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Capacity optimization method for hydroelectric/wind power/photovoltaic matching power source of sending-end system considering resource constraint

A technology with resource constraints and power capacity, applied in photovoltaic power generation, wind power generation, electrical components, etc., can solve the problems of inability to guarantee the safety, stability and consumption capacity of power delivery, insufficient consideration, and lack of power.

Active Publication Date: 2018-11-06
STATE GRID SICHUAN ECONOMIC RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In response to the above problems, domestic and foreign scholars have proposed relevant methods, but these methods do not fully consider when multiple types of renewable energy are bundled and delivered, and lack of consideration of certain influencing factors, it will not be possible to ensure the delivery of renewable energy with a high proportion of hydropower. The safety, stability and capacity of the power transmission of systems such as Sichuan and Yunnan, etc.

Method used

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  • Capacity optimization method for hydroelectric/wind power/photovoltaic matching power source of sending-end system considering resource constraint
  • Capacity optimization method for hydroelectric/wind power/photovoltaic matching power source of sending-end system considering resource constraint
  • Capacity optimization method for hydroelectric/wind power/photovoltaic matching power source of sending-end system considering resource constraint

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Embodiment 1

[0083] A method for optimizing the power supply capacity of water, wind and wind power in a sending-end system considering resource constraints, comprising the following steps:

[0084] A. According to the requirements of the sending and receiving end system, two methods for formulating DC power transmission curves are formulated. The methods include that the sending end does not participate in the receiving end peak regulation and the sending end part participates in the receiving end peak regulation;

[0085] B. Considering resource constraints, optimize the power supply capacity model for water, wind and wind;

[0086] C. Calculate and solve.

[0087] combine figure 1 , Figure 5 This embodiment will be described. In a high-proportion renewable energy system, hydropower and thermal power units usually participate in peak regulation, jointly smoothing wind power, photovoltaic output and local load fluctuations, so that UHV DC output power remains stable. Such as figure ...

Embodiment 2

[0155] This embodiment is described in detail in conjunction with a specific implementation, see Figure 2 to Figure 4 .

[0156] like figure 2 As shown, the planning grid diagram of a renewable energy-rich province in Southwest China in 2025, and the specific steps of the application analysis of the capacity optimization method for water, wind and wind power supply of the sending end system considering resource constraints are as follows. In this example system, the transmission capacity of the AC section is about 6000MW, the rated power of the ultra-high voltage DC transmission line is 3000MW (transmitting power to the northwest during the wet season, and receiving power from the northwest to the province during the dry season), 7 UHV DC transmission lines The total rated power of the line is 59600MW (the DC rated power of each line is 7200, 8000, 6400, 10000, 10000, 10000 and 8000MW respectively)

[0157] 1) Determine the DC output curve

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Abstract

The invention discloses a capacity optimization method for a hydroelectric / wind power / photovoltaic matching power source of a sending-end system considering a resource constraint, comprising the stepsof: developing two DC power transmission curve draw-up methods according to sending-end / receiving-end system requirements, wherein the methods comprise situations that a sending end does not participate in peak load regulation of a receiving end and the sending end partially participates in peak load regulation of the receiving end; considering the resource constraint to optimize a hydroelectric / wind power / photovoltaic matching power source capacity model; and performing calculation to achieve solution. The capacity optimization method of the invention has the beneficial effects that: the method fully considers regulation characteristics of different types of hydro-power generating units, and can be adapted to various DC transmission modes, thus problems of correlational research in the prior art can be effectively solved, and safety, stability and an absorption capability of power source transmission of a high hydroelectric proportion renewable energy source sending-end system can beimproved.

Description

technical field [0001] The invention relates to the technical field of a method for optimizing the capacity of a supporting power supply for water, wind and wind, and in particular to a method for optimizing the capacity of a supporting power supply for water and wind in a sending system considering resource constraints. Background technique [0002] Accelerating the development of renewable energy is an inevitable choice to achieve my country's energy security, clean, efficient and sustainable development. As of 2017, the installed capacity of renewable energy power generation in my country has reached 650 million kilowatts, accounting for about 36.6% of the total installed capacity of electricity. In some provinces rich in renewable energy resources in China, the proportion of installed capacity of renewable energy has reached more than 80%. However, since most of my country's renewable energy-rich areas are located in the western region where economic development is rela...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38
CPCH02J3/382H02J2203/20Y02E10/56Y02E10/76
Inventor 叶希李婷唐权陈谦王云玲欧阳雪彤朱觅胥威汀李奥苏韵掣邓盈盈刘莹沈力
Owner STATE GRID SICHUAN ECONOMIC RES INST
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