A Distributed Power Planning Method for Improving Voltage Quality of Distribution Network

A distributed power supply and distribution network technology, applied in the direction of AC network voltage adjustment, electrical components, circuit devices, etc., can solve the problems of reducing voltage compensation equipment investment, reducing the cost of power grid construction and rural grid transformation, low voltage, etc., to achieve Improve voltage quality, save secondary investment, and be easy to operate

Active Publication Date: 2020-06-30
STATE GRID HUBEI ELECTRIC POWER RES INST +1
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Problems solved by technology

[0004] The present invention provides a distributed power supply planning method for improving the voltage quality of the distribution network, which is used to solve the problem that the voltage of the end user of the line far away from the transformer in the distribution network area, especially the rural network area, is too low. Methods While considering the investment amount of the distributed power generation planning scheme, the voltage compensation capability of the distributed power generation in the configuration process is fully utilized, which reduces the investment in other voltage compensation equipment and reduces the cost of power grid construction and rural power grid transformation.

Method used

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  • A Distributed Power Planning Method for Improving Voltage Quality of Distribution Network
  • A Distributed Power Planning Method for Improving Voltage Quality of Distribution Network
  • A Distributed Power Planning Method for Improving Voltage Quality of Distribution Network

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Experimental program
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Embodiment 1

[0066] as attached figure 1 As shown, a distributed power generation planning method to improve the voltage quality of the distribution network includes the following steps:

[0067] A. Collect the electricity consumption data of users in the planning area, and set the peak level of the electricity consumption data within the long-term planning period according to the current electricity consumption data;

[0068] B. Collect the parameters of the grid in the planning area, including grid connection topology, line impedance parameters, transmission limit power, and voltage level;

[0069] C. Set the maximum investable capacity of distributed power in the planning area, the unit of capacity is kW, set the upper and lower limits of voltage compensation in the planning area, and the unit of voltage is P.U.;

[0070] D. Using the objective function and constraints of formula (1'-6') to construct the calculation model of the optimal planning scheme of distributed power generation c...

Embodiment 2

[0073] by figure 2 The distribution network area shown is a specific implementation description, and distributed power supply is configured for 0-32 nodes in the area to improve the voltage level in the entire network. A distributed power planning method for improving the voltage quality of a distribution network, comprising the following steps:

[0074] I. Collect the electricity consumption data of users in the planning area, and set the peak level of the electricity consumption data within the long-term planning period according to the current electricity consumption data. The typical load characteristic curve collected by node 1 is as follows image 3 shown;

[0075] II. Collect the parameters of the grid in the planning area, including grid connection topology, line impedance parameters, transmission limit power, voltage level, line topology such as figure 2 As shown, the impedance parameters are shown in Table 1, the transmission power of the line in this area is 550...

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Abstract

The invention provides a distributed generation planning method for improving the voltage quality of a distribution network. The method comprises the following steps of: collecting power consumption data of users in a planning area; according to the current power consumption data, setting a peak level of power consumption data in a long-term planning period; acquisition of power grid parameters inthe planning area; Setting the maximum investable capacity of the distributed generation in the planning area and the upper and lower limits of voltage compensation in the planning area; a computational model for optimal planning of distributed generation considering voltage compensation capability is constructed. Set genetic algorithm parameters: generation gap, mutation probability, crossover probability, maximum evolutionary algebra, population size, input the collected data into the calculation program, and get the distributed generation planning scheme and voltage compensation effect. This method makes full use of the regulating potential of distributed generation in improving voltage, avoids the problems of secondary planning, secondary compensation and secondary investment caused by the low voltage problem at the end of transmission line, and reduces the planning workload and equipment investment cost.

Description

technical field [0001] The invention relates to the field of voltage management and power supply planning, in particular to a distributed power supply planning method for improving the voltage quality of a distribution network. Background technique [0002] With economic development and social progress, people gradually change from basic living needs to quality living needs, among which the quality of electricity consumption is closely related to everyone's life. Due to my country's vast territory and huge investment in power infrastructure, the distribution of power grid infrastructure investment areas is uneven. Many areas, especially rural power grid areas, still have a large number of low-voltage problems, resulting in insufficient power voltage for residents during peak loads. It is also difficult to start the household load, seriously affecting the quality of life and satisfaction of residents. As the government and power supply companies attach importance to this issu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/00H02J3/12
CPCH02J3/00H02J3/12H02J2203/20
Inventor 丁凯李伟胡羽川钱一民王易
Owner STATE GRID HUBEI ELECTRIC POWER RES INST
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