Northwest Power Grid Zhang Zhenyu; Adding new energy consumption space through inter-provincial energy trading

As an important position for the absorption of new energy in China, Northwest Power Grid has achieved remarkable results in the field of new energy consumption through a series of fruitful work in recent years. Not long ago, Huaneng Shaanxi Qinling Power Generation Co., Ltd. under the jurisdiction of Northwest Power Grid also achieved new breakthroughs in thermal power deep-tuning technology and set a new record. In this regard, the reporter interviewed Zhang Zhenyu, director of the Northwest Power Regulatory Sub-center of the State Grid.

Northwest Power Grid Zhang Zhenyu; Adding new energy consumption space through inter-provincial energy trading

Consumption: the method is always more difficult than

Reporter: What difficulties does the Northwest Power Grid face in meeting new energy consumption?

Zhang Zhenyu: In a nutshell, the “big development” of new energy in the northwest is accompanied by “high resistance”, and the reasons for the obstruction are constantly changing and intertwined. It is mainly reflected in the difficulty in matching the new energy consumption space and the new energy transmission channel capacity. Insufficient, insufficient peaking capacity of the power grid, no regularity in new energy generation, etc. These difficulties are the "roadblocks" that we must subdue, otherwise the consumption is on paper.

Reporter: What work has been done to absorb the new energy grid in the Northwest Power Grid?

Zhang Zhenyu: In a nutshell, we deeply explore the consumption space in the network. By increasing the substitution of new energy and self-sufficient power generation rights trading, the provinces share spares, reduce the mode of thermal power generation, carry out unit flexibility transformation, and start and stop the unit. Peaking and other means to increase the space for new energy consumption. Externally, we strengthened communication, opened the market outside the district, organized provinces (regions) to participate in the cross-regional spot market of renewable energy, sent wealthy new energy, upgraded trading mechanisms, innovated trading varieties, and increased new energy through cross-provincial energy trading. Dissipate space.

In view of the weak structure of the grid structure of the Northwest Power Grid, we accelerated the work of the third channel of the network interconnection between Xinjiang and the northwest main network, sorting out the new energy consumption section, improving the cross-region DC transmission capacity, and improving the exchange capacity of major inter-provincial sections. The ability to transport the blocked surface.

At the same time, in order to ensure the safety of the power grid, we have built a new energy cutting machine interconnection control platform for the Northwest Power Grid and a high-frequency cutting machine system covering the new energy of the Northwest Power Grid.

Thermal power: a "safety mat" to ensure the consumption of new energy

Reporter: How does the thermal power peak shifting role in the new energy consumption work?

Zhang Zhenyu: In a power grid with high energy consumption and new energy operation, the deep peak shaving capacity of thermal power plants is indispensable for the safe operation of the power grid. When we arrange the grid operation mode, we first conduct new energy forecasting through accurate big data analysis, and then adjust the startup mode of thermal power and arrange thermal power peaking according to the forecast. Of course, this prediction is only an aid and cannot be used as a standard. For example, predicting that today's new energy will have an output of 30 million kilowatts, and tomorrow's estimate is 2 million kilowatts of output. As a grid dispatcher, 30 million kilowatts of thermal power cannot be stopped today, and 30 million kilowatts will be put in tomorrow. The thermal power is turned on. On the one hand, the cost of starting and stopping the thermal power is very high. On the other hand, once the new energy load is predicted to be inaccurate, there is actually no 30 million kilowatts. Without the thermal power to support the bottom, the safety of the power grid cannot be guaranteed. Therefore, when the new energy output is large, the thermal power units on the Internet must carry out deep peak shaving.

In short, the deep peaking of thermal power plays a role of “safety pad” for the operation of the power grid. It is necessary for him to adjust and support it at the critical time. This is not only a guarantee to ensure the safety of the power grid. It is also an objective need for high-yield new energy grid operation.

Development: Improve the level of intelligent scheduling

Reporter: What kind of planning does the Northwest Power Grid have for the development of new energy?

Zhang Zhenyu: Combining the experience of new energy consumption in Northwest Power Grid in 2017, we have some ideas from planning, dispatching transactions, market mechanisms, and technological innovations. We must set a goal for everything, so first we strengthen our target management and strengthen process control, including new energy abandonment control targets, clean alternative targets, inter-provincial trading targets, etc., followed by fine-tuning, such as scientific co-ordination. Power grid maintenance plan management, improve power supply side adjustment capability, increase cross-regional peak-sharing mutual aid, optimize expansion of renewable energy spot transactions, etc. In addition, from expanding the scale of the northwest power transmission market, developing new energy alternatives to thermal power generation rights trading, We will promote cross-regional and inter-provincial transmission price policies to promote new energy consumption, and strengthen market mechanisms for all aspects of inter-provincial energy trading operation management.

In addition, this year we will also implement the construction of the northwest inter-provincial peaking auxiliary service market. The construction of this market is urgent, and it is determined by the current characteristics of the Northwest Power Grid. On the one hand, it is necessary to improve the level of new energy consumption, and on the other hand, it is to improve the inter-provincial The need to optimize the allocation of resources, on the other hand, is also the need to implement the state's efforts to promote the construction of the electricity market.

Another important task is to improve the level of intelligent dispatching. This is a hard bone and an important magic weapon to improve the control ability of the large power grid. At present, there are already existing new energy AVC construction work, clean energy intelligent consumption platform construction and integrated safety control. Platform construction, the construction of the first phase of the Northwest Power Grid System Protection, and the virtual power plant intelligent control system to be promoted.

Every advancement made by Northwest New Energy Consumption Center is struggling. In the future, we will continue to run on this road of struggle. Our goal is to promote the upgrading of the operation capacity of the Northwest Power Grid, the upgrading of clean energy consumption capacity, and the power grid. Coordinate the development level and upgrade to create a strong and intelligent large power grid.

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