CN203645344U

CN203645344U - Hybrid AC/DC microgrid control system

Info

Publication number: CN203645344U
Application number: CN201320788860.7U
Authority: CN
Inventors: 李卫红
Original assignee: Xian All Safe Science and Technology Co Ltd
Current assignee: Xian All Safe Science and Technology Co Ltd
Priority date: 2013-11-30
Filing date: 2013-11-30
Publication date: 2014-06-11
Anticipated expiration: 2023-11-30

Abstract

The utility model discloses a hybrid AC/DC microgrid control system. The system comprises a main controller, a DC generating module, an AC generating module and a power distribution network. The DC generating module is connected to an AC bus via an interface one and an inverter one. The AC bus is connected to the power distribution network. The DC generating module is also connected to an energy storage device, which is connected to the AC bus via an interface two and an inverter two. The interface one and the interface two are connected to an AC load and a DC load via a DC bus. An inverter three is connected between the DC bus and the AC load, and a DC/DC converter is connected between the DC bus and the DC load. The AC generating module is connected to the AC bus via an interface three. The system can supply the AC load and the DC load with power output by the generating modules via the DC bus and the AC bus. Power supply is stable and reliable, and thus the system is easy for promotion and applications.

Description

A kind of alternating current-direct current mixing microgrid control system

Technical field

The utility model relates to microgrid electric power supply control system technical field, especially relates to a kind of alternating current-direct current mixing microgrid control system.

Background technology

The appearance of distributed power generation is fine to have solved non-renewable energy resources and has day by day reduced and the drawback of large-scale power grid centrally connected power supply, although distributed power source has many good qualities, but in the time of fault, distributed power source must excise at once from network, and this has just limited the usefulness performance of distributed power source greatly, and distributed power source composition has been coordinated in the appearance of microgrid well, can be incorporated into the power networks with large electrical network, in the time that large electrical network breaks down, piconet island operation, independent is load power supply; When network configuration changes or breaks down in microgrid, how to coordinate relation between each micro-power supply, so that ensure under any circumstance can be to load quality supply, this difficult point is exactly the control technology key technology place of microgrid; Being incorporated into the power networks of microgrid, affect to a certain extent major network quality, produce such as voltage fluctuation, dodged limit etc., computer, this class sensitive equipment of microprocessor are harsher to the requirement of the quality of power supply, even falling all, the voltage in several cycles will affect the normal work of this kind equipment, cause huge economic loss to society, therefore, the control to the quality of power supply and improvement just seem particularly important.

Utility model content

Technical problem to be solved in the utility model is for above-mentioned deficiency of the prior art, a kind of alternating current-direct current mixing microgrid control system is provided, and it is simple in structure, reasonable in design, it is convenient to realize, use simple operation, electricity generation module can be exported to electric energy is AC load and DC load power supply by DC bus and ac bus, powers reliable and stable, long service life, practical, result of use is good, is convenient to promote the use of.

For solving the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of alternating current-direct current mixing microgrid control system, it is characterized in that: comprise master controller, utilize the DC generation module of solar energy or fuel power generation function, the alternative electric generation module and the power distribution network that utilize wind energy to generate electricity, described DC generation module is joined with ac bus by interface one with for the inverter one that direct current is converted to alternating current, described ac bus and power distribution network join, described DC generation module is also joined with energy storage device, described energy storage device joins with ac bus by interface two and inverter two, described interface one and interface two also join by DC bus and AC load and DC load, between described DC bus and AC load and DC load, be connected to respectively inverter three and the DC/DC transducer for direct voltage is changed, described alternative electric generation module is joined by interface three and ac bus, described master controller joins for the monitoring host computer of tele-control system with being arranged in Control Room, described master controller input is connected to ac bus and joins for detection of the voltage detection module of ac bus voltage, described master controller output and interface one, interface two, interface three, dynamically adjust the voltage dynamic adjustments module of ac bus voltage and join for the alarm module that voltage is not reported to the police in normal range (NR).

Above-mentioned a kind of alternating current-direct current mixing microgrid control system, is characterized in that: described master controller is PLC controller.

The utility model compared with prior art has the following advantages:

1, the utility model is simple in structure, reasonable in design, and it is convenient to realize.

2, electricity generation module can be exported to electric energy be the power supply of AC load and DC load by DC bus and ac bus to the utility model, powers reliable and stable.

3, of the present utility model practical, result of use is good, is convenient to promote the use of.

In sum, the utility model is simple in structure, reasonable in design, it is convenient to realize, and uses simple operation, electricity generation module can be exported to electric energy is AC load and DC load power supply by DC bus and ac bus, power reliable and stable, long service life, practical, result of use is good, is convenient to promote the use of.

Below by drawings and Examples, the technical solution of the utility model is described in further detail.

Brief description of the drawings

Fig. 1 is theory diagram of the present utility model.

Description of reference numerals:

1-master controller; 2-DC generation module; 3-alternative electric generation module;

4-energy storage device; 5-voltage detection module; 6-voltage dynamic adjustments module;

7-power distribution network; 8-interface one; 9-interface two;

10-interface three; 11-inverter one; 12-inverter two;

13-inverter three; 14-DC/DC transducer; 15-AC load;

16-DC load; 17-monitoring host computer; 18-alarm module.

Embodiment

As shown in Figure 1, the utility model comprises master controller 1, utilize the DC generation module 2 of solar energy or fuel power generation function, the alternative electric generation module 3 and the power distribution network 7 that utilize wind energy to generate electricity, described DC generation module 2 is joined with ac bus by interface 1 with for the inverter 1 that direct current is converted to alternating current, described ac bus and power distribution network 7 join, described DC generation module 2 is also joined with energy storage device 4, described energy storage device 4 joins with ac bus by interface 29 and inverter 2 12, described interface 1 and interface 29 also join by DC bus and AC load 15 and DC load 16, between described DC bus and AC load 15 and DC load 16, be connected to respectively inverter 3 13 and the DC/DC transducer 14 for direct voltage is changed, described alternative electric generation module 3 is joined by interface 3 10 and ac bus, described master controller 1 joins for the monitoring host computer 17 of tele-control system with being arranged in Control Room, described master controller 1 input is connected to ac bus and joins for detection of the voltage detection module 5 of ac bus voltage, described master controller 1 output and interface 1, interface 29, interface 3 10, dynamically adjust the voltage dynamic adjustments module 6 of ac bus voltage and join for the alarm module 18 that voltage is not reported to the police in normal range (NR).

As shown in Figure 1, in the present embodiment, described master controller 1 is PLC controller.

Operation principle of the present utility model and the course of work are: DC generation module 2 stores an electric energy part for conversion to energy storage device 4, the electric energy that the electric energy of another part electric energy, energy storage device 4 and alternative electric generation module 3 are changed sends DC bus and ac bus to, sends electric energy to AC load 15 and DC load 16 by DC bus and ac bus; Whether the each electricity generation module of information control that master controller 1 transmits according to voltage detection module 5 is DC bus and ac bus power supply.

The above; it is only preferred embodiment of the present utility model; not the utility model is imposed any restrictions; every any simple modification of above embodiment being done according to the utility model technical spirit, change and equivalent structure change, and all still belong in the protection range of technical solutions of the utility model.

Claims

1. an alternating current-direct current mixing microgrid control system, it is characterized in that: comprise master controller (1), utilize the DC generation module (2) of solar energy or fuel power generation function, the alternative electric generation module (3) and the power distribution network (7) that utilize wind energy to generate electricity, described DC generation module (2) is joined with ac bus by interface one (8) with for the inverter one (11) that direct current is converted to alternating current, described ac bus and power distribution network (7) join, described DC generation module (2) is also joined with energy storage device (4), described energy storage device (4) joins with ac bus by interface two (9) and inverter two (12), described interface one (8) and interface two (9) also join by DC bus and AC load (15) and DC load (16), between described DC bus and AC load (15) and DC load (16), be connected to respectively inverter three (13) and the DC/DC transducer (14) for direct voltage is changed, described alternative electric generation module (3) is joined by interface three (10) and ac bus, described master controller (1) joins for the monitoring host computer (17) of tele-control system with being arranged in Control Room, described master controller (1) input is connected to ac bus and joins for detection of the voltage detection module (5) of ac bus voltage, described master controller (1) output and interface one (8), interface two (9), interface three (10), dynamically adjust the voltage dynamic adjustments module (6) of ac bus voltage and join for the alarm module (18) that voltage is not reported to the police in normal range (NR).

2. according to a kind of alternating current-direct current mixing microgrid control system claimed in claim 1, it is characterized in that: described master controller (1) is PLC controller.