Distributed-power-supply connection measurement and control and protection all-in-one machine and method
A distributed power supply, measurement, control and protection technology, applied in the direction of single-network parallel feeding arrangement, etc., can solve the problems of high engineering cost, complicated control process, low degree of automation, etc., to improve safety and stability, and increase revenue efficiency and reduce maintenance costs
Inactive Publication Date: 2014-07-30
INNER MONGOLIA POWER GRP
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Problems solved by technology
[0005] In the existing technology, in order to realize islanding detection, anti-backflow control and power quality control, three independent professional control devices are required, which makes the automation degree of the whole control system relatively low, the control process is complicated, and the failure rate is high. The maintenance cost is also high; in addition, due to the large variety of equipment, the engineering cost of the system remains high
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[0030] In order to have a further understanding of the purpose, structure, features, and functions of the present invention, the following detailed descriptions are provided in conjunction with the embodiments.
[0031] An embodiment of the present invention provides a distributed power access measurement control protection integrated machine, such as figure 1 As shown, the all-in-one machine includes a central controller 101 . The central controller 101 is used to control the power generation of the distributed power supply by using the anti-backflow control algorithm according to the energy parameters of the grid-connected point, so as to prevent the excess power of the distributed power supply from being sent back to the grid. In addition, the central controller is also used to detect the occurrence of islanding according to the voltage and frequency parameters of the grid-connected point, and disconnect the distributed power supply from the grid within a specified time aft...
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The invention provides a distributed-power-supply connection, measurement and control and protection all-in-one machine and method. The all-in-one machine includes a central controller which is used for controlling power generation quantity of a distributed power supply through use an anti-reflux control algorithm according to an energy parameter of a grid connection point so as to prevent redundant electricity of the distributed power supply from being returned to a power grid, also used for detecting happening of island according to the voltage and frequency parameters of the grid connection point and splitting the distributed power supply and the power grid in a regulated time after happening of the island, and also used for comparing electric energy quality data of a monitored grid connection point and a preset electric energy quality standard and controlling an electric energy quality unit to regulate an electric energy quality according to the comparison result so as to comply with the preset electric energy quality standard. The distributed-power-supply connection, measurement and control and protection all-in-one machine and method integrate and optimize island detection, anti-reflux control and electric energy quality control so as to form a control strategy of the all-in-one machine so that the control intelligent degree is improved and the construction cost of a system is reduced.
Description
technical field [0001] The invention relates to the technical field of distributed power generation, in particular to a distributed power access measurement, control and protection integrated machine and a distributed power access measurement, control and protection method. Background technique [0002] At present, with the access of large-scale distributed power to the grid, the stability and security of the grid are greatly affected. This is because various factors such as the intermittency and volatility of distributed power output and the quality of power generated by power electronic products have an impact on the power grid, especially when distributed power generation accounts for a high proportion of the entire power grid, that is, distributed power When the penetration rate is high, the security and stability of the power grid are more affected. The impact surface involves voltage, frequency, power angle, and power grid dispatching. [0003] In addition, due to th...
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IPC IPC(8): H02J3/38
Inventor 刘海涛邓昆玲云峰
Owner INNER MONGOLIA POWER GRP