A distributed power grid connection controller and control method

A distributed power supply and control method technology, which is applied in the direction of AC network voltage adjustment, single-network parallel feeding arrangement, and AC network to reduce harmonics/ripples, etc., to achieve fast and flexible scheduling, improve safety and flexibility, and simplify The effect of the control process

Inactive Publication Date: 2015-09-09
辽宁立德电力电子股份有限公司
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Problems solved by technology

[0009] The purpose of the present invention is to overcome the adverse effects of distributed power access on the distribution network, and provide a distributed power network controller and control method, which can compensate the reactive power required by the power grid, and can perform three-phase separation Compensation, so that the reactive power of the system is in a balanced state, ensuring the stable operation of various parts of the power grid; and the device can also suppress power quality problems such as voltage fluctuations, flicker, and harmonic pollution

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  • A distributed power grid connection controller and control method
  • A distributed power grid connection controller and control method
  • A distributed power grid connection controller and control method

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[0035] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0036] refer to figure 1 , a distributed power access grid control device, the device includes a grid public access point voltage detection unit 1, three-phase transformers T1, T2, T3, connecting reactors L1, L2, L3, series converter 2, bus Capacitors C1 and C2, a bus voltage detection unit 7, a parallel converter 3, a distributed power supply voltage and current detection unit 4, a touch screen display unit 5, and a system controller. The series converter 2 and the parallel converter 3 are connected to the bus capacitors C1 and C2 through the composite busbar, and the output terminals of the series converter 2 are connected to the connection reactors L1, L2 and L3 and then connected to the three-phase transformers T1, T2 and T3 connected. The system controller unit adopts DSP signal processor.

[0037] Among them...

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Abstract

The invention discloses a device and method for controlling a distributed power supply to be connected to a power grid. The device comprises a power-grid public access point voltage detection unit, a three-phase transformer, connecting electric reactors, a series converter, a bus capacitor, a bus voltage detection unit, a parallel converter, a distributed power supply voltage and current detection unit, a touch screen display unit and a system controller. The series converter and the parallel converter are connected with the bus capacitor through a composite bus bar, and the output end of the series converter is connected with the connecting electric reactors and is then connected with the three-phase transformer. A DSP serves as a system controller unit. By means of the device and method for controlling the distributed power supply to be connected to the power grid, electric-energy quality of the distributed power supply can be improved, and safety and economic operation level of a power system can be improved.

Description

technical field [0001] The invention belongs to the technical field of electric power, and relates to a control device and method for connecting a distributed power source to a power grid. Background technique [0002] Due to the relative shortage of conventional energy supply in my country and the increasing requirements for environmental protection, the development and utilization of renewable energy has received extensive attention. In order to develop a "low-carbon economy", my country has put forward the binding targets of "energy saving and emission reduction", and the corresponding distributed generation (distributed generation, DG) technology has been highly valued by the country and has developed rapidly. Distributed generation (DG) refers to: in order to meet the needs of specific users or support the economic operation of the existing distribution network, it is arranged in a decentralized manner near the user, and the power generation ranges from thousands of wat...

Claims

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Application Information

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IPC IPC(8): H02J3/38H02J3/18H02J3/01H02J3/12
CPCY02E40/30Y02E40/40
Inventor 张玉良张三勇关微郭洪月赵波张津铭柳杨陈明非董冯羽徐维东李檀乔雷赵娇
Owner 辽宁立德电力电子股份有限公司
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