Power supply circuit black start system based on hydrogen energy and control method thereof

Abstract

The invention discloses a power supply circuit black start system based on hydrogen energy and a control method thereof. The system comprises a distributed power supply, a hydrogen production device, a hydrogen energy battery energy storage device, a direct current bus M, a direct current controller, an inverter, a hydrogen electricity control device and a transformer which are connected in sequence, the distributed power supply transmits surplus power to the hydrogen production device; the hydrogen production device transports compressed hydrogen to the hydrogen energy battery for energy storage; the hydrogen energy battery stores energy and is used for providing electric power needed by black start, when the power grid is fully stopped, the electric power is transmitted to the bus A on the power grid side through a boost transformer of distributed energy, a transformer substation or an important load is started, and the power supply reliability and the black start flexibility are improved. In addition, redundant hydrogen can be transported to a hydrogen refueling station, and a hydrogen energy battery is used for storing energy to supply power to a tail end power supply of the single radiation line F1, so that the comprehensive utilization capability of energy is enhanced, and the economic benefit is improved.

Description

technical field [0001] The invention belongs to the technical field of restoring power supply and improving power grid structure, and particularly relates to a hydrogen energy-based power supply circuit black start system and a control method thereof. Background technique [0002] 1. There is a problem with the black start power supply [0003] Black start means that after the power grid is completely black due to an accident, when it is impossible to rely on other power grids to restore power supply, by starting the units with self-starting capability within the power grid, driving the units without self-starting capability, and then gradually expanding the scope of power recovery , and eventually the black grid will be restored to power supply. With the development of social economy and the continuous improvement of people's living standards, the requirements for safe and stable power supply are getting higher and higher. A high-reliability black-start system solution is...

AI Technical Summary

Problems solved by technology

Black start needs to rely on self-starting thermal power or hydropower black start units, but because the city center often lacks power supply, black start power supply is insufficient or the output is limited, so the grid power supply cannot be effectively restored, and the power supply reliability is low

[0007] (2) The traditional black start relies on multiple diesel generators, which consumes a lot of energy and pollutes a lot

[0008] (3) There are many recovery paths for the activated units and users, and the time is long

Due to the large scale of the power grid, multiple levels of transformation, and limited by environmental protection pressure, the power supply is often far away from the load center, resulting in the start-up recovery path needing to go through layers of substations, and the recovery paths of the activated units and users are many, and it takes a long time to recover quickly. grid power supply

[0009] (4) When the closing no-load line or transmission line is too long, the unit self-excitation and line overvoltage problems will be caused due to the capacitive effect

[0010] (5) Due to the extremely low probability of power outages in the entire network, starting power sources used as black starting power sources, such as diesel generators or traditional batteries, are often in an idle state, and resources are not fully utilized

[0011] (6) In addition, there is a lot of power waste in distributed power generation, the excess power cannot be sent out, and power abandonment is common

[0012] 2. There is a problem with the security power supply of important users

[0014] 3. There is a problem with the single radiation line

[0017] 4. There are problems with charging piles

Therefore, the DC charging pile needs to have a built-in rectification device. The rectification device increases the volume of the charging pile and increases the occupation of space; it also increases the investment.

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