Power distribution network absorption capability assessment method and device based on distributed power supply output high-dimensional joint distribution

A technology of distributed power supply and consumption capacity, which is applied in the direction of resources, single-network parallel feeding arrangements, instruments, etc. In order to achieve the effect of improving the level of consumption capacity, releasing the consumption potential and reducing the impact

Pending Publication Date: 2022-01-04
STATE GRID JIANGSU ELECTRIC POWER CO ELECTRIC POWER RES INST +2
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  • Application Information

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Problems solved by technology

However, due to the complexity of distributed generation output correlation modeling, the existing research has not considered the impact of the correlation between distributed generation output on the distribution network's accommodation capacity.
Obviously, ignoring the correlation between distributed power sources will bring large errors to the capacity evaluation results

Method used

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  • Power distribution network absorption capability assessment method and device based on distributed power supply output high-dimensional joint distribution
  • Power distribution network absorption capability assessment method and device based on distributed power supply output high-dimensional joint distribution
  • Power distribution network absorption capability assessment method and device based on distributed power supply output high-dimensional joint distribution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0191] Taking a 38-node urban power distribution system in Nantong City, Jiangsu Province as the research object, its ability to absorb related wind power resources is investigated. The network structure of the 38-node power distribution system is as follows: image 3 shown. In this distribution network, 6 adjacent wind power stations are planned to be built. The geographical locations of the wind power stations are as follows: image 3 As shown, access nodes 17, 18, 21, 34, 36 and 38, respectively. The maximum distributed power installed capacity of each node Set to 10MW. Ignore the wake effects of small fans.

[0192] (1) Stochastic optimization model

[0193] Firstly, in the above-mentioned Nantong 38-node distribution network, an example test is carried out on the evaluation model of distributed generation consumption capacity of distribution network considering the correlation between distributed generation and load, and the influence of four different correlation m...

Embodiment 2

[0212] Taking a 59-node 10kV rural distribution network near Suzhou as an example, the influence of the correlation between distributed photovoltaic output on the photovoltaic consumption capacity of the distribution network is studied. The wiring diagram and geographical distribution of the distribution network are as follows: Figure 5 shown. Considering that the correlation between distributed photovoltaic output is related to the actual geographical location of photovoltaics, taking the installation of 8 photovoltaic power stations in the distribution network as an example to study the consumption capacity under 4 different station spacing configuration schemes. The configuration schemes of these four photovoltaic power plants are as follows: Figure 6 As shown in (a), (b), (c) and (d), the average station distance between photovoltaic power stations is 0.87, 2.16, 3.05, 4.26km, respectively. The marginal distribution of photovoltaic output is used as the distribution of...

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Abstract

The invention discloses a power distribution network absorption capability evaluation method and device based on distributed power supply output high-dimensional joint distribution, and the method comprises the steps: generating a high-dimensional joint distribution output probability model considering the correlation based on the correlation between a distributed power supply and a load, and carrying out the sampling to generate a scene set; establishing a distribution network distributed power supply stochastic programming absorption capability evaluation model considering the correlation between the distributed power supply and the load, eliminating an infeasible scene, establishing an opportunity constraint programming model for distributed power supply absorption capability evaluation, and solving a problem based on a Benders decomposition method and a cutting plane method. The method can fully consider the influence of the smoothing effect, release the absorption potential of the power distribution network, quantify the maximum capacity of the distributed power supply which can be absorbed by the power distribution network, reduce the influence on the safe and stable operation of the system caused by excessive access of the distributed power supply, and improve the absorption capability level.

Description

technical field [0001] The invention belongs to the technical field of distribution network distributed power supply accommodation, and specifically relates to a distribution network accommodation capacity evaluation method and device based on high-dimensional joint distribution of distributed power output. Background technique [0002] After a high proportion of distributed renewable energy is connected to the distribution network, due to the random intermittent characteristics of the renewable energy itself and a series of problems such as the voltage and capacity exceeding the limit caused by the reverse power flow, the operation of the distribution network has brought greater security. risk. In order to prevent the hidden dangers brought by the excessive construction of distributed power generation to the safe operation of distribution network, it is urgent to determine the current distribution network's ability to accommodate distributed power generation, that is, to ev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/04G06Q10/06G06Q50/06H02J3/38
CPCG06Q10/04G06Q10/0639G06Q50/06H02J3/38Y02E40/70Y02P90/82Y04S10/50
Inventor 李强杨俊义唐伟佳袁越吴涵马欣侯语涵
Owner STATE GRID JIANGSU ELECTRIC POWER CO ELECTRIC POWER RES INST
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