CN112636347A - Intelligent power filtering control system, method and storage medium - Google Patents

Intelligent power filtering control system, method and storage medium Download PDF

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Publication number
CN112636347A
CN112636347A CN202011445710.7A CN202011445710A CN112636347A CN 112636347 A CN112636347 A CN 112636347A CN 202011445710 A CN202011445710 A CN 202011445710A CN 112636347 A CN112636347 A CN 112636347A
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control
compensation
hierarchy
power
line
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CN112636347B (en
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胡雨倩
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Minguang Electric Technology Co ltd
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Minguang Electric Technology Co ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/01—Arrangements for reducing harmonics or ripples
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00001—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by the display of information or by user interaction, e.g. supervisory control and data acquisition systems [SCADA] or graphical user interfaces [GUI]
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/30—Reactive power compensation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/40—Arrangements for reducing harmonics
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/70—Smart grids as climate change mitigation technology in the energy generation sector
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00—Systems supporting electrical power generation, transmission or distribution
    • Y04S10/22—Flexible AC transmission systems [FACTS] or power factor or reactive power compensating or correcting units
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00—Systems supporting electrical power generation, transmission or distribution
    • Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications

Abstract

The invention discloses an intelligent power filter control system, a method and a storage medium, wherein the system comprises a bus line state monitoring unit, a plurality of levels of line state monitoring units, a plurality of levels of power filter compensation units, a display device and an operation end device which are all connected with a data operation control center; the bus line state monitoring unit and the line state monitoring units of a plurality of levels monitor line state parameters of respective levels in real time, data are transmitted to the data operation control center, and after operation analysis of an internally set control algorithm and a control strategy, control signals are output to the electric power filtering compensation unit of the corresponding level to control the electric power filtering compensation unit to filter and compensate the electric power network of each level, so that each level of electric power network is purified and stabilized, line loss is reduced, and power supply quality is improved. Compared with the prior art, the intelligent monitoring system can intelligently monitor the working state of the power grid and can adjust the abnormal or bad state of the power grid; and optimally controlling the power grid to work in the optimal state.

Description

Intelligent power filtering control system, method and storage medium
Technical Field
The invention belongs to the technical field of power control, and particularly relates to an intelligent power filtering control system, method and storage medium.
Background
In an electric power system, in order to prevent waveform distortion of a power grid, harmonic waves need to be filtered, power also needs to be balanced, active power needs to be balanced, and reactive power needs to be balanced, because under certain active power, the smaller the power factor is, the larger the required reactive power is, in order to meet power consumption requirements, the capacities of a power supply line and a transformer need to be increased, so that the power supply cost is increased, the equipment utilization rate is also reduced, the line loss is increased, and the main effect of reactive power compensation is to improve the power factor so as to reduce the equipment capacity and the power loss, stabilize voltage and improve the power supply quality. Most of the existing harmonic compensation or reactive power compensation in the power grid adopts the compensation of a local power grid which uses a power consumption unit or a power supply unit as a unit, such as: the traditional compensation modes can only be well adapted to one situation, and cannot comprehensively coordinate harmonic compensation and reactive power compensation of each level from the perspective of the whole world, and a power filtering control system which is established in a large area and multiple levels is not provided.
Therefore, how to solve the problems is to incorporate the state monitoring and the filtering compensation control of the power grid and the subordinate levels and lines thereof into a system on the basis of the original power filtering compensation function, timely and intelligently find the specific level and line group needing compensation, and make the power grid always in a good working state of intelligent efficient purification and stable power supply quality by integrally and coordinately performing local compensation, partial compensation or global compensation on the power grid, which is a problem that needs to be solved urgently now.
Disclosure of Invention
In order to solve the above problems, the present invention provides the following technical solutions:
on one hand, the invention provides an intelligent power filter control system, which comprises a bus line state monitoring unit, a plurality of levels of line state monitoring units, a plurality of levels of power filter compensation units, a display device and an operation end device, wherein the bus line state monitoring unit, the plurality of levels of line state monitoring units, the plurality of levels of power filter compensation units, the display device and the operation end device are all connected with a data operation control center; the rule of the region range contained by the hierarchy from top to bottom is that the hierarchy is gradually reduced, the upper hierarchy contains the next hierarchy, and the higher the hierarchy is, the larger the contained range is; the number and the containing range of the levels can be adjusted according to the specific situation of system layout in practice, but the rule of level setting is not changed;
the bus line state monitoring unit and the line state monitoring units of a plurality of levels monitor line state parameters of respective levels in real time, such as: the power supply system comprises a data operation control center, a display device, an operation terminal device, a power filter compensation unit, a power supply compensation unit, a power filter compensation unit and a power supply compensation unit, wherein the data operation control center is used for receiving and transmitting data, the power filter compensation unit is used for filtering and compensating power grids of different levels to purify and stabilize the power grids of different levels, reduce line loss and improve power supply quality, and the display device and the operation terminal device are used for displaying system data and operating system instructions respectively.
Furthermore, the line state monitoring units of a plurality of levels and the electric power filtering compensation units of a plurality of levels are arranged in the system in the same number of levels in a one-to-one correspondence manner, each level is provided with a plurality of line state monitoring units and a plurality of electric power filtering compensation units according to requirements, and monitoring data of the line state monitoring units of the same level correspond to the working state and the effect of the electric power filtering compensation units of the same level;
furthermore, each level line state monitoring unit in the plurality of levels of line state monitoring units comprises a line state monitoring device in each group of lines in the same level, and is arranged on each group of lines in the corresponding level to monitor the state parameters of the corresponding lines in real time and the working state and effect of the electric power filtering compensation unit.
Furthermore, each level of power filtering compensation unit in the plurality of levels of power filtering compensation units comprises a plurality of adaptive harmonic compensation devices and reactive power compensation devices; the harmonic compensation device is used for monitoring the harmonic state of the line in real time and generating compensation current to be injected into the line to eliminate harmonic signals, and comprises a harmonic detection unit and a harmonic compensation generation unit which are connected with a harmonic compensation operation unit; the reactive power compensation device is used for monitoring the reactive power state in a line in real time and performing dynamic compensation and comprises a reactive detection unit and a reactive compensation generation unit which are connected with a reactive compensation operation unit.
Furthermore, the power filtering compensation units of each level may include multiple sets of harmonic compensation devices and multiple sets of reactive power compensation devices, the specific number and combination mode are determined according to the installation position and capacity requirement of the line, and a power filter having both harmonic compensation and reactive power compensation functions may also be selected.
Furthermore, data transmission between each layer and between units in the same layer can be realized by a wired transmission mode or a high-reliability infinite transmission mode; the control can be carried out on site or remotely.
Further, a control method of the system, namely, a control algorithm and a control strategy set inside the data operation control center, performs operation analysis according to the line state parameters of each hierarchy and by combining information such as the working state and the effect of the power filtering compensation unit, and a specific control mode is as follows:
(1) mode start conditions:
Figure RE-132137DEST_PATH_IMAGE002
wherein the content of the first and second substances,
Figure 100002_RE-DEST_PATH_IMAGE003
is in the system
Figure RE-924644DEST_PATH_IMAGE004
Power factor of a group of lines of a hierarchy;
Figure 100002_RE-DEST_PATH_IMAGE005
is in the system
Figure RE-609441DEST_PATH_IMAGE004
Total power of a group of lines of a hierarchy;
Figure RE-270230DEST_PATH_IMAGE006
is in the system
Figure RE-5973DEST_PATH_IMAGE004
A certain group of lines in hierarchy corresponds to
Figure 100002_RE-DEST_PATH_IMAGE007
The first contained in the hierarchy
Figure RE-405599DEST_PATH_IMAGE008
Load power of the strip line;
Figure 100002_RE-DEST_PATH_IMAGE009
is in the system
Figure RE-79157DEST_PATH_IMAGE004
A certain group of lines in hierarchy corresponds to
Figure RE-589642DEST_PATH_IMAGE007
The first contained in the hierarchy
Figure RE-992942DEST_PATH_IMAGE008
The power factor of the line;
Figure RE-783043DEST_PATH_IMAGE008
is in the system
Figure RE-147159DEST_PATH_IMAGE004
A certain group of lines in hierarchy corresponds to
Figure RE-680909DEST_PATH_IMAGE007
In the hierarchy
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A line;
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is in the system
Figure RE-921769DEST_PATH_IMAGE004
A certain group of lines in hierarchy corresponds to
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The number of lines included in total in the hierarchy;
Figure 100002_RE-DEST_PATH_IMAGE011
is in the system
Figure RE-450151DEST_PATH_IMAGE004
Parameter limits for a set of line control mode starts at a level;
(2) the mode control algorithm:
control algorithm compensates for lift rate from system level
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Performing operation analysis when the requirements are not met
Figure 100002_RE-DEST_PATH_IMAGE013
When the condition(s) is satisfied, the system control mode starts the intervention control
Figure RE-684878DEST_PATH_IMAGE013
When the condition is met, the control mode is interrupted, and the system enters a monitoring state;
system level compensation boost rate
Figure RE-232534DEST_PATH_IMAGE012
The specific algorithm is as follows:
Figure 100002_RE-DEST_PATH_IMAGE015
wherein the content of the first and second substances,
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is in the system
Figure RE-908683DEST_PATH_IMAGE004
The compensation boost rate of a group of lines of a hierarchy;
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is in the system
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The power factor of a certain group of circuits in the hierarchy after unit time passes after the intervention control of a control mode;
Figure 100002_RE-DEST_PATH_IMAGE017
is in the system
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A certain group of lines in hierarchy corresponds to
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The first contained in the hierarchy
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The power factor of the line after unit time after the intervention control of the control mode;
Figure RE-168115DEST_PATH_IMAGE018
is in the system
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A certain group of lines in hierarchy corresponds to
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The first contained in the hierarchy
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Line voltage of the line after unit time passes after the intervention control of the control mode;
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is in the system
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A certain group of lines in hierarchy corresponds to
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The first contained in the hierarchy
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Line current of the line after unit time passes after the intervention control of the control mode;
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is in the system
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Line voltage of a certain group of lines in a hierarchy after unit time passes after control mode intervention control;
Figure 100002_RE-DEST_PATH_IMAGE021
is in the system
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Line current of a certain group of lines in a hierarchy after unit time passes after control mode intervention control;
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is in the system control mode algorithm
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Compensating boost rates for a set of lines in a hierarchy
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Corresponding parameter limits;
description of the drawings: the unit time refers to the time with the same length and consistent starting and stopping time; system level compensation boost rate
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In the specific algorithm of (a) above,
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and
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are the monitored values at the same time,
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and
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to be driven from
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And
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the same time monitoring value after the same length of unit time;
(3) mode output correction amount control value:
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wherein:
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when it is not satisfied
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In the case of the condition (2), after the system control mode is intervened in the control, the system is output through operation analysis
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A certain group of lines in hierarchy corresponds to
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The first contained in the hierarchy
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A correction amount control value of one line;
Figure 100002_RE-DEST_PATH_IMAGE027
is in the system
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A certain group of lines in hierarchy corresponds to
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The first contained in the hierarchy
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A target power factor for the line;
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is in the system
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Target power factors for a set of lines of a hierarchy;
Figure 100002_RE-DEST_PATH_IMAGE029
is the adjustment stage number of the correction amount control value;
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the compensation amount is a compensation amount of the correction amount control value, and is related to the load and loss not included in the system.
Description of the drawings: in the above system
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Has a hierarchy of
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In the upper level of the level, each monitoring value is obtained by monitoring the circuit state monitoring device arranged in each group or each circuit in the corresponding level; the mode start condition, the mode control algorithm and the output correction amount control value in the control mode are all calculated
Figure RE-702511DEST_PATH_IMAGE004
A certain group of lines in the hierarchy is mainly explained, and the specific contents and control rules of the control modes of other hierarchies and other groups of lines are all consistent with the above.
The system working principle and the mode control strategy are as follows: under the normal operating mode, the electric power filtering compensation unit independently normally works, each level line state monitoring unit monitors the line state and the working effect of the electric power filtering compensation unit in real time, when the system finds that the monitoring value meets the control mode starting condition, the system is controlled in an intervention mode, analysis is carried out through a mode control algorithm, then a corresponding correction control value is output through operation, the electric power filtering compensation unit between the corresponding level and the corresponding line is controlled, and the system enters the monitoring state again until the condition that the control mode is finished in the intervention mode is met.
In another aspect, the present invention further provides an intelligent power filter control method, which is applied to the intelligent power filter control system described above, and includes:
each level of power filtering compensation unit automatically and normally works, and each level of line state monitoring unit monitors the line state and the working effect of the power filtering compensation unit in real time;
when the system finds that the monitoring value meets the control mode starting condition, the system is subjected to intervention control, analysis is carried out through a mode control algorithm, then a corresponding correction control value is output through calculation, and control of a power filtering compensation unit between a corresponding level and a line is carried out;
each level of line state monitoring unit continues monitoring, new monitoring data are transmitted to the system, the system judges whether the condition of ending the intervention of the control mode is met, if not, the corresponding correction control value is calculated again to output for control; if the real-time monitoring state is reached, the system enters the real-time monitoring state again.
In addition, the present invention also provides a computer-readable storage medium, on which a computer program is stored, wherein the computer program is executed by a processor to implement the above-mentioned intelligent power filtering control method, and the method comprises the following steps:
(1) starting the system, carrying out electric inspection on each part in the system, and entering a control program of the system after the starting detection is passed;
(2) entering a real-time monitoring state, and acquiring monitoring data monitored by each level of line state monitoring units in real time, wherein the monitoring data comprises the line state and the working effect of the power filtering compensation unit;
(3) judging whether a control mode starting condition is met or not according to the monitoring data, if so, carrying out system intervention control, analyzing through a mode control algorithm, outputting a corresponding correction control value through operation, outputting the correction control value to a power filtering compensation unit between a corresponding level and a circuit, and dynamically controlling the working state of the power filtering compensation unit;
(4) continuously monitoring by each level of line state monitoring unit, continuously transmitting new monitoring data to the system, judging whether a control mode intervention ending condition is met or not by the system, if not, recalculating and outputting a corresponding correction control value for control; if the real-time monitoring state is reached, the system enters the real-time monitoring state again.
Compared with the prior art, the invention has the following beneficial effects:
(1) the invention monitors the line state of each level of the power grid on the whole, applies a real-time monitoring and intelligent control theory method to monitor the power supply state of each level and line in the power grid in real time, dynamically injects the required compensation current into the power grid, realizes intelligent harmonic filtering, and simultaneously can provide leading or lagging reactive current for each level and line group according to the monitoring data, so as to improve the power factor of the power grid and realize dynamic reactive power compensation;
(2) on the premise of ensuring the stability of the whole power grid, the reactive power of each level and each line is dynamically tracked and compensated, so that each item of investment cost of power supply is reduced, the utilization rate of equipment in a system is improved, the loss of a power supply line is reduced, the power of the power grid is balanced, and the economic operation efficiency of the power grid is improved on the whole;
(3) the invention brings the power grid and the subordinate levels and lines thereof into an integral system, establishes the monitoring network of each level, and carries out global regulation and control on the power filtering compensation unit of each level, and according to the line monitoring condition obtained by the monitoring network, because the power supply network is subjected to line monitoring of the hierarchical level line group and control on the power filtering compensation unit, the invention can carry out local compensation, partial compensation or global compensation on the power grid in an integral and coordinated manner, and can also find the specific level and line group needing compensation in time, thereby achieving the purposes of intelligently and efficiently purifying the power grid and stabilizing the power supply quality of the power grid;
(4) the power supply state of each level and line group of the power grid is dynamically monitored, various abnormal or bad states can be found in time, a system control mode is rapidly intervened, the power filtering compensation units of the corresponding levels and line groups are controlled to cooperatively work, the power grid is rapidly recovered to a good working state, the system is intelligently monitored, the dynamic response speed is high, the real-time performance is high, and the control is timely;
(5) because the global monitoring and the global control are realized, the excessive compensation of the power filtering compensation unit of a certain level or a certain group of circuits and the influence of the unbalance of a local power grid on the stability and the power supply quality of the power grid caused by the excessive compensation are avoided;
(6) the actual state of the power grid is more truly and accurately reflected due to the overall monitoring of the power grid, so that the specific level or line group part with abnormal work or poor work in the power grid can be intelligently and accurately found in time, the intelligent monitoring of the power grid is realized, the real-time response of the monitoring is quick, the abnormal or poor part is accurately positioned, and the finding is timely;
(7) due to the fact that the power grid is monitored in a global dynamic mode in a hierarchical mode and a branch line group, monitoring data can be collected and stored in a database after being processed, historical data are stored, trend analysis of the power grid state can be conducted through data mining, scientific and reasonable layout of power filtering compensation units is achieved, situations of insufficient device layout capacity and the like are avoided, and the situation that the power filtering compensation units are not affected in the bud is achieved;
(8) the wired or wireless transmission mode can be adopted to realize the field control or the remote control;
(9) the invention can adopt the optimized structure of the master station and the slave station, and can further save the cost and simplify the system by combining with a simplified scheme, so that the system is more optimized and more practical in structure, more saved in cost and obviously improved in performance on the basis of meeting the complete function.
Drawings
For ease of illustration, the invention is described in detail by the following detailed description and the accompanying drawings.
FIG. 1 is a schematic diagram of the system of the present invention;
FIG. 2 is a schematic diagram of a power filter compensation unit according to the present invention;
FIG. 3 is a diagram illustrating an exemplary layout structure of 3 levels according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of an exemplary 3-level system architecture in an embodiment of the present invention;
FIG. 5 is a control flow diagram of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.
Example 1
In a specific embodiment, as shown in fig. 1, the method of the present invention may be implemented in an intelligent power filtering control system, which includes a bus line state monitoring unit, a plurality of levels of line state monitoring units, a plurality of levels of power filtering compensation units, a display device, and an operation end device, all of which are connected to a data operation control center, wherein the plurality of levels of line state monitoring units and the plurality of levels of power filtering compensation units are arranged in a one-to-one correspondence manner at the same level; the rule of the region range contained by the hierarchy from top to bottom is that the hierarchy is gradually reduced, the upper hierarchy contains the next hierarchy, and the higher the hierarchy is, the larger the contained range is; the number and the containing range of the levels can be adjusted according to the specific situation of system layout in practice, but the rule of level setting is not changed;
the bus line state monitoring unit and the line state monitoring units of a plurality of levels monitor line state parameters of respective levels in real time, such as: the power supply system comprises a data operation control center, a display device, an operation terminal device, a power filter compensation unit, a power supply compensation unit, a power filter compensation unit and a power supply compensation unit, wherein the data operation control center is used for receiving and transmitting data, the power filter compensation unit is used for filtering and compensating power grids of different levels to purify and stabilize the power grids of different levels, reduce line loss and improve power supply quality, and the display device and the operation terminal device are used for displaying system data and operating system instructions respectively.
The line state monitoring units of a plurality of levels and the electric power filtering compensation units of a plurality of levels are arranged in the system in the same number of levels which are in one-to-one correspondence, each level is provided with a plurality of line state monitoring units and a plurality of electric power filtering compensation units according to requirements, and monitoring data of the line state monitoring units of the same level correspond to the working state and the effect of the electric power filtering compensation units of the same level;
the line state monitoring units of each level in the line state monitoring units of the levels respectively comprise line state monitoring devices in each group of lines of the same level, and are arranged on each group of lines in the corresponding level to monitor the state parameters of the corresponding lines in real time and the working state and effect of the power filtering compensation unit.
As shown in fig. 2, each of the power filtering compensation units of each of the plurality of levels includes a plurality of adaptive harmonic compensation devices and reactive power compensation devices; the harmonic compensation device is used for monitoring the harmonic state of the line in real time and generating compensation current to be injected into the line to eliminate harmonic signals, and comprises a harmonic detection unit and a harmonic compensation generation unit which are connected with a harmonic compensation operation unit; the reactive power compensation device is used for monitoring the reactive power state in a line in real time and performing dynamic compensation and comprises a reactive detection unit and a reactive compensation generation unit which are connected with a reactive compensation operation unit.
The power filtering compensation units of each level can comprise a plurality of groups of harmonic compensation devices and a plurality of groups of reactive power compensation devices, the specific number and combination mode are determined according to the installation position and capacity requirement of a line, and a power filter with harmonic compensation and reactive power compensation functions can be selected.
Data transmission among all layers and among units in the same layer can adopt a wired transmission mode or a high-reliability infinite transmission mode; the control can be carried out on site or remotely.
Example 2
In a specific embodiment, as shown in fig. 1, the method of the present invention may be implemented in an intelligent power filtering control system, which includes a bus line state monitoring unit, a plurality of levels of line state monitoring units, a plurality of levels of power filtering compensation units, a display device, and an operation end device, all of which are connected to a data operation control center, wherein the plurality of levels of line state monitoring units and the plurality of levels of power filtering compensation units are arranged in a one-to-one correspondence manner at the same level; the rule of the region range contained by the hierarchy from top to bottom is that the hierarchy is gradually reduced, the upper hierarchy contains the next hierarchy, and the higher the hierarchy is, the larger the contained range is; the number and the containing range of the levels can be adjusted according to the specific situation of system layout in practice, but the rule of level setting is not changed;
the bus line state monitoring unit and the line state monitoring units of a plurality of levels monitor line state parameters of respective levels in real time, such as: the power supply system comprises a data operation control center, a display device, an operation terminal device, a power filter compensation unit, a power supply compensation unit, a power filter compensation unit and a power supply compensation unit, wherein the data operation control center is used for receiving and transmitting data, the power filter compensation unit is used for filtering and compensating power grids of different levels to purify and stabilize the power grids of different levels, reduce line loss and improve power supply quality, and the display device and the operation terminal device are used for displaying system data and operating system instructions respectively.
The line state monitoring units of a plurality of levels and the electric power filtering compensation units of a plurality of levels are arranged in the system in the same number of levels which are in one-to-one correspondence, each level is provided with a plurality of line state monitoring units and a plurality of electric power filtering compensation units according to requirements, and monitoring data of the line state monitoring units of the same level correspond to the working state and the effect of the electric power filtering compensation units of the same level;
the line state monitoring units of each level in the line state monitoring units of the levels respectively comprise line state monitoring devices in each group of lines of the same level, and are arranged on each group of lines in the corresponding level to monitor the state parameters of the corresponding lines in real time and the working state and effect of the power filtering compensation unit.
As shown in fig. 2, each of the power filtering compensation units of each of the plurality of levels includes a plurality of adaptive harmonic compensation devices and reactive power compensation devices; the harmonic compensation device is used for monitoring the harmonic state of the line in real time and generating compensation current to be injected into the line to eliminate harmonic signals, and comprises a harmonic detection unit and a harmonic compensation generation unit which are connected with a harmonic compensation operation unit; the reactive power compensation device is used for monitoring the reactive power state in a line in real time and performing dynamic compensation and comprises a reactive detection unit and a reactive compensation generation unit which are connected with a reactive compensation operation unit.
The power filtering compensation units of each level can comprise a plurality of groups of harmonic compensation devices and a plurality of groups of reactive power compensation devices, the specific number and combination mode are determined according to the installation position and capacity requirement of a line, and a power filter with harmonic compensation and reactive power compensation functions can be selected.
Data transmission among all layers and among units in the same layer can adopt a wired transmission mode or a high-reliability infinite transmission mode; the control can be carried out on site or remotely.
The control method of the system, namely a control algorithm and a control strategy set in a data operation control center, performs operation analysis according to the line state parameters of each level and by combining the information such as the working state and the effect of the power filtering compensation unit, and the specific control mode is as follows:
(1) mode start conditions:
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wherein the content of the first and second substances,
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is in the system
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Power factor of a group of lines of a hierarchy;
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is in the system
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Total power of a group of lines of a hierarchy;
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is in the system
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A certain group of lines in hierarchy corresponds to
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The first contained in the hierarchy
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Load power of the strip line;
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is in the system
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A certain group of lines in hierarchy corresponds to
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The first contained in the hierarchy
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The power factor of the line;
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is in the system
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A certain group of lines in hierarchy corresponds to
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In the hierarchy
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A line;
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is in the system
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A certain group of lines in hierarchy corresponds to
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The number of lines included in total in the hierarchy;
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is in the system
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Parameter limits for a set of line control mode starts at a level;
(2) the mode control algorithm:
control algorithm compensates for lift rate from system level
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Performing operation analysis when the requirements are not met
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When the condition(s) is satisfied, the system control mode starts the intervention control
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When the condition is met, the control mode is interrupted, and the system enters a monitoring state;
system level compensation boost rate
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The specific algorithm is as follows:
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wherein the content of the first and second substances,
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is in the system
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The compensation boost rate of a group of lines of a hierarchy;
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is in the system
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The power factor of a certain group of circuits in the hierarchy after unit time passes after the intervention control of a control mode;
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is in the system
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A certain group of lines in hierarchy corresponds to
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The first contained in the hierarchy
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The power factor of the line after unit time after the intervention control of the control mode;
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is in the system
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A certain group of lines in hierarchy corresponds to
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The first contained in the hierarchy
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Line voltage of the line after unit time passes after the intervention control of the control mode;
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is in the system
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A certain group of lines in hierarchy corresponds to
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The first contained in the hierarchy
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Line current of the line after unit time passes after the intervention control of the control mode;
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is in the system
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Line voltage of a certain group of lines in a hierarchy after unit time passes after control mode intervention control;
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is in the system
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Line current of a certain group of lines in a hierarchy after unit time passes after control mode intervention control;
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is in the system control mode algorithm
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Compensating boost rates for a set of lines in a hierarchy
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Corresponding parameter limits;
description of the drawings: the unit time refers to the time with the same length and consistent starting and stopping time; system level compensation boost rate
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In the specific algorithm of (a) above,
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and
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are the monitored values at the same time,
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and
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to be driven from
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And
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the same time monitoring value after the same length of unit time;
(3) mode output correction amount control value:
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wherein:
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when it is not satisfied
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In the case of the condition (2), after the system control mode is intervened in the control, the system is output through operation analysis
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A certain group of lines in hierarchy corresponds to
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The first contained in the hierarchy
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A correction amount control value of one line;
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is in the system
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A certain group of lines in hierarchy corresponds to
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The first contained in the hierarchy
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A target power factor for the line;
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is in the system
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Target power factors for a set of lines of a hierarchy;
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is the adjustment stage number of the correction amount control value;
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the compensation amount is a compensation amount of the correction amount control value, and is related to the load and loss not included in the system.
Description of the drawings: in the above system
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Has a hierarchy of
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In the upper level of the level, each monitoring value is obtained by monitoring the circuit state monitoring device arranged in each group or each circuit in the corresponding level; the mode start condition, the mode control algorithm and the output correction amount control value in the control mode are all calculated
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A certain group of lines in the hierarchy is mainly explained, and the specific contents and control rules of the control modes of other hierarchies and other groups of lines are all consistent with the above.
The system working principle and the mode control strategy are as follows: under the normal operating mode, the electric power filtering compensation unit independently normally works, each level line state monitoring unit monitors the line state and the working effect of the electric power filtering compensation unit in real time, when the system finds that the monitoring value meets the control mode starting condition, the system is controlled in an intervention mode, analysis is carried out through a mode control algorithm, then a corresponding correction control value is output through operation, the electric power filtering compensation unit between the corresponding level and the corresponding line is controlled, and the system enters the monitoring state again until the condition that the control mode is finished in the intervention mode is met.
The control method applied to the intelligent power filter control system as described above, as shown in fig. 5, includes:
each level of power filtering compensation unit automatically and normally works, and each level of line state monitoring unit monitors the line state and the working effect of the power filtering compensation unit in real time;
when the system finds that the monitoring value meets the control mode starting condition, the system is subjected to intervention control, analysis is carried out through a mode control algorithm, then a corresponding correction control value is output through calculation, and control of a power filtering compensation unit between a corresponding level and a line is carried out;
each level of line state monitoring unit continues monitoring, new monitoring data are transmitted to the system, the system judges whether the condition of ending the intervention of the control mode is met, if not, the corresponding correction control value is calculated again to output for control; if the real-time monitoring state is reached, the system enters the real-time monitoring state again.
In addition, a computer readable storage medium, on which a computer program is stored, which when executed by a processor, implements the above-described intelligent power filter control system functions and methods with the steps of:
(1) starting the system, carrying out electric inspection on each part in the system, and entering a control program of the system after the starting detection is passed;
(2) entering a real-time monitoring state, and acquiring monitoring data monitored by each level of line state monitoring units in real time, wherein the monitoring data comprises the line state and the working effect of the power filtering compensation unit;
(3) judging whether a control mode starting condition is met or not according to the monitoring data, if so, carrying out system intervention control, analyzing through a mode control algorithm, outputting a corresponding correction control value through operation, outputting the correction control value to a power filtering compensation unit between a corresponding level and a circuit, and dynamically controlling the working state of the power filtering compensation unit;
(4) continuously monitoring by each level of line state monitoring unit, continuously transmitting new monitoring data to the system, judging whether a control mode intervention ending condition is met or not by the system, if not, recalculating and outputting a corresponding correction control value for control; if the real-time monitoring state is reached, the system enters the real-time monitoring state again.
Example 3
On the basis of the embodiment 1 or 2, a typical 3-level system structure and a typical level layout principle are illustrated as follows:
the system structure is shown in fig. 3: the system comprises a bus line state unit, a 1-level line state unit, a 2-level line state unit, a 3-level line state unit, a 1-level harmonic compensation device, a 1-level reactive power compensation device, a 2-level harmonic compensation device, a 2-level reactive power compensation device, a 3-level harmonic compensation device, a 3-level reactive power compensation device, a display device and operation end equipment which are all connected with a data transportation control center;
the system level layout principle is shown in fig. 4, and specifically includes the following steps:
(1) the 1 level is distributed on a regional bus or a local main substation bus included under a power grid;
(2) the 2 levels are distributed on a power consumption unit bus or a bus of a power transformation and distribution substation under a bus substation;
(3) the 3 levels are distributed in workshops or large-scale electric equipment which need harmonic compensation or reactive power compensation in the electric units;
in the embodiment, the three-level layout principle can be suitable for reasonable deployment of power grids of multiple scale levels, but the control mode, the control algorithm and the control strategy are all consistent with those described in the embodiments 1 and 2, and the principle is unchanged; of course, when each level of power filtering compensation unit is provided, it is basically provided separately where needed for global, local or individual deployment of the control system.
Other related contents are also consistent with those described in embodiment 1 or 2, and are not described herein.
Real-time example 4
This example is a simplified scheme based on the standard scheme of example 1 or example 2, and aims to reduce the number of system components, the system volume, the steps and the matching cost.
The main simplification is as follows:
scheme 1: if the monitoring unit in the filtering compensation device or the reactive power compensation device meets the system monitoring requirement and the data precision requirement, the monitoring data of each level of line state monitoring unit can be adopted, the system cost is saved, the number of system parts is reduced, and the installation is simplified;
scheme 2: in order to further improve the system integration degree, a device with harmonic compensation and reactive power compensation functions, such as an active power filter compensator, can be adopted to meet the system requirements and functions;
scheme 3: each component in the system relates to a part of data I/O, and a processing chip or an integrated circuit board with an AD converter and a DA converter can be adopted as much as possible on the premise of meeting the requirement, so that frequent conversion between analog data and digital data can be omitted, the input data can be directly processed and used no matter whether the input data is analog data or digital data, the quantity and the volume of parts are reduced, and the response speed of the system is improved;
the schemes of the embodiment 1 or 2 are still adopted in other parts, and the plurality of simplified schemes can be used independently or in combination.
Example 5
The present embodiment is an optimization scheme performed on the basis of the scheme of embodiment 1 or embodiment 2, and aims to further optimize the system structure and the practicability.
The specific optimization scheme is as follows: the bus line state monitoring unit and the data transportation control center in the embodiment 1 or 2 are taken as a master station, the line state monitoring unit and the power filter compensation unit at the same level are separately connected with a controller as a slave station, the slave station is in data connection with the master station, then the structure of the master station and a plurality of slave stations is formed for unified control, the slave stations provide monitoring data for the master station and receive control instructions of the master station, the master station is used as a master control unit, the slave stations are used as subordinate individual control units, thus not only reducing the data calculation amount of the master station, and the slave station transmits the primary data to the master station after the primary data processing, so that the operation of the master station is faster, the overall response speed of the system is improved, meanwhile, the slave stations can be controlled independently, if only one slave station needs to be adjusted, the slave stations can be controlled independently without the master station, and the response speed is also improved; the optimized structure can be combined with the simplified scheme in the embodiment 4, so that the system is more optimized and practical in structure, more saved in cost and obviously improved in performance on the basis of meeting the complete function.
Compared with the prior art, the invention has the following beneficial effects:
(1) the invention monitors the line state of each level of the power grid on the whole, applies a real-time monitoring and intelligent control theory method to monitor the power supply state of each level and line in the power grid in real time, dynamically injects the required compensation current into the power grid, realizes intelligent harmonic filtering, and simultaneously can provide leading or lagging reactive current for each level and line group according to the monitoring data, so as to improve the power factor of the power grid and realize dynamic reactive power compensation;
(2) on the premise of ensuring the stability of the whole power grid, the reactive power of each level and each line is dynamically tracked and compensated, so that each item of investment cost of power supply is reduced, the utilization rate of equipment in a system is improved, the loss of a power supply line is reduced, the power of the power grid is balanced, and the economic operation efficiency of the power grid is improved on the whole;
(3) the invention brings the power grid and the subordinate levels and lines thereof into an integral system, establishes the monitoring network of each level, and carries out global regulation and control on the power filtering compensation unit of each level, and according to the line monitoring condition obtained by the monitoring network, because the power supply network is subjected to line monitoring of the hierarchical level line group and control on the power filtering compensation unit, the invention can carry out local compensation, partial compensation or global compensation on the power grid in an integral and coordinated manner, and can also find the specific level and line group needing compensation in time, thereby achieving the purposes of intelligently and efficiently purifying the power grid and stabilizing the power supply quality of the power grid;
(4) the power supply state of each level and line group of the power grid is dynamically monitored, various abnormal or bad states can be found in time, a system control mode is rapidly intervened, the power filtering compensation units of the corresponding levels and line groups are controlled to cooperatively work, the power grid is rapidly recovered to a good working state, the system is intelligently monitored, the dynamic response speed is high, the real-time performance is high, and the control is timely;
(5) because the global monitoring and the global control are realized, the excessive compensation of the power filtering compensation unit of a certain level or a certain group of circuits and the influence of the unbalance of a local power grid on the stability and the power supply quality of the power grid caused by the excessive compensation are avoided;
(6) the actual state of the power grid is more truly and accurately reflected due to the overall monitoring of the power grid, so that the specific level or line group part with abnormal work or poor work in the power grid can be intelligently and accurately found in time, the intelligent monitoring of the power grid is realized, the real-time response of the monitoring is quick, the abnormal or poor part is accurately positioned, and the finding is timely;
(7) due to the fact that the power grid is monitored in a global dynamic mode in a hierarchical mode and a branch line group, monitoring data can be collected and stored in a database after being processed, historical data are stored, trend analysis of the power grid state can be conducted through data mining, scientific and reasonable layout of power filtering compensation units is achieved, situations of insufficient device layout capacity and the like are avoided, and the situation that the power filtering compensation units are not affected in the bud is achieved;
(8) the wired or wireless transmission mode can be adopted to realize the field control or the remote control;
(9) the invention can adopt the optimized structure of the master station and the slave station, and can further save the cost and simplify the system by combining with a simplified scheme, so that the system is more optimized and more practical in structure, more saved in cost and obviously improved in performance on the basis of meeting the complete function.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (9)

1. An intelligent power filter control system is characterized by comprising a bus line state monitoring unit, a plurality of levels of line state monitoring units, a plurality of levels of power filter compensation units, a display device and operation end equipment which are all connected with a data operation control center, wherein the plurality of levels of line state monitoring units and the plurality of levels of power filter compensation units are correspondingly provided with the same level one by one; the rule of the region range contained by the hierarchy from top to bottom is that the hierarchy is gradually reduced, the upper hierarchy contains the next hierarchy, and the higher the hierarchy is, the larger the contained range is;
the system comprises a bus line state monitoring unit and a plurality of levels of line state monitoring units, wherein the bus line state monitoring unit and the line state monitoring units monitor line state parameters of respective levels in real time, the state line state parameters comprise voltage, current, load power, line power, frequency and power factors, data are transmitted to a data operation control center, and after operation analysis of a preset control algorithm and a control strategy, control signals are output to electric power filtering compensation units of corresponding levels to control the electric power filtering compensation units to filter and compensate electric networks of the levels; the display device and the operation terminal equipment respectively display system data and operation system instructions.
2. The intelligent power filter control system according to claim 1, wherein the plurality of levels of line state monitoring units and the plurality of levels of power filter compensation units are arranged in the system in the same number of levels, the same number of levels are arranged in a one-to-one correspondence manner, each level is provided with a plurality of line state monitoring units and a plurality of power filter compensation units according to requirements, and monitoring data of the line state monitoring units in the same level correspond to the operating state and effect of the power filter compensation units in the same level.
3. The intelligent power filter control system according to claim 2, wherein each of the plurality of levels of line state monitoring units comprises a line state monitoring device in each group of lines in the same level, and the line state monitoring devices are arranged on each group of lines in the corresponding level to monitor state parameters of the corresponding lines in real time and working states and effects of the power filter compensation units.
4. The intelligent power filter control system according to claim 3, wherein each of the plurality of levels of power filter compensation units comprises a plurality of adaptive harmonic compensation devices and reactive power compensation devices; the harmonic compensation device is used for monitoring the harmonic state of the line in real time and generating compensation current to be injected into the line to eliminate harmonic signals, and comprises a harmonic detection unit and a harmonic compensation generation unit which are connected with a harmonic compensation operation unit; the reactive power compensation device is used for monitoring the reactive power state in a line in real time and performing dynamic compensation and comprises a reactive detection unit and a reactive compensation generation unit which are connected with a reactive compensation operation unit.
5. The intelligent power filter control system according to claim 4, wherein each of the power filter compensation units of each of the levels comprises a plurality of sets of harmonic compensation devices and a plurality of sets of reactive power compensation devices; or, the power filtering compensation unit of each layer comprises a power filter with both harmonic compensation and reactive compensation functions.
6. An intelligent power filter control system according to claim 5, wherein data transmission between each level and between units in the same level is implemented by wired transmission or high-reliability infinite transmission; data transmission between each layer and the same layer unit adopts field control or remote control.
7. The intelligent power filter control system according to any one of claims 1 to 6, wherein a control method of the system, that is, a control algorithm and a control strategy preset by the data operation control center, performs operation analysis according to line state parameters of each hierarchy and in combination with operating state and effect information of the power filter compensation unit, and a specific control mode is as follows:
(1) mode start conditions:
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wherein the content of the first and second substances,
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is in the system
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Hierarchy a set of linesThe power factor of (c);
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is in the system
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Total power of a group of lines of a hierarchy;
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is in the system
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A certain group of lines in hierarchy corresponds to
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The first contained in the hierarchy
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Load power of the strip line;
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is in the system
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A certain group of lines in hierarchy corresponds to
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The first contained in the hierarchy
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The power factor of the line;
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is in the system
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A certain group of lines in hierarchy corresponds to
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In the hierarchy
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A line;
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is in the system
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A certain group of lines in hierarchy corresponds to
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The number of lines included in total in the hierarchy;
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is in the system
Figure RE-149157DEST_PATH_IMAGE004
Parameter limits for a set of line control mode starts at a level;
(2) the mode control algorithm:
control algorithm compensates for lift rate from system level
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Performing operation analysis when the requirements are not met
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Under the condition ofThe system control mode starts to intervene in the control when it is satisfied
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When the condition is met, the control mode is interrupted, and the system enters a monitoring state;
system level compensation boost rate
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The specific algorithm is as follows:
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wherein the content of the first and second substances,
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is in the system
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The compensation boost rate of a group of lines of a hierarchy;
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is in the system
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The power factor of a certain group of circuits in the hierarchy after unit time passes after the intervention control of a control mode;
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is in the system
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A certain group of lines in hierarchy corresponds to
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The first contained in the hierarchy
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The power factor of the line after unit time after the intervention control of the control mode;
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is in the system
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A certain group of lines in hierarchy corresponds to
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The first contained in the hierarchy
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Line voltage of the line after unit time passes after the intervention control of the control mode;
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is in the system
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A certain group of lines in hierarchy corresponds to
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The first contained in the hierarchy
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Line current of the line after unit time passes after the intervention control of the control mode;
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is in the system
Figure RE-458805DEST_PATH_IMAGE004
Line voltage of a certain group of lines in a hierarchy after unit time passes after control mode intervention control;
Figure RE-DEST_PATH_IMAGE021
is in the system
Figure RE-812425DEST_PATH_IMAGE004
Line current of a certain group of lines in a hierarchy after unit time passes after control mode intervention control;
Figure RE-407355DEST_PATH_IMAGE022
is in the system control mode algorithm
Figure RE-934151DEST_PATH_IMAGE004
Compensating boost rates for a set of lines in a hierarchy
Figure RE-806292DEST_PATH_IMAGE012
Corresponding parameter limits;
(3) mode output correction amount control value:
Figure RE-629017DEST_PATH_IMAGE024
wherein:
Figure RE-DEST_PATH_IMAGE025
when it is not satisfied
Figure RE-39139DEST_PATH_IMAGE013
In the case of (3), after the system control mode intervenes in the control,in a system with output by operational analysis
Figure RE-244992DEST_PATH_IMAGE007
A certain group of lines in hierarchy corresponds to
Figure RE-96273DEST_PATH_IMAGE007
The first contained in the hierarchy
Figure RE-86970DEST_PATH_IMAGE008
A correction amount control value of one line;
Figure RE-656491DEST_PATH_IMAGE026
is in the system
Figure RE-400456DEST_PATH_IMAGE004
A certain group of lines in hierarchy corresponds to
Figure RE-106244DEST_PATH_IMAGE007
The first contained in the hierarchy
Figure RE-769307DEST_PATH_IMAGE008
A target power factor for the line;
Figure RE-DEST_PATH_IMAGE027
is in the system
Figure RE-530852DEST_PATH_IMAGE004
Target power factors for a set of lines of a hierarchy;
Figure RE-203141DEST_PATH_IMAGE028
is the adjustment stage number of the correction amount control value;
Figure RE-DEST_PATH_IMAGE029
the compensation amount is a compensation amount of the correction amount control value, and is related to the load and loss not included in the system.
8. An intelligent power filter control method, which is applied to the intelligent power filter control system according to any one of claims 1-7, the method comprising:
each level of power filtering compensation unit automatically and normally works, and each level of line state monitoring unit monitors the line state and the working effect of the power filtering compensation unit in real time;
when the system finds that the monitoring value meets the control mode starting condition, the system is subjected to intervention control, analysis is carried out through a mode control algorithm, then a corresponding correction control value is output through calculation, and control of a power filtering compensation unit between a corresponding level and a line is carried out;
each level of line state monitoring unit continues monitoring, new monitoring data are transmitted to the system, the system judges whether the condition of ending the intervention of the control mode is met, if not, the corresponding correction control value is calculated again to output for control; if the real-time monitoring state is reached, the system enters the real-time monitoring state again.
9. A computer-readable storage medium on which a computer program is stored, the program, when being executed by a processor, implementing the intelligent power filter control method according to claim 8.
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