Decomposition-Based Stability Analysis for Isolated Power Systems With Reduced Conservativeness

Qin, Boyu; Ma, Jin; Li, Wei; Ding, Tao; Sun, Haoyuan; Zomaya, Albert Y.

doi:10.1109/tase.2020.2969475

Cited by 17 publications

(6 citation statements)

References 24 publications

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“…Constraint (33) enforces the outputs of wind farms and photovoltaic power stations, in which p w,max , p w,min denote the upper and lower limits of the active power of a wind farm w. Similarly, p p,max , p p,min denote the limits of solar power. Additionally, in order to ensure a safe, reliable, and continuous supply of electricity, the power system is required to have a certain amount of reserve capacity in case of uncertainties such as the failure of new energy units and deviations from the predicted output.…”

Section: Operation Strategymentioning

confidence: 99%

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Enhancing System Reliability and Transient Voltage Stability through Optimized Power Sources and Network Planning

Li,

Liu,

Wang

et al. 2023

Electronics

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Renewable energy is an important means of addressing climate change and achieving carbon peaking and carbon neutrality goals. However, the uncertainty and randomness of renewable energy also have a certain impact on the flexibility, reliability, and transient voltage stability of the power system. These effects also pose great challenges to power system planning. In order to address the impact of renewable energy on power system planning, this paper proposes a two-layer optimization model for power sources and network planning which takes into account both reliability and transient voltage stability requirements. The upper-layer grid planning problem is formulated with consideration of the system reliability index, and the transient stability requirements and construction and operation costs are included in the lower-layer problem to determine a construction scheme for power generation and energy storage units. To solve the complex nonlinear problem efficiently, a two-layer iterative algorithm utilizing the adaptive particle swarm optimization (PSO) technique is proposed. The effectiveness of the proposed method is demonstrated via its application to the IEEE 33 test system. The results show that the proposed optimization approach effectively addresses the power system transmission and generation planning problem while improving the efficiency and reliability of the system’s operation. The findings can guide the design and implementation of future power system planning and operation strategies.

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Section: Operation Strategymentioning

confidence: 99%

“…According to the input-to-state stability (ISS) theory [33], the system must satisfy the stability constraint as follows to ensure the transient voltage stability level of the system.…”

mentioning

confidence: 99%

Enhancing System Reliability and Transient Voltage Stability through Optimized Power Sources and Network Planning

Li,

Liu,

Wang

et al. 2023

Electronics

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“…The fault current i k is mainly provided b rent of the capacitors in the sub-modules. transient characteristics analysis, the sho to the RLC second-order circuit [9]. Usua the discharging process of the sub-modu overdamped second-order oscillatory pro • NSFCL: a kind of structure of NSFCL, called capacitor-based FCL (CBFCL), is proposed in [57] and the power circuit structure of the CBFCL is shown Figure 16.…”

Section: Current-limiting Effect Of T Influence On DC Sysmentioning

confidence: 99%

“…By providing the possibility of interconnections between asynchronous power systems and various renewable energy resources [8], MMC-based MTDC power grids can potentially enhance the reliability of the AC and DC systems and improve the flexibility and economy of power dispatching [7]. It is playing an important role in future development of smart grids and the global power interconnection [9][10][11][12][13][14]. However, the application of MMC-based MTDC power grids brings several technical challenges.…”

Section: Introductionmentioning

confidence: 99%

Review on Short-circuit Current Analysis and Suppression Techniques for MMC-HVDC Transmission Systems

et al. 2020

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The modular multilevel converter (MMC) has been widely adopted in high voltage direct current (HVDC) transmission systems due to its significant advantages. MMC-HVDC is developing towards multi-terminal direct current (MTDC) power grid for reliability enhancement. However, there exist a huge amplitude and a steep rise in fault current due to the low impedances of DC lines and MMCs, which threaten the security and reliability of the DC power grids. It is necessary to restrain the DC short circuit current in order to ensure the safe and stable operation of DC power grids. This paper gives a comprehensive review and evaluation of the proposed DC short-circuit current analysis and suppression techniques used in MMC-based MTDC power girds, in terms of MMC modeling, short circuit calculation, and suppression method. In addition, future trends of countermeasures to short circuit current in MMC-based MTDC power grids are also discussed.

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“…As the major cause responsible for a number of black‐outs, voltage instability has drawn a wide attention among various stability issues [5]. The incidents of the system black‐out due to voltage instability leading to voltage collapse have been reported in the last few decades, which caused considerable economic losses [6]. In many of these events, progressive voltage drops lead to cascading outages of transmission lines associated with rotor angle instabilities, eventually collapsing entire networks [7, 8].…”

Section: Introductionmentioning

confidence: 99%

CNN‐LSTM based power grid voltage stability emergency control coordination strategy

Zhang

Qin

Gao

et al. 2023

IET Generation Trans & Dist

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The occurrence of cascading failure and small probability contingency in hybrid AC/DC power grid aggravates the mismatch risk of traditional emergency control with offline‐predetermination–online‐practice (ODOP) mode. To ensure the voltage stability of power grid under large disturbances, this paper proposes a voltage stability emergency control coordination strategy based on convolutional neural network (CNN) and long short‐term memory (LSTM) network. First, the mismatch mechanism of traditional emergency control is revealed under the variation of operating conditions. Second, the start criterion of complementary emergency control with ODOP mode is proposed, and the CNN‐LSTM network is established to quantitatively evaluate the voltage stability margin. Finally, the emergency control sensitivity index is proposed to predict the stability margin enhancement under alternative emergency control measures, and the optimal ODOP‐based emergency control strategy is determined to coordinate multiple voltage stability emergency control measures. Case studies are performed in the actual Northwest China local region hybrid AC/DC power grid with voltage instability problems, and the simulation results verify the effectiveness of the proposed method.

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Decomposition-Based Stability Analysis for Isolated Power Systems With Reduced Conservativeness

Cited by 17 publications

References 24 publications

Enhancing System Reliability and Transient Voltage Stability through Optimized Power Sources and Network Planning

Enhancing System Reliability and Transient Voltage Stability through Optimized Power Sources and Network Planning

Review on Short-circuit Current Analysis and Suppression Techniques for MMC-HVDC Transmission Systems

CNN‐LSTM based power grid voltage stability emergency control coordination strategy

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