CN106779319B - Evaluation method for power supply scheme of large-scale urban complex - Google Patents
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Abstract
The invention discloses an evaluation method of a large-scale urban complex power supply scheme, which comprises the following steps: acquiring the safety factor of a power supply line of a large-scale urban complex power supply scheme; acquiring efficiency parameters of a power supply scheme of a large-scale urban complex; obtaining a cost parameter of a power supply scheme of a large-scale urban complex; and generating an evaluation result of the power supply scheme of the large-scale urban complex according to the following formula: assessment = safety factor x performance parameter ÷ cost parameter. The embodiment of the invention generates the safety factor by setting the safety factor of the large-scale urban complex power supply scheme and by the power supply coefficient, the loop coefficient and the N-1 check coefficient, thereby taking the safety of the large-scale urban complex power supply scheme as an important influence factor to participate in the calculation of the final evaluation result; therefore, the finally selected large-scale urban complex power supply scheme is more reliable and safer.
Description
Technical Field
The invention relates to the field of electric power, in particular to an evaluation method of a power supply scheme of a large-scale urban complex.
Background
The large-scale urban complex power supply system has the characteristics of large installed power capacity, high development speed and the like.
Before the large-scale urban complex power supply system is established, different large-scale urban complex power supply schemes need to be evaluated respectively, and then on the premise of meeting the requirements for power supply safety and reliability, the scheme with the efficiency and cost meeting the requirements is selected, so that reference is provided for the establishment of the large-scale urban complex power supply system.
In the prior art, when comparing and selecting the power supply schemes of the large-scale urban complex, cost or benefit factors related to different power supply schemes of the large-scale urban complex are mainly concerned, quantitative conversion is carried out through a model, and finally the quality of the power supply schemes of the large-scale urban complex is determined by comparing the cost or the benefit.
The inventor finds that the large-scale urban complex power supply scheme selected by the comparison and selection mode in the prior art has at least the following defects:
the power supply scheme of the large-scale urban complex screened by the mode in the prior art can not be effectively ensured due to the safety, so that the optimal power supply scheme of the large-scale urban complex can not be obtained.
Disclosure of Invention
The invention aims to solve the technical problem of how to obtain an optimal power supply scheme of a large-scale urban complex, and specifically comprises the following steps:
the embodiment of the invention provides an evaluation method of a large-scale urban complex power supply scheme, which comprises the following steps:
s11, acquiring the safety factor of the power supply circuit of the large-scale urban complex power supply scheme; the safety coefficient is the product of a power coefficient, a loop coefficient and an N-1 check coefficient; the coefficient value of the power supply coefficient is determined according to the power supply composition mode of the large-scale city complex power supply scheme; the coefficient value of the loop coefficient is determined according to whether the loop is a single loop or not; the coefficient value of the N-1 check coefficient is determined according to the result of the N-1 check;
s12, acquiring efficiency parameters of the power supply scheme of the large-scale urban complex;
s13, obtaining the cost parameter of the power supply scheme of the large-scale urban complex;
s14, generating an evaluation result of the power supply scheme of the large-scale urban complex according to the following formula:
assessment = safety factor x performance parameter ÷ cost parameter.
Preferably, in an embodiment of the present invention, the obtaining the efficiency parameter of the power supply scheme of the large-scale urban complex includes:
s21, acquiring a correction coefficient of the power supply line; the coefficient value of the correction coefficient is determined according to the structural mode of the grid structure of the power supply circuit;
s22, calculating the utilization efficiency of the power supply line according to the transmission load and the limit transmission capacity of the associated line of the large-scale urban complex power supply scheme;
s23, budgeting the increased electricity selling amount of the large-scale city complex power supply scheme; calculating the periodic income according to the electricity sales amount and the income of unit electricity sales amount;
s24, generating the efficiency parameter according to the following formula:
efficiency parameter = correction factor x utilization efficiency x cycle gain.
Preferably, in an embodiment of the present invention, the obtaining a cost parameter of the power supply scheme of the large-scale urban complex includes:
s31, calculating the initial investment of the large-scale urban complex power supply scheme according to the scales and the construction costs of the lines, the switching station, the ring main unit and the pole top switch related to the large-scale urban complex power supply scheme;
s32, calculating the maintenance cost of the large-scale urban complex power supply scheme according to the medium-voltage power grid maintenance cost ratio condition in the recent years of the deployment area of the large-scale urban complex power supply scheme;
s33, calculating the operation cost of the large-scale urban complex power supply scheme according to the network loss load, the maximum load utilization hours and the regional average electricity purchase price of the large-scale urban complex power supply scheme;
s34, calculating the decommissioning cost of the large-scale urban complex power supply scheme according to the residual value rate and the area scrapped asset management cost ratio of the large-scale urban complex power supply scheme;
s35, generating the cost parameter according to the following formula:
the cost parameter = initial investment + maintenance cost + operating cost + decommissioning cost.
Preferably, in an embodiment of the present invention, the determining the coefficient value of the power coefficient according to the power configuration mode of the power supply scheme of the large-scale urban complex includes:
if the power supply is from the same bus of the same transformer substation, determining the coefficient value of the power supply coefficient to be 0; if the power supply is from different buses of the same transformer substation, determining the coefficient value of the power supply coefficient to be 1; if the power supply is from different transformer substations, determining the coefficient value of the power supply coefficient to be 2;
the coefficient value of the loop coefficient is determined according to whether the loop is judged to be a single loop or not, and the method comprises the following steps:
if the power supply line has 1 loop, determining the coefficient value of the loop coefficient to be 0; if the power supply line has 2 loops or more, determining the coefficient value of the loop coefficient to be 1;
the coefficient value of the N-1 check coefficient is determined according to the result of the N-1 check, and comprises the following steps:
if the power supply line does not meet the N-1 check, determining the coefficient value of the N-1 check coefficient to be 0; and if the power supply line meets the N-1 check, determining the coefficient value of the N-1 check coefficient to be 1.
Preferably, in an embodiment of the present invention, the determining the coefficient value of the correction coefficient according to the configuration of the grid structure of the power supply line includes:
if the grid structure of the power supply line is a single-ring network, a single-interconnection network, a double-ring network or a parallel direct supply grid structure, determining that the coefficient value of the correction coefficient is 2; if the grid structure of the power supply line is a two-connection grid structure, determining the coefficient value of the correction coefficient to be 1.5; if the grid structure of the power supply line is a radiation type grid structure, determining that the coefficient value of the correction coefficient is 1.25;
the calculating the utilization efficiency of the power supply line according to the total transmission load and the limit transmission capacity of the associated line of the large-scale urban complex power supply scheme comprises the following steps:
utilization efficiency = total saturated transport load ÷ limit transport capacity;
the increased electricity selling amount of the large city complex power supply scheme is estimated; calculating the periodic income according to the electricity sales amount and the unit electricity sales income, and the method comprises the following steps:
the periodic revenue = Σ (the electricity sales amount increased by the large city complex power supply scheme × unit electricity sales amount revenue × present value of one payment coefficient) × the fund recovery coefficient.
Preferably, in an embodiment of the present invention, the obtaining a cost parameter of the power supply scheme of the large-scale urban complex includes:
the calculating the initial investment of the large-scale urban complex power supply scheme according to the scales and the construction costs of the lines, the switching stations, the ring main units, the column switches and the like related to the large-scale urban complex power supply scheme comprises the following steps:
initial investment = (line length x line integrated cost + number of switching stations x integrated cost of switching stations + number of ring main unit seats x ring main unit integrated cost + number of pole switches x integrated cost of pole switches) × capital recovery factor;
the calculating the maintenance cost of the large-scale urban complex power supply scheme according to the medium-voltage power grid maintenance cost ratio condition in the recent years in the deployment area of the large-scale urban complex power supply scheme comprises the following steps:
maintenance cost = initial investment x maintenance cost proportionality coefficient x capital recovery coefficient;
the calculating the operation cost of the large-scale urban complex power supply scheme according to the network loss load, the maximum load utilization hours and the regional average electricity purchase price of the large-scale urban complex power supply scheme comprises the following steps:
the operation cost = Σ (network loss load of the large-sized city complex power supply scheme × maximum load utilization hours × regional average electricity purchase price × one payment present value coefficient) × fund recovery coefficient;
the calculating the decommissioning cost of the large-scale urban complex power supply scheme according to the ratio of the residual value rate of the large-scale urban complex power supply scheme to the area scrapped asset management cost comprises the following steps:
retirement cost = initial investment x (ratio of scrap asset management costs-residue rate) x one payout present factor x fund recovery factor.
In the embodiment of the invention, the safety factor of the large-scale urban complex power supply scheme is set and is generated through the power supply coefficient, the loop coefficient and the N-1 check coefficient, so that the safety of the large-scale urban complex power supply scheme can be used as an important influence factor to participate in the calculation of the final evaluation result. Therefore, the finally selected large-scale urban complex power supply scheme is more reliable and safer.
In addition, the embodiment of the invention takes the whole life cycle of the large-scale urban complex power supply scheme as a deadline, constructs an evaluation index system from three dimensions of power supply safety, efficiency and cost, provides an SEC-based large-scale urban complex power supply scheme evaluation model, and comprehensively analyzes the economy and the safety of each large-scale urban complex power supply scheme; the evaluation model constructed by the large-scale urban complex power supply scheme evaluation method in the embodiment of the invention can effectively reduce the requirements of the large-scale urban complex power supply scheme on basic data and personnel technical level, realize the engineering of the large-scale urban complex power supply scheme selection, and further effectively reduce the cost of the large-scale urban complex power supply scheme selection.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic diagram of the steps of the evaluation method for the power supply scheme of the large-scale urban complex described in the present application;
FIG. 2 is a schematic diagram of another step of the evaluation method for the power supply scheme of the large-scale urban complex described in the present application;
fig. 3 is a schematic diagram of another step of the evaluation method of the power supply scheme of the large-scale urban complex in the present application.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to obtain an optimal power supply scheme for a large-scale urban complex, in an embodiment of the present invention, an evaluation method for a power supply scheme for a large-scale urban complex is provided as shown in fig. 1, and includes the steps of:
s11, acquiring the safety factor of the power supply circuit of the large-scale urban complex power supply scheme; the safety coefficient is the product of a power coefficient, a loop coefficient and an N-1 check coefficient; the coefficient value of the power supply coefficient is determined according to the power supply composition mode of the large-scale city complex power supply scheme; the coefficient value of the loop coefficient is determined according to whether the loop is a single loop or not; the coefficient value of the N-1 check coefficient is determined according to the result of the N-1 check;
the safety of the large-scale urban complex power supply system is more and more emphasized, but the safety degree of the large-scale urban complex power supply scheme selected by the selection scheme in the prior art cannot be digitalized by systematically acquiring various factors influencing the safety of the large-scale urban complex power supply system, so that the optimal large-scale urban complex power supply scheme is difficult to obtain.
In the embodiment of the present invention, the power supply configuration of the large-scale urban complex power supply scheme, whether the loop of the large-scale urban complex power supply scheme is a single loop, and N-1 of the large-scale urban complex power supply scheme checks the main factors affecting the safety of the large-scale urban complex power supply scheme, and sets the corresponding weight, so as to quantify the safety degree of the large-scale urban complex power supply scheme, specifically including:
the coefficient value of the power supply coefficient is determined according to the power supply composition mode of the large-scale urban complex power supply scheme; specifically, if the power supply is from the same bus of the same substation, the coefficient value of the power supply coefficient is determined to be 0; if the power supply is from different buses of the same transformer substation, determining the coefficient value of the power supply coefficient to be 1; if the power supply is from different transformer substations, determining the coefficient value of the power supply coefficient to be 2;
determining the coefficient value of the loop coefficient according to whether the loop is a single loop or not; specifically, if the power supply line has 1 loop, the coefficient value of the loop coefficient is determined to be 0; if the power supply line is 2 loops or more, determining the coefficient value of the loop coefficient to be 1;
the coefficient value of the N-1 check coefficient is determined according to the result of the N-1 check; specifically, if the power supply line does not satisfy the N-1 check, the coefficient value of the N-1 check coefficient is determined to be 0; and if the power supply line meets the N-1 check, determining the coefficient value of the N-1 check coefficient to be 1.
After the power coefficient, the loop coefficient and the N-1 check coefficient in the power supply scheme of the large-scale urban complex are obtained, the safety factor of the power supply scheme of the large-scale urban complex can be calculated, and specifically, the safety factor can be the product of the power coefficient, the loop coefficient and the N-1 check coefficient.
S12, acquiring efficiency parameters of the power supply scheme of the large-scale urban complex;
in the embodiment of the invention, the efficiency parameter of the large-scale urban complex power supply scheme is required to be obtained to represent and quantify the efficiency degree of the large-scale urban complex power supply scheme; the specific steps of the embodiment of the invention can be as follows:
s21, acquiring a correction coefficient of the power supply line; the coefficient value of the correction coefficient is determined according to the forming mode of the grid structure of the power supply circuit;
in practical application, the specific determination manner of the coefficient value of the correction coefficient may be that, if the grid structure of the power supply line is a single-ring network, a single-interconnection network, a double-ring network or a parallel direct-supply grid structure, the coefficient value of the correction coefficient is determined to be 2; if the grid structure of the power supply line is a two-connection grid structure, determining the coefficient value of the correction coefficient to be 1.5; if the grid structure of the power supply line is a radiation type grid structure, determining the coefficient value of the correction coefficient to be 1.25;
s22, calculating the utilization efficiency of the power supply line according to the transmission load and the limit transmission capacity of the associated line of the large-scale urban complex power supply scheme;
in practical applications, the specific determination algorithm of the utilization efficiency may be that the utilization efficiency = saturated transport load sum ÷ limit transport capacity;
s23, budgeting the increased electricity selling amount of the large city complex power supply scheme; calculating the periodic income according to the electricity sales amount and the income of unit electricity sales amount;
in practical applications, the specific determination algorithm of the periodic profit may be, periodic profit = Σ (electricity sales amount increased by large-scale city complex power supply scheme × revenue per electricity sales amount × coefficient of present value of payment) × coefficient of fund recovery
S24, generating the efficiency parameter according to the following formula:
efficiency parameter = correction factor x utilization efficiency x cycle gain.
After important factors influencing the efficiency of the large-scale urban complex power supply scheme, such as the correction coefficient, the utilization efficiency and the periodic yield, are obtained, an overall quantized value of the efficiency of the large-scale urban complex power supply scheme can be obtained in a product mode.
S13, obtaining the cost parameter of the power supply scheme of the large-scale urban complex;
in the embodiment of the invention, the cost parameter of the large-scale urban complex power supply scheme is required to be obtained to represent and quantify the cost degree of the large-scale urban complex power supply scheme; the specific steps of the embodiment of the invention can be as follows:
s31, calculating the initial investment of the large-scale urban complex power supply scheme according to the scales and the manufacturing costs of lines, switching stations, ring main units, column switches and the like related to the large-scale urban complex power supply scheme;
in practical applications, the specific determination algorithm of the initial investment may be that the initial investment = (length of the line × the integrated manufacturing cost of the line + the number of the switching stations × the integrated manufacturing cost of the switching stations + the number of the ring main units × the integrated manufacturing cost of the ring main units + the number of the switchboards on the column × the integrated manufacturing cost of the switches on the column) × the capital recovery factor.
S32, calculating the maintenance cost of the large-scale urban complex power supply scheme according to the medium-voltage power grid maintenance cost proportion condition in the recent years of the deployment area of the large-scale urban complex power supply scheme;
in practical applications, the specific determination algorithm of the maintenance cost may be that the maintenance cost = initial investment × maintenance cost proportionality coefficient × capital recovery coefficient.
S33, calculating the operation cost of the large-scale urban complex power supply scheme according to the network loss load, the maximum load utilization hours and the regional average electricity purchase price of the large-scale urban complex power supply scheme;
in practical applications, the specific determination algorithm of the operation cost may be that the operation cost = Σ (the network loss load of the large-scale urban complex power supply scheme × the maximum load utilization hours × the area average electricity purchase price × the one-time payment present value coefficient) × the capital recovery coefficient.
S34, calculating the decommissioning cost of the large-scale urban complex power supply scheme according to the ratio of the residual value rate of the large-scale urban complex power supply scheme to the area scrapped asset management cost;
in practical applications, the retirement cost may be determined by a specific algorithm, where the retirement cost = initial investment x (ratio of discarded asset management cost to residual rate) x one-time payment present value coefficient x fund recovery coefficient.
S35, generating a cost parameter according to the following formula:
the cost parameter = initial investment + maintenance cost + operating cost + decommissioning cost.
After the important factors of initial investment, maintenance cost, operation cost and retirement cost which influence the cost of the large-scale urban complex power supply scheme are obtained, an overall quantized value of the cost of the large-scale urban complex power supply scheme can be obtained in a summing mode.
S14, generating an evaluation result of the power supply scheme of the large-scale urban complex according to the following formula:
assessment = safety factor x performance parameter ÷ cost parameter.
After important factors such as the safety factor, the efficiency parameter and the cost parameter which influence the cost of the large-scale urban complex power supply scheme are determined, an overall quantized value of the cost of the large-scale urban complex power supply scheme can be obtained through the formula.
It should be noted that, in the embodiment of the present invention, examples of specific values of coefficient values in the power coefficient, the loop coefficient, the N-1 check coefficient, and the correction coefficient are only the selection of a preferred typical value in the process of implementing the method for evaluating the power supply scheme of the large-scale urban complex, and are not used to limit the present invention to use other coefficient values to achieve the purpose of the present invention.
In the embodiment of the invention, the safety factor of the large-scale urban complex power supply scheme is set and is generated through the power supply coefficient, the loop coefficient and the N-1 check coefficient, so that the safety of the large-scale urban complex power supply scheme can be used as an important influence factor to participate in the calculation of the final evaluation result. Therefore, the finally selected large-scale urban complex power supply scheme is more reliable and safer.
In addition, the embodiment of the invention takes the whole life cycle of the large-scale urban complex power supply scheme as a deadline, constructs an evaluation index system from three dimensions of power supply safety, efficiency and cost, provides an SEC-based large-scale urban complex power supply scheme evaluation model, and comprehensively analyzes the economy and the safety of each large-scale urban complex power supply scheme; the evaluation model constructed by the large-scale urban complex power supply scheme evaluation method in the embodiment of the invention can effectively reduce the requirements of the large-scale urban complex power supply scheme on basic data and personnel technical level, realize the engineering of the large-scale urban complex power supply scheme selection, and further effectively reduce the cost of the large-scale urban complex power supply scheme selection.
The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (2)
1. A method for evaluating a power supply scheme of a large-scale urban complex is characterized by comprising the following steps:
s11, acquiring the safety factor of the power supply circuit of the large-scale urban complex power supply scheme; the safety coefficient is the product of a power coefficient, a loop coefficient and an N-1 check coefficient; the coefficient value of the power supply coefficient is determined according to the power supply composition mode of the large-scale city complex power supply scheme; the coefficient value of the loop coefficient is determined according to whether the loop is a single loop or not; the coefficient value of the N-1 check coefficient is determined according to the result of the N-1 check;
s12, acquiring efficiency parameters of the power supply scheme of the large-scale urban complex;
s13, obtaining the cost parameter of the power supply scheme of the large-scale urban complex;
s14, generating an evaluation result of the power supply scheme of the large-scale urban complex according to the following formula:
the evaluation result is the safety factor multiplied by the efficiency parameter divided by the cost parameter;
wherein, step S12 includes:
s21, acquiring a correction coefficient of the power supply line; the coefficient value of the correction coefficient is determined according to the forming mode of the grid structure of the power supply circuit;
in practical application, the specific determination mode of the coefficient value of the correction coefficient is that if the grid structure of the power supply line is a single-ring network, a single-interconnection network, a double-ring network or a parallel direct-supply grid structure, the coefficient value of the correction coefficient is determined to be 2; if the grid structure of the power supply line is a two-connection grid structure, determining the coefficient value of the correction coefficient to be 1.5; if the grid structure of the power supply line is a radiation type grid structure, determining the coefficient value of the correction coefficient to be 1.25;
s22, calculating the utilization efficiency of the power supply line according to the transmission load and the limit transmission capacity of the associated line of the large-scale urban complex power supply scheme;
in practical application, the specific determination algorithm of the utilization efficiency is that the utilization efficiency is the total saturated transportation load divided by the limit transportation capacity;
s23, budgeting the increased electricity selling amount of the large city complex power supply scheme; calculating the periodic income according to the electricity sales amount and the income of unit electricity sales amount;
in practical application, the specific determination algorithm of the periodic benefit is that the periodic benefit is Σ (the electricity sales amount increased by the large-scale urban complex power supply scheme × the unit electricity sales income × the present value coefficient of one payment) × the fund recovery coefficient;
s24, generating the efficiency parameter according to the following formula:
the efficiency parameter is the correction coefficient multiplied by the utilization efficiency multiplied by the periodic yield;
after important factors influencing the efficiency of the large-scale urban complex power supply scheme, such as the correction coefficient, the utilization efficiency and the periodic income, are obtained, an overall quantitative value of the efficiency of the large-scale urban complex power supply scheme is obtained in a product mode;
step 13 comprises:
s31, calculating the initial investment of the large-scale urban complex power supply scheme according to the scales and the construction costs of the circuit, the switching station, the ring main unit and the column switch related to the large-scale urban complex power supply scheme;
in practical application, the specific determination algorithm of the initial investment is that the initial investment is (the length of the line is multiplied by the integrated manufacturing cost of the line, the number of seats of the switching station is multiplied by the integrated manufacturing cost of the switching station, the number of seats of the ring main unit is multiplied by the integrated manufacturing cost of the ring main unit, the number of the switch stands is multiplied by the integrated manufacturing cost of the switch stands) multiplied by the capital recovery coefficient;
s32, calculating the maintenance cost of the large-scale urban complex power supply scheme according to the medium-voltage power grid maintenance cost proportion condition in the recent years of the deployment area of the large-scale urban complex power supply scheme;
in practical application, the specific determination algorithm of the maintenance cost is that the maintenance cost is initial investment multiplied by a maintenance cost proportional coefficient multiplied by a fund recovery coefficient;
s33, calculating the operation cost of the large-scale urban complex power supply scheme according to the network loss load, the maximum load utilization hours and the regional average electricity purchase price of the large-scale urban complex power supply scheme; in practical application, the specific determination algorithm of the operation cost is that the operation cost ═ Σ (network loss load of a large-scale urban complex power supply scheme × maximum load utilization hours × regional average electricity purchase price × one payment present value coefficient) × capital recovery coefficient;
s34, calculating the decommissioning cost of the large-scale urban complex power supply scheme according to the ratio of the residual value rate of the large-scale urban complex power supply scheme to the area scrapped asset management cost;
in practical application, the specific determining algorithm of the decommissioning cost is that the decommissioning cost is initial investment x (ratio of discarded asset management cost to residual value rate) x one-time payment present value coefficient x fund recovery coefficient;
s35, generating a cost parameter according to the following formula:
the cost parameter is initial investment, maintenance cost, operation cost and retirement cost;
after important factors of initial investment, maintenance cost, operation cost and retirement cost which influence the cost of the large-scale urban complex power supply scheme are obtained, an overall quantized value of the cost of the large-scale urban complex power supply scheme is obtained in a summing mode.
2. The method for evaluating a power supply scheme of a large-scale urban complex according to claim 1, wherein the coefficient value of the power supply coefficient is determined according to the power supply configuration mode of the power supply scheme of the large-scale urban complex, and comprises:
if the power supplies of the power supply scheme are from the same bus of the same transformer substation, determining the coefficient value of the power supply coefficient to be 0; if the power supplies of the power supply scheme are from different buses of the same transformer substation, determining the coefficient value of the power supply coefficient to be 1; if the power supplies of the power supply scheme are from different transformer substations, determining the coefficient value of the power supply coefficient to be 2;
the coefficient value of the loop coefficient is determined according to whether the loop is judged to be a single loop or not, and the method comprises the following steps: if the power supply line has 1 loop, determining the coefficient value of the loop coefficient to be 0; if the power supply line has 2 loops or more, determining the coefficient value of the loop coefficient to be 1;
the coefficient value of the N-1 check coefficient is determined according to the result of the N-1 check, and comprises the following steps:
if the power supply line does not meet the N-1 check, determining the coefficient value of the N-1 check coefficient to be 0; and if the power supply line meets the N-1 check, determining the coefficient value of the N-1 check coefficient to be 1.
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| CN102368314A (en) * | 2011-10-24 | 2012-03-07 | 浙江省电力公司 | LCC theory-based method of comprehensive evaluation of transmission network planning scheme |
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| CN102368314A (en) * | 2011-10-24 | 2012-03-07 | 浙江省电力公司 | LCC theory-based method of comprehensive evaluation of transmission network planning scheme |
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