Method for determining control value of hybrid electric field of parallel erected AC-DC transmission line

Abstract

The application discloses a kind of method and system for determining parallel erection ac-dc transmission line mixed electric field control value, comprising: obtaining the demand parameter information of the ac-dc transmission line to be erected;Based on the demand parameter information, the control value curve of the transmission line mixed electric field and the matching of the relationship curve of power frequency electric field intensity and direct current electric field intensity are carried out respectively, to determine the control value curve of target mixed electric field and the relationship curve of target power frequency electric field intensity and direct current electric field intensity;Based on the control value curve of the mixed electric field and the relationship curve of target power frequency electric field intensity and direct current electric field intensity, determine the mixed electric field control value;The present application is based on the sample distribution in the perception test, the relationship curve of ac-dc mixed electric field when sample does not appear unacceptable feeling under different probability is obtained, when the same tower or same corridor parallel erection ac-dc transmission line is designed, according to the balance between economic cost and environmental protection, the line can be accurately controlled under the premise of environmental protection.

Description

Technical Field

[0001] This invention relates to the field of power transmission line design technology, and more specifically, to a method and system for determining the control values ​​of the mixed electric field of parallel AC / DC power transmission lines. Background Technology

[0002] To improve the power transmission capacity of power corridors, my country has adopted methods such as parallel construction of AC / DC transmission lines along the corridor and co-construction of AC / DC transmission lines on the same tower in some areas with tight power transmission corridors. When AC / DC lines are constructed in parallel with the corridor or on the same tower, a mixed AC / DC electric field is generated on the ground, including both power frequency and DC components. When the coexistence of AC and DC electric fields exceeds a certain level, it can cause noticeable physical sensations for people moving around under the lines, leading to unease and distress.

[0003] When designing AC / DC transmission lines to be erected on the same tower or along the same corridor, the design control values ​​for the AC / DC hybrid electric field must first be determined. Based on these values, important parameters such as minimum conductor height, proximity distance, and corridor width are then determined. The design control values ​​for the AC / DC hybrid electric field can be determined through human perception experiments. The ground electric field control value beneath the transmission line is generally determined based on the direct perception level of a human being in the electric field without contact with other objects, while the ground electric field control value along the edge of the transmission line corridor is determined based on the transient electric shock perception level of a human being.

[0004] The co-construction of AC and DC lines along corridors or towers is a new power transmission method that has emerged in the development of my country's power grid. Its electric field is generated jointly by the charges on the AC and DC conductors and the space charges produced by the corona discharge of the AC and DC conductors, resulting in a mixed electric field containing both power frequency and DC components. When AC and DC electric fields act on the human body together, the sensation is more pronounced than when only a power frequency electric field or a single DC electric field acts on the body. Therefore, the control value for the mixed AC / DC electric field should be determined based on the human body's perception level in different AC and DC electric fields.

[0005] In direct human sensation experiments, test subjects enter the test area and experience the stimulation of the electric field on body parts such as hair, cheeks, and arms. Transient electric shock sensation experiments primarily consider two extreme conditions: a person insulated from ground touching a grounded metal body, and a person with good grounding touching a grounded metal body. In addition to recording the test subjects' transient electric shock sensations, measurements are also taken of the human body.

[0006] By statistically analyzing human sensation samples under different AC and DC electric field ratios and values, the distribution range of human sensation levels under different AC / DC mixed electric fields can be obtained. This allows for the acquisition of AC (power frequency) and DC electric field relationship curves under different probabilities when unacceptable direct and transient electric shock sensations are not experienced. Determining the design control values ​​for the mixed electric field of AC / DC transmission lines based on the AC / DC electric field relationship curves under what probabilities and conditions remains a problem to be solved.

[0007] Therefore, a method and system are needed to determine the control values ​​of the mixed electric field of parallel AC / DC transmission lines. Summary of the Invention

[0008] This invention proposes a method and system for determining the control values ​​of the mixed electric field of parallel AC / DC transmission lines, in order to solve the problem of how to efficiently determine the design control values ​​of the mixed electric field of parallel AC / DC transmission lines.

[0009] To address the aforementioned problems, according to one aspect of the present invention, a method for determining the control values ​​of the mixed electric field of parallel AC / DC transmission lines is provided, the method comprising:

[0010] Obtain the required parameters for the AC and DC transmission lines to be erected;

[0011] Based on the aforementioned demand parameter information, the control value curve of the hybrid electric field of the transmission line and the relationship curve between the power frequency electric field strength and the DC electric field strength are matched respectively to determine the control value curve of the target hybrid electric field and the relationship curve between the target power frequency electric field strength and the DC electric field strength.

[0012] The control value of the mixed electric field is determined based on the control value curve of the mixed electric field and the relationship curve between the target power frequency electric field strength and the DC electric field strength; wherein, the control value of the mixed electric field includes: the absolute value of the DC electric field strength and the effective value of the power frequency electric field strength.

[0013] Preferably, the required parameter information includes: test type, probability of no unacceptable experience during the test, conductor type, type of area traversed by the transmission line, and whether it is the edge of a line corridor.

[0014] Preferably, the control value curve of the target mixed electric field includes: the control value curve of the AC / DC mixed electric field under the line and the control value curve of the AC / DC mixed electric field along the edge of the transmission line corridor;

[0015] The control value curve of the offline hybrid electric field is determined using the following methods:

[0016] For main conductors, when the transmission line passes through a non-residential area, the control value curve of the AC / DC hybrid electric field under the line is determined as follows:

[0017]

[0018]

[0019]

[0020]

[0021] For main conductors, when the transmission line passes through a residential area, the control value curve of the AC / DC hybrid electric field under the line is determined as follows:

[0022]

[0023]

[0024]

[0025]

[0026] For wet conductors, when the transmission line passes through a non-residential area, the control value curve for the AC / DC hybrid electric field under the line is determined as follows:

[0027]

[0028]

[0029]

[0030]

[0031] For wet conductors, when the transmission line passes through a residential area, the control value curve of the AC / DC mixed electric field under the line is determined as follows:

[0032]

[0033]

[0034]

[0035]

[0036] The control value curves of the AC / DC hybrid electric field along the edge of the transmission line corridor are determined using the following methods:

[0037] When a person insulated from ground touches a grounded metal body without experiencing an unacceptable transient electric shock under a preset probability and the transient discharge charge is less than 3 μC, determine the control value curve of the AC / DC mixed electric field along the edge of the transmission line corridor, including:

[0038]

[0039]

[0040]

[0041] When a person with good grounding touches an insulated metal object and experiences no unacceptable transient electric shock under a preset probability, and the transient discharge charge is less than 3 μC, determine the control value curve of the AC / DC mixed electric field along the edge of the transmission line corridor, including:

[0042]

[0043]

[0044]

[0045]

[0046] Among them, E DC E is the absolute value of the DC electric field intensity. AC denoted as the effective value of the power frequency electric field strength, and p is the probability that no unacceptable sensations occurred during the experiment.

[0047] Preferably, for the main conductor, when the transmission line passes through a residential area, E AC The value is less than or equal to 7kV / m, E DC The value is less than or equal to 25 kV / m;

[0048] For wet conductors, when the transmission line passes through a non-residential area, E AC The value is less than or equal to 10 kV / m, E DC The value is less than or equal to 36 kV / m;

[0049] For wet conductors, when the transmission line passes through a residential area, E AC The value is less than or equal to 7kV / m, E DC The value should be less than or equal to 30 kV / m;

[0050] When a person insulated from the ground touches a grounded metal body and does not experience an unacceptable transient electric shock, E AC The value is less than or equal to 4kV / m, E DC The value should be less than or equal to 15 kV / m;

[0051] When a person insulated from the ground touches a grounded metal body and does not experience an unacceptable transient electric shock, E AC The value is less than or equal to 4kV / m, E DC The value is less than or equal to 15 kV / m.

[0052] Preferably, the method determines the relationship curve between the target power frequency electric field strength and the DC electric field strength using the following method:

[0053] In direct perception experiments, under different probabilities of no unacceptable direct perception, the relationship curves between the target power frequency electric field strength and the DC electric field strength are determined, including:

[0054] E DC =0.2108E 2 AC –4.8002E AC +29.658, p=95%,

[0055] E DC =0.2077E 2 AC -4.9820E AC +32.497, p=90%,

[0056] E DC =0.2024E 2 AC -5.0327E AC +34.096, p=85%,

[0057] E DC =0.2024E 2 AC -5.1145E AC +35.450, p=80%,

[0058] E DC =0.1994E 2 AC -5.1369E AC +36.496, p=75%,

[0059] E DC =0.1893E 2 AC -5.0582E AC +37.121, p=70%,

[0060] In a test where a person insulated from ground touches a grounded metal body, the relationship curves between the target power frequency electric field strength and the DC electric field strength are determined under different probabilities of not experiencing an unacceptable transient electric shock, including:

[0061] E DC = -1.1684E 2 AC +1.3033E AC +12.8537, p=95%,

[0062] E DC = -0.9945E 2 AC +0.3446E AC +14.9979, p=90%,

[0063] E DC = -0.8051E 2 AC –0.6334E AC +16.9111, p=85%,

[0064] E DC = -0.6198E 2 AC –1.5673E AC +18.6555, p=80%,

[0065] E DC = -0.4425E 2 AC –2.4492E AC +20.2689, p=75%,

[0066] E DC = -0.2737E 2 AC –3.2814E AC +21.7765, p=70%,

[0067] In a well-grounded human touching an insulated metal object, the relationship curves between the target power frequency electric field strength and the DC electric field strength were determined under different probabilities of not experiencing an unacceptable transient electric shock, including:

[0068] E DC = -1.0232E 2 AC +0.7694E AC +12.1193, p=95%,

[0069] E DC = -0.9648E 2 AC +0.2733E AC +13.5256, p=90%,

[0070] E DC = -0.9295E 2 AC –0.02027E AC +14.5332, p=85%,

[0071] EDC = -0.9083E 2 AC –0.2026E AC +15.3528, p=80%,

[0072] E DC = -0.8990E 2 AC –0.3010E AC +16.0545, p=75%,

[0073] E DC = -0.9025E 2 AC -0.3195E AC +16.6711, p=70%,

[0074] Among them, E DC E is the absolute value of the DC electric field intensity. AC denoted as the effective value of the power frequency electric field strength, and p is the probability that no unacceptable sensations occurred during the experiment.

[0075] According to another aspect of the present invention, a system for determining the control values ​​of a hybrid electric field in parallel AC / DC transmission lines is provided, the system comprising:

[0076] The demand parameter information acquisition unit is used to acquire the demand parameter information of the AC and DC transmission lines to be erected;

[0077] The matching unit is used to match the control value curve of the hybrid electric field of the transmission line and the relationship curve between the power frequency electric field strength and the DC electric field strength based on the demand parameter information, so as to determine the control value curve of the target hybrid electric field and the relationship curve between the target power frequency electric field strength and the DC electric field strength.

[0078] A hybrid electric field control value determination unit is used to determine the hybrid electric field control value based on the control value curve of the hybrid electric field and the relationship curve between the target power frequency electric field strength and the DC electric field strength; wherein, the hybrid electric field control value includes: the absolute value of the DC electric field strength and the effective value of the power frequency electric field strength.

[0079] Preferably, the required parameter information includes: test type, probability of no unacceptable experience during the test, conductor type, type of area traversed by the transmission line, and whether it is the edge of a line corridor.

[0080] Preferably, in the matching unit, the control value curve of the target mixed electric field includes: the control value curve of the AC / DC mixed electric field under the line and the control value curve of the AC / DC mixed electric field along the edge of the transmission line corridor;

[0081] The control value curve of the offline hybrid electric field is determined using the following methods:

[0082] For main conductors, when the transmission line passes through a non-residential area, the control value curve of the AC / DC hybrid electric field under the line is determined as follows:

[0083]

[0084]

[0085]

[0086]

[0087] For main conductors, when the transmission line passes through a residential area, the control value curve of the AC / DC hybrid electric field under the line is determined as follows:

[0088]

[0089]

[0090]

[0091]

[0092] For wet conductors, when the transmission line passes through a non-residential area, the control value curve for the AC / DC hybrid electric field under the line is determined as follows:

[0093]

[0094]

[0095]

[0096]

[0097] For wet conductors, when the transmission line passes through a residential area, the control value curve of the AC / DC mixed electric field under the line is determined as follows:

[0098]

[0099]

[0100]

[0101]

[0102] The control value curves of the AC / DC hybrid electric field along the edge of the transmission line corridor are determined using the following methods:

[0103] When a person insulated from ground touches a grounded metal body without experiencing an unacceptable transient electric shock under a preset probability and the transient discharge charge is less than 3 μC, determine the control value curve of the AC / DC mixed electric field along the edge of the transmission line corridor, including:

[0104]

[0105]

[0106]

[0107] When a person with good grounding touches an insulated metal object and experiences no unacceptable transient electric shock under a preset probability, and the transient discharge charge is less than 3 μC, determine the control value curve of the AC / DC mixed electric field along the edge of the transmission line corridor, including:

[0108]

[0109]

[0110]

[0111]

[0112] Among them, E DC E is the absolute value of the DC electric field intensity. AC denoted as the effective value of the power frequency electric field strength, and p is the probability that no unacceptable sensations occurred during the experiment.

[0113] Preferably, wherein

[0114] For main conductors, when transmission lines pass through non-residential areas, E AC The value is less than or equal to 10 kV / m, E DC The value should be less than or equal to 30 kV / m;

[0115] For main conductors, when transmission lines pass through residential areas, E AC The value is less than or equal to 7kV / m, E DC The value is less than or equal to 25 kV / m;

[0116] For wet conductors, when the transmission line passes through a non-residential area, E AC The value is less than or equal to 10 kV / m, E DC The value is less than or equal to 36 kV / m;

[0117] For wet conductors, when the transmission line passes through a residential area, E AC The value is less than or equal to 7kV / m, E DC The value should be less than or equal to 30 kV / m;

[0118] When a person insulated from the ground touches a grounded metal body and does not experience an unacceptable transient electric shock, E AC The value is less than or equal to 4kV / m, E DC The value should be less than or equal to 15 kV / m;

[0119] When a person insulated from the ground touches a grounded metal body and does not experience an unacceptable transient electric shock, E AC The value is less than or equal to 4kV / m, E DC The value is less than or equal to 15 kV / m.

[0120] Preferably, the matching unit determines the relationship curve between the target power frequency electric field strength and the DC electric field strength using the following method:

[0121] In direct perception experiments, under different probabilities of no unacceptable direct perception, the relationship curves between the target power frequency electric field strength and the DC electric field strength are determined, including:

[0122] E DC =0.2108E 2 AC –4.8002E AC +29.658, p=95%,

[0123] E DC =0.2077E 2 AC -4.9820E AC +32.497, p=90%,

[0124] E DC =0.2024E 2 AC -5.0327E AC +34.096, p=85%,

[0125] E DC =0.2024E 2 AC -5.1145E AC +35.450, p=80%,

[0126] E DC =0.1994E 2 AC -5.1369E AC +36.496, p=75%,

[0127] E DC =0.1893E 2 AC -5.0582E AC +37.121, p=70%,

[0128] In a test where a person insulated from ground touches a grounded metal body, the relationship curves between the target power frequency electric field strength and the DC electric field strength are determined under different probabilities of not experiencing an unacceptable transient electric shock, including:

[0129] E DC = -1.1684E 2 AC +1.3033E AC +12.8537, p=95%,

[0130] E DC = -0.9945E 2 AC +0.3446E AC +14.9979, p=90%,

[0131] E DC = -0.8051E 2 AC –0.6334E AC +16.9111, p=85%,

[0132] E DC = -0.6198E 2 AC –1.5673E AC +18.6555, p=80%,

[0133] E DC = -0.4425E 2 AC –2.4492E AC +20.2689, p=75%,

[0134] E DC = -0.2737E 2 AC –3.2814E AC +21.7765, p=70%,

[0135] In a well-grounded human touching an insulated metal object, the relationship curves between the target power frequency electric field strength and the DC electric field strength were determined under different probabilities of not experiencing an unacceptable transient electric shock, including:

[0136] E DC = -1.0232E 2 AC +0.7694E AC +12.1193, p=95%,

[0137] E DC= -0.9648E 2 AC +0.2733E AC +13.5256, p=90%,

[0138] E DC = -0.9295E 2 AC –0.02027E AC +14.5332, p=85%,

[0139] E DC = -0.9083E 2 AC –0.2026E AC +15.3528, p=80%,

[0140] E DC = -0.8990E 2 AC –0.3010E AC +16.0545, p=75%,

[0141] E DC = -0.9025E 2 AC -0.3195E AC +16.6711, p=70%,

[0142] Among them, E DC E is the absolute value of the DC electric field intensity. AC denoted as the effective value of the power frequency electric field strength, and p is the probability that no unacceptable sensations occurred during the experiment.

[0143] This invention provides a method and system for determining the control values ​​of a mixed electric field for parallel AC / DC transmission lines, comprising: acquiring demand parameter information of the AC and DC transmission lines to be constructed; matching the control value curve of the mixed electric field of the transmission lines and the relationship curve between the power frequency electric field intensity and the DC electric field intensity based on the demand parameter information, to determine the control value curve of the target mixed electric field and the relationship curve between the target power frequency electric field intensity and the DC electric field intensity; determining the control value of the mixed electric field based on the control value curve of the mixed electric field and the relationship curve between the target power frequency electric field intensity and the DC electric field intensity; wherein, the control value of the mixed electric field includes: the absolute value of the DC electric field intensity and the effective value of the power frequency electric field intensity. Based on the sample distribution in the sensory test, this invention derives the AC / DC mixed electric field relationship curves when the samples do not exhibit unacceptable sensations under different probabilities. When designing AC / DC transmission lines to be erected in parallel on the same tower or along the same corridor, the method of this invention can be adopted to ensure that the ground mixed electric field of the parallel AC / DC lines is below this control value curve, so that people moving under the line will not experience unacceptable direct sensations, nor will people in residential buildings along the corridor experience unacceptable transient electric shock sensations. The line can be precisely controlled under the premise of environmental protection. Attached Figure Description

[0144] Exemplary embodiments of the present invention can be more fully understood by referring to the following figures:

[0145] Figure 1 A flowchart of a method 100 for determining the control value of a mixed electric field of parallel AC / DC transmission lines according to an embodiment of the present invention;

[0146] Figure 2 This is a schematic diagram of the structure of a system 200 for determining the control value of a mixed electric field of parallel AC / DC transmission lines according to an embodiment of the present invention. Detailed Implementation

[0147] Exemplary embodiments of the invention will now be described with reference to the accompanying drawings. However, the invention may be embodied in many different forms and is not limited to the embodiments described herein. These embodiments are provided to fully and completely disclose the invention and to fully convey its scope to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the drawings is not intended to limit the invention. In the drawings, the same units / elements are referred to by the same reference numerals.

[0148] Unless otherwise stated, the terms used herein (including technical terms) have their common meaning as understood by one of ordinary skill in the art. Furthermore, it is understood that terms defined in commonly used dictionaries should be understood to have a meaning consistent with the context of their relevant field, and not to be interpreted as having an idealized or overly formal meaning.

[0149] The purpose of this invention is to provide a method for determining the design control values ​​of the mixed electric field of parallel AC / DC transmission lines, which can serve as design conditions for AC / DC transmission lines erected in the same corridor or on the same tower. Under these design conditions, measures are taken to determine important parameters such as minimum conductor height, proximity distance, and corridor width. This method is derived from fitting human perception test data and can effectively control the perception of people moving under the transmission line to an acceptable level, which is of great significance for reducing engineering complaints and saving line investment.

[0150] Figure 1 This is a flowchart of a method 100 for determining the mixed electric field control values ​​of parallel AC / DC transmission lines according to an embodiment of the present invention. Figure 1 As shown, the method for determining the control value of the mixed electric field of parallel AC / DC transmission lines provided by the embodiments of the present invention, based on the sample distribution in the perception test, derives the AC / DC mixed electric field relationship curves when the samples do not exhibit unacceptable sensations under different probabilities. When designing parallel AC / DC transmission lines on the same tower or in the same corridor, the method of the present invention can be adopted to ensure that the ground mixed electric field of the parallel AC / DC transmission lines, when below this control value curve, will not cause unacceptable direct sensations for people moving under the line, nor will it cause unacceptable transient electric shock sensations for people moving in houses along the corridor. The method 100 for determining the control value of the mixed electric field of parallel AC / DC transmission lines provided by the embodiments of the present invention begins at step 101, in which the required parameter information of the AC and DC transmission lines to be erected is obtained.

[0151] Preferably, the required parameter information includes: test type, probability of no unacceptable experience during the test, conductor type, type of area traversed by the transmission line, and whether it is the edge of a line corridor.

[0152] In step 102, based on the demand parameter information, the control value curve of the hybrid electric field of the transmission line and the relationship curve between the power frequency electric field strength and the DC electric field strength are matched respectively to determine the control value curve of the target hybrid electric field and the relationship curve between the target power frequency electric field strength and the DC electric field strength.

[0153] Preferably, the control value curve of the target mixed electric field includes: the control value curve of the AC / DC mixed electric field under the line and the control value curve of the AC / DC mixed electric field along the edge of the transmission line corridor;

[0154] The control value curve of the offline hybrid electric field is determined using the following methods:

[0155] For main conductors, when the transmission line passes through a non-residential area, the control value curve of the AC / DC hybrid electric field under the line is determined as follows:

[0156]

[0157]

[0158]

[0159]

[0160] For main conductors, when the transmission line passes through a residential area, the control value curve of the AC / DC hybrid electric field under the line is determined as follows:

[0161]

[0162]

[0163]

[0164]

[0165] For wet conductors, when the transmission line passes through a non-residential area, the control value curve for the AC / DC hybrid electric field under the line is determined as follows:

[0166]

[0167]

[0168]

[0169]

[0170] For wet conductors, when the transmission line passes through a residential area, the control value curve of the AC / DC mixed electric field under the line is determined as follows:

[0171]

[0172]

[0173]

[0174]

[0175] The control value curves of the AC / DC hybrid electric field along the edge of the transmission line corridor are determined using the following methods:

[0176] When a person insulated from ground touches a grounded metal body without experiencing an unacceptable transient electric shock under a preset probability and the transient discharge charge is less than 3 μC, determine the control value curve of the AC / DC mixed electric field along the edge of the transmission line corridor, including:

[0177]

[0178]

[0179]

[0180] When a person with good grounding touches an insulated metal object and experiences no unacceptable transient electric shock under a preset probability, and the transient discharge charge is less than 3 μC, determine the control value curve of the AC / DC mixed electric field along the edge of the transmission line corridor, including:

[0181]

[0182]

[0183]

[0184]

[0185] Among them, E DC E is the absolute value of the DC electric field intensity. AC denoted as the effective value of the power frequency electric field strength, and p is the probability that no unacceptable sensations occurred during the experiment.

[0186] Preferably, for the main conductor, when the transmission line passes through a non-residential area, E AC The value is less than or equal to 10 kV / m, E DC The value should be less than or equal to 30 kV / m;

[0187] For main conductors, when transmission lines pass through residential areas, E AC The value is less than or equal to 7kV / m, E DC The value is less than or equal to 25 kV / m;

[0188] For wet conductors, when the transmission line passes through a non-residential area, E AC The value is less than or equal to 10 kV / m, E DC The value is less than or equal to 36 kV / m;

[0189] For wet conductors, when the transmission line passes through a residential area, E AC The value is less than or equal to 7kV / m, E DC The value should be less than or equal to 30 kV / m;

[0190] When a person insulated from the ground touches a grounded metal body and does not experience an unacceptable transient electric shock, E AC The value is less than or equal to 4kV / m, E DC The value should be less than or equal to 15 kV / m;

[0191] When a person insulated from the ground touches a grounded metal body and does not experience an unacceptable transient electric shock, E AC The value is less than or equal to 4kV / m, E DC The value is less than or equal to 15 kV / m.

[0192] Preferably, the method determines the relationship curve between the target power frequency electric field strength and the DC electric field strength using the following method:

[0193] In direct perception experiments, under different probabilities of no unacceptable direct perception, the relationship curves between the target power frequency electric field strength and the DC electric field strength are determined, including:

[0194] E DC =0.2108E 2 AC –4.8002E AC +29.658, p=95%,

[0195] E DC =0.2077E 2 AC -4.9820E AC +32.497, p=90%,

[0196] E DC =0.2024E 2 AC -5.0327E AC +34.096, p=85%,

[0197] E DC =0.2024E 2 AC -5.1145E AC +35.450, p=80%,

[0198] E DC =0.1994E 2 AC -5.1369E AC +36.496, p=75%,

[0199] E DC =0.1893E 2 AC -5.0582E AC +37.121, p=70%,

[0200] In a test where a person insulated from ground touches a grounded metal body, the relationship curves between the target power frequency electric field strength and the DC electric field strength are determined under different probabilities of not experiencing an unacceptable transient electric shock, including:

[0201] E DC = -1.1684E 2 AC +1.3033E AC +12.8537, p=95%,

[0202] E DC = -0.9945E 2 AC +0.3446E AC +14.9979, p=90%,

[0203] E DC = -0.8051E 2 AC –0.6334E AC +16.9111, p=85%,

[0204] E DC = -0.6198E 2 AC –1.5673E AC +18.6555, p=80%,

[0205] E DC = -0.4425E 2 AC –2.4492E AC +20.2689, p=75%,

[0206] E DC = -0.2737E 2 AC –3.2814E AC +21.7765, p=70%,

[0207] In a well-grounded human touching an insulated metal object, the relationship curves between the target power frequency electric field strength and the DC electric field strength were determined under different probabilities of not experiencing an unacceptable transient electric shock, including:

[0208] E DC = -1.0232E 2 AC +0.7694E AC +12.1193, p=95%,

[0209] E DC= -0.9648E 2 AC +0.2733E AC +13.5256, p=90%,

[0210] E DC = -0.9295E 2 AC –0.02027E AC +14.5332, p=85%,

[0211] E DC = -0.9083E 2 AC –0.2026E AC +15.3528, p=80%,

[0212] E DC = -0.8990E 2 AC –0.3010E AC +16.0545, p=75%,

[0213] E DC = -0.9025E 2 AC -0.3195E AC +16.6711, p=70%,

[0214] Among them, E DC E is the absolute value of the DC electric field intensity. AC denoted as the effective value of the power frequency electric field strength, and p is the probability that no unacceptable sensations occurred during the experiment.

[0215] In step 103, the control value of the mixed electric field is determined based on the control value curve of the mixed electric field and the relationship curve between the target power frequency electric field strength and the DC electric field strength; wherein, the control value of the mixed electric field includes: the absolute value of the DC electric field strength and the effective value of the power frequency electric field strength.

[0216] In this invention, by acquiring different experimental data and performing fitting analysis, the control value curves of the mixed electric field under different conditions, as well as the relationship curves between the power frequency electric field strength and the DC electric field strength, can be obtained. When it is necessary to design control values, matching can be performed.

[0217] Therefore, in this invention, the first step is to obtain the required parameter information for the AC and DC transmission lines to be erected, including: the test type, the probability of no unacceptable phenomena occurring during the test, the conductor type, the type of area the transmission line passes through, and whether it is the edge of a line corridor. Then, the control value curve of the mixed electric field and the relationship curve between the target power frequency electric field strength and the DC electric field strength are determined. Based on the control value curve of the mixed electric field and the relationship curve between the target power frequency electric field strength and the DC electric field strength, the control value of the mixed electric field is determined.

[0218] In this invention, the control value of the ground mixed electric field under parallel AC and DC transmission lines is determined by fitting the results of direct perception tests under different AC and DC electric field ratios and values. That is, when a person enters the AC and DC mixed electric field, he feels the stimulation of the electric field on his body parts such as hair, cheeks, and arms, and the perception level is recorded and statistically analyzed.

[0219] In the direct perception test, the relationship curves between the power frequency electric field strength and the DC electric field strength when the test samples did not exhibit unacceptable direct perception at probabilities of 95%, 90%, 85%, 80%, 75%, and 70% are as follows:

[0220] E DC = 0.2108E 2 AC – 4.8002E AC + 29.658, p = 95% (1)

[0221] E DC = 0.2077E 2 AC – 4.9820E AC + 32.497, p = 90% (2)

[0222] E DC = 0.2024E 2 AC - 5.0327E AC + 34.096, p = 85% (3)

[0223] E DC = 0.2024E 2 AC - 5.1145E AC + 35.450, p = 80% (4)

[0224] E DC =0.1994E 2 AC -5.1369E AC+36.496, p = 75% (5)

[0225] E DC =0.1893E 2 AC -5.0582E AC +37.121, p = 70% (6)

[0226] Among them, E DC E is the absolute value of the DC electric field intensity. AC denoted as the effective value of the power frequency electric field intensity, and p is the probability that the human body will not experience any obvious sensation.

[0227] In the case of main conductors, if the principle for determining the control value of the AC / DC hybrid electric field under the transmission line is selected to ensure that people do not experience significant direct sensations under probabilities of 95%, 90%, 85%, and 80%, and this is consistent with existing standards for separate AC and DC lines, then the control value curves of the AC / DC hybrid electric field under the transmission line when passing through non-residential areas can be written as follows:

[0228]

[0229]

[0230]

[0231]

[0232] In the above formula, E AC E DC The unit is kV / m. E AC The value must not exceed 10kV / m, E DC The value must not exceed 30kV / m.

[0233] In the case of a dry conductor, the control curves of the AC / DC mixed electric field under the transmission line when it passes through a residential area can be written as follows:

[0234]

[0235]

[0236]

[0237]

[0238] In the above formula, E AC E DC The unit is kV / m. E AC The value must not exceed 7kV / m, E DC The value must not exceed 25kV / m.

[0239] The control values ​​for AC / DC hybrid electric fields in residential areas should be higher than those in non-residential areas.

[0240] In the case of wet conductors, if the principle for determining the control value of the AC / DC hybrid electric field under the transmission line is selected to ensure that people do not experience unacceptable direct sensations with probabilities of 95%, 90%, 85%, and 80%, and this is consistent with existing standards for separate AC and DC lines, then the control value curves of the AC / DC hybrid electric field under the transmission line when passing through non-residential areas can be written as follows:

[0241]

[0242]

[0243]

[0244]

[0245] In the above formula, E AC E DC The unit is kV / m. E AC The value must not exceed 10kV / m, E DC The value must not exceed 36kV / m.

[0246] When the conductor is wet, the control curves of the AC / DC mixed electric field under the transmission line when it passes through a residential area can be written as follows:

[0247]

[0248]

[0249]

[0250]

[0251] In the above formula, E AC E DC The unit is kV / m. E AC The value must not exceed 7kV / m, E DC The value must not exceed 30kV / m.

[0252] The control values ​​for AC / DC hybrid electric fields in residential areas should be higher than those in non-residential areas, and the control values ​​for both dry and wet conductors should be met simultaneously.

[0253] In this invention, the determination of the control value of the mixed electric field on the ground along the edge of the corridor of parallel AC and DC transmission lines is obtained by fitting the results of human transient electric shock perception test under different AC and DC electric field ratios and values. The human transient electric shock perception test mainly considers the test of a person insulated from the ground touching a grounded metal body and the test of a person with good grounding touching a grounded metal body, and it is necessary to verify whether the transient electric shock discharge charge in the test is less than 3μC.

[0254] In the test of a person touching a grounded metal body with insulated surfaces, the power frequency electric field strength and DC electric field strength curves for the test samples when no unacceptable transient electric shock sensation was observed with probabilities of 95%, 90%, 85%, 80%, 75%, and 70% were respectively...

[0255] E DC = -1.1684E 2 AC + 1.3033E AC + 12.8537, p = 95% (23)

[0256] E DC = -0.9945E 2 AC + 0.3446E AC + 14.9979, p = 90% (24)

[0257] E DC = -0.8051E 2 AC – 0.6334E AC + 16.9111, p = 85% (25)

[0258] E DC = -0.6198E 2 AC –1.5673E AC + 18.6555, p = 80% (26)

[0259] E DC = -0.4425E 2 AC – 2.4492E AC + 20.2689, p = 75% (27)

[0260] E DC = -0.2737E 2 AC –3.2814E AC + 21.7765, p = 70% (28)

[0261] In the test of a person touching an insulated metal object to the ground with good grounding, the relationship curves between the power frequency electric field strength and the DC electric field strength when the test sample did not experience an unacceptable transient electric shock sensation at probabilities of 95%, 90%, 85%, 80%, 75%, and 70% are as follows:

[0262] E DC = -1.0232E 2 AC + 0.7694E AC + 12.1193, p = 95% (29)

[0263] E DC = -0.9648E 2 AC + 0.2733E AC + 13.5256, p = 90% (30)

[0264] E DC = -0.9295E 2 AC – 0.02027E AC + 14.5332, p = 85% (31)

[0265] E DC = -0.9083E 2 AC –0.2026E AC + 15.3528, p = 80% (32)

[0266] E DC = -0.8990E 2 AC – 0.3010E AC + 16.0545, p = 75% (33)

[0267] E DC = -0.9025E 2 AC -0.3195E AC + 16.6711, p = 70% (34)

[0268] Among them, after verifying that the transient electric shock discharge charge is less than 3μC, the principle for formulating the control value of the AC / DC mixed electric field at the edge of the transmission line corridor can be selected as ensuring that no unacceptable transient electric shock sensation occurs when a person insulated from the ground touches a grounded metal body with a probability of 95%, 90%, and 85%, and connecting with existing standards for separate AC lines and separate DC lines. Then, the control value curves of the AC / DC mixed electric field at the edge of the transmission line corridor can be as follows:

[0269]

[0270]

[0271]

[0272] In the above formula, E AC E DC The unit is kV / m. E AC The value must not exceed 4kV / m, E DC The value must not exceed 15kV / m.

[0273] Among them, after verifying that the transient electric shock discharge charge is less than 3μC, the principle for formulating the control value of the AC / DC mixed electric field at the edge of the transmission line corridor can be selected as ensuring that no unacceptable transient electric shock sensation occurs when a person with good grounding touches an insulated metal body to ground with a probability of 95%, 90%, 85%, and 80%, and connecting with existing standards for separate AC lines and separate DC lines. Then, the control value curves of the AC / DC mixed electric field at the edge of the transmission line corridor can be as follows:

[0274]

[0275]

[0276]

[0277]

[0278] In the above formula, E AC E DC The unit is kV / m. E AC The value must not exceed 4kV / m, E DC The value must not exceed 15kV / m.

[0279] For example, in the design of parallel AC / DC lines, when the line passes through non-residential areas, it is desirable that more than 80% of the people under the line will not experience unacceptable direct sensations. Therefore, equation (10) is selected as the AC / DC mixed electric field control value for the case of dry conductors, and equation (18) is selected as the AC / DC mixed electric field control value for the case of wet conductors, that is:

[0280] (1) In the case of main conductors in non-residential areas: E AC The value should not exceed 10kV / m, E DC The value should not exceed 30kV / m.

[0281] (2) In the case of wet conductors in non-residential areas: E AC The value should not exceed 10kV / m, E DC The value should not exceed 36kV / m.

[0282] When the line passes through a residential area, the level of the AC / DC mixed electric field should be lower than that in non-residential areas. This ensures that over 90% of people do not experience unacceptable direct electric field disturbances. Therefore, equation (12) is chosen as the control value for the AC / DC mixed electric field under dry conductor conditions, and equation (20) is chosen as the control value for the AC / DC mixed electric field under wet conductor conditions.

[0283] (3) In the case of main power lines in residential areas: E AC The value should not exceed 7kV / m, E DC The value should not exceed 25kV / m.

[0284] (4) In the case of wet conductors in residential areas: E AC The value should not exceed 7kV / m, E DC The value should not exceed 25kV / m.

[0285] Along the edge of the line corridor, considering the more common situations, it is possible to select a value that ensures over 90% of people will not experience unacceptable transient electric shock when touching a grounded metal body. Therefore, equation (36) is chosen as the AC / DC hybrid electric field control value for the corridor edge, i.e.:

[0286] (5) E AC The value should not exceed 4kV / m, E DC The value should not exceed 15kV / m.

[0287] The control values ​​of the AC / DC hybrid electric field for parallel AC / DC line design can be determined by the formulas in (1)-(5) above.

[0288] Figure 2 This is a schematic diagram of the structure of a system 200 for determining the control values ​​of a mixed electric field in parallel AC / DC transmission lines according to an embodiment of the present invention. Figure 2 As shown, the system 200 for determining the control value of the mixed electric field of parallel AC / DC transmission lines provided by the present invention includes: a demand parameter information acquisition unit 201, a matching unit 202, and a mixed electric field control value determination unit 203.

[0289] Preferably, the demand parameter information acquisition unit 201 is used to acquire the demand parameter information of the AC and DC transmission lines to be erected.

[0290] Preferably, the required parameter information includes: test type, probability of no direct perception during the test, conductor type, type of area traversed by the transmission line, and whether it is the edge of a line corridor.

[0291] Preferably, the matching unit 202 is used to match the control value curve of the hybrid electric field of the transmission line and the relationship curve between the power frequency electric field strength and the DC electric field strength based on the demand parameter information, so as to determine the control value curve of the target hybrid electric field and the relationship curve between the target power frequency electric field strength and the DC electric field strength.

[0292] Preferably, in the matching unit, the control value curve of the target mixed electric field includes: the control value curve of the AC / DC mixed electric field under the line and the control value curve of the AC / DC mixed electric field along the edge of the transmission line corridor;

[0293] The control value curve of the offline hybrid electric field is determined using the following methods:

[0294] For main conductors, when the transmission line passes through a non-residential area, the control value curve of the AC / DC hybrid electric field under the line is determined as follows:

[0295]

[0296]

[0297]

[0298]

[0299] For main conductors, when the transmission line passes through a residential area, the control value curve of the AC / DC hybrid electric field under the line is determined as follows:

[0300]

[0301]

[0302]

[0303]

[0304] For wet conductors, when the transmission line passes through a non-residential area, the control value curve for the AC / DC hybrid electric field under the line is determined as follows:

[0305]

[0306]

[0307]

[0308]

[0309] For wet conductors, when the transmission line passes through a residential area, the control value curve of the AC / DC mixed electric field under the line is determined as follows:

[0310]

[0311]

[0312]

[0313]

[0314] The control value curves of the AC / DC hybrid electric field along the edge of the transmission line corridor are determined using the following methods:

[0315] When a person insulated from ground touches a grounded metal body without experiencing an unacceptable transient electric shock under a preset probability and the transient discharge charge is less than 3 μC, determine the control value curve of the AC / DC mixed electric field along the edge of the transmission line corridor, including:

[0316]

[0317]

[0318]

[0319] When a person with good grounding touches an insulated metal object and does not experience a transient electric shock under a preset probability, and the transient discharge charge is less than 3 μC, determine the control value curve of the AC / DC mixed electric field along the edge of the transmission line corridor, including:

[0320]

[0321]

[0322]

[0323]

[0324] Among them, E DC E is the absolute value of the DC electric field intensity. AC denoted as the effective value of the power frequency electric field strength, and p is the probability that no unacceptable sensations occurred during the experiment.

[0325] Preferably, for the main conductor, when the transmission line passes through a non-residential area, the EAC value is less than or equal to 10kV / m, and the EDC value is less than or equal to 30kV / m.

[0326] For main conductors, when transmission lines pass through residential areas, E AC The value is less than or equal to 7kV / m, E DC The value is less than or equal to 25 kV / m;

[0327] For wet conductors, when the transmission line passes through a non-residential area, E AC The value is less than or equal to 10 kV / m, E DC The value is less than or equal to 36 kV / m;

[0328] For wet conductors, when the transmission line passes through a residential area, E AC The value is less than or equal to 7kV / m, E DC The value should be less than or equal to 30 kV / m;

[0329] When a person insulated from the ground touches a grounded metal body and does not experience an unacceptable transient electric shock, E AC The value is less than or equal to 4kV / m, E DC The value should be less than or equal to 15 kV / m;

[0330] When a person insulated from the ground touches a grounded metal body and does not experience an unacceptable transient electric shock, E AC The value is less than or equal to 4kV / m, E DC The value is less than or equal to 15 kV / m.

[0331] Preferably, the matching unit determines the relationship curve between the target power frequency electric field strength and the DC electric field strength using the following method:

[0332] In direct perception experiments, under different probabilities of no unacceptable direct perception, the relationship curves between the target power frequency electric field strength and the DC electric field strength are determined, including:

[0333] E DC =0.2108E 2 AC –4.8002E AC +29.658, p=95%,

[0334] E DC =0.2077E 2 AC -4.9820E AC +32.497, p=90%,

[0335] E DC =0.2024E 2AC -5.0327E AC +34.096, p=85%,

[0336] E DC =0.2024E 2 AC -5.1145E AC +35.450, p=80%,

[0337] E DC =0.1994E 2 AC -5.1369E AC +36.496, p=75%,

[0338] E DC =0.1893E 2 AC -5.0582E AC +37.121, p=70%,

[0339] In a test where a person insulated from ground touches a grounded metal body, the relationship curves between the target power frequency electric field strength and the DC electric field strength are determined under different probabilities of not experiencing an unacceptable transient electric shock, including:

[0340] E DC = -1.1684E 2 AC +1.3033E AC +12.8537, p=95%,

[0341] E DC = -0.9945E 2 AC +0.3446E AC +14.9979, p=90%,

[0342] E DC = -0.8051E 2 AC –0.6334E AC +16.9111, p=85%,

[0343] E DC = -0.6198E 2 AC –1.5673E AC +18.6555, p=80%,

[0344] E DC = -0.4425E 2 AC –2.4492EAC +20.2689, p=75%,

[0345] E DC = -0.2737E 2 AC –3.2814E AC +21.7765, p=70%,

[0346] In a well-grounded human touching an insulated metal object, the relationship curves between the target power frequency electric field strength and the DC electric field strength were determined under different probabilities of not experiencing an unacceptable transient electric shock, including:

[0347] E DC = -1.0232E 2 AC +0.7694E AC +12.1193, p=95%,

[0348] E DC = -0.9648E 2 AC +0.2733E AC +13.5256, p=90%,

[0349] E DC = -0.9295E 2 AC –0.02027E AC +14.5332, p=85%,

[0350] E DC = -0.9083E 2 AC –0.2026E AC +15.3528, p=80%,

[0351] E DC = -0.8990E 2 AC –0.3010E AC +16.0545, p=75%,

[0352] E DC = -0.9025E 2 AC -0.3195E AC +16.6711, p=70%,

[0353] Among them, E DC E is the absolute value of the DC electric field intensity. AC denoted as the effective value of the power frequency electric field strength, and p is the probability that no unacceptable sensations occurred during the experiment.

[0354] Preferably, the mixed electric field control value determination unit 203 is used to determine the mixed electric field control value based on the control value curve of the mixed electric field and the relationship curve between the target power frequency electric field strength and the DC electric field strength; wherein, the mixed electric field control value includes: the absolute value of the DC electric field strength and the effective value of the power frequency electric field strength.

[0355] The system 200 for determining the mixed electric field control value of parallel AC / DC transmission lines in an embodiment of the present invention corresponds to the method 100 for determining the mixed electric field control value of parallel AC / DC transmission lines in another embodiment of the present invention, and will not be described again here.

[0356] The invention has been described with reference to a few embodiments. However, as will be known to those skilled in the art, and as defined in the appended claims, other embodiments besides those disclosed above fall equivalently within the scope of the invention.

[0357] Generally, all terms used in the claims are to be interpreted according to their ordinary meaning in the art, unless otherwise expressly defined herein. All references to “a / the / the [device, component, etc.]” ​​are openly interpreted as at least one instance of said device, component, etc., unless otherwise expressly stated. The steps of any method disclosed herein need not be performed in the exact order disclosed unless explicitly stated otherwise.

[0358] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can 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, etc.) containing computer-usable program code.

[0359] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can 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, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0360] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0361] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0362] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A method of determining a parallel erection AC-DC hybrid transmission line mixed electric field control value, characterized by, The method includes: Obtain the required parameters for the AC and DC transmission lines to be erected; Based on the aforementioned demand parameter information, the control value curve of the hybrid electric field of the transmission line and the relationship curve between the power frequency electric field strength and the DC electric field strength are matched respectively to determine the control value curve of the target hybrid electric field and the relationship curve between the target power frequency electric field strength and the DC electric field strength. The control value of the mixed electric field is determined based on the control value curve of the mixed electric field and the relationship curve between the target power frequency electric field strength and the DC electric field strength; wherein, the control value of the mixed electric field includes: the absolute value of the DC electric field strength and the effective value of the power frequency electric field strength; The required parameter information includes: test type, probability of no unacceptable experience during the test, conductor type, type of area through which the transmission line passes, and whether it is the edge of a line corridor.

2. The method according to claim 1, characterized in that, The control value curves of the target mixed electric field include: the control value curves of the AC / DC mixed electric field under the line and the control value curves of the AC / DC mixed electric field along the edge of the transmission line corridor; The control value curve of the offline hybrid electric field is determined using the following methods: For main conductors, when the transmission line passes through a non-residential area, the control value curve of the AC / DC hybrid electric field under the line is determined as follows: , p =95% ， , p =90% ， , p =85% ， , p =80% ， For main conductors, when the transmission line passes through a residential area, the control value curve of the AC / DC hybrid electric field under the line is determined as follows: , p =95% ， , p =90% ， , p =85% ， , p =80% ， For wet conductors, when the transmission line passes through a non-residential area, the control value curve for the AC / DC hybrid electric field under the line is determined as follows: , p =95% ， , p =90% ， , p =85% ， , p =80% ， For wet conductors, when the transmission line passes through a residential area, the control value curve for the AC / DC hybrid electric field under the line is determined as follows: , p =95% ， , p =90% ， , p =85%， , p =80% ， The control value curves of the AC / DC hybrid electric field along the edge of the transmission line corridor are determined using the following methods: When a person insulated from ground touches a grounded metal body without experiencing an unacceptable transient electric shock under a preset probability and the transient discharge charge is less than 3 μC, determine the control value curve of the AC / DC mixed electric field along the edge of the transmission line corridor, including: , p =95% ， , p =90% ， , p =85% ， The control value curves for the AC / DC mixed electric field along the edge of the transmission line corridor are determined when, under a preset probability, a person touching a grounded insulated metal object does not experience an unacceptable transient electric shock and the transient discharge charge is less than 3 μC. This includes: , p =95% ， , p =90% ， , p =85% ， , p =80% ， in, E DC The absolute value of the DC electric field strength. E AC This is the effective value of the power frequency electric field strength. p This represents the probability that no unacceptable feelings occurred during the experiment.

3. The method according to claim 2, characterized in that, For trunk conductors, when transmission lines pass through non-residential areas... E AC The value is less than or equal to 10 kV / m. E DC The value should be less than or equal to 30 kV / m; for When the main conductor or power transmission line passes through a residential area, E AC The value is less than or equal to 7kV / m. E DC The value should be less than or equal to 25 kV / m; For wet conductors, when power transmission lines pass through non-residential areas... E AC The value is less than or equal to 10 kV / m. E DC The value is less than or equal to 36 kV / m; for Wet conductors, when power transmission lines pass through residential areas, E AC The value is less than or equal to 7kV / m. E DC The value should be less than or equal to 30 kV / m; When a person insulated from the ground touches a grounded metal object, they do not experience an unacceptable transient electric shock. E AC The value is less than or equal to 4kV / m. E DC The value should be less than or equal to 15 kV / m; When a person insulated from the ground touches a grounded metal object, they do not experience an unacceptable transient electric shock. E AC The value is less than or equal to 4kV / m. E DC The value is less than or equal to 15 kV / m.

4. The method according to claim 1, characterized in that, The method determines the relationship curve between the target power frequency electric field strength and the DC electric field strength using the following methods: In direct perception experiments, under different probabilities of no unacceptable direct perception, the relationship curves between the target power frequency electric field strength and the DC electric field strength are determined, including: E DC = 0.2108 E 2 AC – 4.8002 E AC + 29.658, p =95% ， E DC = 0.2077 E 2 AC – 4.9820 E AC + 32.497, p =90% ， E DC = 0.2024 E 2 AC - 5.0327 E AC + 34.096, p =85% ， E DC = 0.2024 E 2 AC - 5.1145 E AC + 35.450, p =80% ， E DC = 0.1994 E 2 AC - 5.1369 E AC + 36.496, p =75% ， E DC = 0.1893 E 2 AC - 5.0582 E AC + 37.121, p =70% ， In a test where a person insulated from ground touches a grounded metal body, the relationship curves between the target power frequency electric field strength and the DC electric field strength are determined under different probabilities of not experiencing an unacceptable transient electric shock, including: E DC = -1.1684 E 2 AC + 1.3033 E AC + 12.8537, p =95% ， E DC = -0.9945 E 2 AC + 0.3446 E AC + 14.9979, p =90% ， E DC = -0.8051 E 2 AC – 0.6334 E AC + 16.9111, p =85% ， E DC = -0.6198 E 2 AC – 1.5673 E AC + 18.6555, p =80%， E DC = -0.4425 E 2 AC – 2.4492 E AC + 20.2689, p =75% ， E DC = -0.2737 E 2 AC – 3.2814 E AC + 21.7765, p =70% ， In a well-grounded human touching an insulated metal object, the relationship curves between the target power frequency electric field strength and the DC electric field strength were determined under different probabilities of not experiencing an unacceptable transient electric shock, including: E DC = -1.0232 E 2 AC + 0.7694 E AC + 12.1193, p =95% ， E DC = -0.9648 E 2 AC + 0.2733 E AC + 13.5256, p =90%， E DC = -0.9295 E 2 AC – 0.02027 E AC + 14.5332, p =85% ， E DC = -0.9083 E 2 AC – 0.2026 E AC + 15.3528, p =80% ， E DC = -0.8990 E 2 AC – 0.3010 E AC + 16.0545, p =75% ， E DC = -0.9025 E 2 AC – 0.3195 E AC + 16.6711, p =70% ， in, E DC The absolute value of the DC electric field strength. E AC This is the effective value of the power frequency electric field strength. p This represents the probability that no unacceptable feelings occurred during the experiment.

5. A system for determining the control values ​​of the mixed electric field of parallel AC / DC transmission lines, characterized in that, The system includes: The demand parameter information acquisition unit is used to acquire the demand parameter information of the AC and DC transmission lines to be erected; The matching unit is used to match the control value curve of the hybrid electric field of the transmission line and the relationship curve between the power frequency electric field strength and the DC electric field strength based on the demand parameter information, so as to determine the control value curve of the target hybrid electric field and the relationship curve between the target power frequency electric field strength and the DC electric field strength. A hybrid electric field control value determination unit is used to determine hybrid electric field control values ​​based on the control value curve of the hybrid electric field and the relationship curve between the target power frequency electric field strength and the DC electric field strength; wherein, the hybrid electric field control values ​​include: the absolute value of the DC electric field strength and the effective value of the power frequency electric field strength; The required parameter information includes: test type, probability of no unacceptable experience during the test, conductor type, type of area through which the transmission line passes, and whether it is the edge of a line corridor.

6. The system according to claim 5, characterized in that, In the matching unit, the control value curve of the target mixed electric field includes: the control value curve of the AC / DC mixed electric field under the line and the control value curve of the AC / DC mixed electric field along the edge of the transmission line corridor; The control value curve of the offline hybrid electric field is determined using the following methods: For main conductors, when the transmission line passes through a non-residential area, the control value curve of the AC / DC hybrid electric field under the line is determined as follows: , p =95% ， , p =90% ， , p =85% ， , p =80% ， For main conductors, when the transmission line passes through a residential area, the control value curve of the AC / DC hybrid electric field under the line is determined as follows: , p =95% ， , p =90% ， , p =85% ， , p =80% ， For wet conductors, when the transmission line passes through a non-residential area, the control value curve for the AC / DC hybrid electric field under the line is determined as follows: , p =95% ， , p =90% ， , p =85% ， , p =80% ， For wet conductors, when the transmission line passes through a residential area, the control value curve for the AC / DC hybrid electric field under the line is determined as follows: , p =95% ， , p =90% ， , p =85%， , p =80% ， The control value curves of the AC / DC hybrid electric field along the edge of the transmission line corridor are determined using the following methods: When a person insulated from ground touches a grounded metal body without experiencing an unacceptable transient electric shock under a preset probability and the transient discharge charge is less than 3 μC, determine the control value curve of the AC / DC mixed electric field along the edge of the transmission line corridor, including: , p =95% ， , p =90% ， , p =85% ， The control value curves for the AC / DC mixed electric field along the edge of the transmission line corridor are determined when, under a preset probability, a person touching a grounded insulated metal object does not experience an unacceptable transient electric shock and the transient discharge charge is less than 3 μC. This includes: , p =95% ， , p =90% ， , p =85% ， , p =80% ， in, E DC The absolute value of the DC electric field strength. E AC This is the effective value of the power frequency electric field strength. p This represents the probability that no unacceptable feelings occurred during the experiment.

7. The system according to claim 6, characterized in that, For trunk conductors, when transmission lines pass through non-residential areas... E AC The value is less than or equal to 10 kV / m. E DC The value should be less than or equal to 30 kV / m; for When the main conductor or power transmission line passes through a residential area, E AC The value is less than or equal to 7kV / m. E DC The value should be less than or equal to 25 kV / m; For wet conductors, when power transmission lines pass through non-residential areas... E AC The value is less than or equal to 10 kV / m. E DC The value is less than or equal to 36 kV / m; for Wet conductors, when power transmission lines pass through residential areas, E AC The value is less than or equal to 7kV / m. E DC The value should be less than or equal to 30 kV / m; When a person insulated from the ground touches a grounded metal object, they do not experience an unacceptable transient electric shock. E AC The value is less than or equal to 4kV / m. E DC The value should be less than or equal to 15 kV / m; When a person insulated from the ground touches a grounded metal object, they do not experience an unacceptable transient electric shock. E AC The value is less than or equal to 4kV / m. E DC The value is less than or equal to 15 kV / m.

8. The system according to claim 5, characterized in that, The matching unit determines the relationship curve between the target power frequency electric field strength and the DC electric field strength using the following methods: In direct perception experiments, under different probabilities of no unacceptable direct perception, the relationship curves between the target power frequency electric field strength and the DC electric field strength are determined, including: E DC = 0.2108 E 2 AC – 4.8002 E AC + 29.658, p =95% ， E DC = 0.2077 E 2 AC – 4.9820 E AC + 32.497, p =90% ， E DC = 0.2024 E 2 AC - 5.0327 E AC + 34.096, p =85% ， E DC = 0.2024 E 2 AC - 5.1145 E AC + 35.450, p =80% ， E DC = 0.1994 E 2 AC - 5.1369 E AC + 36.496, p =75% ， E DC = 0.1893 E 2 AC - 5.0582 E AC + 37.121, p =70% ， In a test where a person insulated from ground touches a grounded metal body, the relationship curves between the target power frequency electric field strength and the DC electric field strength are determined under different probabilities of not experiencing an unacceptable transient electric shock, including: E DC = -1.1684 E 2 AC + 1.3033 E AC + 12.8537, p =95% ， E DC = -0.9945 E 2 AC + 0.3446 E AC + 14.9979, p =90% ， E DC = -0.8051 E 2 AC – 0.6334 E AC + 16.9111, p =85% ， E DC = -0.6198 E 2 AC – 1.5673 E AC + 18.6555, p =80%， E DC = -0.4425 E 2 AC – 2.4492 E AC + 20.2689, p =75% ， E DC = -0.2737 E 2 AC – 3.2814 E AC + 21.7765, p =70% ， In a well-grounded human touching an insulated metal object, the relationship curves between the target power frequency electric field strength and the DC electric field strength were determined under different probabilities of not experiencing an unacceptable transient electric shock, including: E DC = -1.0232 E 2 AC + 0.7694 E AC + 12.1193, p =95% ， E DC = -0.9648 E 2 AC + 0.2733 E AC + 13.5256, p =90%， E DC = -0.9295 E 2 AC – 0.02027 E AC + 14.5332, p =85% ， E DC = -0.9083 E 2 AC – 0.2026 E AC + 15.3528, p =80% ， E DC = -0.8990 E 2 AC – 0.3010 E AC + 16.0545, p =75% ， E DC = -0.9025 E 2 AC – 0.3195 E AC + 16.6711, p =70% ， in, E DC The absolute value of the DC electric field strength. E AC This is the effective value of the power frequency electric field strength. p This represents the probability that no unacceptable feelings occurred during the experiment.

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