Three-stage optimal configuration method and system for multi-voltage-level alternating current and direct current hybrid system

An AC-DC hybrid, multi-voltage level technology, applied in the direction of circuit devices, electrical components, AC network circuits, etc., can solve the problems of power system safe and stable operation hazards, line overload, node voltage limit, etc., to reduce the amount of calculation, Effect of reducing computational complexity and improving economy

Active Publication Date: 2021-06-04
GUANGDONG POWER GRID CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, an unreasonable optimal configuration scheme may cause problems such as line overload and node voltage overlimit, which will endanger the safe and stable operation of the power system.

Method used

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  • Three-stage optimal configuration method and system for multi-voltage-level alternating current and direct current hybrid system
  • Three-stage optimal configuration method and system for multi-voltage-level alternating current and direct current hybrid system
  • Three-stage optimal configuration method and system for multi-voltage-level alternating current and direct current hybrid system

Examples

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no. 1 example

[0044] Such as figure 1 As shown, a three-stage optimal configuration method for a multi-voltage level AC-DC hybrid system in a preferred embodiment of the embodiment of the present invention includes at least the following steps:

[0045] S101. Obtain the topology structure and network parameters of the distribution network to which the AC-DC hybrid system belongs, and establish an operation model of the AC-DC hybrid system according to the topology structure and network parameters;

[0046] Specifically, the topological structure and network parameters of the distribution network to which the AC-DC hybrid system belongs are obtained, and the operation model of the AC-DC hybrid system is established according to the topological structure and network parameters; wherein, the input of the AC-DC hybrid system operation model is Renewable energy generation power, load, electricity price and energy storage cost of each bus; the output is the energy storage power of each bus, activ...

no. 3 example

[0109] An embodiment of the present invention also provides a computer terminal device, including: one or more processors;

[0110] a memory, coupled to the processor, for storing one or more programs;

[0111] When the one or more programs are executed by the one or more processors, the one or more processors implement the three-stage optimal configuration method for a multi-voltage level AC-DC hybrid system as described in any one of the above.

[0112] It should be noted that the processor can be a central processing unit (Central Processing Unit, CPU), and can also be other general-purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC), off-the-shelf programmable Gate array (Field-Programmable GateArray, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc., the general-purpose processor can be a...

no. 4 example

[0116] An embodiment of the present invention also provides a computer-readable storage medium on which a computer program is stored, wherein when the computer program is executed by a processor, the multi-voltage level AC-DC hybrid system as described in any one of the above is realized Three-stage optimization configuration method.

[0117] It should be noted that the computer program can be divided into one or more modules / units (such as computer programs, computer programs), and the one or more modules / units are stored in the memory and controlled by the The processor executes to complete the present invention. The one or more modules / units may be a series of computer program instruction segments capable of accomplishing specific functions, and the instruction segments are used to describe the execution process of the computer program in the terminal device.

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Abstract

The invention discloses a three-stage optimal configuration method for a multi-voltage-level alternating current and direct current hybrid system. The method comprises the steps that an economic index of the alternating current and direct current hybrid system is taken as an optimization target at a selectable power grid access point in a first stage, a renewable energy source and load basic scene is constructed based on a Monte Carlo method and a k-means method; meanwhile, the grid-connected point power factor, the power electronic transformer, the renewable energy power generation and the energy storage capacity of the alternating current and direct current hybrid system are optimized; in the second stage, the energy storage capacity, the energy storage charge-discharge judgment parameters, the maximum discharge power and the charge-discharge depth of each bus are further optimized by considering the relationship among the energy storage charge-discharge depth, the discharge power and the energy storage life; and in the third stage, a grid-connected advantage and inferior function is established according to the distribution network voltage margin and the network loss of the alternating current and direct current hybrid system after grid connection, and the optimal configuration scheme and the access point of the alternating current and direct current hybrid system are obtained by adopting basic scene calculation. According to the invention, collaborative optimization of capacity configuration, grid-connected access and operation strategies in the alternating current and direct current hybrid system can be realized.

Description

technical field [0001] The present invention relates to the technical field of distributed renewable energy power generation, in particular to a three-stage optimal configuration method, system, computer terminal equipment and computer-readable storage medium for a multi-voltage level AC-DC hybrid system. Background technique [0002] A microgrid is a small power system consisting of distributed power sources, loads, energy storage and control units. Compared with AC micro-grid and DC micro-grid, AC-DC micro-grid can minimize the power conversion loss between AC and DC networks and equipment, which is conducive to the integration of intermittent distributed energy into the micro-grid system. The AC-DC hybrid microgrid uses multi-port power electronic transformers for networking, which is a new type of flexible power distribution system developed in recent years. Power electronic transformers play an important role in AC and DC microgrids, such as reactive power compensation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38
CPCH02J3/381H02J2203/20Y02E60/60
Inventor 肖祥赵伟王伟张威谢宁岳菁鹏张弛曾杰
Owner GUANGDONG POWER GRID CO LTD
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