Motor‐generator pair: a novel solution to provide inertia and damping for power system with high penetration of renewable energy

Wei, Siming; Zhou, Yifei; Xu, Guorui; Huang, Yuehui

doi:10.1049/iet-gtd.2016.1894

Cited by 22 publications

(10 citation statements)

References 22 publications

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“…Then a synchronous motor-generator pair (MGP) system for renewable energy integration is proposed in [12,13] to improve the grid stability, and some research has been done. In [13,14], the small-signal model of MGP is systematically established and the damping characteristics is analysed, which demonstrate that the damping ratio is higher than that of the traditional units and MGP can effectively enhance frequency response and damp oscillation. And in [15], the power angle stability of MGP system is studied through simulation and the results show MGP has a longer critical fault-clearing time than traditional units.…”

Section: Introductionmentioning

confidence: 99%

Vector control strategy for motor‐generator pair drive inverters in parallel operation

Huang

Guan

et al. 2021

IET Renewable Power Gen

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In view of the weak moment of inertia for power system with high penetration of renewable energy and limited transient voltage support of power electronics, a synchronous motor-generator pair (MGP) is proposed as a possible solution for renewable energy integration to improve grid stability. In order to realize the large-scale renewable energy integration, parallel inverters drive MGP is an ideal control scheme. Firstly, the working principle and mathematical model of MGP are introduced. Then based on a comparative analysis of control of parallel inverters and torque control of synchronous motors, the decoupling vector control method of MGP is proposed. Considering the linear relation between q-axis current and the active power in the rotor flux-oriented mode, the strategy of parallel drive for MGP with vector control is established. Different control loop for offgrid and grid-connected operation is designed, and effectiveness of this control strategy is verified by simulation. Finally, a 5 kW MGP experimental platform with dual inverters is built, the parameters are selected to test stability of the system, and power distribution and efficiency are studied. The results indicate that the parallel operation of MGP is stable under dynamic conditions, the strategy can realize the independent control of each inverter.

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Section: Introductionmentioning

confidence: 99%

Vector control strategy for motor‐generator pair drive inverters in parallel operation

Huang

Guan

et al. 2021

IET Renewable Power Gen

Self Cite

View full text Add to dashboard Cite

show abstract

“…Due to the characteristics similar to the conventional thermal power unit, the motor–generator pair (MGP) proposed in [15] can be a prospective method to improve the stability of power system with high penetration of RE. In [16], the grid connection of RE via the MGP can enhance the transient stability of power system with analysis of small‐signal stability. The source‐grid difference control method for the MGP system is investigated and the stability of the control system analysed in [17].…”

Section: Introductionmentioning

confidence: 99%

Effects of motor–generator pair system on improving inertial response and primary frequency regulation capability of renewable energy

Huang

et al. 2021

IET Renewable Power Gen

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The increasing penetration of renewable energy leads to the decrease of inertia and damping for replacing conventional power plants. The motor–generator pair (MGP) is proposed to improve inertial response and frequency regulation capability for the renewable energy. First, the mathematical model of the MGP and the control method of DC‐link voltage are given. Then, the inertial characteristics of the MGP are analysed, and a mass block is designed by analysing the key factor affecting the moment of inertia. The transient processes in two machines are discussed by comparing the variations of the voltage and current vectors. It turns out that the electromagnetic–mechanical coupling is the key to realise the primary frequency regulation without frequency acquisition. The photovoltaic (PV) is chosen to illustrate the mechanism of achieving a better primary frequency response with DC‐link voltage control methods based on the de‐loading and additional frequency deviation strategies. A grid‐scale simulation model is built to verify the effectiveness of the proposed scheme. Furthermore, six groups of experiments are designed and performed on an experimental bench. The simulation and experimental results demonstrate that the inertial response and primary frequency response of PV can be improved effectively by adopting MGP for grid connection.

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“…The increasing penetration of wind power into the power systems around the world has led to various challenges due to the massive presence of non‐synchronous generators in the power systems [2]. Among other problems, automatic generation control (AGC) is of great concern under the high wind penetration conditions, since additional wind installations will degrade the frequency response of power systems and increase the regulation requirement [3, 4].…”

Section: Introductionmentioning

confidence: 99%

Active power dynamic interval control based on operation data mining for wind farms to improve regulation performance in AGC

Liu

Wang

Chen

et al. 2020

IET Generation Trans & Dist

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With the real‐time changes of wind speed and operating conditions, it is a challenge to fully tap the active power regulation ability and improve the control performance of automatic generation control (AGC) in a wind farm (WF). The essence of tapping the active power regulation ability is to realise the coordination and complementarity of each wind turbine's (WT's) dynamic adjustment performance (DAP). To address this, a novel data mining method is developed to derive the internal relations between WTs’ output power and pitch angle, impeller speed and pitch angle during the power adjustment process, and a unified mechanism model is established to describe DAP of WTs. Based on the discovered relationship between WTs’ DAP and its operating states, an active power distribution algorithm and a dynamic interval control method are proposed. Then, an active power dynamic interval control strategy that has been implemented using Java script in MyEclipse for WFs is further developed. The control strategy has been tested and applied in a 50 MW WF in northwest China. The preliminary results showed that the control strategy has improved the rapidity and accuracy of AGC in the WF.

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Motor‐generator pair: a novel solution to provide inertia and damping for power system with high penetration of renewable energy

Cited by 22 publications

References 22 publications

Vector control strategy for motor‐generator pair drive inverters in parallel operation

Vector control strategy for motor‐generator pair drive inverters in parallel operation

Effects of motor–generator pair system on improving inertial response and primary frequency regulation capability of renewable energy

Active power dynamic interval control based on operation data mining for wind farms to improve regulation performance in AGC

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