Modeling method and synchronized prototype for vsc‑hvdc system

A VSC-HVDC and modeling method technology, applied in the field of synchronous prototypes, can solve the problems of slow simulation speed, low economic benefits, and high difficulty, and achieve the effects of reducing the amount of mathematical calculation, shortening the simulation time, and simplifying the topology structure

Active Publication Date: 2017-11-14
SHANGHAI JIAOTONG UNIV
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. The control strategy of the converter is diversified, and the modulation of the PWM signal is complicated;
[0005] 2. In the simulation model, the whole system model is complex and difficult to build;
[0006] 3. The simulation calculation workload is heavy and the simulation speed is slow;
[0007] 4. When developing a small synchronous prototype, the volume of the converter is large and the economic benefit is low

Method used

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  • Modeling method and synchronized prototype for vsc‑hvdc system
  • Modeling method and synchronized prototype for vsc‑hvdc system
  • Modeling method and synchronized prototype for vsc‑hvdc system

Examples

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Embodiment

[0142] The application of converter mean value model in VSC-HVDC system simulation model.

[0143] Figure 5 It is a simulation model of VSC-HVDC system based on the average value model of the converter. The left side of the model is the equivalent three-phase power supply of the wind turbine, the rectification side and the inverter side both use the average value model of the converter, and the right side is the power grid. The specific simulation parameters of the entire wind power grid-connected system are listed in Table 1:

[0144] Table 1 Simplified system simulation parameters

[0145]

[0146] Note: P--rated apparent power;

[0147] u f -- AC line voltage;

[0148] Udc--DC voltage;

[0149] f--grid frequency;

[0150] L--inductance value, R--resistance, C--capacitance;

[0151] The simulation results are shown in the accompanying drawings, where Figure 6 To simplify the model active power waveform, Figure 7 is the active power waveform of the traditional...

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Abstract

The invention provides a modeling method suitable for VSC-HVDC system. The modeling method suitable for the VSC-HVDC system comprises the steps: step 1: average simplifying rectification loop; step 2: average simplifying inverter loop; and step 3: average simplifying direct current transmission loop. The invention further provides a relevant converter and a synchronous prototype. The rectification loop, direct current transmission loop and inverter loop of the synchronous prototype use an average value model to form a whole converter average value model. The modeling method suitable for the VSC-HVDC system is suitable for the grid-connected wind farm, and can satisfy most simulation requests under the situation without involving the converter control method.

Description

technical field [0001] The invention relates to the field of electrical engineering, in particular to a modeling method and a synchronous prototype suitable for a VSC-HVDC system. Background technique [0002] In recent years, offshore wind power generation and its transmission have become a hot spot in wind power and other new energy industries. With the rapid development of power electronics technology, the voltage source converter type DC transmission system (VSC-HVDC) based on the voltage source converter (VSC) and series insulated gate bipolar transistors (IGBT) is also becoming more and more mature, and has become an important component of offshore wind power. A new means of delivery. At present, the existing technology still adopts the traditional model, and conducts real-time dynamic simulation based on computer simulation software or develops a small synchronous prototype of 1:10 or 1:100 to study the VSC-HVDC system of offshore wind power generation. The converte...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50H02J3/36
CPCY02E60/60
Inventor 江斌开王志新
Owner SHANGHAI JIAOTONG UNIV
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