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Natural gas power station direct current micro-grid hybrid CPU multiple bidirectional DC port device and implementation method thereof

A technology for direct current microgrid and natural gas station, which is applied to the field of bidirectional DC port devices of direct current microgrid of natural gas power station, can solve the problems of slow dynamic response of natural gas generator set, reduced power quality of direct current microgrid, consumption of natural gas generator capacity, etc., and achieves improvement. Voltage quality, suppression of harmonic power disturbances, and the effect of maintaining constant voltage

Active Publication Date: 2015-05-06
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the slow dynamic response of the existing natural gas generator set, and at the same time introduce a large number of even-order fundamental frequency harmonics by using the non-load and unbalanced load supported by the inverter, which reduces the power quality of the DC microgrid and consumes the capacity of the natural gas generator , the problem of reducing system efficiency, providing a natural gas station DC microgrid hybrid CPU multiple bidirectional DC port device and its implementation method

Method used

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  • Natural gas power station direct current micro-grid hybrid CPU multiple bidirectional DC port device and implementation method thereof
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  • Natural gas power station direct current micro-grid hybrid CPU multiple bidirectional DC port device and implementation method thereof

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specific Embodiment approach 1

[0031] Specific implementation mode one: the following combination figure 1 This embodiment is described. The natural gas station DC microgrid hybrid CPU multiple bidirectional DC port device in this embodiment includes a DSP command calculation module 1, an FPGA logic signal processing module 2, a multiple DC / DC power conversion module 3, and a detection and protection module. Module 4, control sampling and signal setting module 5, CAN bus communication module 6 and energy storage module 7;

[0032] Both ends of the multiple DC / DC power conversion module 3 are respectively connected to the natural gas station DC microgrid and the energy storage module 7,

[0033] The control sampling and signal setting module 5 is used to measure the information of the DC microgrid of the natural gas station and the current information of the multiple DC / DC power conversion module 3. The control sampling and signal setting module 5 is respectively connected with the DSP instruction calculatio...

specific Embodiment approach 2

[0036] Specific implementation mode two: the following combination figure 2 Describe this embodiment, the implementation method of the natural gas station DC microgrid hybrid CPU multiple bidirectional DC port device described in this embodiment, the specific process of the method is:

[0037] Step 1, using the DSP instruction calculation module 1 to perform closed-loop control calculations using floating-point calculations to generate PWM modulated waves;

[0038] Step 2, the DSP command calculation module 1 sends the PWM modulation wave generated in step 1 to the FPGA logic signal processing module 2 through a 16-bit parallel bus;

[0039] Step 3, FPGA logic signal processing module 2 according to the quantity of parallel power changer in the multiple DC / DC power conversion module 3, generates corresponding PWM to move to the carrier signal with the received PWM modulated wave;

[0040] Step 4, FPGA logic signal processing module 2 synchronously replicates the received PWM...

specific Embodiment approach 3

[0047] Specific implementation mode three: the following combination figure 2 Illustrate present embodiment, present embodiment is described further to embodiment two, the specific process that FPGA logic signal processing module 2 described in step 5 judges whether to be in safe range according to the sampling information that control sampling and signal setting module 5 obtains is:

[0048] Step 1-1, controlling the sampling and signal setting module 5 to obtain the current information of the bidirectional DC port device;

[0049] Step 1-2, the FPGA logic signal processing module 2 uses a digital low-pass filter to filter the information obtained in step 1-1;

[0050] Step 1-3, FPGA logic signal processing module 2 judges whether there is an alarm in the bidirectional DC port device, if otherwise, execute step 1-4, and if so, execute step 1-8;

[0051] Step 1-4, FPGA logic signal processing module 2 judges whether the number of times of failure n in the bidirectional DC po...

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Abstract

The invention discloses a natural gas power station direct current micro-grid hybrid CPU multiple bidirectional DC port device and implementation method thereof and relates to a natural gas power station direct current micro-grid bidirectional DC port device, the natural gas power station direct current micro-grid bidirectional DC port device is used for solving the problems of the existing natural gas engine set that the dynamic response is slow, the non load and unbalance load supported by the inverter import a lot of even order fundamental frequency harmonic, the quality of electric energy of the direct current micro-grid is reduced, the natural gas generator capacity is consumed and the system efficiency is reduced. The natural gas power station direct current micro-grid bidirectional DC port device comprises a DSP instruction calculating module, a FPGA logic signal processing module, a multiple DC / DC power conversion module, a detecting and protecting module, a control sampling and signal setting module, a CAN bus communication module and an energy storing module; the device adopts the control method as follows: the master / slave mode compensation control, isolated mode energy storing surplus capacity balance compensation control and direct current bus DC port harmonic suppression control. The device is used for offering the power for natural gas power station in a bidirectional mode.

Description

technical field [0001] The invention relates to a bidirectional DC port device of a natural gas power station DC micro-grid. Background technique [0002] The natural gas power station is a relatively high-power DC power supply system formed by several natural gas generator sets after rectification modules, which can provide reliable support for various DC loads and inverter units. Natural gas generator sets have lower carbon and sulfur emissions than traditional diesel generator sets, and at the same time, the price of natural gas is lower than that of diesel under the same energy. Therefore, the use of natural gas generating set system has great advantages in energy saving, emission reduction and power generation cost reduction. [0003] However, the dynamic power adjustment capability of natural gas generator sets is worse than that of diesel generator sets. This slow dynamic response restricts its application in the occasion of impact load in the power supply network. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J1/14H02J13/00H02J1/02
CPCH02J1/02H02J1/102H02J1/106H02J1/14H02J7/345Y02B90/20
Inventor 段建东李树生孙力王志刚国海峰王令金李寻迹郭安东张润松刘龙海赵克吴凤江安群涛
Owner HARBIN INST OF TECH
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