GB2545644A - Computer-implemented method for designing an electrical network - Google Patents
Computer-implemented method for designing an electrical network Download PDFInfo
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- GB2545644A GB2545644A GB1522173.2A GB201522173A GB2545644A GB 2545644 A GB2545644 A GB 2545644A GB 201522173 A GB201522173 A GB 201522173A GB 2545644 A GB2545644 A GB 2545644A
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- 238000000034 method Methods 0.000 title claims abstract description 40
- 235000000332 black box Nutrition 0.000 description 1
- 244000085682 black box Species 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/30—Circuit design
- G06F30/36—Circuit design at the analogue level
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/30—Circuit design
- G06F30/39—Circuit design at the physical level
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Abstract
A computer-implemented method for designing an electrical network comprising selecting by a user a number of electrical components provided by the computer, including least one generator or source component and at least one load or sink component, positioning the selected electrical components in a workspace and linking them to provide an electrical circuit. The method is characterised by the user defining a value for the output parameter for the source(s) 2 and a value for the input parameter for the load(s) 5,8, and generating by the computer a list of source and load components with the defined values. The computer iterates through the electrical circuit starting from a load component 5, wherein at each component 4,6,7, the value for the output parameter is calculated based on the values of the input parameters of the linked child components and the value for the input parameter is calculated based on the component type and the calculated value for the output parameter. The iterating step is repeated for all the load components 8 until no further values can be calculated. The parameter may be voltage rating, power rating or current rating.
Description
Computer-implemented method for designing an electrical network
The invention relates to a computer-implemented method for designing an electrical network, which method comprises the steps of: (a) providing by the computer a number of electrical components, each having at least one input and at least one output parameter, wherein the output parameters and input parameters are of the same type; (b) selecting by a user a number of electrical components with at least one generator or source component and at least one load or sink component; (c) positioning by the user the selected electrical components in a workspace; (d) linking the positioned electrical components by the user to provide an electrical circuit.
Such methods are already known as CAD systems with which a user can design an electrical network.
However, when modeling or designing a large electrical network, a lot of time is required for entering and determining the ratings, such as voltage rating and power rating, for the separate components of the electrical network.
When a change is made to the electrical network, which is typically the strength of CAD systems, the electrical network has to be checked and the ratings for the components need to be recalculated. This could easily lead to human errors .
For example US 20040267513 discloses such a design method for power networks, wherein the network is designed out of a number of components. For each component a number of parameters is defined by the user, such as voltage rating.
After the electrical network has been fully defined by the user, the computer can calculate the cost of the components and optimize for the costs by selecting the most cost effective components, which comply with the values for the parameters specified by the user. According to this method, each component is considered a blackbox, in which cost calculation means are incorporated, which allows for selecting an optimal product for each component based on costs. There is no interaction between the linked components of the electrical network. US 2004049772 discloses an electrical network design program, which allows for an inexperienced person to design a network by selecting a number of components out of a list, placing the components in a workspace and linking the components .
The design program according to this publication is capable of auto-dimensioning the different components by using default values and formulas stored in a database. The autodimensioning is started at the feed side and propagated throughout the electrical network towards the loads.
The disadvantage is that a structured method needs to be followed when designing the electrical network. Furthermore, by using default values, the electrical network will not be designed to the minimal requirements but only to the available components and will therefor never be fully optimized.
It is an object of the invention to reduce the above mentioned disadvantages.
This object is achieved according to the invention with a method according to the preamble, which method is characterized by: (e) defining by the user a value for the at least one output parameter for the at least one generator and a value for the at least one input parameter for the at least one load; (f) generating by the computer a list of generator components with the defined value for the at least one output parameter and a list of load components with the defined value for the at least one input parameter; (g) iterating by the computer through the electrical circuit starting from a component out of the list of load components, wherein at each component the value for the output parameter is calculated based on the values of the input parameters of the linked child components and wherein at each component the value for the input parameter is calculated based on the component type and the calculated value for the output parameter; (h) repeating the iterating step (g) with all the components out of the list of load components until no further values can be calculated.
After designing an electrical network by the user, by positioning components in a workspace and linking the components together, a user only needs to define the value of an input parameter of load components and the value of an output parameter of generator components. These values can be derived for example from the desired voltage rating of the load components and the generator components.
Then the computer starts at one of the loads and iterates through the electrical network. Starting from a first load, the computer follows one of the links from the first load to a parent component. Then the computer determines which other components are connected to the output parameter of the parent component. When the input parameter values of all the other connected components are known, the value for the output parameter of the parent component can be calculated.
If the parameter is a voltage rating, then the values of the input parameter of the linked components should be identical and the value for the output parameter of the parent component can be set to the same value.
In case of a power rating, the computer sums up the values of input parameters of the linked components to determine the power rating value of the output parameter of the parent component.
Depending on the type of parent component, the value of the input parameter can then be calculated based on the value of the output parameter. For example, when the component is a switch and a voltage rating is determined, the value for the input parameter can be copied from the value for the output parameter.
In case a value for a parameter cannot be determined because one of the linked components has an undefined value for an input parameter, the component is temporarily skipped and a next component in the electrical network is processed. This can result in additional values set, which could make it possible for the temporarily skipped component to be processed successfully after all.
If no additional values can be set, despite skipping components temporarily, the method is stopped, such that a user can complete the undefined values by hand.
By starting at the load components, the values for the parameters are defined at a minimal value and overdimensioning is prevented. A preferred embodiment of the computer-implemented method according to the invention, further comprises the steps of: (i) iterating by the computer through the electrical circuit starting from a component out of the list of generator components, wherein at each component the value of the input parameter is calculated based on the values of the output parameters of the linked parent components and wherein at each component the value of the output parameter is calculated based on the component type and the calculated input parameter. (j) repeating the iterating step (i) with all the components out of the list of generator components until no further values can be calculated.
When no additional values can be set by iterating from a load component, this embodiment of the method according to the invention continues by iterating from the load components to calculate the values for input parameters of the linked child components. When the value of an input parameter is determined, the computer can determine based on the type of component, the value for the output parameter of the component.
By iterating through the electrical network, similar to the steps (g) and (h), but starting from a generator component instead of a load component. This will allow for more values to be determined, such that a user needs even less values to determine by hand.
Another embodiment of the computer-implemented method according to the invention, comprises the step of: (k) repeating the steps (g), (h), (i), (j) as long as at every repetition at least one additional value is calculated.
When new values have been determined by the steps (i) and (j), but still some values are undefined, then repeating the steps (g) and (h), in which the computer iterates from the load components, could result in further values for output parameters to be defined. This in turn could lead to some values for input parameter to be defined, when the steps (i) and (j) are repeated for a next time.
In a further embodiment of the computer-implemented method according to the invention a component is placed in a queue in either step (g) or (i) when the calculation of the output value or the input value respectively of the component results in an undefined value and wherein the value of the queued value is recalculated at a later stage in the iteration.
Using a queue, the iteration through the electrical circuit cannot get stuck on a component of which a value cannot be determined. By skipping said component and placing the component in a queue, it is ensured that the component is at least revisited once to retry to determine the value after further values of other components have been determined. A further preferred embodiment of the method according to the invention comprises the steps of: - after finishing step (h) or (j) generating by the computer a list of components of which at least one parameter has an undefined value; - defining by the user a value for each of the undefined values.
When the computer has tried in different iterations to determine the values of input parameters and output parameters and still some values remain undefined, a user can define said values by hand.
One option is to use default values for the undefined values, which could be automated by computer, or the user can decide to define those values by hand.
In yet another embodiment of the computer- implemented method according to the invention at least one of the components is a transformer and wherein at step (g) the value for the input parameter is maintained at the set or undefined value and wherein at step (i) the value for the output parameter is maintained at the set or undefined value.
In case of a transformer component, the value for the input parameter cannot be unambiguously derived from a calculated value for the output parameter and vice versa. Therefor, with a transformer component, the value for the other parameter is maintained at the set or undefined value and is not altered based on the calculated parameter value.
Preferably, the parameter type is selected from the group: voltage rating, power rating or current rating.
These and other features of the invention will be elucidated in conjunction with the accompanying drawings.
Figure 1 shows a first example for a first embodiment of the method according to the invention.
Figure 2 shows a second example for a second embodiment of the method according to the invention.
In figure 1 a electrical circuit 1 is shown, composed out of components selected by a user, positioned in a workspace and linked together. The electrical circuit 1 has a generator 2, a first transformer 3, a first circuit breaker 4, a first load 5, a second circuit breaker 6, a second transformer 7 and a second load 8.
The user has defined the value for the output parameter of the generator 1 as 1100V, the value for the input parameter of the first load as 200V and the value for the input parameter of the second load as 500V.
Then according to the embodiment of the method according to the invention, a computer will generate a list with generator components 2 and a list with load components 5, 8 .
Thereafter, the computer will start to iterate through the electrical network 1 beginning at the first load 5. From the first load 5 the method iterates to the parent node, the first circuit breaker 4. This circuit breaker 4 is only connected to the load 5, such that the value for the output parameter of the circuit breaker 4 can be set to the same value as the value of the input parameter of the load 5, i.e. 200V. Being a circuit breaker 4, the value for the input parameter can be copied from the output parameter and thus be set also to 200V.
The next iteration step goes to the first transformer 3, being the parent node for the first circuit breaker 4. Although the output of the first transformer 3 is not only connected to the first circuit breaker 4 but also to the second circuit breaker 6, the parameter being of the voltage type, the value for the output parameter of the transformer 3 can still be set to the same value as the input parameter of the circuit breaker 4, even when the input parameter of the circuit breaker 6 is undefined. So, the value for the output parameter of the first transformer 3 will be set also to 200V.
The next iteration step goes to the generator 2, being the parent node of the transformer 3. As a generator node is reached, the method of the invention will continue with the next load 8 out of the generated list of loads.
From the second load 8, the parent node is the second transformer 7. The value for the output parameter of the transformer 7 can be set to the value of the input parameter of the second load 8, i.e. 500V. As the component 7 is a transformer, the value for the input parameter remains undefined, such that at the next iteration, the value for the output parameter of the second circuit breaker 6 cannot be calculated. This will end this iteration.
To further define parameter values, the method according to the invention will then start with the first generator component 2 out of the generated list. The generator 2 has a value for the output parameter of 1100V. The child node of the generator 2 is the first transformer 3, such that the value of the input parameter can be set to 1100V.
As the value for the output parameter of the first transformer 3 is already set, the method can iterate further to the second circuit breaker 6 and set the values for the input parameter and output parameter to 200V.
Finally, the value for the input parameter of the second transformer 7 can also be set to 200V, such that all components now have defined voltage ratings.
Figure 2 shows a second electrical circuit 10 defined by a user. The electrical circuit 10 has a first generator 11, a first transformer 12, a first circuit breaker 13, a second transformer 14, a third transformer 15, a first load 16 and a second load 17.
Similar to the method described in conjunction with figure 1, the method starts with the first load 16 and defines the value for the output parameter of the third transformer 15 as 1000V. The iteration continues at the second transformer 14 and copies the value for the output parameter of the transformer 14 from the input parameter of the second load 17, i.e. 440V.
The iteration stops and starts with the second load 17, but this does not add any new values. The method can start again with the first load 16 or first start iterating from the first generator 11. In the later case, the value for the input parameter of the first transformer 12 is set to 2000V and then the iteration is stopped as no further values can be defined.
Repeating the iteration from the load components, will provide a value for the input parameter of the third transformer 15 and will set the value at 440V.
However at this point of the method, no further values can be defined leaving the values for the output of the first transformer 12, the input and output values for the first circuit breaker 13 and the input value for the second transformer 14 undefined.
According to the method of the invention, the user is presented with the option to define these values by hand or to use default values. It is for example possible, to set the values for the input and output parameters of the first circuit breaker to 10000V. Then the iteration steps of the method according to the invention can be repeated such that the values for the output parameter of the first transformer 12 and for the input parameter of the second transformer are automatically determined and also set to 10000V.
Claims (7)
1. Computer-implemented method for designing an electrical network, which method comprises the steps of: (a) providing by the computer a number of electrical components, each having at least one input and at least one output parameter, wherein the output parameters and input parameters are of the same type; (b) selecting by a user a number of electrical components with at least one generator component and at least one load component; (c) positioning by the user the selected electrical components in a workspace; (d) linking the positioned electrical components by the user to provide an electrical circuit; characterized by (e) defining by the user a value for the at least one output parameter for the at least one generator or source and a value for the at least one input parameter for the at least one load or sink; (f) generating by the computer a list of generator components with the defined value for the at least one output parameter and a list of load components with the defined value for the at least one input parameter; (g) iterating by the computer through the electrical circuit starting from a component out of the list of load components, wherein at each component the value for the output parameter is calculated based on the values of the input parameters of the linked child components and wherein at each component the value for the input parameter is calculated based on the component type and the calculated value for the output parameter; (h) repeating the iterating step (g) with all the components out of the list of load components until no further values can be calculated.
2. Computer-implemented method according to claim 1, further comprising the steps of: (i) iterating by the computer through the electrical circuit starting from a component out of the list of generator components, wherein at each component the value of the input parameter is calculated based on the values of the output parameters of the linked parent components and wherein at each component the value of the output parameter is calculated based on the component type and the calculated input parameter. (j) repeating the iterating step (i) with all the components out of the list of generator components until no further values can be calculated.
3. Computer-implemented method according to claim 2, comprising the step of: (k) repeating the steps (g), (h), (i), (j) as long as at every repetition at least one additional value is calculated.
4. Computer-implemented method according to any of the preceding claims, wherein in either step (g) or (i) a component is placed in a queue when the calculation of the output value or the input value respectively of the component results in an undefined value and wherein the value of the queued value is recalculated at a later stage in the iteration.
5. Computer-implemented method according to any of the preceding claims, comprising the steps of: - after finishing step (h) or (j) generating by the computer a list of components of which at least one parameter has an undefined value; - defining by the user a value for each of the undefined values.
6. Computer-implemented method according to any of the preceding claims, wherein at least one of the components is a transformer and wherein at step (g) the value for the input parameter is maintained at the set or undefined value and wherein at step (i) the value for the output parameter is maintained at the set or undefined value.
7. Computer-implemented method according to any of the preceding claims, wherein the parameter type is selected from the group: voltage rating, power rating or current rating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1522173.2A GB2545644A (en) | 2015-12-16 | 2015-12-16 | Computer-implemented method for designing an electrical network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1522173.2A GB2545644A (en) | 2015-12-16 | 2015-12-16 | Computer-implemented method for designing an electrical network |
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| Publication Number | Publication Date |
|---|---|
| GB201522173D0 GB201522173D0 (en) | 2016-01-27 |
| GB2545644A true GB2545644A (en) | 2017-06-28 |
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| GB1522173.2A Withdrawn GB2545644A (en) | 2015-12-16 | 2015-12-16 | Computer-implemented method for designing an electrical network |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6122443A (en) * | 1997-07-28 | 2000-09-19 | Kabushiki Kaisha Toshiba | Wire length minimization apparatus and method |
| US20090210842A1 (en) * | 2008-02-18 | 2009-08-20 | International Business Machines Corporation | Automated Method for Buffering in a VLSI Design |
| WO2014125058A1 (en) * | 2013-02-15 | 2014-08-21 | Schneider Electric Industries Sas | Method for generating a file for modeling electrical equipment, and related computer program material, modeling file, and electronic displaying device |
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2015
- 2015-12-16 GB GB1522173.2A patent/GB2545644A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6122443A (en) * | 1997-07-28 | 2000-09-19 | Kabushiki Kaisha Toshiba | Wire length minimization apparatus and method |
| US20090210842A1 (en) * | 2008-02-18 | 2009-08-20 | International Business Machines Corporation | Automated Method for Buffering in a VLSI Design |
| WO2014125058A1 (en) * | 2013-02-15 | 2014-08-21 | Schneider Electric Industries Sas | Method for generating a file for modeling electrical equipment, and related computer program material, modeling file, and electronic displaying device |
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| Publication number | Publication date |
|---|---|
| GB201522173D0 (en) | 2016-01-27 |
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