CN111697594A - Demand response control method, system and equipment for limiting load reduction rate of power grid - Google Patents
Demand response control method, system and equipment for limiting load reduction rate of power grid Download PDFInfo
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- H—ELECTRICITY
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- H—ELECTRICITY
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- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
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- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
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Abstract
The embodiment of the invention relates to a demand response control method, a system and equipment for limiting the load reduction rate of a power grid, which receive demand response information from the power grid, calculate the priority of the equipment participating in the demand response and the load reduction rate threshold value in the power grid system, the control method, the system and the equipment of the demand response can ensure that the demand response is executed in a certain range under the condition that the load reduction rate of the equipment is lower than the load reduction rate threshold value during the interruption period until the demand response power requirement is met, improve the pressure of sudden load drop caused by automatic demand response on the safe operation of a power grid, also consider the power demand of a user and the demand of the power grid on the power supply and demand balance, and also solve the problem of power consumption load curve condition in the demand side management of the power grid, the technical problem that the power grid cannot normally run due to unbalance of the power grid caused by the fact that a generator set of the power grid cannot adjust the sudden drop capability is solved.
Description
Technical Field
The invention relates to the technical field of intelligent power grid management, in particular to a demand response control method, system and device for limiting the load reduction rate of a power grid.
Background
The smart grid is the development direction of the future power grid, and the demand response is one of important technologies in the smart grid technology. With the continuous promotion of intelligent power grid construction and the continuous rising of electricity consumption at the resident side, large power grid peak load is easily generated in winter and summer, and the influence of the difference between the peak load and the valley load on the stable operation of a power grid is increased. The demand response can reduce or push the power load of a certain period of time, reduce the peak-valley difference, and ensure the power supply stability in the smart grid.
Compared with foreign countries, the demand response technology of China starts late, and the operation of pilot projects is performed in part of provinces and cities, so that good application effects are obtained, for example: taking Jiangsu as an example, from 2002 to 2004, Jiangsu reduces the switching-off and power limiting by 90% through demand side management, and ensures stable power supply of the smart grid.
Research on demand response is well established, but new problems arise. If a user acquires demand response information of the power grid to participate in demand response to obtain price advantage or incentive, a large number of users may interrupt the participation of the power utilization equipment in demand response at the same time within a period of time after the demand response starts, so that a power utilization load curve is suddenly reduced. The climbing rate of the generator set of the existing intelligent power grid represents the load ascending and descending capacity of the generator set, the numerical value is limited, and if the power load curve suddenly drops and exceeds the regulating capacity of the climbing rate of the generator set, the power grid is easily unbalanced, and the normal operation of the power grid is influenced.
Disclosure of Invention
The embodiment of the invention provides a demand response control method, system and device for limiting the load reduction rate of a power grid, and aims to solve the technical problem that power grid unbalance cannot normally operate due to the fact that a power load curve condition occurs in demand side management of the power grid and a generator set of the power grid cannot adjust the sudden reduction capacity.
In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:
a demand response control method for limiting the load reduction rate of a power grid comprises the following steps:
s1, acquiring data information of power grid demand response, wherein the data information comprises demand response information and information of response-participatable equipment;
s2, acquiring the working power of each participatory demand response device from the participatory demand response device information according to the demand response information and participatory demand response devices;
s3, calculating a load reduction rate threshold of the power grid according to the set demand response delay time;
s4, sequencing the participation demand response devices which do not execute demand response according to the priority evaluation index to obtain a sequenced participation device set and a participation device with the highest priority;
step S5, judging whether the participant equipment with the highest priority level in the participant equipment set executes the demand response or not under the condition of meeting the demand response, if so, executing the demand response by the participant equipment, interrupting the participant equipment, removing the participant equipment, and executing step S6; if not, the step S5 is executed repeatedly;
s6, if the sum of the working powers of all the participating devices which execute the demand response is larger than the power reduction required power of the demand response information, the demand response is finished; if the sum of the operating powers of all the participating devices that have performed the demand response is not greater than the power required for power reduction of the demand response information, performing step S2;
wherein the demand response information includes a start time, an end time, and a power required for power reduction of the demand response.
Preferably, the demand response condition includes:
the moment when the participating device executes the demand response is between the start time and the end time of the demand response;
selecting the participating equipment with the highest priority from the participating equipment set, and calculating the load reduction rate of the participating equipment with the highest priority, wherein the load reduction rate of the participating equipment with the highest priority is not greater than the load reduction rate threshold;
the sum of the operating power of all participating devices in the set that have been interrupted is less than the power required for the power reduction.
Preferably, the load reduction rate A of the highest priority participating device is calculatedjThe formula of (1) is:
in the formula, the participating device with the highest priority level is selected from the participating device set, and the number of the participating device is j and PjTo select the operating power of the participating device with the highest priority, t is the time when the participating device executes the demand response, tkThe moment when the participating devices perform the demand response for the kth time.
Preferably, the formula for calculating the load shedding rate threshold a is:
in the formula, PDRTo reduce the required power, Δ tDRThe demand response delay time is the time taken from the start time of the demand response to the completion of the demand response.
Preferably, the priority evaluation index of each participating demand response device is obtained according to a device priority index calculation formula.
Preferably, the device priority index riThe calculation formula is as follows: r isi＝aNi-bKi(ii) a In the formula, NiIs a user comfort index, K, of the deviceiThe price factor index of the equipment is shown, wherein a and b are constants, and i is the number of the equipment.
Preferably, the user comfort index N of the device is calculated according to the type of participating demand-response deviceiThe method specifically comprises the following steps:
determining whether the participating demand response devices are maintaining temperatureIf the equipment is the same, the user comfort level index NiThe calculation formula of (2) is as follows:
if not, the user comfort level index NiThe calculation formula of (2) is as follows:
in the formula, TsetOptimum temperature, T, for participating in the operation of demand-responsive equipmentminAnd TmainFor the minimum and maximum values of the temperature of the participating demand-responsive devices, TnowA current temperature of operation for the participating demand response device; t is tworkTotal working time t of participating demand response equipment under the condition of not participating demand responsetotalEstimated total time of operation, t ', for participating demand response devices without participating in demand response'workIs total time of operation, t ', of participating demand response devices on precondition of participating demand responses'totalAnd predicting the total working time of the participating demand response equipment on the premise of participating the demand response.
Preferably, the price factor index K of the device is calculatediIs Ki＝(Z-ZDR)*PiWherein Z is the electricity price without requiring response, ZDRFor electricity prices in the demand response phase, PiThe operating power of the participating demand response devices numbered i.
The embodiment of the invention also provides a demand response control system for limiting the load reduction rate of a power grid, which comprises a data acquisition unit, an equipment power data acquisition unit, a threshold calculation unit, a sorting unit, a first judgment unit and a second judgment unit;
the data acquisition unit is used for acquiring data information of power grid demand response, and the data information comprises demand response information and response-participatable equipment information;
the device power data acquisition unit is used for acquiring the working power of each participatory demand response device from the participatory demand response device information according to the demand response information and the participatory demand response device;
the threshold value calculating unit is used for calculating the load reduction rate threshold value of the power grid according to the set demand response delay time;
the sequencing unit is used for sequencing the participation demand response equipment which does not execute demand response according to the priority evaluation index to obtain a sequenced participation equipment set and the participation equipment with the highest priority;
the first judging unit is used for judging whether the participating equipment with the highest priority in the participating equipment set executes the demand response or not according to the condition that the demand response is met, and judging whether other participating equipment executes the demand response again if the participating equipment does not execute the demand response;
the second judging unit is configured to execute a demand response for the participating device according to the result of the first judging unit, interrupt and remove the participating device, and then end the demand response if the sum of the operating powers of all the participating devices that have executed the demand response is greater than the power reduction required power of the demand response information; and if the sum of the working power of all the participating devices which have executed the demand response is not greater than the power required by the power reduction of the demand response information, reordering the devices which need to participate in the response.
The invention also provides a device comprising a processor and a memory;
the memory is used for storing program codes and transmitting the program codes to the processor;
the processor is used for executing the demand response control method for limiting the load reduction rate of the power grid according to the instructions in the program codes.
According to the technical scheme, the embodiment of the invention has the following advantages:
1. the demand response control method for limiting the load reduction rate of the power grid judges whether to execute equipment demand response or not under the condition of meeting demand response requirements, can enable the demand response to be executed within a certain range at the load reduction rate of the power grid, improves the pressure of load sudden drop caused by automatic demand response on safe operation of the power grid, also considers the power demand of a user and the demand of the power grid on power supply and demand balance, and also solves the technical problems that the power load curve condition occurs in the demand side management of the power grid, and the power grid unbalance cannot normally operate due to the fact that a generator set of the power grid cannot adjust the sudden drop capacity.
2. The demand response control system for limiting the load reduction rate of the power grid acquires data through the data acquisition unit and the equipment power data acquisition unit, and processes the acquired data through the threshold calculation unit and the sequencing unit, so that the first judgment unit judges whether the equipment executes demand response or not under the demand response requirement condition according to the processed data, the demand response control system can enable the demand response to be executed within a certain range at the load reduction rate of the power grid, the pressure of sudden load reduction caused by automatic demand response on the safe operation of the power grid is improved, and the power demand of a user and the demand of the power grid on the power supply and demand balance are both considered; the technical problem that power load curve sudden conditions occur in demand side management of a power grid, and a power generating set of the power grid cannot adjust sudden drop capacity to cause power grid unbalance and abnormal operation is solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a flowchart illustrating steps of a demand response control method for limiting a load shedding rate of a power grid according to an embodiment of the present invention.
Fig. 2 is a block diagram of a demand response control system for limiting a load shedding rate of a power grid according to an embodiment of the present invention.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the application provides a demand response control method, system and device for limiting load reduction rate of a power grid, and is used for solving the technical problem that power grid unbalance cannot normally operate due to the fact that a power load curve condition occurs in demand side management of the power grid and a generator set of the power grid cannot adjust the sudden reduction capacity.
The first embodiment is as follows:
fig. 1 is a flowchart illustrating steps of a demand response control method for limiting a load shedding rate of a power grid according to an embodiment of the present invention.
As shown in fig. 1, an embodiment of the present invention provides a demand response control method for limiting a load shedding rate of a power grid, including the following steps:
s1, acquiring data information of power grid demand response, wherein the data information comprises demand response information and information of response-participatable equipment;
s2, acquiring the working power of each participatory demand response device from the participatory demand response device information according to the demand response information and the participatory demand response device;
s3, calculating a load reduction rate threshold of the power grid according to the set demand response delay time;
s4, sequencing the participation demand response devices which do not execute demand response according to the priority evaluation index to obtain a sequenced participation device set and a participation device with the highest priority;
step S5, judging whether the participating equipment with the highest priority in the participating equipment set executes the demand response or not under the condition of meeting the demand response, if so, executing the demand response by the participating equipment, interrupting the participating equipment and removing the participating equipment, and executing step S6; if not, the step S5 is executed repeatedly;
s6, if the sum of the working powers of all the participating devices which have executed the demand response is greater than the power reduction required by the power of the demand response information, the demand response is finished; if the sum of the operating powers of all the participating devices that have performed the demand response is not greater than the power required for power reduction of the demand response information, performing step S2;
wherein the demand response information includes a start time, an end time, and a power required for power reduction of the demand response.
In step S1 of the embodiment of the present invention, the demand response information of the grid demand response is obtained mainly by the grid company, and the participatory response device information of the grid demand response is obtained mainly by extracting data from the load control system of the grid.
It should be noted that the information about the participatory response device includes the operating power of the device, the name of the device, and the number of the device. In this embodiment, the devices included in the response device information may be numbered, where the set of device numbers is N ═ 1, 2. The demand response information includes the start time t of the demand responsestartEnd time tendPower required for power reduction PDRAnd electricity price Z during demand responseDR。
In step S2 of the embodiment of the present invention, a participating demand response device is selected from devices in the information of the participatory response device according to the demand response information, that is, a device participating in the current demand response is selected according to the demand response information and recorded as a participating demand response device. Wherein operational power data of the respective devices in response to this demand is also extracted from the participatable responsive device information.
It should be noted that the screened participating demand response devices are numbered, M is a number set of participating demand response devices, the participating demand response devices are divided into non-executing demand response devices and executing demand response devices, the number set of the non-executing demand response devices is denoted as M, and the number set of the executing demand response devices is n. Wherein M ═ M ≦ n.
In step S3 of the embodiment of the present invention, the method mainly calculates the load shedding rate threshold of the power grid, and provides a condition basis for the determination in step S5.
In step S4 of the embodiment of the present invention, the priority evaluation index is mainly calculated for the unexecuted demand response devices in all the participating demand response devices, and then all the unexecuted demand response devices are ranked from high to low according to the priority evaluation index to obtain the participating device set and obtain the participating device with the highest priority, where the device ranking number of the participating device set starts from 1, that is, the participating devices in the participating device set with the highest priority are recorded as ranki1, i ∈ m, where i is the number of the participating device in the set of participating devices.
It should be noted that only the participating device with the highest priority is determined, and only one participating device is determined at a time.
In step S5 of the embodiment of the present invention, it is mainly determined whether the participating device with the highest priority in the participating device set executes the demand response according to the condition of the demand response, and if the participating device satisfies the condition of the demand response, the participating device executes the demand response and is interrupted after the demand response, and the sets m and n are updated and recorded as m 'and n'. If the participating device does not meet the condition of demand response, the participating device does not execute demand response, and the determination is made again according to the condition of demand response in step S5.
In step S6 of the embodiment of the present invention, it is mainly to determine whether the current demand response is finished or continued.
In addition, according to
This formula determines whether the condition decides to end the demand response or to re-execute steps S2 to S6 according to the updated participating demand response devices,
sum of the operating powers, P, of all participating device sets n' that have performed a demand responseDRThe required power is reduced for power.
The demand response control method for limiting the load reduction rate of the power grid judges whether to execute equipment demand response or not under the condition of meeting the demand response requirement, can enable the demand response to be executed within a certain range at the load reduction rate of the power grid, improves the pressure of load sudden drop caused by automatic demand response on safe operation of the power grid, gives consideration to the power demand of users and the demand of the power grid on power supply and demand balance, and solves the technical problems that power load curve conditions occur in demand side management of the power grid, and a generator set of the power grid cannot adjust the sudden drop capacity, so that the power grid is unbalanced and cannot normally operate.
It should be noted that the demand response control method for limiting the load reduction rate of the power grid receives demand response information from the power grid, comprehensively considers the influence of user comfort and price factors by combining the demand response information, and calculates the priority of the participating demand response equipment; calculating a load reduction rate threshold value in the power grid system, selecting the participating equipment with the highest priority level each time to execute demand response, and ensuring that the real-time load reduction rate of the equipment is lower than the load reduction rate threshold value during interruption until the demand response power requirement is met; therefore, the pressure of sudden load drop caused by demand response on safe operation of the power grid is improved, and the power demand of a user and the demand of the power grid on power supply and demand balance are both considered.
In one embodiment of the present invention, the formula for calculating the load shedding rate threshold a is:
in the formula, PDRTo reduce the required power, Δ tDRThe demand response delay time is the time taken from the start time of the demand response to the completion of the demand response.
In one embodiment of the invention, the demand response conditions include:
the moment when the participating device executes the demand response is between the start time and the end time of the demand response;
selecting the participating equipment with the highest priority from the participating equipment set, calculating the load reduction rate of the participating equipment with the highest priority, wherein the load reduction rate of the participating equipment with the highest priority is smaller than a load reduction rate threshold;
the sum of the operating power of all participating devices in the set that have been interrupted is less than the power required for the power reduction.
In an embodiment of the invention, the load reduction rate A of the highest priority participating device is calculatedjThe formula of (1) is:
in the formula, the participating device with the highest priority is selected from the participating device set, and the number of the participating device is j, PjTo select the operating power of the participating device with the highest priority, t is the time when the participating device executes the demand response, tkThe moment when the participating devices perform the demand response for the kth time. Wherein, when k is 0, i.e., t0＝tstart-1。
It should be noted that, the time when the participating device executes the demand response is denoted as t, tstart<t<tend(ii) a The participating device with the highest priority is mainly selected from the non-execution demand response devices, the load reduction rate of the participating device with the highest priority is calculated, and A is judgedjWhether or not it is not greater than A. The sum of the power of all executed demand-responsive devices in the participating demand-responsive devices is less than the power required for the power reduction, i.e. is
The conditions that need to be satisfied by the devices performing the demand response are: the moment when the participating device executes the demand response is denoted as t, tstart<t<tend，Aj≤A，
The three conditions are satisfied simultaneously, the device executes the demand response, the device executing the demand response is interrupted, and k is k +1, tk＝t。
In an embodiment of the present invention, the priority evaluation index of each of the participating demand response devices is obtained according to a device priority index calculation formula.
In an embodiment of the invention, the device priority index riThe calculation formula is as follows: r isi＝aNi-bKi(ii) a In the formula, NiIs a user comfort index, K, of the deviceiThe price factor index of the equipment is shown, wherein a and b are constants, and i is the number of the equipment.
A and b are constants and determined according to the influence of two indexes, namely a price factor index and a user comfort index, on a user using the equipment. Specifically, if the user comfort index has a large impact on the user using the device, a is 0.8 and b is 0.2; if the price factor index has great influence on the user using the equipment, a is 0.2, and b is 0.8; if the two indexes, i.e., the user comfort index and the price factor index, have the same effect, a is 0.5 and b is 0.5. The smaller the priority index of the equipment is, the higher the priority level of the equipment is, and the equipment is judged according to the priority level of the equipment from high to low.
In an embodiment of the invention, a user comfort index N for a device is calculated based on the type of participating demand response deviceiThe method specifically comprises the following steps:
judging whether the equipment participating in the demand response is equipment maintaining the temperature, if so, judging the comfort level index N of the useriThe calculation formula of (2) is as follows:
if not, the user comfort level index NiThe calculation formula of (2) is as follows:
in the formula, TsetOptimum temperature, T, for participating in the operation of demand-responsive equipmentminAnd TmainFor the minimum and maximum values of the temperature of the participating demand-responsive devices, TnowA current temperature of operation for the participating demand response device; t is tworkTotal working time t of participating demand response equipment under the condition of not participating demand responsetotalEstimated total time of operation, t ', for participating demand response devices without participating in demand response'workIs total time of operation, t ', of participating demand response devices on precondition of participating demand responses'totalAnd predicting the total working time of the participating demand response equipment on the premise of participating the demand response.
In an embodiment of the invention, a price factor index K of a device is calculatediIs Ki＝(Z-ZDR)*PiWherein Z is the electricity price without requiring response, ZDRFor electricity prices in the demand response phase, PiThe operating power of the participating demand response devices numbered i.
Example two:
fig. 2 is a block diagram of a demand response control system for limiting a load shedding rate of a power grid according to an embodiment of the present invention.
As shown in fig. 2, an embodiment of the present invention further provides a demand response control system for limiting a load reduction rate of a power grid, which includes a data obtaining unit 10, an apparatus power data obtaining unit 20, a threshold calculating unit 30, a sorting unit 40, a first determining unit 50, and a second determining unit 60;
the data acquisition unit 10 is used for acquiring data information of power grid demand response, wherein the data information comprises demand response information and response-participatable equipment information;
the device power data acquisition unit 20 is configured to acquire the operating power of each participatory demand response device from the participatory demand response device information according to the demand response information and the participatory demand response device;
the threshold value calculating unit 30 is used for calculating a load reduction rate threshold value of the power grid according to the set demand response delay time;
the sorting unit 40 is configured to sort the participating demand response devices that do not execute demand response according to the priority evaluation index size, so as to obtain a sorted participating device set and a participating device with the highest priority;
the first judging unit 50 is configured to judge whether the participating device with the highest priority in the participating device set executes the demand response according to the condition that the demand response is satisfied, and judge whether other participating devices execute the demand response again if the participating device does not execute the demand response;
a second judging unit 60, configured to execute a demand response for the participating device according to the result of the first judging unit 50, interrupt and remove the participating device, and then end the demand response if the sum of the operating powers of all the participating devices that have executed the demand response is greater than the power reduction requested power of the demand response information; and if the sum of the working power of all the participating devices which have performed the demand response is not more than the power required by the power reduction of the demand response information, re-ordering the devices which need to participate in the response.
It should be noted that the units of the system in the second embodiment are correspondingly arranged in the method of the first embodiment, and the content of the steps corresponding to the respective units has been described in detail in the first embodiment, which is not described in this embodiment.
The demand response control system for limiting the load reduction rate of the power grid acquires data through the data acquisition unit and the equipment power data acquisition unit, processes the acquired data through the threshold calculation unit and the sequencing unit, and enables the first judgment unit to judge whether the equipment executes demand response or not under the demand response requirement condition according to the processed data; the technical problem that power load curve sudden conditions occur in demand side management of a power grid, and a power generating set of the power grid cannot adjust sudden drop capacity to cause power grid unbalance and abnormal operation is solved.
Example three:
the embodiment of the invention provides equipment, which comprises a processor and a memory;
a memory for storing the program code and transmitting the program code to the processor;
and a processor for executing the demand response control method for limiting the load shedding rate of the power grid according to instructions in the program code.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; 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 (10)
1. A demand response control method for limiting the rate of grid shedding comprising the steps of:
s1, acquiring data information of power grid demand response, wherein the data information comprises demand response information and information of response-participatable equipment;
s2, acquiring the working power of each participatory demand response device from the participatory demand response device information according to the demand response information and participatory demand response devices;
s3, calculating a load reduction rate threshold of the power grid according to the set demand response delay time;
s4, sequencing the participation demand response devices which do not execute demand response according to the priority evaluation index to obtain a sequenced participation device set and a participation device with the highest priority;
step S5, judging whether the participant equipment with the highest priority level in the participant equipment set executes the demand response or not under the condition of meeting the demand response, if so, executing the demand response by the participant equipment, interrupting the participant equipment, removing the participant equipment, and executing step S6; if not, the step S5 is executed repeatedly;
s6, if the sum of the working powers of all the participating devices which execute the demand response is larger than the power reduction required power of the demand response information, the demand response is finished; if the sum of the operating powers of all the participating devices that have performed the demand response is not greater than the power required for power reduction of the demand response information, performing step S2;
wherein the demand response information includes a start time, an end time, and a power required for power reduction of the demand response.
2. The demand response control method of limiting a grid shedding rate according to claim 1, wherein the demand response condition comprises:
the moment when the participating device executes the demand response is between the start time and the end time of the demand response;
selecting the participating equipment with the highest priority from the participating equipment set, and calculating the load reduction rate of the participating equipment with the highest priority, wherein the load reduction rate of the participating equipment with the highest priority is not greater than the load reduction rate threshold;
the sum of the operating power of all participating devices in the set that have been interrupted is less than the power required for the power reduction.
3. The demand response control method for limiting the grid shedding rate according to claim 2, wherein the calculation is performedThe load reduction rate A of the highest priority participating devicejThe formula of (1) is:
in the formula, the participating device with the highest priority level is selected from the participating device set, and the number of the participating device is j and PjTo select the operating power of the participating device with the highest priority, t is the time when the participating device executes the demand response, tkThe moment when the participating devices perform the demand response for the kth time.
4. The demand response control method for limiting the grid shedding rate according to claim 1, wherein the formula for calculating the shedding rate threshold a is as follows:
in the formula, PDRTo reduce the required power, Δ tDRThe demand response delay time is the time taken from the start time of the demand response to the completion of the demand response.
5. The demand response control method for limiting the load shedding rate of the power grid according to claim 1, wherein the priority evaluation index of each of the participating demand response devices is obtained according to a device priority index calculation formula.
6. The demand response control method for limiting the grid shedding rate according to claim 5, wherein the equipment priority index riThe calculation formula is as follows: r isi＝aNi-bKi(ii) a In the formula, NiIs a user comfort index, K, of the deviceiThe price factor index of the equipment is shown, wherein a and b are constants, and i is the number of the equipment.
7.The demand response control method for limiting the load shedding rate of a power grid according to claim 6, wherein the user comfort index N of the device is calculated according to the type of the participating demand response devicesiThe method specifically comprises the following steps:
judging whether the equipment participating in the demand response is equipment maintaining the temperature, if so, judging the comfort level index N of the useriThe calculation formula of (2) is as follows:
if not, the user comfort level index NiThe calculation formula of (2) is as follows:
in the formula, TsetOptimum temperature, T, for participating in the operation of demand-responsive equipmentminAnd TmainFor the minimum and maximum values of the temperature of the participating demand-responsive devices, TnowA current temperature of operation for the participating demand response device; t is tworkTotal working time t of participating demand response equipment under the condition of not participating demand responsetotalEstimated total time of operation, t ', for participating demand response devices without participating in demand response'workIs total time of operation, t ', of participating demand response devices on precondition of participating demand responses'totalAnd predicting the total working time of the participating demand response equipment on the premise of participating the demand response.
8. The demand response control method for limiting the load shedding rate of a power grid according to claim 6, wherein a price factor index K of a device is calculatediIs Ki＝(Z-ZDR)*PiWherein Z is the electricity price without requiring response, ZDRFor electricity prices in the demand response phase, PiThe operating power of the participating demand response devices numbered i.
9. A demand response control system for limiting the load reduction rate of a power grid is characterized by comprising a data acquisition unit, an equipment power data acquisition unit, a threshold calculation unit, a sequencing unit, a first judgment unit and a second judgment unit;
the data acquisition unit is used for acquiring data information of power grid demand response, and the data information comprises demand response information and response-participatable equipment information;
the device power data acquisition unit is used for acquiring the working power of each participatory demand response device from the participatory demand response device information according to the demand response information and the participatory demand response device;
the threshold value calculating unit is used for calculating the load reduction rate threshold value of the power grid according to the set demand response delay time;
the sequencing unit is used for sequencing the participation demand response equipment which does not execute demand response according to the priority evaluation index to obtain a sequenced participation equipment set and the participation equipment with the highest priority;
the first judging unit is used for judging whether the participating equipment with the highest priority in the participating equipment set executes the demand response or not according to the condition that the demand response is met, and judging whether other participating equipment executes the demand response again if the participating equipment does not execute the demand response;
the second judging unit is configured to execute a demand response for the participating device according to the result of the first judging unit, interrupt and remove the participating device, and then end the demand response if the sum of the operating powers of all the participating devices that have executed the demand response is greater than the power reduction required power of the demand response information; and if the sum of the working power of all the participating devices which have executed the demand response is not greater than the power required by the power reduction of the demand response information, reordering the devices which need to participate in the response.
10. An apparatus comprising a processor and a memory;
the memory is used for storing program codes and transmitting the program codes to the processor;
the processor is configured to execute the demand response control method for limiting the grid load shedding rate according to any one of claims 1 to 8 according to instructions in the program code.
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