III. BESS SIZING METHODในบทความนี้ไ

III. BESS SIZING METHOD
ในบทความนี้ได้นำเสนอการกำหนดขนาดของ BESS ด้วยเทคนิคการ
สร้างเส้นอ้างอิงกำลังไฟฟ้า(reference power line technique) ร่วมกับการสร้าง
เส้นอ้างอิงกำลังไฟฟ้าด้วยวิธีการปรับเรียบแบบเลขชี้กำลังเชิงเส้น (Linear
Exponential Smoothing, LES) ซึ่งเป็นวิธีที่มีความเหมาะสมในการกำหนด
ขนาดของ BESS ที่ใช้งานร่วมกับ PV generations และมีประสิทธิภาพที่ดีใน
การควบคุมขนาดพิกัดของ BESS เมื่อเทียบกับวิธีดั้งเดิมคือ Simple Moving
Average (SMA), Exponential Moving Average (EMA) และ First-order Low
Pass Filter (LPF) [5]
Fig. 3. Modeling the power fluctuation migrating of PV generation with
BESS
A. การกำหนดขนาดของ BESS ด้วยเทคนิคการสร้างเส้นอ้างอิงกำลังไฟฟ้า [5]
(BESS rating evaluation by a reference power line technique)
เมื่อพิจารณาจากภาพที่ 3 สามารถแสดงความสัมพันธ์ดัง (1) ถึง
(5) ตามลำดับ
Pref = Ppv + Pbess (1)
, ( ) ( )- ( ) bess ref ref pv P t = P t P t (2)
, max ( ) ( ) bess rated ref pv P = P t − P t (3)
1
0
, ( ) ( )
t
bess bess ref
t
E t = ∫ P t dt (4)
, max( ( )) min( ( )) bess rated bess bess E = E t − E t (5)
Where ref P is the Power of reference power line, pv P is the Power of
PV generations, bess P is access power from BESS, , ( ) bess ref P tis access
power from BESS at t , bess,rated P is the Power Rated of BESS, ( ) bess E t
is access energy at t and bess,rated E is the Energy Rated of BESS
B. การสร้างเส้นอ้างอิงกำลังไฟฟ้าด้วยวิธีการปรับเรียบแบบเลขชี้กำลังเชิงเส้น [6]
(reference power line creation by linear exponential smoothing)
โดยมีความสัมพันธ์ที่สำคัญดัง (8) ถึง (12)
(2 ) - t t t a = F′ F′′ (8)
( - )
t (1 - ) t t b α F F
α
⎡ ⎤
⎢ ⎥
⎢ ⎥
⎢⎣ ⎥⎦
= ′ ′′ (9)
- 1 (1- ) t t t F′=α X + α F′ (10)
- 1 (1- ) t t t F′′=α F′+ α F′′ (11)
t t t F = a +b (12)
Where t F is the smoothing data value at t , t X is the data value at t ,
α is a smoothing factor, t F′ and t F′′ are first and second smoothing data
value respectively, t a is intercept and t b is slope.
IV. SIMULATION RESULTS
A. การจ่ายไฟในสภาวะปกติ (NORMAL DISPATCH)
จากผลการจำลองการส่งจ่ายไฟฟ้าในสภาวะปกติ(normal dispatch) จาก
สถานีไฟฟ้า(substation) ฮอด ฟีดเดอร์ที่ 9(feeder No.9) ถึง สถานีไฟฟ้า
(substation) อ.แม่สะเรียง เป็นระยะทาง 106 km. โดยมี PV generation
เชื่อมต่อกับระบบโครงข่ายไฟฟ้า(power grid) พบว่าก่อนการปรับปรุง
คุณภาพกำลังไฟฟ้า(power quality) ของ PV generation ระดับแรงดันต่ำสุด
(minimum RMS voltage level) ที่จุดเชื่อมต่อ(point of common coupling) คือ
0.905 pu ซึ่งเกินค่า Voltage fluctuation is definite as a series of voltage
amplitude fluctuation which changes between 0.95 pu and 1.05 pu in
medium voltage (MV) system. และการเปลี่ยนแปลงของแรงดันสูงสุด
(maximum rapid voltage changes) 9.893% โดยปกติต้องไม่เกินกว่า 4% [7]
แสดงดังภาพที่ 4 ถึง 6 หลังจากการปรับปรุงคุณภาพกำลังไฟฟ้าของ PV
generation ให้เป็นไปตามเส้นอ้างอิงกำลังไฟฟ้า(reference power line) ที่ PVLES05
ถึง PV-LES30 พบว่าการเปลี่ยนแปลงของแรงดัน(rapid voltage
changes) ที่จุดเชื่อมต่อ(point of common coupling) ลดลงต่ำกว่า 4% จากนั้น
เมื่อพิจารณาระดับแรงดัน(voltage level) ที่จุดเชื่อมต่อ(point of common
coupling) พบว่าการชดเชยความผันผวนของกำลังไฟฟ้า(power fluctuation)
ให้เป็นไปตามเส้นอ้างอิงกำลังไฟฟ้า PV-LES20, PV-LES25 และ PV-LES30
เท่านั้นที่ให้ผลของระดับแรงดัน(voltage level) ที่จุดเชื่อมต่ออยู่ในเกณฑ์
มาตรฐานกำหนด แสดงดังภาพที่ 8 ในการศึกษานี้จึงเลือกใช้เส้นอ้างอิง
กำลังไฟฟ้า PV-LES25 ประกอบการประเมินขนาดพิกัดของ BESS เนื่องจาก
ผลการเปลี่ยนแปลงของแรงดัน(rapid voltage changes) และระดับของแรงดัน
(voltage level) ที่จุดเชื่อมต่อเป็นไปตามมาตรฐานกำหนด รวมถึงมีขนาดพิกัด
(rated) ของระบบเก็บพลังงาน(energy storage system) ที่ต่ำสุดและเพียงพอ
กับความต้องการปรับปรุงคุณภาพไฟฟ้า(power quality) โดยมีพิกัดพลังงาน
(energy rated) และพิกัดกำลังไฟฟ้า(power rated) 191.525 kJ และ 3,349.4
kW ตามลำดับ แสดงดังตารางที่ 1
Fig. 4. The results of rapid voltage changes at point of common coupling
ก่อนและหลังการปรับปรุงคุณภาพกำลังไฟฟ้า (power quality) ของ PV
generation ให้เป็นไปตามเส้นอ้างอิงกำลังไฟฟ้า (reference power line) PVLES05
Fig. 5. The results of rapid voltage changes at point of common coupling
ก่อนและหลังการปรับปรุงคุณภาพกำลังไฟฟ้า (power quality) ของ PV
generation ให้เป็นไปตามเส้นอ้างอิงกำลังไฟฟ้า (reference power line) PVLES15
Fig. 6. The results of rapid voltage changes at point of common coupling
ก่อนและหลังการปรับปรุงคุณภาพกำลังไฟฟ้า (power quality) ของ PV
generation ให้เป็นไปตามเส้นอ้างอิงกำลังไฟฟ้า (reference power line) PVLES25
600 650 700 750 800 850 900 950
2
4
6
8
10
min
% Δ V
%ΔV of PV
%ΔV of PV-LES05
500 550 600 650 700 750 800 850 900 950
2
4
6
8
10
% Δ V
min
%ΔV of PV
%ΔV of PV-LES15
500 550 600 650 700 750 800 850 900 950
2
4
6
8
10
% Δ V
min
%ΔV of PV
%ΔV of PV-LES25
Fig. 7. การเปลี่ยนแปลงของกำลังไฟฟ้า(power profile) ระหว่างกำลังไฟฟ้า
(real power) ที่ผลิตได้จาก PV generation ที่เวลาใดๆและเส้นอ้างอิง
กำลังไฟฟ้า(reference power line) PV-LES25
จากภาพที่ 7 เมื่อพิจารณาการใช้เส้นอ้างอิงกำลังไฟฟ้า(reference power
line) PV-LES25 สำหรับการประเมินขนาดพิกัดของระบบเก็บพลังงาน
(energy storage system) เพื่อปรับปรุงคุณภาพกำลังไฟฟ้า(power quality) ที่
ส่งจ่ายจาก PV generation จะเห็นได้ว่าการปรับปรุงคุณภาพกำลังไฟฟ้าที่ผลิต
ได้จาก PV generation ให้เป็นไปตามเส้นอ้างอิงกำลังไฟฟ้า PV-LES25 เป็น
ผลทำให้คุณภาพไฟฟ้าที่จุดเชื่อมต่อ(point of common coupling) ได้รับการ
ปรับปรุง เนื่องจากความผันผวนของกำลังไฟฟ้า(power fluctuation) ที่ผลิตได้
จาก PV generationได้รับการบรรเทาลง
Fig. 8. the results of voltage level at point of common coupling ก่อนและ
หลังการปรับปรุงคุณภาพกำลังไฟฟ้าให้เป็นไปตามเส้นอ้างอิงกำลังไฟฟ้า
(reference power line) PV-LES05 ถึง PV-LES30 ตามลำดับ (in pu)
TABLE I
SUMMARY OF NORMAL DISPATCH
PCC %ΔV
MAX
VL-L (pu)
MIN
BESS Sizing
E rated (kJ) P rated (kW)
PV profile 9.893 0.905 - -
PV-LES05 3.216 0.931 76.229 1,386.9
PV-LES10 1.313 0.937 94.527 2,709.2
PV-LES15 0.876 0.946 129.488 3,135.9
PV-LES20 0.651 0.950 156.328 3,293.0
PV-LES25 0.516 0.952 191.525 3,349.4
PV-LES30 0.427 0.953 236.569 3,363.9
TABLE II
SUMMARY OF ISLANDING DISPATCH 1
PCC %ΔV
MAX
VL-L (pu)
MIN
BESS Sizing
E rated (kJ) P rated (kW)
PV profile 0.359 0.996 - -
TABLE III
SUMMARY OF ISLANDING DISPATCH 2
PCC %ΔV
MAX
VL-L (pu)
MIN
BESS Sizing
E rated (kJ) P rated (kW)
PV profile 53.918 0.659 - -
PV-LES30 1.034 0.944 236.569 3,363.9
PV-LES35 0.892 0.948 292.728 3,360.5
PV-LES40 0.784 0.952 350.700 3,350.4
PV-LES45 0.698 0.956 405.701 3,338.8
PV-LES50 0.629 0.958 474.786 3,328.5
400 500 600 700 800 900 1000 1100 1200
0
1
2
3
4
min
MW
PV profile
PV profile(LES25)
0.89
0.9
0.91
0.92
0.93
0.94
0.95
0.96
0.97
PV
PVLES05
PVLES10
PVLES15
PVLES20
PVLES25
PVLES30 Case 1
Case 2
Case 3
Case 4
Fig. 9. the results of voltage level at point of common coupling ก่อนและ
หลังการปรับปรุงคุณภาพของกำลังไฟฟ้าให้เป็นไปตามเส้นอ้างอิงกำลังไฟฟ้า
(reference power line) PV-LES30 ถึง PV-LES50 ตามลำดับ (in pu)
B. การจ่ายไฟในสภาวะแยกตัวอิสระ (ISLANDING DISPATCH)
เมื่อมีการจัดการโหลด(load) เป็นไปอย่างสมดุลยระหว่างความต้องการ
พลังงาน(energy demand) และCapacity of Diesel generator ทำให้ผลการ
เปลี่ยนแปลงแรงดัน(rapid voltage changes) และระดับของแรงดัน(voltage
level) ที่จุดเชื่อมต่อ(point of common coupling) เป็นไปตามเกณฑ์มาตรฐาน
กำหนด แม้ว่าจะมีการส่งจ่ายกำลังไฟฟ้าจาก PV generation ก็ตาม
(,Although the transmission power of PV generation.) แสดง
ดังตารางที่ 2 ในกรณีนี้ไม่มีความจำเป็นต้องปรับปรุงคุณภาพกำลังไฟฟ้าของ
PV generation เนื่องจากความสมดุลยของโหลด(load) และกำลังการผลิต
(generation) รวมถึงตำแหน่งติดตั้งของ Diesel generator ที่อยู่ใกล้กับโหลด
(load)

ผลลัพธ์ (อังกฤษ) 1:

iii. bess sizing method
in this article was presented to determine the size of the bess techniques
generate the reference voltage (reference power line technique), together with the creation
reference line power with a smooth exponential linear. (linear
exponential smoothing, les), a method that is appropriate in determining
the size of bess compatible with pv generations and have good performance in
size control coordinates bess compared to the traditional method is simple moving
average (. sma),exponential moving average (ema) and first-order low
pass filter (lpf) [5]
fig. 3. modeling the power fluctuation migrating of pv generation with
bess
a. provide the size of the bess technique to build a reference line. power [5]
(bess rating evaluation by a reference power line technique)
.Considering Figure 3, can show such a relationship (1) to
(5), respectively
pref = ppv pbess (1)
, () () - () bess ref ref pv pt = ptpt (2)
,. max () () bess rated ref pv p = pt - pt (3)
1
0
, () ()
t
bess bess ref
t
et = ∫ pt dt (4)
, max ((). ) min (()) bess rated bess bess e = et - et (5)
.where ref p is the power of reference power line, pv p is the power of
pv generations, bess p is access power from bess,, () bess ref p tis access
power from bess at t, bess, rated p is the. power rated of bess, () bess et
is access energy at t and bess, rated e is the energy rated of bess
b.To generate the reference voltage with a linear exponential smoothing model. [6]
(reference power line creation by linear exponential smoothing)
, with the key relationships (8) to (12)
(2) - ttta = f 'f'' (8)
(-)
t. (1 -) ttb α ff
α
⎡ ⎤
⎢ ⎥
⎢ ⎥
⎢ ⎣ ⎥ ⎦
= ''' (9)
.- 1 (1 -) tttf '= α x α f' (10)
- 1 (1 -) tttf'' = α f 'α f'' (11)
tttf = ab (12)
where tf is the. smoothing data value at t, tx is the data value at t,
α is a smoothing factor, tf 'and tf'' are first and second smoothing data
value respectively, ta is intercept and tb is slope.
iv. simulation results.
a., the power supply in normal conditions (normal dispatch)
.Simulation results of power supply in normal conditions (normal dispatch) of
power station (substation) Hod feeds rider 9 (feeder no.9) to ele
(substation), A. Mae, a distance of 106. km. was pv generation
.Connected to the electricity network (power grid) found that before the update
power quality (power quality) of the pv generation is the lowest pressure
(minimum rms voltage level) point (point of common coupling) is.
0.905 pu, which exceed the voltage fluctuation is definite as a series of voltage
.amplitude fluctuation which changes between 0.95 pu and 1.05 pu in
medium voltage (mv) system., and changes the maximum voltage
(maximum rapid voltage changes) 9.893%, usually not more than 4% [7]
are shown in Fig. 4 to 6 after improving power quality of pv
.generation according to the reference voltage (reference power line) to the pvles05
pv-les30 found that the change of pressure (rapid. voltage
changes) point (point of common coupling) is lower than 4%, then
.Considering the voltage (voltage level) point (point of common
coupling) found that compensation for power fluctuations (power. fluctuation)
according to the reference line power pv-les20, pv-les25 and pv-les30
.Only the results of the voltage (voltage level) at this juncture in the draft standard
. See Figure 8 in this study chose to use the reference line
pv-les25 the power gauge coordinates bess because
.The change of pressure (rapid voltage changes) and the level of pressure
(voltage level) to meet the standards set point. The coordinates are
(rated) of energy storage (energy storage system), the minimum and sufficient
.To improve power quality (power quality) by the coordinates energy
(energy rated) and rated power (power rated) 191.525 kj and 3,349.4
kw, respectively, are shown in Table 1
fig. 4. The results of rapid voltage. changes at point of common coupling
.Before and after improving power quality (power quality) of pv
generation. According to the reference line power (reference power line) pvles05
fig. 5. The results of rapid voltage changes at point of common coupling
before and after improving power quality (power quality) of pv
.generation according to the reference voltage (reference power line) pvles15
fig. 6. the results of rapid voltage changes at point of common coupling
before and after improvement of power quality (power quality) of pv
generation. According to the reference line power (reference power line) pvles25
.600 650 700 750 800 850 900 950
2
4
6
8
10
min
% Δ v
% Δv of pv
% Δv of pv-les05
500 550 600 650 700 750 800 850 900 950
2
. 4
6
8
10
% Δ v
min
% Δv of pv
% Δv of pv-les15
500 550 600 650 700 750 800 850 900 950
2
4
6
8
10
% Δ v.
min
% Δv of pv
% Δv of pv-les25
fig. 7., change of power (power profile) between power
.(Real power) produced from pv generation at any time and reference line
power (reference power line) pv-les25
of Figure 7 when considering the use of the reference voltage (reference power
line) pv-les25. for estimating the size of the energy storage system coordinates
.(Energy storage system) to improve power quality (power quality) that
Supply of pv generation is shown to improve power quality produced
from pv generation according to the reference line power pv-les25 a
.Cause power quality at the connection point (point of common coupling) has been updated
. Fluctuating power (power fluctuation) produced
of pv generation has been alleviated
fig. 8. The results of voltage level at point of common coupling, before and
.After improving power quality according to the reference line power
(reference power line) pv-les05 to pv-les30 respectively (in pu)
table i
summary of normal dispatch
pcc% Δv
max
vl-. l (pu)
min
bess sizing
e rated (kj) p rated (kw)
pv profile 9.893 0.905 -
pv-les05 3.216 0.931 76.229 1,386.9
pv-les10 1.313 0.937 94.527 2,709.2
pv-les15 0.876 0.946 129.488 3,135.9
pv-les20 0.651 0.950 156.328 3,293.0
pv-les25 0.516 0.952 191.525 3,349.4
pv-les30 0.427 0.953 236.569 3,363.9
table ii
summary of islanding dispatch 1
pcc% Δv
max
vl. -l (pu)
min
bess sizing
e rated (kj) p rated (kw)
pv profile 0.359 0.996 -
table iii
summary of islanding dispatch 2
pcc% Δv
max
vl-l (pu).
min
bess sizing
e rated (kj) p rated (kw)
.pv profile 53.918 0.659 -
pv-les30 1.034 0.944 236.569 3,363.9
pv-les35 0.892 0.948 292.728 3,360.5
pv-les40 0.784 0.952 350.700 3,350.4
pv-les45 0.698 0.956 405.701 3,338.8
pv-les50 0.629 0.958 474.786 3,328.5
400 500 600. 700 800 900 1000 1100 1200
0
1
2
3
4
min
mw
pv profile
pv. profile(les25)
0.89
0.9
0.91
0.92
0.93
0.94
0.95
0.96
0.97
pv
pvles05
pvles10
pvles15
pvles20
pvles25
pvles30 case 1
case 2
case 3
case 4
fig. 9. the results of voltage level at point of common coupling, before and
back to improve the quality of electric power, according to the reference line power
(reference power line. ) pv-les30 to pv-les50 respectively (in pu)
b.Power in the state secession independence (islanding dispatch)
when handling loads (load) is a balance between the needs
power (energy demand) and capacity of diesel generator resulting
pressure change (rapid voltage. changes) and the voltage (voltage
.level) point (point of common coupling) according to the criteria set
. Although the transmission power of pv generation time
(, although the transmission power of pv generation.) Show
.Table 2 in this case, there is a need to improve the power quality of the
pv generation due to the balance of the load (load) and capacity
(generation) including the installation of diesel generator near the load
. (load)

ผลลัพธ์ (อังกฤษ) 2:

III. BESS SIZING METHOD
in this article has been proposed to determine the size of the grid generation technique by BESS reference
power (power line reference technique.) In conjunction with the creation of reference line with
power conditioning methods, exponential smooth linear (Linear
.Exponential Smoothing, LES), which is a suitable way to determine the size of the active
BESS in conjunction with PV generations and effectively in control of the coordinate dimension
BESS compared to traditional methods is a Simple Moving Average (SMA),
. Exponential Moving Average (EMA) and the First-order Low Pass Filter (LPF)
[5]
Fig. 3. Modeling the fluctuation of power generation with migrating PV

A. BESS BESS's scaling techniques to create power reference paths [5]
(a power rating by BESS reference line evaluation technique)
.Considering that 3 can display the relationships (1) through (5)

Pref = Pbess Ppv (1),
, (), (), (), P ref = ref pv bess t P t P t (2), max
, () = P P pv bess ref rated t − t P (3)
1
0
, () () t


t
ref bess bess t ∫ t dt P = E (4) min max
, (()) (()), the bess bess bess rated t E t E E = − (5)
.Where ref P is the Power of reference power line, pv P is the Power of
PV generations, bess P is access power from BESS, , ( ) bess ref P tis access
power from BESS at t , bess,rated P is the Power Rated of BESS, ( ) bess E t
is access energy at t and bess,rated E is the Energy Rated of BESS
B. To create a reference grid electrical power by means of adjusting the smooth exponential linear [6]
(linear reference by exponential smoothing power line creation) by an important relationship
(8) to (12)
(2) t t t-a = F′ F′ ' (8)
(-1)
t (1-) α t F F t b

⎤ ⎢ ⎥ ⎡ α

⎢ ⎥
⎢⎣ ⎥⎦
=. ′ ′′ (9)
-1 (1-1) t t t α = α X F′ F′ (10)
-1 (1-1) t t t α = α ' F′ F′ F′ ' (11) t t t = F a
b (12)
t Where F is the smoothing data value at t, t X is the data value at t,
α is a smoothing factor, t and t ' are first F′ and F′ second smoothing data value is respectively a
t and t, b is slope intercept.
IV. SIMULATION RESULTS
A. power in normal conditions (NORMAL DISPATCH)
.As a result, the simulation sends power in normal conditions (normal dispatch) from
substation (substation) To reach the feeder (feeder No.9) 9 power station
(substation) A. Mae Sariang is 106 km distance there are generation PV.
.Connected to the electrical network system (power grid). I found that before the update
quality electrical power (power quality) of the minimum voltage levels generation PV
(minimum RMS voltage level) connection point (the point of common coupling) is the Voltage value
pu 0.905 fluctuation of voltage is a definite series as
.Amplitude fluctuation which changes between 0.95 and 1.05 in pu pu
medium voltage (MV) and system change of maximum pressure
(maximum rapid voltage changes) 9.893% Normally, not more than 4% to [7]
4 to 6 show the picture after improvement of input power PV
.Generation, electric power in accordance with the reference line (power line reference) PVLES05
-PV-LES30 found that the change of voltage (voltage rapid
changes) at the connection point (the point of common coupling). Lower
4%.When considering the level of voltage (voltage level) connection point (the point of common coupling constant). I found that to compensate for the fluctuations of electric power (power fluctuation)
reference line to meet the power and PV-LES25 PV-LES20, PV-LES30
.Only the results of pressure level (voltage level). The connection point on the given criteria standard image
8 this study chose a reference supporting large-scale assessment PV-LES25 power
coordinates of BESS because
.Effect of change of voltage (rapid voltage changes) and the level of the supply voltage (voltage level)
connection point is in accordance with the standard set includes a coordinates system (rated)
stored energy (energy storage system) at a minimum and sufficient
.With demand for quality improvement of power supply (power quality). With coordinates energy
(energy rated) and coordinates input power (rated power) and 191.525 3 kW, kJ
349.4 respectively. Display: table 1
4 The results of Fig. rapid voltage changes. at point of common coupling
.Before and after improving the quality of electric power (power quality) of PV
generation to meet the power reference line. (Reference power line) PVLES05
Fig. 5. The results of rapid voltage changes at point of common coupling
before and after improving the quality of electric power (power quality) of PV
.Generation, electric power in accordance with the reference line. (Reference power line) PVLES15
Fig. 6. The results of rapid voltage changes at point of common coupling
before and after improving the quality of electric power (power quality) of PV
generation to meet the power reference lines (power line reference) PVLES25
.600 650 700 750 800 850 900 950
2
4
6
8
10
min
% Δ V
%ΔV of PV
%ΔV of PV-LES05
500 550 600 650 700 750 800 850 900 950
2
4
6
8
10
% Δ V
min
%ΔV of PV
%ΔV of PV-LES15
500 550 600 650 700 750 800 850 900 950
2
4
6
8
10
% Δ V
min
%ΔV of PV
%ΔV of PV-LES25
Fig. 7. Changes of electrical power (power profile). Between power
(Real power) produced from PV generation at any time and the reference path
power (reference power line) PV-LES25
7 pictures from when considering using power reference line (power line reference
) PV-LES25. For the measurement of energy storage systems coordinate dimension
.(Energy storage system) to improve the quality of electrical power (power quality)
export from PV generation will see that improving the quality of electric power produced by the generation PV
to
PV-LES25 power reference.The quality of the electrical connection point (the point of common coupling). Get
updated due to fluctuations of electric power (power fluctuation).
from PV generation were relieved the results
8. Fig. of voltage level at point of common coupling and
.After improving the quality of electric power to meet the power reference line
(reference power line) PV-LES05. To PV-LES30 respectively (in pu) SUMMARY TABLE OF NORMAL

I

V Δ% DISPATCH PCC MAX
VL-L (pu)


MIN rated Sizing BESS E (kJ) rated P (kW)
-
0.905 9.893 profile PV PV-LES05 76.229 0.931 3.216 1, PV-LES10 94.527
386.9 0.937 1.313 2709.2
PV-LES15 0.876 0.946 129.488 3,135.9
PV-LES20 0.651 0.950 156.328 3,293.0
PV-LES25 0.516 0.952 191.525 3,349.4
PV-LES30 0.427 0.953 236.569 3,363.9
TABLE II
SUMMARY OF ISLANDING DISPATCH 1
PCC %ΔV
MAX
VL-L (pu)
MIN
BESS Sizing
E rated (kJ) P rated (kW)
PV profile 0.359 0.996 - -
TABLE III
SUMMARY OF ISLANDING DISPATCH 2
PCC %ΔV
MAX
VL-L (pu)
MIN
BESS Sizing
E rated (kJ) P rated (kW)
PV profile 53.918 0.659 - -
PV-LES30 1.034 0.944 236.569 3,363.9
PV-LES35 0.892 0.948 292.728 3,360.5
PV-LES40 0.784 0.952 350.700 3,350.4
PV-LES45 0.698 0.956 405.701 3,338.8
PV-LES50 0.629 0.958 474.786 3,328.5
400 500 600 700 800 900 1000 1100 1200
0
1
2
3
4
min
MW
PV profile
PV profile(LES25)
0.89
0.9
0.91
0.92
0.93
0.94
0.95
0.96
0.97
PV
PVLES05
PVLES10
PVLES15
PVLES20
PVLES25
PVLES30 Case 1 Case 2 Case 3



4 Case Fig. 9. results of the voltage level at point of common coupling and
after improving the quality of electric power to meet the power reference line
(reference power line) PV-LES30. And PV-LES50, respectively. (in pu)
B. State power factor (ISLANDING DISPATCH)
when handling loads (load) is appropriate for ดุลย between the demand for energy (energy demand) and
Capacity of Diesel generator. Make the results
pressure change (rapid voltage changes) and the level of the supply voltage (voltage
.Level) connection point (the point of common coupling) benchmark is met even if the assignment of
transmission power from the PV generation,
(Although, the transmission power of PV generation.) Show
Table 2: in this case, there is no need to improve the quality of the electrical power generation PV
because of possible ดุลย of the load (load) and
(generation), as well as the installation location of the Diesel generator located near load
(load)

ผลลัพธ์ (อังกฤษ) 3:

III. BESS SIZING METHOD
in this article we have presented a technique for determining the size of a BESS
create power line reference (Reference power line technique), together with the reference power line
create a simple way to point to a number of power lines (Linear
Exponential Smoothing, LES), which is a method that is appropriate to the size of the
BESS PV generations that is compatible with and have a good performance in a range of BESS
control when compared to traditional method is Simple Moving
Average (SMA),Exponential Moving Average (EMA), and First - Order Low
Pass Filter (LPF) 5]
Fig. 3.Modeling migrating the fluctuation of power generation with PV BESS

A. The size of the hair BESS with technical reference conductors [ 5]
(BESS rating evaluation by a power line reference technique)
When you consider the figure 3 shows the relationship as can be (1) and
(5) in the order
Pref=Ppv Pbess (1)
, ( ), () - () bess ref ref pv P P T T T = P (2)
, Max () () bess rated pv P ref=P − P T T (3)
1
0
, ( ), ( ),
T
T

bess bess ref E ∫ P T = T dt (4)
, Max ( (). min () bess bess bess rated E=E − E T T (5)
ref Where P Power is the reference of power line, pv is the P Power PV
of generations, bess P access is power from BESS, ( ), bess ref P tis access
power from BESS at t, bess, rated P is the Power Rated of BESS, ( ), bess E
T is access energy at T and bess, rated E is the Energy Rated of BESS
B.Power-line reference to create a simple way to show a number of power lines [ 6]
(Reference power line creation by linear exponential smoothing)
is the relationship with the most important: (8) to (12),
(2) - T T t a=F ′ F ′ ′ (8)
( -)
t (1-) T T B α F F α


⎡ ⎤ ⎢ ⎥

⎢ ⎥ ⎢ ⎣ ⎥ ⎦
=′ ′ ′ (9)
- 1 (1-) = T T T F ′ α X α F ′ (10)
- 1 (1-) = T T T F ′ ′ α F ′ α F ′ ′ (11)
T T T F = a B (12)
T Where F smoothing data is the value at t, T X data is the value at t,
α is a smoothing factor, T and T F ′ F ′ ′ are first and second smoothing data
value respectively, t a and T B is slope intercept is.
IV.SIMULATION RESULTS
A.The power in normal (NORMAL DISPATCH)
simulation results from the electric power supply in normal (Normal dispatch) from
electric Station (substation) hot feeder circuits 9 (feeder No P9) to power stations
(substation) Mae Sariang is 106 km distance. PV generation
Connect to power network system (power grid) found that before the update
quality Power (Power Quality) of PV generation minimum pressure level
(minimum RMS voltage level) at the access point (point of common coupling) is 0.905
pu which is exceeded Voltage fluctuation as a definite series of voltage
amplitude fluctuation which changes between 0.95 and 1.05 pu pu
in medium voltage (MV) system. And the changes of maximum pressure
(maximum rapid voltage changes) 9.893 % usually must be no more than 4 %. [ 7]
show as 4 to 6 after the improvement of the quality of electric power PV
generation of electric power line reference (Reference power line) at 05 PVLES PV
to - LES 30 found that the change of pressure (
rapid voltage changes) at the access point (point of common coupling) lower than 4 %, and then
When considering voltage level (voltage level) at the access point (point of common coupling
) found that the compensation, the volatility of Power (Power fluctuation)
according to power-line reference PV - LES 20, PV - LES PV and 25 - 30 LES
Only the results of voltage level (voltage level) at the access point is in
criteria standards as shown in Figure 8 of this study and therefore choose to use power-line reference
PV - LES 25 includes an assessment of a rated BESS because
The change of pressure (Rapid voltage changes), and the level of pressure
(voltage level) at the access point with the standard set includes a rating
(rated) of energy storage system (energy storage system), the minimum and sufficient
the need to improve the quality of electric power quality) by a power rating
(energy rated) and power rating (rated power) 191.525 kJ and 3,349.4
kW respectively as shown in Table 1
Fig 4. The results of rapid voltage changes at point of common coupling
before and after the improvement of the quality Power (Power Quality) of PV
generation to power-line reference (Reference power line) 05
Fig PVLES 5. The results of rapid voltage changes at point of common coupling
before and after the improvement of the quality power (power quality) of PV
generation shall be in accordance with the reference Power (Power Line Reference) 15
PVLES Fig. 6. The results of rapid voltage changes at point of common coupling
before and after the improvement of the quality power (power quality) of PV
generation, a reference to the power line (Reference power line) 25 PVLES
600650 700750 800850 900950
2
4
6
8
10
min
%
% Δ V Δ V PV of
%Δ V of PV - LES
05 500550 600650 700750 800850 900950
2
4
6
8
10
%
% Δ V
min Δ V PV of
%Δ V of PV - LES
15 500550 600650 700750 800850 900950
2
4
6
8
10
%
% Δ V
min Δ V PV of
%Δ V of PV - LES 25
Fig.7. Change of power (power profile) between conductors
(real power) that are made from PV generation at any time and Line Reference
power (Reference Power Line), PV - LES 25
from the reference line 7 when considering the power (Power
reference line) PV - LES 25 for evaluation of a rated power storage system
(energy storage system) in order to improve the quality Power (Power Quality)
PV from generation to pay for it should be noted that the improvement of the quality of electrical power production from PV
generation to power-line reference PV - LES
a 25The quality of electricity access point (point of common coupling) are
update because of the volatility of Power (Power fluctuation) produced from
PV generation is lessened.
Fig. 8. The results of voltage level at point of common coupling before and
After the improvement of the quality of power power line reference
(Reference Power Line), PV - LES PV to 05 - 30 LES respectively (in pu)

TABLE I SUMMARY OF NORMAL DISPATCH
PCC %Δ V MAX

VL - L (pu) MIN


BESS Sizing E rated (kJ) P rated (kW)
PV profile 9.893 0.905 - -
PV - LES 05 3.216 0.931 76.229 1,386.9
PV - LES 10 1.313 0.937 94.527 2,709.2
PV - LES 15 0.876 0.946 129.488 3,135.9
PV - LES 20 0.651 0.950 156.328 3,293.0
PV - LES 25 0.516 0.952 191.525 3,349.4
PV - LES 30 0.427 0.953 236.569 3,363.9

TABLE II SUMMARY OF ISLANDING DISPATCH 1 %
PCC Δ V

MAX VL - L (pu) MIN


BESS Sizing E rated (kJ) P rated (kW)
PV profile 0.359 0.996 - -

TABLE III SUMMARY OF ISLANDING DISPATCH 2 %
PCC Δ V MAX

VL - L (pu) MIN


BESS Sizing E rated (kJ) P rated (kW)
Profile PV 53.918 0.659 - -
PV - LES 30 1.034 0.944 236.569 3,363.9
PV - LES 35 0.892 0.948 292.728 3,360.5
PV - LES 40 0.784 0.952 350.700 3,350.4
PV - LES 45 0.698 0.956 405.701 3,338.8
PV - LES 50 0.629 0.958 474.786 3,328.5
400500 600700 800900 1000 1100 1200
0
1
2
3
4

min MW
profile
PV PV profile (LES 25)

0.9
0.89 0.91 0.92


0.93 0.94 0.95


0.96 0.97

PV PVLES PVLES 05
10
15
PVLES PVLES PVLES 20
25
30 PVLES Case Case1
2
3
Case Case 4
Fig. 9. The results of voltage level at point of common coupling before and after the improvement of the quality of electric power
to
power-line reference (Reference power line), PV - LES 30 to PV - LES 50 respectively (in pu)
B.The power to separate the independent State (ISLANDING DISPATCH)
when a load Management (load) a balance between the energy demand
(energy demand) and Capacity Diesel of generator, pressure
changes (Rapid voltage changes), and the level of voltage (voltage
Level) at the access point (point of common coupling), according to standard criteria set
although there will be a distribution of power generation, PV
(, the transmission power of PV Although generation.)
As table 2 in this case is not necessary to improve the quality of electrical power generation PV
because of the balance of the load (load) and the production capacity
(generation), as well as the installation of a generator Diesel is close to
load (load).