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Multi-region cooperative joint frequency modulation control method based on dual-layer model predictive structure

A technology of model prediction and control method, applied in photovoltaic power generation, wind power generation, AC network circuit, etc., can solve the problem of inability to apply joint frequency modulation control system, and achieve the effect of ensuring safety

Pending Publication Date: 2018-12-07
WIND POWER TECH CENT OF GANSU ELECTRIC POWER +2
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Problems solved by technology

Therefore, in view of the characteristics of the hierarchical and partitioned control structure of multi-regional AGC units, both the centralized model predictive control and the decentralized model predictive control have certain defects, and cannot be applied to the combined regional power grid that is suitable for high-proportion renewable energy penetration. Frequency Modulation Control System Design

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  • Multi-region cooperative joint frequency modulation control method based on dual-layer model predictive structure
  • Multi-region cooperative joint frequency modulation control method based on dual-layer model predictive structure
  • Multi-region cooperative joint frequency modulation control method based on dual-layer model predictive structure

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Embodiment Construction

[0054] Embodiments of the present invention will be briefly described below with reference to the drawings.

[0055] The specific control block diagram is as figure 1 As shown, a multi-regional cooperative joint frequency modulation control method based on a two-layer model prediction structure is characterized in that: the lower layer decomposes the entire multi-regional AGC system into several independent but coupled subsystems based on the distribution The MPC control realizes the dynamic frequency optimization control of the sub-system; the upper layer integrates the economic performance of multi-region AGC units to realize the overall economical optimal distribution of steady-state power of AGC units.

[0056] Specific steps include:

[0057] 1) Establish a discrete state-space model for economical MPC control at the steady-state optimization level: select a vector composed of AGC unit output and AC tie-line exchange power in multiple regions according to the power bala...

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Abstract

The invention provides a multi-region cooperative joint frequency modulation control method based on a dual-layer model predictive structure. The method realizes the steady-state power optimized application of cross-regional AGC units under the multi-constraint condition on the basis of the economic model predictive control in the upper layer; and the dynamic frequency optimization control of themulti-region AGC units on the basis of the distributed model predictive control is realized in the lower layer. On the slow time scale (minutes), the steady-state power optimized allocation of the cross-regional AGC units considering the safety constraints of tie line sections is realized. On the short time scale (seconds), the dynamic frequency optimization control of the AGC units in each regionis realized.

Description

technical field [0001] The present invention relates to the field of collaborative control of multi-area interconnected power grids, in particular to a multi-area cooperative joint frequency modulation control method based on a double-layer model prediction structure, which is applicable to joint frequency modulation control systems for high-proportion renewable energy penetration regional power grids design. Background technique [0002] With the gradual expansion of the grid-connected scale of wind power, photovoltaic and other renewable energy sources, the intermittence and random fluctuation of their output have brought huge regulatory pressure to the peak-shaving and frequency-regulation of the sending-end power grid. The main reasons are as follows: First, each interconnected regional system is controlled according to the tie line plan and DC transmission plan, and each regional system can only regulate the resources of the regional system, which restricts the consumpt...

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Application Information

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IPC IPC(8): H02J3/24H02J3/38
CPCH02J3/383H02J3/386H02J3/24Y02E10/56Y02E10/76
Inventor 陈钊汪宁渤马彦宏丁坤赵龙周强马明王定美张艳丽吕清泉周识远李津张珍珍黄蓉张金平张健美王明松张睿骁高鹏飞
Owner WIND POWER TECH CENT OF GANSU ELECTRIC POWER
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