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Parallel isolation overlapping compensation type controller and method thereof

An output control and load control technology, which is applied in current collectors, photovoltaic power generation, electric vehicles, etc., can solve the problems of large internal resistance, high relative loss, and difficulty in meeting control indicators.

Inactive Publication Date: 2004-01-07
夏秀英 +1
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0004] The series isolation control method has three defects: ①. The isolation device is connected in series to the main load power supply channel and has an approximately constant voltage drop characteristic, which will cause additional energy loss and heat generation
The closer the system rated voltage is to the constant voltage drop of the isolation device, the higher the relative loss
②. The degree of isolation is low, and the main and auxiliary channels are difficult to meet the requirements of higher control indicators and more complex control items.
③. Controlling the output of the main load simply by shunting is only suitable for small power station systems with large equivalent internal resistance of the input power supply and obvious constant current characteristics

Method used

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  • Parallel isolation overlapping compensation type controller and method thereof
  • Parallel isolation overlapping compensation type controller and method thereof
  • Parallel isolation overlapping compensation type controller and method thereof

Examples

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Embodiment Construction

[0020] Specific examples see Figure 7 . It is the electrical schematic diagram of the complete common negative circuit of the whole system.

[0021] Frame A is a 3-phase input common-negative parallel isolated rectification circuit, D1-D3 provides rectified DC power for the main load, D4-D6 provides rectified DC power for the auxiliary load, and D7-D9 is a shared rectifier device.

[0022] Box B is the common negative main load and control switch circuit, ZZ is the main load with the highest priority in the system (usually a battery pack), and ZQ is the main load control switching transistor. ZK is the control terminal of the main load switch. When the ground-to-ground signal appears at the ZK terminal, ZQ is closed, and ZZ obtains electric energy. ZC is the main load state measurement terminal. In this schematic diagram, the measurement input terminal ZC is simply for voltage measurement, but for complex systems, it actually includes the measurement of other physical quant...

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Abstract

This invention discloses a power input / output control device and control method mainly used in off-net wind force, photovoltaic solar power station input control and voltage control, current limitation to various loads, composed of a rectifier, divider D(D1-DN), oad control switch k(ZK, FK1-FKN) and system controller. First, D divides the input energy to primary and secondary parts with parallel separation method, then system controller U operates load control switch k to control distribution of energy output. This device distributes the input power energy properly among multiload in the way of overlap complement.

Description

1. Technical field [0001] The invention relates to an electronic circuit, in particular to a power input / output control device. The power supply input / output controller and method are used for input control of off-grid wind power and photovoltaic solar power stations, and functions such as voltage control and current limitation for various loads. 2. Technical background [0002] Off-grid solar power plants generally use battery packs to store electrical energy. If the electric energy generated by the power station is not used or stored in time, it will not only cause waste, but also may affect the stable and reliable operation of the system. The electric energy output by the power station should first be supplied to the main load or stored (the main load refers to the main target load and energy storage battery determined during system design). When the electric energy generated by the power station is too much for the main load to use up, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00H02J7/35
CPCY02E10/566Y02E10/56
Inventor 夏秀英
Owner 夏秀英
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