CN113506156A - Market clearing method for one-stage bidding of demand side market main body and generator set - Google Patents
Market clearing method for one-stage bidding of demand side market main body and generator set Download PDFInfo
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Abstract
The invention discloses a market clearing method for bidding on the same station of a demand side market main body and a generator set, and a specific clearing program comprises the following steps: step 1: solving a safety constraint unit combination problem considering the quotation of the demand side; step 2: solving a safety constraint economic dispatching problem considering the quotation of the demand side; and step 3: calculating the node electricity price considering the price quoted by the demand side; and 4, step 4: performing safety check, and if the safety check is passed, executing the step 6; if the safety check does not pass, executing the step 5; and 5: modifying the system operation boundary conditions and the unit operation constraint conditions, and turning to the step 1; step 6: correcting a load prediction curve of a corresponding bus node based on a bid winning result on a demand side and carrying out secondary clearing on a power generation side to obtain a unit combination problem only considering the price quoted by a generator set; and 7: solving an economic dispatching problem only considering the generator set quotation; and 8: and calculating the node electricity price only considering the generator set quotation.
Description
Technical Field
The invention relates to the field of electric power spot market mechanisms, in particular to a market clearing method for bidding on the same station of a demand side market main body and a generator set.
Background
Power consumers have considerable regulatory potential and require effective marketing mechanisms to guide their exploitation. With the continuous improvement of the electric power spot market mechanism and the gradual release of the user side market, the replacement of the traditional electric power demand side management by demand side response transaction has become the development trend of the electric power market, and the bringing of demand side resources into the spot market transaction has a far-reaching development prospect. At present, the demand side of the spot market in China adopts a participation mode of not reporting the price at the present stage, and the demand elasticity of the user is guided by the price cleared in the market at the present day, so that the method is a passive user response mode. With the construction of the spot market, market bodies are gradually grown, and demand-side market bodies enter the spot market, so that demand-side responses can actively participate in market bidding.
The invention discloses a market clearing method for bidding a demand side market main body and a generator set at the same station, which can realize respective pricing of the demand side and the generator set, inhibit the random quotation behavior of part of the generation side market main body and encourage the market main body to reasonably quote.
Disclosure of Invention
The invention discloses a market clearing method for the same bidding of a demand side market main body and a generator set, which is beneficial to solving the problems of large peak-valley difference of a power grid and severe load fluctuation, can realize the respective pricing of the demand side and the generator set, can improve the initiative of the demand side main body in the market and the enthusiasm of participating in the market as much as possible under the condition of not influencing the benefit of the market main body, can avoid the influence of demand response bidding behaviors on the market price, and is beneficial to stabilizing the normal operation order of the spot market.
A market clearing method for a demand side market main body and a generator set bidding on the same station comprises the following steps that firstly, a system operation mechanism issues demand side response information to the demand side market main body; then, after receiving the demand side response information, the demand side market main body submits the demand side quotation information to a system operator; secondly, the system operation structure carries out a clearing stage; finally, the system operator publishes a clearing result; the clearing stage of the system operation structure specifically comprises the following steps:
step 1: and solving the safety constraint unit combination problem considering the quotation of the demand side. The safety constraint unit combination problem is a target function with the minimum sum of electricity purchasing cost, generator set starting cost and demand side response cost, and the target function is as follows:
wherein:Tthe number of total time periods is indicated,
the total number of the generator sets is represented,
the number of market entities on the demand side is represented,
and
respectively representing the output of the genset and demand side responses,
represents the starting cost of the generator set,
representing the operating cost of the generator set, as follows:
wherein:
indicating generator setsiIn thattIn the first periodmThe price quoted for the segments is,
indicating generator setsiIn thattIn the first periodmThe output of the generator set of the section,
and the total number of the sections of the output of the generator set.
wherein:
representing demand side market entitiesjIn thattIn the first periodmThe price quoted for the segments is,
indicating a demand-side response attIn the first periodmThe force exerted by the segments is such that,
and (4) the total number of the sub-sections of the force is applied to the response of the demand side.
Solving the combination problem of the safety constraint unit needs to satisfy the following constraint conditions:
（1）
formula (1) is the electric power balance constraint condition of safety constraint unit combination problem, wherein:
is composed oftSubtracting provincial junctor input power from the time interval power system load;
（2）
equation (2) is the positive reserve capacity constraint of the safety constraint unit combination problem, where:
indicating generator setsiIn thattThe on-off state of the time period,
indicating that the generator set is shut down,
indicating that the generator set is turned on,
to representt(ii) a time-horizon power system positive reserve capacity requirement;
（3）
equation (3) is the negative reserve capacity constraint of the safety constraint unit combination problem, where:
indicating generator setsiIn thattThe minimum force to be applied during the time period,
to representtThe time slot power system is subject to a negative backup capacity requirement. The generator set start-stop state when considering the demand-side quote can be obtained in step 1 and is transmitted to step 2.
Step 2: according to the starting and stopping state of the generator set transmitted in the step 1, the output of the generator set in the stopping state is set to be 0, then the safety constraint economic dispatching problem considering the quotation of the demand side is solved, and the quotation of the demand side is considered but the starting and stopping cost of the generator set is not considered; the safety constraint economic dispatching problem is a target function of minimizing the sum of the electricity purchasing cost and the demand side response cost, and the target function is as follows:
wherein: the safety constraint economic dispatching problem needs to satisfy the following constraint conditions of power balance constraint conditions, generator set down-climbing constraint conditions and generator set up-climbing constraint conditions.
The formula of the constraint condition of the generator set for climbing downwards is as follows:
（4）
in the formula (4)
Indicating generator setsiThe maximum down-hill climbing rate.
The formula of the climbing constraint condition on the generator set is as follows:
（5）
in the formula (5)
Indicating generator setsiThe maximum rate of ascent. Step 2 is executed to obtain generator set output information, demand side output information and a Lagrange multiplier corresponding to the power balance constraint, and then the generator set output information and the demand side output information are transmitted into step 4 and the Lagrange multiplier is transmitted into step 3;
and step 3: calculating the node electricity price considering the price quoted at the demand side according to the Lagrange multiplier introduced in the step 3
And the value of the lagrangian multiplier is equal to the lagrangian multiplier corresponding to the power balance constraint condition of the safety constraint economic scheduling problem in the step 2.
And 4, step 4: and (4) performing safety check according to the generator set output information and the demand side output information transmitted in the step (2). If the safety check is passed, executing the step 6; and if the safety check is not passed, executing the step 5.
And 5: modifying the operation boundary conditions of the power system and the combined constraint conditions of all the safety constraint units, and turning to the step 1;
step 6: correcting a load prediction curve of a corresponding bus node based on a bid winning result on a demand side, carrying out second clearing on a power generation side, and solving a unit combination problem only considering the quotation of a generator set, wherein the unit combination problem takes the minimum sum of electricity purchasing cost and generator set starting and stopping cost as an objective function, and the following formula is as follows
Only considering the unit combination problem of the generator set quotation, the following constraint conditions of power supply and demand balance constraint conditions, positive reserve capacity constraint and negative reserve capacity constraint are required to be met, wherein the positive reserve capacity constraint and the negative reserve capacity constraint are the same as those in the step 1;
the power supply and demand balance constraint conditions are as follows:
（6）
in the formula (6)
Representing the demand side response contribution calculated in step 2. Step 6 is executed to obtain the starting and stopping state of the generator set when the price quoted by the demand side is not considered, and the starting and stopping state is transmitted to step 7;
and 7: setting the output of the generator set in the shutdown state to be 0 according to the startup and shutdown state of the generator set transmitted in the step 6, and then solving an economic dispatching problem when the price quoted by the demand side is not considered, wherein the economic dispatching problem takes the minimum electricity purchasing cost as an objective function, and the following formula is adopted
The economic scheduling problem needs to satisfy the following constraint conditions:
（6）
the above equation (6) is the power supply and demand balance constraint condition of the economic dispatching problem,
（4）
the above formula (4) is the constraint condition of generator set down-grade climbing for economic dispatching problem,
（5）
the upper formula (5) is a generator set up-grade climbing constraint condition of the economic dispatching problem; step 7 is executed to obtain the generator set output information and the Lagrangian multiplier corresponding to the power supply and demand balance constraint condition, and the Lagrangian multiplier is transmitted to step 8;
and 8: calculating the node electricity price without considering the price quoted on the demand side according to the Lagrange multiplier introduced in the step 7
Its value is equal to the lagrange multiplier of the power supply and demand balance constraint in step 7.
Preferably, the demand-side quotation information described in step 1, step 2 and step 3 comprises segment-by-segment quotation information, and the quotation curve monotonically increases as the response volume increases.
Preferably, the safety check in step 4 is divided into a power balance check and a safety and stability check. The safety and stability check comprises ground state power flow check and static safety analysis; the ground state tide checking method comprises the following steps of checking that the transmission power of a line/section under the ground state tide flow does not exceed a limit value and the voltage level of a system bus does not exceed the limit value by using an alternating current tide model; the static safety analysis is based on an expected fault set, and an alternating current power flow model is adopted for on-off analysis, so that the condition that the load of equipment in the expected fault set does not exceed the post-accident current limit value and the system bus voltage does not exceed the limit is ensured.
Preferably, the boundary conditions in step 5 include an operating state of the generator set, upper and lower limits of output of the generator set, earliest grid connection time of the generator set, a heating plan of the cogeneration set, and a primary energy supply of the generator set.
Preferably, the load prediction curve described in step 6 is obtained by a load prediction program of the power scheduling mechanism.
Has the advantages that: the invention provides a market clearing method for bidding on a same station of a demand side market main body and a generator set, which comprises the steps of 1, obtaining a generator set combination result under the condition of considering demand side bidding so as to determine the start-stop state of the generator set, and 2, determining the clearing result of demand side bidding according to the generator set start-stop state obtained in the step 1; further, step 3, calculating a clearing price according to the clearing result obtained in step 2, wherein the clearing result obtained in step 2 and the clearing price obtained in step 3 are winning results of the demand side market body; step 4, performing safety check according to the result obtained in the step 2 to determine whether the results obtained in the step 2 and the step 3 can meet the operation requirement of the power system; on the basis, step 6 and step 7 take the bid winning result of the demand side in step 1 and step 2 as the known condition to carry out clearing calculation again, and step 6 obtains the starting and stopping state of the generator set without considering the bid bidding condition of the demand side; step 7, determining the output of the generator set in the starting state according to the starting and stopping state of the generator set obtained in the step 6; and 8, calculating the clearing price of each node according to the result obtained in the step 7, wherein the output of the generator set obtained in the step 7 and the clearing price obtained in the step 8 are the winning result of the generator set. The clearing method calculates the winning bid result of the demand side market subject in the steps 2 and 3, and then calculates the winning bid result of the generating set in the steps 7 and 8, and the step clearing mode can guarantee the benefits of the demand side market subject and other market subjects.
The clearing method can inhibit the random quotation behavior of part of the power generation side market main bodies and encourage the reasonable quotation. In the clearing method provided by the invention, the pricing of the generator set is still determined by an actual generator set quotation curve, and the phenomenon that the price of the generator set is increased and the benefit of a user is influenced due to the fact that the quotation is raised by a market main body on a demand side can be avoided. The invention can realize the price pricing of the demand side quotation and the generator set respectively, and can improve the initiative of the demand side market main body and the enthusiasm for participating in the market as much as possible under the condition of not influencing the benefit of the market main body.
Drawings
FIG. 1 is a flow chart of a market clearing method for bidding on the same station of a demand side market main body and a generator set provided by the invention.
Fig. 2 is a diagram of a specific working embodiment of the market clearing method for the same bidding of the demand-side market main body and the generator set.
Fig. 3 is a block diagram of the steps of the present invention.
Detailed Description
In order to more clearly explain the technical solution of the present invention, the following detailed description is made with reference to fig. 2.
As shown in fig. 1-3, the invention discloses a market clearing method for bidding on the same station of a demand side market main body and a generator set, which can realize respective pricing of the demand side and the generator set, and can improve the initiative of the demand side main body in the market and the enthusiasm of participating in the market as much as possible under the condition of not influencing the benefit of the market main body; the method comprises the following concrete steps:
A. and (5) a demand release stage. On the day before the operation day, when a system operation mechanism predicts that a power supply gap possibly exists in a power grid, the system operation mechanism determines to start demand response, and issues demand side response information to a demand side market main body, wherein the demand side response information comprises a demand side response time interval and a demand side response area.
B. And (5) a market declaration phase. And after receiving the demand side response information, the demand side market main body makes a day-ahead market bidding decision according to the response capability and submits demand side quotation information to a system operator. The demand side market body adopts a sectional volume-reporting price-offering mode, and the price-offering curve is monotonically increased along with the increase of the demand side response quantity.
C. And (4) a discharging stage. The method comprises the following steps that a system operator executes a spot market and demand side response combined optimization clearing program according to quotation information of a demand side market main body and system operation boundary information, and specifically comprises the following steps:
step 1: solving a safety constraint unit combination problem considering the price quoted by the demand side, wherein the safety constraint unit combination problem takes the minimum sum of the electricity purchase cost, the starting cost of the generator set and the response cost of the demand side as an objective function, and the following formula is adopted:
wherein:Tthe number of total time periods is indicated,
the total number of the generator sets is represented,
the number of market entities on the demand side is represented,
and
respectively representing the output of the generator set and the response output of the demand side,
represents the starting cost of the generator set,
representing the operating cost of the generator set, as follows:
wherein:
indicating generator setsiIn thattIn the first periodmThe price quoted for the segments is,
indicating generator setsiIn thattIn the first periodmThe output of the generator set of the section,
the total number of the sections of the output of the generator set,
representing the demand side response cost, as follows:
wherein:
representing demand side market entitiesjIn thattIn the first periodmThe price quoted for the segments is,
indicating a demand-side response attIn the first periodmThe force exerted by the segments is such that,
responding the total number of the output sections for the demand side;
solving the combination problem of the safety constraint unit needs to satisfy the following constraint conditions:
（1）
formula (1) is the electric power balance constraint condition of safety constraint unit combination problem, wherein:
is composed oftSubtracting provincial junctor input power from the time interval power system load;
（2）
equation (2) is the positive reserve capacity constraint of the safety constraint unit combination problem, where:
indicating generator setsiIn thattThe on-off state of the time period,
indicating that the generator set is shut down,
indicating that the generator set is turned on,
to representt(ii) a time-horizon power system positive reserve capacity requirement;
（3）
equation (3) is the negative reserve capacity constraint of the safety constraint unit combination problem, where:
indicating generator setsiIn thattMinimum force for a time period;
to representtWhen the step 1 is executed, the starting and stopping state of the generator set can be obtained when the quotation of the demand side is considered, and the state is transmitted to the step 2;
step 2: according to the starting and stopping state of the generator set transmitted in the step 1, the output of the generator set in the stopping state is set to be 0, then the safety constraint economic dispatching problem considering the quotation of the demand side is solved, and the quotation of the demand side is considered but the starting and stopping cost of the generator set is not considered; the safe and economic dispatching problem is a target function of minimizing the sum of the electricity purchasing cost and the demand side response cost, and the target function is as follows:
wherein:
the safety constraint economic dispatching problem needs to satisfy the power balance constraint condition, the generator set down-climbing constraint condition and the generator set up-climbing constraint condition:
the formula of the constraint condition of the generator set for climbing downwards is as follows:
（4）
wherein the content of the first and second substances,
indicating generator setsiThe maximum down-hill climbing rate of (c),
the formula of the climbing constraint condition on the generator set is as follows:
（5）
wherein the content of the first and second substances,
indicating generator setsiThe step 2 is executed to obtain generator set output information, demand side output information and a Lagrange multiplier corresponding to power balance constraint, and then the generator set output information and the demand side output information are transmitted into the step 4 and the Lagrange multiplier is transmitted into the step 3;
and step 3: calculating the node electricity price considering the price quoted at the demand side according to the Lagrange multiplier introduced in the step 2
And the value of the lagrangian multiplier is equal to that of the power balance constraint condition in the step 2.
And 4, step 4: performing safety check according to the generator set output information and the demand side output information transmitted in the step 2, and executing a step 6 if the safety check is passed; if the safety check does not pass, executing the step 5;
and 5: modifying the operation boundary conditions of the power system and the combined constraint conditions of all the safety constraint units, and turning to the step 1;
step 6: correcting a load prediction curve of a corresponding bus node based on a bid winning result on a demand side, carrying out second clearing on a power generation side, and solving a unit combination problem only considering the quotation of a generator set, wherein the unit combination problem takes the minimum sum of electricity purchasing cost and starting cost of the generator set as a target function, and the following formula is as follows:
the unit combination problem of only considering the generator set quotation needs to satisfy the power supply and demand balance constraint condition, the positive reserve capacity constraint and the negative reserve capacity constraint:
wherein the positive spare capacity constraint and the negative spare capacity constraint are the same as in step 1,
（6）
the above formula is the electric power supply and demand balance constraint condition of the unit combination problem, wherein:
representing the demand side response contribution calculated in step 2.
Step 6 is executed to obtain the starting and stopping state of the generator set, and the starting and stopping state of the generator set is transmitted to step 7;
and 7: and 6, according to the starting and stopping state of the generator set transmitted in the step 6, setting the output of the generator set in the stopping state as 0, and solving the economic dispatching problem when the bidding of the demand side is not considered. The economic dispatching problem takes the minimum electricity purchasing cost as an objective function, and the following formula is adopted
Wherein:
the economic scheduling problem needs to satisfy the following constraint conditions:
（6）
the above equation (6) is the power supply and demand balance constraint condition of the economic dispatching problem,
（4）
the upper formula (4) is the constraint condition of the generator set for the economic dispatching problem to climb downwards, and the formula is the middle formula
For generating setsiIn thatt-a generated power for a period of 1,
（5）
the formula (5) is a generator set up-grade climbing constraint condition of the economic dispatching problem, the step 7 is executed to obtain generator set output information and a Lagrange multiplier corresponding to the power supply and demand balance constraint condition, and the Lagrange multiplier is transmitted to the step 8;
and 8: calculating the node electricity price without considering the price quoted by the demand side according to the Lagrange multiplier transmitted in the step 7
Its value is equal to the lagrange multiplier of the power supply and demand balance constraint in step 7.
The market clearing method for the same-stage bidding of the demand side market main body and the generator set is characterized in that the demand side quotation information in the steps 1, 2 and 3 comprises sectional report quotation information, and the quotation curve monotonically increases along with the increase of the response quantity.
The market clearing method for the same-stage bidding of the demand side market main body and the generator set comprises a safety check step 4 and a safety stability check step. The safety and stability check comprises ground state power flow check and static safety analysis; the ground state tide checking method comprises the following steps of checking that the transmission power of a line/section under the ground state tide flow does not exceed a limit value and the voltage level of a system bus does not exceed the limit value by using an alternating current tide model; the static safety analysis is based on an expected fault set, and an alternating current power flow model is adopted for on-off analysis, so that the condition that the load of equipment in the expected fault set does not exceed the post-accident current limit value and the system bus voltage does not exceed the limit is ensured.
The market clearing method for the demand side market main body and the generator set bidding on the same station is characterized in that the boundary conditions in the step 5 comprise the operation state of the generator set, the upper and lower output limits of the generator set, the earliest grid connection time of the generator set, a heat supply plan of a cogeneration set and the primary energy supply of the generator set.
The market clearing method for the same-stage bidding of the demand side market main body and the generator set is characterized in that the load prediction curve in the step 6 is obtained through a load prediction program of a power dispatching mechanism.
C. And (4) publishing a clearing result by a system operator, wherein the clearing result comprises the demand side output information obtained in the step 2, the power generation unit starting and stopping state obtained in the step 6, the power generation unit output information obtained in the step 7 and the node electricity price obtained in the step 8.
Claims (5)
1. A market clearing method for a demand side market main body and a generator set bidding on the same station is characterized in that firstly, on the day before the operation day, when a system operation mechanism predicts that a power grid possibly has a power supply gap, a demand response is determined to be started, and demand side response information is issued to the demand side market main body; then, after receiving the demand side response information, the demand side market main body makes a day-ahead market bidding decision according to the response capability and submits demand side quotation information to a system operator; secondly, the system operator executes the spot market and demand side response combined optimization clearing program according to the quotation information of the demand side market main body and the system operation boundary information; finally, the system operator publishes a clearing result; the clearing program carried out by the system operation mechanism specifically comprises the following steps:
step 1: solving a safety constraint unit combination problem considering the price quoted by the demand side, wherein the safety constraint unit combination problem takes the minimum sum of the electricity purchase cost, the starting cost of the generator set and the response cost of the demand side as an objective function, and the following formula is adopted:
wherein:Tthe number of total time periods is indicated,
the total number of the generator sets is represented,
the number of market entities on the demand side is represented,
and
respectively representing the output of the generator set and the response output of the demand side,
represents the starting cost of the generator set,
representing the operating cost of the generator set, as follows:
wherein:
indicating generator setsiIn thattIn the first periodmThe price quoted for the segments is,
indicating generator setsiIn thattIn the first periodmThe output of the generator set of the section,
the total number of the sections of the output of the generator set,
representing the demand side response cost, as follows:
wherein:
representing demand side market entitiesjIn thattIn the first periodmThe price quoted for the segments is,
indicating a demand-side response attIn the first periodmThe force exerted by the segments is such that,
responding the total number of the output sections for the demand side;
solving the combination problem of the safety constraint unit needs to satisfy the following constraint conditions:
（1）
formula (1) is the electric power balance constraint condition of safety constraint unit combination problem, wherein:
is composed oftSubtracting provincial junctor input power from the time interval power system load;
（2）
equation (2) is the positive reserve capacity constraint of the safety constraint unit combination problem, where:
indicating generator setsiIn thattThe on-off state of the time period,
indicating that the generator set is shut down,
indicating that the generator set is turned on,
to representt(ii) a time-horizon power system positive reserve capacity requirement;
（3）
equation (3) is the negative reserve capacity constraint of the safety constraint unit combination problem, where:
indicating generator setsiIn thattMinimum force for a time period;
to representtWhen the step 1 is executed, the starting and stopping state of the generator set can be obtained when the quotation of the demand side is considered, and the state is transmitted to the step 2;
step 2: according to the starting-up and stopping state of the generator set transmitted in the step 1, the output of the generator set in the stopping state is set to be 0, and then a safety constraint economic scheduling problem considering the price quoted by the demand side is solved, wherein the safety economic scheduling problem takes the minimum sum of the electricity purchasing cost and the response cost of the demand side as a target function, and the following formula is adopted:
wherein:
the safety constraint economic dispatching problem needs to satisfy the power balance constraint condition, the generator set down-climbing constraint condition and the generator set up-climbing constraint condition:
the formula of the constraint condition of the generator set for climbing downwards is as follows:
（4）
wherein the content of the first and second substances,
indicating generator setsiThe maximum down-hill climbing rate of (c),
the formula of the climbing constraint condition on the generator set is as follows:
（5）
wherein the content of the first and second substances,
indicating generator setsiThe maximum climbing rate of the generator set is obtained by executing the step 2, and the output information of the generator set and the output information of the demand side are obtained so as toAnd a Lagrange multiplier corresponding to the power balance constraint, transmitting the generator set output information and the demand side output information into the step 4, and transmitting the Lagrange multiplier into the step 3;
and step 3: calculating the node electricity price considering the price quoted at the demand side according to the Lagrange multiplier introduced in the step 2
The value of the lagrangian multiplier is equal to that of the corresponding power balance constraint condition in the step 2;
and 4, step 4: performing safety check according to the generator set output information and the demand side output information transmitted in the step 2, and executing a step 6 if the safety check is passed; if the safety check does not pass, executing the step 5;
and 5: modifying the operation boundary conditions of the power system and the combined constraint conditions of all the safety constraint units, and turning to the step 1;
step 6: correcting a load prediction curve of a corresponding bus node based on a bid winning result on a demand side, carrying out second clearing on a power generation side, and solving a unit combination problem only considering the quotation of a generator set, wherein the unit combination problem takes the minimum sum of electricity purchasing cost and starting cost of the generator set as an objective function, and the following formula is as follows
The unit combination problem of only considering the generator set quotation needs to satisfy the power supply and demand balance constraint condition, the positive reserve capacity constraint and the negative reserve capacity constraint:
wherein the positive spare capacity constraint and the negative spare capacity constraint are the same as in step 1,
（6）
the above formula is the electric power supply and demand balance constraint condition of the unit combination problem, wherein:
representing the demand side response output calculated in the step 2;
step 6 is executed to obtain the starting and stopping state of the generator set, and the starting and stopping state of the generator set is transmitted to step 7;
and 7: setting the output of the generator set in the shutdown state as 0 according to the startup and shutdown state of the generator set transmitted in the step 6, and solving an economic scheduling problem when the price bidding of a demand side is not considered, wherein the economic scheduling problem takes the minimum electricity purchasing cost as an objective function, and the following formula is adopted
Wherein:
the economic scheduling problem needs to satisfy the following constraint conditions:
（6）
the above equation (6) is the power supply and demand balance constraint condition of the economic dispatching problem,
（4）
the upper formula (4) is the constraint condition of the generator set for the economic dispatching problem to climb downwards, and the formula is the middle formula
For generating setsiIn thatt-a generated power for a period of 1,
（5）
the formula (5) is a generator set up-grade climbing constraint condition of the economic dispatching problem, the step 7 is executed to obtain generator set output information and a Lagrange multiplier corresponding to the power supply and demand balance constraint condition, and the Lagrange multiplier is transmitted to the step 8;
and 8: calculating the node electricity price without considering the price quoted by the demand side according to the Lagrange multiplier transmitted in the step 7
Its value is equal to the lagrange multiplier of the power supply and demand balance constraint in step 7.
2. The market clearing method for the demand-side market entity bidding on the same station as the generator set according to claim 1, wherein the demand-side quotation information in steps 1, 2 and 3 comprises segment-by-segment quotation information, and the quotation curve monotonically increases as the response volume increases.
3. The market clearing method for the same-stage bidding of the demand-side market subject and the generator set according to claim 1, wherein the safety check in the step 4 is divided into a power balance check and a safety stability check, and the safety stability check comprises a ground state power flow check and a static safety analysis; the ground state tide checking method comprises the following steps of checking that the transmission power of a line/section under the ground state tide flow does not exceed a limit value and the voltage level of a system bus does not exceed the limit value by using an alternating current tide model; the static safety analysis is based on an expected fault set, and an alternating current power flow model is adopted for on-off analysis, so that the condition that the load of equipment in the expected fault set does not exceed the post-accident current limit value and the system bus voltage does not exceed the limit is ensured.
4. The market clearing method for the same-stage bidding of the demand-side market entity and the generator set according to claim 1, wherein the boundary conditions in the step 5 comprise an operation state of the generator set, upper and lower limits of output of the generator set, the earliest available grid-connection time of the generator set, a heating plan of the cogeneration set and a primary energy supply of the generator set.
5. The market clearing method for the same bid on the demand-side market entity and the generator set according to claim 1, wherein the load prediction curve in step 6 is obtained by a load prediction program of a power dispatching entity.
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