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Power grid subarea division method based on dynamic electricity prices

A technology for grid partitioning and electricity price, which is applied in power network operating system integration, electrical components, circuit devices, etc., and can solve problems such as failure to reflect congestion, difficulty in determining partitioning standards, and large differences in node electricity prices.

Active Publication Date: 2016-02-24
NORTHWEST BRANCH OF STATE GRID POWER GRID CO +1
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Problems solved by technology

The first type of method cannot reflect the congestion situation. The second type of method blocks the line changes with time, resulting in frequent changes in the partition results over time. The third type of method mainly emphasizes the sensitivity, so there will be a large difference in the price of nodes in a partition
The fourth type is a dynamic partition, and the partition standard is difficult to determine

Method used

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  • Power grid subarea division method based on dynamic electricity prices
  • Power grid subarea division method based on dynamic electricity prices
  • Power grid subarea division method based on dynamic electricity prices

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Embodiment Construction

[0050] The implementation of the grid partitioning method based on dynamic electricity price in the present invention will be described in detail below with reference to the accompanying drawings.

[0051] see figure 1 and figure 2 Shown, the present invention a kind of grid division method based on dynamic electricity price, comprises the following steps:

[0052] 1) According to different requirements for real-time and precision, set different sampling periods (1 month) and sampling intervals (15 minutes), and obtain the active power of the load and unit combination status from SCADA;

[0053] 2) Calculate the power transmission distribution factor matrix according to known network parameters, wherein the network parameters include line impedance and network correlation matrix.

[0054] 3) For each sampling period, solve the optimal power flow model with the goal of minimizing the power purchase cost of the grid company, the balance of power grid supply and demand, the sa...

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Abstract

The invention discloses a power grid subarea division method based on dynamic electricity prices. The method comprises the steps of: obtaining load data of certain time dimensions; calculating a power transmission and distribution factor matrix; using an optical trend model with the target of the lowest power purchase cost of a power grid company to calculate a marginal price of each node in a power grid in each time intervals; setting an expected subarea number, and carrying out initialization to ensure each subarea to be empty; improving a K-means clustering algorithm, and considering adjacency relations of nodes in the subarea division process; utilizing the improved K-means clustering algorithm to carrying out subarea division on the power grid based on the dynamic marginal price of each node; carrying out deviation analysis on a subarea division result, if the largest relative deviation is smaller than a set limit value, indicating that the subarea division is completed, and otherwise, changing the subarea number and carrying out subarea division again; and obtaining the nodes and the regional electricity price of each subarea. The subarea division obtained by the method ensures that nodes in the area are mutually connected and the electricity price loss of the nodes is in an allowable range, so that a market participant can conveniently carry out settling.

Description

【Technical field】 [0001] The invention relates to the field of grid power supply technology and optimization control, in particular to a method for grid partitioning. 【Background technique】 [0002] As the scale of the power system becomes larger, its structure becomes more and more complex. When the system load increases to a certain extent, line congestion will occur, resulting in different node marginal prices at both ends of the blocked line. But blocking tends to only occur frequently on certain lines. Therefore, the power grid can be managed in partitions, each region corresponds to an electricity price, and nodes in the region have the same or similar electricity prices. Regional electricity prices provide a more concise electricity price signal than node marginal electricity prices and more accurate electricity price signals than system marginal electricity prices. [0003] The node marginal electricity price changes with time, reflecting the constant change in lin...

Claims

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Application Information

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IPC IPC(8): H02J3/00H02J3/14
CPCH02J3/00H02J3/14H02J2203/20H02J2310/64Y02B70/3225Y04S20/222
Inventor 管晓宏陈天恩姚娜娜刘瑞丰高峰李焰吴江翟桥柱刘坤袁伟聂泽琳程兴瑞唐哲蔡婧白婕刘洁冰
Owner NORTHWEST BRANCH OF STATE GRID POWER GRID CO
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