CN112241803A - An inter-provincial and intra-provincial power balance coordination optimization method and system - Google Patents

Abstract

An inter-provincial and intra-provincial power balance coordination optimization method and system, comprising: obtaining quotations of inter-provincial trading members and quotations of generator sets and electricity purchasing users in the province; The model calculates the first clear electricity quantity and the first electricity price of each market member in the province; according to the first clear electricity quantity and the first electricity price and the quotations of the generator sets and electricity purchasers in the province, the pre-established intra-provincial sub-optimization model is used to calculate the province. The second amount of electricity cleared and the second electricity price of each market member in The quotation strategy of the members of the internal market is recalculated until the error is less than the preset deviation value, so as to realize the power balance between the provinces and the provinces. Real-time balance of electricity consumption in the province.

Description

An inter-provincial and intra-provincial power balance coordination optimization method and system

technical field

The invention relates to the field of electric power automation, in particular to an inter-provincial and intra-provincial electric power balance coordination optimization method and system.

Background technique

At present, the pace of power market construction is accelerating. With the gradual maturity of UHV power transmission technology, long-distance inter-provincial power transmission has become an important way to optimize power resources across regions. The regularization and modelization of inter-provincial power transactions have greatly increased the transaction volume. However, the inter-provincial electricity market still has problems such as difficulty in advancing and serious barriers to inter-provincial transactions. In the operation of the power system, there is usually uneven distribution of energy. Renewable energy bases such as coal resources, hydropower resources, wind power or photovoltaic power generation are distributed in different geographical locations and are too scattered. The power demand of the power load center continues to grow. In addition, it is far from the geographical location of various power resources, and the scale and distance of energy flow will further increase, resulting in the reverse distribution of energy demand and resource supply. This puts forward requirements for the ability to optimize the allocation of power resources in a wider range, and requires comprehensive consideration of the quotation methods of inter-provincial and intra-provincial market members to achieve electricity balance between provinces and provinces. At present, the inter-provincial and intra-provincial power markets have not yet been connected, and they are still in the stage of hierarchical organization of transactions. It is impossible to achieve flexible distribution of power resources between provinces and intra-provincial markets, and is in a state of balanced power consumption, resulting in a waste of power resources.

SUMMARY OF THE INVENTION

In order to solve the problem of waste of power resources caused by unconnected power markets between provinces and provinces in the prior art, the present invention provides an inter-provincial and intra-provincial power balance coordination optimization method and system.

The technical scheme provided by the present invention is:

An inter-provincial and intra-provincial power balance coordination and optimization method, the improvement of which includes:

Obtain the quotations of inter-provincial transaction members and the quotations of generator sets and electricity purchasers in the province;

Based on the quotations of the inter-provincial trading members, the pre-established inter-provincial main optimization model is used to calculate the first clear electricity quantity and the first electricity price of each inter-provincial market member;

According to the first clear electricity quantity and the first electricity price as well as the quotations of generator sets and electricity purchasers in the province, the pre-established intra-provincial sub-optimization model is used to calculate the second clear electricity quantity and the second electricity price of each market member in the province; If the error between the first and second clearing electricity and the first electricity price and the second electricity price is greater than the preset deviation value, adjust the quotation strategy of the market members in the province, and recalculate the first clearing electricity and the second electricity price. The first electricity price, the second electricity price to be cleared, and the second electricity price, until the errors between the first electricity volume and the second electricity volume and the first electricity price and the second electricity price are less than the preset deviation value, so as to realize the inter-provincial saving. Internal power balance;

The inter-provincial market members include: generator sets and electricity purchasers participating in inter-provincial transactions;

The intra-provincial market members include: generator sets located in the province, electricity purchasers, and foreign generator sets located in other provinces that participate in intra-provincial transactions.

Preferably, the pre-established inter-provincial main optimization model includes:

a first objective function and a plurality of first constraints;

The first constraints include: inter-provincial power generation and purchase balance constraints and inter-provincial available transmission capacity constraints.

Preferably, the inter-provincial power generation and purchase balance constraint is as follows:

线路损耗；In the formula,

line loss;

The inter-provincial available transport capacity constraints are as follows:

in:

T _lt ≤ ATC _lt

发电商i的发电量，

购电商j的购电量；T_lt：线路l在t时段的潮流；

发电商i对线路l在t时段潮流灵敏度分布因子；

购电商j对线路l在t时段潮流灵敏度分布因子；ATC_lt：线路l的可用输送能力。In the formula,

The power generation of generator i,

Electricity purchase of electricity purchaser j; T _lt : the power flow of line l in period t;

Distribution factor of power flow sensitivity of generator i to line l at time t;

The distribution factor of power flow sensitivity of electricity purchaser j to line l at time t; ATC _lt : the available transmission capacity of line l.

Preferably, the first objective function is shown in the following formula:

Max S ^tot =U ^con -C ^pla

In the formula, S ^tot : the target value of social benefit maximization; U ^con : the total quotation on the purchase side; C ^pla : the total quotation on the power generation side;

Wherein, the total quotation U ^con of the power purchase side is calculated as follows:

t时段购电方d的交易合约b的价格；

t时刻购电方d的交易合约b的电量；In the formula, d: electricity purchaser; D: electricity buyer set; b: transaction contract number; B: transaction contract set; t: quotation period; T: period set;

The price of the transaction contract b of the power purchaser d in the period t;

The electricity quantity of the transaction contract b of the power purchaser d at time t;

The total price C ^pla of the power generation side is calculated as follows:

t时段发电厂pla的价格；

t时段发电厂pla的电量。In the formula, pla: power plant; PLA: power plant set;

The price of the power plant pla at time t;

The amount of electricity in the power plant pla at time t.

Preferably, the pre-established intra-provincial sub-optimization model is used to calculate the second cleared electricity and the first electricity price of each market member in the province according to the first cleared electricity quantity and the first electricity price, as well as the quotations of the generator sets and electricity purchasers in the province. The second electricity price includes:

Calculate the power generation cost of the foreign generator sets located in other provinces that participate in the intra-provincial transaction based on the first cleared amount of electricity and the first electricity price;

Based on the power generation cost and the quotations of generator sets and electricity purchasers in the province, the pre-established intra-provincial sub-optimization model is used to calculate the second electricity volume and the second electricity price of each market member in the province.

Preferably, the pre-established intra-provincial sub-optimization model includes:

a second objective function and a plurality of second constraints;

The second constraints include: power supply and demand balance constraints in the control area, generator set operation constraints, network security constraints in the control area, and spinning reserve constraints.

Preferably, the power supply and demand balance constraints in the control area are as follows:

t时段发电机组s的发电出力，

表示t时段用户h净负荷，

省内系统t时段的总网损。in,

The power generation output of generator set s in period t,

represents the net load of user h in period t,

The total network loss of the system in the province during period t.

The operating constraints of the generator set are as follows:

发电机组s输出功率的上限；

发电机组s输出功率的下限；in,

The upper limit of the output power of the generator set s;

The lower limit of the output power of the generator set s;

The network security constraints in the control area are as follows:

t时段联络线断面u-v的正向潮流功率限制；

联络线断面u-v的反向潮流功率限制；

t时段联络线断面u-v的正向潮流功率值；

t时段联络线断面u-v的反向潮流功率值；in,

The forward power flow limit of the tie line section uv in the t period;

Reverse flow power limit of tie line section uv;

The forward power flow power value of the tie line section uv in the t period;

The reverse power flow power value of the tie line section uv in the t period;

The spinning reserve constraint is as follows:

为机组s在t时提供的上调旋转备用；

为系统t时的上调旋转备用需求；

为机组s在t时提供的下调旋转备用；

为系统t时的下调旋转备用需求。in,

Up-spinning reserve provided for unit s at time t;

is the upward spinning reserve requirement for system t;

It is the down-rotating reserve provided for the unit s at time t;

is the down-spinning reserve requirement at system t.

Preferably, the second objective function is as follows:

机组s在t时段的运行成本；K；市场交易期间的时段数；s：系统机组；S：系统机组数。In the formula, F: power generation cost;

Operating cost of unit s in period t; K; number of periods during market transaction; s: system unit; S: system unit number.

Preferably, the adjustment of the quotation strategy of market members in the province includes:

Based on the cost of power generation, the first electricity price of foreign wind turbines in other provinces that participate in intra-provincial transactions will be lowered.

Based on the same inventive concept, the present invention also provides an inter-provincial and intra-provincial power balance coordination and optimization system, including an acquisition module, a calculation module and an adjustment module;

Obtaining module: used to obtain the electricity price of inter-provincial and intra-provincial trading members;

The first calculation module: based on the quotations of the inter-provincial trading members, using a pre-established inter-provincial main optimization model to calculate the first electricity volume and the first electricity price of each market member between the provinces;

The second calculation module is used to calculate the second clear electricity of each market member in the province by adopting the pre-established intra-provincial sub-optimization model according to the first cleared electricity quantity and the first electricity price, as well as the quotations of the generator sets and electricity purchasers in the province. and the second electricity price; if the error between the first and second clearing electricity and the first electricity price and the second electricity price is greater than the preset deviation value, adjust the quotation strategy of the market members in the province, and recalculate all the The first clear electricity quantity and the first electricity price, the second clear electricity quantity and the second electricity price, until the error between the first clear electricity quantity and the second clear electricity quantity and the first electricity price and the second electricity price is less than the preset value Deviation value to achieve power balance between provinces;

The inter-provincial market members include: generator sets and electricity purchasers participating in inter-provincial transactions;

The market members in the province include: generator sets and electricity purchasers located in the province, and foreign generator sets located in other provinces that participate in intra-provincial transactions.

Compared with the prior art, the beneficial effects of the present invention are:

The technical scheme provided by the present invention can coordinate and optimize the power resources in the inter-provincial and intra-provincial markets by establishing an inter-provincial main optimization model and an intra-provincial sub-optimization model and coupling the inter-provincial and intra-provincial markets, so as to realize inter-provincial and intra-provincial use. Electric real-time balance;

The technical solution provided by the present invention is easy to understand, has strong feasibility and wide application range.

Description of drawings

1 is a schematic diagram of an inter-provincial and intra-provincial power balance coordination optimization method of the present invention;

2 is a schematic diagram of an inter-provincial and intra-provincial power balance coordination optimization system of the present invention;

Fig. 3 is the double-layer optimization clearing model framework of the present invention;

FIG. 4 is a flow chart of the power market coupling double-layer optimization clearing according to the present invention.

Detailed ways

In order to better understand the present invention, the content of the present invention will be further described below with reference to the accompanying drawings and examples.

Example 1:

An inter-provincial and intra-provincial power balance coordination optimization method, as shown in Figure 1, includes:

Step 1: Obtain quotations from inter-provincial trading members and quotations from generator sets and electricity purchasers in the province;

Step 2: Based on the quotations of the inter-provincial transaction members, the pre-established inter-provincial main optimization model is used to calculate the first clear electricity quantity and the first electricity price of each inter-provincial market member;

Step 3: Calculate the second electricity volume and the second electricity price of each market member in the province by adopting the pre-established intra-provincial sub-optimization model according to the first electricity volume to be cleared and the first electricity price, as well as the quotations of the generator sets and electricity purchasers in the province. ; If the error between the first clearing electricity quantity and the second clearing electricity quantity and the first electricity price and the second electricity price is greater than the preset deviation value, then adjust the quotation strategy of the market members in the province, and recalculate the first electricity price. The amount of electricity to be cleared and the first price of electricity, the second of electricity to be cleared and the price of the second electricity, until the error between the first and the second amount of electricity to be cleared and the first and second electricity prices is less than the preset deviation value, the realization of Inter-provincial power balance;

The inter-provincial market members include: generator sets and electricity purchasers participating in inter-provincial transactions;

The intra-provincial market members include: generator sets located in the province, electricity purchasers, and foreign generator sets located in other provinces that participate in intra-provincial transactions.

Step 1: Obtain quotations from inter-provincial trading members and quotations from generator sets and electricity purchasers in the province;

Step 2: Based on the quotations of the inter-provincial transaction members, the pre-established inter-provincial main optimization model is used to calculate the first clear electricity quantity and the first electricity price of each inter-provincial market member;

Specifically, the pre-established inter-provincial main optimization model includes:

a first objective function and a plurality of first constraints;

The first constraints include: inter-provincial power generation and purchase balance constraints and inter-provincial available transmission capacity constraints.

Specifically, the inter-provincial power generation and purchase balance constraints are as follows:

线路损耗；In the formula,

line loss;

The inter-provincial available transport capacity constraints are as follows:

in:

T _lt ≤ ATC _lt

发电商i的发电量，

购电商j的购电量；T_lt：线路l在t时段的潮流；

发电商i对线路l在t时段潮流灵敏度分布因子；

购电商j对线路l在t时段潮流灵敏度分布因子；ATC_lt：线路l的可用输送能力。In the formula,

The power generation of generator i,

Electricity purchase of electricity purchaser j; T _lt : the power flow of line l in period t;

Distribution factor of power flow sensitivity of generator i to line l at time t;

The distribution factor of power flow sensitivity of electricity purchaser j to line l at time t; ATC _lt : the available transmission capacity of line l.

Specifically, the first objective function is as follows:

Max S ^tot =U ^con -C ^pla

In the formula, S ^tot : the target value of social benefit maximization; U ^con : the total quotation on the purchase side; C ^pla : the total quotation on the power generation side;

Wherein, the total quotation U ^con of the power purchase side is calculated as follows:

t时段购电方d的交易合约b的价格；

t时刻购电方d的交易合约b的电量；In the formula, d: electricity purchaser; D: electricity buyer set; b: transaction contract number; B: transaction contract set; t: quotation period; T: period set;

The price of the transaction contract b of the power purchaser d in the period t;

The electricity quantity of the transaction contract b of the power purchaser d at time t;

The total price C ^pla of the power generation side is calculated as follows:

t时段发电厂pla的价格；

t时段发电厂pla的电量。In the formula, pla: power plant; PLA: power plant set;

The price of the power plant pla at time t;

The amount of electricity in the power plant pla at time t.

Step 3: Calculate the second electricity volume and the second electricity price of each market member in the province by adopting the pre-established intra-provincial sub-optimization model according to the first electricity volume to be cleared and the first electricity price, as well as the quotations of the generator sets and electricity purchasers in the province. ; If the error between the first clearing electricity quantity and the second clearing electricity quantity and the first electricity price and the second electricity price is greater than the preset deviation value, then adjust the quotation strategy of the market members in the province, and recalculate the first electricity price. The amount of electricity to be cleared and the first price of electricity, the second of electricity to be cleared and the price of the second electricity, until the error between the first and the second amount of electricity to be cleared and the first and second electricity prices is less than the preset deviation value, the realization of Inter-provincial power balance;

Specifically, the pre-established intra-provincial sub-optimization model is used to calculate the second cleared electricity and the first electricity price of each market member in the province according to the first cleared electricity quantity and the first electricity price, as well as the quotations of the generator sets and electricity purchasers in the province. The second electricity price includes:

Calculate the power generation cost of the foreign generator sets located in other provinces that participate in the intra-provincial transaction based on the first cleared amount of electricity and the first electricity price;

Based on the power generation cost and the quotations of generator sets and electricity purchasers in the province, the pre-established intra-provincial sub-optimization model is used to calculate the second electricity volume and the second electricity price of each market member in the province.

Specifically, the pre-established intra-provincial sub-optimization model includes:

a second objective function and a plurality of second constraints;

The second constraints include: power supply and demand balance constraints in the control area, generator set operation constraints, network security constraints in the control area, and spinning reserve constraints.

Specifically, the power supply and demand balance constraints in the control area are as follows:

t时段发电机组s的发电出力，

t时段用户h净负荷，

省内系统t时段的总网损。in,

The power generation output of generator set s in period t,

the net load of user h in period t,

The total network loss of the system in the province during period t.

The operating constraints of the generator set are as follows:

发电机组s输出功率的上限；

发电机组s输出功率的下限；in,

The upper limit of the output power of the generator set s;

The lower limit of the output power of the generator set s;

The network security constraints in the control area are as follows:

t时段联络线断面u-v的正向潮流功率限制；

联络线断面u-v的反向潮流功率限制；

t时段联络线断面u-v的正向潮流功率值；

t时段联络线断面u-v的反向潮流功率值；in,

The forward power flow limit of the tie line section uv in the t period;

Reverse flow power limit of tie line section uv;

The forward power flow power value of the tie line section uv in the t period;

The reverse power flow power value of the tie line section uv in the t period;

The spinning reserve constraint is as follows:

机组s在t时提供的上调旋转备用；

系统t时的上调旋转备用需求；

机组s在t时提供的下调旋转备用；

系统t时的下调旋转备用需求。in,

The up-spinning reserve provided by unit s at time t;

The up-spinning reserve requirement at system t;

The down-regulated rotating reserve provided by unit s at time t;

The down-spinning reserve requirement at system t.

Specifically, the second objective function is as follows:

机组s在t时段的运行成本；K；市场交易期间的时段数；s：系统机组；S：系统机组数。In the formula, F: power generation cost;

Operating cost of unit s in period t; K; number of periods during market transaction; s: system unit; S: system unit number.

Specifically, the adjustment of the quotation strategy of market members in the province includes:

Based on the cost of power generation, the first electricity price of foreign wind turbines in other provinces that participate in intra-provincial transactions will be lowered.

Example 2:

An inter-provincial and intra-provincial power balance coordination optimization system, as shown in Figure 2, includes an acquisition module, a calculation module and an adjustment module;

Obtaining module: used to obtain the electricity price of inter-provincial and intra-provincial trading members;

The first calculation module: based on the quotations of the inter-provincial trading members, using a pre-established inter-provincial main optimization model to calculate the first electricity volume and the first electricity price of each market member between the provinces;

The second calculation module is used to calculate the second clear electricity of each market member in the province by adopting the pre-established intra-provincial sub-optimization model according to the first cleared electricity quantity and the first electricity price, as well as the quotations of the generator sets and electricity purchasers in the province. and the second electricity price; if the error between the first and second clearing electricity and the first electricity price and the second electricity price is greater than the preset deviation value, adjust the quotation strategy of the market members in the province, and recalculate all the The first clear electricity quantity and the first electricity price, the second clear electricity quantity and the second electricity price, until the error between the first clear electricity quantity and the second clear electricity quantity and the first electricity price and the second electricity price is less than the preset value Deviation value to achieve power balance between provinces;

The inter-provincial market members include: generator sets and electricity purchasers participating in inter-provincial transactions;

The market members in the province include: generator sets and electricity purchasers located in the province, and foreign generator sets located in other provinces that participate in intra-provincial transactions.

In the first calculation module, the pre-established inter-provincial main optimization model includes:

a first objective function and a plurality of first constraints;

The first constraints include: inter-provincial power generation and purchase balance constraints and inter-provincial available transmission capacity constraints.

Specifically, the inter-provincial power generation and purchase balance constraints are as follows:

线路损耗；In the formula,

line loss;

The inter-provincial available transport capacity constraint is as follows:

in:

T _lt ≤ ATC _lt

发电商i的发电量，

购电商j的购电量；T_lt：线路l在t时段的潮流；

发电商i对线路l在t时段潮流灵敏度分布因子；

购电商j对线路l在t时段潮流灵敏度分布因子；ATC_lt：线路l的可用输送能力。In the formula,

The power generation of generator i,

Electricity purchase of electricity purchaser j; T _lt : the power flow of line l in period t;

Distribution factor of power flow sensitivity of generator i to line l at time t;

The distribution factor of power flow sensitivity of electricity purchaser j to line l at time t; ATC _lt : the available transmission capacity of line l.

Specifically, the first objective function is as follows:

Max S ^tot =U ^con -C ^pla

In the formula, S ^tot : the target value of social benefit maximization; U ^con : the total quotation on the purchase side; C ^pla : the total quotation on the power generation side;

Wherein, the total quotation U ^con of the power purchase side is calculated as follows:

t时段购电方d的交易合约b的价格；

t时刻购电方d的交易合约b的电量；In the formula, d: electricity purchaser; D: electricity buyer set; b: transaction contract number; B: transaction contract set; t: quotation period; T: period set;

The price of the transaction contract b of the power purchaser d in the period t;

The electricity quantity of the transaction contract b of the power purchaser d at time t;

The total price C ^pla of the power generation side is calculated as follows:

t时段发电厂pla的价格；

t时段发电厂pla的电量。In the formula, pla: power plant; PLA: power plant set;

The price of the power plant pla at time t;

The amount of electricity in the power plant pla at time t.

In the second calculation module, the pre-established intra-provincial sub-optimization model is used to calculate the second clearing of each market member in the province according to the first clearing amount of electricity and the first electricity price, as well as the quotations of generator sets and electricity purchasers in the province. The amount of electricity and the second electricity price include:

Calculate the power generation cost of the foreign generator sets located in other provinces that participate in the intra-provincial transaction based on the first cleared amount of electricity and the first electricity price;

Based on the power generation cost and the quotations of generator sets and electricity purchasers in the province, the pre-established intra-provincial sub-optimization model is used to calculate the second electricity volume and the second electricity price of each market member in the province.

Specifically, the pre-established intra-provincial sub-optimization model includes:

a second objective function and a plurality of second constraints;

The second constraints include: power supply and demand balance constraints in the control area, generator set operation constraints, network security constraints in the control area, and spinning reserve constraints.

Specifically, the power supply and demand balance constraints in the control area are as follows:

t时段发电机组s的发电出力，

表示t时段用户h净负荷，

省内系统t时段的总网损。in,

The power generation output of generator set s in period t,

represents the net load of user h in period t,

The total network loss of the system in the province during period t.

The operating constraints of the generator set are as follows:

发电机组s输出功率的上限；

发电机组s输出功率的下限；in,

The upper limit of the output power of the generator set s;

The lower limit of the output power of the generator set s;

The network security constraints in the control area are as follows:

t时段联络线断面u-v的正向潮流功率限制；

联络线断面u-v的反向潮流功率限制；

t时段联络线断面u-v的正向潮流功率值；

t时段联络线断面u-v的反向潮流功率值；in,

The forward power flow power limit of the tie line section uv in the t period;

Reverse flow power limit of tie line section uv;

The forward power flow power value of the tie line section uv in the t period;

The reverse power flow power value of the tie line section uv in the t period;

The spinning reserve constraint is as follows:

为机组s在t时提供的上调旋转备用；

为系统t时的上调旋转备用需求；

为机组s在t时提供的下调旋转备用；

为系统t时的下调旋转备用需求。in,

Up-spinning reserve provided for unit s at time t;

is the upward spinning reserve requirement for system t;

It is the down-rotating reserve provided for the unit s at time t;

is the down-spinning reserve requirement at system t.

Specifically, the second objective function is as follows:

机组s在t时段的运行成本；K；市场交易期间的时段数；s：系统机组；S：系统机组数。In the formula, F: power generation cost;

Operating cost of unit s in period t; K; number of periods during market transaction; s: system unit; S: system unit number.

Specifically, the adjustment of the quotation strategy of market members in the province includes:

Based on the cost of power generation, the first electricity price of foreign wind turbines in other provinces that participate in intra-provincial transactions will be lowered.

Example 3

In the technical solution provided by the present invention, the inter-provincial transaction clearing power and electricity price results are incorporated into the intra-provincial optimization clearing model, so as to realize the coordinated coupling of inter-provincial and intra-provincial transactions, and the double-layer optimization problem can also be called as The two-level coordination coupling model and the two-level optimization clearing model framework are shown in Figure 3. The first-level optimization model is the inter-provincial main optimization model, and the second-level optimization model is the intra-provincial sub-optimization model. Its input data is divided into three categories: quotation data, topology data and network data. Among them, the quotation data mainly includes different types of quotation information; the topology data mainly refers to the node information of the physical power grid and the upper and lower quotation limits of each price zone, that is, the physical network model corresponding to each market member; the network data mainly includes various types of physical power grids. Constraints, such as unit operation constraints, tie line transmission capacity constraints, power purchase and sale balance constraints, etc. Output data: each market member clears the price and clears the electricity.

The coupled double-layer optimization clearing process is shown in Figure 4, and the specific steps are:

Step 1: Obtain the quotations of inter-provincial transaction members and the quotations of generator sets and electricity purchasers in the province.

Step 2: Based on the quotations of the inter-provincial transaction members, the pre-established inter-provincial main optimization model is used to calculate the first clear electricity quantity and the first electricity price of each inter-provincial market member.

Convert the two-layer optimization model into a first-level master-sub-optimization model. In the upper-level inter-provincial transaction, include the lower-level provincial simplified equivalent model, including equivalent power generation nodes and equivalent load nodes, and consider the balance of power generation and consumption of the whole network, provincial The transmission capacity of inter-connecting lines, but does not consider the network security constraints in the province;

Carry out inter-provincial optimization, and use the first clear electricity quantity and the first electricity price of the participating inter-provincial market members calculated by the inter-provincial optimization, that is, the electricity quantity and electricity price cleared by the inter-provincial generator sets and electricity purchasers, as the input conditions for the lower-level calculation Enter the lower-level optimization model. At this time, the generator units located in other provinces participating in the inter-provincial transaction are transformed into intra-provincial market members, as the sub-problem intra-provincial optimization transaction boundary, which refers to the participating inter-provincial market calculated by the inter-provincial optimization. The clearing electricity and electricity price of the generator sets and electricity purchasers will be entered into the lower layer optimization model as the input conditions of the lower layer calculation. Generating sets and electricity purchasers jointly participate in the market clearing in the province;

Step 3: Calculate the second electricity volume and the second electricity price of each market member in the province by adopting the pre-established intra-provincial sub-optimization model according to the first electricity volume to be cleared and the first electricity price, as well as the quotations of the generator sets and electricity purchasers in the province. ; If the error between the first clearing electricity quantity and the second clearing electricity quantity and the first electricity price and the second electricity price is greater than the preset deviation value, then adjust the quotation strategy of the market members in the province, and recalculate the first electricity price. Cleared quantity and the first electricity price, second cleared electricity and second electricity price, until the error between the first cleared electricity and the second cleared electricity and the first electricity price and the second electricity price is less than the preset deviation value, to achieve Inter-provincial power balance;

The inter-provincial market members include: generator sets and electricity purchasers participating in inter-provincial transactions;

The market members in the province include: generator sets and electricity purchasers located in the province, and foreign generator sets located in other provinces that participate in intra-provincial transactions.

The intra-provincial transaction performs sub-optimization calculations based on the detailed optimized clearing model, and obtains the second clearing electricity and electricity price of the intra-provincial market members, that is, the generator sets and electricity purchasers located in the province, and those located in other provinces who participate in intra-provincial transactions. The clear electricity and electricity price of external generator sets; when the clear electricity volume and electricity price of external generator sets located in other provinces calculated by sub-optimal clearing and the calculation result of inter-provincial optimization are greater than the set deviation value, that is Whether the external electricity and electricity prices in the province are consistent with the calculation results of the inter-provincial market.

Based on the cost of power generation, the electricity price of the foreign generators in other provinces participating in the intra-provincial transaction is lowered, and the optimization calculation of the inter-provincial transaction is performed again, until the clear electricity and electricity price of the foreign generators located in other provinces are consistent with the results of the inter-provincial optimization calculation. If the amount of electricity to be cleared and the price of electricity are less than the set deviation value, the optimal price and amount of electricity to be cleared for market members between provinces and within the province are obtained.

The standard for dividing the area in the present invention is: set the country as the first level, and set the level according to the distribution form of the power grid of the country;

In this embodiment, China is taken as an example, and China is set as the first level; China consists of five regions, which are the second level; and the second level regions include: the North China region, the Central China region, the East China region, the Northwest region and the Northeast region, Each region corresponds to multiple provinces. Taking the second level of East China as an example, the third level includes Jiangsu, Anhui, Zhejiang, Fujian and Shanghai. Although this embodiment takes China as an example, the present invention is not limited to China, and the mentioned province corresponds to the third level in the power grid.

The above facts show that: the technical solution provided by the present invention can formulate a definite inter-provincial and intra-provincial unified plan. For the same transaction cycle, the inter-provincial and intra-provincial unified platform organizes market transactions, and the inter-provincial transaction results are included as input conditions. Power balance. For example, in the day-a-day market, the clearing between provinces is synchronized with the clearing within the province, which avoids the iterative process of time sequence and transaction results, and effectively improves the efficiency of the two-level market organization. The transaction can optimize the power generation and consumption resources in the whole range, tap the transmission capacity of the power grid, and realize the real-time balance of electricity consumption between provinces.

Obviously, the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

As will be appreciated by those skilled in the art, the embodiments of the present application may be provided as a method, a system, or a computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the present application. It will be understood that each flow and/or block in the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to the processor of a general purpose computer, special purpose computer, embedded processor or other programmable data processing device to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing device produce Means for implementing the functions specified in a flow or flow of a flowchart and/or a block or blocks of a block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory result in an article of manufacture comprising instruction means, the instructions The apparatus implements the functions specified in the flow or flow of the flowcharts and/or the block or blocks of the block diagrams.

These computer program instructions can also be loaded on a computer or other programmable data processing device to cause a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process such that The instructions provide steps for implementing the functions specified in the flow or blocks of the flowcharts and/or the block or blocks of the block diagrams.

The above are only examples of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention are included in the application for pending approval of the present invention. within the scope of the claims.

Claims (10)

1. an inter-provincial and intra-provincial power balance coordination optimization method, is characterized in that, comprises: Obtain quotations from inter-provincial transaction members and quotations from generator sets and electricity purchasers in the province; Based on the quotations of the inter-provincial transaction members, the pre-established inter-provincial main optimization model is used to calculate the first electricity volume and the first electricity price of each inter-provincial market member; According to the first clear electricity quantity and the first electricity price as well as the quotations of generator sets and electricity purchasers in the province, the pre-established intra-provincial sub-optimization model is used to calculate the second clear electricity quantity and the second electricity price of each market member in the province; If the error between the first and second clearing electricity and the first electricity price and the second electricity price is greater than the preset deviation value, adjust the quotation strategy of the market members in the province, and recalculate the first clearing electricity and the second electricity price. The first electricity price, the second electricity price cleared, and the second electricity price, until the errors between the first electricity volume and the second electricity volume, and the first electricity price and the second electricity price are less than the preset deviation value, so as to realize the inter-provincial saving. Internal power balance; The inter-provincial market members include: generator sets and electricity purchasers participating in inter-provincial transactions; The intra-provincial market members include: generator sets located in the province, electricity purchasers, and foreign generator sets located in other provinces that participate in intra-provincial transactions. 2. The inter-province and intra-provincial power balance coordination optimization method according to claim 1, wherein the pre-established inter-provincial main optimization model comprises: a first objective function and a plurality of first constraints; The first constraints include: inter-provincial power generation and purchase balance constraints and inter-provincial available transmission capacity constraints. 3. The inter-province and intra-provincial power balance coordination optimization method as claimed in claim 2, wherein the inter-provincial power generation and purchase balance constraints are shown in the following formula:

In the formula,

line loss; The inter-provincial available transport capacity constraint is as follows:

in: T _lt ≤ ATC _lt In the formula,

The power generation of generator i,

Electricity purchase of electricity purchaser j; T _lt : the power flow of line l at time t;

Distribution factor of power flow sensitivity of generator i to line l at time t;

The distribution factor of power flow sensitivity of electricity purchaser j to line l at time t; ATC _lt : the available transmission capacity of line l. 4. The inter-province intra-province power balance coordination optimization method according to claim 3, wherein the first objective function is shown in the following formula: Max S ^tot =U ^con -C ^pla In the formula, S ^tot : the target value of social benefit maximization; U ^con : the total quotation on the purchase side; C ^pla : the total quotation on the power generation side; Wherein, the total quotation U ^con of the power purchase side is calculated as follows:

In the formula, d: electricity purchaser; D: electricity buyer set; b: transaction contract number; B: transaction contract set; t: quotation period; T: period set;

The price of the transaction contract b of the power purchaser d in the period t;

The electricity quantity of the transaction contract b of the power purchaser d at time t; The total price C ^pla of the power generation side is calculated as follows:

In the formula, pla: power plant; PLA: power plant set;

The price of the power plant pla at time t;

The amount of electricity in the power plant pla at time t. 5. The method for coordinating and optimizing inter-province and intra-province power balance as claimed in claim 1, wherein, according to the first clearing amount of electricity and the first electricity price, as well as the quotations of generator sets and electricity purchasing users in the province, the method is adopted in advance. The established intra-provincial sub-optimization model calculates the second clear electricity and the second electricity price of each market member in the province, including: Calculate the power generation cost of the foreign generator sets located in other provinces that participate in the intra-provincial transaction based on the first cleared amount of electricity and the first electricity price; Based on the power generation cost and the quotations of generator sets and electricity purchasers in the province, the pre-established intra-provincial sub-optimization model is used to calculate the second clearing amount of electricity and the second electricity price of each market member in the province. 6. The inter-province and intra-province power balance coordination optimization method according to claim 3, wherein the pre-established intra-province sub-optimization model comprises: a second objective function and a plurality of second constraints; The second constraints include: power supply and demand balance constraints in the control area, generator set operation constraints, network security constraints in the control area, and spinning reserve constraints. 7. The inter-province and intra-province power balance coordination and optimization method according to claim 6, wherein the power supply and demand balance constraints in the control area are as follows:

Among them, P _s ^t : the power generation output of the generator set s in the t period,

represents the net load of user h in period t,

The total network loss of the system in the province during period t. The operating constraints of the generator set are as follows:

in,

The upper limit of the output power of the generator set s;

The lower limit of the output power of the generator set s; The network security constraints in the control area are as follows:

in,

The forward power flow power limit of the tie line section uv in the t period;

Reverse flow power limit of tie line section uv;

The forward power flow power value of the tie line section uv in the t period;

The reverse power flow power value of the tie line section uv in the t period; The spinning reserve constraint is as follows:

in,

Up-spinning reserve provided for unit s at time t;

is the upward spinning reserve requirement for system t;

It is the down-rotating reserve provided for the unit s at time t;

is the down-spinning reserve requirement at system t. 8. The inter-province and intra-province power balance coordination optimization method according to claim 6, wherein the second objective function is shown in the following formula:

In the formula, F: power generation cost;

Operating cost of unit s in period t; K; number of periods during market transaction; s: system unit; S: system unit number. 9. The method for coordinating and optimizing inter-province and intra-provincial power balance as claimed in claim 1, wherein the adjustment of the quotation strategy of the intra-provincial market members comprises: Based on the cost of power generation, the first electricity price of foreign wind turbines in other provinces that participate in intra-provincial transactions will be lowered. 10. An inter-provincial and intra-provincial power balance coordination optimization system, characterized in that it comprises an acquisition module, a calculation module and an adjustment module; Obtaining module: used to obtain the electricity price of inter-provincial and intra-provincial trading members; The first calculation module: based on the quotations of the inter-provincial trading members, using the pre-established inter-provincial main optimization model to calculate the first clearing electricity and the first electricity price of each inter-provincial market member; The second calculation module is used to calculate the second clear electricity of each market member in the province by using the pre-established intra-provincial sub-optimization model according to the first clear electricity quantity and the first electricity price, as well as the quotations of the generator sets and electricity purchasers in the province. and the second electricity price; if the error between the first and second clearing electricity and the first electricity price and the second electricity price is greater than the preset deviation value, adjust the quotation strategy of the market members in the province, and recalculate all the The first clear electricity quantity and the first electricity price, the second clear electricity quantity and the second electricity price, until the error between the first clear electricity quantity and the second clear electricity quantity and the first electricity price and the second electricity price is less than the preset value Deviation value to achieve power balance between provinces; The inter-provincial market members include: generator sets and electricity purchasers participating in inter-provincial transactions; The market members in the province include: generator sets and electricity purchasers located in the province, and foreign generator sets located in other provinces that participate in intra-provincial transactions.

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