Power transfer control within the framework of vehicle-to-house technology

International Journal of Electrical and Computer Engineering (IJECE)
Vol. 13, No. 4, August 2023, pp. 3817~3828
ISSN: 2088-8708, DOI: 10.11591/ijece.v13i4.pp3817-3828  3817
Journal homepage: http://ijece.iaescore.com
Power transfer control within the framework of
vehicle-to-house technology
Hicham Ben Sassi, Yahia Mazzi, Fatima Errahimi, Najia Es-Sbai
Laboratory of Intelligent Systems, Georesources and Renewable Energies, Faculty of Sciences and Technology, Sidi Mohamed Ben
Abdellah University, Fez, Morocco
Article Info ABSTRACT
Article history:
Received Aug 9, 2022
Revised Sep 10, 2022
Accepted Oct 1, 2022
The emerging vehicle-to-grid (V2G) technology has gained a lot of praise in
the last few years following its experimental validation in several countries.
As a result, this technology is being investigated for standalone houses under
the name of vehicle-to-house (V2H). This latter proposes a two-way power
transfer between electric vehicles and isolated houses relying on renewable
sources for power supply. In this paper an implementation of the V2H
technology is investigated, using the adaptive backstepping control approach
for the bidirectional half-bridge and the integral sliding mode control for the
direct current to direct current (DC-DC) converter. The robustness of the
controllers and their capability to respond to the desired performances were
tested using different realistic scenarios. The obtained results yielded, a
perfect sinusoidal output voltage with an amplitude of 220 V and a
frequency of 50 Hz. This is further been validated by a frequency analysis
resulting in a total harmonic distortion (THD) of 0.25%.
Keywords:
Adaptive backstepping control
Electric vehicle
power transfer control
Vehicle-to-house technology
DC-AC power inverter
This is an open access article under the CC BY-SA license.
Corresponding Author:
Hicham Ben Sassi
Laboratory of Intelligent Systems, Georesources and Renewable Energies, Faculty of Sciences and
Technology, Sidi Mohamed Ben Abdellah University
Box 2202, Fez, Morocco
Email: hicham.1bensassi@gmail.com
1. INTRODUCTION
The instability of the petroleum market and the greenhouse gas emissions of conventional vehicles
have inspired the development and vast adoption of electric vehicles [1], [2]. These environmentally friendly
transportation tools run on electricity provided by an electric grid instead of fuel. As a result, they are
expected to play a major role in meeting global goals on climate change. Nevertheless, the increasing power
demand by electric vehicles (EVs) is expected to jeopardize the stability of the electrical grids if not
controlled properly, resulting in a voltage dip, or line and transformer overloading [3]. In their quest to
resolve these hurdles, Kempton et al. proposed a new utilization of the EV, relying on vehicle-to-grid (V2G)
technology, as described in [4]. This latter allows the EVs to provide power back to the grid within the
context of smart grids [5]. Due to their intriguing characteristics, including substantial storage capacity and
tolerance for frequent power fluctuations, EVs are excellent candidates for this task [6], [7].
This paper proposes an EV home integration using vehicle-to-house technology (V2H) [8]. In
contrast with V2G, V2H is mostly deployed for homes without access to an electrical grid but rather relies on
renewable energy sources to fulfill their electricity requirements. As result, the EV could be used to support
the battery storage units of the standalone home in case of an emergency, such as heavy machinery operation,
or a shortage in photovoltaic (PV) production. The V2H setup adopted in this paper is illustrated in Figure 1.
It consists of a PV system, a battery storage unit, and an EV, in addition to the bidirectional direct current to
direct current (DC-DC) converter, and the direct current to alternating current (DC-AC) inverter.

 ISSN: 2088-8708
Int J Elec & Comp Eng, Vol. 13, No. 4, August 2023: 3817-3828
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The power transfer rate between the EV and the house within the framework of V2H can vary
significantly depending on the connected loads, the PV production, and the state of charge of the storage
systems [9]. As a result, robust control of the bidirectional power converters (DC-DC and DC-AC) is crucial,
to supply the required power regardless of the encountered scenario. In this regard, several control strategies
were proposed for the adopted buck-boost converter. The robustness characteristic of an adaptive sliding
mode based controller (SMC) was investigated in [10], for a SEPIC-Zeta converter. Furthermore, in [11], the
authors presented a Lyapunov-based hysteric controller to manage the power flow of a bidirectional
buck-boost converter. This latter is connected between the DC-bus and the main battery storage of an EV. In
[12], a hysteretic-modulation-based controller is designed based on the SMC technique to control a versatile
buck-boost converter for photovoltaic application.
Figure 1. V2H structure with a PV system
In this work, the integral sliding mode (ISM) strategy is suggested to control the amount of power
exchanged between the isolated house and the EV. In contrast to its conventional predecessor [13], the ISM
control incorporates an integral term in its sliding surface, which enables the integral sliding mode control
(ISMC) to avoid the reaching phase. Thus resulting in a quicker convergence time [14], [15].
Given that injecting power into the house is the key characteristic of the V2H technology, therefore,
appropriate control of the full-bridge inverter transforming the DC power to a convenient AC output is
crucial. In the literature, several linear controllers were proposed to oversee the power transfer of grid-tied
inverters [16], [17]. Nonetheless, the limitations associated with linear controllers in terms of stability under
sudden load variations, render their use inadvisable in our application. To overcome these issues, nonlinear
approaches such as the sliding mode control [18], [19], the fuzzy logic control [20], the predictive control
[21], and the backstepping control [22], have been reported in the literature. Such control schemes have
proven their superiority, in terms of output stability, tracking performances, and transient response [18].
Based on a comparative analysis conducted in [20], the performances of the backstepping approach were
praised over the SMC for the inverter. Accordingly, this paper associates an adaptive approach with the
conventional backstepping controller to further enhance its efficiency.
The layout of the rest of this paper is given as: section 2 presents the research method which deals
with the modeling of both power converters as well as the design process of the integral sliding mode and the
adaptive backstepping control approaches. Followed by a presentation and discussion of the obtained
simulation results in section 3. Finally, this paper ends with a conclusion.
2. RESEARCH METHOD
To accurately control the power transfer, two main requirements are needed. these latter are an
accurate mathematical model of both power converters, and a delicate design of the control schemes so as to
impose the required behavior on the converters. These requirements are addressed in the following sections.

Int J Elec & Comp Eng ISSN: 2088-8708 
Power transfer control within the framework of vehicle-to-house technology (Hicham Ben Sassi)
3819
2.1. Bidirectional DC-DC converter
Being that the V2H technology requires a two-way power transfer, the buck-boost converter in
Figure 2 is adopted. The operating mode of the converter is imposed by the power needs of the standalone
house and the EV battery state of charge (SoC) [23], [24]. When the PV solar panels production exceeds the
power needs of the house, and the EV is not fully charged, the converter lowers the voltage so as to charge
the EV battery, thus, functioning as a buck power converter. This energy can be used later to power the house
in case the PV production is insufficient due to bad weather. In such a scenario the converter elevates the
voltage delivered by the EV to equal that of DC bus, hence operating in boost mode. The obtained DC
voltage can then be converted to an AC voltage suitable to power the household equipment using the
appropriate DC-AC inverter.
Figure 2. 2sw buck-boost converter
Being that the adopted control schemes in this paper are all model-based. This section provides a
mathematical model of the converter in Figure 2 using the dynamic state-space equations which are derived
from analyzing the off-state and on-state of the transistors.
− Boost mode
𝑉𝑆𝑤1 = (1 − 𝑆𝑤1)𝑉𝑑𝑐 (1)
𝑑𝑖𝑏
𝑑𝑡
= −
𝑅𝐿𝑖𝑏
𝐿
+
𝑉𝑏
𝐿
−
𝑉𝑠𝑤1
𝐿
(2)
𝑑𝑖𝑏
𝑑𝑡
= −(1 − 𝑆𝑤1)
𝑉𝑑𝑐
𝐿
−
𝑅𝐿𝑖𝑏
𝐿
+
𝑉𝑏
𝐿
(3)
𝑑𝑉𝑑𝑐
𝑑𝑡
=
𝑖𝑑𝑐
𝐶
=
𝑖𝑏(1−𝑆1)
𝐶
(4)
− Buck mode
𝑉𝑆𝑤1 = 𝑆2𝑉𝑑𝑐 (5)
𝑑𝑖𝑏
𝑑𝑡
= −𝑆𝑤2
𝑉𝑑𝑐
𝐿
−
𝑅𝐿𝑖𝑏
𝐿
+
𝑉𝑏
𝐿
(6)
𝑑𝑉𝑑𝑐
𝑑𝑡
= 𝑆𝑤2
𝑖𝑏
𝐶
(7)
Since the converter operates in both buck and boost modes, an averaged state-space representation is developed
based on the equations presented above:
(𝑥̇1
𝑥̇2
) = (
𝑑𝑖𝑏
𝑑𝑡
𝑑𝑉𝑑𝑐
𝑑𝑡
) = (
−𝑅𝐿
𝐿
−
𝐾(1−𝑆𝑤1)+(1−𝐾)𝑆𝑤2
𝐿
𝐾(1−𝑆𝑤1)+(1−𝐾)𝑆𝑤2
𝐶
0
) (
𝑖𝑏
𝑉𝑑𝑐
) + (
1
𝐿
0
) 𝑉𝑏 + 𝑑 (8)

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Let 𝑆𝑊𝐺 = 𝐾(1 − 𝑆𝑤1) + (1 − 𝐾)𝑆𝑤2.
(𝑥̇1
𝑥̇2
) = (
𝑑𝑖𝑏
𝑑𝑡
𝑑𝑉𝑑𝑐
𝑑𝑡
) = (
−𝑅𝐿
𝐿
−
𝑆𝑊𝐺
𝐿
𝑆𝑊𝐺
𝐶
0
) (
𝑖𝑏
𝑉𝑑𝑐
) + (
1
𝐿
0
) 𝑉𝑏 + 𝑑 (9)
Since no model is perfect, the constrained uncertainties are represented by d in the state-space model. It is
chosen to take into consideration model parameter errors of 10% magnitude, including 𝑅𝐿, 𝐿 and 𝐶.
2.2. Integral sliding mode control
The ISMC is an enhanced version of the conventional SMC developed by Utkin [25]. This type of
controller produces switching control signals that force the system to stay on a specified sliding surface (S),
where the stability of the system is assured. In an attempt to eliminate the reaching phase of the conventional
SMC and thus enhance the response time of the controller, an integral term is incorporated into the
aforementioned sliding surface which resulted in the ISMC [26]. The design process of this latter is as:
- First, the switching function (S), often known as the integral sliding surface, is defined.
- Secondly, a control law that attracts the system state towards the sliding surface (S) is designed. This control
law must guarantee that the direction of motion is always towards S as well as the system’s stability [27].
The sliding surface used in this research is given in (10). The choice of S is based on the fact that the
exchanged power between the DC-bus and the EV is controlled via the charge/discharge current since the DC
bus voltage is maintained constate.
𝑆 = (𝑒) + ℾ ∫ 𝑒 𝑑𝑡
𝑡
0
(10)
𝑒 = 𝑥1 − 𝐼𝑏𝑟𝑒𝑓 (11)
where 𝑥1 is the EV battery’s current, 𝑒 is the mismatch between this latter and the reference value (𝐼𝑏𝑟𝑒𝑓), and ℾ
is a constant gain. The derivative of the sliding surface S is computed as presented in (13), so as to have access
to the control signal 𝑆𝑊𝐺.
𝑆̇ = 𝑥1
̇ + ℾ(𝑥1 − 𝐼𝑏𝑟𝑒𝑓) (12)
𝑆̇ = −𝑆𝑊𝐺
𝑉𝑑𝑐
𝐿
+ 𝑥1(ℾ −
𝑅𝐿
𝐿
) +
𝑉𝑏
𝐿
− 𝐾𝐼𝑏𝑟𝑒𝑓 (13)
Following the design of S, the second step is to develop a control law that forces the states of the
system to converge toward S while guaranteeing the system’s stability. As a result, the appropriate control law
that can satisfy these two demands is composed of two parts as presented in (14).
𝑢 = 𝑆𝑊𝐺 = 𝑢𝑒𝑞 + 𝑢𝑛 (14)
where 𝑢𝑒𝑞 is the equivalent control, which ensures the insensitivity of the feedback system to disturbances once
on the sliding surface. To accomplish this, 𝑢𝑒𝑞 is set so as to eliminates the impact of known parameters on the
converter’s performance. On the other hand, the nonlinear discontinuous control 𝑢𝑛 is devoted to cancel the
effects of uncertainties and external disturbances. Being that the equivalent control (𝑢𝑒𝑞) is only effective once
on the sliding surface, its value is computed as (15) and (16).
𝑆̇ = 0 ≪=≫ 𝑆̇ = −𝑢𝑒𝑞
𝑉𝑑𝑐
𝐿
+ 𝑥1 (ℾ −
𝑅𝐿
𝐿
) +
𝑉𝑏
𝐿
− ℾ𝐼𝑏𝑟𝑒𝑓 = 0 (15)
𝑢𝑒𝑞 =
𝐿
𝑉𝑑𝑐
(𝑥1 (ℾ −
𝑅𝑙
𝐿
) − ℾ𝐼𝑏𝑟𝑒𝑓 +
𝑉𝑏
𝐿
) (16)
The discontinuous control (𝑢𝑛) is set to always ensures a sliding motion on the predefined dynamics
(S) in spite of uncertainties, and by doing so, it secures the controller stability. As a result, the expression of the
control 𝑢𝑛 is derived using the Lyapunov stability theory as presented in (17) and (18).
𝑉 =
1
2
𝑆2
(17)

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𝑉̇ = 𝑆̇𝑆 = 𝑆(−𝑢𝑒𝑞
𝑉𝑑𝑐
𝐿
− 𝑢𝑛
𝑉𝑑𝑐
𝐿
+ (ℾ −
𝑅𝐿
𝐿
) 𝑥1 +
𝑉𝑏
𝐿
− ℾ𝐼𝑏𝑟𝑒𝑓 + 𝑑) (18)
For a controller to be asymptotically stable 𝑉̇ must be negative, however, 𝑉̇ < −𝐾|𝑆| is required to
force a finite asymptotic convergence. Based on this new constraint as well as the expression of 𝑢𝑒𝑞 in (16),
𝑢𝑛 can be derived from (18) as (19).
𝑉̇ = 𝑆 (−𝑢𝑛
𝑉𝑑𝑐
𝐿
+ 𝑑) (19)
where
𝑢𝑛 = 𝐾𝑠𝑖𝑔𝑛(𝑆) (20)
𝑉̇ < 0 ≪=≫ 𝐾 > 𝑑
𝐿
𝑉𝑑𝑐
(21)
The output control signal of the ISMC is designed by joining the two control signals 𝑢𝑛 and 𝑢𝑒𝑞.
𝑢12 =
𝐿
𝑉𝑑𝑐
((ℾ −
𝑅𝐿
𝐿
) 𝑥1 +
𝑉𝑏
𝐿
− ℾ𝐼𝑏𝑟𝑒𝑓) + 𝐾𝑠𝑖𝑔𝑛(𝑆) (22)
2.3. Bidirectional DC-AC inverter control
The power inverter investigated in this section is the full bridge illustrated in Figure 3. It consists
of 4 controllable MOSFET transistors, associated with 4 diodes enabling the inverter to operate in a
bidirectional power flow. Alongside a low-pass harmonic filter LC that smooth’s the output voltage, resulting
in a sinusoidal waveform, thus, enhancing the power quality. Furthermore, the LC filter eliminates the
switching frequency and protects the inverter from the transients [28]. The inverter supplies an AC load
representing either, an electrical grid or the electric equipment in a standalone house.
Figure 3. Full bridge inverter
The transforming process of DC to AC is achieved by applying a control signal to the gates of the
inverter. Depending on the activation states of each transistor, the output voltage 𝑉1 alternates between
+𝑉𝐷𝐶, 0, and −𝑉𝐷𝐶. The combination of all states results in a rectangular waveform 𝑉1 with an amplitude of
|𝑉𝐷𝐶|.
Most power inverters are associated with controllers that enforce the desired performances, by
acting on their switching transistors. As a result, in this paper, the full-bridge inverter is controlled with
PWM based on a backstepping control scheme. Since backstepping is a model-based control strategy, a
mathematical model of the power inverter is constructed as:
By applying the Kirchhoff’s current law (KCL) and Kirchhoff’s voltage law (KVL), the voltage
across the capacitor C as well as the inductance’s current, evolve following (23) and (24) respectively.

 ISSN: 2088-8708
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𝐶
𝑑𝑉𝐶
𝑑𝑡
= 𝐶
𝑑𝑉2
𝑑𝑡
= 𝐼𝐿 − 𝐼𝑔 (23)
𝐿𝐹
𝑑𝐼𝐿
𝑑𝑡
= 𝑉1 − 𝑉2 (24)
The output voltage 𝑉1 (prior to the LC filter) is expressed as a function of the switching signal as (25).
𝑉1 = 𝑉𝑑𝑐(𝑆ℎ − 𝑆𝑙) (25)
where 𝑆ℎ = 𝑄1 ∗ 𝑄4 and 𝑆𝑙 = 𝑄2 ∗ 𝑄3.
𝐿𝐹
𝑑𝐼𝐿
𝑑𝑡
= 𝑉𝑑𝑐(𝑆ℎ − 𝑆𝑙) − 𝑉2 (26)
In control theory, the parameter to be controlled must appear in the state space representation of the
plant, as a result, the output voltage across the capacitor 𝑉2 as well as the inductor’s current 𝐼𝐿 are selected as
state variables 𝑋1 and 𝑋2 respectively.
𝑥̇1 =
𝑥2
𝐶
−
𝐼𝑔
𝐶
(27)
𝑥̇2 =
𝑉𝑑𝑐𝑢
𝐿𝐹
−
𝑥1
𝐿𝐹
(28)
where the control law 𝑢 is defined as (29) and (30).
𝑢 = (𝑆ℎ − 𝑆𝑙) (29)
[
𝑥̇1
𝑥̇2
] = [
0
1
𝐶
1
𝐿𝐹
0
] [
𝑥1
𝑥2
] + [
0
𝑉𝑑𝑐
𝐿𝐹
] 𝑢 + [
1
𝐶
0
] 𝐼𝑔 (30)
2.4. The adaptive backstepping control approach
Backstepping is a recursive control approach, applied to complex nonlinear systems with triangular
state-space representation. In such systems, the control law appears in the nth state, and the desired state can
only be controlled via another state of the plant. Backstepping is based on the decomposition of a high-order
system into a set of reduced-order subsystems easy to control. The output of each subsystem is injected into
the following subsystem as a virtual control law. The global control law is designed using the Lyapunov
stability theory.
For the adaptive backstepping approach, the controller gains are recursively adjusted depending on
the inverter’s behavior. Thus, enhancing the accuracy of the conventional controller. Generally, backstepping
is adopted for systems where the desired state can only be controlled via another state of the plant, making it
suitable for the inverter, since the output voltage can only be controlled via the output current. The
motivation of the control is to establish a sinusoidal output, that is coordinated with the voltage level and
frequency of the grid and the electrical equipment of the stand-alone house.
The design process of the backstepping begins by defining the tracking dynamics. Accordingly, the
mismatch between the output voltage of the inverter and the reference voltage is defined as (31).
𝑒𝑏1 = 𝑉2𝑟𝑒𝑓 − 𝑥1 (31)
The Lyapunov function that can guarantee the subsystem’s stability while designing a virtual control law that
nullifies 𝑒𝑏1 is as:
𝑉1 =
1
2
𝑒𝑏1
2
(32)
Similar to the SMC, the Lyapunov stability theory states that for a positive definite function 𝑉1, the
subsystem is asymptotically stable if the derivative of 𝑉1 is strictly negative, as a result:
𝑉̇1 < 0 ↔ 𝑒𝑏1𝑒̇𝑏1 < 0 (34)

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However, for finite-time convergence, zero is replaced with a small quantity.
𝑒̇𝑏1 = 𝑉̇2𝑟𝑒𝑓 − 𝑥̇1 (35)
𝑒̇𝑏1 = 𝑉̇2𝑟𝑒𝑓 −
𝑥2
𝐶
+
𝐼𝑔
𝐶
(36)
𝑉̇1 = 𝑒𝑏1 (𝑉̇2𝑟𝑒𝑓 −
𝑥2
𝐶
+
𝐼𝑔
𝐶
) = −𝐾𝑏1𝑒𝑏1
2
(37)
The virtual control 𝑥2𝑑𝑒𝑠 that substantiates (34) and (37) is then constructed as (38) and (39).
𝑒𝑏1 (𝑉̇2𝑟𝑒𝑓 −
𝑥2𝑑𝑒𝑠
𝐶
+
𝐼𝑔
𝐶
) = −𝐾𝑏1𝑒𝑏1
2
(38)
𝑥2𝑑𝑒𝑠 = 𝐶 (𝑉̇2𝑟𝑒𝑓 +
1
𝐶
𝐼𝑔 + 𝐾𝑏1𝑒𝑏1) (39)
The second step is to form the appropriate control law 𝑢 that ensures the convergence of 𝑥2 towards 𝑥2𝑑𝑒𝑠.
To this end, the mismatch 𝑒𝑏2 is defined as (40) and (41).
𝑒𝑏2 = 𝑥2𝑑𝑒𝑠 − 𝑥2 (40)
𝑥2 = 𝑥2𝑑𝑒𝑠 − 𝑒𝑏2 (41)
Replacing 𝑥2 in (37) by its expression in (41) as well as 𝑥2𝑑𝑒𝑠 by its expression in (39) yields:
𝑉̇1 = 𝑒𝑏1𝑒̇𝑏1 = 𝑒𝑏1 (𝑉̇2𝑟𝑒𝑓 +
𝑒𝑏2
𝐶
−
𝑥2𝑑𝑒𝑠
𝐶
+
𝐼𝑔
𝐶
) (42)
𝑉̇1 = 𝑒𝑏1𝑒̇𝑏1 = 𝑒𝑏1 (𝑉̇2𝑟𝑒𝑓 +
𝑒𝑏2
𝐶
− 𝑉̇2𝑟𝑒𝑓 −
𝐼𝑔
𝐶
− 𝐾𝑏1𝑒𝑏1 +
𝐼𝑔
𝐶
) (43)
𝑒̇𝑏1 =
𝑒𝑏2
𝐶
− 𝐾𝑏1𝑒𝑏1 (44)
The global Lyapunov function 𝑉𝐺 that ensures the stability of the entire system is defined as (45) and (46).
𝑉𝐺 = 𝑉1 + 𝑉2 =
1
2
𝑒𝑏1
2
+
1
2
𝑒𝑏2
2
(45)
𝑉̇𝐺 = 𝑉̇1 + 𝑉̇2 = 𝑒𝑏1𝑒̇𝑏1 + 𝑒𝑏2𝑒̇𝑏2 (46)
where
𝑒̇𝑏2 = 𝑥̇2𝑑𝑒𝑠 −
𝑉𝑑𝑐𝑢
𝐿𝐹
+
𝑥1
𝐿𝐹
(47)
𝑥̇2𝑑𝑒𝑠 = 𝐶 (𝑉̈2𝑟𝑒𝑓 +
1
𝐶
𝐼̇𝑔 + 𝐾𝑏1𝑒̇𝑏1) (48)
𝑉̇𝐺 = 𝑒𝑏1𝑒̇𝑏1 + 𝑒𝑏2[𝐶 (𝑉̈2𝑟𝑒𝑓 +
1
𝐶
𝐼̇𝑔 + 𝐾𝑏1𝑒̇𝑏1) −
𝑉𝑑𝑐𝑢
𝐿𝐹
+
𝑥1
𝐿𝐹
] (49)
The control law 𝑢 that is fed to the PWM generator is derived by setting 𝑉̇𝐺 as in (50), and substituting 𝑒̇𝑏1 by
its expression in (44).
𝑉̇𝐺 = −𝐾𝑏1𝑒𝑏1
2
− 𝐾𝑏2𝑒𝑏2
2
(50)
1
𝐶
𝑒𝑏1 + 𝐶 (𝑉̈2𝑟𝑒𝑓 +
1
𝐶
𝐼̇𝑔 + 𝐾𝑏1𝑒̇𝑏1) −
𝑉𝑑𝑐𝑢
𝐿𝐹
+
𝑥1
𝐿𝐹
= −𝐾𝑏2𝑒𝑏2 (51)
𝑢 =
𝐿𝐹
𝑉𝑑𝑐
(
1
𝐶
𝑒𝑏1 + 𝐼̇𝑔 + 𝐶𝐾𝑏1𝑒̇𝑏1 + 𝐶𝑉̈2𝑟𝑒𝑓 +
1
𝐿𝐹
𝑥1 + 𝐾𝑏2𝑒𝑏2) (52)

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By setting 𝐾𝑏1 and 𝐾𝑏2 as positive values, the tracking error of both states is forced to zero.
Henceforward, the inverter produces an output voltage identical to the reference. To avoid the
time-consuming process of searching for the exact values of the constants gains 𝐾𝑏1 and 𝐾𝑏2, an adaptive
approach is considered. The new proposed control law containing the adaptive gains is given in (53).
𝑢 =
𝐿𝐹
𝑉𝑑𝑐
(
1
𝐶
𝑒𝑏1 + 𝐼̇𝑔 + 𝐶𝐾
̂̇
𝑏1𝑒̇𝑏1 + 𝐶𝑉̈2𝑟𝑒𝑓 +
1
𝐿𝐹
𝑥1 + 𝐾
̂̇
𝑏2𝑒𝑏2) (53)
𝐾
̂̇
𝑏𝑖 = {
𝜇𝑖𝑒𝑏𝑖
2
𝑖𝑓 𝑒𝑏𝑖
> λ𝑖
0 𝑜𝑡ℎ𝑒𝑟𝑤𝑖𝑠𝑒
𝑓𝑜𝑟 𝑖 = 1 𝑎𝑛𝑑 2 (54)
The expression of the adaptive gains is derived using the Lyapunov stability theory. In this regard,
the new Lyapunov function becomes.
𝑉𝐴𝑑 =
1
2
𝑒𝑏1
2
+
1
2
𝑒𝑏2
2
+
𝐾
̃1
2
2𝜇1
+
𝐾
̃2
2
2𝜇2
(55)
{
𝐾
̃1 = 𝐾𝑏1 − 𝐾
̂𝑏1
𝐾
̃2 = 𝐾𝑏2 − 𝐾
̂𝑏2
(56)
where 𝐾
̃1 and 𝐾
̃2 are the mismatch between the real and estimated values of the backstepping gains. Seeing
that 𝐾𝑏1and 𝐾𝑏2 have a slow variation rate, they can be considered constant in a small-time interval. Thus, the
derivative of 𝑉𝐴𝑑 can be expressed as (57).
𝑉̇𝐴𝑑 = −𝐾
̂𝑏1𝑒𝑏1
2
− 𝐾
̂𝑏2𝑒𝑏2
2
−
𝐾
̃1(𝐾
̂̇
𝑏1)
𝜇1
−
𝐾
̃2(𝐾
̂̇
𝑏2)
𝜇2
(57)
At this stage the estimated value of 𝐾
̂𝑏1 and 𝐾
̂𝑏2 are not yet known, as a result, 𝐾
̂𝑏1𝑒𝑏1
2
and 𝐾
̂𝑏2𝑒𝑏2
2
cannot be declared positive. To overcome this, 𝐾
̂𝑏1and 𝐾
̂𝑏2 are substituted in (57) by their expressions in
(58):
{
𝐾
̂𝑏1 = 𝐾𝑏1 − 𝐾
̃1
𝐾
̂𝑏2 = 𝐾𝑏2 − 𝐾
̃2
(58)
𝑉̇𝐴𝑑 = −𝐾𝑏1𝑒𝑏1
2
2
− 𝐾
̃1(−𝑒𝑏1
2
+
𝐾
̂̇
𝑏1
𝜇1
) − 𝐾
̃2(−𝑒𝑏2
2
+
𝐾
̂̇
𝑏2
𝜇2
) (59)
By replacing 𝐾
̂̇
𝑏1and 𝐾
̂̇
𝑏2 by their corresponding expression in (54), the derivative of the Lyapunov function
𝑉𝐴𝑑 becomes negative. Henceforward, the system is stable.
𝑉̇𝐴𝑑 = −𝐾𝑏1𝑒𝑏1
2
2
(60)
3. SIMULATION AND RESULTS DISCUSSION
This section aims to evaluate the performances of the adaptive backstepping control strategy applied
to the power inverter. This includes the convergence time, voltage, and frequency stability, as well as the
total harmonic distortion (THD) of the output voltage. To this end, the MATLAB/Simulink model in Figure 4
is constructed. It consists of a standalone house with a PV plant and battery storage system as well as a
bidirectional EV charging station. For this study, the output power of both the PV plant and battery storage
system is considered to be zero. Accordingly, the power requirements of the house must be provided by the
EV using the aforementioned power converter and control schemes. The electrical and control parameters
adopted in this section are listed in Table 1.
Given that the voltage level and frequency required by most house equipment are 220 V and 50 Hz
respectively, the reference voltage profile in Figure 5 is adopted in this paper. It is a sinusoidal waveform
with a voltage level of 220 V and 50 Hz frequency. Initially, this profile is used to investigate the
performances of the adopted control schemes in supplying a stable load of 6 KVA. The obtained simulation
results are illustrated in Figures 6 and 7.

3825
Figure 4. Simulation setup
Table 1. Simulation parameters
Parameter Value Parameter Value
L 5 mH V2 220 V
C 100 µF Load1 2 KW
C-bus 12000 µF Load2 4 KW
f 50 Hz Load3 6 KW
𝐹𝑠𝑤 20 KHz μ1 100
𝑉𝐷𝐶 500 V μ2 100
EV battery capacity 40 kWh λ1,2,3 3
In Figure 6, the inverter’s output voltage using the Backstepping controller is compared to that of
the same inverter controlled by the conventional proportional-integral-derivative (PID). Based on the
obtained results it is clear that the backstepping voltage represented by the solid blue line converges towards
the reference voltage given by the red plus pattern in just 10−3
(𝑠). Which substantiates the tracking
performances of the adopted control scheme. Furthermore, compared to the PID voltage given in the dotted
green line, the backstepping voltage is clearly more stable since it does not present any oscillations. It rather
maintains a sinusoidal form of 50 Hz frequency and 220 V amplitude throughout the entirety of the
simulations, which is crucial for the household electrical equipment. With regards to the quality of the output
power, Figure 7 shows that the power provided to the house under a constant load is stable with no
fluctuations, which is a critical requirement for power systems especially if there is no electric grid to
smoothen the power.
Being that the daily power demand of most houses varies depending on the number of connected
equipment, in this section, the robustness of the adopted control schemes is evaluated under a load variation
scenario. For this purpose, the power profile in Figure 8 is adopted. This latter simulates instantaneous
transitions between three load values; 𝑃1 = 2 𝐾𝑊, 𝑃2 = 4 𝐾𝑊, and 𝑃3 = 6 𝐾𝑊. The obtained results are
illustrated in Figures 9 and 10.
As illustrated, in Figures 9 and 10, the sequence of sudden variations in power demand has no effect
on the performance of the controllers. In this regard, Figure 9 shows that the output voltage’s amplitude and
frequency are successfully maintained at 220 V and 50 Hz respectively regardless of the load variations. This
is showcased in the zoomed area of Figure 9. Concurrently, the amplitude of the electrical current in
Figure 10, varies in accordance with the load to satisfy the power requirement, while maintaining a perfect
sinusoidal form of 50 Hz frequency as shown in the zoomed area. The quality of the inverter’s output signals

 ISSN: 2088-8708
3826
is further validated by a frequency analysis conducted on the voltage supplied to the loads as presented in
Figure 11. The analysis yielded a THD of about 0.25%, which is below the acceptable range (5%) according
to the standard of IEEE-519 (IEEE 519 working group, 1992).
Figure 5. Reference voltage signal Figure 6. The output voltage of the power inverter
Figure 7. Output power provided to the house Figure 8. The output power of the inverter
Figure 9. The output voltage of the inverter Figure 10. The load’s current variation
Figure 11. Analysis of THD of the output voltage

3827
4. CONCLUSION
In this paper, the power transfer between an EV and an isolated house was controlled using an
adaptive backstepping approach and an integral sliding mode scheme within the framework of
vehicle-to-house technology. The robustness of both controllers was investigated under both fixed and
variable load scenarios and resulted in satisfactory performances. In this regard, the output signal of the
inverter follows with great accuracy the reference signal, resulting in a perfect sinusoidal waveform. This is
supported by the frequency analysis of the output signal, which yielded a THD value of 0.25% total harmonic
distortion. As a result, the authors recommend these two control strategies for vehicle-to-house technology.
ACKNOWLEDGEMENTS
The authors would like to thank the members of the Laboratory of Intelligent Systems,
Georesources and Renewable Energies (LISGRE), for their help and support.
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BIOGRAPHIES OF AUTHORS
Hicham Ben Sassi is professor at the Private University of Fez, Morocco. He
received his Ph.D in Electrical Engineering from the University of Sidi Mohammed Ben
Abdellah, Faculty of Science and Technologies, Morocco. His research interests include,
electric vehicles, batteries, renewable energy, power electronics and artificial intelligence. He
can be contacted at email: hicham.1bensassi@gmail.com.
Yahia Mazzi received the M.S. degree in Electronic, Signals, and Automated
Systems from the Faculty of Sciences and Technologies of Fez, Sidi Mohamed Ben Abdellah
University, Morocco, in 2018. He is currently pursuing a Ph.D. degree in Energy Management
for Electric Vehicles at the Laboratory of Intelligent Systems, Georesources and Renewable
Energies (LISGRE ISGRE). His research interests include electric vehicles, batteries, battery
management system, electric vehicle motor drive control, renewable energies, power
electronics, embedded systems, and the application of artificial intelligence in power system
and EV battery management system. He can be contacted at: yahia.mazzi@usmba.ac.ma.
Fatima Errahimi is teacher and researcher at the Faculty of Sciences and
Technologies in Sidi Mohamed Ben Abedellah University of Fez. She got Ph.D degree on
Automatic Control System and robotics in 2004. Her special fields of interest include the
integration of renewable energy sources in building energy management, optimization control
for demand side units in households and smart grid. She participated in many research projects
among which the IRESEN one on low cost CPV in Morocco. She supervised many Ph.D thesis
and several post graduate students. She can be contacted at: fatima.errahimi@usmba.ac.ma.
Najia Es-Sbai received her Ph.D. degree from Pau University (France) in 1993.
She is a Professor in the Electric Engineering Department at the Faculty of Science and
Technology, University of Sidi Mohamed Ben Abdellah (USMBA-Fez Morocco), since 1995.
She completed her Ph.D. (doctorat d’état) at USMBA in 2002. She was deputy head of the
electrical engineering department at the Faculty of Science and Technology of Fez for the
period 2010-2013. Her main research concerns area of nanostructures. In recent years, she
focused on image processing, especially emotions detection and renewable energy. She is
member and Deputy Director of the Laboratory of Intelligent Systems, Georesources and
Renewable Energies (LISGRE) since 2014 and she is concerning in supervising many Ph.D.
thesis. Theses concerning the management and optimization of energy flows in a smart grid
DC isolated, intelligent inverter, DC-DC converters for energy optimization, and facial
expression emotion detection. She can be contacted at email: najia.essbai@usmba.ac.ma.

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