On June 4, most areas of Jilin Province had 3 to 5 winds. At 8 o'clock, the dispatching value of the State-owned Jilin Electric Power Control Center was high. After the work, the wind power forecasting system was opened for the first time, and the wind power trend of the province was estimated.
Wind energy is clean energy, but the wind is invisible and difficult to control and control. How to make wind power benefit the safe and stable operation of Jilin Power Grid while benefiting the green mountains and green mountains of Jilin Province?
In the lobby of the State Grid Jilin Electric Power Control Center, it can be seen that the two provinces' wind power and photovoltaic day consumption curves on the right side of the large screen fluctuate from time to time. Sun Yong, deputy director of the Hydropower and New Energy Division of the State-owned Jilin Power Regulatory Center, said that wind energy resources are abundant but unevenly distributed. The power grids in the concentrated areas of wind power resources are weak, and the randomness, intermittent and anti-peak characteristics of wind power generation are given to Jilin. The peaking, frequency modulation, voltage regulation and power quality of the power grid have brought about a series of problems. To solve this series of problems, we need technical means to support them.
At 13:00 on the same day, the province's wind power generation, through the new energy real-time balance monitoring system, Gao Huihui found that the grid consumption space is insufficient, Jilin power grid peaking difficulties, and the real-time capacity of wind power is expected to still be 1 million kilowatts, so he contacted in time The Northeast Electric Power Control Sub-center requested a contact line to support 1 million kilowatts to minimize wind power.
At the same time, the intelligent wind power control system will extract data such as grid power generation, load, and tie line delivery from the grid operation monitoring system, generate control commands in real time according to a predetermined algorithm program, and automatically control wind turbines and power grids of 43 wind farms in the province. The state ensures that clean electrical energy is charged into every corner of the grid's load space.
The wind power forecasting system, the new energy real-time balance monitoring system, the intelligent wind power control system, and the wind power energy saving dispatching plan system that has been supporting the back of the work are the wind power consumption technology developed by the State Grid Jilin Electric Power Co., Ltd. component. State Grid Jilin Power also proposed a scheduling plan that covers the content of wind power forecasting, and a wind power priority scheduling mode that optimizes the power distribution of wind farms, effectively reducing the frequent start and stop of conventional units caused by large fluctuations in wind power. Sun Yong pointed to the constant changes in the intelligent wind power control system. According to these technologies, the ability of Jilin Power Grid to operate safely and stably has been greatly improved, and the wind power consumption capacity has been increased by more than 10%.
At 15:00, Gao Zhonghui discovered through the monitoring interface of the intelligent wind power control system that a wind farm command tracking anomaly. He judged that the cause of the fault was abnormality in the communication channel between the wind farm and the State Grid Jilin Electric Power Control Center, and immediately notified the wind farm duty personnel to deal with the channel anomaly problem. It ensures the smooth operation of the power grid.
The safe and stable operation of the power grid requires the cooperation of every “network†node. State Grid Jilin Power has strengthened the “two-way friendly connection between the source and the network†of the power grid and the wind farm, so that the nodes can be unblocked.
The source wind power priority dispatching mechanism includes the friendlyness of the wind farm to the grid and the friendliness of the grid to the wind farm. This kind of friendliness is reflected in the grid actively promoting wind power consumption and the wind farm actively participating in the safe and stable operation of the grid.
State Grid Jilin Power helped 43 wind farms to build a multi-dimensional security defense system covering large-scale wind power bases with “failure warning, fault isolation, self-response, stability control and optimal control†to play the driving force of wind farms and improve the safe operation level of wind power bases. Through the wind farm management technology, under the premise of ensuring the safety of the wind farm itself, tracking and adjusting the response command of the national grid Jilin Electric Power, and improving the controllability of the wind farm, the wind farm has similar control characteristics to the conventional power plant.
At 16:00, Gao Huihui ended his day's work. During the handover, he explained to his colleagues the power generation and restrictions of the current province's wind power, as well as the ongoing wind power spot transaction, preparing for the peaking of the power grid during the night low valley. .
Fu Jiyue, director of the dispatching department of the State Grid Jilin Electric Power Control Center, said that Jilin Province is in the low-voltage phase at night, and it is more difficult to adjust the peak depth. This requires the dispatcher to reduce the clean energy consumption space while reducing the space according to the actual situation. The impact of wind power fluctuations on the grid.
"In summer, thermal power can make way for wind power, but winter is the most prominent season for Jilin Power Grid security and wind power consumption." Fu Jiyue said that the remarkable feature of Jilin Power Supply Structure is that the thermal power unit accounts for a large proportion. There are many heating units and the heating period is long in winter. After scientific and technological research, the State Grid Jilin Electric Power has built a thermal-electric power joint optimization dispatching system and demonstrated its application. Under the premise of ensuring the heating unit and heating quality, the thermal power output is further diverted to create conditions for the acceptance of wind power. During the heating period from 2017 to 2018, the amount of abandoned wind power was reduced by 83.98 million kWh, a year-on-year decrease of 12.65%. At present, State Grid Jilin Electric Power is undertaking the research of the national key R&D plan “Conventional/heating unit adjustment capability improvement and electric heating comprehensive coordination scheduling technologyâ€. This research result will further improve the level of efficient utilization of winter wind power in Jilin Province and ensure the large power grid. Safe and smooth operation in winter. (State Grid Jilin Electric Power Co., Ltd., State Grid News)
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