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Grid black start method based on photovoltaic storage power generation system

A technology of photovoltaic storage power generation and black start, which is applied in the direction of photovoltaic power generation, electrical components, circuit devices, etc., can solve the problem that large-scale power outages are inevitable, and achieve the effect of stable voltage amplitude and frequency

Active Publication Date: 2018-10-12
STATE GRID JIANGSU ELECTRIC POWER CO ELECTRIC POWER RES INST +2
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Problems solved by technology

[0002] In recent years, with the introduction and construction of the concept of "Strong Smart Grid", the power system has made great progress in terms of reliability and flexibility, but large-scale power outages caused by severe weather, natural disasters, equipment failures, etc. still inevitable

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  • Grid black start method based on photovoltaic storage power generation system
  • Grid black start method based on photovoltaic storage power generation system
  • Grid black start method based on photovoltaic storage power generation system

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Embodiment Construction

[0064] The present invention will be further described below in conjunction with the accompanying drawings.

[0065] Such as figure 1 As shown, the grid black start method based on the photovoltaic storage power generation system of the present invention includes the following steps,

[0066] Step (A), based on the improved MTTP strategy of the photovoltaic array unidirectional Boost converter control strategy, and the disturbance observation of the unidirectional Boost PWM converter modulation signal, so that the photovoltaic array can quickly track the load power change, and the photovoltaic array power output Gradually approaching the load demand power, that is, making the two close to the same, the photovoltaic array unidirectional Boost converter control strategy based on the improved MTTP strategy is as follows,

[0067] (A1) When the maximum output power of the photovoltaic array is less than the required power of the load, the photovoltaic power generation adopts MPPT...

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Abstract

The invention discloses a power grid black start method based on an optical storage power generation system. The method comprises steps: A) perturbation observation is carried out one-way Boost PWM converter modulation signals, a photovoltaic array quickly tracks load power changes, and the power output of the photovoltaic array gradually tends to the load demand power; B) an energy storage part is controlled, and stability of DC bus voltage is maintained through controlling PWM modulation signals of a thyristor; C) according to a constant-voltage and constant-frequency V / f control strategy and improved dual-loop control under a d and q rotating coordinate system, fast adjustment and real-time tracking on the voltage amplitude and the frequency are realized; and D) through a one-time closing method, after a long distance no-load transmission line is charged, a station asynchronous motor is then started and black start of the power grid is realized. The optical storage power generation system is used for gradually restoring the power grid after power failure, the stability of the amplitude and the frequency of the power grid voltage during the black start process is ensured, and the application prospect is good.

Description

technical field [0001] The invention relates to the technical field of electric power system restoration, in particular to a black start method for a power grid based on an optical storage power generation system. Background technique [0002] In recent years, with the introduction and construction of the concept of "Strong Smart Grid", the power system has made great progress in terms of reliability and flexibility, but large-scale power outages caused by severe weather, natural disasters, equipment failures, etc. Still inevitable. In recent years, many large-scale power outages have occurred successively around the world (such as the blackout in the United States and Canada in August 2003, the blackout in Hainan Province in September 2005, the blackout in Western Europe in November 2006, the blackout in 2012 The Indian power outage in July, etc.), caused huge economic losses and social impact. With the continuous increase of the scale of the power grid, the restoration o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/38
CPCH02J3/383H02J3/385Y02E10/56
Inventor 刘建坤周前汪成根陈亮卫鹏徐珂解兵徐青山
Owner STATE GRID JIANGSU ELECTRIC POWER CO ELECTRIC POWER RES INST