Valve control over-voltage-over-current cooperative protection method and system for flexible direct current converter valve
A flexible DC and overvoltage protection technology, which is used in protection against overvoltage, emergency protection devices with automatic disconnection, emergency protection circuit devices, etc. It can solve fault ride-through failure, increased investment, and does not involve flexible DC It solves the problems of valve-controlled overpressure-overcurrent synergistic protection method, etc., to achieve the effect of improving fault ride-through capability, reducing capacitance value, and enhancing system reliability.
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Embodiment 1
[0048] Embodiment 1: The valve-controlled overvoltage-overcurrent coordinated protection method for a flexible DC converter valve provided in this embodiment includes the following steps:
[0049] S1, such as figure 1 As shown, for the IGBT device used in the flexible DC converter valve, the turn-off peak voltage test under different turn-off currents was carried out, and the maximum capacitor voltage when the turn-off peak voltage did not exceed the rated voltage of the device when different currents were turned off was recorded, and plotted. The neutron module of the flexible DC converter valve unlocks the operating voltage-current operating capability curve, and the specific process includes:
[0050] S11. Build a double-pulse test platform based on the adopted IGBT device, set the initial value of the test current to 0pu, adjust the test current to the initial value, and set the current step size to carry out the double-pulse test. Preferably, the step size can be selected...
Embodiment 2
[0066] Embodiment 2: The above Embodiment 1 provides a valve-controlled overpressure-overcurrent cooperative protection method for a flexible DC converter valve. Correspondingly, this embodiment provides a valve-controlled overpressure-overcurrent protection method for a flexible DC converter valve. Overcurrent cooperative protection system. The system provided in this embodiment may implement the valve-controlled overvoltage-overcurrent cooperative protection method of the flexible DC converter valve of the first embodiment, and the system may be implemented by software, hardware, or a combination of software and hardware. For the convenience of description, when describing this embodiment, the functions are divided into various units and described respectively. Of course, during implementation, the functions of each unit may be implemented in one or more software and / or hardware. For example, the system may include integrated or separate functional modules or functional uni...
Embodiment 3
[0090] Embodiment 3: This embodiment provides an electronic device corresponding to the valve-controlled overvoltage-overcurrent cooperative protection method of the flexible DC converter valve provided in the first embodiment. The electronic device may be an electronic device used for a client. For example, a mobile phone, a notebook computer, a tablet computer, a desktop computer, etc., are used to execute the method of the first embodiment.
[0091] like Figure 5 As shown, the electronic device includes a processor, a memory, a communication interface and a bus, and the processor, the memory and the communication interface are connected through the bus to complete mutual communication. The bus can be an Industry Standard Architecture (ISA, IndustryStandard Architecture) bus, a Peripheral Device Interconnect (PCI, Peripheral Component) bus or an Extended Industry Standard Architecture (EISA, Extended Industry Standard Component) bus and the like. A computer program that ca...
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