A Black Start Method Considering the Participation of HVDC Transmission System
A technology for high-voltage direct current and power transmission systems, which is applied in AC network circuits, circuit devices, power transmission AC networks, etc., can solve the problems of lack of qualitative and quantitative evaluation of the impact of system recovery at the time of startup, so as to avoid system collapse and improve The effect of self-healing recovery ability and speeding up the black start process
Active Publication Date: 2021-04-27
POWER DISPATCHING CONTROL CENT OF GUANGDONG POWER GRID CO LTD +1
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Problems solved by technology
At present, there are some studies on the unlocking mode, start-up conditions and control methods of starting the HVDC transmission system in the black start phase, but the impact of the start-up time, start-up conditions and position in the grid on the system recovery is still unclear. Lack of qualitative and quantitative assessment methods
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Embodiment 1
[0075]In this embodiment, the grid A is taken as an example to illustrate the feasibility of the present invention. What needs to be explained is that the black start process of the grid A is started in the form of partitions, and then networking is carried out after the partition grid is formed. Taking the GD joint division as an example, the C power plant is used as the black start unit to carry out the black start of the GD joint division, and the high-voltage direct current transmission system is added to the black start process. The implementation process is as follows:
[0076] Step 1: Read in the data parameters of the bus, lines, transformers, high reactance, generators, important loads and DC drop points in the power network to be started, and establish a network connection model. Among them, the data parameters of the DC drop point of the GD joint partition are shown in Table 1.
[0077] Table 1 DC drop point data parameters of GD joint partition
[0078] ...
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The invention discloses a black start method considering the participation of a high-voltage direct current transmission system and belongs to the technical field of power system operation and control. The method calculates the weight of each branch and the shortest weighted path by establishing a network connection model, and simplifies the start-up process by judging whether the DC effective inertia constant and the short-circuit capacity at the commutation bus meet the DC system start-up conditions; establishes start-up priority indicators and The black start recovery optimization model calculates the optimal power flow value, determines the starting mode according to whether the calculation results converge, and finally updates the data parameters of the power network, and repeats the above process until all generators to be started in the power network are successfully started. This method fully considers the influence factors of starting the HVDC transmission system on the current power network, quickly judges whether the HVDC transmission system can be started in a relatively simple way, and speeds up the black start process of the power network while ensuring the stability of the power system.
Description
technical field [0001] The invention belongs to the technical field of power system operation and control, and in particular relates to a black start method considering the participation of a high-voltage direct current transmission system. Background technique [0002] The power system is recognized as the most complex man-made system. As a network structure, the chain reaction induced by local faults will lead to large-scale power outages, and even lead to the collapse of the entire power grid, resulting in huge economic losses. When a large-scale accident occurs and the power grid is completely black, the rapid recovery after the fault is a major problem faced by the operation and planning of the modern power system. Realizing the self-recovery of the power grid is an inevitable choice to ensure both network complexity and security. At present, the self-healing ability of the power grid is recognized as the core feature of the future smart grid, and a large number of func...
Claims
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IPC IPC(8): H02J3/36
CPCH02J3/36H02J2203/20Y02E60/60
Inventor 罗钢刘崇茹李欣蔚娄源媛钱峰吴国炳杨国银李力
Owner POWER DISPATCHING CONTROL CENT OF GUANGDONG POWER GRID CO LTD