Distributed power supply locating and sizing method
A technology of distributed power supply, location selection and capacity determination, applied in electrical components, emergency protection circuit devices, harmonic reduction devices, etc., can solve problems affecting normal operation, harmonic distortion, affecting production and life, etc., to optimize power quality. , the effect of optimizing the access capacity and reducing the negative impact
Active Publication Date: 2020-05-22
STATE GRID LIAONING ELECTRIC POWER RES INST +2
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Problems solved by technology
The access of distributed power to the distribution network changes the distribution of the power flow, which has the effect of absorbing or increasing the fault current, which makes the original protection device unusable and needs to be re-adjusted
Photovoltaics, wind turbines, energy storage, etc. are connected to the distribution network through inverters. A large number of power electronic equipment brings harmonic problems, resulting in harmonic distortion, which affects the production and life of some users who have high requirements for power quality.
The current site selection and capacity determination method does not fully consider the harmonic impact and protection coordination issues, resulting in the planning scheme unable to meet the power quality requirements in the distribution network, affecting the normal operation of the protection, and posing a great safety risk
Method used
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[0062] The following will clearly and completely describe the technical solutions in the examples of the present invention with reference to the drawings in the embodiments of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, other embodiments obtained by persons of ordinary skill in the art without making creative efforts all belong to the protection scope of the present invention.
[0063] Such as figure 1 as shown, figure 1 It is a schematic flow chart of the method of the present invention. The invention is a method for site selection and capacity determination of a distributed power supply, comprising the following steps:
[0064] Step 1: Input system parameters, the parameters include: bus data, branch data and distributed power installation location, distributed power harmonics;
[0065] Step 2: Initialize the parameters of th...
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The invention belongs to the technical field of power grid operation safety, and particularly relates to a distributed power supply locating and sizing method. The method comprises the following steps: inputting system parameters; initializing optimization algorithm parameters; randomly generating particles representing the installation position and capacity of the distributed power supply, and initializing the initial speed of each particle; forming basic admittance, and forming load flow calculation by adopting a fast load flow method; completing harmonic power flow calculation; completing protection cooperation calculation; calculating the fitness of each particle, and updating the global optimal particle and the individual optimal particle; judging whether an iteration frequency requirement is met or not; and determining the installation position and capacity of the distributed power supply according to the global optimal particle. According to the invention, the electric energy quality of the system after the distributed power supply is accessed can be effectively optimized, the negative influence of the distributed power supply on the original power distribution network protection configuration is reduced, and the access capacity of the distributed power supply is optimized.
Description
technical field [0001] The invention belongs to the technical field of power grid operation safety, and more specifically relates to a method for site selection and capacity determination of distributed power sources. Background technique [0002] When planning distribution network access to distributed power, it is necessary to consider the requirements of voltage constraints, line capacity, reliability indicators, etc., and integrate the investment needs of distributed power and economic and environmental benefits to establish an optimization function to determine the installation location of distributed power. and access capacity. The access of distributed power to the distribution network changes the distribution of the power flow, which has the effect of absorbing or increasing the fault current, which makes the original protection device unusable and needs to be re-adjusted. Photovoltaics, wind turbines, energy storage, etc. are connected to the distribution network t...
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IPC IPC(8): H02J3/46H02J3/01H02H7/26
CPCH02J3/46H02J3/01H02H7/262Y02E40/40
Inventor 孙峰李胜辉王刚张强迟成曾辉袁鹏李欣蔚王超
Owner STATE GRID LIAONING ELECTRIC POWER RES INST