Quick frequency response control method and device for new energy power generation unit

Abstract

The invention provides a quick frequency response control method and device for a new energy power generation unit. The active power of the new energy power generation unit is determined through a boxtransformer measuring and control device; the determined active power distribution value is sent to a photovoltaic inverter or a draught fan converter through the box transformer measuring and control device; the photovoltaic inverter or the draught fan converter generates power according to the active power distribution value, and not only are the workload and cost reduced, but also the frequency response time of the new energy power generation unit in a new energy station is shortened; the active power of a photovoltaic power station can be quickly controlled, the response time is within five seconds, and a step of direct communication between a controller and the inverter is omitted; signals of voltage, current, power, frequency and the like, originally collected by the box transformermeasuring and control device, of a transformer can be utilized for direct quick frequency response control, hardware equipment does not need to be additionally arranged, quick communication control is ensured, and the cost can be effectively reduced.

Description

technical field [0001] The invention relates to the field of new energy technology, in particular to a fast frequency response control method and device for a new energy generating unit. Background technique [0002] In recent years, new energy has developed rapidly. With the high proportion of random and volatile new energy connected to the power grid, the pressure on frequency regulation and the risk of safe operation of the power grid are increasing. The specific performance is as follows: [0003] (1) Lead to an increase in the demand for power system reserve capacity. The premise of the stable operation of the power system is the real-time balance between power generation and power consumption, otherwise it will cause the power quality of the system to decline, or even become unstable. For this reason, it is often necessary to configure a certain reserve capacity in the power system to eliminate the instantaneous power imbalance. The random fluctuations of new energy ...

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Problems solved by technology

[0010] In order to overcome the above disadvantages of heavy workload, high cost and long response time in the prior art, the present invention provides a fast frequency response control method and device for a new energy power generation unit. The initial value of the active power of the new energy power generation unit determines the active power of the new energy power generation unit; the box transformer measurement and control device sends the active power distribution value determined based on the active power of the new energy power generation unit to the photovoltaic inverter or wind turbine converter The photovoltaic inverter or wind turbine converter generates power according to the distribution value of active power. This solution is realized by the box-type transformer measurement and control device, which reduces the direct communication link between the controller and the inverter. At the same time, the box-type transformer can also be used The signals already collected by the measurement and control device are directly used for fast frequency response control without additional hardware equipment, which not only reduces workload and cost while ensuring fast communication control, but also shortens the number of new energy power generation units in new energy stations. frequency response time

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