CN113435708A - Building comprehensive energy management method and system based on comprehensive demand response - Google Patents
Building comprehensive energy management method and system based on comprehensive demand response Download PDFInfo
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Abstract
The invention discloses a building comprehensive energy management method and system based on comprehensive demand response, relating to the field of building comprehensive energy system energy management, wherein the method combines price type and incentive type demand response and provides a comprehensive demand response strategy for information interaction of a building comprehensive energy system and a superior distribution network; and considering peak regulation requirements of the power distribution network and the economical efficiency and satisfaction degree of building operation, establishing a building comprehensive energy system optimization scheduling model considering comprehensive demand response, and converting the model into mixed integer linear programming. The proposed model is solved by a solver CPLEX. By the method, good interaction between the building comprehensive energy system and the superior distribution network can be realized, and the capability of the building comprehensive energy system participating in comprehensive demand response is exploited, so that both interaction parties benefit from the method.
Description
Technical Field
The invention relates to the field of energy management of building comprehensive energy systems, in particular to a building comprehensive energy management method and system based on comprehensive demand response.
Background
In recent years, the building of the comprehensive energy system improves the energy utilization efficiency by the collaborative optimization and integrated operation of multiple energy networks at the supply and demand sides, and becomes the development trend of the building in the future. In the building integrated energy system, energy users can participate in interaction in a traditional demand response mode, and can participate in integrated demand response in the forms of energy conversion and multi-energy complementation by changing self energy utilization types. The comprehensive demand response is based on the characteristic of multi-energy-flow coupling in a building comprehensive energy system, energy conversion and time transfer are combined, the enthusiasm of users participating in demand response is effectively improved, and the demand response potential is greatly stimulated. However, the building integrated energy system still has the following problems when participating in the comprehensive demand response, namely, the interaction mechanism between the building integrated energy system and the superior distribution network is imperfect; secondly, the controllability of a building user is difficult to describe, and a superior network cannot accurately issue a regulation instruction; thirdly, the compensation mechanism is not reasonable. Therefore, the comprehensive demand response information interaction mechanism for the building comprehensive energy system and the superior distribution network is established, the controllability of the building comprehensive energy system is quantized, a reasonable comprehensive demand response compensation mechanism is provided, and research on energy management of the building comprehensive energy system under comprehensive demand response is carried out.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a building comprehensive energy management method based on comprehensive demand response, which comprises the following steps:
s1: the building integrated energy system energy management center formulates a day-ahead scheduling optimization strategy on the basis of time-of-use electricity price based on a self energy utilization plan, and uploads the day-ahead scheduling optimization strategy to a power distribution network energy management center in the form of a building integrated energy system energy utilization curve;
s2: the distribution network energy management center judges whether the day-ahead scheduling optimization strategy is possible to exceed the power limit or not according to the received energy utilization curve of the building integrated energy system, if not, the distribution network energy management center issues the judgment result of the power limit exceeding to each building integrated energy system, and each building integrated energy system operates according to the originally formulated day-ahead scheduling optimization strategy; if the power is out of limit, go to step S3;
s3: the power distribution network energy management center carries out peak shaving demand evaluation on the originally formulated day-ahead scheduling optimization strategy and issues a demand response time interval and building comprehensive demand response capacity to the building;
s4: building comprehensive energy systems construct an optimized scheduling model aiming at meeting the peak regulation requirement of a superior power grid and minimizing the operation cost, reformulate a day-ahead scheduling optimization strategy, obtain building comprehensive requirement response capacity, compensation price and an updated energy utilization curve of the building comprehensive energy systems, and report the curve to a power distribution network energy management center;
s5: the power distribution network energy management center selects the building comprehensive energy system participating in the comprehensive demand response with the aim of meeting the peak load demand and the minimum supplement cost according to the compensation price and the building comprehensive demand response capacity received in the step S4, if the building comprehensive energy system is selected to participate in the comprehensive demand response, the step S6 is executed, and if the building is not selected to participate in the comprehensive demand response, the step S6 is executed according to the day-ahead scheduling optimization strategy re-formulated in the step S4;
s6: re-performing power out-of-limit judgment based on the building comprehensive energy system selected to participate in the comprehensive demand response; if no power out-of-limit is possible, signing a contract with the power distribution network energy management center, carrying out comprehensive demand response according to the contract, and obtaining compensation; if there is still a possibility of power out-of-limit, go to step S7;
s7: the power distribution network energy management center makes a load interruption plan aiming at the out-of-limit part of the building comprehensive energy system, and the building comprehensive energy system carries out load interruption according to the plan.
Preferably, the objective function of the building integrated energy system optimization scheduling model in S4 is as follows:
in the formula, t0And t1Respectively representing the starting time and the ending time of the building comprehensive demand response;
the peak clipping capacity value is issued to a power distribution network energy management center; delta PtPeak clipping power of the building comprehensive energy system after actually participating in building comprehensive demand response;
the gateway power of the building comprehensive energy system at the time t when the gateway power does not participate in the building comprehensive demand response is represented; ptThe gateway power of the building comprehensive energy system after responding to the building comprehensive demand;
the total operation cost of the building comprehensive energy system after participating in the building comprehensive demand response;
the comprehensive operation cost of the building comprehensive energy system is not involved in the response of the building comprehensive demand;
the weight coefficient is determined by a weight analysis method, and the numerical value is selected according to the following principle:
daily operating cost F of buildingdayFrom the cost of electricity purchase FeGas purchase cost FgAnd the equipment operation maintenance cost FomLight abandoning cost FPVThe method comprises the following steps:
Fday＝Fe+Fg+Fom+FPV
in the formula (I), the compound is shown in the specification,
the electricity purchase price at the moment t;
the gas purchase price at the moment t;
and
the electricity and gas purchasing quantity of the building in the time period t;
operating and maintaining costs for the device i when outputting unit power; zetai，tThe output of the device i in the time period t; c. CPVTaking 1 yuan/kWh for a light abandoning penalty coefficient;
and
respectively, photovoltaic predicted output and actual output.
Through the technical scheme, the total operation cost of the building comprehensive energy system can be minimized as far as possible on the premise that the peak regulation of the superior distribution network is preferentially met.
Preferably, the objective function of the building integrated energy system optimization scheduling model in S4 considers the peak shaving demand of the power distribution network and the building operation economy.
Preferably, the building integrated energy system optimized dispatching strategy formulated by the building in the step S4 satisfies power balance constraints, energy equipment constraints and integrated demand response constraints.
Electric power balance constraint:
in the formula (I), the compound is shown in the specification,
is the electrical power load within the building at time t.
Cold power balance constraint:
in the formula (I), the compound is shown in the specification,
the cold power load in the building at time t.
The pneumatic power balance constraint:
in the formula:
is the air load in the building at time t.
And thermal power balance constraint:
in the formula (I), the compound is shown in the specification,
all low-grade heat power in a building comprehensive energy system;
all medium-grade thermal power in a building comprehensive energy system;
is the hot water load.
And (3) constraint of a cogeneration unit:
in the formula (I), the compound is shown in the specification,
the electric power of the ith cogeneration unit at the moment t;
the natural gas consumption rate at the moment t of the ith cogeneration unit; etaCHPThe gas-electricity conversion efficiency of the cogeneration unit;
and
respectively outputting medium grade and low grade heat power at the moment t of the ith cogeneration unit; etaCHP,MAnd ηCHP,LRespectively the medium grade and low grade heat recovery efficiency of the cogeneration unit; hGVIs the heat value of natural gas.
Electric gas conversion device restraint:
in the formula (I), the compound is shown in the specification,
the natural gas conversion amount at the t moment of the ith P2G device;
electrical switching efficiency for the ith P2G device;
the electric power consumed at the moment t for the ith P2G device.
And (3) gas boiler restraint:
in the formula (I), the compound is shown in the specification,
the thermal output for the ith GB at time t;
the gas consumption rate at time t for the ith GB;
the gas-heat conversion efficiency of the ith GB is obtained.
Steam-driven equipment constraint:
in the formula (I), the compound is shown in the specification,
the steam driving power of the ith steam driving device at the moment t;
the low-grade thermal power recovered for the ith steam driving device at the moment t;
the heat recovery efficiency of the ith steam-driven device.
Restraint of the absorption refrigerator:
in the formula (I), the compound is shown in the specification,
the refrigerating power of the ith absorption refrigerator at the moment t;
the thermal power consumed by the ith absorption refrigerator at the moment t; i isBr，copThe energy efficiency ratio of the absorption refrigerator.
Air-conditioning restraint:
in the formula (I), the compound is shown in the specification,
the refrigeration power of the ith air conditioner at the moment t;
heating power at the moment t of the ith air conditioner;
and
electric power consumed by the ith air conditioner for refrigeration and heating at the moment t;
and IAC，hRespectively, the refrigeration energy consumption ratio and the heating energy consumption ratio of the air conditioner.
Ice cold storage device restraint:
in the formula (I), the compound is shown in the specification,
the refrigeration power of the ith ice storage device at the moment t;
and
the refrigeration power of the ith refrigerating machine and the moment t of the ice storage tank are respectively;
and
the power consumptions of the ith ice storage device, the refrigerator and the ice storage tank at the moment t are respectively; i isref，cThe refrigeration energy efficiency ratio of the refrigerator; t isrefAnd TmeltIs an ice storage period and an ice melting period; i istank，cThe ice making energy efficiency ratio of the ice storage tank; etatank，mThe ice melting efficiency of the ice storage tank; sigmatank，cThe loss coefficient of the ice storage tank is;
the ice storage capacity at the time t of the i ice storage tanks. It should be noted that the cold accumulation and ice melting operations of the ice storage tank cannot be performed simultaneously.
And (4) energy storage system constraint:
in the formula (I), the compound is shown in the specification,
the energy storage capacity of i electric energy storage devices at the moment t;
and
for the charging and discharging power of i electric energy storage devices at the moment t,
and
the charge and discharge coefficients of the electric energy storage device; the charging and discharging of the electric energy storage device can not be carried out simultaneously; u. of
The binary variable represents the discharge state of the ith electric energy storage t moment, 1 represents the discharge state, and 0 represents the discharge state;
the binary variable represents the charging state of the ith electric energy storage at the moment t, 1 represents the charging state, and 0 represents the non-charging state;
the charge-discharge upper limit value of the ith electric energy storage system;
and
the capacity of the ith electric energy storage system is an upper limit value and a lower limit value.
And (3) equipment output constraint:
in the formula, ζi,tThe output of the energy equipment i at the moment t;ζ iand
the lower limit and the upper limit of the output of the energy equipment; alpha is alphai，tIs a binary variable and represents the working state of the energy equipment i at the moment t, and the value of 1 represents the starting state of the equipment, namely"0" indicates an off state.
Photovoltaic output restraint:
building comprehensive demand response power upper limit constraint:
and (3) restricting the upper limit of the gateway power in the non-building comprehensive demand response period:
in the formula, HtThe thermal power of the building comprehensive energy system in the non-building comprehensive demand response time period is provided;
and
the upper limit value of electric power and thermal power of the gateway of the building comprehensive energy system in the non-comprehensive demand response period.
Preferably, the compensation price made by the building according to the optimized scheduling model in S4 is:
Freimb＝λreimb(2-Suser)FIDR
in the formula, FreimbCompensating quotation cost for the building comprehensive energy system; lambda [ alpha ]reimbIs a satisfaction weight factor.
Preferably, the compensation price is established by the optimized scheduling model in the step S4 based on the building comprehensive demand response cost and the satisfaction degree.
Preferably, the building comprehensive demand response cost is as follows:
in the formula, FIDRRepresenting the building's integrated demand response cost. The difference of the scheduling operation cost before and after the building participates in the building comprehensive demand response represents the building comprehensive demand response cost.
Preferably, the satisfaction is used for representing the enthusiasm of the building for participating in building comprehensive demand response, and the building comprehensive demand response satisfaction is composed of energy consumption satisfaction and energy supply satisfaction, wherein the satisfaction is as follows:
in the formula, SuserFor the satisfaction degree after the building participates in the building comprehensive demand response, S is more than or equal to 0user≤1；SappThe use can be satisfied; ssupTo supply energy satisfaction.
Through the technical scheme, a reasonable comprehensive demand response compensation mechanism can be established according to the economical efficiency and the satisfaction degree of the building comprehensive energy system, and the enthusiasm of the building comprehensive energy system for participating in comprehensive demand response is stimulated.
A building integrated energy management system based on integrated demand response comprises a building and upper-level power distribution network information interaction strategy, wherein the upper-level power distribution network information interaction strategy comprises a building energy management module, an information interaction module, an information storage module, a state monitoring module, an integrated demand response decision module and a load interruption decision module;
the building energy management module is connected with the information interaction module, the first information storage module and the external environment, the first information interaction module is connected with the first information storage module and the second information interaction module, the state detection module, the comprehensive demand response decision-making module and the load interruption decision-making module are sequentially connected, and the second information interaction module and the load interruption decision-making module are connected with the second information storage module;
the first information interaction module and the second information interaction module are used for performing information interaction between the building comprehensive energy system energy management center and the power distribution network energy management center;
the information storage module is used for storing the interactive information of the building comprehensive energy system energy management center and the power distribution network energy management center;
the state monitoring module is used for monitoring whether the power of the power distribution network exceeds the limit;
the comprehensive demand response decision-making module is used for the power distribution network to perform peak regulation demand evaluation and decide a building comprehensive energy system participating in comprehensive demand response;
and the load interruption decision module is used for making a load interruption plan when power overruns still exist after comprehensive demand response so as to ensure the safe operation of the power grid.
Through the scheme, information can be shared but decision can be independently made among different modules, and the strategy making efficiency of the building comprehensive energy system and the power distribution network is improved.
The invention has the beneficial effects that:
the comprehensive demand response information interaction mechanism for the building comprehensive energy system and the upper-level power distribution network is formulated, the regulation and control capacity of the building comprehensive energy system is quantized, a reasonable comprehensive demand response compensation mechanism is provided, the peak regulation demand of the power distribution network and the economical efficiency and satisfaction degree of building operation are both considered, the energy management of the building comprehensive energy system under the comprehensive demand response is realized, and the comprehensive demand response comprehensive energy management system has high practicability.
Drawings
FIG. 1 is a schematic diagram of a method for building integrated energy management based on integrated demand response;
FIG. 2 is a schematic diagram of an integrated energy management system for a building based on integrated demand response;
fig. 3 shows a schematic diagram of a building integrated energy system 1 of a building integrated energy management method based on integrated demand response;
FIG. 4 is a schematic diagram of a building integrated energy system 2 for a building integrated energy management method based on integrated demand response;
fig. 5 is a schematic diagram showing electric power balance before integrated demand response of the building integrated energy system 1 in a building integrated energy management method based on integrated demand response;
fig. 6 is a schematic diagram showing electric power balance after integrated demand response of the building integrated energy system 1 in the integrated demand response-based building integrated energy management method;
fig. 7 is a schematic diagram showing cold power balance before comprehensive demand response of the building integrated energy system 1 in the building integrated energy management method based on comprehensive demand response;
fig. 8 is a schematic diagram showing a cold power balance after the building integrated energy system 1 integrated demand response based on the building integrated energy management method of integrated demand response;
fig. 9 is a schematic diagram showing a gateway power change before the integrated demand response of the building integrated energy system 1 in the integrated demand response-based building integrated energy management method;
fig. 10 is a schematic diagram of the gateway power change before the integrated demand response of the building integrated energy system 2 of the building integrated energy system energy management system considering the integrated demand response.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to fig. 1 to 10 of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other implementations made by those of ordinary skill in the art based on the embodiments of the present invention are obtained without inventive efforts.
In the description of the present invention, it is to be understood that the terms "counterclockwise", "clockwise", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used for convenience of description only, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be considered as limiting.
As shown in fig. 1, a building integrated energy management method based on integrated demand response includes the following steps:
step 1: the building integrated energy system energy management center formulates a day-ahead scheduling optimization strategy on the basis of time-of-use electricity price based on a self energy utilization plan, and uploads the day-ahead scheduling optimization strategy to a power distribution network energy management center in the form of a building integrated energy system energy utilization curve;
step 2: the distribution network energy management center judges whether the day-ahead scheduling optimization strategy is possible to exceed the power limit or not according to the received energy utilization curve of the building integrated energy system, if not, the distribution network energy management center issues the judgment result of the power limit exceeding to each building integrated energy system, and each building integrated energy system operates according to the originally formulated day-ahead scheduling optimization strategy; if the power is out of limit, go to step S3;
and step 3: the power distribution network energy management center carries out peak shaving demand evaluation on the originally formulated day-ahead scheduling optimization strategy and issues a demand response time interval and building comprehensive demand response capacity to the building;
and 4, step 4: building comprehensive energy systems construct an optimized scheduling model aiming at meeting the peak regulation requirement of a superior power grid and minimizing the operation cost, reformulate a day-ahead scheduling optimization strategy, obtain building comprehensive requirement response capacity, compensation price and an updated energy utilization curve of the building comprehensive energy systems, and report the curve to a power distribution network energy management center;
and 5: the power distribution network energy management center selects the building comprehensive energy system participating in the comprehensive demand response with the aim of meeting the peak load demand and the minimum supplement cost according to the compensation price and the building comprehensive demand response capacity received in the step S4, if the building comprehensive energy system is selected to participate in the comprehensive demand response, the step S6 is executed, and if the building is not selected to participate in the comprehensive demand response, the step S6 is executed according to the day-ahead scheduling optimization strategy re-formulated in the step S4;
step 6: re-performing power out-of-limit judgment based on the building comprehensive energy system selected to participate in the comprehensive demand response; if no power out-of-limit is possible, signing a contract with the power distribution network energy management center, carrying out comprehensive demand response according to the contract, and obtaining compensation; if there is still a possibility of power out-of-limit, go to step S7;
and 7: the power distribution network energy management center makes a load interruption plan aiming at the out-of-limit part of the building comprehensive energy system, and the building comprehensive energy system carries out load interruption according to the plan.
As shown in fig. 2, a building integrated energy management system based on integrated demand response comprises a building and superior distribution network information interaction strategy, wherein the superior distribution network information interaction strategy comprises a building energy management module, an information interaction module, an information storage module, a state monitoring module, an integrated demand response decision module and a load interruption decision module;
the building energy management module is connected with the information interaction module, the first information storage module and the external environment, the first information interaction module is connected with the first information storage module and the second information interaction module, the state detection module, the comprehensive demand response decision-making module and the load interruption decision-making module are sequentially connected, and the second information interaction module and the load interruption decision-making module are connected with the second information storage module;
the first information interaction module and the second information interaction module are used for performing information interaction between the building comprehensive energy system energy management center and the power distribution network energy management center;
the information storage module is used for storing the interactive information of the building comprehensive energy system energy management center and the power distribution network energy management center;
the state monitoring module is used for monitoring whether the power of the power distribution network exceeds the limit;
the comprehensive demand response decision-making module is used for the power distribution network to perform peak regulation demand evaluation and decide a building comprehensive energy system participating in comprehensive demand response;
and the load interruption decision module is used for making a load interruption plan when power overruns still exist after comprehensive demand response so as to ensure the safe operation of the power grid.
As shown in fig. 3, the building integrated energy system of the building 1 includes the production, transmission, conversion, storage and use of various energy sources, and utilizes the multi-energy flow coupling mechanism in the system to realize multi-energy complementation; the main existing energy equipment comprises a cogeneration unit, a PV unit, a P2G device, steam driving equipment, an absorption refrigerator, a gas boiler, an air conditioner, an ice cold storage device and energy storage; the building comprehensive energy system takes electricity and gas purchase from a superior power grid and a natural gas company as main energy sources, the cold accumulation device can utilize surplus electric energy or low-price electric energy to carry out ice accumulation operation, and melt ice when needed to release cold energy, and the cold accumulation device and the energy storage device play the same effects of peak clipping and valley filling; the gas boiler can adopt natural gas to generate heat to meet the heat load requirement in the building when the electricity price is high; the hot steam provided by the cogeneration unit in the building is used as a main driving heat source of the steam driving equipment, and the absorption refrigerator can perform refrigeration operation by adopting the hot steam recovered by the steam driving equipment; the air conditioner is used as another main device for refrigerating and heating to meet cold load and heat load, and when the demand of a building system for one or more energy sources is changed, the supply and demand of other energy sources can be influenced;
based on the method, when the building comprehensive energy system participates in the demand response of the upper-level power grid, the same peak clipping and valley filling effects can be achieved by adjusting the demands on different energy sources under the condition that the comfort level of the building comprehensive energy system is not influenced, so that the peak clipping demand of the upper-level power grid is met, the building comprehensive demand response of the building comprehensive energy system is realized, the energy supply does not need to be delayed by a building comprehensive demand response mechanism, the comfort level of users participating in the building comprehensive demand response is improved, the demand response potential of the users can be fully excavated, and the demand response effect is greatly enhanced;
as shown in fig. 4, the building complex energy system of the building 2 only includes electricity, cold energy flow and load.
Respectively setting a building 1 containing a cold, hot, electricity and gas energy supply system as shown in fig. 3 and a building 2 case set containing only electricity, cold energy flow and load as shown in fig. 4 to explore the actual energy management benefits of the building comprehensive energy system participating in the comprehensive demand response, and assuming that the peak clipping time period of the comprehensive demand response issued by the superior distribution network is the peak power consumption time period 18: 00-19: 00, sending a peak regulation instruction of 2.5MW in the economic area.
As shown in fig. 5 and 6, the device operation strategy of the building 1 is greatly changed before and after the comprehensive demand response; during the peak clipping period, the ESS device is charged with high power when not participating in the comprehensive demand response so as to meet the demand of economic optimal operation; in the peak clipping period after the comprehensive demand response is participated, the electricity purchase of the building 1 is reduced, the ESS device is changed from a charging state to a discharging state so as to meet the demand of the building electricity load, in addition, the power of the cogeneration unit in the building 1 is increased, more natural gas is consumed to generate electricity to directly supply electricity for the building load, and the building electricity load can still be met.
As shown in fig. 7 and 8, the ice storage device is not operated during the peak clipping period before participating in the integrated demand response; in the peak clipping period after the participation of the comprehensive demand response, the ice storage device starts to melt ice and refrigerate with high power, the output of the cogeneration unit is increased, so more waste heat is generated, the absorption refrigerator takes the waste heat as a heat source to carry out refrigeration operation, and the power is increased; the increase of the refrigeration power of the ice storage device and the absorption refrigerator reduces the electricity of the supplementary cooling load required by the air conditioner, so that the electricity consumption of the air conditioner is reduced, and the effect of reducing the electricity consumption in the peak clipping period is achieved on the premise of not influencing the supply of the cooling load.
As shown in fig. 9, the building 1 changes its own energy utilization strategy cooperatively through conversion of multiple energy types such as supercooling, heat, electricity, gas, and the like, so as to respond to the peak clipping requirement of the upper power grid, and has a large response potential, and successfully responds to the peak clipping requirement of 2.5MW issued by the upper power distribution network in the peak clipping period.
As shown in fig. 10, the building 2 contains only electricity, cold energy flow and load, so the building 2 can only respond to traditional power demands. When the building 2 receives a peak clipping instruction issued by the power distribution network to perform a demand response, the ESS is increased by the discharge power, and the ice storage device starts ice melting operation to supply cold to meet the cold load, so that the power consumption of the air conditioner is reduced to meet the peak clipping requirement. Building 2 can only provide peak clipping capacity approaching 1.9MW during demand response periods, not reaching 2.5MW as required by the upper level grid.
The economic compensation when building 1 and building 2 respond to different capacities is shown in table 1 and table 2, respectively; as can be seen from tables 1 and 2, the maximum response capacity of the building 2 only reaches 1.9MW, and the maximum response capacity of the building 1 is larger than that of the building 2 due to the cooperative conversion and energy substitution among the multiple energy sources, and can reach 2.5MW required by a superior power grid; since the comprehensive demand response has a smaller influence on the building 1 with the complementary functions, the building 1 has higher user satisfaction and lower compensation when the response capacity is the same as that of the building 2.
Table 1 building 1 comprehensive demand response compensation table
Table 2 building 2 comprehensive demand response compensation table
Claims (9)
1. A building comprehensive energy management method based on comprehensive demand response is characterized by comprising the following steps:
s1: the building integrated energy system energy management center formulates a day-ahead scheduling optimization strategy on the basis of time-of-use electricity price based on a self energy utilization plan, and uploads the day-ahead scheduling optimization strategy to a power distribution network energy management center in the form of a building integrated energy system energy utilization curve;
s2: the distribution network energy management center judges whether the day-ahead scheduling optimization strategy is possible to exceed the power limit or not according to the received energy utilization curve of the building integrated energy system, if not, the distribution network energy management center issues the judgment result of the power limit exceeding to each building integrated energy system, and each building integrated energy system operates according to the originally formulated day-ahead scheduling optimization strategy; if the power is out of limit, go to step S3;
s3: the power distribution network energy management center carries out peak shaving demand evaluation on the originally formulated day-ahead scheduling optimization strategy and issues a demand response time interval and comprehensive demand response capacity to the building;
s4: building comprehensive energy systems construct an optimized scheduling model aiming at meeting the peak regulation requirement of a superior power grid and minimizing the operation cost, reformulate a day-ahead scheduling optimization strategy, obtain building comprehensive requirement response capacity, compensation price and an updated energy utilization curve of the building comprehensive energy systems, and report the curve to a power distribution network energy management center;
s5: the power distribution network energy management center selects the building comprehensive energy system participating in the comprehensive demand response with the aim of meeting the peak load demand and the minimum supplement cost according to the compensation price and the building comprehensive demand response capacity received in the step S4, if the building comprehensive energy system is selected to participate in the comprehensive demand response, the step S6 is executed, and if the building is not selected to participate in the comprehensive demand response, the step S6 is executed according to the day-ahead scheduling optimization strategy re-formulated in the step S4;
s6: re-performing power out-of-limit judgment based on the building comprehensive energy system selected to participate in the comprehensive demand response; if no power out-of-limit is possible, signing a contract with the power distribution network energy management center, carrying out comprehensive demand response according to the contract, and obtaining compensation; if there is still a possibility of power out-of-limit, go to step S7;
s7: the power distribution network energy management center makes a load interruption plan aiming at the out-of-limit part of the building comprehensive energy system, and the building comprehensive energy system carries out load interruption according to the plan.
2. The method for building integrated energy management based on integrated demand response of claim 1, wherein the objective function of the building integrated energy system optimized dispatching model in the step S4 is as follows:
in the formula, t0And t1Respectively representing the starting time and the ending time of the building comprehensive demand response;
the peak clipping capacity value is issued to a power distribution network energy management center; delta PtPeak clipping power after the building actually participates in the building comprehensive demand response;
the gateway power of the building comprehensive energy system at the time t when the gateway power does not participate in the building comprehensive demand response is represented; ptThe gateway power of the building comprehensive energy system after responding to the building comprehensive demand;
the total operation cost of the building comprehensive energy system after participating in the building comprehensive demand response;
the comprehensive operation cost of the building comprehensive energy system is not involved in the response of the building comprehensive demand;
the weight coefficient is determined by a weight analysis method, and the numerical value is selected according to the following principle:
daily operating cost F of buildingdayFrom the cost of electricity purchase FeGas purchase cost FgAnd the equipment operation maintenance cost FomIs thrown awayOptical cost FPVThe method comprises the following steps:
Fday＝Fe+Fg+Fom+FPV
in the formula (I), the compound is shown in the specification,
the electricity purchase price at the moment t;
the gas purchase price at the moment t;
and
the electricity and gas purchasing quantity of the building in the time period t;
operating and maintaining costs for the device i when outputting unit power; zetai，tThe output of the device i in the time period t; c. CPVTaking 1 yuan/kWh for a light abandoning penalty coefficient;
and
respectively, photovoltaic predicted output and actual output.
3. The method for building integrated energy management based on integrated demand response of claim 2, wherein the objective function of the building integrated energy system optimization scheduling model in the step S4 considers peak shaving requirements of the power distribution network and the economy of building operation.
4. The method for building integrated energy management based on integrated demand response of claim 1, wherein the building integrated energy system optimized dispatching strategy formulated by the building in the S4 satisfies power balance constraints, energy device constraints and integrated demand response constraints.
5. The integrated building energy management method based on integrated demand response of claim 1, wherein the compensation price made by the building according to the optimized scheduling model in S4 is:
Freimb＝λreimb(2-Suser)FIDR
in the formula, FreimbCompensating quotation cost for the building comprehensive energy system; lambda [ alpha ]reimbIs a satisfaction weight factor.
6. The integrated demand response-based building energy management method according to claim 5, wherein the compensation price is established by the optimized scheduling model in S4 based on the integrated demand response cost and satisfaction degree of the building.
7. The integrated building energy management method based on integrated demand response of claim 6, wherein the integrated building demand response cost is:
in the formula, FIDRRepresenting the building's integrated demand response cost. The difference of the scheduling operation cost before and after the building participates in the building comprehensive demand response represents the building comprehensive demand response cost.
8. The method as claimed in claim 6, wherein the satisfaction degree is used to characterize the enthusiasm of the building for participating in the building integrated demand response, and the building integrated demand response satisfaction degree is composed of energy consumption satisfaction degree and energy supply satisfaction degree, and the satisfaction degree is:
in the formula, SuserFor the satisfaction degree after the building participates in the building comprehensive demand response, S is more than or equal to 0user≤1；SappThe use can be satisfied; ssupTo supply energy satisfaction.
9. A building integrated energy management system based on integrated demand response is characterized by comprising a building and upper-level power distribution network information interaction strategy, wherein the upper-level power distribution network information interaction strategy comprises a building energy management module, an information interaction module, an information storage module, a state monitoring module, an integrated demand response decision module and a load interruption decision module;
the building energy management module is connected with the information interaction module, the first information storage module and the external environment, the first information interaction module is connected with the first information storage module and the second information interaction module, the state detection module, the comprehensive demand response decision-making module and the load interruption decision-making module are sequentially connected, and the second information interaction module and the load interruption decision-making module are connected with the second information storage module;
the first information interaction module and the second information interaction module are used for performing information interaction between the building comprehensive energy system energy management center and the power distribution network energy management center;
the information storage module is used for storing the interactive information of the building comprehensive energy system energy management center and the power distribution network energy management center;
the state monitoring module is used for monitoring whether the power of the power distribution network exceeds the limit;
the comprehensive demand response decision-making module is used for the power distribution network to perform peak regulation demand evaluation and decide a building comprehensive energy system participating in comprehensive demand response;
and the load interruption decision module is used for making a load interruption plan when power overruns still exist after comprehensive demand response so as to ensure the safe operation of the power grid.
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