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Comprehensive operation control method for optical storage system in regional power distribution network

A technology of operation control and optical storage system, applied in energy storage, photovoltaic power generation, AC network load balancing, etc., can solve the problems of node voltage exceeding limit, increasing photovoltaic penetration rate, and power reverse flow.

Inactive Publication Date: 2020-04-10
STATE GRID ZHEJIANG ELECTRIC POWER CO LTD JIAXING POWER SUPPLY CO +1
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Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of power backflow and node voltage overrun caused by the increase of distribution network load and the increase of photovoltaic penetration rate, and proposes a comprehensive operation control method for solar-storage systems in regional distribution networks. The method can ensure that when the photovoltaic penetration rate is high, the node voltage still does not exceed the voltage limit value, and the user's arbitrage is maximized after the energy storage dispatch

Method used

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  • Comprehensive operation control method for optical storage system in regional power distribution network
  • Comprehensive operation control method for optical storage system in regional power distribution network
  • Comprehensive operation control method for optical storage system in regional power distribution network

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Embodiment

[0104] Example: Figure 5 An example system of the invention is shown; a 41 node network with a voltage rating of 27.6 kV, a total load peak of 13.2 mV, and a power reference of 10 mV. The daily active load curve of the system is as follows Image 6 shown. The power factor is 0.93; the photovoltaic power generation is connected to three nodes: 19, 28 and 40; the specific output curve is as follows Figure 7 shown.

[0105] Such as figure 1 As shown, a method flowchart of a comprehensive operation control method for an optical-storage system in a regional distribution network, the method includes the following steps:

[0106] S1. Obtain the upper and lower limits of the voltage of each node in the power distribution network and the current voltage value of each node.

[0107] S2. Establish a voltage evaluation model for distribution network nodes; follow the steps below:

[0108] S21. Establishing a remaining life model of the battery energy storage system;

[0109] Set ...

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Abstract

The invention discloses a comprehensive operation control method for an optical storage system in a regional power distribution network. The method comprises the following steps: S1, obtaining the voltage upper and lower limits of each node in a power distribution network and the current voltage value of each node; S2, establishing the voltage evaluation model of the nodes of the power distribution network; S3, establishing a voltage control model; S4, establishing an energy storage arbitrage model; S5, determining whether a current voltage exceeds the standard or not according to the collected voltage limit value, constructing an evaluation matrix, comprehensively selecting the optimal evaluation energy storage as a control object, and calculating the charging and discharging power according to the overvoltage; S6, when the voltage is safe, if the current battery capacity and power are still remained, continuously operating an arbitrage part, otherwise, finishing the operation controlin the sampling period; and S7, selecting charging and discharging operation according to the peak-valley characteristics of the current electricity price, and selecting and controlling the battery through the constructed evaluation matrix. According to the method, under the condition that the photovoltaic permeability is relatively high, the arbitrage of the user after energy storage schedulingis maximized.

Description

technical field [0001] The invention relates to the technical field of distribution network energy storage, in particular to a comprehensive operation control method for an optical storage system in a regional distribution network. Background technique [0002] With the gradual increase of photovoltaic penetration rate, the problems of power reverse flow and node voltage overrun are becoming more and more serious, which put forward higher requirements for the safe and economical operation of distribution network. At present, there are three main methods to solve the voltage problem caused by high-permeability photovoltaics: reducing photovoltaic output, installing reactive power compensation equipment, and applying energy storage systems. Among them, the reduction of photovoltaic output reduces the utilization of photovoltaic resources and the income of photovoltaic installation users. In the long run, this is not conducive to the rapid and sustainable development of photov...

Claims

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Application Information

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IPC IPC(8): H02J3/32
CPCH02J3/32Y02E10/56Y02E70/30
Inventor 郑涛黄宏盛李红日王腾达施文煇周会平彭坤袁均祥朱涌泉何昱张宏陈兵邹会权陈万昆王康贵周骅唐晓杰李冲雷强张建平
Owner STATE GRID ZHEJIANG ELECTRIC POWER CO LTD JIAXING POWER SUPPLY CO
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