A collaborative planning method of optical/storage and planning islands for distribution networks considering the risk of loss of load

A technology of load loss and distribution network, which is applied in the field of multi-objective planning of distribution network, can solve the problems of not considering switches, insufficient calculation accuracy of economy and reliability, and not considering the difference of users' load loss loss, etc.

Inactive Publication Date: 2019-01-04
国网山西省电力公司经济技术研究院 +1
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Problems solved by technology

[0004] (1) There are two ways to deal with the reliability index in the objective function, one is to convert the lost load loss into the reliability cost into the objective function, and the other is to use the reliability index as a multi-objective, but most of them do not consider the user failure. Variation in load loss;
[0005] (2) The switch is not considered in the planning,

Method used

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  • A collaborative planning method of optical/storage and planning islands for distribution networks considering the risk of loss of load
  • A collaborative planning method of optical/storage and planning islands for distribution networks considering the risk of loss of load
  • A collaborative planning method of optical/storage and planning islands for distribution networks considering the risk of loss of load

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Embodiment Construction

[0021] Step 1: Establish the optical / storage and switch coordination optimization model with the least total cost and the lowest risk of load loss as the multi-objective function, with the system's safe and stable operation, reliability, etc. as constraints

[0022] Objective function:

[0023] (1) The total cost of network resource collaborative planning is the least

[0024] The total cost of network source collaborative planning mainly comes from the investment cost of photovoltaics, energy storage and switchgear and the operating cost of distribution network. Considering the time value of funds, the total cost can be expressed by formula (1)

[0025] (1)

[0026] In the formula: C invest for the investment cost; C loss is the network loss and is the annual cost of distribution network active network loss; respectively:

[0027]

[0028] (2)

[0029] In the formula: C PV , C BESS , C CB Investment costs for photovoltaics, energy storage and switchgear,...

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Abstract

With the implementation of national new energy policy and electric power system reform, a large number of distributed energies are connected to the distribution network in various forms. In order to ensure the reliability of power supply for power users, power grid enterprises need to consider the uncertainty of new energy sources and provide them with the necessary backup, but to some extent, this reduces the utilization rate of equipment. In order to avoid this negative effect, the distribution network should adopt active operation strategy under the condition of fault, and fully dispatch distributed energy to participate in fault recovery, in order to improve the load rate of distribution network equipment. The invention establishes a programming model which takes the total investment cost is minimum, the risk of losing load is minimum as multi-objective, voltage stability, power flow does not cross line and the like as constraint conditions, and adopts a programming model based onNSGA-II, the multi-objective evolutionary algorithm is used to solve the problem. The range of planned islands and the location and capacity of photovoltaic and energy storage batteries in the islandsare taken into account in the planning. The validity of the model and the method established by the invention is verified by simulation.

Description

technical field [0001] The invention belongs to the field of distribution network multi-objective planning, and relates to site selection and capacity determination of photovoltaics and energy storage and planning of island ranges. Background technique [0002] With the implementation of the national new energy policy and the reform of the power system, a large number of distributed energy sources are connected to the distribution network in various forms; in order to ensure the reliability of power supply for power users, grid companies need to consider the uncertainty of new energy sources and provide It provides the necessary backup, but this reduces the utilization rate of equipment to a certain extent; in order to avoid this negative impact, the distribution network should adopt an active operation strategy in the event of a fault, and fully dispatch distributed energy resources to participate in fault recovery in order to improve The load rate of distribution network e...

Claims

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Application Information

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IPC IPC(8): H02J3/38
CPCH02J3/383H02J2203/20Y02E10/56Y02P80/20
Inventor 任秀生秦浩刘鑫宋巍刘文霞李春晖王佳伟王正赵海波郭静申泽渊王亚臣张嘉
Owner 国网山西省电力公司经济技术研究院
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