CN110492486B - 10kV bus voltage optimization method, system and medium capable of improving power distribution network voltage qualification rate - Google Patents
10kV bus voltage optimization method, system and medium capable of improving power distribution network voltage qualification rate Download PDFInfo
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Abstract
The invention discloses a 10kV bus voltage optimization method, a system and a medium capable of improving the voltage qualification rate of a power distribution network, wherein the optimization steps comprise the steps of determining the calculation reference day of a target 10kV bus; respectively counting and calculating the normal, overvoltage and undervoltage occupation ratios of the transformer area voltage in the reference day power supply area; determining the distribution network voltage condition in the target 10kV bus power supply range according to the normal, overvoltage and undervoltage ratios; and calculating the periodic target 10kV bus voltage target value according to the generation cost of the distribution network voltage condition within the target 10kV bus power supply range. According to the invention, the purpose of increasing the voltage qualification rate of the power distribution network can be achieved by optimizing the 10kV bus voltage, the voltage qualification rate of the 10kV bus is not reduced, the voltage qualification rate of the power distribution network is also improved, the reactive resources of a main power grid of 10kV or more are fully utilized, and the voltage regulation and control cost of the power distribution network is reduced.
Description
Technical Field
The invention relates to a 10kV bus voltage control target value optimization technology, in particular to a 10kV bus voltage optimization method, a system and a medium capable of improving the voltage qualification rate of a power distribution network, and the method, the system and the medium can be used for improving the voltage qualification rate of a 400V power grid on the low-voltage side of a power distribution transformer.
Background
With the closer connection between production and life of people and electricity, the requirement on the quality of electric energy is increasingly increased. The voltage amplitude is the most basic power quality index. Whether the voltage amplitude is in a qualified range directly influences daily production and life. The voltage qualification rate is the percentage of the total time sum of the voltage of the monitoring point in the qualification range and the total time of voltage monitoring in the calculation period in the operation of the power grid, and is an important index for representing whether the voltage amplitude is in the qualification range. Therefore, increasing the grid voltage yield, especially the distribution network voltage yield including the users, is one of the most important works at present.
The existing method for improving the voltage qualification rate of a power distribution network generally adopts a method of gear shifting of a distribution transformer and switching of reactive compensation equipment in a transformer area. Because the reactive power resources of the power distribution network are limited and the regulation and control means are single, the existing method has no worry in the aspect of improving the voltage qualification rate. Meanwhile, the reactive power resources of the main power grid of 10kV or more are relatively more, and the regulation and control means are also more. Therefore, the utilization of the reactive power resources of the main power grid is considered, and the voltage qualification rate of the power distribution network is improved. The voltage of the main grid 10kV bus directly influences the voltage of the distribution network. If the voltage of the 10kV bus can be optimized according to the requirement of the power distribution network, the purpose of improving the voltage qualification rate of the power distribution network by using the reactive power resources of the main power grid can be realized. And at present, a 10kV bus voltage optimization strategy and system aiming at improving the voltage qualification rate of the power distribution network are lacked. Therefore, a 10kV bus voltage optimization strategy and system are needed to improve the power distribution network voltage qualification rate.
The existing methods related to increasing the qualified rate of the voltage of the power distribution network and optimizing the voltage of the 10kV bus are not few, but the method for increasing the qualified rate of the voltage of the power distribution network by optimizing the voltage of the 10kV bus is basically not available. For example, the chinese patent document with application number 201611013425.1 discloses an analysis method and system for a power distribution network low voltage treatment scheme, which treats the problem of power distribution network low voltage by using basic data, but does not relate to optimizing 10kV bus voltage; the chinese patent document with application number 201410375266.4 discloses a system and a method for analyzing the qualification rate of 10kV bus voltage of a power system, which only relates to the improvement of the qualification rate of 10kV self voltage, but does not relate to the improvement of the qualification rate of distribution network voltage. Therefore, how to realize the optimization of the 10kV bus voltage with the goal of increasing the power distribution network voltage yield becomes a key technical problem to be solved urgently.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: aiming at the problems in the prior art, the invention provides a 10kV bus voltage optimization method, a system and a medium capable of improving the voltage qualification rate of a power distribution network.
In order to solve the technical problems, the invention adopts the technical scheme that:
a10 kV bus voltage optimization method capable of improving the voltage qualification rate of a power distribution network comprises the following implementation steps:
1) determining a calculation reference day of a target 10kV bus;
2) respectively counting and calculating the normal, overvoltage and undervoltage occupation ratios of the transformer area voltage in the reference day power supply area;
3) determining the distribution network voltage condition in the target 10kV bus power supply range according to the normal, overvoltage and undervoltage ratios;
4) and calculating the periodic target 10kV bus voltage target value according to the generation cost of the distribution network voltage condition within the target 10kV bus power supply range.
Optionally, the detailed steps of step 1) include:
1.1) acquiring a topological relation between a target 10kV bus and a line from a dispatching master station, acquiring the current condition of a 10kV line hanging transformer area from a power distribution operation and detection system, and acquiring the voltage and electric quantity of each transformer area of the current 10kV line from a marketing electricity acquisition system;
1.2) determining a target 10kV bus power supply area in the calculation period according to the topological relation between the target 10kV bus and the line and the current 10kV line hanging area condition;
1.3) comparing the target 10kV bus power supply area of the calculation period with the target 10kV bus power supply area of the previous calculation period, if the target 10kV bus power supply area is unchanged, selecting the maximum load day in the calculation period of the target 10kV bus power supply area as a calculation reference day, and otherwise, selecting the day for acquiring topological relation and hanging condition data as the calculation reference day.
Optionally, the detailed steps of step 2) include:
2.1) rejecting voltage points lower than a first threshold voltage from all voltage points according to the power supply region intra-area voltage in a reference day, and taking the number of the remaining voltage points as the number of statistical voltage points;
2.2) in the rest voltage points, taking the voltage point smaller than the second threshold voltage as an under-voltage point, the voltage point larger than the third threshold voltage as an over-voltage point, taking the voltage point between the second threshold voltage and the third threshold voltage as a normal point, taking the ratio of the number of the under-voltage points to the number of the statistical voltage points as an under-voltage ratio, taking the ratio of the number of the over-voltage points to the number of the statistical voltage points as an over-voltage ratio, and taking the ratio of the number of the normal points to the number of the statistical voltage points as a normal ratio.
Optionally, the detailed steps of step 3) include:
3.1) judging whether the normal occupation ratio is more than or equal to the overvoltage occupation ratio and the undervoltage occupation ratio is less than the preset ratio, if so, judging that the voltage of the distribution network in the power supply range of the target 10kV bus is normal, and skipping to execute the step 4); otherwise, skipping to execute the next step;
3.2) judging whether the normal occupation ratio is smaller than the overvoltage occupation ratio and the undervoltage occupation ratio is smaller than a preset ratio, if so, judging that the voltage of the distribution network in the power supply range of the target 10kV bus is higher, and skipping to execute the step 4); otherwise, skipping to execute the next step;
3.3) judging whether the normal occupation ratio is larger than or equal to the overvoltage occupation ratio and the undervoltage occupation ratio is larger than or equal to a preset ratio, and if so, judging that the voltage of a distribution network in the power supply range of the target 10kV bus is low; jump execution step 4).
Optionally, the detailed steps of step 4) include:
4.1) judging the voltage condition of the distribution network within the power supply range of the target 10kV bus, and if the voltage of the distribution network within the power supply range of the target 10kV bus is normal, skipping to execute the step 4.2); if the distribution network voltage in the target 10kV bus power supply range is higher, skipping to execute the step 4.3); if the distribution network voltage in the target 10kV bus power supply range is low, skipping to execute the step 4.4); otherwise, skipping to execute the step 4.5);
4.2) judging that the target 10kV bus voltage does not need to be optimized, setting the value of the target 10kV bus voltage target value of the calculation period as the target 10kV bus voltage target value of the previous calculation period, ending and exiting;
4.3) judging whether the sum of the target value of the 10kV bus voltage of the target of the previous calculation period, which is greater than or equal to the lower limit of the 10kV bus voltage, and the preset unit optimization value is established or not, if so, setting the target value of the 10kV bus voltage of the target of the calculation period as a difference value obtained by subtracting the preset unit optimization value from the target value of the 10kV bus voltage of the target of the previous calculation period, ending and exiting; otherwise, skipping to execute the step 4.5);
4.4) judging whether the difference value obtained by subtracting the preset unit optimization value from the upper limit of the 10kV bus voltage of the target 10kV bus voltage in the last calculation period is true, if true, setting the value of the target 10kV bus voltage in the calculation period as the sum of the target 10kV bus voltage in the last calculation period and the preset unit optimization value, ending and exiting; otherwise, skipping to execute the step 4.5);
4.5) judging that the target 10kV bus voltage cannot be optimized, setting the value of the target 10kV bus voltage target value of the calculation period as the target 10kV bus voltage target value of the previous calculation period, ending and exiting.
In addition, the invention also provides a 10kV bus voltage optimization method capable of improving the voltage qualification rate of the power distribution network, which comprises the following implementation steps:
s1) determining all 10kV buses in the power distribution network;
s2) traversing and selecting one 10kV bus from all 10kV buses as a target 10kV bus;
s3) obtaining the target value of the 10kV bus voltage of the calculation period target by adopting the 10kV bus voltage optimization method capable of improving the voltage qualification rate of the power distribution network; if other 10kV buses which are operated in parallel with the target 10kV bus exist in all the 10kV buses, the voltage target value of the target 10kV bus in the calculation period is also used as the voltage target value of other 10kV buses in the calculation period, and the other 10kV buses are regarded as being traversed;
s4) judging whether all the 10kV buses are completely traversed, and if not, skipping to execute the step S2); otherwise, judging that all 10kV buses in the calculation period are completely optimized.
In addition, the invention also provides a 10kV bus voltage optimization system capable of improving the voltage qualification rate of a power distribution network, which comprises:
the calculation reference day determining program unit is used for determining the calculation reference day of the target 10kV bus;
the distribution area voltage classification ratio calculation program unit is used for respectively counting and calculating the normal, overvoltage and undervoltage ratios of the distribution area voltage in the power supply area in the reference day;
the distribution network voltage condition classification program unit is used for determining the distribution network voltage condition in the target 10kV bus power supply range according to the normal, overvoltage and undervoltage occupation ratios;
and the voltage target value calculation program unit is used for calculating the periodic target 10kV bus voltage target value according to the generation cost of the distribution network voltage condition within the target 10kV bus power supply range.
In addition, the invention also provides a 10kV bus voltage optimization system capable of improving the power distribution network voltage qualification rate, which comprises a computer device, wherein the computer device is programmed or configured to execute the steps of the 10kV bus voltage optimization method capable of improving the power distribution network voltage qualification rate, or a storage medium of the computer device is stored with a computer program which is programmed or configured to execute the 10kV bus voltage optimization method capable of improving the power distribution network voltage qualification rate.
In addition, the invention also provides a 10kV bus voltage optimization system capable of improving the voltage qualification rate of the power distribution network, which comprises data acquisition equipment, optimization processing equipment and automatic voltage regulation equipment, wherein the data acquisition equipment is respectively connected with a dispatching master station of the power distribution network, a power distribution operation and inspection system and a marketing electricity acquisition system, the output end of the data acquisition equipment is connected with the optimization processing equipment, the output end of the optimization processing equipment is connected with the automatic voltage regulation equipment, the optimization processing equipment is programmed or configured to execute the steps of the 10kV bus voltage optimization method capable of improving the voltage qualification rate of the power distribution network, or a computer program which is programmed or configured to execute the 10kV bus voltage optimization method capable of improving the voltage qualification rate of the power distribution network is stored in a storage medium of the optimization processing equipment.
Furthermore, the invention also provides a computer readable storage medium, which stores a computer program programmed or configured to execute the 10kV bus voltage optimization method capable of improving the voltage qualification rate of the power distribution network.
Compared with the prior art, the invention has the following advantages: according to the invention, the voltage target value of the 10kV bus is optimized by comparing and calculating the normal, overvoltage and undervoltage occupation ratio conditions of the transformer area voltage in the 10kV bus power supply area on the reference day, and the optimized voltage target value of the 10kV bus is transmitted to the AVC system of the power grid for execution. The method can optimize the 10kV bus voltage on the basis of ensuring the self-qualification of the 10kV bus voltage, realizes the improvement of the voltage qualification rate of the power distribution network, and can be used for improving the voltage qualification rate of a 400V power grid at the low-voltage side of a distribution transformer.
Drawings
FIG. 1 is a schematic diagram of a basic flow of a method according to an embodiment of the present invention.
Detailed Description
As shown in fig. 1, the implementation steps of the 10kV bus voltage optimization method capable of improving the power distribution network voltage yield in this embodiment include:
1) determining a calculation reference day of a target 10kV bus;
2) respectively counting and calculating the normal, overvoltage and undervoltage ratio of the transformer area voltage (transformer area distribution transformer low-voltage side voltage) in the reference day power supply area;
3) determining the distribution network voltage condition in the target 10kV bus power supply range according to the normal, overvoltage and undervoltage ratios;
4) and calculating the periodic target 10kV bus voltage target value according to the generation cost of the distribution network voltage condition within the target 10kV bus power supply range. The calculation period is 10kV bus voltage optimization calculation period, and is generally 1 month.
In this embodiment, the detailed steps of step 1) include:
1.1) acquiring a topological relation between a target 10kV bus and a line from a dispatching master station, acquiring the current condition of a 10kV line hanging transformer area from a power distribution operation and detection system, and acquiring the voltage and electric quantity of each transformer area of the current 10kV line from a marketing electricity acquisition system;
1.2) determining a target 10kV bus power supply area in the calculation period according to the topological relation between the target 10kV bus and the line and the current 10kV line hanging area condition; the 10kV bus power supply area is all the power supply areas supplied by the current 10kV bus, if the power supply areas are not increased, decreased or changed, the current 10kV bus power supply area is considered to be unchanged, otherwise, the current 10kV bus power supply area is considered to be changed;
1.3) comparing the target 10kV bus power supply area of the calculation period with the target 10kV bus power supply area of the previous calculation period, if the target 10kV bus power supply area is unchanged, selecting the maximum load day in the calculation period of the target 10kV bus power supply area as a calculation reference day, and otherwise, selecting the day for acquiring topological relation and hanging condition data as the calculation reference day.
In this embodiment, the detailed steps of step 2) include:
2.1) rejecting voltage points lower than a first threshold voltage (the value is 110V in the embodiment) from all voltage points (generally sampled to 4 voltage points/day) aiming at the power supply region intra-area voltage in a reference day, and taking the number of the rest voltage points as the number of statistical voltage points;
2.2) in the rest voltage points, taking the voltage point smaller than the second threshold voltage as an under-voltage point, the voltage point larger than the third threshold voltage as an over-voltage point, taking the voltage point between the second threshold voltage and the third threshold voltage as a normal point, taking the ratio of the number of the under-voltage points to the number of the statistical voltage points as an under-voltage ratio, taking the ratio of the number of the over-voltage points to the number of the statistical voltage points as an over-voltage ratio, and taking the ratio of the number of the normal points to the number of the statistical voltage points as a normal ratio.
In this embodiment, the second threshold voltage is 198V, and the third threshold voltage is 228V. Therefore, in step 2.1), voltage points lower than 110V are eliminated, and the statistical number of voltage points = the number of all voltage points — the number of voltage points lower than 110V; the individual ratios calculated in step 2.2) are:
normal duty = number of voltage points not less than 198V and not more than 228V/number of statistical voltage points;
overvoltage ratio = number of voltage points greater than 228V/number of statistical voltage points;
undervoltage duty = number of voltage points less than 198V/number of statistical voltage points.
In this embodiment, the detailed steps of step 3) include:
3.1) judging whether the normal occupation ratio is more than or equal to the overvoltage occupation ratio and the undervoltage occupation ratio is less than the preset ratio, if so, judging that the voltage of the distribution network in the power supply range of the target 10kV bus is normal, and skipping to execute the step 4); otherwise, skipping to execute the next step;
3.2) judging whether the normal occupation ratio is smaller than the overvoltage occupation ratio and the undervoltage occupation ratio is smaller than a preset ratio, if so, judging that the voltage of the distribution network in the power supply range of the target 10kV bus is higher, and skipping to execute the step 4); otherwise, skipping to execute the next step;
3.3) judging whether the normal occupation ratio is larger than or equal to the overvoltage occupation ratio and the undervoltage occupation ratio is larger than or equal to a preset ratio, and if so, judging that the voltage of a distribution network in the power supply range of the target 10kV bus is low; jump execution step 4).
In this embodiment, the detailed steps of step 4) include:
4.1) judging the voltage condition of the distribution network within the power supply range of the target 10kV bus, and if the voltage of the distribution network within the power supply range of the target 10kV bus is normal, skipping to execute the step 4.2); if the distribution network voltage in the target 10kV bus power supply range is higher, skipping to execute the step 4.3); if the distribution network voltage in the target 10kV bus power supply range is low, skipping to execute the step 4.4); otherwise, skipping to execute the step 4.5);
4.2) judging that the target 10kV bus voltage does not need to be optimized, setting the value of the target 10kV bus voltage target value of the calculation period as the target 10kV bus voltage target value of the previous calculation period, ending and exiting;
4.3) judging whether the sum of the target value of the 10kV bus voltage of the target of the previous calculation period, which is greater than or equal to the lower limit of the 10kV bus voltage (generally 10 kV), and the preset unit optimization value (generally 0.1 kV) is true, if true, setting the value of the target value of the 10kV bus voltage of the target of the calculation period as the difference obtained by subtracting the preset unit optimization value from the target value of the 10kV bus voltage of the target of the previous calculation period, ending and exiting; otherwise, skipping to execute the step 4.5);
4.4) judging whether a difference value obtained by subtracting a preset unit optimization value from an upper limit (generally 10.7 kV) of the voltage of the 10kV bus of the target 10kV bus of the last calculation period is true, if true, setting the value of the target value of the voltage of the 10kV bus of the target 10kV bus of the calculation period as the sum of the target value of the voltage of the 10kV bus of the target 10kV bus of the last calculation period and the preset unit optimization value, ending and exiting; otherwise, skipping to execute the step 4.5);
4.5) judging that the target 10kV bus voltage cannot be optimized, setting the value of the target 10kV bus voltage target value of the calculation period as the target 10kV bus voltage target value of the previous calculation period, ending and exiting.
It should be noted that the above values of the lower voltage limit of the 10kV bus, the upper voltage limit of the 10kV bus and the preset unit optimized value are only optional implementation examples of the embodiment, and those skilled in the art can perform manual setting as needed.
As an optional specific embodiment, the specific process in this embodiment includes:
1. acquiring relevant data of the power distribution network and the current 10kV bus from the acquisition unit;
2. the current 10kV bus is connected with 410 kV lines, and 240 transformer areas are connected in a hooking mode;
3. compared with 6 months, the current 10kV bus power supply area has no change;
4. and 6, the current 10kV bus maximum load in 6 months is 25 days in 6 months, the day is selected as a calculation reference day, and the voltage condition of the distribution room in the day is counted: the total number of voltage points =960, the number of voltage points below 110V =22, the number of voltage points not less than 198V and not more than 228V =325, the number of voltage points greater than 228V =571, the number of voltage points less than 198V = 42; statistical voltage point number =960-22=938, normal duty =325/938=34.6%, overvoltage duty =571/938=60.9%, undervoltage duty =42/938= 4.5%;
5. if the normal ratio is 34.6% < the overpressure ratio is 60.9%, and the underpressure ratio is 4.5% < 5%;
6. considering that the voltage of a distribution network in the current 10kV bus power supply range is higher, and the current 10kV bus voltage target value 10.4 in the previous calculation period is more than or equal to 10kV bus voltage lower limit + unit optimization value =10.1 kV;
7. the current 10kV bus voltage target value =10.4-0.1=10.3kV in the calculation period;
8. and transmitting the current 10kV bus voltage target value 10.3kV of the calculation period to a power grid AVC system for execution.
In addition, considering that the distribution network includes a plurality of 10kV buses and needs batch optimization, this embodiment further provides a batch-oriented 10kV bus voltage optimization method capable of improving the voltage qualification rate of the distribution network, and the implementation steps include:
s1) determining all 10kV buses in the power distribution network;
s2) traversing and selecting one 10kV bus from all 10kV buses as a target 10kV bus;
s3) obtaining the target value of the 10kV bus voltage of the calculation period target by adopting the 10kV bus voltage optimization method capable of improving the voltage qualification rate of the power distribution network; if other 10kV buses in parallel running of the target 10kV bus exist in all the 10kV buses, the voltage target value of the target 10kV bus in the calculation period is also used as the voltage target value of other 10kV buses in the calculation period, and the other 10kV buses are regarded as being traversed, so that the calculation amount can be reduced;
s4) judging whether all the 10kV buses are completely traversed, and if not, skipping to execute the step S2); otherwise, judging that all 10kV buses in the calculation period are completely optimized.
In summary, according to the 10kV bus voltage optimization method capable of improving the power distribution network voltage qualification rate, the purpose of improving the power distribution network voltage qualification rate is achieved by optimizing the 10kV bus voltage, the 10kV bus voltage qualification rate is not reduced, the power distribution network voltage qualification rate is improved, the reactive resources of the main power network of 10kV or more are fully utilized, and the power distribution network voltage regulation and control cost is reduced. According to the embodiment, the 10kV bus voltage can be optimized on the basis of ensuring the self-qualification of the 10kV bus voltage, the voltage qualification rate of the power distribution network is improved, and the method can be used for improving the voltage qualification rate of a 400V power grid on the low-voltage side of a power distribution transformer.
In addition, this embodiment still provides a 10kV bus voltage optimizing system that can promote distribution network voltage qualification rate, includes:
the calculation reference day determining program unit is used for determining the calculation reference day of the target 10kV bus;
the distribution area voltage classification ratio calculation program unit is used for respectively counting and calculating the normal, overvoltage and undervoltage ratios of the distribution area voltage in the power supply area in the reference day;
the distribution network voltage condition classification program unit is used for determining the distribution network voltage condition in the target 10kV bus power supply range according to the normal, overvoltage and undervoltage occupation ratios;
and the voltage target value calculation program unit is used for calculating the periodic target 10kV bus voltage target value according to the generation cost of the distribution network voltage condition within the target 10kV bus power supply range.
In addition, the present embodiment further provides a 10kV bus voltage optimization system capable of increasing the power distribution network voltage yield, which includes a computer device programmed or configured to execute the steps of the aforementioned 10kV bus voltage optimization method capable of increasing the power distribution network voltage yield of the present embodiment, or a storage medium of the computer device having a computer program stored thereon that is programmed or configured to execute the aforementioned 10kV bus voltage optimization method capable of increasing the power distribution network voltage yield of the present embodiment.
In addition, the embodiment also provides a 10kV bus voltage optimization system capable of improving the voltage qualification rate of the power distribution network, which comprises data acquisition equipment, optimization processing equipment and automatic voltage regulation equipment, the data acquisition equipment is respectively connected with a dispatching master station of the power distribution network, a power distribution operation and inspection system and a marketing electricity utilization acquisition system, the output end of the data acquisition equipment is connected with the optimization processing equipment, the output end of the optimization processing equipment is connected with the automatic voltage regulating equipment, the optimization processing device is programmed or configured to perform the steps of the 10kV bus voltage optimization method for improving the voltage yield of the distribution network of the embodiment, or the storage medium of the optimization processing device is stored with a computer program programmed or configured to execute the 10kV bus voltage optimization method capable of improving the voltage yield of the power distribution network in the embodiment. In this embodiment, the automatic voltage adjustment device is specifically implemented by using the existing AVC system of the power distribution network.
In addition, the present embodiment also provides a computer readable storage medium, which stores a computer program programmed or configured to execute the 10kV bus voltage optimization method for improving the power distribution network voltage yield of the present embodiment.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein. The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. 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.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (8)
1. A10 kV bus voltage optimization method capable of improving the voltage qualification rate of a power distribution network is characterized by comprising the following implementation steps:
1) determining a calculation reference day of a target 10kV bus;
2) respectively counting and calculating the normal, overvoltage and undervoltage occupation ratios of the transformer area voltage in the reference day power supply area;
3) determining the distribution network voltage condition in the target 10kV bus power supply range according to the normal, overvoltage and undervoltage ratios;
4) calculating a periodic target 10kV bus voltage target value according to the generation cost of the distribution network voltage condition within the target 10kV bus power supply range;
the detailed steps of the step 3) comprise:
3.1) judging whether the normal occupation ratio is more than or equal to the overvoltage occupation ratio and the undervoltage occupation ratio is less than the preset ratio, if so, judging that the voltage of the distribution network in the power supply range of the target 10kV bus is normal, and skipping to execute the step 4); otherwise, skipping to execute the next step;
3.2) judging whether the normal occupation ratio is smaller than the overvoltage occupation ratio and the undervoltage occupation ratio is smaller than a preset ratio, if so, judging that the voltage of the distribution network in the power supply range of the target 10kV bus is higher, and skipping to execute the step 4); otherwise, skipping to execute the next step;
3.3) judging whether the normal occupation ratio is larger than or equal to the overvoltage occupation ratio and the undervoltage occupation ratio is larger than or equal to a preset ratio, and if so, judging that the voltage of a distribution network in the power supply range of the target 10kV bus is low; skipping to execute the step 4);
the detailed steps of the step 4) comprise:
4.1) judging the voltage condition of the distribution network within the power supply range of the target 10kV bus, and if the voltage of the distribution network within the power supply range of the target 10kV bus is normal, skipping to execute the step 4.2); if the distribution network voltage in the target 10kV bus power supply range is higher, skipping to execute the step 4.3); if the distribution network voltage in the target 10kV bus power supply range is low, skipping to execute the step 4.4); otherwise, skipping to execute the step 4.5);
4.2) judging that the target 10kV bus voltage does not need to be optimized, setting the value of the target 10kV bus voltage target value of the calculation period as the target 10kV bus voltage target value of the previous calculation period, ending and exiting;
4.3) judging whether the sum of the target value of the 10kV bus voltage of the target of the previous calculation period, which is greater than or equal to the lower limit of the 10kV bus voltage, and the preset unit optimization value is established or not, if so, setting the target value of the 10kV bus voltage of the target of the calculation period as a difference value obtained by subtracting the preset unit optimization value from the target value of the 10kV bus voltage of the target of the previous calculation period, ending and exiting; otherwise, skipping to execute the step 4.5);
4.4) judging whether the difference value obtained by subtracting the preset unit optimization value from the upper limit of the 10kV bus voltage of the target 10kV bus voltage in the last calculation period is true, if true, setting the value of the target 10kV bus voltage in the calculation period as the sum of the target 10kV bus voltage in the last calculation period and the preset unit optimization value, ending and exiting; otherwise, skipping to execute the step 4.5);
4.5) judging that the target 10kV bus voltage cannot be optimized, setting the value of the target 10kV bus voltage target value of the calculation period as the target 10kV bus voltage target value of the previous calculation period, ending and exiting.
2. The 10kV bus voltage optimization method capable of improving the voltage yield of the power distribution network according to claim 1, wherein the detailed steps of the step 1) comprise:
1.1) acquiring a topological relation between a target 10kV bus and a line from a dispatching master station, acquiring the current condition of a 10kV line hanging transformer area from a power distribution operation and detection system, and acquiring the voltage and electric quantity of each transformer area of the current 10kV line from a marketing electricity acquisition system;
1.2) determining a target 10kV bus power supply area in the calculation period according to the topological relation between the target 10kV bus and the line and the current 10kV line hanging area condition;
1.3) comparing the target 10kV bus power supply area of the calculation period with the target 10kV bus power supply area of the previous calculation period, if the target 10kV bus power supply area is unchanged, selecting the maximum load day in the calculation period of the target 10kV bus power supply area as a calculation reference day, and otherwise, selecting the day for acquiring topological relation and hanging condition data as the calculation reference day.
3. The 10kV bus voltage optimization method capable of improving the voltage yield of the power distribution network according to claim 1, wherein the detailed steps of the step 2) comprise:
2.1) rejecting voltage points lower than a first threshold voltage from all voltage points according to the power supply region intra-area voltage in a reference day, and taking the number of the remaining voltage points as the number of statistical voltage points;
2.2) in the rest voltage points, taking the voltage point smaller than the second threshold voltage as an under-voltage point, the voltage point larger than the third threshold voltage as an over-voltage point, taking the voltage point between the second threshold voltage and the third threshold voltage as a normal point, taking the ratio of the number of the under-voltage points to the number of the statistical voltage points as an under-voltage ratio, taking the ratio of the number of the over-voltage points to the number of the statistical voltage points as an over-voltage ratio, and taking the ratio of the number of the normal points to the number of the statistical voltage points as a normal ratio.
4. A10 kV bus voltage optimization method capable of improving the voltage qualification rate of a power distribution network is characterized by comprising the following implementation steps:
s1) determining all 10kV buses in the power distribution network;
s2) traversing and selecting one 10kV bus from all 10kV buses as a target 10kV bus;
s3) obtaining a target value of the 10kV bus voltage of the calculation period target by adopting the 10kV bus voltage optimization method capable of improving the voltage qualification rate of the power distribution network according to any one of claims 1-3; if other 10kV buses which are operated in parallel with the target 10kV bus exist in all the 10kV buses, the voltage target value of the target 10kV bus in the calculation period is also used as the voltage target value of other 10kV buses in the calculation period, and the other 10kV buses are regarded as being traversed;
s4) judging whether all the 10kV buses are completely traversed, and if not, skipping to execute the step S2); otherwise, judging that all 10kV buses in the calculation period are completely optimized.
5. The utility model provides a can promote 10kV generating line voltage optimizing system of distribution network voltage qualification rate which characterized in that includes:
the calculation reference day determining program unit is used for determining the calculation reference day of the target 10kV bus;
the distribution area voltage classification ratio calculation program unit is used for respectively counting and calculating the normal, overvoltage and undervoltage ratios of the distribution area voltage in the power supply area in the reference day;
the distribution network voltage condition classification program unit is used for determining the distribution network voltage condition in the target 10kV bus power supply range according to the normal, overvoltage and undervoltage occupation ratios;
the voltage target value calculation program unit is used for calculating the periodic target 10kV bus voltage target value according to the generation cost of the distribution network voltage condition in the target 10kV bus power supply range;
the detailed steps of the distribution network voltage condition classification program unit comprise:
3.1) judging whether the normal occupation ratio is more than or equal to the overvoltage occupation ratio and the undervoltage occupation ratio is less than a preset ratio, if so, judging that the voltage of the distribution network in the power supply range of the target 10kV bus is normal, and skipping to execute a voltage target value calculation program unit; otherwise, skipping to execute the next step;
3.2) judging whether the normal occupation ratio is smaller than the overvoltage occupation ratio and the undervoltage occupation ratio is smaller than a preset ratio, if so, judging that the voltage of the distribution network in the power supply range of the target 10kV bus is higher, and skipping to execute a voltage target value calculation program unit; otherwise, skipping to execute the next step;
3.3) judging whether the normal occupation ratio is larger than or equal to the overvoltage occupation ratio and the undervoltage occupation ratio is larger than or equal to a preset ratio, and if so, judging that the voltage of a distribution network in the power supply range of the target 10kV bus is low; skipping to execute a voltage target value calculation program unit;
the detailed steps of the voltage target value calculation program unit include:
4.1) judging the voltage condition of the distribution network within the power supply range of the target 10kV bus, and if the voltage of the distribution network within the power supply range of the target 10kV bus is normal, skipping to execute the step 4.2); if the distribution network voltage in the target 10kV bus power supply range is higher, skipping to execute the step 4.3); if the distribution network voltage in the target 10kV bus power supply range is low, skipping to execute the step 4.4); otherwise, skipping to execute the step 4.5);
4.2) judging that the target 10kV bus voltage does not need to be optimized, setting the value of the target 10kV bus voltage target value of the calculation period as the target 10kV bus voltage target value of the previous calculation period, ending and exiting;
4.3) judging whether the sum of the target value of the 10kV bus voltage of the target of the previous calculation period, which is greater than or equal to the lower limit of the 10kV bus voltage, and the preset unit optimization value is established or not, if so, setting the target value of the 10kV bus voltage of the target of the calculation period as a difference value obtained by subtracting the preset unit optimization value from the target value of the 10kV bus voltage of the target of the previous calculation period, ending and exiting; otherwise, skipping to execute the step 4.5);
4.4) judging whether the difference value obtained by subtracting the preset unit optimization value from the upper limit of the 10kV bus voltage of the target 10kV bus voltage in the last calculation period is true, if true, setting the value of the target 10kV bus voltage in the calculation period as the sum of the target 10kV bus voltage in the last calculation period and the preset unit optimization value, ending and exiting; otherwise, skipping to execute the step 4.5);
4.5) judging that the target 10kV bus voltage cannot be optimized, setting the value of the target 10kV bus voltage target value of the calculation period as the target 10kV bus voltage target value of the previous calculation period, ending and exiting.
6. A 10kV bus voltage optimization system capable of improving the power distribution network voltage qualification rate, comprising a computer device, wherein the computer device is programmed or configured to perform the steps of the 10kV bus voltage optimization method capable of improving the power distribution network voltage qualification rate of any one of claims 1 to 4, or a storage medium of the computer device has stored thereon a computer program programmed or configured to perform the 10kV bus voltage optimization method capable of improving the power distribution network voltage qualification rate of any one of claims 1 to 4.
7. A10 kV bus voltage optimization system capable of improving the voltage qualification rate of a power distribution network comprises data acquisition equipment, optimization processing equipment and automatic voltage regulation equipment, it is characterized in that the data acquisition equipment is respectively connected with a dispatching master station, a power distribution operation and inspection system and a marketing electricity utilization acquisition system of a power distribution network, the output end of the data acquisition equipment is connected with the optimization processing equipment, the output end of the optimization processing equipment is connected with the automatic voltage regulating equipment, the optimization processing equipment is programmed or configured to execute the steps of the 10kV bus voltage optimization method capable of improving the voltage yield of the power distribution network according to any one of claims 1 to 4, or a storage medium of the optimization processing equipment, wherein a computer program is stored on the storage medium, and is programmed or configured to execute the 10kV bus voltage optimization method capable of improving the voltage yield of the power distribution network according to any one of claims 1 to 4.
8. A computer readable storage medium having stored thereon a computer program programmed or configured to perform the 10kV bus voltage optimization method for increasing the voltage yield of a distribution network according to any of claims 1-4.
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