Distribution network distributed photovoltaic bearing capacity analysis and reduction method based on hybrid simulation
A distributed photovoltaic and hybrid simulation technology, applied in photovoltaic power generation, design optimization/simulation, AC network circuits, etc., can solve unfavorable power grid structure and rapid batch modification of parameters, cumbersome distribution network modeling, and lack of modeling process Standardize processing and other issues to achieve the effects of rapid generation and batch modification, high efficiency, and avoiding a large number of repetitive writing
Active Publication Date: 2022-07-15
NANJING UNIV OF POSTS & TELECOMM
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At present, although the grid-connected analysis of distributed photovoltaics through the linkage of OpenDSS and MATLAB software has been mentioned in some documents (such as patent applications CN109586297A, CN106786603A), they all need to be pre-written in OpenDSS software directly or indirectly. The DSS file containing the basic information of the power grid, considering the complex structure of the distribution network structure and the large number of nodes, it is cumbersome to carry out distribution network modeling through the DSS file based on script commands, lacks standardized processing of the modeling process, and is not conducive to the power grid Rapid batch modification of grid structure and parameters, so it is urgent to propose a method that does not need to preset DSS script files, but directly calls the OpenDSS simulation kernel in MATLAB to complete the distribution network standardized modeling and simulation scene dynamic modification method
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[0054] In order to make the content of the present invention easier to understand clearly, the present invention will be described in further detail below according to specific embodiments and in conjunction with the accompanying drawings.
[0055] figure 1 A schematic flowchart of a hybrid simulation method suitable for analysis and dynamic reduction of distributed photovoltaic bearing capacity of distribution network provided by an example of the present invention; figure 1 As shown, the method includes:
[0056] Step S1, establish a hybrid simulation framework of distribution network based on MATLAB and OpenDSS, which is divided into an upper intelligent algorithm layer and a lower power flow calculation layer, which are implemented in MATLAB and OpenDSS software respectively, and the two exchange data through the COM interface of OpenDSS software. Including the standardized definition method of the distribution network structure under distributed photovoltaic access, MA...
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The invention discloses a distribution network distributed photovoltaic bearing capacity analysis and reduction method based on hybrid simulation, and the method comprises the steps: firstly building a distribution network hybrid simulation framework based on MATLAB and OpenDSS, initializing the power flow of a distribution network through a COM port, and completing the regular batch modification of the parameters of electrical elements of a power grid through direct DLL; secondly, carrying out two-stage measurement and calculation on the distributed photovoltaic bearing capacity of the power distribution network on the premise of related constraint conditions; and finally, aiming at the regional power distribution network with insufficient bearing capacity, considering the voltage regulation and control capability of the on-load voltage regulating transformer, determining a dynamic reduction strategy of distributed photovoltaic output, and realizing minimum daily total reduction of the distributed photovoltaic of the regional power distribution network on the premise of ensuring safe and stable operation of the power grid. The problems that the modeling process of the power distribution network under high-ratio distributed photovoltaic access is tedious, and a novel intelligent control algorithm is difficult to nest are solved.
Description
technical field [0001] The invention relates to the technical field of energy and power, in particular to a method for analyzing and reducing the bearing capacity of distributed photovoltaics in a distribution network based on hybrid simulation. Background technique [0002] Driven by the "3060" dual-carbon goal, the photovoltaic industry has developed rapidly. Considering that compared with centralized photovoltaics, distributed photovoltaics can realize the local supply of electricity on the user side, avoid long-distance transmission of electricity, and reduce power grids. In this context, the pilot project represented by "the whole county of photovoltaics" has been promoted nationwide, so that distributed photovoltaics are connected to the medium and low voltage distribution network in large numbers, changing the operation mode of the traditional distribution network, while the high The distributed photovoltaic access of the penetration rate may have an adverse effect on...
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IPC IPC(8): H02J3/46H02J3/00G06F30/20G06F113/04
CPCH02J3/46H02J3/381H02J3/004G06F30/20H02J2203/10H02J2203/20H02J2300/24G06F2113/04Y02E10/56
Inventor徐霄高辉黎倩婷董安奇
OwnerNANJING UNIV OF POSTS & TELECOMM