrial type and The preset voltage minimum corresponding to the device type.

Further, the extracting unit includes:

a second determining module, configured to: if the voltage data is greater than or equal to a preset voltage maximum value corresponding to the industrial type and device type, and/or the voltage data is less than or equal to the industrial type and the device Determining a minimum value of the preset voltage corresponding to the type, determining a change in the voltage data;

The selection module is configured to select an abnormal voltage suppression rule corresponding to the change situation and the industrial type and device type.

Further, the device further includes:

The second receiving unit is configured to receive, according to the second preset time interval, voltage data sent by the voltage monitoring device located at different monitoring positions, where the second preset time interval is greater than the first preset time interval;

a second determining unit, configured to determine whether the voltage data matches a preset abnormal voltage;

The determining unit is configured to: if yes, determine that the current power system is abnormal, and send alarm information, where the alarm information includes a monitoring location and the voltage data.

The method and device for monitoring an abnormal voltage in a power system according to an embodiment of the present invention firstly receive voltage data sent by a voltage monitoring device located at different monitoring positions according to a first preset time interval, where the different monitoring positions are power systems. A position in which the abnormal voltage number exceeds a preset voltage threshold occurs, and then it is determined whether the voltage data matches a preset abnormal voltage, which is a maximum value and/or a minimum of the power system carrying voltage increase and/or decrease. a value, and an abnormal change voltage, if matched, extracting an abnormal voltage suppression rule corresponding to a change in the voltage data, the abnormal voltage suppression rule being used to adjust the abnormal voltage to a normal voltage, and finally suppressing according to the abnormal voltage The rule initiates an abnormal voltage suppression device corresponding to the monitored position of the voltage data, the abnormal voltage suppression device comprising one of a compensator, a capacitor, a filter, or a series, and/or parallel combination between the plurality. Compared with the existing series harmonic filter and the compensator to suppress the voltage sudden change, the embodiment of the present invention determines whether the voltage data of the received monitoring position meets the preset abnormal voltage, and if so, extracts according to the change of the voltage data. According to this rule, the abnormal voltage suppression device is activated, and the abnormal voltage suppression device corresponding to the voltage data is activated to reduce or increase the voltage in time before the sudden change of the voltage, thereby reducing the occurrence of short-term power failure, voltage swell or sudden drop. In case, it is possible to remediate when the voltage reaches dangerous voltage value, so as to avoid power interruption, equipment overheating and burning.

The above description is only an overview of the technical solutions of the present invention, and the above-described and other objects, features and advantages of the present invention can be more clearly understood. Specific embodiments of the invention are set forth below.

DRAWINGS

Various other advantages and benefits will become apparent to those skilled in the art from a The drawings are only for the purpose of illustrating the preferred embodiments and are not to be construed as limiting. Throughout the drawings, the same reference numerals are used to refer to the same parts. In the drawing:

FIG. 1 is a flowchart of a method for monitoring abnormal voltage in a power system according to an embodiment of the present invention;

2 is a flowchart of another method for monitoring abnormal voltage in a power system according to an embodiment of the present invention;

3 is a block diagram showing an apparatus for monitoring an abnormal voltage in a power system according to an embodiment of the present invention;

FIG. 4 is a block diagram showing another apparatus for monitoring abnormal voltage in a power system according to an embodiment of the present invention.

Detailed ways

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While the embodiments of the present invention have been shown in the drawings, the embodiments Rather, these embodiments are provided so that this disclosure will be more fully understood and the scope of the disclosure will be fully disclosed.

An embodiment of the present invention provides a method for monitoring an abnormal voltage in a power system. As shown in FIG. 1 , the method includes:

101. Receive voltage data sent by a voltage monitoring device at different monitoring positions according to a first preset time interval.

The different monitoring position is a position in the power system where the abnormal voltage number exceeds a preset voltage threshold, the first preset time interval is a time interval of receiving voltage data, and the voltage data is a first preset time interval. All the values of the internal voltage value change with time, the voltage monitoring device is used for detecting and recording the voltage data, and the monitoring position is specifically pre-selected to determine that a voltage swell, a sudden drop, and a power failure occur at certain positions in the power system. The position, the number of abnormal voltages in these positions exceeds the preset voltage threshold, such as more than 2 times or more than 3 times, the preset voltage preset is a set of maximum and minimum values that the circuit can withstand in the power system, the specific value The embodiment of the invention is not specifically limited.

It should be noted that when recording voltage data, it is necessary to record the voltage change, such as frequency deviation, voltage deviation, voltage fluctuation and flicker, three-phase unbalance, transient or transient over-voltage, waveform distortion (harmonic Wave), voltage sag, interruption, spurt, and supply voltage continuity, etc., in order to judge whether it is an abnormal voltage by these conditions. In addition, the executor of the current receiving voltage data may be a server configured on the control end of the power system, which is not specifically limited in the embodiment of the present invention.

102. Determine whether the voltage data matches a preset abnormal voltage.

Wherein the abnormal voltage is a maximum value and/or a minimum value of an increase and/or a decrease in a load voltage of the power system, and an abnormal change voltage, wherein the maximum value and the minimum value of the load voltage are based on a specific use of the current power system and The load condition corresponding to the electrical energy is configured, and the specific value is not specifically limited in the embodiment of the present invention. The abnormal change voltage may include frequency deviation, voltage deviation, voltage fluctuation and flicker, three-phase unbalance, transient or transient overvoltage, waveform distortion (harmonic), voltage sag, interruption, sag, and supply voltage Continuity and the like, and the maximum value of the voltage swell and the minimum value of the voltage sag can be set according to different requirements of different power systems, which are not specifically limited in the embodiment of the present invention.

It should be noted that the power system in different industries and factories has different settings for abnormal voltages, and the maximum and minimum voltages that can be carried are also different. Therefore, technicians need to Set the details.

103. If matched, extract an abnormal voltage suppression rule corresponding to the change of the voltage data.

The abnormal voltage suppression rule is used to adjust the abnormal voltage to a normal voltage, and the change of the voltage data is a specific situation in which an abnormal voltage appears in a certain time, for example, the number of harmonics occurring, the magnitude of the harmonic , or the fluctuation of the voltage fluctuation, the number of flickers, and so on.

It should be noted that the abnormal voltage suppression rule may be a strategy for combining abnormal voltage suppression devices, thereby achieving the purpose of adjusting the abnormal voltage to a normal voltage. For example, a series-parallel strategy between a filter and a capacitor.

For the embodiment of the present invention, the step parallel to step 103 is: if the voltage data does not match the preset abnormal voltage, then return to step 101.

104. Start an abnormal voltage suppression device corresponding to the monitoring position of the voltage data according to the abnormal voltage suppression rule.

Wherein, the abnormal voltage suppression device comprises one of a compensator, a capacitor, a filter, or a series, and/or a parallel combination between the plurality, and the specific combination may be determined according to an object to be monitored.

It should be noted that because different voltage dips or swells may have different effects on different devices, the monitoring position may be configured at a position where the voltage data device or circuit needs to be monitored, for example, for a cooling electronic controller. When the voltage is 0.8Ue, the controller will cut off the cooling motor, resulting in huge economic loss. Therefore, it is necessary to configure a voltage sensor and an abnormal voltage suppression device near the refrigeration electronic controller.

The method for monitoring an abnormal voltage in a power system according to an embodiment of the present invention compares the voltage data of the received monitoring position by the embodiment of the present invention compared with the prior art that only the series harmonic filter and the compensator suppress the voltage sudden change. Whether it meets the preset abnormal voltage, if yes, extracts the abnormal voltage suppression rule according to the change of the voltage data, and starts the abnormal voltage suppression device corresponding to the voltage data according to this rule, thereby realizing the lowering or raising in time before the voltage suddenly changes. The voltage reduces the occurrence of short-term power outages, voltage surges or sudden drops, and timely remediation when the voltage reaches dangerous voltage values, thereby avoiding power interruption, equipment overheating and burning.

Another embodiment of the present invention provides a method for monitoring abnormal voltage in a power system. As shown in FIG. 2, the method includes:

201. Receive voltage data sent by a voltage monitoring device at different monitoring positions according to a first preset time interval.

This step is the same as the method in step 101 shown in FIG. 1, and details are not described herein again.

202. Determine an industrial type to which the current power system belongs and a device type to be monitored.

Among them, the industrial types include wind power, photovoltaic, etc. in metallurgical industry, chemical coal, railway traction and new energy. For different industrial types and factory configurations, the voltages that can be carried in the power system are also different, for example, for miners. Power systems use high-voltage, high-voltage electricity, and a company's power system for electronic equipment needs weak electricity. The device for monitoring the corresponding device type is a device that uses electricity in a power system, and is generally divided into a high voltage or a low voltage, a direct current, or an alternating current, which is not specifically limited in the embodiment of the present invention. For example, in a DC motor, when the voltage is lower than 80% Ue, the DC motor is tripped, and the loss level is up to 10,000 US dollars each time; and a programmable controller PLC, when electricity When the pressure is lower than 10% Ue, it can still work for 15 cycles. When the voltage is lower than 50% Ue, the PLC stops working. Compared with PLC, the rated voltage of DC motor is much larger than the rated voltage of PLC.

It should be noted that in order to accurately monitor the voltage change of the object to be monitored and the suppression rule of the abnormal voltage, it is necessary to clearly determine the type of the industrial system to which the current power system belongs and the type of the device to be monitored, thereby ensuring that the voltage change does not affect the device. cause some damages.

203. Determine whether the voltage data is greater than or equal to a preset voltage maximum value corresponding to the industrial type and the device type, and/or determine whether the voltage data is less than or equal to the industrial type and the device. The preset minimum voltage corresponding to the type.

The maximum value of the preset voltage is the maximum value of the voltage change that can be carried in the power system. The specific value is set according to the technical personnel, and is not specifically limited in the embodiment of the present invention. For example, the obtained voltage data is a voltage frequency deviation. The value is based on the industrial type as heavy industry. The equipment type is a large lathe. The preset voltage is 0.8 times of the rated voltage. It is judged whether the deviation value is greater than 0.8 times of the rated voltage. Similarly, the preset voltage minimum is obtained. By comparing the voltage data with the preset voltage maximum, the voltage overload will be minimized.

204. If the voltage data is greater than or equal to a preset voltage maximum value corresponding to the industrial type and device type, and/or the voltage data is less than or equal to a preset corresponding to the industrial type and the device type. The voltage minimum determines the change in the voltage data.

The determining the change of the voltage data is a specific case of determining that the voltage data exceeds a preset voltage maximum value or a preset voltage minimum value, for example, a frequency after the voltage change, a duration of the voltage suspension, and the like. No specific restrictions. For example, the voltage waveform is distorted, and when the maximum value of the voltage change is greater than the preset voltage maximum value, the frequency of the waveform distortion and the shape of the waveform change are determined. By determining the change of the voltage data, it is possible to accurately select the abnormal voltage suppression rule by changing the situation, thereby improving the efficiency of suppressing the abnormal voltage.

For the embodiment of the present invention, the step parallel to step 204: if the voltage data is greater than or equal to a preset voltage maximum value corresponding to the industrial type and device type, and/or the voltage data is less than or equal to the The industrial type and the preset voltage minimum corresponding to the device type are returned to step 201.

205. Select an abnormal voltage suppression rule corresponding to the change situation and the industrial type and device type.

The abnormal voltage suppression rule includes series, and/or parallel rules corresponding to different industrial types, different device types, and different voltage data changes. When configuring the series-parallel rules, it is necessary to consider the optimal matching between different abnormal voltage suppression devices.

For example, if the voltage change corresponding to the equipment 1 of the power plant is that the voltage is too low and the frequency at which the low voltage occurs is large, the combination of series and parallel is selected as the abnormal voltage suppression rule.

It should be noted that for the regulation of power quality, the factors affecting power quality include transmission voltage frequency, voltage deviation, voltage fluctuation and flicker, short-term and long-term power failure, transient over-voltage, voltage imbalance, voltage waveform and power supply. Signal voltage, etc., in order to improve power quality, harmonics, voltage fluctuations and flashing become the main object of suppression, Therefore, the series-parallel rules corresponding to different industrial types, different device types, and different voltage data changes are different.

206. Start an abnormal voltage suppression device corresponding to the monitoring position of the voltage data according to the abnormal voltage suppression rule.

Wherein the abnormal voltage suppression device comprises one of a compensator, a capacitor, a filter, or a series, and/or a parallel combination between the plurality of devices, the abnormal voltage suppression device being a device installed near the monitoring position, so that Inhibition in time. The compensator may be a dynamic reactive power compensation device SVC, an intelligent reactive power compensation controller, the capacitor may be an intelligent capacitor bank or the like, and the filter may be an active/passive power filter or the like, the present invention The embodiment is not specifically limited. The combination of the series or the parallel connection is not limited to the specific embodiment of the present invention.

It should be noted that, for different voltage changes in the embodiment of the present invention, the abnormal voltage suppression device may further include a static var generator SVG, an active voltage quality controller, an intelligent anti-sway power system, an imbalance, and a low A complete device such as a voltage control, a hybrid harmonic reactive compensation, and an original device such as an intelligent reactive power compensation controller, a thyristor module, a compensation module, an intelligent capacitor bank, a capacitor, a reactor, etc., in the embodiment of the present invention No specific restrictions.

For example, FRE series low-voltage dynamic reactive power compensation cabinet, XJCZK-L480 series suppression harmonic type smart capacitor module, XTSVG static reactive power compensation generator, XTAPF active filter, can be used as abnormal voltage suppression equipment.

Further, the embodiment of the present invention further includes: receiving voltage data sent by the voltage monitoring device located at different monitoring positions according to the second preset time interval; and determining again whether the voltage data matches the preset abnormal voltage; If the voltage data meets the preset abnormal voltage, it is determined that the current power system is abnormal and sends an alarm message.

The alarm information includes a monitoring position and the voltage data, and the second preset time interval is greater than the first preset time interval, in order to determine whether the voltage suppression is active, and it is necessary to determine whether the voltage data is abnormal voltage. . Generally, after an abnormal voltage suppression process has been performed, the abnormal voltage will disappear or decrease, but if it does not disappear or decrease, it indicates that a major accident has occurred in the power system, and it is necessary to send an alarm to the technician. To conduct a detailed screening of the power system.

Another method for monitoring an abnormal voltage in a power system according to an embodiment of the present invention is compared with the prior art that only the series harmonic filter and the compensator suppress voltage sudden changes, and the embodiment of the present invention determines the voltage at which the monitoring position is received. Whether the data conforms to the preset abnormal voltage, and if so, extracts the abnormal voltage suppression rule according to the change of the voltage data, and starts the abnormal voltage suppression device corresponding to the voltage data according to the rule, so as to reduce or rise in time before the voltage suddenly changes. The high voltage reduces the occurrence of short-term power outages, voltage surges or sudden drops, and enables timely remediation when the voltage reaches dangerous voltage values, thereby avoiding power interruption, equipment overheating and burning.

Further, as a specific implementation of the method shown in FIG. 1, the embodiment of the present invention provides a monitoring device for abnormal voltage in a power system. As shown in FIG. 3, the device may include: a first receiving unit 31, and a first determining Unit 32, extraction unit 33, and activation unit 34.

The first receiving unit 31 is configured to receive voltage data sent by the voltage monitoring device located at different monitoring positions according to the first preset time interval, where the different monitoring position is a position in the power system where the abnormal voltage exceeds the preset voltage threshold ;

The first determining unit 32 is configured to determine whether the voltage data matches a preset abnormal voltage, which is a maximum value and/or a minimum value of the power system carrying voltage increase and/or decrease, and an abnormal change voltage. ;

The extracting unit 33 is configured to: if matched, extract an abnormal voltage suppression rule corresponding to the change of the voltage data, where the abnormal voltage suppression rule is used to adjust the abnormal voltage to a normal voltage;

The starting unit 34 is configured to start an abnormal voltage suppression device corresponding to the monitoring position of the voltage data according to the abnormal voltage suppression rule.

According to an embodiment of the present invention, an abnormal voltage monitoring device in a power system is compared with a conventional series harmonic filter and a compensator to suppress a voltage sudden change, and the embodiment of the present invention determines the voltage data of the received monitoring position. Whether it meets the preset abnormal voltage, if yes, extracts the abnormal voltage suppression rule according to the change of the voltage data, and starts the abnormal voltage suppression device corresponding to the voltage data according to this rule, thereby realizing the lowering or raising in time before the voltage suddenly changes. The voltage reduces the occurrence of short-term power outages, voltage surges or sudden drops, and timely remediation when the voltage reaches dangerous voltage values, thereby avoiding power interruption, equipment overheating and burning.

The device embodiment corresponds to the foregoing method embodiment. For ease of reading, the device embodiment does not describe the details in the foregoing method embodiments one by one, but it should be clear that the device in this embodiment can implement the foregoing method. All the contents of the example.

Further, as a specific implementation of the method shown in FIG. 2, the embodiment of the present invention provides another monitoring device for abnormal voltage in the power system. As shown in FIG. 4, the device may include: a first receiving unit 41, a first The judging unit 42, the extracting unit 43, the starting unit 44, the second receiving unit 45, the second judging unit 46, and the determining unit 47.

The first receiving unit 41 is configured to receive voltage data sent by the voltage monitoring device located at different monitoring positions according to the first preset time interval, where the different monitoring position is a position in the power system where the abnormal voltage exceeds the preset voltage threshold ;

The first determining unit 42 is configured to determine whether the voltage data matches a preset abnormal voltage, which is a maximum value and/or a minimum value of a power system carrying voltage increase and/or decrease, and an abnormal change voltage. ;

The extracting unit 43 is configured to: if matched, extract an abnormal voltage suppression rule corresponding to the change of the voltage data, where the abnormal voltage suppression rule is used to adjust the abnormal voltage to a normal voltage;

The starting unit 44 is configured to start an abnormal voltage suppression device corresponding to the monitoring position of the voltage data according to the abnormal voltage suppression rule.

Specifically, the first determining unit 42 includes:

The first determining module 4201 is configured to determine an industrial type to which the current power system belongs and a device type to be monitored;

The determining module 4202 is configured to determine whether the voltage data is greater than or equal to a preset voltage maximum value corresponding to the industrial type and the device type, and/or determine whether the voltage data is less than or equal to the industrial type And a preset voltage minimum corresponding to the device type.

Specifically, the extracting unit 43 includes:

a second determining module 4301, configured to: if the voltage data is greater than or equal to a preset voltage maximum value corresponding to the industrial type and device type, and/or the voltage data is less than or equal to the industrial type and the Determining a change in the voltage data by a preset voltage minimum corresponding to the device type;

The selecting module 4302 is configured to select an abnormal voltage suppression rule corresponding to the change situation and the industrial type and device type.

Further, the device further includes:

The second receiving unit 45 is configured to receive, according to the second preset time interval, voltage data sent by the voltage monitoring device located at different monitoring positions, where the second preset time interval is greater than the first preset time interval;

a second determining unit 46, configured to determine again whether the voltage data matches a preset abnormal voltage;

The determining unit 47 is configured to: if yes, determine that the current power system is an abnormal condition, and send alarm information, where the alarm information includes a monitoring position and the voltage data.

Another apparatus for monitoring an abnormal voltage in an electric power system according to an embodiment of the present invention is compared with a conventional series harmonic filter and a compensator for suppressing a voltage sudden change. The embodiment of the present invention determines the voltage at which the monitoring position is received. Whether the data conforms to the preset abnormal voltage, and if so, extracts the abnormal voltage suppression rule according to the change of the voltage data, and starts the abnormal voltage suppression device corresponding to the voltage data according to the rule, so as to reduce or rise in time before the voltage suddenly changes. The high voltage reduces the occurrence of short-term power outages, voltage surges or sudden drops, and enables timely remediation when the voltage reaches dangerous voltage values, thereby avoiding power interruption, equipment overheating and burning.

The monitoring device for abnormal voltage in the power system includes a processor and a memory, and the first receiving unit, the first determining unit, the extracting unit, the starting unit, and the like are all stored as a program unit in a memory, and are executed by the processor and stored in the memory. The above program unit is used to implement the corresponding function.

The processor contains a kernel, and the kernel removes the corresponding program unit from the memory. The kernel can be set to one or more. The main purpose of adjusting the kernel parameters is to solve the different effects of different filters and compensators in suppressing the sudden rise and fall of the voltage, and the voltage requirements of the power system are different in different types of production processes. There will still be short-term power outages, voltage rises or decreases, and in the long run there will still be problems such as power interruption, equipment overheating and burning.

The memory may include non-persistent memory, random access memory (RAM), and/or non-volatile memory in a computer readable medium, such as read only memory (ROM) or flash memory (flashRAM), the memory including at least one memory chip.

The present application also provides a computer program product, when executed on a data processing device, adapted to perform program code initialization with the following method steps: receiving a voltage monitoring device at a different monitoring location according to a first predetermined time interval Voltage data, the different monitoring position is a position in the power system where the abnormal voltage number exceeds a preset voltage threshold; determining whether the voltage data matches a preset abnormal voltage, and the abnormal voltage is an increase in a power system carrying voltage And/or a reduced maximum value and/or minimum value, and an abnormal change voltage; if matched, extracting an abnormal voltage suppression rule corresponding to a change in the voltage data, the abnormal voltage suppression rule being used to adjust the abnormal voltage a normal voltage; an abnormal voltage suppression device corresponding to the monitoring position of the voltage data is activated according to the abnormal voltage suppression rule. .

Those skilled in the art will appreciate that embodiments of the present application can be provided as a method, system, or computer program product. Thus, the present application can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment in combination of software and hardware. Moreover, the application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the present application. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

In a typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.

The memory may include non-persistent memory, random access memory (RAM), and/or non-volatile memory, such as read only memory (ROM) or flash memory (flashRAM), in a computer readable medium. Memory is an example of a computer readable medium.

Computer readable media includes both permanent and non-persistent, removable and non-removable media. Information storage can be implemented by any method or technology. The information can be computer readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read only memory. (ROM), electrically erasable programmable read only memory (EEPROM), flash memory or other memory technology, compact disk read only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, Magnetic tape cartridges, magnetic tape storage or other magnetic storage devices or any other non-transportable media can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include temporary storage computer readable media, such as modulated data signals and carrier waves.

The above is only an embodiment of the present application and is not intended to limit the application. Various changes and modifications can be made to the present application by those skilled in the art. Any modifications, equivalents, improvements, etc. made within the spirit and scope of the present application are intended to be included within the scope of the appended claims.

Claims

A method for monitoring an abnormal voltage in a power system, comprising:

Receiving, by the first preset time interval, voltage data sent by the voltage monitoring device located at different monitoring positions, where the different monitoring positions are positions in the power system where the abnormal voltage number exceeds the preset voltage threshold;

Determining whether the voltage data matches a preset abnormal voltage, which is a maximum value and/or a minimum value of a power system carrying voltage increase and/or decrease, and an abnormal change voltage;

If matched, extracting an abnormal voltage suppression rule corresponding to the change of the voltage data, the abnormal voltage suppression rule for adjusting the abnormal voltage to a normal voltage;

And starting an abnormal voltage suppression device corresponding to the monitoring position of the voltage data according to the abnormal voltage suppression rule, the abnormal voltage suppression device comprising one of a compensator, a capacitor, a filter, or a series connection between the plurality, and / or parallel combination.
The method according to claim 1, wherein the determining whether the voltage data matches a preset abnormal voltage comprises:

Determining the type of industry to which the current power system belongs and the type of equipment to be monitored;

Determining whether the voltage data is greater than or equal to a preset voltage maximum value corresponding to the industrial type and the device type, and/or determining whether the voltage data is less than or equal to the industrial type and the device type The preset voltage minimum.
The method according to claim 2, wherein if the matching is performed, extracting an abnormal voltage suppression rule corresponding to the change of the voltage data comprises:

If the voltage data is greater than or equal to a preset voltage maximum value corresponding to the industrial type and device type, and/or the voltage data is less than or equal to a minimum preset voltage corresponding to the industrial type and the device type a value, determining a change in the voltage data;

An abnormal voltage suppression rule corresponding to the change situation and the industrial type and device type is selected.
The method according to any one of claims 1 to 3, wherein the abnormal voltage suppression rule comprises series, and/or parallel rules corresponding to different industrial types, different device types, and different voltage data variations.
The method according to claim 1, wherein the method further comprises: after the abnormal voltage suppression device corresponding to the monitoring position of the voltage data is activated according to the abnormal voltage suppression rule, the method further comprises:

Receiving, according to the second preset time interval, voltage data sent by the voltage monitoring device located at different monitoring positions, where the second preset time interval is greater than the first preset time interval;

Re-determining whether the voltage data matches a preset abnormal voltage;

If yes, it is determined that the current power system is abnormal, and the alarm information is sent, where the alarm information includes the monitoring position and the voltage data.
A device for monitoring an abnormal voltage in a power system, comprising:

a first receiving unit, configured to receive, according to a first preset time interval, voltage data sent by a voltage monitoring device located at different monitoring positions, where the different monitoring position is a position in the power system where the abnormal voltage number exceeds a preset voltage threshold;

a first determining unit, configured to determine whether the voltage data matches a preset abnormal voltage, where the abnormal voltage is a maximum value and/or a minimum value of a power system carrying voltage increase and/or decrease, and an abnormal change voltage;

And an extracting unit, configured to extract an abnormal voltage suppression rule corresponding to a change of the voltage data, wherein the abnormal voltage suppression rule is used to adjust the abnormal voltage to a normal voltage;

a startup unit, configured to start an abnormal voltage suppression device corresponding to the monitoring position of the voltage data according to the abnormal voltage suppression rule, where the abnormal voltage suppression device includes one of a compensator, a capacitor, and a filter, or multiple Series, and/or parallel combinations.
The apparatus according to claim 6, wherein the first determining unit comprises:

a first determining module, configured to determine an industrial type to which the current power system belongs and a device type to be monitored;

a determining module, configured to determine whether the voltage data is greater than or equal to a preset voltage maximum value corresponding to the industrial type and the device type, and/or determine whether the voltage data is less than or equal to the industrial type and The preset voltage minimum corresponding to the device type.
The apparatus according to claim 7, wherein said extracting unit comprises:

a second determining module, configured to: if the voltage data is greater than or equal to a preset voltage maximum value corresponding to the industrial type and device type, and/or the voltage data is less than or equal to the industrial type and the device Determining a minimum value of the preset voltage corresponding to the type, determining a change in the voltage data;

The selection module is configured to select an abnormal voltage suppression rule corresponding to the change situation and the industrial type and device type.
The apparatus according to any one of claims 6-8, wherein the abnormal voltage suppression rule comprises series, and/or parallel rules corresponding to different industrial types, different device types, and different voltage data variations.
The device according to claim 6, wherein the device further comprises:

The second receiving unit is configured to receive, according to the second preset time interval, voltage data sent by the voltage monitoring device located at different monitoring positions, where the second preset time interval is greater than the first preset time interval;

a second determining unit, configured to determine again whether the voltage data matches a preset abnormal voltage;

The determining unit is configured to: if yes, determine that the current power system is abnormal, and send alarm information, where the alarm information includes a monitoring location and the voltage data.