CN112528445B - Collaborative planning method and system for electricity-gas interconnection comprehensive energy system - Google Patents

Collaborative planning method and system for electricity-gas interconnection comprehensive energy system Download PDF

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CN112528445B
CN112528445B CN202011464888.6A CN202011464888A CN112528445B CN 112528445 B CN112528445 B CN 112528445B CN 202011464888 A CN202011464888 A CN 202011464888A CN 112528445 B CN112528445 B CN 112528445B
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李渊
陈永华
杨冬梅
杨志宏
刘刚
李蔚
傅金洲
陈卉
李梦阳
耿健
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Nari Technology Co Ltd
State Grid Electric Power Research Institute
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Abstract

The invention provides an electric-gas interconnected comprehensive energy system collaborative planning method considering reliability constraint, which comprises the steps of inputting parameter values required by electric-gas interconnected comprehensive energy system collaborative planning, constructing a collaborative planning main problem model, constructing an electric power system operation feasibility sub-problem model of an inspection collaborative planning scheme, constructing a natural gas system operation feasibility sub-problem model of the inspection collaborative planning scheme, constructing an electric-gas interconnected comprehensive energy system operation reliability sub-problem model of the inspection collaborative planning scheme, outputting an electric-gas interconnected comprehensive energy system collaborative planning scheme considering reliability constraint and the like, so that the problems of incomplete model construction, unreasonable solving method and the like in the traditional collaborative planning process are solved, and the basic guarantee effect of collaborative planning on safe, reliable and economic operation of an electric-gas interconnected comprehensive energy system is improved. The invention also provides an electric-gas interconnection comprehensive energy system collaborative planning system considering the reliability constraint.

Description

Collaborative planning method and system for electricity-gas interconnection comprehensive energy system
Technical Field
The invention relates to a comprehensive energy system planning technology, in particular to an electric-gas interconnection comprehensive energy system collaborative planning method considering reliability constraint.
Background
At present, the contradiction between energy demand increase and ecological environment protection in the world is increasingly prominent, natural gas becomes one of main power generation resources with the advantages of economy and environmental protection, and a power system and a natural gas system gradually show a deep coupling trend. Therefore, the operational reliability of the power system is also affected by the risk of the natural gas in the supply and transmission processes, and a new challenge is provided for the short-term operation and the long-term planning of the electricity-gas interconnected comprehensive energy system. When the system reliability is considered in the conventional collaborative planning method for the electricity-gas interconnection comprehensive energy system, a penalty function reflecting the shortage of system energy supply is generally added in a planning objective function to reflect the influence of the energy supply reliability, so that a compromise scheme comprehensively considering the system economy and the energy supply reliability is obtained.
In the prior art, for example, chinese patent with publication number CN111416349A discloses a collaborative planning method for an electrical interconnection comprehensive energy system. The method takes newly added equipment constraint, power distribution system constraint (externally connected power grid output constraint, distributed gas turbine unit output constraint, distribution network radial constraint, rotating reserve capacity constraint, distribution network constraint and reliability constraint) and natural gas system constraint (urban gate station output constraint, natural gas network constraint and natural gas abundance constraint) as constraint conditions, takes the minimum total cost (sum of investment cost and operation cost) of the comprehensive energy system as an optimization target, constructs a collaborative planning model of the comprehensive energy system, and can determine a collaborative planning scheme with lower cost and stable operation.
However, the prior art still has disadvantages. In the aspect of collaborative planning model construction, the consideration of reliability is embodied in that an economic cost penalty function corresponding to load loss is added into a target function, then reliability analysis is carried out on a proposed scheme and adjustment is carried out as required, the probability that the initially selected scheme obtained by the collaborative planning model constructed by the method does not meet the system reliability requirement is extremely high, and scientific and reasonable guide basis is lacked in scheme adjustment; in the prior art, in the aspect of collaborative planning model solution, continuous variable and integer variable decoupling is carried out on a model, a large-scale problem is decomposed, and sub-module alternate iterative solution is carried out.
Therefore, a new technical solution is needed to solve the above problems.
Disclosure of Invention
The purpose of the invention is as follows: the invention provides an electric-gas interconnection comprehensive energy system collaborative planning method considering reliability constraint aiming at the defects of collaborative planning model construction and solution in the prior art, and solves the problems of low reliability of a primary selection scheme, lack of basis for scheme adjustment and the like caused by unreasonable model construction and the problems of inaccurate solution result, unreasonable scheme and the like caused by simple emphasis on mathematical simplification skills due to neglecting the modularization characteristic of a planning problem in the model solving process.
The technical scheme is as follows: in order to achieve the purpose, the invention discloses an electric-gas interconnection comprehensive energy system collaborative planning method considering reliability constraint, which is characterized by comprising the following steps of:
(1) Constructing a collaborative planning main problem model taking the lowest total cost of the electricity-gas interconnected comprehensive energy system as a planning target, and obtaining a primary planning scheme according to the collaborative planning main problem model;
(2) Constructing a sub-problem model for checking the operation feasibility of the collaborative planning scheme power system to judge whether the primarily selected planning scheme obtained in the step (1) meets the operation feasibility requirement of the power system;
if the requirements are met, the main problem model constructed in the step (1) is considered to be a collaborative planning model considering the operation feasibility of the power system, the obtained primary selection planning scheme is an optimized planning scheme meeting the operation feasibility requirements of the power system, and the next step is carried out;
if the requirement is not met, constructing a power system operation feasibility correction model, circularly iterating the step (1) to the step (2), iteratively adding the power system operation feasibility correction model in a power system operation feasibility test criterion in the circulating process to form a power system operation feasibility test correction criterion, adding the power system operation feasibility test correction criterion into a collaborative planning main problem model to serve as a newly added constraint condition until the obtained optimized planning scheme meets the power system operation feasibility requirement, when the circulation is terminated, forming the main problem model which is the collaborative planning model considering the power system operation feasibility, obtaining the planning scheme which is the optimized planning scheme meeting the power system operation feasibility requirement, and entering the next step;
(3) Constructing a sub-problem model for testing the operation feasibility of the natural gas system of the collaborative planning scheme, and judging whether the obtained optimized planning scheme meeting the operation feasibility requirement of the power system meets the operation feasibility requirement of the natural gas system according to the operation feasibility test criterion of the natural gas system;
if the requirements are met, the collaborative planning model considering the operation feasibility of the power system is considered to be the collaborative planning model considering the operation feasibility of the electric-gas interconnected comprehensive energy system, the obtained optimized planning scheme meeting the operation feasibility requirements of the power system is the optimized planning scheme meeting the operation feasibility requirements of the electric-gas interconnected comprehensive energy system, and the next step is carried out;
if the requirement is not met, constructing a natural gas system operation feasibility correction model, circularly iterating the step (1) to the step (3), iteratively adding the natural gas system operation feasibility correction model in a natural gas system operation feasibility test criterion in the circulating process to form a natural gas system operation feasibility test correction criterion, adding the natural gas system operation feasibility test correction criterion into a collaborative planning main problem model to serve as a newly added constraint condition until the obtained optimization planning scheme meets the operation feasibility requirement of the electricity-gas interconnection comprehensive energy system, when the circulation is terminated, forming the main problem model which is the collaborative planning model considering the operation feasibility of the electricity-gas interconnection comprehensive energy system, and turning to the next step, wherein the obtained planning scheme is the optimization planning scheme meeting the operation feasibility requirement of the electricity-gas interconnection comprehensive energy system;
(4) Constructing a sub-problem model for testing the operation reliability of the electric-gas interconnection comprehensive energy system of the collaborative planning scheme, and judging whether the obtained optimized planning scheme meeting the operation feasibility requirement of the electric-gas interconnection comprehensive energy system meets the operation reliability requirement of the electric-gas interconnection comprehensive energy system or not according to an operation reliability test criterion of the electric-gas interconnection comprehensive energy system;
if the requirement is met, the collaborative planning model considering the operation feasibility of the electric-gas interconnected comprehensive energy system is considered to be the collaborative planning model considering the operation reliability of the electric-gas interconnected comprehensive energy system, and the obtained optimized planning scheme meeting the operation feasibility requirement of the electric-gas interconnected comprehensive energy system is the optimized planning scheme meeting the operation reliability requirement of the electric-gas interconnected comprehensive energy system;
if the requirement is not met, constructing an electric-gas interconnection comprehensive energy system operation reliability correction model, circularly iterating the step (1) to the step (4), in the circulation process, iteratively adding the electric-gas interconnection comprehensive energy system operation reliability correction model in an electric-gas interconnection comprehensive energy system operation reliability test criterion to form an electric-gas interconnection comprehensive energy system operation reliability test correction criterion, adding the electric-gas interconnection comprehensive energy system operation reliability test correction criterion to the collaborative planning main problem model to serve as a newly increased constraint condition until the obtained optimization planning scheme meets the electric-gas interconnection comprehensive energy system operation reliability requirement, when the circulation is terminated, the formed main problem model is the collaborative planning model considering the electric-gas interconnection comprehensive energy system operation reliability, and the obtained planning scheme is the optimization planning scheme meeting the electric-gas interconnection comprehensive energy system operation reliability requirement.
Corresponding to the collaborative planning method, the invention also provides an electric-gas interconnection comprehensive energy system collaborative planning system considering reliability constraint, which comprises the following steps:
the system comprises a first module, a second module and a third module, wherein the first module is internally provided with a collaborative planning main problem model with the lowest total cost of an electric-gas interconnected comprehensive energy system as a planning target, and obtains a primary planning scheme according to the collaborative planning main problem model;
the second module is internally provided with a sub-problem model for checking the operation feasibility of the power system and a power system operation feasibility correction model;
judging whether the primarily selected planning scheme obtained in the first module meets the requirement of the operation feasibility of the power system or not through a sub-problem model for checking the operation feasibility of the power system of the collaborative planning scheme;
if the requirements are met, the main problem model constructed by the first module is considered to be a collaborative planning model considering the operation feasibility of the power system, and the obtained primary selection planning scheme is an optimized planning scheme meeting the operation feasibility requirements of the power system;
if the requirement is not met, constructing a power system operation feasibility correction model, performing loop iteration, in the loop process, iteratively adding the power system operation feasibility correction model in the power system operation feasibility test criterion to form a power system operation feasibility test correction criterion, adding the power system operation feasibility test correction criterion into the collaborative planning main problem model to serve as a newly added constraint condition until the obtained optimized planning scheme meets the power system operation feasibility requirement, when the loop is terminated, the formed main problem model is the collaborative planning model considering the power system operation feasibility, and the obtained planning scheme is the optimized planning scheme meeting the power system operation feasibility requirement;
the third module is internally provided with a sub-problem model for testing the operation feasibility of the natural gas system and a natural gas system operation feasibility correction model;
judging whether the obtained optimized planning scheme meeting the operation feasibility requirement of the power system meets the operation feasibility requirement of the natural gas system or not according to the operation feasibility test criterion of the natural gas system by a sub-problem model for testing the operation feasibility of the natural gas system of the collaborative planning scheme;
if the requirements are met, the collaborative planning model considering the operation feasibility of the power system is considered to be the collaborative planning model considering the operation feasibility of the electric-gas interconnected comprehensive energy system, and the obtained optimized planning scheme meeting the operation feasibility requirements of the power system is the optimized planning scheme meeting the operation feasibility requirements of the electric-gas interconnected comprehensive energy system;
if the requirement is not met, iteratively adding a natural gas system operation feasibility correction model in a natural gas system operation feasibility test criterion through a natural gas system operation feasibility correction model and a loop iteration, wherein the natural gas system operation feasibility test correction criterion is formed and added to a collaborative planning main problem model to serve as a newly added constraint condition until the obtained optimization planning scheme meets the operation feasibility requirement of the electricity-gas interconnected comprehensive energy system, when the loop is terminated, the formed main problem model is the collaborative planning model considering the operation feasibility of the electricity-gas interconnected comprehensive energy system, and the obtained planning scheme is the optimization planning scheme meeting the operation feasibility requirement of the electricity-gas interconnected comprehensive energy system and is transferred to the next step;
a fourth module, wherein a sub-problem model for checking the operation reliability of the electric-gas interconnection comprehensive energy system of the collaborative planning scheme and an operation reliability correction model of the electric-gas interconnection comprehensive energy system are arranged in the fourth module;
judging whether the obtained optimized planning scheme meeting the operation feasibility requirement of the electric-gas interconnected comprehensive energy system meets the operation reliability requirement of the electric-gas interconnected comprehensive energy system or not according to a sub-problem model for testing the operation reliability of the electric-gas interconnected comprehensive energy system of the collaborative planning scheme and an operation reliability test criterion of the electric-gas interconnected comprehensive energy system;
if the requirement is met, the collaborative planning model considering the operation feasibility of the electric-gas interconnected comprehensive energy system is considered to be the collaborative planning model considering the operation reliability of the electric-gas interconnected comprehensive energy system, and the obtained optimized planning scheme meeting the operation feasibility requirement of the electric-gas interconnected comprehensive energy system is the optimized planning scheme meeting the operation reliability requirement of the electric-gas interconnected comprehensive energy system;
if the requirement is not met, iteratively adding an electric-gas interconnection comprehensive energy system operation reliability correction model in an electric-gas interconnection comprehensive energy system operation reliability test criterion through an electric-gas interconnection comprehensive energy system operation reliability correction model, circularly iterating, and in the circulating process, forming an electric-gas interconnection comprehensive energy system operation reliability test correction criterion, adding the electric-gas interconnection comprehensive energy system operation reliability test correction criterion into a collaborative planning main problem model to serve as a newly added constraint condition until the obtained optimization planning scheme meets the electric-gas interconnection comprehensive energy system operation reliability requirement, when the circulation is terminated, forming the main problem model which is the collaborative planning model considering the electric-gas interconnection comprehensive energy system operation reliability, and obtaining the planning scheme which is the optimization planning scheme meeting the electric-gas interconnection comprehensive energy system operation reliability requirement.
The invention has the beneficial effects that: the electric-gas interconnection comprehensive energy system collaborative planning method considering the reliability constraint is provided, the electric-gas interconnection comprehensive energy system collaborative planning problem is decomposed into a main problem taking the lowest total cost of the electric-gas interconnection comprehensive energy system as a planning target, a sub-problem for checking the operation feasibility of an electric power system of a collaborative planning scheme, a sub-problem for checking the operation feasibility of a natural gas system of the collaborative planning scheme and a sub-problem for checking the operation reliability of the electric power system of the collaborative planning scheme, a main problem model and sub-correction models corresponding to the sub-problems are established, and iterative solution is repeated until a collaborative planning investment scheme meeting the reliability, feasibility and economic constraint of the electric-gas interconnection comprehensive energy system is generated. The method has the advantages that the medium-long term planning process considering the reliability, feasibility and economy of the electric-gas interconnected comprehensive energy system is established, the problems of incomplete model structure, unreasonable solving method and the like in the traditional collaborative planning process are solved, and the basic guarantee level of the collaborative planning optimization scheme on the safe, reliable and economic operation of the electric-gas interconnected comprehensive energy system is improved.
The invention also provides a technical scheme of the electronic equipment, which comprises the following steps:
one or more processors; and a storage device for storing one or more programs which, when executed by the one or more processors, cause the one or more processors to implement the co-planning method described above.
The invention also provides a technical scheme of a computer readable medium, wherein a computer program is stored on the computer readable medium, and the computer program is executed by a processor to realize the collaborative planning method.
Drawings
FIG. 1 is a flow chart of a collaborative planning method for an electric-gas interconnected integrated energy system in consideration of reliability constraints according to the present invention;
fig. 2 is a schematic diagram of an IEEE 118 node system according to embodiment 1 of the present invention;
fig. 3 is a schematic view of a 14-node natural gas system in embodiment 1 of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
Example one
Referring to fig. 1, the present embodiment provides a collaborative planning method for an electrical-gas interconnection energy system considering reliability constraints, which includes the following steps.
Step 1: inputting parameter values required by the electric-gas interconnection comprehensive energy system collaborative planning;
step 2: constructing a collaborative planning main problem model taking the lowest total cost of the electricity-gas interconnected comprehensive energy system as a planning target, and obtaining a primary planning scheme according to the parameter values required by the collaborative planning input in the step 1;
and step 3: constructing a sub-problem model for checking the operation feasibility of the power system of the collaborative planning scheme, judging whether the primary planning scheme obtained in the step 2 meets the operation feasibility requirement of the power system according to an operation feasibility check criterion of the power system, if so, considering that the main problem model constructed in the step 2 is the collaborative planning model for considering the operation feasibility of the power system, obtaining an optimal planning scheme for meeting the operation feasibility requirement of the power system, turning to the step 4, if not, constructing a power system operation feasibility correction model, circularly iterating the steps 2 to 3, iteratively adding the power system operation feasibility correction model in the operation feasibility check criterion of the power system in a circulating process to form a power system operation feasibility check correction criterion, adding the power system operation feasibility check correction criterion into the collaborative planning main problem model as a newly-added constraint condition until the obtained optimal planning scheme meets the operation feasibility requirement of the power system, and when the circulation is terminated, forming the main problem model which is the collaborative planning model for considering the operation feasibility of the power system, and turning to the step 4;
and 4, step 4: constructing a sub-problem model for checking the operation feasibility of the natural gas system of the collaborative planning scheme, judging whether the obtained optimized planning scheme meeting the operation feasibility requirement of the electric power system meets the operation feasibility requirement of the natural gas system according to a natural gas system operation feasibility checking criterion, if so, considering that the collaborative planning model considering the operation feasibility of the electric power system is a collaborative planning model considering the operation feasibility of the electric-gas interconnected comprehensive energy system, obtaining an optimized planning scheme meeting the operation feasibility requirement of the electric power system, namely, the optimized planning scheme meeting the operation feasibility requirement of the electric-gas interconnected comprehensive energy system, turning to step 5, if not, constructing a natural gas system operation feasibility correction model, circularly iterating the steps from 2 to 4, iteratively adding a natural gas system operation feasibility correction model in the natural gas system operation feasibility checking criterion to form a natural gas system operation feasibility checking correction criterion, adding the natural gas system operation feasibility correction criterion into a collaborative planning main problem model as a newly added constraint condition until the obtained optimized planning scheme meets the operation feasibility requirement of the electric-gas interconnected comprehensive energy system, and forming a main problem model when circulation is terminated, namely, obtaining an optimized planning model considering the operation feasibility of the electric-gas interconnected comprehensive energy system operation planning model, and turning to step 5;
and 5: constructing a sub-problem model for checking the operation reliability of the electrical-gas interconnection comprehensive energy system in a collaborative planning scheme, judging whether the obtained optimization planning scheme meeting the operation feasibility requirement of the electrical-gas interconnection comprehensive energy system meets the operation reliability requirement of the electrical-gas interconnection comprehensive energy system according to the operation reliability check criterion of the electrical-gas interconnection comprehensive energy system, if so, considering that the collaborative planning model considering the operation feasibility of the electrical-gas interconnection comprehensive energy system is the collaborative planning model considering the operation reliability of the electrical-gas interconnection comprehensive energy system, obtaining the optimization planning scheme meeting the operation feasibility requirement of the electrical-gas interconnection comprehensive energy system, turning to step 6, if not, constructing an operation reliability correction model of the electrical-gas interconnection comprehensive energy system, circularly iterating steps 2 to 5, iteratively adding an operation reliability correction model of the electrical-gas interconnection comprehensive energy system in the operation reliability check criterion of the electrical-gas interconnection comprehensive energy system in a cyclic process, forming an operation reliability correction model of the electrical-gas interconnection comprehensive energy system, adding the electrical-gas interconnection comprehensive energy system in the operation reliability check criterion as the main operation constraint reliability correction model, obtaining the optimization planning scheme, and forming the electrical-gas interconnection comprehensive optimization planning scheme considering that the electrical-gas interconnection comprehensive energy system meets the operation constraint reliability requirement, turning to step 6;
step 6: and outputting a power-gas interconnection comprehensive energy system collaborative planning scheme considering reliability constraint.
The collaborative planning method for the electric-gas interconnected comprehensive energy system considering the reliability constraint is characterized in that the parameter values required by the collaborative planning of the electric-gas interconnected comprehensive energy system in the step 1 comprise the following steps: whether the existing generator set exists on the representation node or not, whether the existing power transmission line set exists on the representation node or not, whether the existing natural gas pipeline set exists on the representation node or not, whether the newly added generator set exists on the representation node or not, whether the newly added power transmission line set exists between the representation nodes or not, whether the newly added natural gas pipeline set exists between the representation nodes or not, a natural gas source set, a natural gas load set, a node association matrix, operation time, a carbon emission limit value, a carbon emission rate, a limit value capable of reducing load, load capable of reducing, load demand, system rotation standby demand, a planning period, new equipment installation and debugging duration, line reactance, a discount rate, a residual value coefficient, a generator set investment cost, a power transmission line investment cost, a natural gas pipeline investment cost, a bus-branch association matrix, a bus-generator association matrix, a bus-load association matrix, a node natural gas source association matrix, a fuel performance coefficient of a gas generator set and the like are represented.
Further, the collaborative planning main problem model with the lowest total cost of the electricity-gas interconnected comprehensive energy system as the planning target in the step 2 takes the lowest comprehensive of the newly-increased investment cost and the operation cost of the collaborative planning as the target, and considers the constraints of the new equipment installation and debugging time, the equipment operation state time sequence change, the total installed capacity of the system meeting the peak demand and the standby demand of load prediction, and the like, and the model can be expressed as follows:
Figure GDA0003710818150000081
Figure GDA0003710818150000082
Figure GDA0003710818150000083
Figure GDA0003710818150000084
Figure GDA0003710818150000085
Figure GDA0003710818150000086
Figure GDA0003710818150000087
Figure GDA0003710818150000088
Figure GDA0003710818150000089
in the formula, C is newly increased investment cost of collaborative planning, and the unit is ten thousand yuan; t is a planning cycle year index; i is a generator set index; l is a transmission line set index; p is a natural gas pipeline set index; b is a load partition set index; h is the running time set index in the planning cycle; CG is a set for representing whether a newly added generator set exists on a node or not; CL represents whether a newly added transmission line set exists between nodes; CP represents whether a new natural gas pipeline set exists between nodes; EG represents whether the existing generator set is collected on the characterization node; d is the discount rate; GIC is the investment cost of the generator set, and the unit is ten thousand yuan; FIC is the investment cost of the transmission line, and the unit is ten thousand yuan; PIC is investment cost of a natural gas pipeline, and the unit is ten thousand yuan; z is a binary variable representing the newly added state of the generator set, 1 is newly added, and 0 is not newly added; y is a binary variable representing the newly added state of the power transmission line, 1 is added, and 0 is not added; x is a binary variable representing the newly added state of the natural gas pipeline, 1 is newly added, and 0 is not newly added; DT is the running time, and the unit is h; OC is the operation cost, and the unit is ten thousand yuan/kW.h; p is the rated power of the generator and has the unit of kW; p max The unit is kW which is the maximum output of the generator; SV is the residual value; gamma is a residual coefficient; t is a planning period and the unit is year; t is com The installation and debugging time for new equipment is long, and the unit is year; PD is the load demand, and the unit is kW; r is the system rotation standby requirement, and the unit is kW.
Further, the sub-problem model for checking the operation feasibility of the collaborative planning scheme electric power system in the step 3 takes the minimum loss of the system electric power load as a target, and considers the constraints of the generator set capacity constraint, the system emission limit, the branch power flow constraint of the power transmission line and the like, and the model can be expressed as follows:
Figure GDA0003710818150000091
S.t.
K*PL lbht ＝A*P ibht -B*(PD bht -DL bht ) (11)
Figure GDA0003710818150000092
Figure GDA0003710818150000093
Figure GDA0003710818150000094
Figure GDA0003710818150000095
Figure GDA0003710818150000096
Figure GDA0003710818150000097
Figure GDA0003710818150000098
θ ref ＝0 (19)
in the formula, t is a planning cycle year index; i is a generator set index; l is a transmission line set index; b is a load partition set index; h is a running time set index in a planning period; m is a bus head end node set index (bus set index); n is a bus tail end node set index; EG represents whether the existing generator set is collected on the characterization node; EL represents whether the existing transmission line set exists on the node; CG is a set for representing whether a newly-added generator set exists on the node; CL represents whether a newly added transmission line set exists between nodes; DL is reducible load, and the unit is kW; k is a bus-branch incidence matrix; a is a bus-generator incidence matrix; b is a bus-load incidence matrix; PL is branch power flow, and the unit is kW; p is the rated power of the generator and has the unit of kW; PD is the load demand, and the unit is kW; p max The unit is kW which is the maximum output of the generator;
Figure GDA0003710818150000101
a binary variable for representing the newly added state of the generator set in the last iteration is represented, wherein 1 is newly added, and 0 is not newly added;
Figure GDA0003710818150000102
1 is a new variable and 0 is a non-new variable for representing the newly added state of the power transmission line in the last iteration; EM is carbon emission rate, and the unit is kg/(h.kW); DT is the running time, and the unit is h; EML is the limit of carbon emission in kg; theta is a voltage phase angle; x is the line reactance; m is a large number.
The collaborative planning method for the electricity-gas interconnection comprehensive energy system considering the reliability constraint is characterized in that the electric power system operation feasibility test criterion in the step 3 can be expressed as:
Figure GDA0003710818150000103
in the formula, t is a planning cycle year index; b is a load partition set index; h is a running time set index in a planning period; DL is reducible load, and the unit is kW; DL max The unit is kW to limit the load to be reduced.
The collaborative planning method for the electric-gas interconnected comprehensive energy system considering the reliability constraint is characterized in that the electric power system operation feasibility correction model in the step 3 can be expressed as follows:
Figure GDA0003710818150000104
in the formula, V is the operation feasibility correction of the power system, and the unit is kW; t is a planning cycle year index; i is a generator set index; b is a load partition set index; h is a running time set index in a planning period; p max The unit is kW which is the maximum output of the generator; z is a binary variable representing the newly added state of the generator set, 1 is newly added, and 0 is not newly added;
Figure GDA0003710818150000105
and (4) adding 1 and not adding 0 to the binary variable for representing the newly added state of the generator set in the last iteration.
Further, the criterion for checking and correcting the operation feasibility of the power system in step 3 may be represented as:
Figure GDA0003710818150000106
in the formula, t is a planning cycle year index; i is a generator set index; b is a load partition set index; h is a running time set index in a planning period; DL is reducible load, and the unit is kW; DL max The unit is kW for the limit value of the reducible load; v is the power system operation feasibility correction in kW.
According to the electricity-gas interconnection comprehensive energy system collaborative planning method considering the reliability constraint, the subproblem model for checking the operation feasibility of the collaborative planning scheme natural gas system in the step 4 aims at minimizing the imbalance of supply and demand of the natural gas nodes, considers the constraints of zero net injection of the nodes, load capacity constraint of the natural gas nodes, injection capacity constraint of the natural gas nodes, flow constraint of the natural gas pipeline and the like, and can be expressed as
Min W bht ＝1 T *ω 1 +1 T *ω 2 (23)
Figure GDA0003710818150000111
F ibht ＝a i +b i P ibht +c i (P ibht ) 2 (25)
L gbht ＝F ibht (P ibht ) (26)
Figure GDA0003710818150000112
Figure GDA0003710818150000113
Figure GDA0003710818150000114
Figure GDA0003710818150000115
Wherein W is the supply and demand unbalance of natural gas nodes and the unit is m 3 H; t is a planning cycle year index; i is a generator set index; l is transmission line set index; sp is natural gas source set index; g is natural gas load set index; p is a natural gas pipeline set index; j is a unit of a groupIndexing natural gas pipe network nodes; b is a load partition set index; h is the running time set index in the planning cycle; CP represents whether a new natural gas pipeline set exists between nodes; EP is a set for representing whether existing natural gas pipelines exist on the node; NGS is a natural gas source set; NGL is a natural gas load set; g (j) is a node set communicated with the node j; t is a planning period and the unit is year; omega is a relaxation variable vector; e is a node natural gas source incidence matrix; d is a node natural gas load incidence matrix; v is the gas supply quantity of a natural gas source and is in m 3 H; l is the natural gas load in m 3 H; f is the natural gas pipeline flow rate and the unit is m 3 H; f is the natural gas consumption of the gas unit, and the unit is m 3 H; p is the rated power of the generator and has the unit of kW; a, b and c are fuel performance coefficients of the gas turbine set;
Figure GDA0003710818150000121
and (3) representing a binary variable of the newly added state of the natural gas pipeline in the last iteration, wherein 1 is added, and 0 is not added.
Further, the natural gas system operation feasibility test criterion in step 4 can be expressed as:
W bht ≤ε bht (31)
in the formula, t is a planning cycle year index; b is a load partition set index; h is the running time set index in the planning cycle; w is the supply and demand unbalance of natural gas nodes, and the unit is m 3 H; epsilon is a preset difference of supply and demand unbalance of the natural gas node and is m 3 /h。
Further, the natural gas system operation feasibility correction model in step 4 may be expressed as:
Figure GDA0003710818150000122
wherein Y is the correction quantity of the natural gas system operation feasibility and is expressed in m 3 H; t is the year index of the planning cycle; i is a generator set index; p is natural gas pipeline set index(ii) a b is a load partition set index; h is a running time set index in a planning period; CG is a set for representing whether a newly-added generator set exists on the node; CP is the representation node whether there is a new natural gas pipeline set; f is the natural gas consumption of the gas unit, and the unit is m 3 H; p is the rated power of the generator and has the unit of kW; f is the natural gas pipeline flow rate and the unit is m 3 H; z is a binary variable representing the newly added state of the generator set, 1 is newly added, and 0 is not newly added;
Figure GDA0003710818150000123
a binary variable for representing the newly added state of the generator set in the last iteration is added, wherein 1 is added, and 0 is not added; x is a binary variable representing the newly added state of the natural gas pipeline, 1 is newly added, and 0 is not newly added;
Figure GDA0003710818150000124
and (3) representing a binary variable of the newly added state of the natural gas pipeline in the last iteration, wherein 1 is added, and 0 is not added.
Further, the natural gas system operation feasibility test correction criterion in step 4 may be expressed as:
W bht +Y bht ≤ε bht (33)
in the formula, t is a planning cycle year index; i is a generator set index; b is a load partition set index; h is a running time set index in a planning period; y is the correction quantity of the natural gas system operation feasibility, and the unit is m 3 H; w is the supply and demand unbalance of the natural gas node, and the unit is m 3 H; y is the correction quantity of the natural gas system operation feasibility, and the unit is m 3 H; epsilon is a preset difference of supply and demand unbalance of the natural gas node and is m 3 /h。
Further, the sub-problem model for checking the operation reliability of the electrical-gas interconnection comprehensive energy system of the collaborative planning scheme in the step 5 aims at minimizing the imbalance of the supply and demand of the power grid node, considers the constraints of the capacity of the generator set, the branch flow constraint of the power transmission line and the like, and can be expressed as follows:
Min S bht ＝1 T *s 1 +1 T *s 2 (34)
S.t.
K*PL lbht +s 1 -s 2 ＝A*P ibht -B*PD bht (35)
Figure GDA0003710818150000131
Figure GDA0003710818150000132
Figure GDA0003710818150000133
Figure GDA0003710818150000134
Figure GDA0003710818150000135
Figure GDA0003710818150000136
θ ref ＝0 (42)
in the formula, S is the unbalance amount of the power supply and demand of the power grid node, and the unit is kW; t is the year index of the planning cycle; i is a generator set index; m is a bus head end node set index (bus set index); n is a bus terminal node set index; l is a transmission line set index; b is a load partition set index; h is a running time set index in a planning period; CG is a set for representing whether a newly added generator set exists on a node or not; CL represents whether a newly added transmission line set exists between nodes; EG represents whether the existing generator set is collected on the characterization node; the EL represents whether the existing power transmission line set exists on the node or not; z is characteristic of electricity generationThe binary variable of the newly added state of the unit is 1, and is not added, and 1 is added; y is a binary variable representing the newly added state of the power transmission line, 1 is added, and 0 is not added; t is a planning period and the unit is year; s is a relaxation variable vector; k is a bus-branch incidence matrix; a is a bus-generator incidence matrix; b is a bus-load incidence matrix; PL is branch flow, and the unit is kW; p is the rated power of the generator and has the unit of kW; PD is the load demand, and the unit is kW; p max The unit is kW which is the maximum output of the generator; theta is a voltage phase angle; x is the line reactance; m is a large number.
Further, the criterion for testing the operational reliability of the electrical-gas interconnection comprehensive energy system in the step 5 can be expressed as:
Figure GDA0003710818150000141
Figure GDA0003710818150000142
in the formula, t is a planning cycle year index; b is a load partition set index; h is a running time set index in a planning period; EENS is the system energy shortage in kW.h; DT is the running time, and the unit is h; and S is the supply and demand unbalance of the power grid node, and the unit is kW.
Further, the electric-gas interconnection comprehensive energy system operation reliability correction model in step 5 can be expressed as:
Figure GDA0003710818150000143
in the formula, Z is the operation reliability correction quantity of the electric-gas interconnection comprehensive energy system, and the unit is kW; t is a planning cycle year index; i is a generator set index; l is a transmission line set index; b is a load partition set index; h is the running time set index in the planning cycle; CG is a set for representing whether a newly added generator set exists on a node or not; CL represents whether new transmission exists between nodesA line set; PL is branch power flow, and the unit is kW; p is the rated power of the generator and has the unit of kW; z is a binary variable representing the newly added state of the generator set, 1 is newly added, and 0 is not newly added;
Figure GDA0003710818150000145
a binary variable for representing the newly added state of the generator set in the last iteration is added, wherein 1 is added, and 0 is not added; y is a binary variable representing the newly added state of the power transmission line, 1 is newly added, and 0 is not newly added;
Figure GDA0003710818150000146
and (4) representing a binary variable of the newly added state of the power transmission line in the last iteration, wherein 1 is added, and 0 is not added.
Further, the criterion for checking and correcting the operational reliability of the integrated energy system considering the electrical-electrical interconnection in step 5 can be expressed as:
Figure GDA0003710818150000144
in the formula, t is a planning cycle year index; b is a load partition set index; h is a running time set index in a planning period; EENS is the system energy shortage in kW.h; and Z is the operation reliability correction quantity of the electric-gas interconnection comprehensive energy system, and the unit is kW.
Further, the electric-gas interconnection energy system collaborative planning scheme considering the reliability constraint in step 6 includes: the method comprises the steps of adding a node where a generator set is located, adding a rated capacity of the generator set, adding a number of nodes at the head and the tail of a power transmission line, adding a rated current-carrying capacity of the power transmission line, adding a number of nodes at the head and the tail of a natural gas pipeline, adding a rated flow of the natural gas pipeline, investment cost, operation cost and the like.
Based on the collaborative planning method provided by the embodiment, the method is applied to a specific case for verification:
an electric-gas interconnection comprehensive energy system formed by coupling an IEEE 118 node power system (shown in figure 2) and a 14 node natural gas system (shown in figure 3) is selected, and the research and planning period is 20 years. The power system comprises 118 buses, 186 branches, 54 power nodes and 91 load nodes, 16 candidate natural gas generator sets and 8 candidate power transmission lines. The natural gas system comprises 14 nodes, 11 pipelines and 3 gas source nodes, wherein the candidate natural gas pipelines are 3, and the system supplies power for the natural gas generator set and the non-power generation gas load. The load in each month in the planning year is supposed to be divided into three typical load values (valley value, waist value and peak value), the time ratio of the three typical load values to each medium load value in each month is different, the initial power load value is 5400MW, the average annual increase rate is 3%, the rotating standby consideration is 5% of the load value, and the average annual increase rate of the non-power generation natural gas load is 1.5%. In the first planned year, the system energy shortage limit is considered to be 160MWh, and the annual increase is 3%. The total power generation amount in the planning period is limited to 4300MWh. The average electricity price was 0.05rmb/kWh and was considered to remain unchanged for the planning period. The residual coefficient was 5%. The total investment cost and the newly increased equipment quantity are not limited. According to the electric-gas interconnection comprehensive energy system collaborative planning method considering the reliability constraint, a collaborative planning optimization scheme can be obtained through calculation.
The values of the input parameters required for partial co-planning are shown in tables 1 to 6.
The values of the parameters covered by the partial co-planning scheme are shown in tables 7 to 10.
Table 1 newly added transmission line parameters
Figure GDA0003710818150000151
TABLE 2 parameters of the newly added natural gas pipeline
Figure GDA0003710818150000152
Figure GDA0003710818150000161
TABLE 3 Current Natural gas pipeline parameters
Figure GDA0003710818150000162
TABLE 4 Natural gas load parameters
Year t Natural gas load L (m) 3 /h) Year t Natural gas load L (m) 3 /h)
1 96986 11 111498
2 98430 12 113636
3 100044 13 115186
4 101460 14 117030
5 102677 15 118647
6 103810 16 120321
7 105141 17 121683
8 106840 18 123868
9 107973 19 125910
10 110278 20 128322
TABLE 5 Natural gas Source parameters
Figure GDA0003710818150000171
TABLE 6 carbon emissions parameters
Figure GDA0003710818150000172
TABLE 7 newly-added parameters of generator set and year of delivery
Figure GDA0003710818150000173
Figure GDA0003710818150000181
Table 8 newly added transmission line parameters and year of commissioning
Figure GDA0003710818150000182
TABLE 9 New natural gas pipeline parameters and year of delivery
Figure GDA0003710818150000183
TABLE 10 Co-planning optimization scheme costs
Figure GDA0003710818150000184
Example two
Corresponding to the collaborative planning method provided by the first embodiment, the invention further provides an electric-gas interconnection comprehensive energy system collaborative planning system considering reliability constraint, which includes:
the system comprises a first module, a second module and a third module, wherein the first module is internally provided with a collaborative planning main problem model taking the lowest total cost of an electric-gas interconnection comprehensive energy system as a planning target, and obtains a primary planning scheme according to the collaborative planning main problem model;
the second module is internally provided with a sub-problem model for checking the operation feasibility of the power system and a power system operation feasibility correction model;
judging whether the primarily selected planning scheme obtained in the first module meets the requirement of the operation feasibility of the power system or not through a sub-problem model for checking the operation feasibility of the power system of the collaborative planning scheme;
if the requirements are met, the main problem model constructed by the first module is considered to be a collaborative planning model considering the operation feasibility of the power system, and the obtained primary selection planning scheme is an optimized planning scheme meeting the operation feasibility requirements of the power system;
if the requirement is not met, constructing a power system operation feasibility correction model, performing loop iteration, in the loop process, iteratively adding the power system operation feasibility correction model in the power system operation feasibility test criterion to form a power system operation feasibility test correction criterion, adding the power system operation feasibility test correction criterion into the collaborative planning main problem model to serve as a newly added constraint condition until the obtained optimized planning scheme meets the power system operation feasibility requirement, when the loop is terminated, the formed main problem model is the collaborative planning model considering the power system operation feasibility, and the obtained planning scheme is the optimized planning scheme meeting the power system operation feasibility requirement;
the third module is internally provided with a sub-problem model for testing the operation feasibility of the natural gas system and a natural gas system operation feasibility correction model;
judging whether the obtained optimized planning scheme meeting the operation feasibility requirement of the power system meets the operation feasibility requirement of the natural gas system or not according to the operation feasibility test criterion of the natural gas system by a sub-problem model for testing the operation feasibility of the natural gas system of the collaborative planning scheme;
if the requirement is met, the collaborative planning model considering the operation feasibility of the power system is considered to be the collaborative planning model considering the operation feasibility of the electricity-gas interconnected comprehensive energy system, and the obtained optimized planning scheme meeting the operation feasibility requirement of the power system is the optimized planning scheme meeting the operation feasibility requirement of the electricity-gas interconnected comprehensive energy system;
if the requirement is not met, iteratively adding a natural gas system operation feasibility correction model in a natural gas system operation feasibility test criterion through a natural gas system operation feasibility correction model and a loop iteration, wherein the natural gas system operation feasibility test correction criterion is formed and added to a collaborative planning main problem model to serve as a newly added constraint condition until the obtained optimization planning scheme meets the operation feasibility requirement of the electricity-gas interconnected comprehensive energy system, when the loop is terminated, the formed main problem model is the collaborative planning model considering the operation feasibility of the electricity-gas interconnected comprehensive energy system, and the obtained planning scheme is the optimization planning scheme meeting the operation feasibility requirement of the electricity-gas interconnected comprehensive energy system and is transferred to the next step;
the fourth module is internally provided with a sub-problem model for testing the operation reliability of the electric-gas interconnection comprehensive energy system and an electric-gas interconnection comprehensive energy system operation reliability correction model of the collaborative planning scheme;
judging whether the obtained optimized planning scheme meeting the operation feasibility requirement of the electric-gas interconnected comprehensive energy system meets the operation reliability requirement of the electric-gas interconnected comprehensive energy system or not according to a sub-problem model for testing the operation reliability of the electric-gas interconnected comprehensive energy system of the collaborative planning scheme and an operation reliability test criterion of the electric-gas interconnected comprehensive energy system;
if the requirement is met, the collaborative planning model considering the operation feasibility of the electric-gas interconnection comprehensive energy system is considered to be the collaborative planning model considering the operation reliability of the electric-gas interconnection comprehensive energy system, and the obtained optimized planning scheme meeting the operation feasibility requirement of the electric-gas interconnection comprehensive energy system is the optimized planning scheme meeting the operation reliability requirement of the electric-gas interconnection comprehensive energy system;
if the requirement is not met, iteratively adding an electric-gas interconnection comprehensive energy system operation reliability correction model in an electric-gas interconnection comprehensive energy system operation reliability test criterion through an electric-gas interconnection comprehensive energy system operation reliability correction model, circularly iterating, and in the circulating process, forming an electric-gas interconnection comprehensive energy system operation reliability test correction criterion, adding the electric-gas interconnection comprehensive energy system operation reliability test correction criterion into a collaborative planning main problem model to serve as a newly added constraint condition until the obtained optimization planning scheme meets the electric-gas interconnection comprehensive energy system operation reliability requirement, when the circulation is terminated, forming the main problem model which is the collaborative planning model considering the electric-gas interconnection comprehensive energy system operation reliability, and obtaining the planning scheme which is the optimization planning scheme meeting the electric-gas interconnection comprehensive energy system operation reliability requirement.
The models and test criteria in the second embodiment are the same as those in the first embodiment, and are not described herein again.
The above embodiments may be implemented by software in combination with necessary hardware. Therefore, the technical solution according to the embodiment of the present disclosure may be embodied in the form of a software product, where the software product may be stored in a nonvolatile storage medium (which may be an optical disc, a usb disk, a mobile hard disk, or the like) or on a network server or a cloud server, and includes a plurality of instructions to enable a computing device (which may be a personal computer, a server, or a network device, or the like) to execute the method according to the first embodiment of the present disclosure, which is not described herein again.

Claims (9)

1. A collaborative planning method for an electricity-gas interconnection comprehensive energy system is characterized by comprising the following steps:
(1) Constructing a collaborative planning main problem model taking the lowest total cost of the electricity-gas interconnected comprehensive energy system as a planning target, and obtaining a primary planning scheme according to the collaborative planning main problem model;
(2) Constructing a sub-problem model for checking the operation feasibility of the power system of the collaborative planning scheme to judge whether the initially selected planning scheme obtained in the step (1) meets the operation feasibility requirement of the power system;
if the requirements are met, the main problem model constructed in the step (1) is considered to be a collaborative planning model considering the operation feasibility of the power system, the obtained primary selection planning scheme is an optimized planning scheme meeting the operation feasibility requirements of the power system, and the next step is carried out;
if the requirements are not met, constructing a power system operation feasibility correction model, circularly iterating the steps (1) to (2), in the circulating process, iteratively adding the power system operation feasibility correction model in a power system operation feasibility test criterion to form a power system operation feasibility test correction criterion, adding the power system operation feasibility test correction criterion into a collaborative planning main problem model to serve as a newly increased constraint condition until the obtained optimized planning scheme meets the power system operation feasibility requirement, when the circulation is terminated, forming the main problem model which is the collaborative planning model considering the power system operation feasibility, obtaining the planning scheme which is the optimized planning scheme meeting the power system operation feasibility requirement, and entering the next step;
(3) Constructing a sub-problem model for testing the operation feasibility of the natural gas system of the collaborative planning scheme, and judging whether the obtained optimized planning scheme meeting the operation feasibility requirement of the power system meets the operation feasibility requirement of the natural gas system according to the operation feasibility test criterion of the natural gas system;
if the requirement is met, the collaborative planning model considering the operation feasibility of the power system is considered to be the collaborative planning model considering the operation feasibility of the electricity-gas interconnected comprehensive energy system, the obtained optimized planning scheme meeting the operation feasibility requirement of the power system is the optimized planning scheme meeting the operation feasibility requirement of the electricity-gas interconnected comprehensive energy system, and the next step is carried out;
if the requirement is not met, constructing a natural gas system operation feasibility correction model, circularly iterating the step (1) to the step (3), iteratively adding the natural gas system operation feasibility correction model in a natural gas system operation feasibility test criterion in the circulating process to form a natural gas system operation feasibility test correction criterion, adding the natural gas system operation feasibility test correction criterion into a collaborative planning main problem model to serve as a newly added constraint condition until the obtained optimization planning scheme meets the operation feasibility requirement of the electricity-gas interconnection comprehensive energy system, when the circulation is terminated, forming the main problem model which is the collaborative planning model considering the operation feasibility of the electricity-gas interconnection comprehensive energy system, and turning to the next step, wherein the obtained planning scheme is the optimization planning scheme meeting the operation feasibility requirement of the electricity-gas interconnection comprehensive energy system;
(4) Constructing a sub-problem model for testing the operation reliability of the electric-gas interconnection comprehensive energy system of the collaborative planning scheme, and judging whether the obtained optimized planning scheme meeting the operation feasibility requirement of the electric-gas interconnection comprehensive energy system meets the operation reliability requirement of the electric-gas interconnection comprehensive energy system or not according to an operation reliability test criterion of the electric-gas interconnection comprehensive energy system;
if the requirement is met, the collaborative planning model considering the operation feasibility of the electric-gas interconnection comprehensive energy system is considered to be the collaborative planning model considering the operation reliability of the electric-gas interconnection comprehensive energy system, and the obtained optimized planning scheme meeting the operation feasibility requirement of the electric-gas interconnection comprehensive energy system is the optimized planning scheme meeting the operation reliability requirement of the electric-gas interconnection comprehensive energy system;
if the requirement is not met, constructing an electric-gas interconnection comprehensive energy system operation reliability correction model, circularly iterating the step (1) to the step (4), in the circulating process, iteratively adding the electric-gas interconnection comprehensive energy system operation reliability correction model in the electric-gas interconnection comprehensive energy system operation reliability test criterion to form an electric-gas interconnection comprehensive energy system operation reliability test correction criterion, adding the electric-gas interconnection comprehensive energy system operation reliability test correction criterion to the collaborative planning main problem model to serve as a newly added constraint condition, until the obtained optimization planning scheme meets the electric-gas interconnection comprehensive energy system operation reliability requirement, when the circulation is terminated, the formed main problem model is the collaborative planning model considering the electric-gas interconnection comprehensive energy system operation reliability, and the obtained planning scheme is the optimization planning scheme meeting the electric-gas interconnection comprehensive energy system operation reliability requirement;
the collaborative planning main problem model taking the lowest total cost of the electricity-gas interconnection comprehensive energy system as a planning target in the step (1) is expressed as follows:
Min C
Figure FDA0003781280300000021
Figure FDA0003781280300000022
Figure FDA0003781280300000023
Figure FDA0003781280300000024
Figure FDA0003781280300000025
Figure FDA0003781280300000026
Figure FDA0003781280300000031
Figure FDA0003781280300000032
Figure FDA0003781280300000033
in the formula, C is newly increased investment cost of collaborative planning; t is the year index of the planning cycle; i is a generator set index; l is transmission line set index; p is a natural gas pipeline set index; b is a load partition set index; h is a running time set index in a planning period; CG is a set for representing whether a newly added generator set exists on a node or not; CL represents whether a newly added transmission line set exists between nodes; CP represents whether a new natural gas pipeline set exists between nodes; EG represents whether the existing generator set is collected on the characterization node; d is the discount rate; GIC is the generator set investment cost; FIC is the investment cost of the transmission line; PIC is the investment cost of the natural gas pipeline; z is a binary variable representing the newly added state of the generator set, 1 is added, and 0 is not addedAdding; y is a binary variable representing the newly added state of the power transmission line, 1 is newly added, and 0 is not newly added; x is a binary variable representing the newly added state of the natural gas pipeline, 1 is newly added, and 0 is not newly added; DT is the running time; OC is the operating cost; p is the rated power of the generator; p max The maximum output of the generator is obtained; SV is the residual value; gamma is a coefficient of residual value; t is a planning period; t is com Installing a debugging time for the new equipment; PD is the load demand; and R is the system rotation standby requirement.
2. The collaborative planning method according to claim 1, wherein: the electric power system operation feasibility test criterion in the step 3 in the step (2) is shown as follows:
Figure FDA0003781280300000034
in the formula, t is a planning cycle year index; b is a load partition set index; h is a running time set index in a planning period; DL is to reduce the load; DL max A limit value for reducing the load;
the power system operation feasibility correction model is expressed as follows:
Figure FDA0003781280300000035
in the formula, V is the correction quantity of the operation feasibility of the power system; t is a planning cycle year index; i is a generator set index; b is a load partition set index; h is a running time set index in a planning period; p max The maximum output of the generator is obtained; z is a binary variable representing the newly added state of the generator set, 1 is newly added, and 0 is not newly added;
Figure FDA0003781280300000037
a binary variable for representing the newly added state of the generator set in the last iteration is added, wherein 1 is added, and 0 is not added;
the power system operation feasibility test correction criterion is expressed as:
Figure FDA0003781280300000036
in the formula, t is a planning cycle year index; i is a generator set index; b is a load partition set index; h is a running time set index in a planning period; DL is to reduce the load; DL max A limit value for reducing the load; and V is the operation feasibility correction quantity of the power system.
3. The collaborative planning method according to claim 1, wherein: the subproblem model for checking the operation feasibility of the collaborative planning scheme natural gas system in the step (3) is expressed as
Min W bht ＝1 T *ω 1 +1 T *ω 2
Figure FDA0003781280300000041
F ibht ＝a i +b i P ibht +c i (P ibht ) 2
L gbht ＝F ibht (P ibht )
Figure FDA0003781280300000042
Figure FDA0003781280300000043
Figure FDA0003781280300000044
Figure FDA0003781280300000045
In the formula, W is the supply and demand unbalance of the natural gas node; t is the year index of the planning cycle; i is a generator set index; l is transmission line set index; sp is natural gas source set index; g is natural gas load set index; p is a natural gas pipeline set index; j is a natural gas pipe network node index; b is a load partition set index; h is the running time set index in the planning cycle; CP represents whether a new natural gas pipeline set exists between nodes; EP is a set for representing whether existing natural gas pipelines exist on the node; NGS is a natural gas source set; NGL is a natural gas load set; g (j) is a node set communicated with the node j; t is a planning period and the unit is year; omega is a relaxation variable vector; e is a node natural gas source incidence matrix; d is a node natural gas load incidence matrix; v is the gas supply quantity of the natural gas source; l is the natural gas load; f is the natural gas pipeline flow; f is the natural gas consumption of the gas unit; p is the rated power of the generator; a, b and c are fuel performance coefficients of the gas turbine set;
Figure FDA0003781280300000046
and 1 is a new variable and 0 is a non-new variable for representing the newly added state of the natural gas pipeline in the last iteration.
4. The collaborative planning method according to claim 1 or 3, wherein: the natural gas system operation feasibility test criterion in the step (3) is expressed as:
W bht ≤ε bht
in the formula, t is a planning cycle year index; b is a load partition set index; h is a running time set index in a planning period; w is the supply and demand unbalance of the natural gas node; epsilon is a preset difference of the supply and demand unbalance amount of the natural gas node;
the natural gas system operation feasibility correction model is expressed as follows:
Figure FDA0003781280300000051
in the formula, Y is the correction quantity of the operation feasibility of the natural gas system; t is a planning cycle year index; i is a generator set index; p is a natural gas pipeline set index; b is a load partition set index; h is a running time set index in a planning period; CG is a set for representing whether a newly-added generator set exists on the node; CP represents whether a new natural gas pipeline set exists between nodes; f is the natural gas consumption of the gas turbine set; p is the rated power of the generator; f is the natural gas pipeline flow; z is a binary variable representing the newly added state of the generator set, 1 is newly added, and 0 is not newly added;
Figure FDA0003781280300000052
a binary variable for representing the newly added state of the generator set in the last iteration is added, wherein 1 is added, and 0 is not added; x is a binary variable representing the newly added state of the natural gas pipeline, 1 is newly added, and 0 is not newly added;
Figure FDA0003781280300000053
the binary variable representing the newly added state of the natural gas pipeline in the last iteration is 1, and 0 is not newly added;
the natural gas system operation feasibility test correction criterion is expressed as:
W bht +Y bht ≤ε bht
in the formula, t is a planning cycle year index; i is a generator set index; b is a load partition set index; h is the running time set index in the planning cycle; y is the operation feasibility correction quantity of the natural gas system; w is the supply and demand unbalance of the natural gas node; y is the operation feasibility correction quantity of the natural gas system; epsilon is a preset difference of the supply and demand unbalance amount of the natural gas node.
5. The collaborative planning method according to claim 1, wherein: the sub-problem model for checking the operation reliability of the electric-gas interconnection comprehensive energy system of the collaborative planning scheme in the step (4) is expressed as follows:
Min S bht ＝1 T *s 1 +1 T *s 2
S.t.
K*PL lbht +s 1 -s 2 ＝A*P ibht -B*PD bht
Figure FDA0003781280300000054
Figure FDA0003781280300000055
Figure FDA0003781280300000056
Figure FDA0003781280300000057
Figure FDA0003781280300000058
Figure FDA0003781280300000059
θ ref ＝0
in the formula, S is the amount of unbalance of the power supply and demand of the power grid node; t is a planning cycle year index; i is a generator set index; m is a bus head end node set index; n is a bus terminal node set index; l is transmission line set index; b is a load partition set index; h is the running time set index in the planning cycle; CG is a set for representing whether a newly-added generator set exists on the node; CL represents whether a newly added transmission line set exists between nodes; EG represents whether the existing generator set is collected on the characterization node; EL is a characterizationWhether a set of the existing transmission lines exists on the node or not; z is a binary variable representing the newly added state of the generator set, 1 is newly added, and 0 is not newly added; y is a binary variable representing the newly added state of the power transmission line, 1 is newly added, and 0 is not newly added; t is a planning period; s is a relaxation variable vector; k is a bus-branch incidence matrix; a is a bus-generator incidence matrix; b is a bus-load incidence matrix; PL is branch power flow; p is the rated power of the generator; PD is the load demand; p max The maximum output of the generator is obtained; theta is a voltage phase angle; x is the line reactance; m is a large number.
6. The collaborative planning method according to claim 1 or 5, wherein: the operation reliability test criterion of the electric-gas interconnection comprehensive energy system in the step (4) is expressed as follows:
Figure FDA0003781280300000061
Figure FDA0003781280300000062
in the formula, t is a planning cycle year index; b is a load partition set index; h is a running time set index in a planning period; EENS is the system energy deficit; DT is operating time, and the unit is h; s is the amount of supply and demand unbalance of the power grid node;
the operation reliability correction model of the electric-gas interconnection comprehensive energy system is expressed as follows:
Figure FDA0003781280300000063
in the formula, Z is the operation reliability correction quantity of the electric-gas interconnection comprehensive energy system; t is the year index of the planning cycle; i is a generator set index; l is a transmission line set index; b is a load partition set index; h is the running time set index in the planning cycle; CG is used for representing whether there is new hair on the nodeA set of motor sets; CL represents whether a newly added transmission line set exists between nodes; PL is branch power flow; p is the rated power of the generator; z is a binary variable representing the newly added state of the generator set, 1 is newly added, and 0 is not newly added;
Figure FDA0003781280300000064
a binary variable for representing the newly added state of the generator set in the last iteration is added, wherein 1 is added, and 0 is not added; y is a binary variable representing the newly added state of the power transmission line, 1 is added, and 0 is not added;
Figure FDA0003781280300000065
the binary variable representing the newly added state of the power transmission line in the last iteration is 1, and 0 is not newly added;
the operation reliability test correction criterion considering the electricity-gas interconnection comprehensive energy system is expressed as follows:
Figure FDA0003781280300000066
in the formula, t is a planning cycle year index; b is a load partition set index; h is a running time set index in a planning period; EENS is the system energy deficit; and Z is the operation reliability correction quantity of the electric-gas interconnection comprehensive energy system.
7. An electric-gas interconnection comprehensive energy system collaborative planning system is characterized by comprising:
the system comprises a first module, a second module and a third module, wherein the first module is internally provided with a collaborative planning main problem model with the lowest total cost of an electric-gas interconnected comprehensive energy system as a planning target, and obtains a primary planning scheme according to the collaborative planning main problem model;
the second module is internally provided with a sub-problem model for checking the operation feasibility of the power system and a power system operation feasibility correction model;
judging whether the primarily selected planning scheme obtained in the first module meets the requirement of the operation feasibility of the power system or not through a sub-problem model for checking the operation feasibility of the power system of the collaborative planning scheme;
if the requirements are met, the main problem model constructed by the first module is considered to be a collaborative planning model considering the operation feasibility of the power system, and the obtained primary selection planning scheme is an optimized planning scheme meeting the operation feasibility requirements of the power system;
if the requirement is not met, constructing a power system operation feasibility correction model, performing loop iteration, in the loop process, iteratively adding the power system operation feasibility correction model in the power system operation feasibility test criterion to form a power system operation feasibility test correction criterion, adding the power system operation feasibility test correction criterion into the collaborative planning main problem model to serve as a newly added constraint condition until the obtained optimized planning scheme meets the power system operation feasibility requirement, when the loop is terminated, the formed main problem model is the collaborative planning model considering the power system operation feasibility, and the obtained planning scheme is the optimized planning scheme meeting the power system operation feasibility requirement;
a third module, which is internally provided with a sub-problem model for testing the operation feasibility of the natural gas system and a natural gas system operation feasibility correction model;
judging whether the obtained optimized planning scheme meeting the operation feasibility requirement of the power system meets the operation feasibility requirement of the natural gas system or not according to the operation feasibility test criterion of the natural gas system by a sub-problem model for testing the operation feasibility of the natural gas system of the collaborative planning scheme;
if the requirement is met, the collaborative planning model considering the operation feasibility of the power system is considered to be the collaborative planning model considering the operation feasibility of the electricity-gas interconnected comprehensive energy system, and the obtained optimized planning scheme meeting the operation feasibility requirement of the power system is the optimized planning scheme meeting the operation feasibility requirement of the electricity-gas interconnected comprehensive energy system;
if the requirements are not met, iteratively adding a natural gas system operation feasibility correction model in a natural gas system operation feasibility test criterion through a natural gas system operation feasibility correction model and loop iteration, in the loop process, forming a natural gas system operation feasibility test correction criterion, adding the natural gas system operation feasibility test correction criterion into a collaborative planning main problem model to serve as a newly-added constraint condition until the obtained optimization planning scheme meets the electric-gas interconnection comprehensive energy system operation feasibility requirement, when the loop is terminated, forming the main problem model which is the collaborative planning model considering the electric-gas interconnection comprehensive energy system operation feasibility, obtaining the planning scheme which is the optimization planning scheme meeting the electric-gas interconnection comprehensive energy system operation feasibility requirement, and turning to the next step;
the fourth module is internally provided with a sub-problem model for testing the operation reliability of the electric-gas interconnection comprehensive energy system and an electric-gas interconnection comprehensive energy system operation reliability correction model of the collaborative planning scheme;
judging whether the obtained optimized planning scheme meeting the operation feasibility requirement of the electric-gas interconnected comprehensive energy system meets the operation reliability requirement of the electric-gas interconnected comprehensive energy system or not according to a sub-problem model for testing the operation reliability of the electric-gas interconnected comprehensive energy system of the collaborative planning scheme and an operation reliability test criterion of the electric-gas interconnected comprehensive energy system;
if the requirement is met, the collaborative planning model considering the operation feasibility of the electric-gas interconnected comprehensive energy system is considered to be the collaborative planning model considering the operation reliability of the electric-gas interconnected comprehensive energy system, and the obtained optimized planning scheme meeting the operation feasibility requirement of the electric-gas interconnected comprehensive energy system is the optimized planning scheme meeting the operation reliability requirement of the electric-gas interconnected comprehensive energy system;
if the requirement is not met, iteratively adding an electric-gas interconnection comprehensive energy system operation reliability correction model in an electric-gas interconnection comprehensive energy system operation reliability test criterion through an electric-gas interconnection comprehensive energy system operation reliability correction model, circularly iterating, and in the circulating process, forming an electric-gas interconnection comprehensive energy system operation reliability test correction criterion, adding the electric-gas interconnection comprehensive energy system operation reliability test correction criterion into a collaborative planning main problem model to serve as a newly added constraint condition until the obtained optimization planning scheme meets the electric-gas interconnection comprehensive energy system operation reliability requirement, when the circulation is terminated, forming the main problem model which is the collaborative planning model considering the electric-gas interconnection comprehensive energy system operation reliability, and obtaining the planning scheme which is the optimization planning scheme meeting the electric-gas interconnection comprehensive energy system operation reliability requirement;
the collaborative planning main problem model taking the lowest total cost of the electricity-gas interconnection comprehensive energy system as a planning target is expressed as follows:
Min C
Figure FDA0003781280300000081
Figure FDA0003781280300000082
Figure FDA0003781280300000091
Figure FDA0003781280300000092
Figure FDA0003781280300000093
Figure FDA0003781280300000094
Figure FDA0003781280300000095
Figure FDA0003781280300000096
Figure FDA0003781280300000097
in the formula, C is newly increased investment cost of collaborative planning; t is a planning cycle year index; i is a generator set index; l is a transmission line set index; p is a natural gas pipeline set index; b is a load partition set index; h is a running time set index in a planning period; CG is a set for representing whether a newly-added generator set exists on the node; CL represents whether a newly added transmission line set exists between nodes; CP is the representation node whether there is a new natural gas pipeline set; EG represents whether a set of existing generator sets exists on a representation node or not; d is the discount rate; GIC is the generator set investment cost; FIC is the investment cost of the transmission line; PIC is the investment cost of the natural gas pipeline; z is a binary variable representing the newly added state of the generator set, 1 is added, and 0 is not added; y is a binary variable representing the newly added state of the power transmission line, 1 is added, and 0 is not added; x is a binary variable representing the newly added state of the natural gas pipeline, 1 is newly added, and 0 is not newly added; DT is the running time; OC is the operating cost; p is the rated power of the generator; p max The maximum output of the generator is obtained; SV is the residual value; gamma is a coefficient of residual value; t is a planning period; t is a unit of com Installing and debugging time for new equipment; PD is the load demand; r is the system rotation standby requirement.
8. An electronic device, comprising:
one or more processors; and storage means for storing one or more programs which, when executed by the one or more processors, cause the one or more processors to implement the co-planning method according to any one of claims 1 to 6.
9. A computer-readable medium, on which a computer program is stored which, when being executed by a processor, carries out the co-planning method according to any one of claims 1 to 6.
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