CN113554528B - Method and system for analyzing power spot market clearing result - Google Patents
Method and system for analyzing power spot market clearing result Download PDFInfo
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- CN113554528B CN113554528B CN202110863927.8A CN202110863927A CN113554528B CN 113554528 B CN113554528 B CN 113554528B CN 202110863927 A CN202110863927 A CN 202110863927A CN 113554528 B CN113554528 B CN 113554528B
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Abstract
The application relates to a method and a system for analyzing an electric power spot market clearing result, wherein the method comprises the following steps: and after the daily clear result is obtained, each index analysis is directly carried out, so that the timeliness of the analysis result is ensured. The current day clearing result at least comprises: and (5) a unit start-stop result, and a current day power price and a unit output result are settled. Correspondingly, the analysis of the clearing result comprises the following steps: analyzing the start and stop reasons of the unit, and generating analysis results of the start and stop reasons of the unit; performing unit limitation reason analysis to generate unit limitation reason analysis results; and carrying out electricity price analysis and section blocking reason analysis based on the unit limited reason analysis result to generate a current day settlement electricity price analysis result and a section blocking reason analysis result. And finally, integrating and outputting the unit start-stop reason analysis result, the unit limited reason analysis result, the current day settlement electricity price analysis result and the section blocking reason analysis result, so as to ensure the comprehensiveness of the analysis result and further determine the rationality of the clearing result.
Description
Technical Field
The application relates to the technical field of power data analysis, in particular to a method and a system for analyzing a power spot market clearing result.
Background
In the power spot market, the rationality and interpretability of the clearing results is critical, otherwise the market body will not be able to establish trust in the spot market. At present, a dispatcher mainly depends on limited manual experience to judge the rationality of the daily clear result, or performs data statistics analysis after the fact to obtain a conclusion of the rationality of the clear result, but the comprehensiveness is difficult to ensure by manual analysis, and the instantaneity cannot be ensured by the post-analysis.
Disclosure of Invention
In order to overcome the problem of lack of comprehensiveness and instantaneity of the related technology at least to a certain extent, the application provides a method and a system for analyzing the electric power spot market clearing result.
The scheme of the application is as follows:
according to a first aspect of embodiments of the present application, there is provided a method for analyzing a power spot market clearing result, including:
acquiring a current day clearing result; the current day clearing result at least comprises the following steps: a unit start-stop result, a current day settlement electricity price and a unit output result;
analyzing the start and stop reasons of the unit, and generating analysis results of the start and stop reasons of the unit;
performing unit limitation reason analysis to generate unit limitation reason analysis results;
performing electricity price analysis based on the unit limited reason analysis result to generate a current day settlement electricity price analysis result;
performing section blocking reason analysis based on the unit limited reason analysis result to generate a section blocking reason analysis result;
and integrating and outputting the unit start-stop reason analysis result, the unit limited reason analysis result, the current day settlement electricity price analysis result and the section blocking reason analysis result.
Preferably, in an implementation manner of the present application, the performing unit start-stop reason analysis includes:
acquiring the power generation cost, the grid-connected time and the continuous start-stop time of each unit;
judging the unit start-stop reasons corresponding to the unit start-stop results of each unit based on the power generation cost, the grid-connected time, the continuous start-stop time and whether the state of the unit start-stop results of each unit is changed after the unit start-stop results of each unit are subjected to network security constraint; wherein, the unit start-stop reasons at least include: earliest grid-tie time reasons, minimum start-up time reasons, designated status reasons, economic reasons and safety reasons.
Preferably, in one implementation manner of the present application, the performing unit limitation reason analysis includes:
obtaining the shadow prices of all physical parameter constraints of a unit, and judging whether the shadow prices of all physical parameter constraints of the unit are 0;
and determining the physical parameter constraint with the shadow price not being 0 as a unit limiting reason of the unit.
Preferably, in one implementation manner of the present application, the performing unit constraint reason analysis further includes:
and if the shadow price of all physical parameter constraints of the unit is 0, determining that the unit is not limited, and determining that the unit is a marginal unit of the node where the unit is located.
Preferably, in one implementation manner of the present application, the performing an electricity price analysis based on the analysis result of the unit limited reason includes:
judging whether the electricity price trend is reasonable or not;
if the electricity price trend is abnormal, judging the abnormal type and the abnormal period of the abnormal electricity price;
and judging the abnormal reason of the abnormal electricity price based on the analysis result of the limited reason of the unit.
Preferably, in one implementation manner of the present application, the determining whether the electricity price trend is reasonable includes:
acquiring a weighted average node electricity price sequence and a market load sequence of the nodes;
judging the closeness index of the correlation between the weighted average node electricity price sequence and the market load sequence based on the Pearson correlation coefficient index;
judging that the electricity price trend is reasonable when the affinity index of the correlation between the weighted average node electricity price sequence and the market load sequence is not smaller than a preset affinity index;
and judging that the electricity price trend is abnormal when the closeness degree index of the correlation between the weighted average node electricity price sequence and the market load sequence is smaller than a preset closeness degree index.
Preferably, in one implementation manner of the present application, the determining the abnormal type and the abnormal period of the abnormal electricity price includes:
judging the electricity price higher than the upper limit of a preset expected value of the electricity price in the electricity price trend as an excessive electricity price, and marking an abnormal period of the excessive electricity price;
judging the electricity price lower than the lower limit of a preset electricity price expected value in the electricity price trend as an excessively low electricity price, and marking an abnormal period of the excessively low electricity price;
and detecting the abrupt electricity price in the electricity price trend based on an isolated forest method, and marking the abrupt electricity price abnormal period.
Preferably, in an implementation manner of the present application, the determining, based on the analysis result of the unit limited cause, an abnormal cause of the abnormal electricity price includes:
judging whether blockage occurs in the current power grid;
if the current power grid is blocked, determining that the abnormality is caused by the blocking in the current power grid;
if no blockage occurs in the current power grid, judging an abnormal reason of the abnormal electricity price based on the analysis result of the limited reason of the unit; the reasons for the abnormality at least include: abnormal marginal units caused by abnormal unit quotation and abnormal constraint.
Preferably, in an implementation manner of the present application, the analyzing the cause of the section blockage based on the analysis result of the cause of the limitation of the unit includes:
judging whether the load flow of the node is abnormal or not;
if the node load flow is abnormal, determining that the section blocking cause is abnormal due to the node load flow;
if the node load flow is not abnormal, analyzing a section blocking reason according to a unit limiting reason with sensitivity to the section;
if no abnormality occurs in the node load flow, performing section blocking reason analysis according to a unit limited reason with sensitivity to sections, including:
if the unit has opposite sensitivity to different sections, determining that the section blocking cause is a section coupling cause;
if the unit is limited to stop, determining that the section blocking cause is a start-stop scheduling cause;
if the unit is limited by the upper and lower limits of the output force, determining that the section blocking is caused by economic dispatch.
According to a second aspect of embodiments of the present application, there is provided a system for analyzing a power spot market clearance result, comprising:
the acquisition module is used for acquiring the current day clearing result; the current day clearing result at least comprises the following steps: a unit start-stop result, a current day settlement electricity price and a unit output result;
the analysis module is used for analyzing the start-stop reasons of the unit and generating analysis results of the start-stop reasons of the unit; performing unit limitation reason analysis to generate unit limitation reason analysis results; performing electricity price analysis based on the unit limited reason analysis result to generate a current day settlement electricity price analysis result; performing section blocking reason analysis based on the unit limited reason analysis result to generate a section blocking reason analysis result;
and the output module is used for integrating and outputting the unit start-stop reason analysis result, the unit limited reason analysis result, the current day settlement electricity price analysis result and the section blocking reason analysis result.
The technical scheme that this application provided can include following beneficial effect: in the method for analyzing the power spot market clearing result, various index analysis is directly performed after the current day clearing result is obtained, so that timeliness of the analysis result is ensured. The current day clearing result at least comprises: and (5) a unit start-stop result, and a current day power price and a unit output result are settled. Correspondingly, the analysis of the clearing result comprises the following steps: analyzing the start and stop reasons of the unit, and generating analysis results of the start and stop reasons of the unit; performing unit limitation reason analysis to generate unit limitation reason analysis results; performing electricity price analysis based on the unit limited reason analysis result to generate a day settlement electricity price analysis result; and analyzing the cause of the section blockage based on the unit limited cause analysis result to generate a section blockage cause analysis result. And finally integrating and outputting the unit start-stop reason analysis result, the unit limited reason analysis result, the current day settlement electricity price analysis result and the section blocking reason analysis result, wherein the analysis result of the clearing result is obtained through instant data statistical analysis, so that the comprehensiveness of the analysis result is ensured, and the rationality of the clearing result can be further determined according to the analysis result of each clearing result.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.
FIG. 1 is a flow chart of a method for analyzing power spot market clearance results according to one embodiment of the present application;
FIG. 2 is a flow chart of a method for analyzing power spot market clearance results according to another embodiment of the present application;
FIG. 3 is a schematic flow chart of a method for analyzing a power spot market clearance result according to an embodiment of the present application, wherein the method is based on a unit-limited cause analysis result;
fig. 4 is a schematic structural diagram of a system for analyzing a power spot-market clearance result according to an embodiment of the present application.
Reference numerals: an acquisition module-21; an analysis module-22; and an output module-23.
Detailed Description
Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present application as detailed in the accompanying claims.
A method of analyzing power spot market clearance results, referring to fig. 1, comprising:
s11: acquiring a current day clearing result; the current day clearing result at least comprises: a unit start-stop result, a current day settlement electricity price and a unit output result;
in the power spot market, the rationality and interpretability of the clearing results are critical, and the clearing results generally comprise: and (5) a unit start-stop result, and a current day power price and a unit output result are settled. The results are used to publish to market subjects.
In order to ensure the timeliness of the rationality analysis of the clearing result, the clearing result on the same day is obtained in the method.
S12: analyzing the start and stop reasons of the unit, and generating analysis results of the start and stop reasons of the unit;
s13: performing unit limitation reason analysis to generate unit limitation reason analysis results;
s14: performing electricity price analysis based on the unit limited reason analysis result to generate a day settlement electricity price analysis result;
s15: analyzing the cause of the section blockage based on the analysis result of the unit limited cause to generate an analysis result of the cause of the section blockage;
s16: and integrating and outputting the unit start-stop reason analysis result, the unit limited reason analysis result, the current day settlement electricity price analysis result and the section blocking reason analysis result.
In the embodiment, the method aims at analyzing the start-stop result of the unit, and settling the electricity price on the same day and the accuracy, feasibility and rationality of the output result of the unit. And specific analysis results are generated, so that the market main body can know the current day and clear the results more deeply. Illustrating: the market subject sometimes challenges the clearing result, and the unit start-stop reason analysis result in the application provides corresponding explanation.
Since the clearing result does not comprise unit limitation, the unit limitation reason analysis is mainly performed in the application because electricity price analysis and section blockage reason analysis are performed by combining the unit limitation reason.
In the method for analyzing the power spot market clearing result, each index analysis is directly performed after the current day clearing result is obtained, so that timeliness of the analysis result is ensured. The current day clearing result at least comprises: and (5) a unit start-stop result, and a current day power price and a unit output result are settled. Correspondingly, the analysis of the clearing result comprises the following steps: analyzing the start and stop reasons of the unit, and generating analysis results of the start and stop reasons of the unit; performing unit limitation reason analysis to generate unit limitation reason analysis results; performing electricity price analysis based on the unit limited reason analysis result to generate a day settlement electricity price analysis result; and analyzing the cause of the section blockage based on the unit limited cause analysis result to generate a section blockage cause analysis result. And finally integrating and outputting the unit start-stop reason analysis result, the unit limited reason analysis result, the current day settlement electricity price analysis result and the section blocking reason analysis result, wherein in the embodiment, the analysis result of the clearing result is obtained through instant data statistics analysis, so that the comprehensiveness of the analysis result is ensured, and the rationality of the clearing result can be further determined according to the analysis result of each clearing result.
In some embodiments, the method for analyzing the power spot market clearing result, performing unit start-stop reason analysis, includes:
acquiring the power generation cost, the grid-connected time and the continuous start-stop time of each unit;
judging a unit start-stop reason corresponding to the unit start-stop result of each unit based on the power generation cost, the grid-connected time, the continuous start-stop time and whether the state of the unit start-stop result of each unit is changed after the unit start-stop result of each unit is subjected to network security constraint; the unit start-stop reasons at least comprise: earliest grid-tie time reasons, minimum start-up time reasons, designated status reasons, economic reasons and safety reasons.
In the analysis of the start-stop reasons of the unit, the power generation cost, the grid-connected time and the continuous start-stop time are constants which can be directly obtained.
The power generation cost will determine the start-stop result of the unit, and generally, the unit with low start-up cost and low quotation is started preferentially. The unit can be forced to stop due to insufficient grid connection time. The unit may also be forced on or off for periods that are linked to the initial daily period due to insufficient continuous on-off time.
When the analysis of the start-stop reasons of the unit is carried out, whether the start-stop result of the unit is constrained by network security or not needs to be considered. When there is a network security constraint, the start-stop state of the unit may be adjusted for security reasons, which may enable a high start-up cost unit to be started for alleviating the section blockage, and a low start-up cost unit to be shut down instead.
Therefore, the unit start-stop reasons corresponding to the start-stop result without network security constraint at least comprise: the earliest grid-connected time reason, the smallest starting and stopping time reason, the appointed state reason and the economic reason. And if the start-stop result with the network security constraint is different from the start-stop result without the network security constraint, the unit start-stop reason corresponding to the start-stop result with the network security constraint is considered as a security reason.
In some embodiments, the method for analyzing the power spot market clearing result, performing unit limitation reason analysis, includes:
the shadow prices of all physical parameter constraints of the unit are obtained, and whether the shadow prices of all physical parameter constraints of the unit are 0 is judged;
and determining the physical parameter constraint with the shadow price not being 0 as a unit limiting reason of the unit.
Whether the unit is limited can be judged by two methods. Firstly, checking whether physical parameter constraints related to a unit take an equal sign one by one to judge whether the resource is exhausted; and secondly, judging through the shadow price of the unit related physical parameter constraint.
The results of the first method may deviate, so the second method is used in this embodiment.
According to the complementary relaxation condition λg (x) =0 in the KKT condition
Wherein g (x) is less than or equal to 0, λ is greater than or equal to 0, λ is a lagrange multiplier of g (x), λ is greater than or equal to 0 if g (x) =0, and λ=0 if g (x) < 0.
If the shadow price is not 0, the group is considered to be limited, and if the shadow price is 0, the group is not limited.
When there is a multiple solution to the problem, the shadow price of the constraint may still be 0 even if the inequality takes an equal sign. There are situations where the aggregate output reaches the adjustable output upper limit but the shadow price is actually 0, at which point the aggregate should not be considered limited by such resources.
In this embodiment, whether the shadow price of the relevant physical parameter constraint of the unit is 0 may be determined one by one, and the physical parameter constraint with the shadow price not being 0 is determined as the unit limitation reason of the unit.
The reasons for crew limitations generally include: the unit can adjust the upper and lower limits of output and the up-down climbing capability. For example, if the shadow price of the adjustable output upper and lower limits of the unit is not 0, the reasons for limiting the unit include the adjustable output upper and lower limits of the unit.
Further, performing unit limitation cause analysis, further comprising:
if the shadow price of all physical parameter constraints of the unit is 0, determining that the unit is not limited, and determining that the unit is a marginal unit of the node where the unit is located.
The node electricity price is essentially the variation of the total network cost caused by the micro-increment of the unit load of the node, and the marginal machine set is a machine set for providing micro-increment force to balance the micro-increment load of the node. If the unit is limited, the micro-increment force cannot be provided, so that whether the unit is a marginal unit can be judged by determining whether the unit is limited. If the shadow price of all physical parameter constraints of the unit is 0, determining that the unit is not limited, and determining that the unit is a marginal unit of the node where the unit is located.
In some embodiments, the method for analyzing the power spot market clearing result, based on the unit limited reason analysis result, performs electricity price analysis, includes:
judging whether the electricity price trend is reasonable or not;
if the electricity price trend is abnormal, judging the abnormal type and abnormal period of the abnormal electricity price;
and judging the abnormal reason of the abnormal electricity price based on the analysis result of the limited reason of the unit.
In this embodiment, the electricity price analysis is performed to first determine whether the electricity price trend is reasonable, and if so, the subsequent steps are not executed. If the electricity price trend is abnormal, judging the abnormal type and abnormal period of the abnormal electricity price. And finally, judging the abnormal reason of the abnormal electricity price based on the analysis result of the limited reason of the unit.
In some embodiments, the method for analyzing the power spot market clearing result, determining whether the power price trend is reasonable includes:
acquiring a weighted average node electricity price sequence and a market load sequence of the nodes;
judging the closeness index of the correlation between the weighted average node electricity price sequence and the market load sequence based on the Pearson correlation coefficient index;
when the affinity index of the correlation between the weighted average node electricity price sequence and the market load sequence is not less than the preset affinity index, judging that the electricity price trend is reasonable;
and judging that the electricity price trend is abnormal when the affinity index of the correlation between the weighted average node electricity price sequence and the market load sequence is smaller than the preset affinity index.
In general, node load and load change show positive correlation, namely, the larger the load is, the higher the node electricity price is. In order to quantify the correlation between the two, in this embodiment, pearson correlation coefficient indexes are used to quantify the degree of closeness of the correlation between the weighted average node electricity price sequence and the market load sequence.
In order to improve the accuracy of the electricity price analysis, the preset affinity index is set to 0.8 in the present embodiment. Namely, when the preset affinity index is not less than 0.8, the electricity price trend is judged to be reasonable, otherwise, the electricity price trend is judged to be abnormal, and further analysis is needed.
In some embodiments, the method for analyzing the power spot market clearing result, determining an abnormal type and an abnormal period of an abnormal electricity price includes:
judging the electricity price higher than the upper limit of the preset expected value of the electricity price in the electricity price trend as the excessive electricity price, and marking the abnormal time period of the excessive electricity price;
judging the electricity price lower than the lower limit of the preset electricity price expected value in the electricity price trend as the too low electricity price, and marking the abnormal time period of the too low electricity price;
and detecting the abrupt electricity price in the electricity price trend based on an isolated forest method, and marking the abrupt electricity price abnormal period.
Three types of abnormal electricity prices are mainly considered in the present embodiment: too high electricity rates, too low electricity rates, and abrupt electricity rates. All three abnormal electricity prices reflect the price risk of the electricity market to a certain extent.
The excessive power rate and the excessive power rate are mainly determined by setting a fixed upper limit of the expected value of the power rate and a fixed lower limit of the expected value of the power rate, and if the power rate is higher than the upper limit of the expected value of the preset power rate or lower than the lower limit of the expected value of the preset power rate, the abnormal price is determined.
The abrupt change of electricity price is mainly reflected in the obvious change of the electricity price trend in the adjacent time period. In order to reduce the dependence on manual marking and obtain a result quickly, the method for identifying abnormal electricity prices based on isolated forests in the embodiment detects abrupt electricity prices. In addition, the method for identifying the abnormal electricity price of the isolated forest does not need to calculate distance or density, has linear complexity and has higher speed compared with other abnormal detection methods.
In some embodiments, the method for analyzing the power spot market clearing result, based on the unit limited reason analysis result, judges the abnormal reason of the abnormal electricity price, includes:
judging whether blockage occurs in the current power grid;
if the current power grid is blocked, determining that the abnormal reason is that the current power grid is blocked;
if no blockage occurs in the current power grid, judging an abnormal reason of the abnormal electricity price based on a unit limited reason analysis result; the reasons for the abnormality at least include: abnormal marginal units caused by abnormal unit quotation and abnormal constraint.
If there is a blockage in the grid at this time, the cause of the electricity price abnormality is generally caused by the blockage. When a cross section reaches the boundary, the shadow price has no upper limit theoretically. For example, set A, B, C, D is four nodes, respectively, 1 is a cross-section between A-B, 2 is a cross-section between B-C, 3 is a cross-section between C-D, and 4 is a cross-section between A-D. The node A is provided with a generator set, and the node D is provided with a load. Assume that sections 1, 2, 3 are all out of limit, while section 4 is bounded. According to the definition of the shadow price, if the limit of the section 4 is relaxed by 1MW, more than 1MW power flows to the load through the section 4, so that under the condition of unchanged load, the sections 1, 2 and 3 can relieve the 1MW out-of-limit, and the total cost can be reduced by 3 times of penalty factors. Therefore, if the cross-section reaches the boundary, the value of the shadow price can theoretically far exceed the penalty factor. Therefore, when congestion occurs, the node electricity rate result is liable to be abnormal.
If the whole network is not blocked, the electricity price is equal to the quotation of the marginal machine set. If abnormal electricity prices occur at this time, it can be inferred that the unit price is higher (lower) or that the "unit which should not be a margin" takes on an additional 1MW of power generation task. This is typically because the non-marginal units are limited by other constraints, and therefore require further explanation in connection with unit-limited cause analysis results.
In some embodiments, a method for analyzing a power spot market clearing result, performing a section blocking cause analysis based on a unit limited cause analysis result, referring to fig. 2, includes:
judging whether the load flow of the node is abnormal or not;
if the node load flow is abnormal, determining that the section blocking cause is abnormal due to the node load flow;
if the node load flow is not abnormal, analyzing the section blocking reason according to the unit limiting reason of the unit with sensitivity to the section; comprising the following steps:
if the unit has sensitivity in opposite directions to a plurality of sections, determining that the section blocking cause is a section coupling cause;
if the unit is limited to stop, determining that the section blocking cause is a start-stop scheduling cause;
if the unit is limited by the upper and lower limits of the output force, determining that the section blocking is caused by economic dispatch.
Section blocking includes section reaching limits and section out-of-limit.
The section flow calculation formula can be expressed as:
F S ＝G k-s P G -G l-s P D
wherein: f (F) S Is the section tide; g k-s The power transfer distribution factors of the section S are the nodes where the generator sets are located; g l-s A power transfer distribution factor of the load node to the section S; p (P) G Is the output vector of the unit; p (P) D Is the node load.
The analysis of the cause of the section blockage mainly comprises the following steps:
1. judging whether the load flow of the node is abnormal
In the market clearing process, the node load flow is usually used as a boundary condition of the market, and if the section is still out of limit after the maximum adjustment capability of all the starting units is considered, the node load flow and the link line data are judged to be abnormal.
2. And when no abnormality occurs in the node load flow, checking all reasons of unit limitation with sensitivity to the section.
The limited capacity of the unit to regulate tide in the limitation of the unit is an important cause of section blockage. In this embodiment, the section blocking reason is divided into a section coupling reason, a start-stop scheduling reason and an economic scheduling reason according to the limited reason of the unit. The section coupling reasons are mainly reflected in that the unit has sensitivity to a plurality of sections at the same time, and even has opposite sensitivity to different sections, which can lead to difficulties in adjusting section tide and even to longer calculation time. The start-stop scheduling reasons are mainly characterized in that the machine set is limited to stop when the machine set optimizes the output. The economic dispatch reasons are mainly characterized in that the unit is limited by the upper and lower limits of the output when optimizing the output.
A system for analyzing power spot market clearance results, referring to fig. 3, comprising:
an acquisition module 21, configured to acquire a current day clearing result; the current day clearing result at least comprises: a unit start-stop result, a current day settlement electricity price and a unit output result;
the analysis module 22 is used for analyzing the start-stop reasons of the unit and generating analysis results of the start-stop reasons of the unit; performing unit limitation reason analysis to generate unit limitation reason analysis results; performing electricity price analysis based on the unit limited reason analysis result to generate a day settlement electricity price analysis result; analyzing the cause of the section blockage based on the analysis result of the unit limited cause to generate an analysis result of the cause of the section blockage;
and the output module 23 is used for integrating and outputting the unit start-stop reason analysis result, the unit limited reason analysis result, the current day settlement electricity price analysis result and the section blocking reason analysis result.
In the system for analyzing the power spot market clearing result in the embodiment, each index analysis is directly performed after the current day clearing result is obtained, so that timeliness of the analysis result is ensured. The current day clearing result at least comprises: and (5) a unit start-stop result, and a current day power price and a unit output result are settled. Correspondingly, the analysis of the clearing result comprises the following steps: analyzing the start and stop reasons of the unit, and generating analysis results of the start and stop reasons of the unit; performing unit limitation reason analysis to generate unit limitation reason analysis results; performing electricity price analysis based on the unit limited reason analysis result to generate a day settlement electricity price analysis result; and analyzing the cause of the section blockage based on the unit limited cause analysis result to generate a section blockage cause analysis result. And finally integrating and outputting the unit start-stop reason analysis result, the unit limited reason analysis result, the current day settlement electricity price analysis result and the section blocking reason analysis result, wherein the analysis result of the clearing result is obtained through the instant data statistical analysis in the method, so that staff can directly determine the rationality of the clearing result according to the analysis result of each clearing result.
In some embodiments, the system for analyzing the electric power spot market clearing result is further configured to obtain the power generation cost, the grid-connected time and the continuous start-stop time of each unit by using the obtaining module 21;
the analysis module 22 is specifically configured to determine a unit start-stop reason corresponding to a unit start-stop result of each unit based on the power generation cost, the grid-connected time, the continuous start-stop time, and whether the unit start-stop result of each unit is constrained by network security; the unit start-stop reasons at least comprise: earliest grid-tie time reasons, minimum start-up time reasons, designated status reasons, economic reasons and safety reasons.
In some embodiments, the system for analyzing the power spot market clearing result is further configured to obtain a shadow price of all physical parameter constraints of the unit, and determine whether the shadow price of each physical parameter constraint of the unit is 0;
the analysis module 22 is specifically configured to determine a physical parameter constraint that the shadow price is not 0 as a cause of unit limitation of the unit; if the shadow price of all physical parameter constraints of the unit is 0, determining that the unit is not limited, and determining that the unit is a marginal unit of the node where the unit is located.
In some embodiments, the system for analyzing the electric power spot market clearing result, the analysis module 22 is specifically configured to determine whether the electricity price trend is reasonable; if the electricity price trend is abnormal, judging the abnormal type and abnormal period of the abnormal electricity price; and judging the abnormal reason of the abnormal electricity price based on the analysis result of the limited reason of the unit.
Wherein, judge whether the price trend is reasonable, include:
acquiring a weighted average node electricity price sequence and a market load sequence of the nodes; judging the closeness index of the correlation between the weighted average node electricity price sequence and the market load sequence based on the Pearson correlation coefficient index; when the affinity index of the correlation between the weighted average node electricity price sequence and the market load sequence is not less than the preset affinity index, judging that the electricity price trend is reasonable; and judging that the electricity price trend is abnormal when the affinity index of the correlation between the weighted average node electricity price sequence and the market load sequence is smaller than the preset affinity index.
Judging the abnormal type and abnormal period of the abnormal electricity price, comprising:
judging the electricity price higher than the upper limit of the preset expected value of the electricity price in the electricity price trend as the excessive electricity price, and marking the abnormal time period of the excessive electricity price; judging the electricity price lower than the lower limit of the preset electricity price expected value in the electricity price trend as the too low electricity price, and marking the abnormal time period of the too low electricity price; and detecting the abrupt electricity price in the electricity price trend based on an isolated forest method, and marking the abrupt electricity price abnormal period.
Judging the abnormal reason of the abnormal electricity price, comprising: judging whether blockage occurs in the current power grid; if the current power grid is blocked, determining that the abnormal reason is that the current power grid is blocked; if no blockage occurs in the current power grid, judging an abnormal reason of the abnormal electricity price based on a unit limited reason analysis result; the reasons for the abnormality at least include: the unit quotation group is abnormal, and the non-marginal units of the nodes bear additional power generation tasks.
In some embodiments, the system for analyzing the power spot market clearing result is the analysis module 22, which is specifically configured to determine whether the node load flow is abnormal; if the node load flow is abnormal, determining that the section blocking cause is abnormal due to the node load flow; if the node load flow is not abnormal, analyzing the section blocking reason according to the unit limiting reason of the unit with sensitivity to the section; comprising the following steps: if the unit has opposite sensitivity to different sections, determining that the section blocking cause is a section coupling cause; if the unit is limited to stop, determining that the section blocking cause is a start-stop scheduling cause; if the unit is limited by the upper and lower limits of the output force, determining that the section blocking is caused by economic dispatch.
An apparatus for analyzing electrical power spot market clearance results, comprising:
a processor and a memory;
the processor is connected with the memory through a communication bus:
the processor is used for calling and executing the program stored in the memory;
and a memory for storing a program for performing at least one of the methods of any of the above embodiments for analyzing the power spot market clearance results.
A storage medium storing a computer program which, when executed by a processor, performs the steps of a method of analysing a power spot market clearing result according to the above embodiments of the present invention.
It is to be understood that the same or similar parts in the above embodiments may be referred to each other, and that in some embodiments, the same or similar parts in other embodiments may be referred to.
It should be noted that in the description of the present application, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Furthermore, in the description of the present application, unless otherwise indicated, the meaning of "plurality" means at least two.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and further implementations are included within the scope of the preferred embodiment of the present application in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present application.
It is to be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above-described embodiments, the various steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, may be implemented using any one or combination of the following techniques, as is well known in the art: discrete logic circuits having logic gates for implementing logic functions on data signals, application specific integrated circuits having suitable combinational logic gates, programmable Gate Arrays (PGAs), field Programmable Gate Arrays (FPGAs), and the like.
Those of ordinary skill in the art will appreciate that all or a portion of the steps carried out in the method of the above-described embodiments may be implemented by a program to instruct related hardware, where the program may be stored in a computer readable storage medium, and where the program, when executed, includes one or a combination of the steps of the method embodiments.
In addition, each functional unit in each embodiment of the present application may be integrated in one processing module, or each unit may exist alone physically, or two or more units may be integrated in one module. The integrated modules may be implemented in hardware or in software functional modules. The integrated modules may also be stored in a computer readable storage medium if implemented in the form of software functional modules and sold or used as a stand-alone product.
The above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, or the like.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present application have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the application, and that variations, modifications, alternatives, and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the application.
Claims (5)
1. A method of analyzing an electrical power spot market clearing result, comprising:
acquiring a current day clearing result; the current day clearing result at least comprises the following steps: a unit start-stop result, a current day settlement electricity price and a unit output result;
analyzing the start and stop reasons of the unit, and generating analysis results of the start and stop reasons of the unit;
performing unit limitation reason analysis to generate unit limitation reason analysis results;
performing electricity price analysis based on the unit limited reason analysis result to generate a current day settlement electricity price analysis result;
performing section blocking reason analysis based on the unit limited reason analysis result to generate a section blocking reason analysis result;
integrating and outputting the unit start-stop reason analysis result, the unit limited reason analysis result, the current day settlement electricity price analysis result and the section blocking reason analysis result;
the unit start-stop reason analysis comprises the following steps:
acquiring the power generation cost, the grid-connected time and the continuous start-stop time of each unit;
judging the unit start-stop reasons corresponding to the unit start-stop results of each unit based on the power generation cost, the grid-connected time, the continuous start-stop time and whether the state of the unit start-stop results of each unit is changed after the unit start-stop results of each unit are subjected to network security constraint; wherein, the unit start-stop reasons at least include: earliest grid-connected time reasons, minimum start-up time reasons, specified state reasons, economic reasons and safety reasons;
the unit limitation reason analysis comprises the following steps:
obtaining the shadow prices of all physical parameter constraints of a unit, and judging whether the shadow prices of all physical parameter constraints of the unit are 0;
determining the physical parameter constraint of which the shadow price is not 0 as a unit limited reason of the unit;
the electricity price analysis based on the analysis result of the unit limited reason further comprises:
judging whether the electricity price trend is reasonable or not;
if the electricity price trend is abnormal, judging the abnormal type and the abnormal period of the abnormal electricity price;
judging the abnormal reason of the abnormal electricity price based on the analysis result of the limited reason of the unit;
the judging the abnormal reason of the abnormal electricity price based on the analysis result of the limited reason of the unit comprises the following steps:
judging whether blockage occurs in the current power grid;
if the current power grid is blocked, determining that the abnormality is caused by the blocking in the current power grid;
if no blockage occurs in the current power grid, judging an abnormal reason of the abnormal electricity price based on the analysis result of the limited reason of the unit; the reasons for the abnormality at least include: abnormal marginal units caused by abnormal unit quotation and abnormal constraint;
the section blocking reason analysis based on the unit limited reason analysis result comprises the following steps:
judging whether the load flow of the node is abnormal or not;
if the node load flow is abnormal, determining that the section blocking cause is abnormal due to the node load flow;
if the node load flow is not abnormal, analyzing a section blocking reason according to a unit limiting reason with sensitivity to the section;
if no abnormality occurs in the node load flow, performing section blocking reason analysis according to a unit limited reason with sensitivity to sections, including:
if the unit has opposite sensitivity to different sections, determining that the section blocking cause is a section coupling cause;
if the unit is limited to stop, determining that the section blocking cause is a start-stop scheduling cause;
if the unit is limited by the upper and lower limits of the output force, determining that the section blocking is caused by economic dispatch.
2. The method of claim 1, wherein the performing crew restriction cause analysis further comprises:
and if the shadow price of all physical parameter constraints of the unit is 0, determining that the unit is not limited, and determining that the unit is a marginal unit of the node where the unit is located.
3. The method of claim 1, wherein determining whether the electricity price trend is reasonable comprises:
acquiring a weighted average node electricity price sequence and a market load sequence of the nodes;
judging the closeness index of the correlation between the weighted average node electricity price sequence and the market load sequence based on the Pearson correlation coefficient index;
judging that the electricity price trend is reasonable when the affinity index of the correlation between the weighted average node electricity price sequence and the market load sequence is not smaller than a preset affinity index;
and judging that the electricity price trend is abnormal when the closeness degree index of the correlation between the weighted average node electricity price sequence and the market load sequence is smaller than a preset closeness degree index.
4. The method according to claim 1, wherein the judging of the abnormality type and the abnormality period of the abnormal electricity rate includes:
judging the electricity price higher than the upper limit of a preset expected value of the electricity price in the electricity price trend as an excessive electricity price, and marking an abnormal period of the excessive electricity price;
judging the electricity price lower than the lower limit of a preset electricity price expected value in the electricity price trend as an excessively low electricity price, and marking an abnormal period of the excessively low electricity price;
and detecting the abrupt electricity price in the electricity price trend based on an isolated forest method, and marking the abrupt electricity price abnormal period.
5. A system for analyzing electrical power spot market clearance results, comprising:
the acquisition module is used for acquiring the current day clearing result; the current day clearing result at least comprises the following steps: a unit start-stop result, a current day settlement electricity price and a unit output result;
the analysis module is used for analyzing the start-stop reasons of the unit and generating analysis results of the start-stop reasons of the unit; performing unit limitation reason analysis to generate unit limitation reason analysis results; performing electricity price analysis based on the unit limited reason analysis result to generate a current day settlement electricity price analysis result; performing section blocking reason analysis based on the unit limited reason analysis result to generate a section blocking reason analysis result;
the output module is used for integrating and outputting the unit start-stop reason analysis result, the unit limited reason analysis result, the current day settlement electricity price analysis result and the section blocking reason analysis result;
the unit start-stop reason analysis comprises the following steps:
acquiring the power generation cost, the grid-connected time and the continuous start-stop time of each unit;
judging the unit start-stop reasons corresponding to the unit start-stop results of each unit based on the power generation cost, the grid-connected time, the continuous start-stop time and whether the state of the unit start-stop results of each unit is changed after the unit start-stop results of each unit are subjected to network security constraint; wherein, the unit start-stop reasons at least include: earliest grid-connected time reasons, minimum start-up time reasons, specified state reasons, economic reasons and safety reasons;
the unit limitation reason analysis comprises the following steps:
obtaining the shadow prices of all physical parameter constraints of a unit, and judging whether the shadow prices of all physical parameter constraints of the unit are 0;
determining the physical parameter constraint of which the shadow price is not 0 as a unit limited reason of the unit;
the electricity price analysis based on the unit limited reason analysis result comprises the following steps:
judging whether the electricity price trend is reasonable or not;
if the electricity price trend is abnormal, judging the abnormal type and the abnormal period of the abnormal electricity price;
judging the abnormal reason of the abnormal electricity price based on the analysis result of the limited reason of the unit;
the judging the abnormal reason of the abnormal electricity price based on the analysis result of the limited reason of the unit comprises the following steps:
judging whether blockage occurs in the current power grid;
if the current power grid is blocked, determining that the abnormality is caused by the blocking in the current power grid;
if no blockage occurs in the current power grid, judging an abnormal reason of the abnormal electricity price based on the analysis result of the limited reason of the unit; the reasons for the abnormality at least include: abnormal marginal units caused by abnormal unit quotation and abnormal constraint;
the section blocking reason analysis based on the unit limited reason analysis result comprises the following steps:
judging whether the load flow of the node is abnormal or not;
if the node load flow is abnormal, determining that the section blocking cause is abnormal due to the node load flow;
if the node load flow is not abnormal, analyzing a section blocking reason according to a unit limiting reason with sensitivity to the section;
if no abnormality occurs in the node load flow, performing section blocking reason analysis according to a unit limited reason with sensitivity to sections, including:
if the unit has opposite sensitivity to different sections, determining that the section blocking cause is a section coupling cause;
if the unit is limited to stop, determining that the section blocking cause is a start-stop scheduling cause;
if the unit is limited by the upper and lower limits of the output force, determining that the section blocking is caused by economic dispatch.
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| CN112906918B (en) * | 2021-03-10 | 2023-04-07 | 广东电网有限责任公司电力调度控制中心 | Method and device for checking start-stop rationality of clear result unit combination |
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| CN110807589A (en) * | 2019-10-31 | 2020-02-18 | 广东电网有限责任公司 | Case analysis system of electric power spot market |
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