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Technical strategy evaluation method for improving the acceptance capacity of distributed photovoltaics in distribution network

A distributed photovoltaic, technical strategy technology, applied in data processing applications, instruments, computing, etc., can solve problems such as large installed capacity, randomness, volatility and poor dispatchability, power grid planning and safe and stable operation.

Active Publication Date: 2021-05-11
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large installed capacity in concentrated contiguous development areas and the low user load density in rural areas, the penetration rate of photovoltaics in some areas is high, which has different impacts on power quality, voltage fluctuations, and relay protection.
[0004] After a large number of distributed photovoltaics are connected to the grid, due to their randomness, volatility, poor dispatchability, and different grid connection methods, they will have a greater impact on the planning and safe and stable operation of the grid.

Method used

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  • Technical strategy evaluation method for improving the acceptance capacity of distributed photovoltaics in distribution network
  • Technical strategy evaluation method for improving the acceptance capacity of distributed photovoltaics in distribution network
  • Technical strategy evaluation method for improving the acceptance capacity of distributed photovoltaics in distribution network

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Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0081] Traditional technical strategies to improve photovoltaic acceptance capacity, such as installing reverse power protection devices on the grid side of feeders, or installing photovoltaic remote control devices to realize dynamic adjustment of photovoltaic power generation, can meet the operation requirements of distribution network by limiting photovoltaic power generation. , but it has no substantial help to improve the distributed photovoltaic acceptance capacity of the distribution network. Focusing on the future needs of photovoltaic development, it is necessary to further study the technical strategies for improving the distributed photovoltaic capacity of distribution networks. For example, start from the distribution network structure, equipment configuration or operation mode, etc., to study how to effectively realize the improvement strategy of distributed photovoltaic acceptance capacity without abandoning light.

[0082] This example is to compare the implemen...

Embodiment approach 2

[0095] like Figure 7 The techno-economic evaluation model provided, according to the cost-benefit analysis method, assuming that the current photovoltaic installed capacity of the distribution network has reached the maximum distributed photovoltaic acceptance capacity of the power grid, analyzes different technical strategies k to improve the distributed photovoltaic acceptance of the distribution network cost of capacity. like Figure 8 As shown, the specific analysis steps are as follows:

[0096] A221. Given different scenarios for improving the maximum distributed photovoltaic capacity of the distribution network, determine the improvement of the distributed photovoltaic capacity of the distribution network under different scenarios;

[0097] The scenario mainly considers the improvement target of the distribution network’s maximum distributed photovoltaic acceptance capacity and the operation constraints of the distribution network. Send back and so on. For the incr...

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Abstract

The invention discloses a technical strategy evaluation method for improving the distributed photovoltaic acceptance capacity of a distribution network, comprising the following steps: without implementing any technical strategy, calculating the photovoltaic power generation and photovoltaic capacity penetration rate and photovoltaic capacity for 8760 hours in a year Energy penetration rate, determine the maximum distributed photovoltaic receiving capacity of the initial distribution network, and determine the change of the distributed photovoltaic receiving capacity of the distribution network under the implementation of different technical strategies k. The invention provides a technical strategy evaluation method for improving the distributed photovoltaic acceptance capacity of a distribution network. Taking the lower limit of the allowable load rate as a constraint condition, a method of using the 8760-hour load curve and photovoltaic power generation output for photovoltaic acceptance in prefecture-level areas is proposed. The capacity research method comprehensively measures the photovoltaic acceptance capacity of the distribution network through concepts such as capacity penetration rate and energy penetration rate, and analyzes the changes in the distribution network to improve the photovoltaic acceptance capacity under different technical strategies.

Description

technical field [0001] The invention relates to the field of power system analysis, in particular to a technical strategy evaluation method for improving the distributed photovoltaic acceptance capacity of a distribution network. Background technique [0002] As a strategic emerging industry representing the direction of global energy technology innovation and energy strategic transformation, the photovoltaic industry is also an industry with international competitive advantages in my country. It is of great significance to my country's adjustment of energy structure, promotion of energy production and consumption revolution, and promotion of ecological civilization construction. At present, vigorously developing the photovoltaic industry has risen to the national energy strategy, and the country has issued a series of policies and measures to vigorously support the development of photovoltaic power generation. At the same time, the development of the energy Internet has als...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06Q10/06G06Q50/06
CPCG06Q10/0639G06Q50/06
Inventor 洪博文王彩霞李琼慧王基黄碧斌闫湖胡静王刘芳徐斌谢国辉汪晓露雷雪姣李梓仟肖婉婷李娜娜
Owner STATE GRID CORP OF CHINA