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学者姓名：刘宝谨
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Abstract ：
A grid-forming converter (GFM) controls power output by adjusting the phase angle and amplitude of its output voltage, providing voltage and frequency support to the power system and effectively enhancing system stability. However, it has limitations in current control, influencing the current only indirectly through voltage regulation, which results in weaker control over current waveform quality. In the context of a large number of renewable energy generation units being connected to the grid, harmonics in the grid voltage can lead to excessively high harmonic content in the grid current, exceeding standard limits and causing oscillations. To solve this problem, this paper proposes a control strategy of harmonic voltage feedforward compensation to suppress grid current distortion. The proposed control strategy extracts harmonic voltages from the output port of the GFM converter through a harmonic extraction module, processes them via a feedforward factor, and introduces the resulting signals into the converter's control loop as feedforward compensation terms. This allows the converter's output voltage to compensate for the harmonic components in the grid, achieving the improvement of grid current and reducing the total harmonic distortion (THD) value. The effectiveness of the proposed control strategy is verified by simulation results.
Keyword ：
grid current quality grid current quality grid-forming converter grid-forming converter voltage feedforward voltage feedforward
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| GB/T 7714 | Liu, Baojin , Yu, Bing , Zheng, Feng . Grid Current Distortion Suppression Based on Harmonic Voltage Feedforward for Grid-Forming Inverters [J]. | ELECTRONICS , 2025 , 14 (5) . |
| MLA | Liu, Baojin 等. "Grid Current Distortion Suppression Based on Harmonic Voltage Feedforward for Grid-Forming Inverters" . | ELECTRONICS 14 . 5 (2025) . |
| APA | Liu, Baojin , Yu, Bing , Zheng, Feng . Grid Current Distortion Suppression Based on Harmonic Voltage Feedforward for Grid-Forming Inverters . | ELECTRONICS , 2025 , 14 (5) . |
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The measurement data of power systems are often mixed with a lot of noise due to the interference of the external environment. In order to eliminate the effect of noise, it is significant to denoise the noisy data to obtain the real state measurements. In order to deal with the problem of insufficient interpretability in existing data-driven denoising methods, a hybrid physical-data driven denoising model (PDDM) based on the stacked denoising autoencoder (SDAE) is proposed. First, the previous knowledge is extracted from the physical model of the generator. Physical constraints are designed based on the inherent relationships between rotor angle, angular frequency, and power. Second, based on SDAE deep-learning (DL) model, physical constraints are embedded into the loss function to guide the training of a neural network. The derivatives of denoised data are leveraged in anticipation of satisfying the differential-algebraic equations. The physical process is directly approximated by the neural network in this method, making the outputs satisfy the physical laws. The reliability and interpretability of the denoising results are improved. Meanwhile, the dependence on datasets is reduced by virtue of the hybrid physical-data driven mode. The robustness is still maintained. Finally, it is verified in the 39-bus New England system and a realistic regional power system. The real noisy data are also taken into account in testing to verify its extensibility. The test results show that the method proposed can achieve a satisfactory effect in both denoising accuracy and generalization capability.
Keyword ：
Accuracy Accuracy Data recovery Data recovery deep learning (DL) deep learning (DL) Generators Generators Noise Noise Noise measurement Noise measurement Noise reduction Noise reduction Phasor measurement units Phasor measurement units physics-informed neural networks (PINNs) physics-informed neural networks (PINNs) Pollution measurement Pollution measurement Power measurement Power measurement power system power system Power system stability Power system stability stacked denoising autoencoder (SDAE) stacked denoising autoencoder (SDAE) Training Training
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| GB/T 7714 | Wang, Huaiyuan , Zhang, Shiping , Liu, Baojin . Hybrid Physical-Data Driven Model for Denoising of Generator State Measurements [J]. | IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT , 2025 , 74 . |
| MLA | Wang, Huaiyuan 等. "Hybrid Physical-Data Driven Model for Denoising of Generator State Measurements" . | IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT 74 (2025) . |
| APA | Wang, Huaiyuan , Zhang, Shiping , Liu, Baojin . Hybrid Physical-Data Driven Model for Denoising of Generator State Measurements . | IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT , 2025 , 74 . |
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能量路由器的核心元件为双有源桥(dual active bridge,DAB)直流变压器，针对其短路故障时电流上升速率快，峰值大，导致DAB内部电力电子器件闭锁的问题，该文提出一种具有限流型结构的直流变压器，限流装置结构为从DAB高压侧H桥连接单相整流桥，再与输出端口的限流电感相连。当直流系统发生短路故障时，限流型直流变压器采用混合控制算法进行整流，为限流电感提供钳位电压，限制故障电流的峰值，并与断路器配合实现无弧开断，该方法避免DAB中电力电子器件发生闭锁，快速实现故障限流和隔离。在仿真系统中搭建了基于10kV/750V直流变压器的限流型直流变压器的模型，仿真结果表明限流型直流变压器与断路器配合实现故障限流和隔离的有效性和可行性。
Keyword ：
故障限流和隔离 故障限流和隔离 断路器无弧开断 断路器无弧开断 混合控制算法 混合控制算法 限流型直流变压器 限流型直流变压器
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| GB/T 7714 | 郑峰 , 陈俞澄 , 林燕贞 et al. 限流型直流变压器拓扑结构及其暂态特性研究 [J]. | 电网技术 , 2024 , 48 (08) : 3476-3482 . |
| MLA | 郑峰 et al. "限流型直流变压器拓扑结构及其暂态特性研究" . | 电网技术 48 . 08 (2024) : 3476-3482 . |
| APA | 郑峰 , 陈俞澄 , 林燕贞 , 刘莞玲 , 刘宝谨 , 梁宁 . 限流型直流变压器拓扑结构及其暂态特性研究 . | 电网技术 , 2024 , 48 (08) , 3476-3482 . |
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针对低惯性直流微电网中母线电压易受网内功率波动影响的问题，提出了一种基于改进模型预测的直流微电网并网变换器自适应虚拟惯性控制策略。首先，电压外环引入自适应类虚拟同步发电机控制，通过将控制方程中的虚拟惯性参数与电压变化率结合起来，实现虚拟惯性参数的灵活可调。其次，在电流内环引入模型预测控制，并采用改进延时补偿算法，实现对给定电流值快速跟踪的同时改善控制系统的动态特性。最后，基于Matlab/Simulink建立了系统模型进行仿真。结果表明，与传统的虚拟惯性控制策略相比较，所提控制策略下的直流母线电压波动幅值更小且动态性能更佳，可以有效提高直流母线电压的稳定性和直流微电网的惯性。
Keyword ：
并网变换器 并网变换器 模型预测控制 模型预测控制 直流微电网 直流微电网 自适应虚拟惯性控制 自适应虚拟惯性控制
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| GB/T 7714 | 郑峰 , 苏明鸿 , 陈静 et al. 基于改进模型预测的并网变换器自适应虚拟惯性控制策略研究 [J]. | 电力系统保护与控制 , 2024 , 52 (13) : 35-46 . |
| MLA | 郑峰 et al. "基于改进模型预测的并网变换器自适应虚拟惯性控制策略研究" . | 电力系统保护与控制 52 . 13 (2024) : 35-46 . |
| APA | 郑峰 , 苏明鸿 , 陈静 , 刘宝谨 , 刘莞玲 , 梁宁 . 基于改进模型预测的并网变换器自适应虚拟惯性控制策略研究 . | 电力系统保护与控制 , 2024 , 52 (13) , 35-46 . |
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There is a problem that the inertia of DC microgrid is low and it is easy for the voltage of a DC bus to be affected by power fluctuation in the network. Thus an adaptive virtual inertia control strategy based on improved model prediction for grid-connected converter of DC microgrid is proposed. First, adaptive analog virtual synchronous generator control is introduced into the voltage outer loop and, by combining the inertial parameters with the voltage change rate, flexible adjustment of the inertial parameters is realized. Secondly, model predictive control is applied in the current inner loop, along with an improved delay compensation algorithm, to achieve fast tracking of the desired current value and enhance the dynamic characteristics of the control system. Finally, a system model is established based on Matlab/Simulink for simulation. The results show that, compared with the traditional virtual inertia control strategy, the DC bus voltage fluctuation amplitude of the proposed control strategy is smaller and the dynamic performance is better. This can effectively improve the stability of the DC bus voltage and the inertia of the DC microgrid. © 2024 Power System Protection and Control Press. All rights reserved.
Keyword ：
adaptive virtual inertia control adaptive virtual inertia control DC microgrid DC microgrid grid-connected converter grid-connected converter model predictive control model predictive control
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| GB/T 7714 | Zheng, F. , Su, M. , Chen, J. et al. An adaptive virtual inertia control strategy for a grid-connected converter based on improved model prediction; [基于改进模型预测的并网变换器自适应虚拟惯性控制策略研究] [J]. | Power System Protection and Control , 2024 , 52 (13) : 35-46 . |
| MLA | Zheng, F. et al. "An adaptive virtual inertia control strategy for a grid-connected converter based on improved model prediction; [基于改进模型预测的并网变换器自适应虚拟惯性控制策略研究]" . | Power System Protection and Control 52 . 13 (2024) : 35-46 . |
| APA | Zheng, F. , Su, M. , Chen, J. , Liu, B. , Liu, W. , Liang, N. . An adaptive virtual inertia control strategy for a grid-connected converter based on improved model prediction; [基于改进模型预测的并网变换器自适应虚拟惯性控制策略研究] . | Power System Protection and Control , 2024 , 52 (13) , 35-46 . |
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Fault isolation is an important technology to help guarantee that a DC system can be operated stably. A new fault isolation strategy is proposed to improve the traditional strategy which relies too much on a high-performance DC circuit breaker (DCCB). The new strategy makes use of the coordination between a flexible current limiting device (FCLD) and a DCCB. First, the cooperative mechanism between the FCLD and DCCB under permanent fault and transient fault is researched. Second, the arc transient characteristic of the interruption of the DCCB considering suppressed current from the FCLD is analyzed. Finally, a simulation is carried out on the Matlab/Simulink platform to verify the feasibility of the new cooperative strategy. The results show that FCLD can inhibit the breaking arc effectively; with this new fault isolation strategy, the DC system can finish ride through smoothly in the transient fault, while the DCCB can complete the no arc break in the permanent fault. The new strategy has reduced the breaking requirements for DCCB in terms of the DC system’s fault isolation, and improved the fault ride-through capability of the DC system. © 2024 Power System Protection and Control Press. All rights reserved.
Keyword ：
Electric circuit breakers Electric circuit breakers Electric power system protection Electric power system protection Flexible electronics Flexible electronics MATLAB MATLAB Simulation platform Simulation platform Timing circuits Timing circuits
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| GB/T 7714 | Zheng, Feng , Wang, Weidong , Liu, Baojin et al. Research on transient characteristic of arc suppression considering the joint operation of a flexible current limiting device and a DC circuit breaker [J]. | Power System Protection and Control , 2024 , 52 (2) : 60-69 . |
| MLA | Zheng, Feng et al. "Research on transient characteristic of arc suppression considering the joint operation of a flexible current limiting device and a DC circuit breaker" . | Power System Protection and Control 52 . 2 (2024) : 60-69 . |
| APA | Zheng, Feng , Wang, Weidong , Liu, Baojin , Liu, Wanling , Liang, Ning . Research on transient characteristic of arc suppression considering the joint operation of a flexible current limiting device and a DC circuit breaker . | Power System Protection and Control , 2024 , 52 (2) , 60-69 . |
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Grid-forming inverters, which are represented by droop control and virtual synchronous generator control, have been widely studied and applied because of their excellent grid-supporting ability and smooth off-grid switching. When a grid-forming inverter is connected to a microgrid or utility grid, the control loops of active power and reactive power will be coupled because of the voltage phase difference, which will affect the power control performance. This paper first derives the small-signal linearized model of the system, based on which a frequency feedforward control and an amplitude feedforward control are proposed to decouple the active power and reactive power control loops, respectively. The proposed decoupling strategy directly modifies the reference values through feedforward with an easily implementable principle that is applicable to various control coordinate systems, control coordinate systems, and control structures. By comparing system models with and without the proposed decoupling strategy, its effectiveness can be theoretically proven. Time-domain simulations and hardware experiments are presented to further validate its effectiveness.
Keyword ：
feedforward control feedforward control grid-forming inverter grid-forming inverter power decoupling power decoupling
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| GB/T 7714 | Liu, Baojin , Song, Zhaofeng , Yu, Bing et al. A Feedforward Control-Based Power Decoupling Strategy for Grid-Forming Grid-Connected Inverters [J]. | ENERGIES , 2024 , 17 (2) . |
| MLA | Liu, Baojin et al. "A Feedforward Control-Based Power Decoupling Strategy for Grid-Forming Grid-Connected Inverters" . | ENERGIES 17 . 2 (2024) . |
| APA | Liu, Baojin , Song, Zhaofeng , Yu, Bing , Yang, Gongde , Liu, Jinjun . A Feedforward Control-Based Power Decoupling Strategy for Grid-Forming Grid-Connected Inverters . | ENERGIES , 2024 , 17 (2) . |
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直流系统的故障隔离是保证直流系统稳定运行的重要技术。针对传统故障隔离策略对直流断路器(direct current circuit breaker, DCCB)的性能要求较高的问题，提出了一种利用柔性限流装置(flexible current limiting device,FCLD)与DCCB协同动作的故障隔离策略。首先，研究了直流系统永久性故障和瞬时性故障情况下FCLD与DCCB的协同作用机理。其次，分析考虑FCLD电流抑制作用下DCCB开断过程的电弧暂态特性。最后，在Matlab/Simulink平台中进行仿真，验证所提协同策略的可行性。结果表明：FCLD可有效抑制DCCB的开断电弧；基于所提故障隔离策略，直流系统可在瞬时故障情况下实现平稳穿越，永久故障情况下实现DCCB的无弧开断。该策略降低了直流系统故障隔离过程中对DCCB的开断要求，提升了直流系统的故障穿越能力。
Keyword ：
协同配合 协同配合 故障隔离策略 故障隔离策略 柔性限流装置 柔性限流装置 直流断路器 直流断路器 直流系统 直流系统
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| GB/T 7714 | 郑峰 , 王威东 , 刘宝谨 et al. 计及柔性限流装置与直流断路器协同动作的电弧抑制暂态特性研究 [J]. | 电力系统保护与控制 , 2024 , 52 (02) : 59-69 . |
| MLA | 郑峰 et al. "计及柔性限流装置与直流断路器协同动作的电弧抑制暂态特性研究" . | 电力系统保护与控制 52 . 02 (2024) : 59-69 . |
| APA | 郑峰 , 王威东 , 刘宝谨 , 刘莞玲 , 梁宁 . 计及柔性限流装置与直流断路器协同动作的电弧抑制暂态特性研究 . | 电力系统保护与控制 , 2024 , 52 (02) , 59-69 . |
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As a complex dynamically strongly coupled system, DC distribution system often suffers from voltage collapse due to system resonance. In order to suppress distribution network resonance and bus voltage fluctuation, this paper proposes a hybrid control algorithm to suppress DC distribution system resonance to further enhance DC system stability. In this paper, the output voltage of the line regulation converter (LRC) is the target of the study. A current prediction model is introduced in the inner loop of the converter control, which can enhance the dynamic responsiveness of the system and eliminate the PWM modulator and parameter tuning, achieve the unitization of the inner loop of the current. By constructing the inverse model of the controlled object, the outer voltage loop is unitized under the control of two-degree-of-freedom. The hybrid control enables the bus voltage to follow the reference voltage exactly, which suppresses resonance peaks in the voltage transfer function and reduces bus voltage fluctuations. Finally, the proposed hybrid control algorithm is simulated and verified in MATLAB/Simulink platform. The results show that the control strategy can effectively suppress the resonance and bus voltage fluctuation of the DC distribution system and enhance the dynamic characteristics and anti-interference capability of the distribution network.
Keyword ：
DC distribution system DC distribution system hybrid control algorithm hybrid control algorithm model predictive control model predictive control resonance suppression resonance suppression stability analysis stability analysis
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| GB/T 7714 | Zheng, Zonghua , Wu, Xudong , Zheng, Feng et al. Resonance suppression strategy of DC distribution system based on reduced-order hybrid control algorithm [J]. | FRONTIERS IN ENERGY RESEARCH , 2023 , 11 . |
| MLA | Zheng, Zonghua et al. "Resonance suppression strategy of DC distribution system based on reduced-order hybrid control algorithm" . | FRONTIERS IN ENERGY RESEARCH 11 (2023) . |
| APA | Zheng, Zonghua , Wu, Xudong , Zheng, Feng , Liu, Baojin , Liang, Ning . Resonance suppression strategy of DC distribution system based on reduced-order hybrid control algorithm . | FRONTIERS IN ENERGY RESEARCH , 2023 , 11 . |
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Aiming at the problem that the bus voltage in a low-inertia DC microgrid is prone to be affected by internal power fluctuations, an adaptive virtual inertia control strategy for a grid-connected converter of a DC microgrid based on an improved model prediction is proposed. Firstly, the adaptive analog virtual synchronous generator (AVSG) is introduced into the voltage outer loop by combining the inertial parameters with the voltage change rate, and the flexible adjustment of the inertial parameters is realized. Secondly, the improved model predictive control is introduced into the current inner loop to realize the fast-tracking of the given current value and improve the dynamic characteristics of the control system. Finally, a system model is established based on Matlab/Simulink for simulation. The results show that compared with the traditional virtual inertia control strategy, the proposed control strategy has smaller bus voltage fluctuation amplitude and better dynamic performance; when a 10 kW load mutation occurs, the magnitude of bus voltage drop is reduced by 60%, and the voltage recovery time is shortened by 30%. The proposed control strategy can effectively improve the stability of DC bus voltage and the operation ability of the system under asymmetric conditions.
Keyword ：
adaptive virtual inertia control adaptive virtual inertia control bidirectional grid-connected converter bidirectional grid-connected converter DC microgrid DC microgrid dynamic performance dynamic performance model predictive control model predictive control
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| GB/T 7714 | Zheng, Feng , Su, Minghong , Liu, Baojin et al. Adaptive Virtual Inertia Control Strategy for a Grid-Connected Converter of DC Microgrid Based on an Improved Model Prediction [J]. | SYMMETRY-BASEL , 2023 , 15 (11) . |
| MLA | Zheng, Feng et al. "Adaptive Virtual Inertia Control Strategy for a Grid-Connected Converter of DC Microgrid Based on an Improved Model Prediction" . | SYMMETRY-BASEL 15 . 11 (2023) . |
| APA | Zheng, Feng , Su, Minghong , Liu, Baojin , Liu, Wanling . Adaptive Virtual Inertia Control Strategy for a Grid-Connected Converter of DC Microgrid Based on an Improved Model Prediction . | SYMMETRY-BASEL , 2023 , 15 (11) . |
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