技术领域technical field
本发明属于电力设计及用电交易自动匹配技术领域，具体说是一种可实现跨区域间发电控制与用电交易的省际间联络线用电交易统筹联网匹配方法。The invention belongs to the technical field of electric power design and automatic matching of electricity transactions, and specifically relates to an overall planning and networking matching method for inter-provincial tie-line electricity transactions that can realize cross-regional power generation control and electricity transactions.
背景技术Background technique
近年来，我国的电力市场供需形势发生了很大的变化，每年投产的大中型机组容量都在10GW以上，而工业用电增长幅度却不能同步增长，火电利用小时下降，机组停机备用容量明显增加。与此同时，负荷率下降、峰谷差拉大、新能源并网不断增加，给电网的调峰和新能源消纳带来了很大的难度。In recent years, the supply and demand situation of my country's electricity market has undergone great changes. The capacity of large and medium-sized generating units put into operation each year is above 10GW, but the growth rate of industrial electricity consumption cannot be increased simultaneously. The utilization hours of thermal power have decreased, and the standby capacity of generating units has increased significantly. . At the same time, the decline in load rate, the widening of the peak-to-valley difference, and the increasing integration of new energy into the grid have brought great difficulties to the peak regulation of the power grid and the consumption of new energy.
针对当前区域电网联系较弱的情况，联络线的调整控制变得非常重要。优质的联络线计划是现有调度方式下实现大范围内资源优化配置和全网统一协调计划的关键业务。联络线计划根据各个省的负荷预测、开机情况制定。根据当前的负荷，调节出力使得省际间联络线交易的值与联络线计划一致，但有的时候因为负荷预测不准、出力突然发生变化，如省内机组跳闸、没有预测到足够大的风电或者光伏等新能源出力的时候，实际曲线不能满足联络线计划曲线，就需要修改联络线计划，而修改联络线计划的方式是通过交易。In view of the weak connection of the current regional power grid, the adjustment and control of the tie line becomes very important. High-quality connection line planning is the key business to realize the optimal allocation of resources in a wide range and the unified coordination planning of the whole network under the existing dispatching method. The connection line plan is formulated according to the load forecast and start-up situation of each province. According to the current load, the output is adjusted so that the value of inter-provincial tie-line transactions is consistent with the tie-line plan, but sometimes due to inaccurate load forecasting, sudden changes in output, such as tripping of domestic units, not predicting a large enough wind power Or when new energy sources such as photovoltaics contribute, the actual curve cannot meet the planned curve of the tie line, and the tie line plan needs to be modified, and the way to modify the tie line plan is through transactions.
省际间区域间联络线交易会出现以下几种情况：Inter-provincial and inter-regional contact line transactions will occur in the following situations:
出力<负荷，即本省所有机组的出力加到最大时依然不能满足负荷，这时需要通过外省给本省供电；Output < load, that is, when the output of all units in the province is added to the maximum, it still cannot meet the load. At this time, it is necessary to supply power to the province through other provinces;
出力>负荷，即本省所有机组的出力减到最小时，出力还大于负荷，这时就需要通过联络线把多余的电卖到外省。Output > load, that is, when the output of all units in the province is reduced to the minimum, the output is still greater than the load. At this time, it is necessary to sell the excess electricity to other provinces through the tie line.
从上述可以看出，当出力和负荷不满足要求时，就需要从外省去购电或把本省的电卖给外省。现在我国电力电网已进入跨大区、跨省(区)联网时代。随着国民经济及电力系统的迅速发展，全国联网成为必然的趋势，对于电力资源的合理利用、能源合理分配有重要的意义。It can be seen from the above that when the output and load do not meet the requirements, it is necessary to purchase electricity from other provinces or sell electricity from the province to other provinces. Now my country's power grid has entered the era of inter-regional and inter-provincial (district) networking. With the rapid development of the national economy and power system, national networking has become an inevitable trend, which is of great significance to the rational use of power resources and the rational distribution of energy.
发明内容Contents of the invention
本发明的目的在优化技术的不足，在一定程度上解决目前省际间电力用力与负荷的匹配关系，提出一种可实现跨区域间发电控制与用电交易的省际间联络线用电交易统筹联网匹配方法，具有提升省迹间电网协调联动能力、增强电力能源利用率，并具有资源优化利用的技术效果。The purpose of the present invention is to solve the shortage of optimization technology, to a certain extent, solve the matching relationship between inter-provincial power consumption and load, and propose an inter-provincial tie-line electricity transaction that can realize cross-regional power generation control and electricity transaction The method of coordinating network matching has the technical effect of improving the coordination and linkage ability of power grids between provinces, enhancing the utilization rate of electric energy, and optimizing the utilization of resources.
本发明方案提出一种区域间联络线用电交易统筹联网匹配控制方法，包括以下步骤：The solution of the present invention proposes a control method for overall planning and networking matching of inter-regional tie line electricity transactions, which includes the following steps:
(1-1)确定各省份需要购入或售出电力电量值，并确定跨省交易总量约束值及联络线交易量约束值；(1-1) Determine the amount of electricity that needs to be purchased or sold in each province, and determine the constraint value of the total amount of inter-provincial transactions and the constraint value of the transaction volume of contact lines;
(1-2)确定安全约束值与交易量最小值，建立优化模型目标函数，所述优化模型目标函数建立条件包括跨省交易总量约束值、参与购电交易机组的交易量约束值以及参与售电交易机组的交易量约束值；(1-2) Determine the security constraint value and the minimum transaction volume, and establish an optimization model objective function. The conditions for establishing the optimization model objective function include the total inter-provincial transaction constraint value, the transaction volume constraint value of the units participating in the power purchase transaction, and the participating The trading volume constraint value of the electricity sales trading unit;
(1-3)对优化模型目标函数求解，获得最佳联络交易总量值；(1-3) Solving the objective function of the optimization model to obtain the best contact transaction total value;
(1-4)对(1-3)中求解得到的最佳联络交易总量值取整，并随机选取一个交易总量值减去不满足∑xi＝0的数值，其中xi表示第i个省的交易量值，i为正整数；(1-4) Round up the total value of the optimal contact transaction obtained in (1-3), and randomly select a total transaction value minus the value that does not satisfy ∑xi =0, where xi represents the first The transaction volume value of i provinces, where i is a positive integer;
(1-5)求解各省份的交易匹配量值，将各省份需要购入的交易量值作为元素形成集合A，需要售出的交易量值作为元素形成集合B，并对集合A与集合B内元素做降序排列，获取需要购入的交易量最大的省份及需要售出的交易量值最大的省份进行交易，如果两个省份的需要购入的交易量与需要售出的交易量相等，则优选这两个省份进行交易。(1-5) Solve the transaction matching value of each province, use the transaction value that needs to be purchased in each province as an element to form a set A, and the transaction value that needs to be sold as an element to form a set B, and set A and set B The inner elements are sorted in descending order, and the province with the largest transaction volume to be purchased and the province with the largest transaction volume to be sold are obtained for trading. If the transaction volume to be purchased in the two provinces is equal to the transaction volume to be sold, Then these two provinces are preferred for trade.
2、如权利要求1所述的省际间联络线用电交易统筹联网匹配方法，其特征在于：所述步骤(1-5)还包括：交易后，若需要购入的交易量与需要售出的交易量不相等，则将需要购入的交易量与需要售出的交易量做绝对差值，将差值作为元素与其它需要购电或售电的省份参与排序并重复步骤(1-5)。2. The inter-provincial contact line electricity transaction overall planning and networking matching method according to claim 1, characterized in that: said step (1-5) further includes: after the transaction, if the transaction volume to be purchased is equal to the transaction volume to be sold If the transaction volumes are not equal, make the absolute difference between the transaction volume to be purchased and the transaction volume to be sold, and use the difference as an element to participate in the sorting with other provinces that need to purchase or sell electricity and repeat the steps (1- 5).
3、如权利要求1所述的省际间联络线用电交易统筹联网匹配方法，其特征在于：所述(1-4)中最佳联络交易总量取整方法采用四舍五入取整法和残差随机分配法。3. The inter-provincial contact line electricity transaction overall planning and networking matching method according to claim 1, characterized in that: the rounding method of the optimal contact transaction total amount in (1-4) adopts the rounding method and residual Differential random allocation method.
4、如权利要求1所述的省际间联络线用电交易统筹联网匹配方法，其特征在于：所述跨省交易总量约束值满足∑xi＝0：4. The inter-provincial contact line electricity transaction overall planning and networking matching method according to claim 1, characterized in that: the constraint value of the total amount of inter-provincial transactions satisfies ∑xi =0:
其中，xi表示第i个省的交易量，i为正整数。Among them, xi represents the transaction volume of the i-th province, and i is a positive integer.
所述参与购电交易的机组交易电力约束值满足si-xi-b≥0：The trading power constraint value of the units participating in the power purchase transaction satisfies si -xi-b≥0 :
其中，si表示参与交易的第i个省的上备用容量，xi表示第i个省的交易量，i为正整数，b表示上备用减去交易量的松弛度。Among them,si represents the online reserve capacity of the i-th province participating in the transaction,xi represents the transaction volume of the i-th province, i is a positive integer, and b represents the slack degree of the online reserve minus the transaction volume.
5、如权利要求1所述的省际间联络线用电交易统筹联网匹配方法，其特征在于：所述参与售电交易的机组交易电力约束值满足：pi-xi-b≤05. The inter-provincial tie-line electricity transaction overall planning and networking matching method according to claim 1, characterized in that: the trading power constraint value of the units participating in the electricity sales transaction satisfies: pi -xi-b≤0
其中，pi表示参与交易的第i个省的下备用容量，xi表示第i个省的交易量，i为正整数，b表示下备用减去交易量的松弛度。Among them, pi represents the lower reserve capacity of the i-th province participating in the transaction,xi represents the transaction volume of the i-th province, i is a positive integer, andb represents the slack degree of the lower reserve minus the transaction volume.
6、如权利要求1所述的省际间联络线用电交易统筹联网匹配方法，其特征在于：所述优化模型目标函数为：6. The inter-provincial tie-line electricity transaction overall planning and networking matching method according to claim 1, characterized in that: the objective function of the optimization model is:
其中，表示第i个省上备用与下备用容量的均值，si表示参与交易的第i个省的上备用容量，pi表示参与交易的第i个省的下备用容量；xi表示第i个省的交易量，i为正整数，θ∈[0,1]为设定的参数，θ越接近1则优化尽可能保证各省电网运行安全边界越大，θ越接近0则尽可能保证交易量小但满足最低交易需求；主要用于尽可能保证自身电力电量就比较平衡的省份交易量最小。in, Indicates the average value of the upper reserve capacity and the lower reserve capacity of the i-th province, si indicates the upper reserve capacity of the i-th province participating in the transaction, pi indicates the lower reserve capacity of the i-th province participating in the transaction; xi indicates the i-th province The transaction volume of the province, i is a positive integer, θ∈[0,1] is the set parameter, the closer θ is to 1, the optimization will ensure that the power grid operation safety boundary of each province is larger, and the closer θ is to 0, the transaction volume will be guaranteed as much as possible Small but meets minimum transaction requirements; It is mainly used to ensure that the provinces with relatively balanced power consumption have the smallest trading volume.
本方案的有益效果体现在：The beneficial effects of this program are reflected in:
1、本发明通过考虑安全约束，机组出力值，各省份负荷及联络线交易计划，并在此基础上建立基于全网统筹的省际间联络线交易自动匹配数学模型，考虑安全约束的同时保证各省交易量总和较小，最后结合电力交易的实际情况，对求解出的交易量取整，并通过最大匹配算法找出各省份的交易对象。具有提升电网协调联动能力、增强电力能源利用率，并具有资源优化利用的技术效果。1. The present invention considers safety constraints, unit output values, loads of each province and tie-line transaction plans, and on this basis establishes an automatic matching mathematical model for inter-provincial tie-line transactions based on overall network planning, and ensures safety while considering safety constraints. The sum of the transaction volumes in each province is relatively small, and finally combined with the actual situation of power transactions, the calculated transaction volumes are rounded up, and the transaction objects of each province are found through the maximum matching algorithm. It has the technical effect of improving the coordination and linkage ability of the power grid, enhancing the utilization rate of electric energy, and optimizing the utilization of resources.
2、优化的模型目标函数在考虑安全约束的同时保证各省份交易总量最小，约束条件包括各省份交易总量约束和参与购电交易的机组交易电量约束以及参与售电交易的机组交易电量约束。数学模型的建立与使用可以帮助需要涉及考虑跨省联络线交易及安全约束的电力公司进行运营计划的制定，提高决策的科学性和有效性，有助于提升交易业务的智能化运营水平。2. The optimized model objective function ensures the minimum transaction volume of each province while considering the security constraints. The constraints include the transaction volume constraints of each province, the transaction volume constraints of the units participating in the power purchase transaction, and the transaction volume constraints of the units participating in the electricity sales transaction. . The establishment and use of mathematical models can help power companies that need to consider cross-provincial contact line transactions and security constraints to formulate operational plans, improve the scientificity and effectiveness of decision-making, and help improve the intelligent operation level of transaction business.
附图说明Description of drawings
图1为本发明各省份需购入电力、需售出电力值分布；Fig. 1 is that each province of the present invention needs to purchase electric power, needs to sell electric power value distribution;
图2为本发明同一省份不同时间点需要购入、售出交易电力值分布；Fig. 2 is the distribution of electricity values that need to be purchased and sold at different time points in the same province in the present invention;
图3为本发明区域间联络线用电交易统筹联网匹配控制方法主流程图；Fig. 3 is the main flow chart of the control method for overall planning and networking matching of inter-regional tie line electricity transaction in the present invention;
图4为本发明优化模型目标函数求解子流程图。Fig. 4 is a sub-flow chart for solving the objective function of the optimization model of the present invention.
具体实施方式detailed description
为了使本发明的目的、技术方案及优点更加清楚明白，以下结合附图及具体实施方式，对本发明进行进一步详细说明。应当理解，此处所描述的具体实施方式仅用以解释本发明，并不用于限定本发明。In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, and are not intended to limit the present invention.
如图1图2及图3所示，本发明方案提出一种区域间联络线用电交易统筹联网匹配控制方法，包括以下步骤：As shown in Fig. 1, Fig. 2 and Fig. 3, the scheme of the present invention proposes a control method for overall planning and networking matching of inter-regional tie line electricity transactions, including the following steps:
S1确定各省份需要购入量值、各省售出交易量值用电负荷，并确定跨省交易总量约束值及联络交易线；通过各个省份的负荷预测以及各省的发电机组开机情况得出联络线计划，而修改联络线计划的方式则是通过交易。S1 Determine the value of electricity consumption that needs to be purchased in each province, the value of the transaction value sold in each province, and determine the constraint value of the total amount of cross-provincial transactions and the contact transaction line; the contact is obtained through the load forecast of each province and the start-up status of the generator sets in each province Line plan, and the way to modify the contact line plan is through transactions.
如图1及图2所示，图中每一个‘I’型线表示各省份购电及售电能力，其中si表示参与交易的第i个省的上备用容量,pi表示参与交易的第i个省的下备用容量,mi表示第i个省的上备用与下备用的中点。As shown in Figure 1 and Figure 2, each 'I'-shaped line in the figure represents the power purchase and sale capacity of each province, where si represents the upper reserve capacity of the i-th province participating in the transaction, and pi represents the capacity of the i-th province participating in the transaction The lower reserve capacity of the i-th province, mi represents the midpoint of the upper reserve and the lower reserve of the i-th province.
再如图3及图4所示，S2确定安全约束值与交易量最小值，建立优化模型目标函数，所述优化模型目标函数建立条件包括跨省交易总量约束值、参与购电交易机组的交易量约束值以及参与售电交易机组的交易量约束值；As shown in Figures 3 and 4, S2 determines the security constraint value and the minimum value of the transaction volume, and establishes an optimization model objective function. The transaction volume constraint value and the transaction volume constraint value of the units participating in the electricity sales transaction;
S3对优化模型目标函数求解，获得最佳联络交易总量值；S3 solves the objective function of the optimization model to obtain the optimal total contact transaction value;
S4对S3中求解得到的最佳联络交易总量值取整，并随机选取一个交易总量值减去不满足∑xi＝0的数值，其中xi表示第i个省的交易量值，i为正整数；考虑到电力交易实际情况，对求解得到的各省份交易量进一步优化，在保证各省份总交易量等于零，即∑xi＝0的情况下对各省份交易量通过四舍五入进行取整。为保证∑xi＝0，随机选取一个交易数量减掉不满足∑xi＝0的量，因模型本身留有裕度，所以稍微接受一点偏差不影响最终的结果。S4 rounds the total value of the optimal contact transaction obtained from the solution in S3, and randomly selects a total transaction value minus the value that does not satisfy ∑xi =0, where xi represents the transaction value of the i-th province, i is a positive integer; considering the actual situation of electricity trading, the transaction volume of each province obtained from the solution is further optimized, and the transaction volume of each province is rounded to obtain the value when the total transaction volume of each province is guaranteed to be equal to zero, that is, ∑xi = 0 all. In order to ensure that∑xi = 0, randomly select a transaction quantity and subtract the amount that does not satisfy∑xi = 0. Because the model itself has a margin, a slight deviation will not affect the final result.
S5求解各省份的交易量值，将各省份用需要购入的交易量值作为元素形成集合A，需要售出的交易量值作为元素形成集合B，并对集合A与集合B内元素做降序排列，获取需要购入的交易量最大的省份及需要售出的交易量值最大的省份进行交易，如果两个省份的需要购入的交易量与需要售出的交易量相等，则优选这两个省份进行交易。S5 solves the transaction volume value of each province, uses the transaction volume value that needs to be purchased as an element to form set A in each province, and the transaction volume value that needs to be sold is used as an element to form set B, and descends the elements in set A and set B Arrange, obtain the province with the largest transaction volume that needs to be purchased and the province with the largest transaction volume that needs to be sold for transactions. If the transaction volume that needs to be purchased in the two provinces is equal to the transaction volume that needs to be sold, then the two provinces are preferred. provinces to trade.
所述步骤S5还包括：交易后，若需要购入的交易量与需要售出的交易量不相等，则将需要购入的交易量与需要售出的交易量做绝对差值，将差值作为元素与其它需要购电或售电的省份参与排序并重复步骤S5。The step S5 also includes: after the transaction, if the transaction volume to be purchased is not equal to the transaction volume to be sold, then an absolute difference is made between the transaction volume to be purchased and the transaction volume to be sold, and the difference Participate in sorting with other provinces that need to purchase or sell electricity as elements and repeat step S5.
结果的获取是在建立考虑安全约束的同时保证各省份交易总量最小的模型上，采用Python语言编写优化程序，实现模型的求解计算，最终得到结果。The acquisition of the results is based on the establishment of a model that considers the security constraints while ensuring the minimum transaction volume in each province, and uses the Python language to write an optimization program to realize the solution calculation of the model and finally obtain the result.
所述跨省交易总量约束值满足∑xi＝0，其中，xi表示第i个省的交易电力，i为正整数。The constraint value of the total amount of inter-provincial transactions satisfies ∑xi =0, where xi represents the transaction power of the i-th province, and i is a positive integer.
所述参与购电交易的机组交易电量约束值满足：si-xi-b≥0，其中，si表示参与交易的第i个省的上备用，xi表示第i个省的交易量，i为正整数，b表示上备用减去交易量的松弛度。The transaction power constraint value of the units participating in the power purchase transaction satisfies: si -xi -b≥0, where si represents the upper reserve of thei-th province participating in the transaction, and x irepresents the transaction volume of the i-th province , i is a positive integer, and b represents the slack of the upper reserve minus the trading volume.
所述参与售电交易的机组交易电量约束值满足：pi-xi-b≤0，其中，pi表示参与交易的第i个省的下备用，xi表示第i个省的交易量，i为正整数，b表示下备用减去交易量的松弛度。The transaction power constraint value of the unit participating in the electricity sales transaction satisfies: pi -xi -b≤0, where pi represents the lower reserve of thei-th province participating in the transaction, and x irepresents the transaction volume of the i-th province , i is a positive integer, and b represents the slack of the lower reserve minus the trading volume.
所述优化模型目标函数为：其中，表示第个省上备用与下备用的中点，si表示参与交易的第i个省的上备用，pi表示参与交易的第i个省的下备用；xi表示第i个省的交易量，i为正整数，θ∈[0,1]是人为给定的参数，主要用于调节安全约束与交易量之间的平衡；主要用于尽可能保证自身电力电量就比较平衡的省份交易量最小，让中点已经很接近于x轴的省份尽可能不做交易。The objective function of the optimization model is: in, Indicates the midpoint between the upper reserve and the lower reserve of the province, si represents the upper reserve of the i-th province participating in the transaction, pi represents the lower reserve of the i-th province participating in the transaction; xi represents the transaction of the i-th province amount, i is a positive integer, θ∈[0,1] is an artificially given parameter, which is mainly used to adjust the balance between security constraints and transaction volume; It is mainly used to ensure that the provinces with relatively balanced power and electricity have the smallest transaction volume, so that the provinces whose midpoint is already very close to the x-axis do not conduct transactions as much as possible.
约束条件：Restrictions:
各省份交易总量约束式中∑xi＝0，xi表示第i个省的交易量，i＝1，…，n。In the constraint formula of the total volume of transactions in each province, ∑xi = 0, xi represents the transaction volume of thei -th province, i = 1,..., n.
参与购电交易的机组交易电量约束∑si-nb≥0其中，si表示参与交易的第i个省的上备用，i＝1，…，n表示参与交易的第i个省，b表示上备用减去交易量的松弛度。Constraints on the transaction power of units participating in the power purchase transaction ∑si -nb≥0 where si represents the upper reserve of the i-th province participating in the transaction, i=1,...,n represents the i-th province participating in the transaction, and b represents The slack on the reserve minus the volume.
参与售电交易的机组交易电量约束∑pi-nb≤0，其中pi表示参与交易的第i个省的下备用，i＝1，…，n表示参与交易的第i个省，b表示下备用减去交易量的松弛度。Constraints on the trading power of units participating in electricity sales transactions ∑pi -nb≤0, where pi represents the lower reserve of the i-th province participating in the transaction, i=1,..., n represents the i-th province participating in the transaction, and b represents The lower reserve minus the slack of the volume.
结果的获取是在建立考虑安全约束的同时保证各省份交易总量最小的模型上，采用Python语言编写优化程序，实现模型的求解计算，最终得到结果。The acquisition of the results is based on the establishment of a model that considers the security constraints while ensuring the minimum transaction volume in each province, and uses the Python language to write an optimization program to realize the solution calculation of the model and finally obtain the result.
考虑跨省联络线交易与安全约束的机组组合模型是电力系统调度模型的改进。电力系统调度模型比较复杂，尤其是动态调度模型，在数学上呈现高维数、离散性、非线性的特点。学界研究的求解方法有启发式方法，动态规划方法，拉格朗日乘子法，分支定界法，遗传算法、粒子群算法、蚁群算法等人工智能类算法。目前随着规划软件的成熟，基于Python实现优化模型的求解，不但可以减少工程技术人员开发程序的时间，将更多的时间投入到模型的建立和方案的设计中，还可以提高模型求解准确性和鲁棒性。The unit combination model considering inter-provincial tie-line transactions and security constraints is an improvement of the power system dispatching model. The power system dispatching model is relatively complex, especially the dynamic dispatching model, which presents the characteristics of high dimensionality, discreteness and nonlinearity in mathematics. The solving methods studied in the academic circle include heuristic method, dynamic programming method, Lagrangian multiplier method, branch and bound method, genetic algorithm, particle swarm algorithm, ant colony algorithm and other artificial intelligence algorithms. At present, with the maturity of planning software, solving the optimization model based on Python can not only reduce the time for engineers and technicians to develop programs, but also devote more time to model establishment and scheme design, and can also improve the accuracy of model solving and robustness.
本发明模型求解采用朗格朗日乘子法，引入拉格朗日函数，则L表达式为：L(x,λ,ν)＝f(x)+λ∑xi+μ∑(si-xi-b)+ν∑(pi-xi-b)此时求解上述优化问题，必须满足下述条件(也是我们的求解条件)：The model solution of the present invention adopts Langrange multiplier method, introduces Lagrangian function, then L expression is: L(x, λ, ν)=f(x)+λ∑xi+μ∑( si -xi -b)+ν∑(pi -xi -b) At this time, to solve the above optimization problem, the following conditions must be met (also our solution conditions):
λ≥0λ≥0
μ≥0μ≥0
ν≥0ν≥0
λ∑x*＝0λ∑x* ＝0
μ(si-x*-b)＝0,i＝1,2,….nμ(si -x* -b)＝0,i＝1,2,….n
ν(pi-x*-b)＝0,i＝1,2,….nν(pi -x* -b)=0,i=1,2,….n
该数学模型将考虑联络线计划和跨省交易量统一作为决策变量，统筹优化。优化的目标函数在考虑安全约束的同时保证各省份交易总量最小，约束条件包括各省份交易总量约束和参与购电交易的机组交易电量约束以及参与售电交易的机组交易电量约束。数学模型的建立与使用可以帮助需要涉及考虑跨省联络线交易及安全约束的电力公司进行运营计划的制定，提高决策的科学性和有效性，有助于提升交易业务的智能化运营水平。The mathematical model considers the contact line plan and the inter-provincial transaction volume as decision variables for overall optimization. The optimized objective function ensures the minimum transaction volume in each province while considering the security constraints. The constraints include the transaction volume constraints in each province, the transaction volume constraints of the units participating in the power purchase transaction, and the transaction volume constraints of the units participating in the electricity sales transaction. The establishment and use of mathematical models can help power companies that need to consider cross-provincial contact line transactions and security constraints to formulate operational plans, improve the scientificity and effectiveness of decision-making, and help improve the intelligent operation level of transaction business.
应当理解，虽然本说明书按照实施方式加以描述，但并非每个实施方式仅包含一个独立的技术方案，说明书的这种叙述方式仅仅是为清楚起见，本领域技术人员应当将说明书作为一个整体，各实施例中的技术方案也可以经适当组合，形成本领域技术人员可以理解的其他实施方式。It should be understood that although this description is described according to implementation modes, not each implementation mode only contains an independent technical solution, and this description in the description is only for clarity, and those skilled in the art should take the description as a whole, and each The technical solutions in the embodiments can also be properly combined to form other implementations that can be understood by those skilled in the art.
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