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Optimal scheduling method, system and equipment for distributed new energy power distribution network

A distributed new energy, optimized scheduling technology, applied in the direction of single-network parallel feed arrangement, etc., can solve the problem of lack of uncertainty in new energy output, achieve the effect of simplifying the solution process and improving computing efficiency

Active Publication Date: 2020-04-28
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
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Problems solved by technology

[0005] The present invention provides a distributed new energy distribution network optimization scheduling method, system and equipment, which solves the problem of lack of consideration of the maximum power supply capacity when optimizing the distribution network scheduling of distributed new energy power sources in the prior art. Technical Issues Influenced by New Energy Output Uncertainty

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  • Optimal scheduling method, system and equipment for distributed new energy power distribution network
  • Optimal scheduling method, system and equipment for distributed new energy power distribution network
  • Optimal scheduling method, system and equipment for distributed new energy power distribution network

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Embodiment 1

[0047] see figure 1 , figure 1 It is a method flowchart of an optimal dispatching method, system and equipment for a distributed new energy distribution network provided by an embodiment of the present invention.

[0048] An optimal scheduling method for a distributed new energy distribution network provided by the present invention includes the following steps:

[0049] Step S1: Obtain the relevant parameters of the existing power system to prepare for the establishment of the model in the subsequent steps;

[0050] Step S2: Based on the relevant parameters of the power system, establish a two-layer model for optimal dispatching of the power grid based on the uncertainty of distributed new energy output, and convert the two-layer model into a single-layer linear model; convert the two-layer model into a single-layer linear model, Therefore, the solution of the double-layer model is converted into the solution of the single-layer model, which simplifies the solution process ...

Embodiment 2

[0096] In this embodiment, optimal scheduling is performed on the improved ieee33 node distribution network system. The structure of the distribution network is shown in the appendix Figure 4 . exist Figure 4 In the power distribution system of , nodes 13 and 21 contain wind power equipment with an installed capacity of 96MW. Node 25 contains photovoltaic equipment with an installed capacity of 50MW. Node 22 and node 32 contain traditional distributed power sources, which are coal-fired units. Node 1 is connected to the main grid. Through node 1, the distribution network can purchase or sell electricity with the main grid.

[0097] Applying the algorithm of the embodiment of the present invention, firstly, the electricity price of the main network in the electricity market and the new energy penalty electricity price (20$ / MW) are determined during the scheduling period. The main grid electricity price within 24 hours is as follows:

[0098]

[0099] The uncertainty ...

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Abstract

The invention discloses an optimal scheduling method for a distributed new energy power distribution network, and aims to solve the problem in optimal scheduling of a power distribution network containing a distributed new energy power supply under the maximum power supply capacity. The method comprises: establishing a power grid dispatching double-layer model considering the output uncertainty ofthe distributed new energy; converting the model with the lowest output cost of the lower-layer power distribution network into a linear constraint condition by adopting a KKT condition; converting the double-layer optimization model into a single-layer linear optimization problem; increasing the load capacity in a variable step size manner until the maximum load capacity is reached; and finally,obtaining a power distribution network optimization scheduling scheme considering the uncertainty of the distributed new energy output under the maximum load capacity. According to the method, the lowest power supply cost of the power distribution network and the worst new energy output uncertainty in the power market environment are considered, so that the power grid optimal scheduling scheme when the power supply capacity of the power distribution network is maximal is obtained, the calculation process is simplified, the calculation efficiency is greatly improved, and the method has guidingsignificance in practical application.

Description

technical field [0001] The invention relates to the technical field of power grid optimization dispatching, in particular to an optimal dispatching method, system and equipment of a distributed new energy distribution network. Background technique [0002] With the deteriorating environmental problems and the development of renewable energy technology, the proportion of renewable energy represented by wind energy and solar energy in the distribution network is increasing. With a high proportion of distributed renewable energy connected to the power system, its unique uncertainty and volatility have brought great challenges to the safe and stable operation of the power grid. Therefore, it is of great economic significance to consider the optimal dispatching problem of the distribution network under the worst uncertainty of new energy output. In addition, accurately calculating the maximum power supply capacity of distributed renewable energy distribution network with high pe...

Claims

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Application Information

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IPC IPC(8): H02J3/46
CPCH02J3/46
Inventor 白浩袁智勇雷金勇叶琳浩史训涛徐全黄安迪周长城
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
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