CN111025912A - Peak-shaving-oriented micro-grid differentiated scheduling control system and method thereof - Google Patents

Peak-shaving-oriented micro-grid differentiated scheduling control system and method thereof Download PDF

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CN111025912A
CN111025912A CN201911359165.7A CN201911359165A CN111025912A CN 111025912 A CN111025912 A CN 111025912A CN 201911359165 A CN201911359165 A CN 201911359165A CN 111025912 A CN111025912 A CN 111025912A
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user
heat
microgrid
grid
micro
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CN111025912B (en
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李琼慧
王宣元
黄碧斌
冯凯辉
易忠林
胡静
闫湖
洪博文
谢国辉
王彩霞
薛晓强
雷雪姣
李梓仟
时智勇
郭俊宏
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State Grid Energy Research Institute Co Ltd
State Grid Jibei Electric Power Co Ltd
Electric Power Research Institute of State Grid Jibei Electric Power Co Ltd
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State Grid Energy Research Institute Co Ltd
State Grid Jibei Electric Power Co Ltd
Electric Power Research Institute of State Grid Jibei Electric Power Co Ltd
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    • G05B13/00—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion
    • G05B13/02—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric
    • G05B13/04—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric involving the use of models or simulators
    • G05B13/042—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric involving the use of models or simulators in which a parameter or coefficient is automatically adjusted to optimise the performance

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Abstract

The invention discloses a micro-grid differential scheduling control system and method facing peak shaving, wherein the system comprises a plurality of micro-grids, and an internal heat supply network of each micro-grid is respectively connected with a heat exchanger and a public heat supply network primary pipe network; the system comprises a thermal power plant and a first circulating pump which are connected in series with a primary pipe network of a public heat supply network; the internal power line of each micro-grid is connected with one end of a public power grid through a connecting line, and the other end of the public power grid is connected with a centralized wind power generation system, a centralized photovoltaic power generation system and a thermal power plant in parallel; the peak shaving auxiliary service center is in communication connection with each micro-grid; each micro-grid is provided with a micro-grid regulation and control center in communication connection with the peak regulation auxiliary service center. According to the difference of the thermal and electric regulation capacity among the micro-grids and the difference of the spatial distribution among the micro-grids, the micro-grids meeting the conditions are selected for control; the whole system improves the control precision, further excavates the peak regulation potential of the microgrid, improves the consumption of green energy and reduces the peak regulation cost.

Description

Peak-shaving-oriented micro-grid differentiated scheduling control system and method thereof
Technical Field
The invention relates to the technical field of clean energy comprehensive scheduling application, in particular to a micro-grid differential scheduling control system and method for peak shaving.
Background
With the rapid development of economy, the gradual exhaustion of primary energy and the outstanding satisfaction of environmental pollution problems, green renewable energy is more and more concerned by various countries. The installed capacity and grid-connected scale of wind power in China are increased year by year, but the wind power grid-connected scale also faces a serious wind abandon phenomenon. Relevant researches show that the multi-wind period and the heating peak period in the three north areas of China coincide, and the rapid reduction of the peak regulation capacity of the system caused by heating in the heating period of a thermal power plant is a main reason for wind abandonment. The reason is that the traditional 'electricity fixed by heat' operation mode limits the electricity output adjusting range of the cogeneration unit, so that the peak load regulation capacity of the system is reduced, the wind power resource receiving capacity of the system is further reduced, and a large amount of wind abandon is caused.
The micro-grid aims to realize flexible and efficient application of distributed power supplies and solve the problem of grid connection of the distributed power supplies with large quantity and various forms. The micro-grid has good flexibility, is the mainstream direction of future distributed energy development and is also an important component of a future smart grid, and the existing multi-micro-grid parameter-combined peak regulation related technology enables the micro-grid to be equivalent to a controllable load with good responsiveness by regulating and controlling the thermoelectric output and the thermoelectric consumption in the micro-grid, and does not relate to interactive scheduling of a heat supply system in the micro-grid and a public heat supply network primary pipe network.
In view of this, it is desirable to provide a power grid dispatching control system and method considering microgrid differences.
Disclosure of Invention
In order to solve the technical problem, the technical scheme adopted by the invention is to provide a micro-grid differentiated scheduling control system facing peak shaving, which comprises:
the internal heat supply network of each micro-grid is respectively connected with a heat exchanger and a public heat supply network primary pipe network; the system comprises a thermal power plant and a first circulating pump which are connected in series with a primary pipe network of the public heat supply network;
the internal power line of each micro-grid is connected with one end of a public power grid through a connecting line, and the other end of the public power grid is connected with a centralized wind power generation system, a centralized photovoltaic power generation system and a thermal power plant in parallel;
the peak shaving auxiliary service center is in communication connection with each micro-grid; each micro-grid is provided with a micro-grid regulation and control center in communication connection with a peak regulation auxiliary service center.
In the above scheme, each microgrid comprises a cogeneration system;
the microgrid difference measurement system is used for measuring the microgrid difference in the combined heat and power system and controlling the peak regulation capacity of the system;
the combined heat and power system comprises a user electric load, a user heat load, a user heating radiator, a heat exchanger, an electric boiler end heat exchanger, a directly-heated electric boiler, a gas turbine end heat exchanger, a gas turbine combined heat and power system and a second circulating pump; the micro-grid internal heat supply network is used for connecting a user heating radiator, a heat exchanger, an electric boiler end heat exchanger, a gas turbine end heat exchanger and a second circulating pump in series; the user heat load, the directly-heated electric boiler and the gas turbine cogeneration system are respectively connected with a user heating radiator, an electric boiler end heat exchanger and a gas turbine end heat exchanger; the user electric load, the direct heating type electric boiler and the gas turbine cogeneration system are connected to the internal power line in parallel;
the microgrid difference measuring system comprises a microgrid regulating and controlling center, a microgrid heat consumption meter, an electric boiler power consumption meter, a gas turbine cogeneration system heat supply meter, a gas turbine cogeneration system power supply meter, an electric boiler heat supply meter and a microgrid power consumption meter;
the micro-grid heat consumption meter is arranged at a hot fluid inlet end of the heat exchanger;
the electric boiler power consumption meter is arranged at the connecting part of the direct heating type electric boiler and the internal power line;
the heat supply meter of the gas turbine cogeneration system is arranged at the cold fluid outlet end of the gas turbine end heat exchanger;
the power supply meter of the gas turbine cogeneration system is arranged at the connection part of the gas turbine cogeneration system and the internal power line;
the electric boiler heat supply meter is arranged at the cold fluid outlet end of the electric boiler end heat exchanger;
the micro-grid power consumption meter is a bidirectional meter and is arranged at the joint of an internal power line and a connecting line;
the micro-grid regulation and control center is connected with the peak regulation auxiliary service center through optical fibers.
In the above solution, the method further includes a user difference measurement system:
the user difference measuring system comprises a user heat consumption meter, a room temperature sensor module, an embedded integrated touch screen and a user power consumption meter;
the user electricity consumption meter is arranged at a user electricity load end, and the user heat consumption meter is arranged at a user heating radiator end;
the user heat consumption meter, the room temperature sensor module and the user power consumption meter are connected with the embedded integrated touch screen through an RS485 bus, and the collected user data information is sent to the embedded integrated touch screen; the embedded integrated touch screen is connected with the micro-grid regulation and control center through the local area network and sends the received user data information such as power consumption, heat consumption and room temperature to the micro-grid regulation and control center.
In the scheme, the embedded integrated touch screen stores the heat consumption and room temperature data information of the user in a storage module of the embedded integrated touch screen, and the stored data is the heat consumption and room temperature data information of the user in a month; and comparing the real-time data of the heat consumption and the room temperature of the user with the average value of the respective historical data, if the real-time data of the heat consumption and the room temperature of the user are both larger than the average value of the respective historical data, judging that the user is in a schedulable state, if not, judging that the user is in a non-schedulable state, and feeding back the user information to the peak-shaving auxiliary service center.
In the scheme, the embedded integrated touch screen divides users in the microgrid into two types by taking the preset heat supply time of the users in one day of a working day as a boundary according to the heating history information of the users, if the heat supply time of the users in one day is longer than the preset heat supply time, the users in the microgrid are divided into a first type, other users which are less than or equal to the preset heat supply time are divided into a second type, and the information of the users is fed back to the peak regulation auxiliary service center.
In the above scheme, the preset heat supply time is 15 hours.
In the scheme, the system further comprises a differentiation control system;
the differential control system comprises a first user heating electric regulating valve, a second user heating electric regulating valve, a micro-grid heating electric regulating valve and an electric boiler controller; the first user heating electric regulating valve and the user heating manual regulating valve are connected in series and then connected between the user heating radiator and the heat exchanger, and the second user heating electric regulating valve is connected in parallel with the first heating electric regulating valve and the user heating manual regulating valve.
The first user heating electric regulating valve and the second user heating electric regulating valve are connected with the embedded integrated touch screen through an RS485 bus;
the micro-grid heat supply electric regulating valve is arranged at the joint of the heat exchanger and the public heat supply network primary pipe network and is connected with the micro-grid regulating and controlling center through a local area network;
the electric boiler controller is connected with the directly-heated electric boiler in series through a power supply line and connected with the micro-grid regulation and control center through a local area network.
The invention also provides a micro-grid differential scheduling control method facing peak shaving based on the system, which comprises the following steps:
s1, sending the heat supply amount and the electric energy exchange amount of the public heat supply network primary pipe network to the heat supply network inside the microgrid, the heat supply amount, the electric energy consumption and the electric output amount inside the microgrid to a microgrid regulating and controlling center;
s2, the micro-grid regulation and control center calculates the heat and electricity regulation amount provided when each micro-grid participates in peak regulation and assistance through a nonlinear mixed integer programming algorithm under the constraint conditions of thermoelectric output, electricity consumption, heat production and the like of an internal system according to the received data and the prediction data of the heat and electricity loads of the users inside each micro-grid; the micro-grid regulation and control center transmits the data to the peak regulation auxiliary service center through optical fibers;
s3, the peak shaving auxiliary service center solves the thermoelectric output functions of the thermal power plant and the system according to the difference of each microgrid, the wind power output condition, the thermoelectric output condition of the thermal power plant, the heat and electric power adjustment amount which can be provided by each microgrid and the heat transmission delay constraint condition, determines that the microgrid meeting the condition participates in peak shaving, and sends the heat and electric power adjustment amount which can be participated in peak shaving by the internal system to the microgrid control center.
In the method, in step S1, the microgrid control center further receives user data of power consumption, heat consumption and indoor temperature of the user, which are acquired by the system;
the microgrid control center collects the heat supply and electric energy exchange amount of the primary public heat supply network to the heat supply network in the microgrid, the heat supply amount, the power consumption and the electricity output amount in the microgrid through the received power consumption, heat consumption and room temperature data information of users, calculates and calculates the heat and electric regulation amount provided when each microgrid participates in peak regulation assistance and feeds back the heat and electric regulation amount to the peak regulation assistance service center under the constraint conditions of thermoelectric output, power consumption, heat production and the like of the internal system in each microgrid;
the peak regulation auxiliary service center selects the micro-grid and the internal users thereof meeting the conditions to participate in peak regulation according to the differences of the micro-grid and the internal users thereof, under the constraint conditions of wind power output condition, thermal power plant thermal power output condition, thermal power supply regulating quantity and electric power regulating quantity provided by the micro-grid, user category, user scheduling state, heat transmission delay and the like, calculates the thermal power output functions of the thermal power plant and the internal thermal power systems in the micro-grid, selects the micro-grid and the internal users thereof meeting the conditions to participate in peak regulation, and sends corresponding regulation instructions to the micro-grid regulation center.
In the above method, the determining of the user schedulable state includes the steps of:
comparing the power consumption, the heat consumption and the room temperature real-time data of the user with the average value of the respective historical data stored in the system, if the real-time data of the user and the room temperature real-time data are both larger than the average value of the respective historical data, judging that the user is in a schedulable state, and if not, judging that the user is in a non-schedulable state.
According to the invention, a power line inside a microgrid is connected with a public power grid through a connecting line, a heat supply network inside the microgrid is connected with a primary heat supply network through a heat exchanger, and a wind power peak comes temporarily, so that the heat and electricity output of a thermal power plant is reduced, and the microgrid meeting conditions is selected for control according to the difference of heat and electricity regulating capacities among the microgrids and the difference of spatial distribution among the microgrids; the heat exchange power of the heat supply network in the micro-grid and the primary pipe network of the public heat supply network is controlled, the heating power of the directly-heated electric boiler in the micro-grid and the heat and electricity output of the gas turbine cogeneration system are also controlled, the control precision of the whole system is improved, the peak regulation potential of the micro-grid is further excavated, the consumption of green energy is improved, and the peak regulation cost is reduced.
Drawings
FIG. 1 is a schematic diagram of a system provided by the present invention;
FIG. 2 is a schematic diagram of the connection structure of the electrical and thermal network in the system according to the present invention;
FIG. 3 is a schematic diagram of the system information exchange of the present invention;
FIG. 4 is a flow chart provided by the present invention.
Description of reference numerals:
A. a peak shaving auxiliary service center, B, a centralized wind power generation system, C, a centralized photovoltaic power generation system, D, a thermal power plant, E, a primary pipe network of a public heat supply network, F, a heat supply network inside a microgrid, G, a public power grid, H, an internal power line, I, a microgrid control center, J, an embedded integrated touch screen, K, the microgrid, 101, a first circulating pump, 102, a connecting line, 103, a user electric load, 104, a user electric load, 105, a user heating radiator, 106, a heat exchanger, 107, an electric boiler end heat exchanger, 108, a direct heating type electric boiler, 109, a gas turbine end heat exchanger, 110, a gas turbine cogeneration system, 111, a second circulating pump, 201, a user heat consumption meter, 202, a room temperature sensor module, 203, a user power consumption meter, 301, a microgrid heat consumption meter, 302, an electric boiler power consumption meter, 303, a gas turbine cogeneration system heat supply meter, 304. gas turbine combined heat and power generation system power supply meter, 305, electric boiler heat supply meter, 306, little electric wire netting power consumption meter, 401, the first heating electrical control valve of user, 402, user second heating electrical control valve, 403, little electric wire netting heat supply electrical control valve, 404, electric boiler controller, 501, user's heating manual control valve.
Detailed Description
The system is added with a microgrid difference measuring system and a user difference measuring system, and is also added with a differentiation control system adapted to the systems, so that the actions of a thermal power plant, a heat turbine cogeneration system, a direct heating type electric boiler, a microgrid heating electric regulating valve, a user first heating electric regulating valve and a user second heating electric regulating valve in each time period in the future are regulated on the premise of considering the microgrid difference and the user difference, and the action sequence and the action duration of the user first heating electric regulating valve and the user second heating electric regulating valve are controlled, so that the peak regulation potential of the microgrid and the internal users of the microgrid is more fully excavated, the regulation flexibility and the control precision of the system are improved, the peak regulation capacity of the system is improved, and the peak regulation cost is reduced.
The invention is described in detail below with reference to specific embodiments and the accompanying drawings.
As shown in fig. 1, the present invention provides a peak-shaving-oriented microgrid differentiated scheduling control system, which includes: the internal heat supply network of each microgrid K is respectively connected with the heat exchanger 106 and connected with the public heat supply network primary pipe network E, and the microgrid K further comprises a thermal power plant D and a first circulating pump 101 which are connected in series on the public heat supply network primary pipe network E;
the internal power line H of each microgrid K is connected to one end of a public power grid G through a tie line 102, and the other end of the public power grid G is connected in parallel to a centralized wind power generation system B, a centralized photovoltaic power generation system C, and a thermal power plant D.
And the peak shaving auxiliary service center A is in communication connection with each micro-grid optical fiber, wireless or remote and the like.
Wherein, as shown in figures 2-3,
each micro-grid K comprises a combined heat and power system; and the microgrid difference measuring system is used for measuring the microgrid difference in the combined heat and power system and controlling the peak regulation capacity of the system.
The cogeneration system comprises a user electric load 103, a user heat load 104, a user heating radiator 105, a heat exchanger 106, an electric boiler end heat exchanger 107, a direct heating type electric boiler 108, a gas turbine end heat exchanger 109, a gas turbine cogeneration system 110 and a second circulating pump 111; for convenience of description, in each microgrid, to the case where only one consumer electrical load 103 and one consumer thermal load 104 are set, but not limited to grid scheduling in the case where only one consumer electrical load 103 and one consumer thermal load 104 are set or analyzed, a case where multiple sets of consumer electrical loads 103 and consumer thermal loads 104 exist in each microgrid can be correspondingly suggested from the present invention, and this embodiment protects the microgrid.
The hot fluid channel of the heat exchanger 106 is connected with the thermal power plant D and the first circulating pump 101 through the first-stage pipe network E of the common heat supply network to form a loop.
A hot fluid channel of a user heating radiator 105, a cold fluid channel of an electric boiler end heat exchanger 107, a cold fluid channel of a heat exchanger 106, a cold fluid channel of a gas turbine end heat exchanger 109 and a second circulating pump 111 are connected to form a loop by a heat supply network F inside the microgrid;
the user heat load 104 is connected with a user heating radiator 105; the directly-heated electric boiler 108 is connected with a hot fluid channel of the electric boiler end heat exchanger 107; the gas turbine cogeneration system 110 is connected to the hot fluid path of the gas turbine side heat exchanger 109.
The consumer electric load 103, the direct heating electric boiler 108, and the gas turbine cogeneration system 110 are connected in parallel to the internal power line H. Compared with a heat storage device, the directly-heated electric boiler 108 which is preferred by the system has the advantages of small occupied area, high energy utilization efficiency and low investment cost.
The centralized wind power generation system B, the centralized photovoltaic power generation system C and the thermal power plant D are in optical fiber connection with the peak shaving auxiliary service center A, and the peak shaving auxiliary service center A acquires power generation data of the centralized wind power generation system B and the centralized photovoltaic power generation system C and thermoelectric output data of the thermal power plant D.
Each microgrid K realizes bidirectional exchange of electric energy with the public power grid G through the tie line 102. In the wind power peak period, the public power grid G transmits power to each micro-power grid K through the connecting line 102 to consume wind power; during peak load periods of the public power grid G, the microgrid transmits power to the public power grid G through the tie lines 102 to relieve load pressure of the public power grid G.
The microgrid difference measurement system comprises a microgrid regulation and control center I, a microgrid heat consumption meter 301, an electric boiler electricity consumption meter 302, a gas turbine cogeneration system heat supply meter 303, a gas turbine cogeneration system power supply meter 304, an electric boiler heat supply meter 305 and a microgrid electricity consumption meter 306;
the microgrid heat consumption meter 301 is installed at the hot fluid inlet end of the heat exchanger 106; the system is used for collecting the heat supply load of the public heat supply network primary pipe network to the heat supply network in the microgrid.
The electric boiler electricity consumption meter 302 is arranged at the connection part of the directly-heated electric boiler 108 and the internal power line H; used for collecting the power consumption of the directly-heated electric boiler 108.
The heat supply meter 303 of the gas turbine cogeneration system is arranged at the cold fluid outlet end of the gas turbine end heat exchanger 109; for measuring the amount of heat supplied by the gas turbine cogeneration system 110 to the heat grid internal to the microgrid.
The gas turbine cogeneration system power supply meter 304 is installed at the connection of the gas turbine cogeneration system 110 and the internal power line H; for measuring the electricity output of the gas turbine cogeneration system 110.
The electric boiler heat supply meter 305 is arranged at the cold fluid outlet end of the electric boiler end heat exchanger 107; the system is used for collecting the heat supply of the directly-heated electric boiler 108 to the heat supply network in the microgrid.
The micro-grid electricity consumption meter 306 is a bidirectional electricity meter and is arranged at the joint of the internal power line H and the connecting line 102; the method is used for collecting the electric energy exchange quantity of the micro-grid and an external grid.
The micro-grid heat consumption meter 301, the electric boiler power consumption meter 302, the gas turbine cogeneration system heat supply meter 303, the gas turbine cogeneration system power supply meter 304, the electric boiler heat supply meter 305 and the micro-grid power consumption meter 306 respectively send the acquired data to the micro-grid regulation and control center I through the local area network;
and the micro-grid regulation and control center I is connected with the peak regulation auxiliary service center A through optical fibers.
The microgrid heat consumption meter 301, the electric boiler power consumption meter 302, the gas turbine cogeneration system heat supply meter 303, the gas turbine cogeneration system power supply meter 304, the electric boiler heat supply meter 305 and the microgrid power consumption meter 306 are connected with the microgrid control center I through a local area network, and the acquired microgrid data information is sent to the microgrid control center I; and the micro-grid regulation and control center I sends all data information of the micro-grid and the internal users thereof to the peak regulation auxiliary service center A.
The microgrid regulating and controlling center I calculates and calculates the heat and electricity regulating quantity provided by each microgrid when participating in peak regulation and assisting through nonlinear mixed integer programming according to the received data and the prediction data of the heat and electricity loads of users inside each microgrid and under the constraint conditions of heat and electricity output of a gas turbine cogeneration system, electricity consumption and heat production of a direct-heating electric boiler and the like; the microgrid control center I transmits the data to the peak shaving auxiliary service center A through optical fibers.
The peak regulation auxiliary service center A calculates and analyzes the micro-grid participating in peak regulation meeting the conditions through nonlinear mixed integer programming according to the difference of the micro-grid and under the constraint conditions of wind power output condition, thermal power plant thermal power output condition, heat and electricity regulation amount provided by the micro-grid, user category, heat transmission delay and the like, calculates and analyzes the heat and electricity operation parameters of the thermal power plant D and the gas turbine cogeneration system 110 participating in peak regulation, sends corresponding peak regulation control instructions to corresponding user heating radiators 105, heat exchangers 106, electric boiler end heat exchangers 107 and gas turbine end heat exchangers 109 according to the parameters, and regulates corresponding control physical quantities.
The method comprises the following steps of obtaining the heat and electric regulation quantity provided by the micro-grid: under the constraint conditions of thermoelectric output of a gas turbine, power consumption and heat generation of a directly-heated electric boiler and the like, the micro-grid regulation center (I) calculates the heat and electric regulation amount provided by the micro-grid when participating in peak regulation through a nonlinear mixed integer programming algorithm.
In this embodiment, the differences of the micro grid are the differences of the amounts of thermal and electrical power regulation that the micro grid can provide:
the minimum heat and electricity output power of the gas turbine at the same time are respectively Qchp(min)、Pchp(min), the maximum heat output power of the directly-heated electric boiler is Q (max), the heating efficiency is β0The thermal output power and the electric output power of the gas turbine are respectively Q at the momentchp、PchpThe heat output power of the directly-heated electric boiler is Q; the amount of thermal regulation that the microgrid can provide at this moment is Qchp-Qchp(min) + Q (max) -Q, the amount of electrical conditioning P that the microgrid can providechp-Pchp(min)+(Q(max)-Q)/β；
Differences between the microgrid are particularly shown in the following steps:
the installed capacities of the gas turbines in the micro-grids are different, the maximum heat output power of the directly-heated electric boiler is different, the output power of the directly-heated electric boiler and the output power of the gas turbines at the last moment are different, and finally the difference is expressed as the difference of the heat and electric regulation quantity provided by the micro-grids.
In this embodiment, the microgrid control center I receives the collected heat supply and electric energy exchange amount of the primary public heat network to the internal heat network of the microgrid, the power consumption of the direct-heating electric boiler 108 and its own power consumption, the heat and electricity output amount of the gas turbine cogeneration system 110 to the internal heat network of the microgrid, and then considers the prediction data of the heat and electricity loads of the users in each microgrid, and under the constraint conditions of heat and electricity output of the gas turbine cogeneration system, power consumption and heat production of the direct-heating electric boiler, the heat and electricity adjustment amount which can be provided when each microgrid (including the direct-heating electric boiler and the gas turbine cogeneration system) participates in peak regulation and is calculated by nonlinear mixed integer programming and fed back to the peak regulation auxiliary service center a, and the peak regulation auxiliary service center a calculates the heat and electricity adjustment amount according to the difference of the microgrid and under the conditions of wind power output and output of the thermal power plant, Under the constraint conditions of heat and electric power regulation amount, heat transmission delay and the like which can be provided by each microgrid, solving a heat and power output function of a thermal power plant D and a gas turbine cogeneration system 110 by using a nonlinear mixed integer programming algorithm, determining that the microgrid meeting the conditions participates in peak shaving, and sending heat and electric power regulation amount, sequence and time length which can be participated in the peak shaving by the gas turbine cogeneration system 110 and the direct-heating electric boiler 108 to a microgrid control center I; the method and the device have the advantages that the interactive scheduling of the heat supply system inside the microgrid and the primary pipe network of the public heat supply network is realized, the actions of the thermal power plant, the heat turbine cogeneration system and the direct-heating electric boiler in each future time period are adjusted on the premise of considering the differences of the microgrid, the action sequence and the action duration are controlled, the peak regulation potential of the microgrid is more fully excavated, and the peak regulation cost is reduced.
Preferably, in order to improve the peak shaving capacity of the system, the peak shaving potential of the microgrid and internal users thereof is fully mined, the difference between the internal users is brought into the whole scheduling control, and a user difference measurement system is arranged;
the user difference measuring system comprises a user heat consumption meter 201, a room temperature sensor module 202, an embedded integrated touch screen J and a user electricity consumption meter 203;
the user electricity consumption meter 203 is arranged at the end of the user electricity load 103 and is used for collecting the electricity consumption of the user in real time;
the user heat consumption meter 201 is arranged at the end 105 of the user heating radiator and is used for collecting the heat consumption of a user in real time;
the user side is provided with a room temperature sensor module 202 for collecting the indoor temperature information of the user;
the embedded integrated touch screen J sends user data information to the micro-grid regulation and control center I through the local area network and receives regulation and control instructions from the micro-grid regulation and control center I;
the user heat consumption meter 201, the room temperature sensor module 202 and the user electricity consumption meter 203 are connected with the embedded integrated touch screen J through an RS485 bus, and the collected user data information is sent to the embedded integrated touch screen J; the embedded integrated touch screen J is connected with the micro-grid regulation and control center I through a local area network, and sends received user data information such as power consumption, heat consumption and indoor temperature of a user to the micro-grid regulation and control center I. In this embodiment, the user consumption meter 201, the room temperature sensor module 202, and the user consumption meter 203 can also be directly connected with the microgrid control center I wirelessly according to the requirement.
According to the difference of the microgrid and the internal users thereof, the peak shaving auxiliary service center A selects the microgrid meeting the conditions and the thermoelectric output functions of the internal users of the microgrid participating in peak shaving, the thermal power plant D and the gas turbine cogeneration system 110 through a nonlinear mixed integer programming algorithm under the constraint conditions of wind power output condition, thermal power plant thermoelectric output condition, heat and electric power adjustment quantity provided by the microgrid, user category, user scheduling state, heat transmission delay and the like; and sends corresponding peak regulation control instructions to the corresponding user heating radiator 105, heat exchanger 106, electric boiler end heat exchanger 107 and gas turbine end heat exchanger 109 to regulate the corresponding control physical quantity.
The method comprises the following steps of obtaining the heat and electric regulation quantity provided by the micro-grid: the microgrid regulating and controlling center I calculates the user heat load adjustable quantity (which is the sum of all user heat loads which can be scheduled) in the microgrid according to the heat consumption and the schedulable state of each user in the microgrid, and calculates the heat and electric power adjustable quantity which can be provided when the microgrid participates in peak regulation and assistance through a nonlinear mixed integer programming algorithm under the constraint conditions of the thermoelectric output of a gas turbine, the power consumption and heat production of a direct-heating electric boiler and the like.
The method comprises the following steps of: the embedded integrated touch screen J classifies users according to the heat consumption duration of the users in one day, and obtains the schedulable state of the users by comparing the heat consumption and room temperature real-time data of the users with the average value of the respective historical data;
in this embodiment, the differences of the micro grid are the differences of the amounts of thermal and electrical power regulation that the micro grid can provide:
the minimum heat and electricity output power of the gas turbine at the same time are respectively Qchp(min)、Pchp(min), the maximum heat output power of the directly-heated electric boiler is Q (max), the heating efficiency is β0The thermal output power and the electric output power of the gas turbine are respectively Q at the momentchp、PchpThe heat output power of the directly-heated electric boiler is Q, and the user heat load adjustable quantity is Qus(for the sum of all schedulable customer thermal loads within each microgrid) (ii) a The amount of thermal regulation that the microgrid can provide at this moment is Qus+Qchp-Qchp(min) + Q (max) -Q, the amount of electrical conditioning P that the microgrid can providechp-Pchp(min)+(Q(max)-Q)/β；
Differences between the microgrid are particularly shown in the following steps:
the installed capacity of the gas turbines in each microgrid is different, the maximum heat output power of the directly-heated electric boiler is different, the heat load adjustable quantity of users is different (caused by the difference of the number of controllable users in different microgrids and the difference of the composition proportion of the controllable users), the output of the directly-heated electric boiler and the gas turbines at the last moment is different, and finally the difference represents the difference of the heat and electric power adjustable quantities provided by the microgrids.
Differences between the microgrid are particularly shown in the following steps:
the installed capacity of the gas turbines in each microgrid is different, the maximum heat output power of the directly-heated electric boiler is different, the heat load adjustable quantity of users is different (caused by the difference of the number of controllable users in different microgrids and the difference of the composition proportion of the controllable users), the output of the directly-heated electric boiler and the gas turbines at the last moment is different, and finally the difference represents the difference of the heat and electric power adjustable quantities provided by the microgrids.
In this embodiment, the embedded integrated touch screen J stores the data information of the heat consumption and the room temperature of the user in its own storage module, and the stored data is the data information of the heat consumption and the room temperature of the user in a month; comparing the real-time data of the user on the heat consumption and the room temperature with the average value of the respective historical data, and if the real-time data of the user on the heat consumption and the room temperature are both larger than the average value of the respective historical data, judging that the user is in a schedulable state; if not, the user is judged to be in a non-scheduling state, and the user information is used as a basis for selecting the user to participate in scheduling by the peak shaving auxiliary service center A.
In addition, the embedded integrated touch screen J divides users in the microgrid into two types by taking the preset heat supply time of the users in one day of a working day as a boundary according to the heating historical information of the users, if the users with the heat supply time longer than the preset heat supply time in one day are divided into a first type, other users with the heat supply time shorter than or equal to the preset heat supply time are divided into a second type, and the user information is used as a basis for the peak-shaving auxiliary service center A to preferentially select which users to participate in scheduling; the embedded integrated touch screen J sends the data to the micro-grid regulation and control center I, and then the micro-grid regulation and control center I sends the data to the peak regulation auxiliary service center A through the optical fiber.
In the embodiment, the preset heating time is preferably 13-15 hours, which means that the corresponding heating time exceeds 50% or more of 24 hours, and is a user with poor peak regulation capability.
The user differences in this embodiment are differences in user schedulable states, differences in user categories, differences in user heat consumption, and differences in distances from users to the microgrid heat source, where the user schedulable state obtaining step is: the embedded integrated touch screen J classifies users according to the heat consumption duration of the users in one day, and obtains the schedulable state of the users by comparing the heat consumption and room temperature real-time data of the users with the average value of the respective historical data;
and the difference of the user categories is obtained according to the feedback of the embedded integrated touch screen J.
And the difference of the heat consumption of the user is determined by comparing the power consumption of the user collected by the power consumption meter of the user in real time.
In this embodiment, the microgrid control center I collects the heat supply and the electric energy exchange amount of the primary network of the public heat supply network to the internal heat supply network of the microgrid, the power consumption of the direct-heating electric boiler 108 and the power consumption of the direct-heating electric boiler, the heat and the electricity output amount of the gas turbine cogeneration system 110 to the internal heat supply network of the microgrid, and under the constraints of heat, electricity output of the internal users of the microgrid, heat and electricity saving amount which can be provided when the gas turbine cogeneration system participates in peak shaving assistance (including the direct-heating electric boiler and the gas turbine cogeneration system) and heat generation such as the power consumption of the direct-heating electric boiler and the like, is calculated by nonlinear mixed integer programming and fed back to the peak shaving auxiliary service center a, and the peak shaving auxiliary service center a calculates the difference of the microgrid and the differentiated data information of the internal users according to the received power consumption, heat consumption and room temperature data information of the user, under the constraint conditions of wind power output condition, thermoelectric output condition of a thermal power plant, heat and electric power adjustment quantity provided by a microgrid, user category, user controllable state, heat transmission delay and the like, solving thermoelectric output functions of a thermal power plant D and a gas turbine cogeneration system 110 by using a nonlinear mixed integer programming algorithm, determining that the microgrid meeting the conditions participates in peak shaving, and sending corresponding peak shaving control instructions of a user heating radiator 105, a heat exchanger 106, an electric boiler end heat exchanger 107 and a gas turbine end heat exchanger 109 to a microgrid shaving control center I; the method and the device have the advantages that the interactive scheduling of the heat supply system inside the microgrid and the primary pipe network of the public heat supply network is realized, the actions of the thermal power plant, the heat and steam turbine cogeneration system and the direct-heating electric boiler in each future time period are adjusted on the premise of considering the differences of the microgrid and the differences of internal users, the action sequence and the action duration are controlled, the peak regulation potentials of the microgrid and the internal users are more fully excavated, the flexibility and the control precision of system adjustment are improved, the peak regulation capacity of the system is improved, and the peak regulation cost is reduced.
Preferably, in the embodiment, in order to improve the flexibility of system adjustment, a differentiation control system is further arranged;
the differentiation control system comprises a first user heating electric regulating valve 401, a second user heating electric regulating valve 402, a micro-grid heating electric regulating valve 403 and an electric boiler controller 404; the first user heating electric regulating valve 401 and the manual user heating regulating valve 501 are connected in series and then connected between the user heating radiator 105 and the heat exchanger 106, and the second user heating electric regulating valve 402 is connected in parallel with the first user heating electric regulating valve 401 and the manual user heating regulating valve 501.
The first user heating electric regulating valve 401 and the second user heating electric regulating valve 402 are connected with the embedded integrated touch screen J through RS485 buses and are used for controlling the heat consumption of the user heat load 104; the embedded integrated touch screen J sends user data information to the micro-grid regulation and control center I through the local area network, and receives regulation and control instructions from the micro-grid regulation and control center I to control the opening and closing of the first heating electric regulating valve 401 of the user and the second heating electric regulating valve 402 of the user.
The microgrid heat supply electric regulating valve 403 is installed at the joint of the heat exchanger 106 and the public heat supply network primary pipe network E and is connected with a microgrid regulating and controlling center I through a local area network, and the microgrid regulating and controlling center I regulates and controls the on/off of the microgrid heat supply electric regulating valve 403 through a regulating and controlling instruction and is used for controlling the heat supply amount of the public heat supply network primary pipe network E to the heat supply network in the microgrid;
the electric boiler controller 404 is connected in series with the directly-heated electric boiler 108 through a power supply line, and is connected with the microgrid control center I through a local area network, and is used for controlling the heating power of the directly-heated electric boiler 108;
the microgrid control center I sends a thermoelectric control instruction to the gas turbine cogeneration system 110 through a local area network to control the work of the gas turbine cogeneration system; and the peak shaving auxiliary service center A sends a thermoelectric regulation and control instruction to the thermal power plant D.
The differentiation control system is additionally provided with a first user heating electric regulating valve 401 and a second user heating electric regulating valve 402 at a user side; when the user does not participate in peak shaving, the micro-grid regulation and control center I controls the first heating electric regulating valve 401 to be opened, the second heating electric regulating valve 402 to be closed, and the user regulates the heating load by regulating the user heating manual regulating valve 501; when a user participates in peak shaving, the micro-grid regulation center I controls the first heating electric regulating valve 401 to be closed, and the control of the user heat supply is realized by regulating the opening degree of the second heating electric regulating valve 402 of the user.
In this embodiment, the microgrid control center I collects the heat supply and power exchange amount of the primary network of the public heat supply network to the internal heat network of the microgrid, the power consumption of the direct-heating electric boiler 108 and its own power consumption, the heat and power output amount of the gas turbine cogeneration system 110 to the internal heat network of the microgrid, considers the prediction data of the heat and power loads of the users in each microgrid, calculates and calculates the heat and power adjustment amounts provided by each microgrid (including the direct-heating electric boiler and the gas turbine cogeneration system) when participating in peak shaving assistance through nonlinear mixed integer programming under the heat production constraints of the heat, power output, power consumption of the direct-heating electric boiler, and the like, and feeds back the heat and power adjustment amounts to the peak shaving assistance service center a, and the peak shaving assistance service center a calculates and feeds back the peak shaving assistance service center a according to the differences between the microgrid and its internal users, under the constraint conditions of wind power output condition, thermal power output condition of a thermal power plant, heat and electricity regulating quantity provided by a microgrid, user category, user scheduling state, heat transmission delay and the like, analyzing the microgrid meeting the conditions and the internal user participation peak shaving of the microgrid through nonlinear mixed integer programming, and calculating and solving the action functions of a first user heating electric regulating valve 401, a second user heating electric regulating valve 402, a microgrid heating electric regulating valve 403 and an electric boiler controller 404 inside the microgrid participating in the peak shaving, and the thermal power output functions of a thermal power plant D and a gas turbine cogeneration system 110; and then sending corresponding peak regulation control instructions of the user heating radiator 105, the heat exchanger 106, the electric boiler end heat exchanger 107 and the gas turbine end heat exchanger 109 to the microgrid regulation and control center I, and sending corresponding action instructions to the user first heating electric regulating valve 401, the user second heating electric regulating valve 402, the microgrid heat supply electric regulating valve 403 and the electric boiler controller 404, wherein the microgrid regulation and control center I regulates corresponding control physical quantity for corresponding devices.
The method comprises the following steps of obtaining the heat and electric regulation quantity provided by the micro-grid: the microgrid regulation and control center I calculates the user heat load adjustable quantity (which is the sum of all the user heat loads which can be scheduled in the microgrid) in the microgrid according to the heat consumption and the schedulable state of each user in the microgrid; and then under the constraint conditions of the thermoelectric output of the gas turbine, the power consumption and heat generation of the directly-heated electric boiler and the like, the heat and electricity adjustment amount which can be provided when the micro-grid participates in peak regulation and assistance is calculated through a nonlinear mixed integer programming algorithm.
In this embodiment, the difference of the microgrid also lies in the difference of the distance from the microgrid to the thermal power plant. Because the distances from the micro-grids to the thermal power plant and the thermoelectric regulation amounts which can be provided are different, the adjustable and controllable states, the heat consumption amounts and the distances from the micro-grids to the heat sources of the users in the micro-grids are also different, and further, the action functions of the first heating electric regulating valve 401 and the second heating electric regulating valve 402 of the users of different users in the same micro-grid are different, the action functions of the micro-grid heating electric regulating valve 403 and the electric boiler controller 404 in different micro-grids are different, and the thermoelectric output functions of the thermal power plant D and the gas turbine cogeneration system 110 in different micro-grids are also different;
therefore, the differentiated control of the internal users in the embodiment includes the following aspects:
among users of the same type: the control priority of the user with higher heating room temperature is lower than that of the user with lower heating room temperature;
the priorities of different types of user controls are different: the control priority of the second type of users is higher than that of the first type of users;
the room temperature of different types of users can fluctuate: the room temperature fluctuation range of the second type of users is larger than the room temperature fluctuation range of the first type of users;
the adjustable time lengths of different users: the controllable time length of the second type of users is longer than that of the first type of users.
The user differentiation measuring system collects data information of users inside a microgrid in the cogeneration system through devices such as a user heat consumption meter 201 and a room temperature sensor module 202, and sends the data information to an embedded integrated touch screen J through RS485 bus users; the differential measurement system of the micro-grid collects data information of the micro-grid in the cogeneration system through devices such as a micro-grid heat consumption meter 301 and an electric boiler power consumption meter 302, and sends the data information of the micro-grid to a micro-grid regulation and control center I through a local area network; the embedded integrated touch screen J sends user data information to a micro-grid regulation and control center I through a local area network; the micro-grid regulation and control center I sends the micro-grid and data information used in the micro-grid to a peak auxiliary service center A in a differentiation control system through optical fibers; the differentiation control system sends the regulation and control instruction to a thermal power plant, a micro-grid and internal users thereof through a peak auxiliary service center A, a micro-grid regulation and control center I and an embedded integrated touch screen J, and then controls the thermal power plant, the micro-grid and the internal users thereof in the cogeneration system.
The regulation process of the system provided by the invention is illustrated by the following specific examples:
firstly, classifying users according to the heat consumption duration of the users in one day by an embedded integrated touch screen J in a user differentiation measurement system, and obtaining the schedulable state of the users by comparing the heat consumption and room temperature real-time data of the users with the average value of respective historical data; and then user data such as the heat consumption, the power consumption, the category, the schedulable state and the like of the user are sent to the micro-grid regulation and control center I.
Then the microgrid regulation and control center I determines the user heat load adjustable quantity in the microgrid according to the heat consumption and the user schedulable state of each user in the microgrid; and then under the constraint conditions of the thermoelectric output of the gas turbine, the power consumption and heat generation of the directly-heated electric boiler and the like, the heat and electricity adjustment amount which can be provided when the micro-grid participates in peak regulation assistance is calculated through a nonlinear mixed integer programming algorithm, and user data and micro-grid data are sent to a peak regulation assistance service center A.
The peak regulation auxiliary service center A selects the micro-grids meeting the requirements and the internal users thereof to participate in peak regulation according to the data of each micro-grid and the internal users thereof; under the constraint conditions of wind power output condition, thermal power plant thermal power output condition, heat and electric power adjustment quantity provided by the microgrid, user category, user scheduling state, heat transmission delay and the like, the action functions of a user first heating electric regulating valve 401, a user second heating electric regulating valve 402, a microgrid heating electric regulating valve 403 and an electric boiler controller 404 in the microgrid participating in peak shaving assistance and the thermal power function of the thermal power plant D and the gas turbine cogeneration system 110 are worked out by using a nonlinear mixed integer programming algorithm, and the differential control is carried out on each microgrid participating in peak shaving and the internal users thereof.
Taking the control of a certain micro-grid participating in peak shaving and a certain user in the micro-grid in a wind power peak season as an example, the system controls the micro-grid in the following process:
when the wind power peak period comes, the system is adjusted as follows: assuming that the photovoltaic and wind power peak comes at time t, the time t for flowing hot water from the thermal power plant D to the heat exchanger 106 is required1The time period t required for the hot water to flow from the gas turbine cogeneration system 110 to the user heating radiator 105 is2The gas turbine side heat exchanger 109, the heat exchanger 106 and the electric boiler side heat exchanger 107 are closely spaced apart without considering thermal delay.
At the time t, the peak shaving auxiliary service center A sends a regulation and control instruction to the thermal power plant D through optical fibers to reduce the heat and electricity output of the thermal power plant D, the peak shaving auxiliary service center A sends a regulation and control instruction to the microgrid regulation and control center I through the optical fibers, the microgrid regulation and control center I sends a power regulation and control instruction to the gas turbine cogeneration system 110 and the electric boiler controller 404 according to the received regulation and control instruction, the heat and electricity output power of the gas turbine cogeneration system 110 is reduced, and the heating power of the directly-heated electric boiler 108 is increased; the heat quantity reduced by the gas turbine cogeneration system 110 is provided by the direct-heating electric boiler 108, and the generated energy reduced by the thermal power plant D and the gas turbine cogeneration system 110 and the newly added power consumption of the direct-heating electric boiler 108 are provided by photovoltaic and wind power.
At t + t1The heating power of the public heat supply network first-level pipe network to the heat supply network inside the microgrid is reduced by reducing the opening degree of the microgrid heat supply electric regulating valve 13, the heating power of the directly-heated electric boiler 108 is increased, and the newly-added power consumption of the directly-heated electric boiler 108 is provided by photovoltaic and wind power.
If at t + t1The heating power increased by the instant directly-heated electric boiler 108 is less than t + t1The reduction of the heat supply power of the public heat supply network primary pipe network to the heat supply network in the microgrid at the moment is t + t1+t2The first user heating electric regulating valve 401 is closed, and the opening degree of the second user heating electric regulating valve 402 is adjusted to reduce the heat exchange amount between the user heat load 104 of the user and the heat supply and demand of the heat supply network in the microgrid so as to balance the heat supply and demand of the heat supply network in the microgrid。
If at t + t1The heating power increased by the instant directly-heated electric boiler 108 is equal to t + t1The reduction of the heat supply power of the public heat supply network primary pipe network to the heat supply network in the microgrid at the moment is t + t1+t2The first heating electric control valve 401 and the second heating electric control valve 402 of the user are adjusted to be not actuated.
The invention relates to a micro-grid differential scheduling control system and method for peak shaving, which comprises the following steps: the system comprises a combined heat and power system, a microgrid difference measuring system, a user difference measuring system and a difference control system. The internal power line of the microgrid is connected with a public power grid through a connecting line, and the internal heat supply network of the microgrid is connected with a public heat supply network primary pipe network through a heat exchanger. Temporarily reducing the heat and electricity output of the thermal power plant when the wind power peak comes, and selecting the micro-grid meeting the conditions and the internal users thereof for unified control according to the difference of heat and electricity regulation capacity among the micro-grids, the difference of space distribution among the micro-grids and the difference of heat load size, category and controllable state of the users in the micro-grid; the heat exchange power of the heat supply network in the micro-grid and the primary pipe network of the public heat supply network is controlled, the heating power of the directly-heated electric boiler in the micro-grid, the heat and electricity output of the gas turbine cogeneration system and the heat load of users in the micro-grid are also controlled. The whole system improves the control precision, further excavates the peak regulation potential of the micro-grid and the internal users thereof, improves the consumption of green energy and reduces the peak regulation cost.
As shown in fig. 4, the present invention further provides a peak-shaving-oriented microgrid differentiated scheduling control method based on the system, including the steps of:
s1, the heat supply amount and the electric energy exchange amount of the public heat supply network primary pipe network to the heat supply network inside the microgrid, the power consumption amount of the directly-heated electric boiler 108 and the power consumption amount of the directly-heated electric boiler, and the heat and the power output amount of the gas turbine cogeneration system 110 to the heat supply network inside the microgrid are sent to a microgrid control center I.
S2, the microgrid control center I calculates the heat and electricity regulating quantity provided by each microgrid participating in peak shaving assistance through a nonlinear mixed integer programming algorithm according to the received data and the prediction data of the heat and electricity loads of the users in each microgrid under the constraint conditions of the thermoelectric output of the gas turbine cogeneration system, the electricity consumption and the heat production of the direct-heating electric boiler and the like; the microgrid control center I transmits the data to the peak shaving auxiliary service center A through optical fibers.
S1, sending the heat supply amount and the electric energy exchange amount of the public heat supply network primary pipe network to the heat supply network inside the microgrid, the heat supply amount, the electric energy consumption and the electric output amount inside the microgrid to a microgrid regulating and controlling center;
the heat supply amount, the power consumption amount and the electricity output amount inside the microgrid comprise the heat supply amount of the heat supply network inside the microgrid and the power consumption amount of the heat supply network, the heat and electricity output amount of the heat and electricity supply network inside the microgrid, and the like.
S2, the micro-grid regulation and control center calculates the heat and electricity regulation amount provided when each micro-grid participates in peak regulation and assistance through a nonlinear mixed integer programming algorithm under the constraint conditions of thermoelectric output, electricity consumption, heat production and the like of an internal system according to the received data and the prediction data of the heat and electricity loads of the users inside each micro-grid; the micro-grid regulation and control center transmits the data to the peak regulation auxiliary service center through optical fibers;
in this embodiment, the constraint conditions of the internal system such as the thermal power output, the power consumption, and the heat generation include the constraint conditions of the thermal power output, the power consumption, and the heat generation of the cogeneration system.
S3, the peak shaving auxiliary service center solves the thermoelectric output functions of the thermal power plant and the system according to the difference of each microgrid, the wind power output condition, the thermoelectric output condition of the thermal power plant, the heat and electric power adjustment amount which can be provided by each microgrid and the heat transmission delay constraint condition, determines that the microgrid meeting the condition participates in peak shaving, and sends the heat and electric power adjustment amount, sequence and duration which can be participated in peak shaving by the internal system to the microgrid control center.
In this embodiment, the internal system may include a cogeneration system, an electric boiler, and the like.
In this embodiment, the power output functions of the thermal power plant D and the cogeneration system 110 are programmed by a nonlinear mixed integer programming algorithm.
In this embodiment, preferably, in step S1, the microgrid control center I further receives user data of user categories, power consumption of users, heat consumption, and indoor temperature collected by the system.
The method comprises the following steps that a microgrid regulating and controlling center I collects the heat supply and electric energy exchange amount of a primary pipe network of a public heat supply network to a heat supply network in the microgrid and the heat supply, power consumption and electricity output amount in the microgrid through received power consumption, heat consumption and room temperature data information of users, then calculates the heat and electricity regulating amount provided when each microgrid (comprising an electric boiler, a cogeneration system and the like) participates in peak regulation assistance through nonlinear mixed integer programming calculation under the constraint conditions of thermoelectric output, power consumption, heat production and the like of systems in the microgrid, and feeds the heat and electricity regulating amount back to a peak regulation assistance service center A;
according to the difference of the microgrid and the internal users thereof, the peak shaving auxiliary service center (A) calculates thermoelectric output functions of the thermoelectric power plant D and the thermoelectric systems in the microgrid through a nonlinear mixed integer programming algorithm under the constraint conditions of wind power output condition, thermoelectric output condition of the thermoelectric power plant, heat and electric power adjustment quantity provided by the microgrid, user category, user scheduling state, heat transmission delay and the like, selects the microgrid meeting the conditions and the internal users thereof to participate in peak shaving, and sends corresponding adjustment instructions to the microgrid control center I.
In this embodiment, it is preferable that the control of the microgrid control center I for the heat supply load of the user and the heat supply load of the public heat supply network primary pipe network E for the heat supply network inside the microgrid and the heating power of the electric boiler is also considered, and the method specifically includes the following steps:
s11, firstly, classifying users by an embedded integrated touch screen J in the system according to the heat consumption duration of the users in one day, and obtaining the schedulable state of the users by comparing the heat consumption and room temperature real-time data of the users with the average value of the respective historical data; and then user data such as the heat consumption, the power consumption, the category, the schedulable state and the like of the user are sent to the micro-grid regulation and control center I.
S12, the microgrid control center I determines the adjustable quantity of the heat load of the users in the microgrid according to the heat consumption and the user scheduling state of the users in the microgrid; under the constraint conditions of thermoelectric output of a gas turbine, power consumption and heat generation of a directly-heated electric boiler and the like, the heat and electricity adjustment amount which can be provided when the micro-grid participates in peak regulation assistance is calculated through a nonlinear mixed integer programming algorithm, and user data and micro-grid data are sent to a peak regulation assistance service center A.
S13, the peak shaving auxiliary service center A selects the micro-grid and the internal users thereof meeting the requirements to participate in peak shaving according to the data of each micro-grid and the internal users thereof; under the constraint conditions of wind power output, thermoelectric output of a thermal power plant, heat and electricity regulating quantity provided by a microgrid, user category, user scheduling state, heat transmission delay and the like, nonlinear mixed integer programming calculation is used for obtaining the heat supply quantity of a microgrid regulating and controlling center I inside the microgrid participating in peak regulation for users, the heat supply quantity of a public heat grid primary pipe network E for the heat grid inside the microgrid and the action function for controlling the heating power of an electric boiler and the thermoelectric output functions of the thermal power plant D and a cogeneration system, and carrying out differential control on each microgrid participating in peak regulation and the internal users thereof.
Preferably, the present embodiment further includes determining whether the user is in a schedulable state, specifically including the following steps:
comparing the power consumption, the heat consumption and the room temperature real-time data of the user with the average value of the respective historical data stored in the system, if the real-time data of the user and the room temperature real-time data are both larger than the average value of the respective historical data, judging that the user is in a schedulable state, and if not, judging that the user is in a non-schedulable state.
This embodiment, according to user's heating historical information to user preset heat supply duration in working day one day is the limit, divides the user in the microgrid into two types: if the users with the heating time length longer than the preset heating time length in one day are classified into a first class, classifying other users with the heating time length less than or equal to the preset heating time length into a second class; this user information will be used as a basis for the peak shaving assistance service center a to preferentially select which users participate in the scheduling.
In this embodiment, the differentiated control of the internal user includes the following aspects:
among users of the same type: the control priority of the user with higher heating room temperature is lower than that of the user with lower heating room temperature;
the priorities of different types of user controls are different: the control priority of the second type of users is higher than that of the first type of users;
the room temperature of different types of users can fluctuate: the room temperature fluctuation range of the second type of users is larger than the room temperature fluctuation range of the first type of users;
the adjustable time lengths of different users: the controllable time length of the second type of users is longer than that of the first type of users.
The present invention is not limited to the above-mentioned preferred embodiments, and any structural changes made under the teaching of the present invention shall fall within the protection scope of the present invention, which has the same or similar technical solutions as the present invention.

Claims (10)

1. A micro-grid differential scheduling control system for peak shaving comprises:
the internal heat supply network of each micro-grid is respectively connected with a heat exchanger (106) and a public heat supply network primary pipe network (E); the system comprises a thermal power plant (D) and a first circulating pump (101) which are connected in series with a primary pipe network (E) of the public heat supply network;
the internal power line (H) of each micro-grid (K) is connected with one end of a public power grid (G) through a connecting line (102), and the other end of the public power grid (G) is connected with a centralized wind power generation system (B), a centralized photovoltaic power generation system (C) and the thermal power plant (D) in parallel;
the peak regulation auxiliary service center (A) is in communication connection with each micro-grid; each microgrid (K) is provided with a microgrid control center (I) which is in communication connection with the peak shaving auxiliary service center (A).
2. The peak-shaving oriented microgrid differential scheduling control system according to claim 1, characterized in that each microgrid (K) comprises a cogeneration system;
the microgrid difference measurement system is used for measuring the microgrid difference in the combined heat and power system and controlling the peak regulation capacity of the system;
the cogeneration system comprises a user electric load (103), a user heat load (104), a user heating radiator (105), a heat exchanger (106), an electric boiler end heat exchanger (107), a direct heating type electric boiler (108), a gas turbine end heat exchanger (109), a gas turbine cogeneration system (110) and a second circulating pump (111);
the micro-grid internal heat supply network (F) is used for connecting the user heating radiator (105), the heat exchanger (106), the electric boiler end heat exchanger (107), the gas turbine end heat exchanger (109) and the second circulating pump (111) in series; (K) a user heat load (104), a direct-heating electric boiler (108) and a gas turbine cogeneration system (110) are respectively connected with a user heating radiator (105), an electric boiler end heat exchanger (107) and a gas turbine end heat exchanger (109); (K) a user electrical load (103), a direct-heating electric boiler (108) and a gas turbine cogeneration system (110) are connected (K) in parallel to an internal power line (H);
the microgrid difference measurement system comprises (K) a microgrid regulation and control center (I), a microgrid heat consumption meter (301), an electric boiler electricity consumption meter (302), a gas turbine cogeneration system heat supply meter (303), a gas turbine cogeneration system power supply meter (304), an electric boiler heat supply meter (305) and a microgrid electricity consumption meter (306);
the microgrid heat consumption meter (301) is installed at a hot fluid inlet end of the heat exchanger (106);
the electric boiler electricity consumption meter (302) is arranged at the connection part of the directly-heated electric boiler (108) and the internal power line (H);
the heat supply meter (303) of the gas turbine cogeneration system is arranged at the cold fluid outlet end of the gas turbine end heat exchanger (109);
said gas turbine cogeneration system power supply meter (304) is installed at the connection of said gas turbine cogeneration system (110) and said internal power line (H);
the electric boiler heat supply meter (305) is arranged at the cold fluid outlet end of the electric boiler end heat exchanger (107);
the micro-grid electricity consumption meter (306) is a bidirectional electricity meter and is arranged at the joint of the internal power line (H) and the connecting line (102);
and the micro-grid regulation and control center (I) is connected with the peak regulation auxiliary service center (A) through optical fibers.
3. The peak shaver oriented microgrid differential scheduling control system of claim 2 further comprising a user differential measurement system:
the user difference measuring system comprises a user heat consumption meter (201), a room temperature sensor module (202), an embedded integrated touch screen (J) and a user electricity consumption meter (203);
the user electricity consumption meter (203) is arranged at the user electricity load (103) end, and the user heat consumption meter (201) is arranged at the user heating radiator (105) end;
the user heat consumption meter (201), the room temperature sensor module (202) and the user electricity consumption meter (203) are connected with the embedded integrated touch screen (J) through an RS485 bus, and collected user data information is sent to the embedded integrated touch screen (J); the embedded integrated touch screen (J) is connected with the micro-grid regulation and control center (I) through a local area network, and sends received user data information such as power consumption, heat consumption and room temperature to the micro-grid regulation and control center (I).
4. The peak-shaving-oriented microgrid differential scheduling control system according to claim 3, characterized in that the embedded integrated touch screen (J) stores the data information of the heat consumption and the room temperature of the user in its own storage module, and the stored data is the data information of the heat consumption and the room temperature of the user in a month; and comparing the real-time data of the heat consumption and the room temperature of the user with the average value of the respective historical data, if the real-time data of the heat consumption and the room temperature of the user are both larger than the average value of the respective historical data, judging that the user is in a schedulable state, if not, judging that the user is in a non-schedulable state, and feeding back the user information to the peak-shaving auxiliary service center (A).
5. The peak shaver oriented microgrid differential scheduling control system of claim 3, wherein said
The embedded integrated touch screen (J) divides users in the microgrid into two types by taking the preset heat supply time of the users in one day of a working day as a boundary according to the heating historical information of the users, if the heat supply time of the users in one day is greater than the preset heat supply time, the users are divided into a first type, other users which are less than or equal to the preset heat supply time are divided into a second type, and the user information is fed back to the peak regulation auxiliary service center (A).
6. The peak-shaving-oriented microgrid differential scheduling control system according to claim 4, characterized in that the preset heat supply time period is 15 hours.
7. The peak shaver oriented microgrid differential scheduling control system of claim 3 further comprising a differential control system;
the differentiation control system comprises a first user heating electric regulating valve (401), a second user heating electric regulating valve (402), a micro-grid heating electric regulating valve (403) and an electric boiler controller (404); the first user heating electric regulating valve (401) and the manual user heating regulating valve (501) are connected in series and then connected between the user heating radiator (105) and the heat exchanger (106), and the second user heating electric regulating valve (402) is connected in parallel with the first heating electric regulating valve (401) and the manual user heating regulating valve (501).
The first user heating electric regulating valve (401) and the second user heating electric regulating valve (402) are connected with the embedded integrated touch screen (J) through RS485 buses;
the micro-grid heat supply electric regulating valve (403) is arranged at the joint of the heat exchanger (106) and the public heat supply network primary pipe network (E) and is connected with the micro-grid regulating and controlling center (I) through a local area network;
the electric boiler controller (404) is connected with the directly-heated electric boiler (108) in series through a power supply line and is connected with the micro-grid regulation and control center (I) through a local area network.
8. A peak-shaving-oriented microgrid differential scheduling control method based on the system of any one of claims 1-7, characterized by comprising the following steps:
s1, sending the heat supply amount and the electric energy exchange amount of the public heat supply network primary pipe network to the heat supply network inside the microgrid, the heat supply amount, the electric energy consumption and the electric output amount inside the microgrid to a microgrid regulating and controlling center;
s2, the micro-grid regulation and control center calculates the heat and electricity regulation amount provided when each micro-grid participates in peak regulation and assistance through a nonlinear mixed integer programming algorithm under the constraint conditions of thermoelectric output, electricity consumption, heat production and the like of an internal system according to the received data and the prediction data of the heat and electricity loads of the users inside each micro-grid; the micro-grid regulation and control center transmits the data to the peak regulation auxiliary service center through optical fibers;
s3, the peak shaving auxiliary service center solves the thermoelectric output functions of the thermal power plant and the system according to the difference of each microgrid, the wind power output condition, the thermoelectric output condition of the thermal power plant, the heat and electric power adjustment amount which can be provided by each microgrid and the heat transmission delay constraint condition, determines that the microgrid meeting the condition participates in peak shaving, and sends the heat and electric power adjustment amount which can be participated in peak shaving by the internal system to the microgrid control center.
9. The peak-shaving-oriented microgrid differential scheduling control method according to claim 8, characterized in that in the step S1, the microgrid scheduling and control center further receives user data of power consumption, heat consumption and indoor temperature of users collected by a system;
the microgrid control center collects the heat supply and electric energy exchange amount of the primary public heat supply network to the heat supply network in the microgrid, the heat supply amount, the power consumption and the electricity output amount in the microgrid through the received power consumption, heat consumption and room temperature data information of users, calculates and calculates the heat and electric regulation amount provided when each microgrid participates in peak regulation assistance and feeds back the heat and electric regulation amount to the peak regulation assistance service center under the constraint conditions of thermoelectric output, power consumption, heat production and the like of the internal system in each microgrid;
the peak regulation auxiliary service center selects the micro-grid and the internal users thereof meeting the conditions to participate in peak regulation according to the differences of the micro-grid and the internal users thereof, under the constraint conditions of wind power output condition, thermal power plant thermal power output condition, thermal power supply regulating quantity and electric power regulating quantity provided by the micro-grid, user category, user scheduling state, heat transmission delay and the like, calculates the thermal power output functions of the thermal power plant and the internal thermal power systems in the micro-grid, selects the micro-grid and the internal users thereof meeting the conditions to participate in peak regulation, and sends corresponding regulation instructions to the micro-grid regulation center.
10. The peak-shaving-oriented microgrid differential scheduling control method according to claim 9, characterized in that the judgment of the user schedulable state includes the steps of:
comparing the power consumption, the heat consumption and the room temperature real-time data of the user with the average value of the respective historical data stored in the system, if the real-time data of the user and the room temperature real-time data are both larger than the average value of the respective historical data, judging that the user is in a schedulable state, and if not, judging that the user is in a non-schedulable state.
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