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CN-121981567-A - Micro-grid project technical economy evaluation method and calculation program

CN121981567ACN 121981567 ACN121981567 ACN 121981567ACN-121981567-A

Abstract

The invention relates to the technical field of rural distributed new energy development and utilization, in particular to a technical economic evaluation method and a calculation program for micro-grid projects. A technical and economic evaluation method for a micro-grid project comprises the following steps of S1, constructing a three-dimensional index system, defining each index definition, each unit and each calculation boundary around the whole life cycle of the micro-grid, S2, carrying out data-driven calculation logic design based on logic chains of boundary parameters, supporting parameters, intermediate variables and index results, S3, designing different parameter adjustment rules according to different rural scenes through scene adaptation design, and S4, developing matched calculation tools. A micro-grid project technical economy evaluation calculation program at least comprises an input module, a calculation module, an output module and a visualization module. The invention provides a comprehensive, accurate and scenic technical and economic evaluation scheme with strong practical operability, and develops a matched calculation tool to realize automatic calculation of indexes and visualization of results, thereby improving the practical operability.

Inventors

  • WANG HONGLIANG
  • TANG YAPENG
  • LIU FUYAN
  • LAO YONGCHANG
  • YING QI

Assignees

  • 国网浙江省电力有限公司经济技术研究院

Dates

Publication Date
20260505
Application Date
20251209

Claims (10)

  1. 1. A technical economy evaluation method for micro-grid projects is characterized by comprising the following steps: S1, constructing a three-dimensional index system, namely, designing 13 core indexes in total of 3 dimensions of technology, economy and society around the whole life cycle representation of a micro-grid, and defining the definition, units and calculation boundaries of each index; S2, data-driven calculation logic design is performed, and accurate calculation of indexes is realized based on logic chains of boundary parameters, supporting parameters, intermediate variables and index results; s3, a scene adaptation design is carried out, and a differential parameter adjustment rule is designed according to different rural scenes; s4, developing a matched computing tool, and developing a computing tool with input, computing, output and visualization functions.
  2. 2. The method for technical and economic evaluation of a micro-grid project according to claim 1, wherein the step S2 comprises: s21, defining parameters, including boundary parameters, supporting parameters and intermediate variables; S22, calculating the power supply availability, the new energy penetration rate, the voltage qualification rate, the autonomous support duration, the load adjustment flexibility, the comprehensive line loss rate, the total investment internal yield, the electricity-making investment cost, the auxiliary service yield, the unit investment carbon reduction amount, the new energy consumption rate and the user electricity cost reduction amplitude by a calculation formula.
  3. 3. The technical and economic evaluation method of a micro grid project according to claim 2, wherein the boundary parameters in the step S21 are basic boundary conditions of the micro grid project of the platform region, and the core data before and after the implementation of the coverage project at least comprises an original power grid scale, an original power quantity, an original index level, a construction scale, a delayed transformation scale and a target prediction parameter.
  4. 4. The technical and economic evaluation method for the micro-grid project according to claim 2, wherein the support parameters in the step S21 are various support parameters required for calculating the index of the micro-grid of the platform region, and comprise dimensions and calculation constants such as power supply reliability, economy, cost, technical effect, technical constraint, system foundation, load adjustment and the like.
  5. 5. The method for technical and economic evaluation of a micro-grid project according to claim 2, wherein the intermediate variables in the step S21 are key intermediate variables in the process of calculating the index of the micro-grid of the platform region, and at least include state variables, investment-related variables, and profit-related variables before and after project implementation.
  6. 6. The technical economy evaluation method of the micro-grid project is characterized in that rural scenes in the step S3 at least comprise plain industrial villages, hilly rural-optical complementary villages and mountain area pure residential villages, the industrial load ratio of the plain industrial villages is high, adjustable load ratio parameters of load adjustment flexibility are required to be improved, industrial load peak-staggering requirements are adapted, the photovoltaic permeability of the hilly rural-optical complementary villages is high, the distribution network overvoltage risk coefficient is required to be reduced to 0.15, voltage out-of-limit caused by photovoltaic output is avoided, the mountain area pure residential villages are strong in demand, key load ratio parameters of autonomous support duration are required to be improved, and emergency protection capability is improved.
  7. 7. The technical and economic evaluation method for the micro-grid project according to claim 1, which is characterized by comprising the following implementation processes: s01, determining supporting parameters, and adopting regional typical values or industry standard values; s02, filling in project boundary parameters, wherein at most, three groups of boundary parameters are filled in the one-time evaluation implementation process; S03, calculating intermediate parameters according to the support parameters in the step S01 and the project boundary parameters in the step S02; S04, calculating an index evaluation result, wherein the index evaluation result is calculated according to the support parameter in the step S01, the project boundary parameter in the step S02 and the intermediate parameter in the step S03; s05, sensitivity analysis, namely analyzing construction cost, electricity purchasing cost, auxiliary service income and delaying the sensitivity of the power grid transformation to internal income ratio change according to all the results obtained in the steps S01 to S04.
  8. 8. The technical and economic evaluation method for the micro-grid project according to claim 7, wherein the construction cost in the step S05 comprises a photovoltaic unit cost, an energy storage unit cost, a flexible and straight unit cost and a grid unit cost, the electricity purchase cost comprises a grid electricity purchase cost and an electricity selling additional cost, and the auxiliary service benefit comprises an energy storage auxiliary service unit benefit, a flexible and straight auxiliary service unit benefit and a load adjustment unit benefit.
  9. 9. A micro-grid project technical economy evaluation calculation program characterized by being used for realizing the method according to any one of claims 1-8, comprising a computer readable storage medium storing computer program instructions, at least comprising an input module, a calculation module, an output module and a visualization module.
  10. 10. A micro-grid project technical economic evaluation calculation program according to claim 9, wherein the input module provides a manual entry or template importing function of boundary parameters and support parameters; The calculation module is internally provided with the index calculation formula, automatically completes intermediate variable deduction and index calculation, and supports multi-scheme comparison calculation and sensitivity analysis; The output module generates an intermediate variable table, an index evaluation result table and a sensitivity analysis chart; And the visualization module displays index comparison under different scenes through a histogram and a line graph.

Description

Micro-grid project technical economy evaluation method and calculation program Technical Field The invention relates to the technical field of rural distributed new energy development and utilization, in particular to a technical economic evaluation method and a calculation program for micro-grid projects. Background Under the dual driving of the 'double carbon' target and the rural vibration strategy, rural distributed new energy becomes an important grip. However, the current rural microgrid project evaluation has the following key problems: 1. The evaluation dimension is single, the traditional method has multiple emphasis on the technical performance or economic benefit and single dimension, the cooperativity of 'technology-economy-society' is ignored, for example, only the installed capacity of the photovoltaic and the return on investment are concerned, the social values such as the carbon reduction benefit, the electricity consumption cost reduction of the user and the like are not fully considered, and the comprehensive value of the project is difficult to be comprehensively reflected. 2. The calculation logic is inaccurate, the specificity of the rural micro-grid, such as details of photovoltaic annual attenuation rate, energy storage discharge efficiency, load regulation response time attenuation and the like, are not fully considered in the existing evaluation, so that the index calculation deviation is large, and the accurate decision cannot be supported. 3. The scene suitability is poor, different scenes such as plain industry type, hilly agriculture light complementation type, mountain pure living type and the like exist in rural areas, the existing method is not designed for different scenes, and the universality is insufficient. 4. The method has the defects of insufficient operability, lack of matched calculation tools, dependence on manual complicated deduction of index calculation, low efficiency and easy error, and is difficult to meet the requirement of rapid evaluation of large-scale whole village photovoltaic projects. Therefore, there is a need to construct a set of multi-dimensional, high-precision, scenic and practical economic evaluation method and calculation tool for micro-grid technology to solve the above problems. Disclosure of Invention In order to overcome the existing pain points of technical economic evaluation of rural area micro-grids in the prior art, the invention provides a comprehensive, accurate and scenic micro-grid project technical economic evaluation method and a calculation program with strong operability. In order to solve the technical problems, the invention provides the following technical scheme: A technical economy evaluation method for micro-grid projects comprises the following steps: S1, constructing a three-dimensional index system, namely, designing 13 core indexes in total of 3 dimensions of technology, economy and society around the whole life cycle representation of a micro-grid, and defining the definition, units and calculation boundaries of each index; S2, data-driven calculation logic design is performed, and accurate calculation of indexes is realized based on logic chains of boundary parameters, supporting parameters, intermediate variables and index results; s3, a scene adaptation design is carried out, and a differential parameter adjustment rule is designed according to different rural scenes; s4, developing a matched computing tool, and developing a computing tool with input, computing, output and visualization functions. The scheme breaks through the limitation of single-dimension evaluation, constructs a three-dimensional collaborative evaluation system of 'technology-economy-society', fully covers the full life cycle value of the micro-grid, optimizes calculation logic, brings in key parameters such as equipment attenuation, efficiency loss and the like, improves evaluation precision, adapts to rural differentiation scenes, designs a scene parameter system, enhances the universality of the method, develops matched calculation tools, realizes index automatic calculation and result visualization, and improves practical operability. On the basis of adopting the technical scheme, the invention can also adopt the following further technical scheme: the step S2 includes: s21, defining parameters, including boundary parameters, supporting parameters and intermediate variables; S22, calculating the power supply availability, the new energy penetration rate, the voltage qualification rate, the autonomous support duration, the load adjustment flexibility, the comprehensive line loss rate, the total investment internal yield, the electricity-making investment cost, the auxiliary service yield, the unit investment carbon reduction amount, the new energy consumption rate and the user electricity cost reduction amplitude by a calculation formula. The boundary parameters in step S21 are basic boundary conditions of the micro grid project of the pla