CN110458334B - Auxiliary decision-making method for limiting short-circuit current operation mode - Google Patents
Auxiliary decision-making method for limiting short-circuit current operation mode Download PDFInfo
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- CN110458334B CN110458334B CN201910659442.XA CN201910659442A CN110458334B CN 110458334 B CN110458334 B CN 110458334B CN 201910659442 A CN201910659442 A CN 201910659442A CN 110458334 B CN110458334 B CN 110458334B
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Abstract
The invention discloses an auxiliary decision-making method for limiting a short-circuit current operation mode, which is characterized in that load flow calculation data of a day-ahead planning mode is formed and load flow calculation is carried out on the basis of a day-ahead power generation plan, load prediction, maintenance plan data and reactive voltage data of similar operation days; calculating the short-circuit current of each bus and each line in the system based on the load flow calculation data and the calculation result; if buses and lines with short-circuit current exceeding rated breaking capacity of a short-circuit device exist, performing auxiliary decision calculation, and if not, ending the method; considering various measures and comprehensive aid decision of a plurality of short-circuit current out-of-limit buses and lines and forming an operation mode adjustment strategy; and (4) performing safety and stability check on the adjusted operation mode, if the safety and stability requirements can be met, obtaining an adjustment strategy, and if not, directly ending the method. The advantages are that: the short-circuit current level can be effectively reduced, the safety margin and the power supply reliability of a power grid are enhanced, and the safety and economic operation level of the power grid is effectively improved.
Description
Technical Field
The invention relates to an auxiliary decision-making method for limiting a short-circuit current operation mode, and belongs to the technical field of power system automation.
Background
Along with the continuous expansion of the scale of the power grid, the tightness degree of the connection between the power grids is enhanced, the short-circuit current of the receiving-end power grid generally approaches or even exceeds the maximum breaking capacity of a circuit breaker, and measures of breaking and tripping the circuit for a long time are forced to be taken, the structural integrity of the main grid is continuously weakened, the regulation and control of an important power transmission section are difficult, and the power supply capacity and the section power transmission capacity of the main grid are restricted.
At present, when a power grid operator arranges an operation mode, the short-circuit current of each point is checked according to the maximum short-circuit current calculation principle, and when the short-circuit current is found to exceed the standard, a scheme for limiting the short-circuit current is provided. According to the scheme, the maximum possible short-circuit current is calculated according to the worst mode, the adopted short-circuit current limiting measures are too conservative, and the safety margin of power grid operation and the power supply reliability are reduced.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide an auxiliary decision method for limiting the short-circuit current operation mode, which is characterized in that calculation data are formed based on a day-ahead scheduling plan mode to carry out short-circuit current calculation and auxiliary decision calculation, a plurality of short-circuit current out-of-limit buses and various measures are comprehensively and coordinately considered to obtain an auxiliary decision of the operation mode, the short-circuit current level can be effectively reduced, the safety margin and the power supply reliability of a power grid are enhanced, and the safety and economic operation level of the power grid is effectively improved.
In order to solve the above technical problem, the present invention provides an assistant decision method for limiting a short-circuit current operation mode, comprising the following steps:
step 1: forming flow calculation data in a day-ahead planning mode based on a day-ahead power generation plan, load prediction, maintenance plan data and reactive voltage data of similar operation days, and performing flow calculation;
step 2: forming calculation data of short-circuit current calculation and auxiliary decision calculation based on the current calculation data of the day-ahead planning mode, and calculating the short-circuit current of each bus and each line in the system based on the calculation data and the current calculation result;
and step 3: if buses and lines with short-circuit current exceeding the rated breaking capacity of the short-circuit device exist, the method goes to step 4 to carry out auxiliary decision calculation, and if not, the method is ended;
and 4, step 4: calculating the short-circuit current sensitivity of the commissioning serial high resistance, the outage line, the outage generator, the bus split operation and the line out-of-string operation control measures to the out-of-limit buses and lines, and performing comprehensive auxiliary decision taking various measures and a plurality of short-circuit current out-of-limit buses and lines into consideration based on the sensitivity to form an operation mode adjustment strategy;
and 5: and (4) performing safety and stability check on the adjusted operation mode, outputting an operation mode adjustment strategy if the safety and stability requirements can be met, and otherwise, directly ending the method.
Further, the step 1 specifically includes:
and forming current calculation data in a day-ahead 96-point planning mode based on the day-ahead power generation plan, load prediction, maintenance plan data and reactive voltage data of similar operation days, and performing current calculation.
Further, the method for forming the calculation data of the short-circuit current calculation and the decision-making assisting calculation in the step 2 is as follows:
and selecting the mode with the largest load from day-ahead 96-point planning modes as a basic mode, and putting all the equipment which is not put into operation in the basic mode in the maintenance plan operation equipment into operation so as to form load flow calculation data as calculation data for short-circuit current calculation and assistant decision calculation.
Further, the method for calculating the short-circuit current of each bus and each line in the system based on the calculation data in the step 2 is as follows:
and adopting a short-circuit current calculation method not based on the power flow, wherein the voltage of the voltage source is the maximum value of the bus voltage in the power flow calculation result in a day-ahead 96-point planning mode.
Further, the comprehensive assistant decision method considering multiple types of measures and multiple short-circuit current out-of-limit buses and lines in the step 4 is as follows:
screening control measures with short-circuit current sensitivity larger than a threshold value for the out-of-limit buses and lines as effective control measures for the out-of-limit buses and the lines, sequencing the effective control measures according to a priority defined in advance, sequencing the short-circuit current sensitivity in the same priority to obtain an effective control measure queue of each out-of-limit bus and line, sequentially adding the control measures according to the sequence of the control queue, and obtaining a control scheme set of the out-of-limit buses and lines;
performing enumeration combination of control schemes among control scheme sets of each out-of-limit bus and each line to obtain a comprehensive decision-making auxiliary control scheme set considering multiple types of measures and a plurality of short-circuit current out-of-limit buses and lines, performing short-circuit current calculation on all the control schemes in the set in parallel by using a cluster calculation platform to obtain short-circuit current calculation results under each control scheme, and selecting a calculation result which meets the requirement of the breaking capacity of all short-circuit devices and has the minimum control cost from all the calculation results, wherein the control scheme corresponding to the result is an operation mode adjustment strategy.
Further, the safety and stability check adopts static and transient safety and stability check.
The invention has the following beneficial effects:
calculation data are formed based on a day-ahead scheduling plan mode to carry out short-circuit current calculation and decision-making assistance calculation, advanced decision can be carried out by considering the change of a future operation mode, and frequent adjustment of actual scheduling operation is avoided; a conservative principle is considered on the calculation data generation and short-circuit current calculation method, and the availability of a calculation result is ensured; the comprehensive coordination aid decision making of various measures and a plurality of short-circuit current out-of-limit buses is considered, so that the practicability of the calculation result is improved; the auxiliary decision-making method for limiting the short-circuit current operation mode can effectively reduce the short-circuit current level, enhance the safety margin and the power supply reliability of a power grid and effectively improve the safety and economic operation level of the power grid.
Drawings
Fig. 1 is a flow chart of an auxiliary decision method for limiting a short-circuit current operation mode.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1, an assistant decision method for limiting a short-circuit current operation mode includes the following steps:
step 1: forming current calculation data in a day-ahead 96-point planning mode based on a day-ahead power generation plan, load prediction, maintenance plan data and reactive voltage data of similar operation days, and performing current calculation;
and 2, step: forming calculation data of short-circuit current calculation and auxiliary decision calculation based on the current calculation data of the day-ahead planning mode, and calculating the short-circuit current of each bus and each line in the system based on the calculation data;
and step 3: if buses and lines with short-circuit current exceeding the rated breaking capacity of the short-circuit device exist, the method goes to step 4 to carry out auxiliary decision calculation, and if not, the method is ended;
and 4, step 4: calculating the short-circuit current sensitivity of the commissioning serial high resistance, the outage line, the outage generator, the bus split operation and the line out-of-string operation control measures to the out-of-limit buses and lines, and performing comprehensive auxiliary decision taking various measures and a plurality of short-circuit current out-of-limit buses and lines into consideration based on the sensitivity to form an operation mode adjustment strategy;
and 5: and performing static and transient safety and stability checking on the adjusted operation mode, outputting an operation mode adjustment strategy if the safety and stability requirements can be met, and otherwise, directly ending the method.
In this embodiment, the method for forming the calculation data of the short-circuit current calculation and the decision-making assisting calculation in step 2 is as follows:
and selecting the mode with the largest load from day-ahead 96-point planning modes as a basic mode, and putting all the equipment which is not put into operation in the basic mode in the maintenance plan operation equipment into operation so as to form load flow calculation data as calculation data for short-circuit current calculation and assistant decision calculation.
In this embodiment, the method for calculating the short-circuit current of each bus and line in the system based on the calculation data in step 2 is as follows:
and adopting a short-circuit current calculation method not based on the power flow, wherein the voltage of the voltage source is the maximum value of the bus voltage in the power flow calculation result in a day-ahead 96-point planning mode.
In this embodiment, the comprehensive assistant decision method considering multiple types of measures and multiple short-circuit current out-of-limit buses and lines in step 4 is as follows:
screening control measures with short-circuit current sensitivity larger than a threshold value for the out-of-limit buses and the lines as effective control measures for the out-of-limit buses and the lines, sequencing the effective control measures according to a priority defined in advance, sequencing the short-circuit current sensitivity in the same priority to obtain an effective control measure queue of each out-of-limit bus and line, sequentially adding the control measures according to the sequence of the control queue, and obtaining a control scheme set of the out-of-limit buses and the lines.
Performing enumeration combination of control schemes among control scheme sets of each out-of-limit bus and each line to obtain a comprehensive decision-making auxiliary control scheme set considering multiple types of measures and a plurality of short-circuit current out-of-limit buses and lines, performing short-circuit current calculation on all the control schemes in the set in parallel by using a cluster calculation platform to obtain short-circuit current calculation results under each control scheme, and selecting a calculation result which meets the requirements of the breaking capacity of all short-circuit devices and has the minimum control cost from all the calculation results, wherein the control scheme corresponding to the result is the operation mode adjustment strategy to be solved.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, it is possible to make various improvements and modifications without departing from the technical principle of the present invention, and those improvements and modifications should be considered as the protection scope of the present invention.
Claims (6)
1. An auxiliary decision-making method for limiting a short-circuit current operation mode is characterized by comprising the following steps:
step 1: forming flow calculation data in a day-ahead planning mode based on a day-ahead power generation plan, load prediction, maintenance plan data and reactive voltage data of similar operation days, and performing flow calculation;
step 2: forming calculation data of short-circuit current calculation and auxiliary decision calculation based on the current calculation data of the day-ahead planning mode, and calculating the short-circuit current of each bus and each line in the system based on the calculation data and the current calculation result;
and step 3: if buses and lines with short-circuit current exceeding the rated breaking capacity of the short-circuit device exist, the step 4 is carried out to carry out auxiliary decision calculation, and if not, the method is ended;
and 4, step 4: calculating the short-circuit current sensitivity of the operation series high-resistance, outage line, outage generator, bus split operation and line out-of-series operation control measures to the out-of-limit buses and lines, carrying out comprehensive auxiliary decision considering various measures and a plurality of short-circuit current out-of-limit buses and lines based on the sensitivity, and forming an operation mode adjustment strategy;
and 5: and (4) performing safety and stability checking on the adjusted operation mode, outputting an operation mode adjustment strategy if the safety and stability requirements can be met, and otherwise, directly ending the method.
2. The method for assisting in decision-making for short-circuit current limiting operation mode according to claim 1, wherein the step 1 specifically comprises:
and forming current calculation data in a day-ahead 96-point planning mode based on the day-ahead power generation plan, load prediction, maintenance plan data and reactive voltage data of similar operation days, and performing current calculation.
3. The method for assisting in decision making for short circuit current limiting operation mode according to claim 1, wherein the calculation data method for forming the short circuit current calculation and the assistant decision calculation in step 2 is as follows:
and selecting a mode with the largest load from day-ahead 96-point planning modes as a basic mode, and putting all the equipment which is not put into operation in the basic mode in the maintenance plan operation equipment into operation so as to form load flow calculation data as calculation data for short-circuit current calculation and assistant decision calculation.
4. The method for assisting in decision-making of short-circuit current limiting operation mode according to claim 1, wherein the method for calculating the short-circuit current of each bus and each line in the system based on the calculation data in the step 2 is as follows:
and adopting a short-circuit current calculation method not based on the power flow, wherein the voltage of the voltage source is the maximum value of the bus voltage in the power flow calculation result in a day-ahead 96-point planning mode.
5. The method for assisting in decision-making for short-circuit current limiting operation mode according to claim 1, wherein the comprehensive assistant decision-making method considering multiple types of measures and multiple short-circuit current out-of-limit buses and lines in step 4 is as follows:
screening control measures with the short-circuit current sensitivity of the out-of-limit buses and the lines larger than a threshold value as effective control measures of the out-of-limit buses and the lines, sequencing the effective control measures according to priorities defined in advance, sequencing the short-circuit current sensitivity inside the same priority to obtain effective control measure queues of all the out-of-limit buses and the lines, sequentially adding the control measures according to the sequence of the control measures queues to obtain a control scheme set of the out-of-limit buses and the lines;
performing enumeration combination of control schemes among control scheme sets of each out-of-limit bus and each line to obtain a comprehensive decision-making auxiliary control scheme set considering multiple types of measures and a plurality of short-circuit current out-of-limit buses and lines, performing short-circuit current calculation on all the control schemes in the set in parallel by using a cluster calculation platform to obtain short-circuit current calculation results under each control scheme, and selecting a calculation result which meets the requirement of the breaking capacity of all short-circuit devices and has the minimum control cost from all the calculation results, wherein the control scheme corresponding to the result is an operation mode adjustment strategy.
6. The method of claim 1, wherein the safety and stability check is static and transient safety and stability check.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6549880B1 (en) * | 1999-09-15 | 2003-04-15 | Mcgraw Edison Company | Reliability of electrical distribution networks |
| WO2013139392A1 (en) * | 2012-03-21 | 2013-09-26 | Abb Technology Ltd | Switching system for a dc grid |
| CN104362678A (en) * | 2014-11-21 | 2015-02-18 | 国家电网公司 | Method for analyzing counter measures on influences of connection of wind power plant on partial electric network |
| CN104410065A (en) * | 2014-10-31 | 2015-03-11 | 广东电网有限责任公司电力调度控制中心 | Multi-target decision method for limiting short circuit currents in receiving-end electrical network |
-
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6549880B1 (en) * | 1999-09-15 | 2003-04-15 | Mcgraw Edison Company | Reliability of electrical distribution networks |
| WO2013139392A1 (en) * | 2012-03-21 | 2013-09-26 | Abb Technology Ltd | Switching system for a dc grid |
| CN104410065A (en) * | 2014-10-31 | 2015-03-11 | 广东电网有限责任公司电力调度控制中心 | Multi-target decision method for limiting short circuit currents in receiving-end electrical network |
| CN104362678A (en) * | 2014-11-21 | 2015-02-18 | 国家电网公司 | Method for analyzing counter measures on influences of connection of wind power plant on partial electric network |
Non-Patent Citations (1)
| Title |
|---|
| 基于灵敏度分析的限流方案优化决策方法;杨冬 等;《电力自动化设备》;20151231;第111-118段 * |
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