Energy management method and system for subway power supply network
An energy management system and power supply network technology, which is applied in the energy management field of the subway power supply system, can solve problems such as the sudden rise and fall of the power supply network voltage, and achieve the effect of extending the use authorization and saving energy
Active Publication Date: 2019-09-06
SHENZHEN SINEXCEL ELECTRIC
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Problems solved by technology
[0004] The technical problem to be solved by the embodiments of the present invention is to provide an energy management method and system for the subway power supply network, which overcomes the defect that the voltage of the power supply network tends to rise and fall rapidly in the prior art
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no. 1 example
[0045] See figure 1 , is the flow chart of the first embodiment of the energy management method for the subway power supply network provided by the present invention, the method includes:
[0046] Step S101. Collect system state information, where the system state information includes a power supply network voltage.
[0047] Step S102, judging whether the voltage of the power supply network is lower than the charging threshold voltage.
[0048] If the judgment result of step S102 is yes, then step S103 is executed. Step S103, enter the charging state, and use the energy in the subway power supply network to charge the energy storage device. Then return to step S101.
[0049] If the determination result of step S102 is no, then step S104 is executed. Step S104, judging whether the voltage of the power supply network is greater than the discharge threshold voltage.
[0050] If the judgment result of step S104 is yes, then step S105 is executed. Step S105, enter the dischar...
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The embodiment of the invention discloses an energy management method and system for a subway power supply network. The power supply network is in parallel connection with an energy storage device. The method includes the steps of acquiring system state information including voltage of the power supply network, entering into a charging state when the voltage of the power supply network is lower than charging threshold voltage, charging the energy storage device by using the energy in the subway power supply network, entering into a discharging state when the power supply network voltage is higher than charging threshold voltage, and releasing the energy in the energy storage device to the subway power supply network. The energy storage device is controlled to manage the energy in the power supply network according to the system state. When energy in the power supply network is surplus, the energy in the power supply is absorbed, and the energy in the power supply network is scarce, energy is output to the power supply network. The voltage of the power supply network remains stable, service life of equipment is prolonged, and energy can be saved.
Description
technical field [0001] The invention relates to the field of rail transit, in particular to an energy management method and system for a subway power supply system. Background technique [0002] Urban rail transit is an important part of the urban public transportation system, which has the advantages of large capacity, safety, convenience and speed, and the common ones are subways and light rails. Among them, the subway is a typical representative of urban rail transit and has broad application prospects. The subway generally uses the motor as the power source for traction. The motor needs a huge supply current at the moment of starting, causing the voltage of the power supply network to drop; The power supply network, causing the voltage of the power supply network to rise sharply. The sudden rise and fall of the power supply network voltage will pose a great threat to the equipment and the power supply network, so certain measures need to be taken to stabilize the volta...
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IPC IPC(8): H02J3/28H02J3/12
Inventor 林凤翔冼成瑜魏晓亮
Owner SHENZHEN SINEXCEL ELECTRIC