CN113629722A - Load peak clipping control method for variable-frequency power equipment group - Google Patents
Load peak clipping control method for variable-frequency power equipment group Download PDFInfo
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- CN113629722A CN113629722A CN202110928667.8A CN202110928667A CN113629722A CN 113629722 A CN113629722 A CN 113629722A CN 202110928667 A CN202110928667 A CN 202110928667A CN 113629722 A CN113629722 A CN 113629722A
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- variable
- frequency power
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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
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
- H02J3/14—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by switching loads on to, or off from, network, e.g. progressively balanced loading
- H02J3/144—Demand-response operation of the power transmission or distribution network
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- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
- Y02B70/3225—Demand response systems, e.g. load shedding, peak shaving
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- 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
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
- Y04S20/222—Demand response systems, e.g. load shedding, peak shaving
-
- 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
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
- Y04S20/242—Home appliances
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention provides a load peak clipping control method for a variable frequency power equipment group, which comprises the following steps: (1): collecting total power; (2): judging whether the total power is greater than a reference value, if so, going to (3); no, to (1); (3): setting a cycle counter to be 1; setting the state variable matrix and the control frequency counter to be 0; (4): judging whether the loop counter is greater than the product of the maximum controlled times and the number of the equipment, if so, going to (12); no, to (5); (5): detecting the peak load moment; (6): detecting the equipment state; (7): calculating the reduction capacity, and selecting equipment operated at peak load; (8): load reduction before and after peak; (9): updating a state variable and a control frequency counter, and adding 1 to a cycle counter; (10): collecting total power; (11): judging whether the total power is greater than a reference value, if so, going to (4); no, to (12); (12): and outputting a load curve and a state variable matrix. The method can more economically and effectively reduce the load.
Description
Technical Field
The invention belongs to the technical field of power control, and particularly relates to a load peak clipping control method for a variable-frequency power equipment group.
Background
With the rapid development of economy, the power demand is also rapidly increased synchronously, and the use of household appliances further increases the power demand, so that the phenomenon of short supply and short demand of electric energy sometimes occurs.
The frequency converter is applied to power equipment, the power of the equipment can be flexibly adjusted, and the power can be adjusted in time when the load is too high, so that the power supply of important equipment is ensured. The invention provides a load peak clipping control method for a variable frequency power equipment group, which is characterized in that all state variables of the variable frequency power equipment are collected, and an economic optimal target control method and a reduction maximum target control method are respectively adopted, so that the load can be more economically and effectively reduced, and the stability of electric energy supply is ensured.
Disclosure of Invention
The invention provides a load peak clipping control method for a variable frequency power equipment group, which can more economically and effectively clip loads and ensure the stability of electric energy supply.
The invention specifically relates to a load peak clipping control method for a variable frequency power equipment group, which comprises the following steps:
step (1): collecting the total power of the variable-frequency power equipment group;
step (2): judging whether the total power is greater than a total power reference value, if so, entering the step (3); if not, returning to the step (1);
and (3): creating a cycle counter, a state variable matrix of the variable-frequency power equipment and a control frequency counter of the variable-frequency power equipment;
and (4): the circulation counter is set to be 1, and the variable matrix of the variable frequency power equipment and the control frequency counter of the variable frequency power equipment are set to be 0;
and (5): judging whether the cycle counter is larger than the product of the maximum controlled times of the variable-frequency power equipment and the number of the variable-frequency power equipment, if so, entering a step (14); if not, entering the step (6);
and (6): detecting and recording peak load time;
and (7): detecting the state of each variable frequency power device according to the state variable and the control frequency counter, and excluding the state of the variable frequency power device which is repeatedly operated or has reached the maximum controlled frequency;
and (8): calculating the reduction capacity of the variable-frequency power equipment, and selecting the variable-frequency power equipment which is operated in the peak load period according to the optimal economic efficiency or the maximum reduction target;
and (9): updating the load curve before and after the peak time
Load shedding over a long period of time;
step (10): updating the state variable of the variable-frequency power equipment and the control frequency counter of the variable-frequency power equipment;
step (11): adding 1 to the cycle counter;
step (12): re-collecting the total power of the variable-frequency power equipment group;
step (13): judging whether the total power is greater than the total power reference value, if so, returning to the step (5); if not, entering the step (14);
step (14): and outputting a load curve and the state variable matrix of the variable-frequency power equipment.
The optimal economic target is as follows: and calculating the product of the reduction capability of the variable-frequency power equipment and the corresponding electricity price, and finding the variable-frequency power equipment with the maximum product to operate in the peak-load period according to the sequence from high to low.
The maximum reduction target is as follows: and finding the variable frequency power equipment with the maximum reducing capability to operate in the peak load period according to the reducing capability of the variable frequency power equipment from high to low.
Compared with the prior art, the beneficial effects are: the load peak clipping control method collects all state variables of the variable-frequency power equipment, and better reduces the load by respectively adopting an economic optimal target control method and a reduction maximum target control method, so that the stability of power supply is ensured.
Drawings
Fig. 1 is a flowchart illustrating an optimal economic objective control method for load peak clipping control of a variable frequency power equipment group according to the present invention.
Fig. 2 is a flowchart illustrating a method for controlling peak clipping of a load of a group of variable frequency power equipment according to the present invention to achieve a maximum target of peak clipping amount.
Detailed Description
The following describes in detail a specific embodiment of a load peak clipping control method for a group of variable frequency power equipment according to the present invention with reference to the accompanying drawings.
The load peak reduction control method of the present invention includes a target control method with an economical optimum and a target control method with a maximum reduction amount,
as shown in fig. 1, the control method with the economic optimum target includes the steps of:
step (1): collecting the total power of the variable-frequency power equipment group;
step (2): judging whether the total power is greater than a total power reference value, if so, entering the step (3); if not, returning to the step (1);
and (3): creating a cycle counter, a state variable matrix of the variable-frequency power equipment and a control frequency counter of the variable-frequency power equipment;
and (4): the circulation counter is set to be 1, and the variable matrix of the variable frequency power equipment and the control frequency counter of the variable frequency power equipment are set to be 0;
and (5): judging whether the cycle counter is larger than the product of the maximum controlled times of the variable-frequency power equipment and the number of the variable-frequency power equipment, if so, entering the step (16); if not, entering the step (6);
and (6): detecting and recording peak load time;
and (7): detecting the state of each variable frequency power device according to the state variable and the control frequency counter, and excluding the state of the variable frequency power device which is repeatedly operated or has reached the maximum controlled frequency;
and (8): calculating the reduction capability of the variable-frequency power equipment;
and (9): calculating the product of the reduction capability of the variable-frequency power equipment and the corresponding electricity price;
step (10): sequencing the products in sequence from high to low, and finding out the frequency conversion power equipment with the maximum product to operate in a peak load period;
step (11): updating the load curve before and after the peak time
Load shedding over a long period of time;
step (12): updating the state variable of the variable-frequency power equipment and the control frequency counter of the variable-frequency power equipment;
step (13): adding 1 to the cycle counter;
step (14): re-collecting the total power of the variable-frequency power equipment group;
step (15): judging whether the total power is greater than the total power reference value, if so, returning to the step (5); if not, entering the step (16);
step (16): and outputting a load curve and the state variable matrix of the variable-frequency power equipment.
As shown in fig. 2, the maximum target control method with reduction amount includes the steps of:
step (1): collecting the total power of the variable-frequency power equipment group;
step (2): judging whether the total power is greater than a total power reference value, if so, entering the step (3); if not, returning to the step (1);
and (3): creating a cycle counter, a state variable matrix of the variable-frequency power equipment and a control frequency counter of the variable-frequency power equipment;
and (4): the circulation counter is set to be 1, and the variable matrix of the variable frequency power equipment and the control frequency counter of the variable frequency power equipment are set to be 0;
and (5): judging whether the cycle counter is larger than the product of the maximum controlled frequency of the variable-frequency power equipment and the number of the variable-frequency power equipment, if so, entering the step (15); if not, entering the step (6);
and (6): detecting and recording peak load time;
and (7): detecting the state of each variable frequency power device according to the state variable and the control frequency counter, and excluding the state of the variable frequency power device which is repeatedly operated or has reached the maximum controlled frequency;
and (8): calculating the reduction capability of the variable-frequency power equipment;
and (9): finding the variable frequency power equipment with the maximum reducing capability to operate in a peak load period according to the reducing capability of the variable frequency power equipment from high to low;
step (10): updating the load curve before and after the peak time
Load shedding over a long period of time;
step (11): updating the state variable of the variable-frequency power equipment and the control frequency counter of the variable-frequency power equipment;
step (12): adding 1 to the cycle counter;
step (13): re-collecting the total power of the variable-frequency power equipment group;
step (14): judging whether the total power is greater than the total power reference value, if so, returning to the step (5); if not, entering the step (15);
step (15): and outputting a load curve and the state variable matrix of the variable-frequency power equipment.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (3)
1. A load peak clipping control method for a variable frequency power equipment group is characterized by comprising the following steps:
step (1): collecting the total power of the variable-frequency power equipment group;
step (2): judging whether the total power is greater than a total power reference value, if so, entering the step (3); if not, returning to the step (1);
and (3): creating a cycle counter, a state variable matrix of the variable-frequency power equipment and a control frequency counter of the variable-frequency power equipment;
and (4): the circulation counter is set to be 1, and the variable matrix of the variable frequency power equipment and the control frequency counter of the variable frequency power equipment are set to be 0;
and (5): judging whether the cycle counter is larger than the product of the maximum controlled times of the variable-frequency power equipment and the number of the variable-frequency power equipment, if so, entering a step (14); if not, entering the step (6);
and (6): detecting and recording peak load time;
and (7): detecting the state of each variable frequency power device according to the state variable and the control frequency counter, and excluding the state of the variable frequency power device which is repeatedly operated or has reached the maximum controlled frequency;
and (8): calculating the reduction capacity of the variable-frequency power equipment, and selecting the variable-frequency power equipment which is operated in the peak load period according to the optimal economic efficiency or the maximum reduction target;
and (9): updating the load curve before and after the peak time
Load shedding over a long period of time;
step (10): updating the state variable of the variable-frequency power equipment and the control frequency counter of the variable-frequency power equipment;
step (11): adding 1 to the cycle counter;
step (12): re-collecting the total power of the variable-frequency power equipment group;
step (13): judging whether the total power is greater than the total power reference value, if so, returning to the step (5); if not, entering the step (14);
step (14): and outputting a load curve and the state variable matrix of the variable-frequency power equipment.
2. The method for controlling load peak clipping of the variable frequency power equipment group according to claim 1, wherein the optimal economic target is: and calculating the product of the reduction capability of the variable-frequency power equipment and the corresponding electricity price, sequencing the products in sequence from high to low, and finding the variable-frequency power equipment with the maximum product to operate in the peak load period.
3. The method as claimed in claim 1, wherein the maximum reduction amount is selected from the following targets: and sequencing the reducing capabilities of the variable-frequency power equipment from high to low, and finding out the variable-frequency power equipment with the maximum reducing capability to operate in a peak load period.
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| CN202110928667.8A CN113629722B (en) | 2021-08-13 | 2021-08-13 | Variable-frequency power equipment group load peak clipping control method |
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| CN202110928667.8A CN113629722B (en) | 2021-08-13 | 2021-08-13 | Variable-frequency power equipment group load peak clipping control method |
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Cited By (1)
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| CN114243681A (en) * | 2021-11-11 | 2022-03-25 | 深圳供电局有限公司 | Power utilization regulation and control method, device, equipment and storage medium for power system |
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