CN109376967B - Method for evaluating environmental protection characteristics of power grid planning - Google Patents
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Abstract
The invention provides a method for evaluating environmental protection characteristics of power grid planning, which comprises the following steps: s1, calculating the ratio of the online electric quantity of the renewable energy and the energy abandoning rate of the renewable energy to evaluate the admitting ability of the renewable energy; s2, calculating carbon emission in the system operation and power grid operation processes, and evaluating the carbon emission; s3, evaluating the influence on the surrounding environment in the construction process of the power grid planning project by combining six indexes of noise, a power frequency electric field, a power frequency magnetic field, equipment environmental protection rate, land utilization efficiency and city landscape cooperative scheduling; and S4, generating an evaluation report according to the evaluation results of the steps S1-S3. The method not only evaluates the acceptance capability of different schemes on renewable energy sources, the carbon emission and other indexes, but also evaluates the adverse effect on the surrounding environment in the construction process of the power grid planning project.
Description
Technical Field
The invention mainly relates to the related fields of power system operation analysis, reliability evaluation and the like, in particular to a method for evaluating environmental protection characteristics of power grid planning.
Background
The power grid planning scheme has important significance for promoting the consumption of renewable energy and reducing carbon emission, so the environmental protection of the planning scheme needs to be evaluated. In addition, the construction of power transmission and transformation projects inevitably needs to enter densely populated areas, and the influence of the power transmission and transformation projects on natural ecology such as land, water sources and the like and the influence of electromagnetic interference caused by high-voltage power transmission lines on human health and daily life are all problems needing attention.
At present, the research on the environmental protection of a power grid generally considers directly generated environmental pollution or influence, and the evaluation on the environmental protection of power grid planning is not accurate, so that certain social influence can be generated when the power grid is implemented on the ground.
Disclosure of Invention
In order to solve the problems, the invention provides a method for evaluating environmental protection characteristics of power grid planning, which not only evaluates the acceptance capability of different schemes on renewable energy sources, carbon emission and other indexes, but also evaluates the adverse effects on the surrounding environment in the construction process of a power grid planning project.
The technical scheme of the invention is realized by the following modes:
the invention provides a method for evaluating environmental protection characteristics of power grid planning, which comprises the following steps:
s1, calculating the ratio of the online electric quantity of the renewable energy and the energy abandoning rate of the renewable energy to evaluate the admitting ability of the renewable energy;
s2, calculating carbon emission in the system operation and power grid operation processes, and evaluating the carbon emission;
s3, evaluating the influence on the surrounding environment in the construction process of the power grid planning project by combining six indexes of noise, a power frequency electric field, a power frequency magnetic field, equipment environmental protection rate, land utilization efficiency and city landscape cooperative scheduling;
and S4, generating an evaluation report according to the evaluation results of the steps S1-S3.
Further, the specific implementation process of step S1 is as follows: and respectively calculating a net electric quantity ratio a1 of renewable energy sources and a renewable energy abandon rate a2, wherein the renewable energy receiving capacity a3 is (a1+ a2)/2 is 100.
Further, the calculation formula of the renewable energy abandon rate is as follows:
further, the specific implementation process of step S2 is as follows:
obtaining system running carbon emission through system running simulation, and converting the system running carbon emission into a system running carbon emission score according to the percentage;
respectively calculating the grid loss carbon emission and the SF6 leakage rate, wherein the running carbon emission score of the power grid is (grid loss carbon emission + SF6 leakage rate)/2 x 100;
and (4) calculating the score of the carbon emission size, namely (the system operation carbon emission score + the power grid operation carbon emission score)/2.
Further, the calculation formula of the grid loss carbon emission is as follows: and grid loss carbon emission is grid loss electricity quantity and grid reference emission factor.
Further, the formula for calculating the leakage rate of SF6 is as follows:
further, the specific implementation process of step S3 is as follows:
s31: collecting operation sounds of construction machinery and power equipment, wherein when the operation sounds completely accord with the building construction site boundary noise limit value, the noise score is 100, otherwise, the noise score is 0;
s32: collecting or calculating the vertical component of the electric field intensity at a position 1.5m away from the ground, and when the vertical component is smaller than the national standard limit, the power frequency electric field is divided into 100, otherwise, the power frequency electric field is 0;
s33: respectively calculating the magnetic field generated by the current of each wire by applying an ampere loop law, and then superposing the results to obtain the magnetic field intensity around the wire, wherein when the magnetic field intensity is less than a power frequency limit value of 0.1mT, the power frequency magnetic field is divided into 100, otherwise, the power frequency magnetic field is 0;
s34: counting the environmental protection rate of the equipment, wherein when the environmental protection rate of the equipment is greater than the proportion specified by the national environmental protection, the environmental protection rate of the equipment is 100, otherwise, the environmental protection rate of the equipment is 0;
s35: using formulas
Calculating land resource utilization efficiency, wherein the land resource utilization efficiency is divided into 100 land resource utilization efficiency;
s36: randomly sampling various types of landscape live-action photos in a planning range, finally selecting representative landscapes as sample materials for evaluation, and predicting the coordination degree of a planned line and the urban landscape by adopting a picture stacking method to obtain an urban landscape coordination degree score;
s36: and scoring the influence on the surrounding environment in the construction process of the power grid planning project to be the sum of the scores in the steps S31-S35.
Further, the specific implementation process of step S4 is as follows: a summary table containing the index names and their scores is generated based on the scores of the respective indexes in steps S1-S3.
The invention has the beneficial effects that:
the scheme is based on the acceptance capability of renewable energy sources, carbon emission and other indexes, the environmental protection performance of the planning scheme is evaluated, in addition, the construction of the power transmission and transformation project inevitably enters densely populated areas, the influence of the power transmission and transformation project on natural ecology such as land and water sources and the influence of electromagnetic interference caused by high-voltage power transmission lines on human health and daily life are all problems needing attention, and therefore, the method and the system evaluate the influence of the power grid planning project on the surrounding environment in the construction process by combining six indexes of noise, a power frequency electric field, a power frequency magnetic field, equipment environmental protection rate, land utilization efficiency and city landscape co-scheduling, and realize comprehensive and careful evaluation on the environmental protection performance.
Drawings
FIG. 1 is an overall flow diagram of the method of the present invention.
Detailed Description
The following detailed description of the embodiments of the present invention is provided in conjunction with the accompanying drawings, and the following disclosure provides specific embodiments of the apparatus and method for implementing the invention, so that those skilled in the art can more clearly understand how to implement the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments or configurations discussed. It should be noted that the components illustrated in the figures are not necessarily drawn to scale. Descriptions of well-known components and processing techniques and procedures are omitted so as to not unnecessarily limit the invention. It should be understood that while the invention has been described in conjunction with the preferred specific embodiments thereof, that these are set forth merely for purposes of illustration and are not intended to limit the scope of the invention.
Examples
As shown in fig. 1, the present invention provides a method for evaluating environmental protection characteristics of power grid planning, where the method includes:
and S1, calculating the ratio of the online electric quantity of the renewable energy and the energy abandoning rate of the renewable energy to evaluate the admitting ability of the renewable energy. The specific implementation process is as follows: and respectively calculating a net electric quantity ratio a1 of renewable energy sources and a renewable energy abandon rate a2, wherein the renewable energy receiving capacity a3 is (a1+ a2)/2 is 100.
The ratio of the renewable energy on-grid electricity quantity refers to the ratio of the renewable energy on-grid electricity quantity to the total power supply quantity of a power grid. In the operation process of the power grid, the phenomena of wind abandonment, light abandonment and the like can be inevitably generated. In the process of planning the power grid, the energy abandon rate of the renewable energy sources should be reduced as much as possible, and the consumption capacity of the power grid to the renewable energy sources is improved. The energy rejection of renewable energy sources is defined as:
and S2, calculating the carbon emission during the operation of the system and the operation of the power grid, and estimating the carbon emission.
The specific implementation process of step S2 is as follows:
1) different power grid planning schemes have influence on the receiving capacity of different types of power supplies, and a good power grid planning scheme is coordinated with the power supply structure and the layout, so that a low-carbon power supply is received as much as possible, and the carbon emission of the system operation is reduced. The carbon emission during system operation refers to the carbon emission caused by the supply load of the system under the planning scheme of the power grid to be selected. The index may be calculated by running simulations and then converted to a system running carbon emission score in percent.
2) The power grid also causes carbon emission during operation, and mainly comprises two types: one is the generation extra carbon emissions due to grid line loss; the other type is SF6 leakage caused by SF6 equipment widely adopted in the operation process of the power grid. And respectively calculating the grid loss carbon emission and the SF6 leakage rate, wherein the running carbon emission score of the power grid is (grid loss carbon emission + SF6 leakage rate)/2 x 100.
Wherein, the calculation formula of the network loss carbon emission is as follows: and grid loss carbon emission is grid loss electricity quantity and grid reference emission factor. The formula for calculating the SF6 leakage rate is as follows:
3) and (4) calculating the score of the carbon emission size, namely (the system operation carbon emission score + the power grid operation carbon emission score)/2.
And S3, evaluating the influence on the surrounding environment in the construction process of the power grid planning project by combining six indexes of noise, power frequency electric field, power frequency magnetic field, equipment environmental protection rate, land utilization efficiency and city landscape co-scheduling.
The specific implementation process of step S3 is as follows:
s31: in the construction of power grid planning projects, large equipment such as cranes are generally used, and the surrounding environment is severely interfered by mechanical noise generated by the equipment during use. Meanwhile, some power equipment also generates various noises and the like during operation, such as various noises generated by a transformer and a reactor. Therefore, during the construction of the power grid project, the design of the used instruments, equipment and structures is guaranteed to meet various national noise requirements.
The scoring principle of the step is as follows: collecting the operation sounds of construction machinery and power equipment, and when the operation sounds all accord with the noise limit value of the construction site boundary, the noise score is 100, otherwise, the noise score is 0.
S32: the power frequency electric field of the three-phase alternating current transmission line is the result of the combined action of the charges of the three-phase wires, and for the electric field, the earth can be similar to a conductor, the direction of the electric field intensity of the ground surface is basically vertical to the ground, and the maximum value of the electric field intensity is approximately equal to the component vertical to the ground in the vicinity of 1.5m above the ground. Therefore, in the environmental impact evaluation, the vertical component of the electric field strength at 1.5m from the ground is generally used as the evaluation value of the power frequency electric field. The size of the power frequency electric field generated by the power transmission line is related to various factors such as voltage grade, wire distance to ground, wire arrangement mode, line return number and the like, and a method combining analog analogy and theoretical calculation can be generally adopted.
The scoring principle of the step is as follows: and collecting or calculating the vertical component of the electric field intensity at a position 1.5m away from the ground, and when the vertical component is smaller than the national standard limit value, the power frequency electric field score is 100, otherwise, the power frequency electric field score is 0.
S33: under the power frequency condition, the magnetic field of the line is generated only by current, the ampere loop law can be applied to calculate the magnetic field generated by the current of each wire respectively, and the results are superposed to obtain the magnetic field intensity around the wires. The power frequency limit value of 0.1mT of the international radiation protection association for public radiation all day is generally used as the evaluation standard of the power frequency magnetic field.
The scoring principle of the step is as follows: respectively calculating the magnetic field generated by the current of each wire by applying an ampere loop law, and then superposing the results to obtain the magnetic field intensity around the wire, wherein when the magnetic field intensity is less than a power frequency limit value of 0.1mT, the power frequency magnetic field is divided into 100, otherwise, the power frequency magnetic field is 0;
s34: the environmental protection rate of the equipment refers to the proportion of equipment, building materials and auxiliary construction equipment which are installed and used in the project construction and construction process and reach the relevant environmental protection regulations of the state.
The scoring principle of the step is as follows: and (4) counting the environmental protection rate of the equipment, wherein when the environmental protection rate of the equipment is greater than the proportion specified by the national environmental protection, the environmental protection rate of the equipment is 100, otherwise, the environmental protection rate of the equipment is 0.
S35: the power transmission network planning project occupies farmlands, woodlands and houses along the line, and obviously, the scheme with less resource occupation is better. Meanwhile, the larger the transmission electric quantity of the transmission line occupying the same area is, the more sufficient the utilization of the changed line is. Therefore, the environmental protection performance of the planning scheme can be measured by adopting the land resource utilization efficiency, and the expression is as follows:
in the formula, K is the total number of the newly added line corridors.
The scoring principle of the step is as follows: using formulas
And calculating the land resource utilization efficiency, wherein the land resource utilization efficiency is divided into 100 land resource utilization efficiencies.
S36: the city landscape coordinated dispatching is mainly embodied in the aspect of visual influence, and comprises subjective perception factors such as visual beauty, psychological comfort and the like. Randomly sampling various types of landscape live-action photos in a planning range, finally selecting representative landscapes as sample materials for evaluation, and predicting the coordination degree of a planned line and the urban landscape by adopting a picture stacking method to obtain the urban landscape coordination degree score.
S36: and scoring the influence on the surrounding environment in the construction process of the power grid planning project to be the sum of the scores in the steps S31-S35.
S4: a summary table containing the index names and their scores is generated based on the scores of the respective indexes in steps S1-S3.
Moreover, the scope of the present application is not intended to be limited to the particular embodiments of the process, machine, manufacture, composition of matter, means, methods and steps described in the specification. As one of ordinary skill in the art will readily appreciate from the disclosure of the present invention, processes, machines, manufacture, compositions of matter, means, methods, or steps, presently existing or later to be developed, that perform substantially the same function or achieve substantially the same result as the corresponding embodiments described herein may be utilized according to the present invention. Accordingly, the appended claims are intended to include within their scope such processes, machines, manufacture, compositions of matter, means, methods, or steps.
Claims (6)
1. A method for evaluating environmental protection characteristics of power grid planning is characterized by comprising the following steps:
s1, calculating the ratio of the online electric quantity of the renewable energy and the energy abandoning rate of the renewable energy to evaluate the admitting ability of the renewable energy;
the specific implementation process of step S1 is as follows: respectively calculating a net electric quantity ratio a1 of renewable energy sources and a renewable energy abandon rate a2, wherein the renewable energy receiving capacity a3 is (a1+ a2)/2 is 100;
the formula for calculating the energy abandon rate of the renewable energy source is as follows:
s2, calculating carbon emission in the system operation and power grid operation processes, and evaluating the carbon emission;
s3, evaluating the influence on the surrounding environment in the construction process of the power grid planning project by combining six indexes of noise, a power frequency electric field, a power frequency magnetic field, equipment environmental protection rate, land utilization efficiency and city landscape cooperative scheduling;
and S4, generating an evaluation report according to the evaluation results of the steps S1-S3.
2. The method for evaluating the environmental protection characteristics of power grid planning as claimed in claim 1, wherein the step S2 is implemented by:
obtaining system running carbon emission through system running simulation, and converting the system running carbon emission into a system running carbon emission score according to the percentage;
respectively calculating the grid loss carbon emission and the SF6 leakage rate, wherein the running carbon emission score of the power grid is (grid loss carbon emission + SF6 leakage rate)/2 x 100;
and (4) calculating the score of the carbon emission size, namely (the system operation carbon emission score + the power grid operation carbon emission score)/2.
3. The method for evaluating the environmental protection characteristics of power grid planning as claimed in claim 2, wherein the calculation formula of the grid loss carbon emission is as follows: and grid loss carbon emission is grid loss electricity quantity and grid reference emission factor.
4. The method for evaluating environmental protection characteristics of power grid planning as claimed in claim 2, wherein the calculation formula of the SF6 leakage rate is as follows:
5. the method for evaluating the environmental protection characteristics of power grid planning as claimed in claim 1, wherein the step S3 is implemented by:
s31: collecting operation sounds of construction machinery and power equipment, wherein when the operation sounds completely accord with the building construction site boundary noise limit value, the noise score is 100, otherwise, the noise score is 0;
s32: collecting or calculating the vertical component of the electric field intensity at a position 1.5m away from the ground, and when the vertical component is smaller than the national standard limit, the power frequency electric field is divided into 100, otherwise, the power frequency electric field is 0;
s33: respectively calculating the magnetic field generated by the current of each wire by applying an ampere loop law, and then superposing the results to obtain the magnetic field intensity around the wire, wherein when the magnetic field intensity is less than a power frequency limit value of 0.1mT, the power frequency magnetic field is divided into 100, otherwise, the power frequency magnetic field is 0;
s34: counting the environmental protection rate of the equipment, wherein when the environmental protection rate of the equipment is greater than the proportion specified by the national environmental protection, the environmental protection rate of the equipment is 100, otherwise, the environmental protection rate of the equipment is 0;
s35: using formulas
Calculating land resource utilization efficiency, wherein the land resource utilization efficiency is divided into 100 land resource utilization efficiency, and K is the total number of newly added line corridors;
s36: randomly sampling various types of landscape live-action photos in a planning range, finally selecting representative landscapes as sample materials for evaluation, and predicting the coordination degree of a planned line and the urban landscape by adopting a picture stacking method to obtain an urban landscape coordination degree score;
s36: and scoring the influence on the surrounding environment in the construction process of the power grid planning project to be the sum of the scores in the steps S31-S35.
6. The method for evaluating the environmental protection characteristics of power grid planning as claimed in claim 1, wherein the step S4 is implemented by: a summary table containing the index names and their scores is generated based on the scores of the respective indexes in steps S1-S3.
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| CN102315642A (en) * | 2011-06-27 | 2012-01-11 | 山东电力研究院 | Environmental impact assessment method of power grid planning scheme |
| CN103544373A (en) * | 2013-09-09 | 2014-01-29 | 河海大学 | Method for assessing cleanliness of intelligent power distribution network |
| CN108846569A (en) * | 2018-06-07 | 2018-11-20 | 华北电力大学（保定） | A kind of power distribution network low-carbon environment-friendly horizontal dynamic appraisal procedure |
| CN108985532A (en) * | 2017-06-02 | 2018-12-11 | 上海交通大学 | Net source lotus scheduling evaluation system and method based on carbon emission |
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| US8600572B2 (en) * | 2010-05-27 | 2013-12-03 | International Business Machines Corporation | Smarter-grid: method to forecast electric energy production and utilization subject to uncertain environmental variables |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102315642A (en) * | 2011-06-27 | 2012-01-11 | 山东电力研究院 | Environmental impact assessment method of power grid planning scheme |
| CN103544373A (en) * | 2013-09-09 | 2014-01-29 | 河海大学 | Method for assessing cleanliness of intelligent power distribution network |
| CN108985532A (en) * | 2017-06-02 | 2018-12-11 | 上海交通大学 | Net source lotus scheduling evaluation system and method based on carbon emission |
| CN108846569A (en) * | 2018-06-07 | 2018-11-20 | 华北电力大学（保定） | A kind of power distribution network low-carbon environment-friendly horizontal dynamic appraisal procedure |
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