Dynamic Voltage Control Based on DMPC for Active Distribution Network with Distributed Energy Storage Systems

doi:10.12204/j.issn.1000-7229.2021.06.012

Abstract

Abstract:

In order to solve the voltage violation problem in a distribution network that integrates multiple distributed generators, this paper proposes a method based on distributed model predictive control for coordination of PVs and energy storage systems and for dynamic voltage regulation in a distribution network containing distributed energy storage systems. Firstly, we analysis dynamic characteristics of distributed PVs, energy storage systems and voltage sensitivity model of the distribution network, and construct the whole distribution network model considering dynamic characteristics. Considering large scale and numerous devices of distribution network, we divide it into several subsystems through ε decomposition. Then, this paper designs distributed model predictive controller containing various limits of PVs and energy storage systems and transfers this into solving a QCQP problem to optimize control instructions, and then restoring from voltage violation fast in distribution network. Finally, the simulation result in IEEE 33-node network verifies the validity of proposed method.

Key words: distributed model predictive control, distributed generator, active distribution network, dynamic voltage control

CLC Number:

TM73

LI Guixin, XU Ke, LIU Yingying, Lü Yongqing, DOU Xiaobo, CHI Fujian. Dynamic Voltage Control Based on DMPC for Active Distribution Network with Distributed Energy Storage Systems[J]. ELECTRIC POWER CONSTRUCTION, 2021, 42(6): 116-126.

Figures/Tables 29

Fig.1 Dynamic model of distributed PV。。

Fig.2 Q-V characteristic of PV

Fig.3 Dynamic model of distributed ES

Fig.4 Influence zone of distributed generators

Fig.5 Schematic diagram of MPC

Fig.6 Active distribution simulation test topology based on IEEE 33-node system

Fig.7 Active power output of PVs in case 1

Fig.8 Voltage of some nodes in IEEE 33-node system in case 1

Fig.9 Voltages of some nodes in IEEE 33-node system after control in case 1

Fig.10 Waveform of active power of energy storages in case 1

Fig.11 Waveform of reactive power of energy storages in case 1

Fig.12 Waveform of reactive power of PVs in case 1

Fig.13 Active power output of PVs in case 2

Fig.14 Voltages of some nodes in IEEE 33-node system in case 2

Fig.15 Voltage of some nodes in IEEE 33-node system after control in case 2

Fig.16 Waveform of active power of energy storage in case 2

Fig.17 Waveform of reactive power of energy storage in case 2

Fig.18 Waveform of reactive power of PVs in case 2

Table A1 Load parameter of IEEE 33-node distribution network

Table A2 Line parameters of IEEE 33-node distribution network

Table A3 Configuration of DGs

Fig.B1 Waveform of interactive powers between coordinating areas in case 1

Fig.B2 Waveform of control sequences of devices during dynamic process in area 1 in case1

Fig.B3 Waveform of control sequences of devices during dynamic process in area 2 in case 1

Fig.B4 Waveform of control sequences of devices during dynamic process in area 3 in case 1

Fig.B5 Waveform of powers between coordinating areas in case 2

Fig.B6 Waveform of control sequences of devices during dynamic process in area 1 in case 2

Fig.B7 Waveform of control sequences of devices during dynamic process in area 2 in case 2

Fig.B8 Waveform of control sequences of devices during dynamic process in area 3 in case 2

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