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Reactive power optimization scheduling method for power distribution network containing distributed power supply

A technology of distributed power generation and optimal scheduling, applied in the field of electric power, can solve problems such as high grid loss, low grid voltage quality, and unreasonable reactive power distribution

Pending Publication Date: 2021-06-11
YGSOFT INC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the above analysis, the embodiment of the present invention aims to provide a distributed power distribution network reactive power optimization scheduling method to solve the existing problems of unreasonable reactive power distribution, low voltage quality in the grid, and high grid loss. question

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  • Reactive power optimization scheduling method for power distribution network containing distributed power supply
  • Reactive power optimization scheduling method for power distribution network containing distributed power supply
  • Reactive power optimization scheduling method for power distribution network containing distributed power supply

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Embodiment 1

[0094] A specific embodiment of the present invention discloses a reactive power optimal dispatching method for a distribution network containing distributed power sources, such as figure 1 shown, including the following steps:

[0095] S1. In the distribution network, set a preset number of capacitor banks and distributed power sources.

[0096] Among them, before the distribution network is equipped with capacitor banks and distributed power sources, the existing distribution network reactive power optimization model (such as patent CN104600714B) is used for power flow calculation; the capacitor bank is set at the node voltage and reactive power point (node The node whose voltage or reactive power is lower than the preset value); the distributed power supply is set at a relatively low point of active power (the node whose active power is lower than the preset value).

[0097] S2. According to the relationship between the energy loss of the distribution network and the contr...

Embodiment 2

[0102] Optimizing on the basis of embodiment 1, step S2 further includes:

[0103] S21. Select control parameters that affect the energy loss of the distribution network. The control parameters include the switching capacity C of the capacitor bank at the beginning of each time period i,t , balanced node voltage U sw,t , Voltage control type DG machine terminal voltage output U DG,t , reactive power output Q of reactive power compensation type DG DG,t . Among them, t represents time t, and i represents the i-th capacitor.

[0104] S22. Establish a mathematical model of the relationship between the control parameters and the energy loss of the distribution network within a day

[0105]

[0106] In the formula, f is the energy loss of the distribution network in one day, T t is the tth hour in a day, P loss,t is the distribution network energy loss function at time t.

[0107] Exemplarily, T t =1h,P loss,1 is the energy loss of the distribution network at point 1, e...

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Abstract

The invention relates to a reactive power optimization scheduling method for a power distribution network containing a distributed power supply, belongs to the technical field of electric power, and solves the problems of unreasonable reactive power distribution, low voltage quality in a power grid and high power grid loss in the prior art. The method comprises the following steps of setting a certain number of capacitor banks and distributed power supplies in the power distribution network; establishing a reactive static optimization model of the power distribution network according to the relationship between the energy loss of the power distribution network and the control parameters, performing load flow calculation, obtaining the switching capacity increment of each capacitor bank, and further obtaining a pre-action time table of each capacitor bank; partitioning the topological structure of the power distribution network, establishing a reactive dynamic optimization model of the power distribution network by taking the minimum energy loss of the power distribution network in each time period as a target according to the pre-action time table, performing load flow calculation, and determining a day-ahead scheduling scheme of each capacitor bank and a distributed power supply output scheme; and executing the day-ahead scheduling scheme and the distributed power supply output scheme.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to a reactive power optimization scheduling method for a distribution network including distributed power sources. Background technique [0002] In the distribution network, there have been phenomena such as unreasonable distribution of reactive power, low investment in reactive power compensation equipment, and low investment rate for a long time, resulting in problems such as low voltage quality and high power loss in the power grid. Among them, the voltage quality directly affects industrial and agricultural production and power grid operation. If the voltage quality cannot meet the requirements, the product quality will decline, the transmission capacity of the power grid will be weakened, and the network loss of the power grid will increase. Excessive power grid loss will bring great economic losses to the power sector, resulting in an increase in electricity prices. I...

Claims

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Application Information

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IPC IPC(8): H02J3/18H02J3/48H02J3/50
CPCH02J3/1821H02J3/48H02J3/50H02J2203/20Y02E40/30
Inventor 颜文涛宋小松陈志欣段雪静
Owner YGSOFT INC