Evaluation method and system for measure for improving power supply reliability of power distribution network

Abstract

The invention discloses a power distribution network power supply reliability improvement measure evaluation method and system, and the method comprises the steps: calculating the household average power supply shortage amount of a power distribution network, calculating the voltage reduction value of the power supply reliability improvement measure for the household average power supply shortage amount, and enabling the power supply reliability improvement measure to comprise a distributed power supply and electric vehicle cooperation measure. The contribution degree of the power supply reliability improvement measure to the voltage reduction of the missing power supply quantity is calculated based on the voltage reduction value, so that the positive effect of novel source loads such as a distributed power supply and an electric vehicle on the power supply reliability improvement can be fully considered; by calculating the household average power supply shortage and calculating the contribution index of the power supply reliability improvement measure to the voltage reduction of the power supply shortage, the influence of multiple elements on the power supply reliability can be effectively quantitatively evaluated, so that the effect of the novel source-load collaborative measure on the improvement of the power supply reliability of the power distribution network can be accurately evaluated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power distribution network, and particularly relates to a method and system for evaluating power distribution network power supply reliability improvement initiatives. BACKGROUND

[0002] With the comprehensive promotion of the construction of the new power system, as typical representatives of new source and load, distributed power and electric vehicles show a trend of large-scale access to the distribution network, and the impact on the distribution network is increasingly obvious. The existing power distribution network power supply reliability evaluation only focuses on traditional dimensions such as planning and construction and operation and maintenance management, and fails to fully consider the positive role of distributed power and electric vehicles in supporting the recovery of load power supply, and it is difficult to accurately evaluate the effect of new source and load collaborative initiatives such as distributed power and electric vehicles on the improvement of the power supply reliability of the distribution network under the background of the construction of the new power system. SUMMARY

[0003] The technical problem to be solved by the present application is to provide a method and system for evaluating power distribution network power supply reliability improvement initiatives, which can accurately evaluate the effect of new source and load collaborative initiatives on the improvement of the power supply reliability of the distribution network.

[0004] To solve the above technical problems, the technical scheme adopted by the present application is: A method for evaluating power distribution network power supply reliability improvement initiatives, comprising the steps of: calculating the average lack of power supply per household of the distribution network; calculating the reduction value of the power supply reliability improvement initiatives on the average lack of power supply per household, the power supply reliability improvement initiatives including distributed power and electric vehicle collaborative initiatives; calculating the contribution degree of the power supply reliability improvement initiatives to the reduction of the lack of power supply based on the reduction value.

[0005] To solve the above technical problems, another technical scheme adopted by the present application is: A system for evaluating power distribution network power supply reliability improvement initiatives, comprising a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to realize each step of the above method for evaluating power distribution network power supply reliability improvement initiatives.

[0006] The beneficial effect of the present application is that: the average household power shortage of the power distribution network is calculated, the reduction value of the power supply reliability improvement measure on the average household power shortage is calculated, the power supply reliability improvement measure includes distributed power and electric vehicle collaborative measure, and the contribution degree of the power supply reliability improvement measure to the reduction of the power shortage is calculated based on the reduction value, so that the positive effect of the new type of source and load such as distributed power and electric vehicle on the improvement of power supply reliability can be fully considered, and the influence of multiple elements on the power supply reliability can be effectively quantified and evaluated by calculating the average household power shortage and the contribution degree of the power supply reliability improvement measure to the reduction of the power shortage, so that the effect of the new type of source and load collaborative measure on the improvement of the power supply reliability of the power distribution network can be accurately evaluated. BRIEF DESCRIPTION OF DRAWINGS

[0007] Figure 1 A flow chart of a power supply reliability improvement measure evaluation method of a power distribution network according to an embodiment of the present application; Figure 2 A schematic diagram of a power supply reliability improvement measure evaluation system of a power distribution network according to an embodiment of the present application. DETAILED DESCRIPTION

[0008] In order to explain the technical content, the purposes and effects of the present application in detail, the following will be explained in combination with the embodiments and the accompanying drawings.

[0009] Before the embodiments of the present application are described in detail, some related concepts will be explained first: Average household power shortage: the power shortage of each household user in a given time interval due to unexpected failure of the power supply system or planned power outage.

[0010] In the prior art, the power supply reliability evaluation of the power distribution network only focuses on traditional dimensions such as planning and construction and operation and maintenance management, and fails to fully consider the positive effect of distributed power and electric vehicle on supporting the recovery of load power supply, and it is difficult to accurately evaluate the improvement effect of new type of source and load such as distributed power and electric vehicle on the power supply reliability of the power distribution network under the background of new type of power system construction.

[0011] In order to at least solve the above problems, please refer to Figure 1 The embodiment of the present application provides a power supply reliability improvement measure evaluation method of a power distribution network, which comprises the following steps: calculating the average household power shortage of the power distribution network; calculating the reduction value of the power supply reliability improvement measure on the average household power shortage, wherein the power supply reliability improvement measure includes distributed power and electric vehicle collaborative measure; calculating the contribution degree of the power supply reliability improvement measure to the reduction of the power shortage based on the reduction value.

[0012] From the above description, the beneficial effects of the present application are that the household average power shortage of the power distribution network is calculated, the reduction value of the power supply reliability improvement measure on the household average power shortage is calculated, the power supply reliability improvement measure includes the distributed power supply and electric vehicle collaborative measure, and the contribution degree of the power supply reliability improvement measure to the power shortage reduction is calculated based on the reduction value, so that the positive effect of the new type of source and load such as the distributed power supply and electric vehicle on the power supply reliability improvement can be fully considered, the influence of multiple elements on the power supply reliability can be effectively quantified by calculating the household average power shortage and the contribution degree index of the power supply reliability improvement measure to the power shortage reduction, and thus the effect of the new type of source and load collaborative measure on the power supply reliability improvement of the power distribution network can be accurately evaluated.

[0013] Further, the household average power shortage of the power distribution network is calculated, including: The fault outage capacity, fault outage time, pre-arranged outage capacity, pre-arranged outage time, total annual power sales, total annual user capacity and reference user quantity of the power distribution network are obtained; The household average power shortage of the power distribution network is calculated according to the fault outage capacity, fault outage time, pre-arranged outage capacity, pre-arranged outage time, total annual power sales, total annual user capacity and reference user quantity of the power distribution network.

[0014] Further, the household average power shortage of the power distribution network is calculated according to the fault outage capacity, fault outage time, pre-arranged outage capacity, pre-arranged outage time, total annual power sales, total annual user capacity and reference user quantity of the power distribution network, specifically: ; In the formula, The household average power shortage of the power distribution network is represented by, The fault outage capacity is represented by, The fault outage time is represented by, The pre-arranged outage capacity is represented by, The pre-arranged outage time is represented by, The total annual power sales is represented by, The total annual user capacity is represented by, N The reference user quantity of the power distribution network is represented by.

[0015] From the above description, the household average power shortage of the power distribution network is calculated according to the fault outage capacity, fault outage time, pre-arranged outage capacity, pre-arranged outage time, total annual power sales, total annual user capacity and reference user quantity of the power distribution network, which directly reflects the degree of power shortage that users actually face and accurately quantifies the power supply gap of the power distribution network.

[0016] Further, before calculating the reduction value of the power supply reliability improvement initiatives on the household average power shortage, the method further comprises: According to the household average power shortage, a household average power shortage target value is calculated.

[0017] From the above description, according to the household average power shortage, a household average power shortage target value is calculated, which facilitates subsequent use of the target value as a reference to determine the direction of power supply reliability improvement.

[0018] Further, the power supply reliability improvement initiatives further include operation and maintenance initiatives and distribution network planning and construction initiatives. The calculation of the reduction value of the power supply reliability improvement initiatives on the household average power shortage includes: Obtaining operation and maintenance initiative related data, the operation and maintenance initiative related data including the pre-arranged power outage load of the last year, the pre-arranged power outage load of the second last year and the pre-arranged power outage load of the third last year; According to the pre-arranged power outage load of the last year, the pre-arranged power outage load of the second last year and the pre-arranged power outage load of the third last year, a first reduction value of the operation and maintenance initiatives on the household average power shortage is calculated; According to the first reduction value and the household average power shortage, it is determined whether the household average power shortage is less than or equal to the household average power shortage target value, if not, obtaining distributed power source and electric vehicle coordination initiative related data, the distributed power source and electric vehicle coordination initiative related data including distributed power source coverage with fault ride-through capability, fault automatic reclosing success rate, anti-islanding protection action success rate, distributed power source installation penetration rate, vehicle-to-grid charging equipment coverage rate, orderly charging equipment coverage rate and electric vehicle charging equipment installation penetration rate; According to the distributed power source and electric vehicle coordination initiative related data, a second reduction value of the distributed power source and electric vehicle coordination initiatives on the household average power shortage is calculated; According to the second reduction value, the first reduction value and the household average power shortage, it is determined whether the household average power shortage is less than or equal to the household average power shortage target value, if not, obtaining distribution network planning and construction initiative related data; According to the distribution network planning and construction initiative related data, a third reduction value of the distribution network planning and construction initiatives on the household average power shortage is calculated.

[0019] From the above description, each initiative can be quantified in layers and accurately to reduce the household average power shortage, which facilitates the determination of initiatives that can effectively improve power supply reliability.

[0020] Further, the first reduction value of the operation and maintenance management measure on the household average power shortage is calculated according to the pre-arranged power outage load of the last year, the pre-arranged power outage load of the last two years and the pre-arranged power outage load of the last three years, specifically: ; In the formula, represents the first reduction value, represents the pre-arranged power outage load of the last two years, represents the pre-arranged power outage load of the last year, represents the pre-arranged power outage load of the last three years, represents the forgetting factor.

[0021] As can be seen from the above description, the first reduction value of the operation and maintenance management measure on the household average power shortage is calculated according to the pre-arranged power outage load of the last year, the pre-arranged power outage load of the last two years and the pre-arranged power outage load of the last three years, avoiding the contingency of single-year data, reflecting the load change rule, and providing a stable and objective basis for the calculation of the first reduction value.

[0022] Further, the second reduction value of the distributed power and electric vehicle coordination measure on the household average power shortage is calculated according to the distributed power and electric vehicle coordination measure related data, specifically: ; ; In the formula, represents the distributed power reduction value in the second reduction value, represents the distributed power coverage with fault ride-through capability, represents the automatic reclosing success rate after fault, represents the success rate of anti-islanding protection action, represents the distributed power installation penetration rate, represents the distribution transformer rated capacity, represents the electric vehicle reduction value in the second reduction value, represents the vehicle-to-grid interaction charging equipment coverage, represents the orderly charging equipment coverage, represents the electric vehicle charging equipment installation penetration rate.

[0023] As can be seen from the above description, the fault ride-through coverage, reclosing success rate and other core indicators of the distributed power, and the vehicle-to-grid interaction coverage, orderly charging coverage and other indicators of the electric vehicle are respectively embedded into the corresponding reduction formula, realizing the direct connection between technical parameters and reduction effect, and avoiding the distortion caused by index generalization.

[0024] Further, a third reduction value of the household average power shortage of the power distribution network planning and construction initiative is calculated according to the power distribution network planning and construction initiative related data, specifically: ; In the formula, the third reduction value is represented, the heavy overload distribution transformer ratio is represented, the typical day maximum load is represented, the generator set output power under the maximum operation mode of the power grid is represented, the off-grid distribution transformer ratio is represented, the generator set output power under the minimum operation mode of the power grid is represented, the off-grid load is represented.

[0025] As can be known from the above description, by calculating the third reduction value of the household average power shortage of the power distribution network planning and construction initiative, the optimization effect of the power distribution network planning and construction initiative on the household average power shortage can be accurately measured.

[0026] Further, the contribution degree of the power supply reliability improvement initiative to the power shortage reduction is calculated based on the reduction value, specifically: ; In the formula, the contribution degree of the power supply reliability improvement initiative k to the power shortage reduction is represented, the reduction value of the power supply reliability improvement initiative k to the household average power shortage is represented.

[0027] As can be known from the above description, the reduction value of each initiative is associated with the total reduction value, and the contribution degree of a single initiative to the power shortage reduction is presented in the form of percentage, so that the actual role weight of different initiatives can be intuitively reflected, thereby facilitating the continuous optimization of high-contribution initiatives or the targeted improvement of the implementation strategy of low-contribution initiatives, and the power supply reliability of the power distribution network can be more efficiently improved.

[0028] Please refer to Figure 2 , another embodiment of the present application provides an evaluation system for a power distribution network power supply reliability improvement initiative, which comprises a memory, a processor, and a computer program stored on the memory and executable on the processor, and each step of the evaluation method for the power distribution network power supply reliability improvement initiative is realized when the processor executes the computer program.

[0029] The evaluation method and system for the power distribution network power supply reliability improvement initiative described above are suitable for power distribution networks that need to improve power supply reliability, and the following will be described through specific implementation manners: Please refer to Figure 1 , an embodiment of the present application is: An evaluation method of a power distribution network power supply reliability improvement initiative, comprising the steps of: S1, calculating the household average power supply shortage of the power distribution network, specifically comprising S11-S12: S11, obtaining the fault outage capacity, fault outage time, pre-arranged outage capacity, pre-arranged outage time, total electricity sales of the last year, total user capacity of the last year, and the number of benchmark users of the power distribution network.

[0030] S12, calculating the household average power supply shortage of the power distribution network according to the fault outage capacity, the fault outage time, the pre-arranged outage capacity, the pre-arranged outage time, the total electricity sales of the last year, the total user capacity of the last year, and the number of benchmark users of the power distribution network, specifically: ; In the formula, represents the household average power supply shortage of the power distribution network, represents the fault outage capacity, represents the fault outage time, represents the pre-arranged outage capacity, represents the pre-arranged outage time, represents the total electricity sales of the last year, represents the total user capacity of the last year, N represents the number of benchmark users of the power distribution network.

[0031] In an optional embodiment, it further comprises calculating a household average power supply shortage target value according to the household average power supply shortage, specifically: ; In the formula, represents the household average power supply shortage target value, represents a proportional coefficient that conservatively considers the development changes of the number of power supply users, load level and generator installed capacity, in an optional embodiment, .

[0032] S2, calculating the reduction value of the household average power supply shortage of the power supply reliability improvement initiative, the power supply reliability improvement initiative comprising a distributed power source and electric vehicle collaborative initiative, an operation and maintenance initiative, and a power distribution network planning and construction initiative, specifically comprising S21-S26: S21, obtaining operation and maintenance initiative related data, the operation and maintenance initiative related data comprising pre-arranged outage load of the last year, pre-arranged outage load of the second last year, and pre-arranged outage load of the third last year.

[0033] S22, calculating a first pressure reduction value of the operation and maintenance management measure on the household average power shortage according to the last year pre-arranged power outage load, the second last year pre-arranged power outage load and the third last year pre-arranged power outage load, specifically as follows: ; In the formula, the first pressure reduction value is represented, the second last year pre-arranged power outage load is represented, the last year pre-arranged power outage load is represented, the third last year pre-arranged power outage load is represented, the forgetting factor is represented.

[0034] In an optional embodiment, the value is 0.8-1.5.

[0035] S23, judging whether the household average power shortage is less than or equal to the household average power shortage target value according to the first pressure reduction value and the household average power shortage, if not, obtaining distributed power source and electric vehicle collaborative measure related data, the distributed power source and electric vehicle collaborative measure related data including distributed power source coverage with fault ride-through capability, post-fault automatic reclosing success rate, anti-islanding protection action success rate, distributed power source installed penetration, vehicle-to-grid interaction charging equipment coverage, orderly charging equipment coverage and electric vehicle charging equipment installed penetration.

[0036] The first pressure reduction value and the household average power shortage are used to judge whether the household average power shortage is less than or equal to the household average power shortage target value, specifically as follows: judging whether the following equation is established.

[0037] S24, calculating a second pressure reduction value of the distributed power source and electric vehicle collaborative measure on the household average power shortage according to the distributed power source and electric vehicle collaborative measure related data, specifically as follows: ; ; In the formula, the distributed power source pressure reduction value in the second pressure reduction value is represented, the distributed power source coverage with fault ride-through capability is represented, the post-fault automatic reclosing success rate is represented, the anti-islanding protection action success rate is represented, the distributed power source installed penetration is represented, the distribution transformer rated capacity is represented, the electric vehicle pressure reduction value in the second pressure reduction value is represented, The charging device coverage rate of vehicle-to-grid interaction, The charging device coverage rate of orderly charging, The installed capacity penetration rate of electric vehicle charging devices. 0.9 is the maximum power factor of the distributed power island operation mode given in GB / T 37408-2019.

[0038] S25, judging whether the household average power shortage is less than or equal to the household average power shortage target value according to the second pressure reduction value, the first pressure reduction value and the household average power shortage, if not, obtaining power distribution network planning and construction measure related data.

[0039] Wherein, judging whether the household average power shortage is less than or equal to the household average power shortage target value according to the second pressure reduction value, the first pressure reduction value and the household average power shortage, specifically: Judging Whether it is established.

[0040] S26, calculating a third pressure reduction value of the power distribution network planning and construction measure on the household average power shortage according to the power distribution network planning and construction measure related data, specifically: ; Wherein, The third pressure reduction value is represented by, The heavy overload distribution transformer ratio is represented by, The typical day maximum load is represented by, The generator set output power under the maximum operation mode of the power grid is represented by, The off-grid distribution transformer ratio is represented by, The generator set output power under the minimum operation mode of the power grid is represented by, The off-grid load is represented by. 0.15 is the proportion coefficient considering power compensation and on-load voltage regulation device operation, and 0.25 is the proportion coefficient considering new type switch and automation device operation, double power supply and backup redundancy, and optimized transfer strategy.

[0041] Wherein, the third pressure reduction value can make the household average power shortage less than or equal to the household average power shortage target value, that is, it can meet .

[0042] S3, calculating the contribution degree of the power supply reliability improvement measure to the power shortage reduction according to the pressure reduction value, specifically: ; Wherein, The contribution degree of the power supply reliability improvement measure k To the power shortage reduction is represented by, The pressure reduction value of the power supply reliability improvement measure k To the household average power shortage.

[0043] For example, k =1 is a distributed power supply and electric vehicle collaborative initiative, k =2 is an operation and maintenance management initiative, k =3 is a distribution network planning and construction initiative.

[0044] The data used above can be obtained from the pre-collected reference distribution network data and new source and load data.

[0045] In an optional embodiment, it can also include: according to the contribution degree, the power supply reliability improvement initiatives are sorted. To provide guidance for the direction of distribution network construction and reconstruction.

[0046] In summary, the above-mentioned power supply reliability improvement initiatives of the distribution network evaluation method, the household average power supply shortage of the distribution network is calculated, the reduction value of the power supply reliability improvement initiatives to the household average power supply shortage is calculated, the power supply reliability improvement initiatives include the distributed power supply and electric vehicle collaborative initiative, and the contribution degree of the power supply reliability improvement initiatives to the reduction of the power supply shortage is calculated based on the reduction value. In this way, the positive role of distributed power supply and electric vehicle, which is a new type of source and load, in improving power supply reliability can be fully considered. By calculating the household average power supply shortage and the contribution degree of the power supply reliability improvement initiatives to the reduction of the power supply shortage, the influence of multiple elements on the power supply reliability can be effectively quantified and evaluated, so as to accurately evaluate the effect of new source and load collaborative initiatives on the improvement of the power supply reliability of the distribution network. In addition, the reduction value of each initiative is associated with the total reduction value, and the contribution degree of a single initiative to the reduction of the power supply shortage is presented in the form of percentage, which directly reflects the actual role weight of different initiatives, so as to focus on the continuous optimization of high-contribution initiatives or improve the implementation strategy of low-contribution initiatives, and more efficiently improve the power supply reliability of the distribution network.

[0047] According to another aspect of the present application, Figure 2 is a schematic diagram showing a power supply reliability improvement initiative evaluation system of a distribution network according to an embodiment of the present application. The electronic device includes a memory, a processor, and a computer program stored on the memory and executable on the processor, and the processor executes the computer program to realize each step of the power supply reliability improvement initiative evaluation method of the distribution network as described above.

[0048] The above-mentioned embodiments are merely examples of the present application, and do not limit the patent scope of the present application, and any equivalent transformation or direct or indirect application in related technical fields based on the content of the specification and drawings of the present application are also included in the patent protection scope of the present application.

Claims

1. A method for evaluating power distribution grid power supply reliability improvement initiatives, characterized by, The method comprises the steps of: calculating the average power shortage per household of the power distribution network; calculating the reduction value of the power supply reliability improvement initiative on the average power shortage per household, the power supply reliability improvement initiative including a distributed power source and electric vehicle collaborative initiative; calculating the contribution degree of the power supply reliability improvement initiative to the reduction of power shortage based on the reduction value.

2. The method for evaluating power supply reliability improvement initiatives of a power distribution network according to claim 1, wherein, The calculation of the average power shortage per household of the power distribution network comprises: obtaining the fault outage capacity, fault outage time, pre-arranged outage capacity, pre-arranged outage time, total electricity sales of the last year, total user capacity of the last year, and the number of benchmark users of the power distribution network; calculating the average power shortage per household of the power distribution network according to the fault outage capacity, fault outage time, pre-arranged outage capacity, pre-arranged outage time, total electricity sales of the last year, total user capacity of the last year, and the number of benchmark users of the power distribution network.

3. The method of claim 2, wherein the method further comprises: The calculation of the average power shortage per household of the power distribution network according to the fault outage capacity, fault outage time, pre-arranged outage capacity, pre-arranged outage time, total electricity sales of the last year, total user capacity of the last year, and the number of benchmark users of the power distribution network comprises: ； In the formula, represents the average power shortage per household of the distribution network, represents the fault outage capacity, represents the fault outage time, represents the pre-arranged outage capacity, represents the pre-arranged outage time, represents the total amount of electricity sold in the previous year, represents the total amount of user capacity in the previous year, N represents the number of reference users of the distribution network.

4. The method for evaluating power supply reliability improvement initiatives of a power distribution network according to claim 1, wherein, Before calculating the reduction value of the power supply reliability improvement initiative on the average power shortage per household, the method further comprises: calculating the target value of the average power shortage per household according to the average power shortage per household.

5. The method for evaluating power supply reliability improvement initiatives of a power distribution network according to claim 4, wherein, The power supply reliability improvement initiative further comprises an operation and maintenance initiative and a power distribution network planning and construction initiative; The calculation of the reduction value of the power supply reliability improvement initiative on the average power shortage per household comprises: obtaining operation and maintenance initiative related data, the operation and maintenance initiative related data including pre-arranged outage load of the last year, pre-arranged outage load of the second last year, and pre-arranged outage load of the third last year; calculating the first reduction value of the operation and maintenance initiative on the average power shortage per household according to the pre-arranged outage load of the last year, the pre-arranged outage load of the second last year, and the pre-arranged outage load of the third last year; if not, obtaining distributed power source and electric vehicle collaborative initiative related data, the obtaining of the distributed power source and electric vehicle collaborative initiative related data including distributed power source coverage with fault ride-through capability, post-fault automatic reclosing success rate, anti-islanding protection action success rate, distributed power source installed penetration rate, vehicle-to-grid charging equipment coverage rate, orderly charging equipment coverage rate, and electric vehicle charging equipment installed penetration rate; calculating the second reduction value of the distributed power source and electric vehicle collaborative initiative on the average power shortage per household according to the distributed power source and electric vehicle collaborative initiative related data; if not, obtaining power distribution network planning and construction initiative related data; calculating the third reduction value of the power distribution network planning and construction initiative on the average power shortage per household according to the power distribution network planning and construction initiative related data.

6. The method for evaluating power supply reliability improvement initiatives of a power distribution network according to claim 5, wherein, According to the last year pre-arranged power-off load, the last two years pre-arranged power-off load and the last three years pre-arranged power-off load, a first pressure reduction value of the operation and maintenance management initiative on the household average power shortage is calculated, specifically: ； In the formula, represents the first pressure reduction value, represents the pre-arranged power cut load of the previous two years, represents the pre-arranged power cut load of the previous year, represents the pre-arranged power cut load of the previous three years, represents the forgetting factor.

7. The method for evaluating power supply reliability improvement initiatives of a power distribution network according to claim 5, wherein, According to the distributed power supply and electric vehicle coordination initiative related data, a second pressure reduction value of the distributed power supply and electric vehicle coordination initiative on the household average power shortage is calculated, specifically: ； ； In the formula, represents the distributed power reduction value in the second pressure reduction value, represents the distributed power coverage with fault ride-through capability, represents the post-fault automatic reclosing success rate, represents the anti-islanding protection action success rate, represents the distributed power installed penetration rate, represents the distribution transformer rated capacity, represents the electric vehicle reduction value in the second pressure reduction value, represents the vehicle-to-grid charging equipment coverage, represents the orderly charging equipment coverage, represents the electric vehicle charging equipment installed penetration rate.

8. The method for evaluating power supply reliability improvement initiatives of a power distribution network according to claim 5, wherein, According to the distribution network planning and construction initiative related data, a third pressure reduction value of the distribution network planning and construction initiative on the household average power shortage is calculated, specifically: ； wherein, denotes the third pressure reduction value, denotes the heavy overload dispatching ratio, denotes the typical day maximum load, denotes the generator set output power under the maximum operation mode of the power grid, denotes the off-grid dispatching ratio, denotes the generator set output power under the minimum operation mode of the power grid, denotes the off-grid load.

9. The method for evaluating power grid reliability improvement initiatives of claim 1, wherein, Based on the pressure reduction value, a contribution degree of the power supply reliability improvement initiative to the power shortage pressure reduction is calculated, specifically: ； In the formula, represents the power supply reliability improvement initiative k contribution to the reduction of the power shortage amount, represents the power supply reliability improvement initiative k reduction value of the per-household power shortage amount.

10. An evaluation system for power distribution grid power supply reliability improvement initiatives, comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that, The processor executes the computer program to realize each step in the power supply reliability improvement initiative evaluation method of any one of claims 1 to 9.

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