Simulation method and device for distributed inverter simulation system

A simulation system and simulation method technology, applied in circuit devices, AC network circuits, single-network parallel feeding arrangements, etc., can solve the problems of low simulation accuracy and simulation result reliability, simulation scale limitations, and inability to accurately reflect equipment operating characteristics problems with transient behavior

Active Publication Date: 2019-02-01
CHINA ELECTRIC POWER RES INST +4
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Problems solved by technology

Therefore, the establishment of a distributed inverter simulation system with a small step size for electromagnetic transient analysis is greatly limited in its simulation scale.
In order to solve this problem, a rough quasi-steady-state model of the power electronic unit is usually used in the prior art to model, but this rough quasi-steady-state model of the power electronic unit is very different from the operating characteristics of the actual physical device, and cannot be accurately Reflect the real equipment operating characteristics and transient behavior, the simulation accuracy and the credibility of the simulation results are low

Method used

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  • Simulation method and device for distributed inverter simulation system
  • Simulation method and device for distributed inverter simulation system
  • Simulation method and device for distributed inverter simulation system

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Embodiment 1

[0085] Embodiment 1 of the present invention provides a simulation method for a distributed inverter simulation system, the specific flow chart is as follows figure 1 As shown, the specific process is as follows:

[0086] S101: Acquire the output voltage and current of the distributed inverter physical system, and select the mathematical model corresponding to the type in the pre-built distributed inverter simulation system based on the type of the distributed inverter physical system, and obtain the distributed inverter physical system at the same time. The output voltage and current of the inverter simulation system;

[0087] S102: Determine the voltage correction matrix based on the obtained distributed inverter physical system and the output of each access point voltage from the distributed inverter simulation system, and based on the obtained distributed inverter physical system and distributed inverter simulation The current of each access point output by the system det...

Embodiment 2

[0121] Based on the same inventive concept, Embodiment 2 of the present invention also provides a simulation device for a distributed inverter simulation system, including an acquisition module, a determination module, and a correction module. The functions of the above modules are described in detail below:

[0122] The acquisition module is used to acquire the output voltage and current of the distributed inverter physical system, and select the corresponding mathematical model in the pre-built distributed inverter simulation system based on the type of the distributed inverter physical system , and obtain the output voltage and current of the distributed inverter simulation system at the same time;

[0123] The determination module is used to determine the voltage correction matrix based on the output voltage of each access point output by the distributed inverter physical system and the distributed inverter simulation system, and based on the distributed inverter physical s...

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Abstract

The invention provides a simulation method and device for a distributed inverter simulation system. According to the simulation method and device for the distributed inverter simulation system of theinvention, voltage and current outputted by a distributed inverter physical system, as well as voltage and current outputted by a distributed inverter simulation system are acquired; a voltage correction matrix and a current correction matrix are determined; and the voltage and current outputted by the distributed inverter simulation system are corrected, the real-time simulation of the multi-point access grid-connection of a plurality of distributed inverters can be realized, and simulation precision and the credibility of simulation results can be improved. The voltage and current outputtedby the distributed inverter simulation system are checked on the basis of the voltage and current outputted by the distributed inverter physical system, and therefore, error between the simulation system and the physical system can be decreased, and the high accuracy of simulation can be achieved. With the simulation method and device for the distributed inverter simulation system provided by thetechnical schemes of the present invention adopted, necessary premises can be provided for a high-density and large-scale distributed energy system in power flow control, reactive voltage, system stability and electric quality research.

Description

technical field [0001] The invention relates to the technical field of distributed power grid connection, in particular to a simulation method and device for a distributed inverter simulation system. Background technique [0002] Distributed power generation connected to the smart grid has entered a new stage of development in my country. Distributed renewable energy grid-connected units have the characteristics of small installed capacity, large quantity, and free and flexible control. The resulting high-density distributed inverter The system has brought new challenges to the operation and control of the power grid, and its impact on the power system has become increasingly serious. In order to realize the friendly coordination between distributed energy sources and the power grid, and then ensure the safe operation of the power system, it is very necessary to study the real-time simulation system of multi-distributed inverters with small step size and multi-nodes. [0003...

Claims

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Application Information

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IPC IPC(8): H02J3/38
CPCH02J3/38H02J2203/20Y02E10/56
Inventor 孙丽敬李蕊吴鸣盛万兴刘海涛张海季宇熊雄吕志鹏宋振浩郑楠赵婷蔺圣杰李冬森李运兵余述良
Owner CHINA ELECTRIC POWER RES INST
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