CN116826846A - Load control method and system suitable for high-permeability distributed power supply access control - Google Patents
Load control method and system suitable for high-permeability distributed power supply access control Download PDFInfo
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- CN116826846A CN116826846A CN202310925289.7A CN202310925289A CN116826846A CN 116826846 A CN116826846 A CN 116826846A CN 202310925289 A CN202310925289 A CN 202310925289A CN 116826846 A CN116826846 A CN 116826846A
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- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000010248 power generation Methods 0.000 claims abstract description 36
- 238000004891 communication Methods 0.000 claims abstract description 23
- 230000009471 action Effects 0.000 claims description 7
- 238000010295 mobile communication Methods 0.000 claims description 6
- 230000002159 abnormal effect Effects 0.000 claims description 5
- 238000011217 control strategy Methods 0.000 claims description 5
- 238000000418 atomic force spectrum Methods 0.000 claims description 3
- 230000008859 change Effects 0.000 claims description 3
- 230000007812 deficiency Effects 0.000 claims description 3
- 238000011156 evaluation Methods 0.000 claims description 3
- 230000035515 penetration Effects 0.000 claims description 2
- 230000008447 perception Effects 0.000 claims description 2
- 230000003993 interaction Effects 0.000 abstract description 3
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- 230000033228 biological regulation Effects 0.000 description 3
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- 230000035772 mutation Effects 0.000 description 2
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Classifications
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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
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
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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
- H02J3/003—Load forecast, e.g. methods or systems for forecasting future load demand
-
- 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
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
- H02J3/466—Scheduling the operation of the generators, e.g. connecting or disconnecting generators to meet a given demand
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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
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
-
- 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
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
- H02J2300/22—The renewable source being solar energy
- H02J2300/24—The renewable source being solar energy of photovoltaic origin
-
- 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
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
- H02J2300/28—The renewable source being wind energy
-
- 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
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/40—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation wherein a plurality of decentralised, dispersed or local energy generation technologies are operated simultaneously
Abstract
The invention discloses a load control system suitable for high-permeability distributed power supply access control, which comprises a novel load management system main station, a load control terminal, a distributed power supply and an intelligent control switch, wherein the load control system main station is connected with the load control terminal through a wide area communication network. A control method is also included. Aiming at the current situation that the permeability of the distributed power supply in the power grid is continuously improved, when the output of the distributed power supply is abnormally reduced, load control indexes can be distributed according to the running state of the power grid and the distributed power supply capacity of a user, the output is immediately reduced by controlling the adjustable load of the user, namely, a 'distributed power generation local spare capacity library' is established, so that the requirements on the spare capacity of the power grid and the load control of other users are reduced, the balance of the power consumption right and obligation of the distributed power supply is realized, the impact of the high-permeability distributed power supply on the power grid is reduced, and the friendly interaction of the power grid and the power consumption of the distributed power supply can be better promoted.
Description
Technical Field
The invention belongs to the technical field of operation control of power systems, and particularly relates to a load control method and system suitable for high-permeability distributed power supply access control.
Background
From the supply side, the construction of novel power systems is gradually accelerated, the renewable energy source access proportion is gradually improved, and the uncertainty of output brings great challenges to the balance of power supply and demand. The complex and changeable supply and demand situation brings higher requirements to the power balance means, the regulation mode of the traditional power system 'source follow-up' can not meet the requirements, the 'source-load interaction' is comprehensively made, and the management value of the power demand side is better and better exerted.
At present, the control on the power demand side mainly depends on means such as orderly power consumption, demand response, a load control system and the like to carry out load adjustment, but the following problems exist: firstly, the branch control capability of a plurality of installed load control terminals on the internal load of a user is insufficient, a control loop is not established on a user switch, a large amount of loads are not controlled and are not accurately controlled, and the following problems are caused: firstly, the method can only be carried out on site by means of a client manager and government personnel, and the management and control investment is large; secondly, the shunt control cannot be performed, if the shunt control is still not performed after supervision, the private line client is stopped by dispatching, the private transformer client is stopped by government and enterprise joint law enforcement and lawns, and the power outage loss of the user is large; finally, due to production process limitation, even if the power grid is short-time-limited, the non-power-limiting period cannot be produced, and the influence on the operation activity is large; secondly, distributed power generation is rapidly increased, and the output condition of the distributed power generation is difficult to collect and monitor because of the fact that most of the distributed power generation is 'spontaneous and self-use and residual power is online' and the distributed power generation is distributed in a user, and the output condition of the distributed power generation cannot be accurately mastered. At present, the power grid load control is mainly of a day-ahead scale, if the power generation output is suddenly reduced due to extreme conditions such as weather mutation, the spare capacity of the power generation side cannot respond in time to trigger the low-frequency load shedding action, and a large-area power failure accident is caused.
Therefore, in consideration of insufficient monitoring, obvious intermittent and rapid growth of the characteristics of the distributed power supply, the accuracy of predicting the output of the distributed power supply and the accuracy of controlling the internal load are needed to be improved when the power grid fully absorbs the distributed power generation, so that the accuracy and timeliness of controlling the load of the power grid are improved.
Disclosure of Invention
The invention aims to provide a load control method and a system suitable for high-permeability distributed power access control so as to solve the problems in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions: the load control method suitable for high-permeability distributed power supply access control comprises the following steps:
s1: the load control main station and the wide area communication network send weather forecast data to the load control terminal;
s2: the load control terminal predicts the output day-ahead of the distributed power supply according to the connected output characteristic model of the distributed power supply to form a day-ahead predicted power curve P F ；
S3: the load control terminal collects the power generation power P of the distributed power supply in real time G And P is transmitted through a wide area communication network G Uploading to a load control system main station;
s4: the load control terminal interval is 15min to predict the power curve P before the day F Power generation P of distributed power supply G Sending the difference value into a comparator to obtain a difference value;
s5: the load control terminal calculates the power grid frequency in real time through the alternating current power supply, and when the power grid frequency drops to a configured action threshold value, the intelligent switch is automatically controlled according to a pre-configured action strategy;
s6: the load control main station predicts daily load, when the power supply capacity is insufficient due to abnormal weather change, the load control proportion of the distributed power supply users is determined according to the load deficiency proportion, and the proportion value is issued to the distributed power supply user load control terminal;
s7: the load control terminal determines the load P to be reduced according to the issued load control proportion and the power generation output difference value in the step S4 c ；
S8: the load control terminal regulates and controls the accessed load control switch according to the load control target in the step S6;
s9: the load control system master station carries out load control evaluation through an adjustable load power curve sent by the load control terminal.
Preferably, in step S4, a force curve is predicted from the issued weather prediction data and the locally stored distributed power generation characteristic model, and compared with the measured power.
In any of the above schemes, it is preferable that in step S7, according to the load adjustment coefficient issued by the master station, in combination with the local distributed generation output difference and frequency sensing, whether to start the local load control and the load control target is determined.
The load control system suitable for high-permeability distributed power supply access control comprises a novel load management system main station, a load control terminal, a distributed power supply and an intelligent control switch;
the load control system main station is connected with the load control terminal through a wide area communication network, and the load control terminal is connected with the distributed power supply and the intelligent control switch through a local communication network.
In any of the above schemes, preferably, the novel load management system master station comprises a distributed power management module, an adjustable load management module and a load control execution module, wherein the distributed power management module of the load control system master station is used for collecting the day-ahead power generation output prediction and 15-minute real-time power generation output data of the distributed power supply inside the user; the adjustable load acquisition module of the load control system main station is used for acquiring 15-minute real-time power data of the adjustable load inside a user; the load control strategy algorithm module of the load control system master station can receive the scheduled load adjustment instruction, decompose the instruction and finally issue the adjustment instruction to the user load control terminal.
In any of the above schemes, preferably, the wide area communication network includes channels such as a 230MHz private line, a Virtual Private Network (VPN) for mobile communication, and a public mobile communication network, and is responsible for establishing a security channel between a novel load management system master station and a load control terminal.
In any of the above schemes, preferably, the load control terminal includes a distributed power management module, an adjustable load management module, a load control instruction receiving module, and a load control policy management module, where the distributed power management module of the load control terminal can predict distributed power output, collect actual output, and send prediction and monitoring data to the master station; the adjustable load management module of the load control terminal can collect the operation data of the adjustable load and issue a control instruction to the intelligent control switch; the load control instruction receiving module of the load control terminal can receive a load control instruction issued by a load control system master station through a wide area communication network; the load control policy management module of the load control terminal may configure a control combination and timing of the adjustable load.
Preferably in any of the above schemes, the local communication network comprises ethernet, fieldbus, etc.
In any of the above schemes, preferably, the distributed power supply refers to a distributed power generation facility which is connected to a feeder network inside a user and cannot be scheduled and managed by scheduling, and the distributed power supply comprises facilities such as distributed photovoltaic, wind power, self-provided generator sets and the like, and the grid connection point of the distributed power supply is provided with a measuring device.
In any of the above schemes, preferably, the intelligent control switch includes devices such as an intelligent breaker and an electrical equipment control protocol converter, and the load control terminal is connected to the upper part through a local communication network, so that automatic operations such as switching and adjusting of the electrical equipment can be realized.
The invention has the technical effects and advantages that: according to the load control method and the load control system for the access control of the high-permeability distributed power supply, aiming at the current situation that the permeability of the distributed power supply in a power grid is continuously improved, when the output of the distributed power supply is abnormally reduced, load control indexes can be distributed according to the running state of the power grid and the distributed power supply capacity of a user, the output is immediately reduced by controlling the adjustable load of the user, namely, a 'local spare capacity library of distributed power generation' is established, so that the requirements on the spare capacity of the power grid and the load control of other users are reduced, the balance of the power consumption right and the obligation of the distributed power supply is realized, the impact of the access of the high-permeability distributed power supply to the power grid is reduced, and the friendly interaction of the power grid and the power consumption of the distributed power supply can be better promoted.
Drawings
FIG. 1 is a diagram of the overall architecture of a novel load management system adapted to high-permeability distributed power access management and control in accordance with the present invention;
FIG. 2 is a flow chart of the novel load control method of the present invention for adapting to high penetration distributed power access management.
Detailed Description
The following describes the embodiments of the present invention further with reference to the drawings. The description of these embodiments is provided to assist understanding of the present invention, but is not intended to limit the present invention. In addition, the technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
Example 1:
the invention provides a load control system which is shown in figure 1 and is suitable for high-permeability distributed power access control, comprising a novel load management system main station, a load control terminal, a distributed power supply and an intelligent control switch;
the load control system master station is connected with the load control terminal through a wide area communication network, the load control terminal is connected with a distributed power supply and an intelligent control switch through a local communication network, the wide area communication network comprises channels such as a power 230MHz special line, a mobile communication Virtual Private Network (VPN), a public mobile communication network and the like, and is responsible for establishing a safety channel between the novel load control system master station and the load control terminal, and the local communication network comprises an Ethernet, a field bus and the like;
the novel load management system master station comprises a distributed power management module, an adjustable load management module and a load control execution module, wherein the distributed power management module of the load control system master station is used for collecting the daily power generation output prediction and 15-minute real-time power generation output data of a user internal distributed power supply; the adjustable load acquisition module of the main station of the load control system is used for acquiring 15-minute real-time power data of the adjustable load in the user; the load control strategy algorithm module of the load control system master station can receive the scheduled load adjustment instruction, decompose the instruction and finally issue the adjustment instruction to the user load control terminal; the load control terminal comprises a distributed power supply management module, an adjustable load management module, a load control instruction receiving module and a load control strategy management module, wherein the distributed power supply management module of the load control terminal can predict the output of the distributed power supply, collect the actual output and send the predicted and monitored data to the master station; the adjustable load management module of the load control terminal can collect the operation data of the adjustable load and issue a control instruction to the intelligent control switch; the load control instruction receiving module of the load control terminal can receive a load control instruction issued by a load control system main station through a wide area communication network; the load control strategy management module of the load control terminal can be configured with a control combination and a time sequence of an adjustable load, the distributed power supply refers to a distributed power generation facility which is accessed into a feeder network in the user and cannot be scheduled and managed by scheduling, the distributed power generation facility comprises facilities such as distributed photovoltaic, wind power, self-provided generator sets and the like, and a grid-connected point of the distributed power generation facility is provided with a measuring device;
the intelligent control switch comprises an intelligent circuit breaker, an electrical equipment control protocol converter and other equipment, and is connected with a load control terminal through a local communication network, so that automatic operations such as switching and adjusting of the electrical equipment can be realized.
Example 2:
the embodiment provides a load control method suitable for high-permeability distributed power supply access control, which comprises the following steps:
s1: the load control main station and the wide area communication network send weather forecast data to the load control terminal;
s2: the load control terminal predicts the output day-ahead of the distributed power supply according to the connected output characteristic model of the distributed power supply to form a day-ahead predicted power curve P F ；
S3: the load control terminal collects the power generation power P of the distributed power supply in real time G And P is transmitted through a wide area communication network G Uploading to a load control system main station;
s4: the load control terminal interval is 15min to predict the power curve P before the day F Power generation P of distributed power supply G Sending the difference value into a comparator to obtain a difference value;
s5: the load control terminal calculates the power grid frequency in real time through the alternating current power supply, and when the power grid frequency drops to a configured action threshold value, the intelligent switch is automatically controlled according to a pre-configured action strategy;
s6: the load control main station predicts daily load, when the power supply capacity is insufficient due to abnormal weather change, the load control proportion of the distributed power supply users is determined according to the load deficiency proportion, and the proportion value is issued to the distributed power supply user load control terminal;
s7: the load control terminal determines the load P to be reduced according to the issued load control proportion and the power generation output difference value in the step S4 c ；
S8: the load control terminal regulates and controls the accessed load control switch according to the load control target in the step S6;
s9: the load control system master station carries out load control evaluation through an adjustable load power curve sent by the load control terminal.
In step S4, a force curve is predicted according to the issued weather prediction data and the locally stored distributed power generation characteristic model, and compared with the measured power.
In step S7, according to the load adjustment coefficient issued by the master station, in combination with the local distributed power generation output difference and frequency perception, it is determined whether to start the local load control and the load control target.
In the using process of the load control method and the system for adapting to the high-permeability distributed power supply access control, as shown in fig. 2, the specific flow is as follows: firstly, a load control system master station communicates with a load control terminal installed on a distributed power supply user through a wide area network to obtain output prediction data of each distributed power supply; secondly, interacting with a power grid dispatching system, and further analyzing whether the load is abnormally increased due to weather mutation and other reasons according to load prediction and power generation output data if a power supply gap occurs, so that the power generation plan adjustment cannot meet the load demand; finally, according to the influence degree of abnormal decline of the distributed power generation output, a regulation and control coefficient is issued to the standby adjustable load of the distributed power supply user; the negative control terminal controls the adjustable load according to the issued regulation and control coefficient, and the power supply gap caused by abnormal drop of distributed power generation is relieved.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Claims (10)
1. The load control method adapting to the high-permeability distributed power supply access control is characterized by comprising the following steps of: the method comprises the following steps:
s1: the load control main station and the wide area communication network send weather forecast data to the load control terminal;
s2: the load control terminal predicts the output day-ahead of the distributed power supply according to the connected output characteristic model of the distributed power supply to form a day-ahead predicted power curve P F ；
S3: the load control terminal collects the power generation power P of the distributed power supply in real time G And P is transmitted through a wide area communication network G Uploading to a load control system main station;
s4: the load control terminal interval is 15min to predict the power curve P before the day F Power generation P of distributed power supply G Sending the difference value into a comparator to obtain a difference value;
s5: the load control terminal calculates the power grid frequency in real time through the alternating current power supply, and when the power grid frequency drops to a configured action threshold value, the intelligent switch is automatically controlled according to a pre-configured action strategy;
s6: the load control main station predicts daily load, when the power supply capacity is insufficient due to abnormal weather change, the load control proportion of the distributed power supply users is determined according to the load deficiency proportion, and the proportion value is issued to the distributed power supply user load control terminal;
s7: the load control terminal determines the load P to be reduced according to the issued load control proportion and the power generation output difference value in the step S4 c ；
S8: the load control terminal regulates and controls the accessed load control switch according to the load control target in the step S6;
s9: the load control system master station carries out load control evaluation through an adjustable load power curve sent by the load control terminal.
2. The load control method for adapting to high-permeability distributed power access management according to claim 1, wherein: in step S4, a force curve is predicted according to the issued weather prediction data and the locally stored distributed power generation characteristic model, and compared with the measured power.
3. The load control method and system for adapting to high-permeability distributed power access control according to claim 1, wherein the load control method and system are characterized in that: in step S7, according to the load adjustment coefficient issued by the master station, in combination with the local distributed power generation output difference and frequency perception, it is determined whether to start the local load control and the load control target.
4. A load control system adapted for high penetration distributed power access management according to any one of claims 1-3, wherein: the system comprises a novel load management system main station, a load control terminal, a distributed power supply and an intelligent control switch;
the load control system main station is connected with the load control terminal through a wide area communication network, and the load control terminal is connected with the distributed power supply and the intelligent control switch through a local communication network.
5. The load control method and system for adapting to high-permeability distributed power access control according to claim 4, wherein the load control method and system are characterized in that: the novel load management system master station comprises a distributed power management module, an adjustable load management module and a load control execution module.
6. The load control method and system for adapting to high-permeability distributed power access control according to claim 4, wherein the load control method and system are characterized in that: the wide area communication network comprises a power 230MHz special line, a mobile communication virtual special network and a public mobile communication network channel.
7. The load control method and system for adapting to high-permeability distributed power access control according to claim 4, wherein the load control method and system are characterized in that: the load control terminal comprises a distributed power supply management module, an adjustable load management module, a load control instruction receiving module and a load control strategy management module.
8. The load control method and system for adapting to high-permeability distributed power access control according to claim 4, wherein the load control method and system are characterized in that: the local communication network comprises an ethernet, a field bus.
9. The load control method and system for adapting to high-permeability distributed power access control according to claim 4, wherein the load control method and system are characterized in that: the distributed power supply comprises a distributed photovoltaic, wind power and self-contained generator set, and a grid connection point of the distributed power supply is provided with a measuring device.
10. The load control method and system for adapting to high-permeability distributed power access control according to claim 4, wherein the load control method and system are characterized in that: the intelligent control switch comprises an intelligent circuit breaker and an electrical equipment control protocol converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310925289.7A CN116826846A (en) | 2023-07-25 | 2023-07-25 | Load control method and system suitable for high-permeability distributed power supply access control |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310925289.7A CN116826846A (en) | 2023-07-25 | 2023-07-25 | Load control method and system suitable for high-permeability distributed power supply access control |
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| CN116826846A true CN116826846A (en) | 2023-09-29 |
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| CN202310925289.7A Withdrawn CN116826846A (en) | 2023-07-25 | 2023-07-25 | Load control method and system suitable for high-permeability distributed power supply access control |
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| Country | Link |
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| CN (1) | CN116826846A (en) |
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2023
- 2023-07-25 CN CN202310925289.7A patent/CN116826846A/en not_active Withdrawn
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