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Multi-stage planning method and system for urban power distribution network
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Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A distribution network, multi-stage technology, applied in the direction of system integration technology, information technology support system, electrical components, etc., can solve the problems of unfavorable system safety and stability, high difficulty of implementation, etc., and achieve the effect of reducing the difficulty of solving and improving reliability
Pending Publication Date: 2020-10-30
JINING POWER SUPPLY CO OF STATE GRID SHANDONG ELECTRIC POWER CO +1
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By considering the microgridoperation mode in the distribution network planning process, on the one hand, the efficient utilization of distributed energy and the highly reliable supply of various energy forms can be realized, and on the other hand, the power outage loss caused by the fault of the distribution network line can also be reduced. , to improve the reliability of the distribution network, but the microgridoperation mode adopted by the current urban distribution network planning method allows the load nodes containing controllable distributed power sources to be connected to adjacent nodes to form a distribution network, while the distributed power The temporary networking of adjacent nodes requires protection and cooperation, which is difficult to implement and is not conducive to the security and stability of the system
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Embodiment 1
[0038] In one or more embodiments, a multi-stage planning method for urban distribution network is disclosed, refer to figure 1 , Including the following steps:
[0039] (1) Obtain transmission line related data, substation related data, load data and distributed power data in the area to be planned;
[0040] Specifically, the line data includes: line length, line unit length impedance, line unit length construction cost, line unit length capacity.
[0041] Substation data includes: substation capacity, substation investment cost, and substation power purchase cost.
[0042] Load data includes: results from load forecasting. Load forecasting is a prerequisite for distribution network planning, which is completed by a separate functional module before distribution network planning.
[0044] (2) Linearize the indicator of insufficient power, the ave...
Embodiment 2
[0170] In one or more embodiments, a multi-stage planning system for urban distribution network is disclosed, including:
[0171] A device for obtaining transmission line-related data, substation-related data, load data, and distributed power data in the area to be planned;
[0172] A device used to linearize the indicator of insufficient power, the average number of power outages of users, and the average time of user outages respectively;
[0173] A device used to calculate power outage losses based on linearized indicators;
[0174] A device used to establish a multi-stage planning model of the urban distribution network with the objective function of minimizing the investment cost, operating cost and power outage loss in the entire planning cycle;
[0175] A device for solving the multi-stage planning model of the urban distribution network to obtain a multi-stage planning scheme of the urban distribution network;
[0176] It is a device for optimizing the location and capacity of di...
Embodiment 3
[0179] In one or more embodiments, a terminal device is disclosed, including a server, the server including a memory, a processor, and a computer program stored on the memory and running on the processor, and the processor executes the The program implements the multi-stage planning method of the urban distribution network in the first embodiment. For the sake of brevity, I will not repeat them here.
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Abstract
The invention discloses a multi-stage planning method and system for an urban power distribution network. The method comprises the steps: obtaining power transmission line related data, transformer substation related data, load data and distributed power supply data of a to-be-planned area; performing linearizationprocessing on the power shortage index, the user average power failure frequency and the user average power failure time index; establishing a multi-stage planning model of the urban power distribution network by taking minimization of investment cost, operation cost and power failure loss in the whole planning period as a target function; solving the urban power distribution network multi-stage planning model to obtain an urban power distribution network multi-stage planning scheme; based on the planning scheme, in each planning stage, optimizing the location sizing and the grid structure of the distributed power supply, and performing operation optimization and distribution network reconstruction of the distributed power supply according to different load scenes. According to the method, the solving difficulty of the planning model can be remarkably reduced, and the reliability of solving the network structure is improved.
Description
Technical field [0001] The invention relates to the technical field of urban power distribution network planning, in particular to a multi-stage planning method and system for urban power distribution network. Background technique [0002] The statements in this section merely provide background information related to the present invention, and do not necessarily constitute prior art. [0003] Urban distributed network (UDN) planning is a comprehensive consideration of distributed generation (DG) and energy storagesystem (ESS) site selection and capacity, grid expansion, and distribution network dynamics. Collaborative planning of reconfiguration (distribution network reconfiguration, DNR). [0004] With the increasing requirements of distribution network users for power supply quality, reliability indicators have become an indispensable and important factor in the process of distribution network expansion planning (DNEP). Since the reliability index is mainly calculated based on ...
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