Novel grid-connection control system for small gas generator set

A technology for control systems and power grids, which is applied to electrical components, single-network parallel feeding arrangements, emergency protection circuit devices, etc., to improve detection accuracy and control reliability, solve complex problems, and reduce costs.

Inactive Publication Date: 2014-02-19
蒙国宁
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  • Abstract
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  • Claims
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Problems solved by technology

[0005] Compared with the existing technology, this system does not directly measure the electric frequency of the grid-connected point to realize over-frequency and under-frequency control and protection, but realizes the over-frequency, under-frequency and anti-islanding automatic protection functions through indirect measurement of the generator speed. Complex problems, not only reduces costs, but also improves detection accuracy and control reliability

Method used

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  • Novel grid-connection control system for small gas generator set
  • Novel grid-connection control system for small gas generator set
  • Novel grid-connection control system for small gas generator set

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Embodiment Construction

[0009] See the attached picture, this system is composed of: grid-connected decoupling executive device, grid-connected quasi-synchronous voltage detection and control device, grid-connected point frequency detection and control device, grid-connected point voltage and current detection and control device, and anti-islanding automatic protection device; grid-connected decoupling The execution device is composed of: grid-connected contactor 3, de-loading relay 5, operation contactor 6, starting contactor 8, and starting trigger switch 10; grid-connected contactor 3 is an AC contactor, and one end of grid-connected contactor 3 is connected to the grid The other end is connected to the generator; there is a grid-connected self-locking switch 2 on the grid-connected contactor; one end of the electromagnetic coil of the grid-connected contactor 3 is connected to a phase circuit of the grid, and the other end is connected to the grid-connected quasi-synchronous voltage detection contr...

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Abstract

The invention discloses a distributed power supply grid-connection control system of a novel grid-connection control system for a small gas generator set. The distributed power supply grid-connection control system has the functions of automatic grid connection, automatic protection and islanding prevention and is simple in structure, accurate in control, reliable and durable.

Description

technical field [0001] A distributed power grid-connected control system is mainly suitable for distributed power sources powered by small gas engines. Background technique [0002] China's distributed power grid access technology regulations, 5KW ~ 200KW distributed power grid access technical standards are exactly the same, the functional structure of the grid-connected system is naturally the same, in the case of the same functional structure, large and small electrical equipment is different from large and small machinery Equipment has a large cost difference; for example, internal combustion engines with the same structure, same function, same quality, and different power (5kw~200kw), their cost can vary many times, while the same structure, same function, same quality, different power (5kw~200kw) grid-connected cabinets, the maximum difference in their cost will not exceed double; therefore, compared with high-power (200kw) distributed power, the cost of low-power (20k...

Claims

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Application Information

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IPC IPC(8): H02J3/42H02H7/00
Inventor 蒙国宁
Owner 蒙国宁
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