Active power distribution system optimization scheduling method considering electric energy quality improvement

A technology of active power distribution and system optimization, applied in photovoltaic power generation, wind power generation, electrical components, etc., can solve the problem of not considering the voltage regulation ability of distributed power supply

Inactive Publication Date: 2017-08-04
XIAN UNIV OF TECH
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Problems solved by technology

[0005] The purpose of the present invention is to provide an active power distribution system optimization scheduling method that considers the improvement of power quality, overcomes the shortcomings of the existing single-objective optimization method that does not consider the distributed power supply voltage adjustment capability, and has a simple principle and is easy to implement

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  • Active power distribution system optimization scheduling method considering electric energy quality improvement
  • Active power distribution system optimization scheduling method considering electric energy quality improvement
  • Active power distribution system optimization scheduling method considering electric energy quality improvement

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Embodiment

[0116] Step 1) Choose the IEEE33 node power distribution system as an example for testing, such as figure 2 As shown, there are 10 distributed generation units and energy storage devices connected to the power distribution system, and their types and corresponding parameters are shown in Table 1. The load fluctuation curve and the output change curve of intermittent distributed generation units are as follows: image 3 shown. In this example, the scheduling period is 24 hours, and the scheduling unit duration is 15 minutes. The price of electricity purchased from the large power grid is 490 yuan / (MW·h), and the cost of gas turbine power generation is 283 yuan / (MW·h).

[0117] Table 1 Distributed power generation unit and energy storage device configuration

[0118]

[0119] Step 2) Set the parameters of the harmony search algorithm and the initial harmony library. In order to make the optimization model obtain better stability and faster convergence speed, the paramete...

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Abstract

The invention discloses an active power distribution system optimization scheduling method considering electric energy quality improvement. The active power distribution system optimization scheduling method specifically comprises the steps of obtaining a control variable of schedulable resource from the active power distribution system, establishing an active power distribution system optimization scheduling model, and then performing initialization on power distribution network parameters, and generating a new solution vector which satisfies constraint conditions, and namely a new harmonic, by three ways of memory library searching, local disturbance and random selection; and removing the worst solution from a harmonic library, meanwhile, putting the new harmonic vector into a harmonic memory library, repeatedly executing the step 4 of generating the new harmonic vector, and a step 5, generating new harmonic through iteration in many times so as to update the harmonic memory library, when updating achieves the maximum iteration number of times, outputting the optimal solution, namely the harmonic with the minimum target function value, and namely, the optimal scheduling scheme. The active power distribution system optimization scheduling method overcomes the shortcoming that the existing single-target optimization method does not consider the voltage regulation capability of the distributed power supply, and is simple in principle and easy to realize.

Description

technical field [0001] The invention belongs to the field of distributed power generation connected to power distribution systems, and relates to an optimal scheduling method for active power distribution systems considering the improvement of power quality. Background technique [0002] Problems such as energy shortage and environmental pollution drive the rapid development of clean energy power generation technology. In the future, the development of distribution network will inevitably need to make full use of clean renewable energy power generation to meet the inclusiveness of a large amount of clean renewable energy power generation, and to achieve a high degree of penetration and integration of renewable energy power generation. Full charge. However, as the penetration rate of distributed renewable energy generation continues to increase at all levels of the power system, the operation mode of the distribution network becomes more complicated compared with the original...

Claims

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Application Information

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IPC IPC(8): H02J3/38H02J3/50H02J3/32
CPCH02J3/383H02J3/386H02J3/32H02J3/50H02J2203/20Y02E10/56Y02E10/76
Inventor 段建东陈鲁鹏慕腾闫富平
Owner XIAN UNIV OF TECH
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