CN114156892B - Regional power grid future power flow power balancing method, system, equipment and storage medium - Google Patents

Regional power grid future power flow power balancing method, system, equipment and storage medium Download PDF

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CN114156892B
CN114156892B CN202111450770.2A CN202111450770A CN114156892B CN 114156892 B CN114156892 B CN 114156892B CN 202111450770 A CN202111450770 A CN 202111450770A CN 114156892 B CN114156892 B CN 114156892B
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power
load
sensitivity
power generation
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CN114156892A (en
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王淼
於益军
孙博
黄海煜
耿琳
王超
郑晓雨
罗雅迪
吕闫
李媛媛
张翔宇
张梦凡
张贲
石上丘
邹鹏
荣玉
李劲松
路轶
张国芳
韩巍
马晓忱
郎燕生
宋旭日
陶蕾
黄运豪
孙略
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State Grid Corp of China SGCC
China Electric Power Research Institute Co Ltd CEPRI
State Grid Shanxi Electric Power Co Ltd
North China Grid Co Ltd
State Grid Sichuan Electric Power Co Ltd
Economic and Technological Research Institute of State Grid Shanxi Electric Power Co Ltd
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State Grid Corp of China SGCC
China Electric Power Research Institute Co Ltd CEPRI
State Grid Shanxi Electric Power Co Ltd
North China Grid Co Ltd
State Grid Sichuan Electric Power Co Ltd
Economic and Technological Research Institute of State Grid Shanxi Electric Power Co Ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/04—Circuit arrangements for ac mains or ac distribution networks for connecting networks of the same frequency but supplied from different sources
    • H02J3/06—Controlling transfer of power between connected networks; Controlling sharing of load between connected networks
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/003—Load forecast, e.g. methods or systems for forecasting future load demand
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/004—Generation forecast, e.g. methods or systems for forecasting future energy generation
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/007—Arrangements for selectively connecting the load or loads to one or several among a plurality of power lines or power sources
    • H02J3/0075—Arrangements for selectively connecting the load or loads to one or several among a plurality of power lines or power sources for providing alternative feeding paths between load and source according to economic or energy efficiency considerations, e.g. economic dispatch
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
    • H02J3/14—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by switching loads on to, or off from, network, e.g. progressively balanced loading
    • H02J3/144—Demand-response operation of the power transmission or distribution network
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
    • H02J3/466—Scheduling the operation of the generators, e.g. connecting or disconnecting generators to meet a given demand
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
    • H02J2203/10—Power transmission or distribution systems management focussing at grid-level, e.g. load flow analysis, node profile computation, meshed network optimisation, active network management or spinning reserve management
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
    • H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
    • Y02B70/3225—Demand response systems, e.g. load shedding, peak shaving
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/20—End-user application control systems
    • Y04S20/222—Demand response systems, e.g. load shedding, peak shaving

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  • Power Engineering (AREA)
  • Supply And Distribution Of Alternating Current (AREA)
  • Management, Administration, Business Operations System, And Electronic Commerce (AREA)

Abstract

The invention provides a method, a system, equipment and a storage medium for balancing future tidal current power of a regional power grid, wherein the method comprises the following steps: acquiring plan and prediction data reported by each first area, generating a future topology of the power grid, and calculating the sensitivity of the node to a branch and the sensitivity of the node to the loss; calculating the system network loss variable quantity according to the power generation and load variable quantity and the node-to-network loss sensitivity, and calculating the tie line variable quantity according to the power generation and load variable quantity and the node-to-branch sensitivity; and calculating the system unbalance according to the system network loss variation and the tie line variation, and distributing the system unbalance to power generation or load nodes by taking the tie line balance as a target. According to the method, the system power and the tie line power are pre-balanced before the load flow calculation is started according to the node pair system network loss and the tie line sensitivity, so that the load flow iteration times can be effectively reduced, and meanwhile, the calculation accuracy and the result rationality are improved.

Description

Regional power grid future power flow power balancing method, system, equipment and storage medium
Technical Field
The invention belongs to the field of power dispatching, and relates to a method, a system, equipment and a storage medium for balancing future tidal current power of a regional power grid.
Background
Under the three-level dispatching and two-level market mode, the regional power grid safety check plays an important role in guaranteeing the safe operation of the power grid, the accuracy of the power grid flow is an important factor influencing the safety check rationality in the future, and the balance of the system power needs to meet the balance of each province power and the balance of the power of the cross-province tie lines.
The safety check of the regional power grid on the data of the inter-provincial market and the provincial market is an important means for guaranteeing the safe operation of the power grid in a two-level market and a three-level scheduling mode, whether the flow result of the regional power grid is accurate or not directly influences the rationality of the safety check of the regional power grid, but the quality of data such as power generation plans, load prediction, maintenance plans and the like reported by each province is different, the condition that the data of market provinces and non-market provinces coexist can also occur, and the problems that the unbalanced power of a system is unreasonably distributed and the power of a cross-provincial connecting line deviates from a preset plan easily occur.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a method, a system, equipment and a storage medium for balancing the future power flow of a regional power grid.
In order to achieve the purpose, the invention adopts the following technical scheme:
a regional power grid future power flow power balancing method is characterized by comprising the following steps:
acquiring plan and prediction data reported by each first area, generating a future topology of the power grid, and calculating the sensitivity of the node to a branch and the sensitivity of the node to the loss;
calculating the system network loss variable quantity according to the power generation and load variable quantity and the node-to-network loss sensitivity, and calculating the tie line variable quantity according to the power generation and load variable quantity and the node-to-branch sensitivity;
and calculating the system unbalance according to the system network loss variation and the tie line variation, and distributing the system unbalance to power generation or load nodes by taking the tie line balance as a target.
As a further improvement of the invention, the planning and prediction data reported by each first area are obtained, a future topology of the power grid is generated, and the node-to-branch sensitivity and the node-to-network loss sensitivity are calculated; the method comprises the following steps:
forecasting and reporting the plan and the forecast data to a second regional power grid according to the spot-market of each first region and the safety check date requirement, and superposing the plan and the forecast data on the basis of the historical operation section of the power grid by the second regional power grid;
generating a check day power grid topological structure according to the topological structure of the historical operation section of the power grid and a start-up and shut-down plan, an equipment maintenance plan and a load switching plan of a generator set reported by each first area on the check day;
and calculating the sensitivity of the power generation nodes and the load nodes to the system loss and the sensitivity of the power generation nodes and the load nodes to the cross-first area tie line according to the future topological structure of the power grid.
As a further refinement of the invention, the planning and forecasting data includes cross-regional tie-line planning data, cross-first-region tie-line planning data and first-region-level power generation planning, load forecasting, and overhaul planning data.
As a further improvement of the present invention, the calculating the system network loss variation according to the power generation and load variation and the node-to-network loss sensitivity, and calculating the tie line variation according to the power generation and load variation and the node-to-branch sensitivity includes the following steps:
calculating the active variable quantity of the power generation node and the load node, and adopting the following method:
Figure BDA0003385175770000031
Figure BDA0003385175770000032
wherein i and j are node index numbers, m and n are the number of the power generation nodes and the load nodes respectively,
Figure BDA0003385175770000033
and &>
Figure BDA0003385175770000034
The power variation, delta P, of the ith power generation node and the jth load node respectively G And Δ P D The total power change quantity of the power generation node and the load node is based on>
Figure BDA0003385175770000035
And &>
Figure BDA0003385175770000036
In the planning power of the ith generation node and the jth load node respectively, based on the comparison result>
Figure BDA0003385175770000037
And &>
Figure BDA0003385175770000038
Respectively setting the initial power of the ith power generation node and the jth load node;
calculating the system network loss variation by adopting the following method:
Figure BDA0003385175770000039
wherein Δ P loss As the amount of variation in the system network loss,
Figure BDA00033851757700000310
and &>
Figure BDA00033851757700000311
The sensitivity of the ith power generation node and the jth load node to the system network loss is respectively set;
and (3) calculating the link line variable quantity by adopting the following method:
Figure BDA00033851757700000312
wherein k is the index of the tie lines, N is the number of the tie lines,
Figure BDA00033851757700000313
is the change of the kth tie line>
Figure BDA00033851757700000314
Sensitivity of the ith power generation node to the kth tie line, < >>
Figure BDA00033851757700000315
Sensitivity of the kth tie for the jth load node.
As a further improvement of the present invention, the method for sharing the system unbalance amount to the nodes with the goal of maintaining the tie line balance comprises the following specific steps:
the system unbalance equation is as follows:
ΔP＝ΔP D +ΔP loss -ΔP G
wherein, the delta P is the system unbalance amount and the generated energy required to be increased by the power generation node, and is selectively borne by an unplanned unit;
the variation of the unplanned unit needs to meet the following requirements:
Figure BDA0003385175770000041
wherein i is the node index of the unplanned unit in the m power generation nodes,
Figure BDA0003385175770000042
for the planned power of the kth tie line, <' > H>
Figure BDA0003385175770000043
Initial power for the kth link;
after adjustment, the output for the unplanned unit is as follows:
Figure BDA0003385175770000044
as a further improvement of the present invention, after the distributing the system unbalance amount to the power generation or load node, the method further includes:
the checking of the power balance condition and the tie line power balance condition specifically includes:
returning to recalculate the system unbalance amount delta P and the tie line variation
Figure BDA0003385175770000045
The following conditions need to be satisfied:
Figure BDA0003385175770000046
and if the system unbalance and the tie line variable quantity meet the requirements, starting load flow calculation to generate a future load flow section.
A regional grid future power flow power balancing system comprising:
the first calculation module is used for acquiring plan and prediction data reported by each province, generating a future topology of a power grid and calculating the sensitivity of nodes to branch/network loss;
the second calculation module is used for calculating the system network loss variation according to the power generation and load variation and the node-to-network loss sensitivity, and calculating the tie line variation according to the power generation and load variation and the node-to-branch sensitivity;
and the sharing module is used for calculating the system unbalance, taking the balance of the tie line as a target, and sharing the system unbalance to the power generation or load node.
As a further improvement of the present invention, the first calculating module is specifically configured to:
forecasting and reporting the plan and the forecast data to a regional power grid according to the requirements of the spot markets of each province on safety check dates, and superposing the plan and the forecast data on the basis of the historical operation section of the power grid by the regional power grid;
generating a check day power grid topological structure according to a topological structure of a historical operation section of a power grid and a start-up and shut-down plan, an equipment maintenance plan and a load switching plan of a generator set reported by each province on the check day;
and calculating the sensitivity of the power generation nodes and the load nodes to the system network loss and the sensitivity of the power generation nodes and the load nodes to the cross-provincial junctor according to the future topological structure of the power grid.
As a further improvement of the present invention, the second calculating module is specifically configured to:
calculating the active variable quantity of the power generation node and the load node, and adopting the following method:
Figure BDA0003385175770000051
/>
Figure BDA0003385175770000052
wherein i and j are node index numbers, m and n are the number of the power generation nodes and the load nodes respectively,
Figure BDA0003385175770000053
and &>
Figure BDA0003385175770000054
The power variation, delta P, of the ith power generation node and the jth load node respectively G And Δ P D The total power change amounts of the power generation node and the load node are respectively>
Figure BDA0003385175770000055
And &>
Figure BDA0003385175770000056
In the planning power of the ith generation node and the jth load node respectively, based on the comparison result>
Figure BDA0003385175770000057
And &>
Figure BDA0003385175770000058
Respectively the initial power of the ith power generation node and the jth load node;
calculating the system network loss variation by adopting the following method:
Figure BDA0003385175770000059
wherein Δ P loss As the amount of variation in the system network loss,
Figure BDA00033851757700000510
and &>
Figure BDA00033851757700000511
The sensitivity of the ith power generation node and the jth load node to the system network loss is respectively set;
and (3) calculating the link line variable quantity by adopting the following method:
Figure BDA00033851757700000512
wherein k is the index of the tie lines, N is the number of the tie lines,
Figure BDA0003385175770000061
is the change of the kth tie line>
Figure BDA0003385175770000062
For the sensitivity of the ith generation node to the kth tie,/>
Figure BDA0003385175770000063
sensitivity of the kth tie for the jth load node.
As a further improvement of the present invention, the apportioning module is specifically configured to:
the system unbalance equation is as follows:
ΔP＝ΔP D +ΔP loss -ΔP G
wherein, the delta P is the system unbalance amount and the generated energy required to be increased by the power generation node, and is selectively borne by an unplanned unit;
the variation of the unplanned unit needs to meet the following requirements:
Figure BDA0003385175770000064
wherein i is the node index of the unplanned unit in the m power generation nodes,
Figure BDA0003385175770000065
for the planned power of the kth tie line, <' > H>
Figure BDA0003385175770000066
Initial power for the kth link;
after adjustment, for the unplanned unit, the output is:
Figure BDA0003385175770000067
as a further improvement of the invention, the system further comprises a checking module which is used for recalculating the system unbalance amount delta P and the tie line variation
Figure BDA0003385175770000068
The following conditions need to be satisfied: />
Figure BDA0003385175770000069
And the system unbalance and the tie line variable quantity meet the requirements, and the load flow calculation is started to generate a future load flow section.
An electronic device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, the processor implementing the steps of the regional power grid future power flow balancing method when executing the computer program.
A computer-readable storage medium, having stored thereon a computer program which, when being executed by a processor, carries out the steps of the method for future power flow power balancing of a regional power grid.
Compared with the prior art, the invention has the beneficial effects that:
the method comprises the following three steps of calculating the sensitivity of a future power grid, calculating the system network loss variable quantity and the connecting line variable quantity, and distributing unbalanced power, the plan and the prediction data reported by each province are obtained, the system network loss is calculated through the sensitivity of the network loss to the nodes on the basis of the similar daily operation section of the regional power grid, so that the balance of each province power grid is realized, the balance of the cross-province connecting line is realized through the sensitivity of the branch to the nodes, the number of times of flow balance iteration can be effectively reduced, and the accuracy of flow calculation is improved. The invention provides a method for checking future power balance of a tidal current section by regional power grid security, which calculates system loss variation and tie line power variation through sensitivity, mainly solves the problem of mutual coordination of system power balance and trans-provincial tie line power balance, reduces iteration times of tidal current and improves the calculation accuracy of the tidal current.
Drawings
FIG. 1 is a schematic flow chart of a method for balancing future tidal current power of a regional power grid according to the present invention;
FIG. 2 is a schematic flow chart of a method for balancing future tidal current power of a regional power grid according to a preferred embodiment of the present invention;
FIG. 3 is a schematic diagram of a future tidal current power balancing system of a regional power grid according to the present invention;
fig. 4 is a schematic structural diagram of an electronic device according to the present invention.
Detailed Description
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
The following detailed description is exemplary in nature and is intended to provide further explanation of the invention as claimed. Unless otherwise defined, all technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention.
Interpretation of related terms
Three-level scheduling: a national power regulation center, a regional regulation center and a provincial regulation center;
two-stage market: provincial spot market, provincial spot market;
future trend: generating a future power grid operation state by considering future planning and prediction data on the basis of the historical section;
network loss: the power is transmitted from the power generation end to the power utilization end, and the power is lost;
node-to-network loss sensitivity: increasing the power of a power generation or load node by 1 unit power and the variation of network loss;
node to branch sensitivity: the power of the power generation or load node is increased by 1 unit power, and the variation of the branch power is reduced.
As shown in fig. 1, the present invention provides a method for balancing future power flow of a regional power grid, including the following steps:
firstly, acquiring plan and prediction data reported by each first area, generating a future topology of a power grid, and calculating node-to-branch sensitivity and node-to-network loss sensitivity;
secondly, calculating the system network loss variable quantity according to the power generation and load variable quantity and the node-to-network loss sensitivity, and calculating the tie line variable quantity according to the power generation and load variable quantity and the node-to-branch sensitivity;
and thirdly, calculating the system unbalance according to the system network loss variation and the tie line variation, taking the balance of the tie line as a target, and distributing the system unbalance to power generation or load nodes.
And finally, checking the power balance condition of the system and the power balance condition of the tie line.
The first area corresponds to the province and the second area corresponds to the cross-region.
Preferably, the plan and the prediction data reported by each first area are obtained, a future topology of the power grid is generated, and the node-to-branch sensitivity and the node-to-grid loss sensitivity are calculated; the method comprises the following steps:
forecasting and reporting the plan and the forecast data to a second regional power grid according to the requirements of the spot markets of the first regions on safety check dates, and overlapping the plan and the forecast data on the basis of the historical operation section of the power grid by the second regional power grid;
generating a check day power grid topological structure according to the topological structure of the historical operation section of the power grid and a start-up and shut-down plan, an equipment maintenance plan and a load switching plan of the generator set reported by each first area on the check day;
and calculating the sensitivity of the power generation nodes and the load nodes to the system loss and the sensitivity of the power generation nodes and the load nodes to the cross-first area tie line according to the future topological structure of the power grid.
Wherein the plan and forecast data includes cross-regional tie plan data, cross-first region tie plan data, and first region level power generation plan, load forecast, and service plan data.
According to the method, the system power and the tie line power are pre-balanced before the load flow calculation is started according to the node pair system network loss and the tie line sensitivity, so that the load flow iteration times can be effectively reduced, and meanwhile, the calculation accuracy and the result rationality are improved.
As shown in fig. 2, the method of the present invention specifically includes the following steps:
step (1): generating a future power grid topology according to the plan and the prediction data reported by each province, and calculating the sensitivity of the nodes to branch circuits/network loss; the method mainly comprises the following steps:
1-1, data processing. And reporting data such as a unit combination plan, a unit output plan, an overhaul plan, bus load prediction and the like to a regional power grid in the spot market of each province according to the safety check date requirement, and superposing the plan and the prediction data on the basis of the historical operation section of the power grid by the regional power grid.
1-2. Future topology generation. And generating a check day power grid topological structure according to the topological structure of the historical operation section of the power grid and a start-up and shut-down plan, an equipment maintenance plan and a load switching plan of the generator set reported by each province on the check day.
And 1-3, calculating the sensitivity. Calculating the sensitivity of the power generation nodes and the load nodes to the system network loss and the sensitivity of the power generation nodes and the load nodes to the trans-provincial junctor according to the future topological structure of the power grid;
step (2): calculating system network loss variation and tie line variation according to power generation load node power variation and sensitivity;
the step (2) of calculating the system network loss variation and the tie line variation comprises the following steps:
2-1, calculating the active variable quantity of the power generation node and the load node, and expressing the active variable quantity by using the following formula:
Figure BDA0003385175770000101
Figure BDA0003385175770000102
wherein i and j are node index numbers, m and n are the number of the power generation nodes and the load nodes respectively,
Figure BDA0003385175770000103
and &>
Figure BDA0003385175770000104
The power variation, delta P, of the ith power generation node and the jth load node respectively G And Δ P D The total power change amounts of the power generation node and the load node are respectively>
Figure BDA0003385175770000105
And &>
Figure BDA0003385175770000106
Planned powers for the ith generation node and the jth load node, respectively, are->
Figure BDA0003385175770000107
And &>
Figure BDA0003385175770000108
The initial power of the ith power generation node and the jth load node respectively.
2-2, calculating the system network loss variation, which is expressed by the following formula:
Figure BDA0003385175770000109
wherein Δ P loss As the amount of variation in the system network loss,
Figure BDA00033851757700001010
and &>
Figure BDA00033851757700001011
The sensitivity of the ith power generation node and the jth load node to the system network loss is respectively.
2-3, calculating the link variation, which is expressed by the following formula:
Figure BDA00033851757700001012
wherein k is the index of the tie line, N is the number of tie lines,
Figure BDA00033851757700001013
is the change of the kth tie line>
Figure BDA00033851757700001014
Sensitivity of the ith power generation node to the kth tie line, < >>
Figure BDA00033851757700001015
Sensitivity of the kth tie for the jth load node.
And (3): the balance of the tie lines is kept as a target, and the unbalance of the system is distributed to the nodes;
the strategy for apportioning the unbalanced power in the step (3) comprises the following specific steps:
3-1. System unbalance amount, expressed by the following formula:
ΔP＝ΔP D +ΔP loss -ΔP G
and the delta P is the system unbalance amount and the generated energy required to be increased by the power generation node, and is selectively borne by an unplanned unit.
3-2. The variation of the unplanned unit needs to meet the following requirements:
Figure BDA0003385175770000111
wherein i is the node index of the unplanned unit in the m power generation nodes,
Figure BDA0003385175770000112
for the planned power of the kth tie line>
Figure BDA0003385175770000113
Is the initial power of the k-th link.
After adjustment, for the unplanned unit, the output is:
Figure BDA0003385175770000114
3-3, returning to the step 3-2, recalculating the system unbalance amount delta P and the tie line variation
Figure BDA0003385175770000115
The following conditions need to be satisfied:
Figure BDA0003385175770000116
and 3-4, enabling the system unbalance amount and the tie line variable quantity to meet requirements, starting load flow calculation, and generating a future load flow section.
As shown in fig. 3, the present invention further provides a future power flow power balancing system for a regional power grid, including:
the first calculation module is used for acquiring plan and prediction data reported by each first area, generating a future topology of the power grid and calculating the sensitivity of the node to branch/network loss;
the second calculation module is used for calculating the system network loss variation according to the power generation and load variation and the node-to-network loss sensitivity, and calculating the tie line variation according to the power generation and load variation and the node-to-branch sensitivity;
and the sharing module is used for calculating the system unbalance, taking the balance of the tie line as a target, and sharing the system unbalance to the power generation or load node.
Wherein the first computing module is specifically configured to:
forecasting and reporting the plan and the forecast data to a second regional power grid according to the requirements of the spot markets of the first regions on safety check dates, and overlapping the plan and the forecast data on the basis of the historical operation section of the power grid by the second regional power grid;
generating a check day power grid topological structure according to the topological structure of the historical operation section of the power grid and a start-up and shut-down plan, an equipment maintenance plan and a load switching plan of the generator set reported by each first area on the check day;
and calculating the sensitivity of the power generation nodes and the load nodes to the system network loss and the sensitivity of the power generation nodes and the load nodes to the cross-first area tie line according to the future topological structure of the power grid.
Wherein the second calculation module is specifically configured to:
calculating the active variable quantity of the power generation node and the load node, and adopting the following method:
Figure BDA0003385175770000121
Figure BDA0003385175770000122
wherein i and j are node index numbers, m and n are the number of the power generation nodes and the load nodes respectively,
Figure BDA0003385175770000123
and &>
Figure BDA0003385175770000124
The power variation, delta P, of the ith power generation node and the jth load node respectively G And Δ P D The total power change amounts of the power generation node and the load node are respectively>
Figure BDA0003385175770000125
And &>
Figure BDA0003385175770000126
Planned powers for the ith generation node and the jth load node, respectively, are->
Figure BDA0003385175770000127
And &>
Figure BDA0003385175770000128
Respectively the initial power of the ith power generation node and the jth load node;
calculating the system network loss variation by adopting the following method:
Figure BDA0003385175770000129
wherein Δ P loss As the amount of variation in the system network loss,
Figure BDA00033851757700001210
and &>
Figure BDA00033851757700001211
The sensitivity of the ith power generation node and the jth load node to the system network loss is respectively set;
and (3) calculating the link line variable quantity by adopting the following method:
Figure BDA00033851757700001212
wherein k is the index of the tie line, N is the number of tie lines,
Figure BDA00033851757700001213
is the change of the kth tie line>
Figure BDA00033851757700001214
Sensitivity of the ith power generation node to the kth tie line, < >>
Figure BDA00033851757700001215
Sensitivity of the kth tie for the jth load node.
Wherein, the apportionment module is specifically configured to:
the method is characterized in that the balance of the tie lines is kept as a target, the unbalance of the system is distributed to the nodes, and the method comprises the following specific steps:
the system unbalance equation is as follows:
ΔP＝ΔP D +ΔP loss -ΔP G
wherein, the delta P is the system unbalance amount and the generated energy required to be increased by the power generation node, and is selectively borne by an unplanned unit;
the variation of the unplanned unit needs to meet the following requirements:
Figure BDA0003385175770000131
wherein i is the node index of the unplanned unit in the m power generation nodes,
Figure BDA0003385175770000132
for the planned power of the kth tie line, <' > H>
Figure BDA0003385175770000133
Initial power for the kth link;
after adjustment, for the unplanned unit, the output is:
Figure BDA0003385175770000134
the system further comprises a checking module used for recalculating the system unbalance amount delta P and the tie line variable quantity
Figure BDA0003385175770000135
The following conditions need to be satisfied:
Figure BDA0003385175770000136
and the system unbalance and the tie line variable quantity meet the requirements, and the load flow calculation is started to generate a future load flow section.
A third object of the present invention is to provide an electronic device, as shown in fig. 4, which includes a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the regional power grid future power flow balancing method when executing the computer program.
The method for balancing the future power flow power of the regional power grid comprises the following steps:
acquiring plan and prediction data reported by each first area, generating a future topology of the power grid, and calculating the sensitivity of the node to a branch and the sensitivity of the node to the loss;
calculating the system network loss variable quantity according to the power generation and load variable quantity and the node-to-network loss sensitivity, and calculating the tie line variable quantity according to the power generation and load variable quantity and the node-to-branch sensitivity;
and calculating the system unbalance according to the system network loss variation and the tie line variation, and distributing the system unbalance to power generation or load nodes by taking the tie line balance as a target.
It is a fourth object of the present invention to provide a computer readable storage medium, storing a computer program which, when executed by a processor, performs the steps of the power capacity market segment clearing method.
The method for balancing the future power flow power of the regional power grid comprises the following steps:
acquiring plan and prediction data reported by each first area, generating a future topology of the power grid, and calculating node-to-branch sensitivity and node-to-grid loss sensitivity;
calculating the system network loss variable quantity according to the power generation and load variable quantity and the node-to-network loss sensitivity, and calculating the tie line variable quantity according to the power generation and load variable quantity and the node-to-branch sensitivity;
and calculating the system unbalance according to the system network loss variation and the tie line variation, and distributing the system unbalance to power generation or load nodes by taking the tie line balance as a target.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims.

Claims (11)

1. A regional power grid future power flow power balancing method is characterized by comprising the following steps:
acquiring plan and prediction data reported by each first area, generating a future topology of the power grid, and calculating the sensitivity of the node to a branch and the sensitivity of the node to the loss;
calculating the system network loss variable quantity according to the power generation and load variable quantity and the node-to-network loss sensitivity, and calculating the tie line variable quantity according to the power generation and load variable quantity and the node-to-branch sensitivity;
calculating the system unbalance amount according to the system network loss variation and the tie line variation, and distributing the system unbalance amount to power generation or load nodes by taking the tie line balance as a target;
according to electricity generation and load variation and node pair net loss sensitivity, calculation system net loss variation, according to electricity generation and load variation and node pair branch sensitivity, calculate the tie line variation, including following step:
calculating the active variable quantity of the power generation node and the load node, and adopting the following method:
Figure FDA0004015598550000011
Figure FDA0004015598550000012
wherein i and j are node index numbers, m and n are the number of the power generation nodes and the load nodes respectively,
Figure FDA0004015598550000013
and
Figure FDA0004015598550000014
the power variation, delta P, of the ith power generation node and the jth load node respectively G And Δ P D The total power variation of the power generation node and the load node respectively,
Figure FDA0004015598550000015
and
Figure FDA0004015598550000016
the planned power for the ith power generation node and the jth load node respectively,
Figure FDA0004015598550000017
and
Figure FDA0004015598550000018
respectively the initial power of the ith power generation node and the jth load node;
calculating the system network loss variation by adopting the following method:
Figure FDA0004015598550000019
wherein Δ P loss As the amount of variation in the system network loss,
Figure FDA00040155985500000110
and
Figure FDA00040155985500000111
the sensitivity of the ith power generation node and the jth load node to the system network loss is respectively set;
and (3) calculating the link line variable quantity by adopting the following method:
Figure FDA0004015598550000021
wherein k is the index of the tie lines, N is the number of the tie lines,
Figure FDA0004015598550000022
is the amount of change in the k-th tie,
Figure FDA0004015598550000023
for the sensitivity of the ith generation node to the kth tie,
Figure FDA0004015598550000024
sensitivity of the kth tie for the jth load node.
2. The method of claim 1,
acquiring plan and prediction data reported by each first area, generating a future topology of the power grid, and calculating the sensitivity of the node to a branch and the sensitivity of the node to the loss; the method comprises the following steps:
forecasting and reporting the plan and the forecast data to a second regional power grid according to the requirements of the spot markets of the first regions on safety check dates, and overlapping the plan and the forecast data on the basis of the historical operation section of the power grid by the second regional power grid;
generating a check day power grid topological structure according to the topological structure of the historical operation section of the power grid and a start-up and shut-down plan, an equipment maintenance plan and a load switching plan of the generator set reported by each first area on the check day;
and calculating the sensitivity of the power generation nodes and the load nodes to the system loss and the sensitivity of the power generation nodes and the load nodes to the cross-first area tie line according to the future topological structure of the power grid.
3. The method of claim 1,
the planning and forecasting data includes cross-regional tie line planning data, cross-first region tie line planning data, and first region level power generation planning, load forecasting, and overhaul planning data.
4. The method of claim 1,
the method is characterized in that the balance of the tie lines is kept as a target, the unbalance of the system is distributed to the nodes, and the method comprises the following specific steps:
the system unbalance equation is as follows:
ΔP＝ΔP D +ΔP loss -ΔP G
wherein, the delta P is the system unbalance amount and the generated energy required to be increased by the power generation node, and is selectively borne by an unplanned unit;
the variation of the unplanned unit needs to meet the following requirements:
Figure FDA0004015598550000031
wherein i is the node index of the unplanned unit in the m power generation nodes,
Figure FDA0004015598550000032
for the planned power of the k-th link,
Figure FDA0004015598550000033
initial power for the kth link;
after adjustment, the output for the unplanned unit is as follows:
Figure FDA0004015598550000034
5. the method of claim 4,
after the system unbalance is distributed to the power generation or load nodes, the method further comprises the following steps:
the checking of the power balance condition and the tie line power balance condition specifically includes:
returning to recalculate the system unbalance amount delta P and the tie line variation
Figure FDA0004015598550000035
The following conditions need to be satisfied:
Figure FDA0004015598550000036
and if the system unbalance and the tie line variable quantity meet the requirements, starting load flow calculation to generate a future load flow section.
6. A regional power grid future power flow power balancing system, comprising:
the first calculation module is used for acquiring plan and prediction data reported by each first area, generating a future topology of the power grid, and calculating the sensitivity of the node to a branch and the sensitivity of the node to a loss;
the second calculation module is used for calculating the system network loss variation according to the power generation and load variation and the node-to-network loss sensitivity, and calculating the tie line variation according to the power generation and load variation and the node-to-branch sensitivity;
the sharing module is used for calculating the system unbalance amount according to the system network loss variation and the tie line variation, aiming at keeping the tie line balance and sharing the system unbalance amount to a power generation or load node;
the second calculation module is specifically configured to:
calculating the active variable quantity of the power generation node and the load node, and adopting the following method:
Figure FDA0004015598550000041
Figure FDA0004015598550000042
wherein i and j are node index numbers, m and n are the number of the power generation nodes and the load nodes respectively,
Figure FDA0004015598550000043
and
Figure FDA0004015598550000044
the power variation, delta P, of the ith power generation node and the jth load node respectively G And Δ P D The total power variation of the power generation node and the load node respectively,
Figure FDA0004015598550000045
and
Figure FDA0004015598550000046
the planned power for the ith power generation node and the jth load node respectively,
Figure FDA0004015598550000047
and
Figure FDA0004015598550000048
respectively the initial power of the ith power generation node and the jth load node;
calculating the system network loss variation by adopting the following method:
Figure FDA0004015598550000049
wherein Δ P loss As the amount of variation in the system network loss,
Figure FDA00040155985500000410
and
Figure FDA00040155985500000411
the sensitivity of the ith power generation node and the jth load node to the system network loss is respectively set;
and (3) calculating the link line variable quantity by adopting the following method:
Figure FDA00040155985500000412
wherein k is the index of the tie lines, N is the number of the tie lines,
Figure FDA00040155985500000413
is the amount of change in the k-th tie,
Figure FDA00040155985500000414
for the sensitivity of the ith generation node to the kth tie,
Figure FDA00040155985500000415
sensitivity of the kth tie for the jth load node.
7. The system of claim 6,
the first calculation module is specifically configured to:
forecasting and reporting the plan and the forecast data to a second regional power grid according to the requirements of the spot markets of the first regions on safety check dates, and overlapping the plan and the forecast data on the basis of the historical operation section of the power grid by the second regional power grid;
generating a check day power grid topological structure according to the topological structure of the historical operation section of the power grid and a start-up and shut-down plan, an equipment maintenance plan and a load switching plan of the generator set reported by each first area on the check day;
and calculating the sensitivity of the power generation nodes and the load nodes to the system network loss and the sensitivity of the power generation nodes and the load nodes to the cross-first area tie line according to the future topological structure of the power grid.
8. The system of claim 6,
the apportionment module is specifically configured to:
the system unbalance equation is as follows:
ΔP＝ΔP D +ΔP loss -ΔP G
wherein, the delta P is the system unbalance amount and the generated energy required to be increased by the power generation node, and is selectively borne by an unplanned unit;
the variation of the unplanned unit needs to meet the following requirements:
Figure FDA0004015598550000051
wherein i is the node index of the unplanned unit in the m power generation nodes,
Figure FDA0004015598550000052
for the planned power of the kth link,
Figure FDA0004015598550000053
initial power for the kth link;
after adjustment, for the unplanned unit, the output is:
Figure FDA0004015598550000054
9. the system of claim 8,
the system further comprises a checking module used for recalculating the system unbalance amount delta P and the tie line variable quantity
Figure FDA0004015598550000055
The following conditions need to be satisfied:
Figure FDA0004015598550000056
and the system unbalance and the tie line variable quantity meet the requirements, and the load flow calculation is started to generate a future load flow section.
10. An electronic device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, the processor implementing the steps of the regional power grid future power flow balancing method according to any one of claims 1 to 5 when executing the computer program.
11. A computer readable storage medium storing a computer program which, when executed by a processor, implements the steps of the regional power grid future power flow power balancing method of any of claims 1-5.
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