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Energy internet network and energy internet method for direct-current power systems

A technology of DC power supply system and energy interconnection, which is applied in the direction of parallel operation of DC power supplies and load balancing in DC networks, etc. It can solve problems such as inability to modularize direct expansion, low reliability, dynamic performance and stability cannot be guaranteed, etc.

Active Publication Date: 2016-05-11
SHENZHEN AEROSPACE NEW POWER TECH
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

Therefore, it has inherent defects such as low reliability, high cost
The dynamic performance and stability of this energy distribution method are not guaranteed
In addition, modular direct expansion cannot be performed. When multiple systems are connected in parallel, the software algorithm and communication unit (S&T) need to be modified accordingly.

Method used

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  • Energy internet network and energy internet method for direct-current power systems
  • Energy internet network and energy internet method for direct-current power systems
  • Energy internet network and energy internet method for direct-current power systems

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Embodiment Construction

[0023] specific implementation plan

[0024] The present invention will be further described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0025] Based on the "Energy Local Area Network" architecture, the present invention proposes a simple, modular, high stability margin and autonomous multiple power system energy interconnection network and energy interconnection method: BDDC (BidirectionalDC-DCConverters, bidirectional DC -DC converter) to achieve energy distribution, by using SBEA (SharingBusErrorAmplifier), common bus error amplifier) ​​to replace the software and communication unit in the traditional energy distribution method, at the same time, the traditional three-domain regulation method will be replaced by four-domain instead of the control method.

[0026] The structural block diagram of the energy interconnection network is as attached figure 2 shown. The main features are as follows: (1) Simple: no communication...

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Abstract

The invention provides an energy internet network and an energy distribution method for a plurality of direct-current power systems, and the method is simple, modularized, high in stability margin and independent. The distribution of energy is realized through current mode controlled bidirectional DC-DC converters, software and communication units in a traditional energy distribution method are replaced by using a sharing bus error amplifier (SBEA), and meanwhile, a traditional three-domain adjustment manner is replaced by a four-domain control manner. Communication equipment or a software algorithm is not needed in energy distribution, and only three conducting wires need to be connected; a plurality of systems using the same control manner participate the energy internet network through a unique analog control signal; more importantly, the energy distribution is automatically carried out, and the software algorithm is not needed; and the analog control is used, so that high stability margin, low output impedance and quick dynamic response of sharing bus are guaranteed.

Description

technical field [0001] The invention belongs to the technical field of energy utilization, and in particular relates to an energy interconnection network and an interconnection method of multiple DC power supply systems. Background technique [0002] When multiple solar array-battery DC power systems need to form an "energy local area network" to work, often because different solar array-battery DC power systems have different lighting and load conditions, some solar array-battery DC power systems are overpowered Sufficient and some power supplies are seriously insufficient, so one of the important issues is how to realize the energy distribution or power sharing of each independent power supply system. In order to achieve the purpose of expanding the power upper limit of a single power supply and distribution system, an "energy local area network" composed of multiple solar cell arrays-battery DC power systems (PV-Battery Power System, PBPS) has been formed. In the applica...

Claims

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Application Information

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IPC IPC(8): H02J1/12H02J1/14
CPCH02J1/12H02J1/14
Inventor 朱洪雨张博温张东来
Owner SHENZHEN AEROSPACE NEW POWER TECH
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