JP3049743B2 - Test load equipment - Google Patents
Test load equipmentInfo
- Publication number
- JP3049743B2 JP3049743B2 JP21470090A JP21470090A JP3049743B2 JP 3049743 B2 JP3049743 B2 JP 3049743B2 JP 21470090 A JP21470090 A JP 21470090A JP 21470090 A JP21470090 A JP 21470090A JP 3049743 B2 JP3049743 B2 JP 3049743B2
- Authority
- JP
- Japan
- Prior art keywords
- power
- load
- test
- converter
- inverter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Testing Electric Properties And Detecting Electric Faults (AREA)
- Tests Of Circuit Breakers, Generators, And Electric Motors (AREA)
Description
【発明の詳細な説明】 A.産業上の利用分野 本発明は、電動機、発電機、変圧器、電力変換装置等
の電気機器の諸特性を試験する試験用負荷設備に関す
る。Description: TECHNICAL FIELD The present invention relates to a test load facility for testing various characteristics of electric equipment such as a motor, a generator, a transformer, and a power converter.
B.発明の概要 本発明は、交流電源の出力電力が供給される電気機器
に、負荷として電気的に接続され、当該電気機器の諸特
性を試験する試験用負荷設備であって、 前記電気機器に電気的に接続され、交流電力を直流電
力に変換するとともに直流設定電圧を任意に設定するこ
とができるコンバータと、 直流設定電圧を任意に設定することができ、前記コン
バータの出力電力を前記交流電源と同一周波数の交流電
力に変換し、前記交流電源に返還するインバータとを備
えたことにより、 電力損失の低減化が図れるとともに高効率で質の高い
負荷試験を実施することができるようにしたものであ
る。B. Summary of the Invention The present invention is a test load facility that is electrically connected as a load to an electric device to which output power of an AC power supply is supplied and tests various characteristics of the electric device, A converter that is electrically connected to the DC power supply and converts the AC power into DC power and can arbitrarily set a DC set voltage; and a DC set voltage that can be arbitrarily set. By providing an inverter that converts into AC power of the same frequency as the power supply and returns to the AC power supply, power loss can be reduced, and a high-efficiency and high-quality load test can be performed. Things.
C.従来の技術 従来電気機器の実負荷試験は水抵抗器、リアクトル等
を用いて負荷をとり各機器に応じて次のような方式で行
われていた。C. Prior Art Conventionally, an actual load test of an electric device was performed by using a water resistor, a reactor, or the like, taking a load and performing the following method according to each device.
電動機（モータ） モータが１台のときは、直流発電機または交流発電機
を直結して水抵抗器等で負荷を消費させる方法や、電
圧、電流に分けて試験し計算により等価的に試験成績を
出す方法がある。同一定格のモータ２台のときは直結し
て１台はモータ、他の１台は発電機として損失分だけ電
源より補給する返還法がある。Electric motor (motor) When there is only one motor, a method of directly connecting a DC or AC generator to consume the load with a water resistor or the like, or dividing the test into voltages and currents and equivalently calculating the test results by calculation There is a way out. In the case of two motors of the same rating, there is a return method in which one motor is connected directly, and the other motor is used as a generator, and the other motor is supplied from the power supply as much as the loss.
発電機 発電機１台のときは水抵抗器で消費させる。同一定格
の発電機２台のときは前記と同様に直結して行う返還
法がある。Generator When using only one generator, consume it with a water resistor. In the case of two generators having the same rating, there is a return method in which the generator is directly connected in the same manner as described above.
変圧器 電圧、電流に分けて試験し計算により求める方法があ
る。（モータと同一） 電力変換装置 数百KVAクラスまでは実負荷試験、数百を超え数千KVA
クラスでは電圧（無負荷試験）、電流（低圧電流試験）
に分けて行い、等価計算で成績を出す。Transformer There is a method to test by dividing into voltage and current and to obtain by calculation. (Same as motor) Power converter Up to several hundred KVA class, actual load test, more than hundreds to several thousand KVA
Voltage (no load test), current (low voltage current test) in class
And divide the results into equivalents.
D.発明が解決しようとする課題 上記のように同一定格機器が２台以上有るときは返還
法を行い、容量が非常に大きいときは電圧、電流試験を
行い、それなりに無駄の少ない試験を行っている。しか
し実負荷試験を行うものにあっては、実際に水抵抗器等
に電力を消費させるので試験中の電力は非常に無駄なも
のとなる。例えば500KVA電力変換装置の温度上昇試験を
行うことを考えてみると、負荷力率0.85とし、温度上昇
試験で温度が一定値になるまで約５時間要するとし、電
気料金が15円/KWhとすれば、 500KVA×0.85（力率）×５時間＝2125KWh 2125KWh×15円＝31875円となる。従って月々3000KVA
の実負荷試験を行うとすれば年間約230万円分の電力を
無駄に消費することになる。D. Problems to be Solved by the Invention As described above, when there are two or more devices with the same rating, the return method is performed, and when the capacity is extremely large, the voltage and current tests are performed, and the test with little waste is performed. ing. However, in the case of performing an actual load test, power is actually consumed by the water resistor or the like, so that the power during the test is very wasteful. For example, considering a temperature rise test of a 500 KVA power converter, the load power factor is 0.85, and it takes about 5 hours for the temperature to reach a constant value in the temperature rise test, and the electricity rate is 15 yen / KWh. Then, 500 KVA x 0.85 (power factor) x 5 hours = 2125 KWh 2125 KWh x 15 yen = 31875 yen. Therefore 3000 KVA per month
If the actual load test is performed, about 2.3 million yen of power will be wasted annually.
本発明は上記の点に鑑みてなされたものでその目的
は、高効率で省エネルギー化を図ることができるととも
に質の高い試験を検証できる試験用負荷設備を提供する
ことにある。The present invention has been made in view of the above points, and an object of the present invention is to provide a test load facility capable of achieving high efficiency and energy saving and verifying a high quality test.
E.課題を解決するための手段 本発明は、交流電源の出力電力が供給される電気機器
に、負荷として電気的に接続され、当該電気機器の諸特
性を試験する試験用負荷設備であって、前記電気機器に
電気的に接続され、交流電力を直流電力に変換するとと
もに直流設定電圧を任意に設定することができるコンバ
ータと、直流設定電圧を任意に設定することができ、前
記コンバータの出力電力を前記交流電源と同一周波数の
交流電力に変換し、前記交流電源に返還するインバータ
とを備えたことを特徴としている。E. Means for Solving the Problems The present invention is a test load facility that is electrically connected as a load to an electric device to which output power of an AC power supply is supplied and tests various characteristics of the electric device. A converter that is electrically connected to the electric device, converts AC power into DC power, and can arbitrarily set a DC set voltage, and a DC set voltage that can be arbitrarily set, and an output of the converter. An inverter for converting power into AC power having the same frequency as the AC power supply and returning the AC power to the AC power supply is provided.
F.作用 被試験機（交流電源の出力電力が供給される電気機
器）から導かれる交流電力はコンバータによって一旦直
流電力に変換される。このとき負荷力率はアクティブフ
ィルタの原理で任意に設定することができる。コンバー
タの出力電力はインバータによって交流電力に変換され
て交流電源側へ返還（回生）される。このときコンバー
タ、インバータの直流電圧設定値に差をつけておけば負
荷率を例えば0,25,50,75,100％にすることができる。こ
のように被負荷試験機の負荷電力の殆どが電源側に返還
され、電力損失はコンバータ、インバータでの変換ロス
（約10％）だけとなるので、従来装置に比べてはるかに
効率の高い試験用負荷設備を提供することができる。F. Operation The AC power guided from the EUT (electrical equipment to which the output power of the AC power supply is supplied) is temporarily converted to DC power by the converter. At this time, the load power factor can be arbitrarily set based on the principle of the active filter. The output power of the converter is converted into AC power by the inverter and returned (regenerated) to the AC power supply side. At this time, if a difference is set between the DC voltage setting values of the converter and the inverter, the load factor can be set to, for example, 0, 25, 50, 75, and 100%. In this way, most of the load power of the tested machine is returned to the power supply side, and the power loss is only conversion loss (about 10%) in the converter and inverter, so the test is much more efficient than the conventional equipment. Load equipment can be provided.
G.実施例 以下、図面を参照しながら本発明の一実施例を説明す
る。第１図は全体のシステム構成を示し、交流電源１の
母線２に接続された被試験機（電気機器）３、負荷設備
４の間で電力は矢印のように授受される。負荷設備４は
例えば第２図のように構成される。第２図において、被
試験機３から導かれる交流電力はしゃ断器10およびトラ
ンス11を介して交流電力を直流電力に変換するコンバー
タ12に導かれる。このコンバータ12は電圧形自制式PWM
コンバータであり、自己消弧形半導体素子（パワートラ
ンジスタ、ゲートターンオフサイリスタ等）で構成され
ている。コンバータ12の出力側は直流電力を交流電力に
変換するインバータ13に接続されている。このインバー
タ13は電圧形自制式PWMインバータであり、自己消弧形
半導体素子（パワートランジスタ、ゲートターンオフサ
イリスタ等）で構成されている。インバータ13の出力側
はインバータトランス14およびしゃ断器15を介して前記
母線２に接続されている。G. Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows the overall system configuration, in which electric power is transferred between a device under test (electric equipment) 3 and a load facility 4 connected to a bus 2 of an AC power supply 1 as shown by arrows. The load equipment 4 is configured, for example, as shown in FIG. In FIG. 2, AC power guided from a device under test 3 is guided via a circuit breaker 10 and a transformer 11 to a converter 12 for converting AC power into DC power. This converter 12 is a voltage-controlled self-control PWM
The converter is a self-extinguishing semiconductor device (power transistor, gate turn-off thyristor, etc.). The output side of converter 12 is connected to inverter 13 which converts DC power into AC power. The inverter 13 is a self-controlling voltage-type PWM inverter, and is composed of a self-extinguishing semiconductor device (power transistor, gate turn-off thyristor, etc.). The output side of the inverter 13 is connected to the bus 2 via an inverter transformer 14 and a circuit breaker 15.
上記のように構成された装置において、被試験機３か
ら導かれる交流電力はコンバータ12によって一旦直流電
力に変換される。このときコンバータ12はアクティブフ
ィルタの原理で負荷力率を自由に設定することができ
る。コンバータ12より出力された直流電力はインバータ
13で電源母線２の周波数に同期させつつ電圧を合わせて
電源側へ送り出す。この送り出す電力はコンバータ12お
よびインバータ13の直流電圧を設定し、さらにその間に
僅かの電圧差を作り出すことにより自在にコントロール
できる。このため負荷率を0,25,50,75,100％のように設
定して試験データを作成することも随意となる。同様に
前述のように力率を設定できるので任意の負荷力率試験
も可能である。このようにして試験を行うと、被試験機
３の負荷電力の殆どが交流電源１側に返還され、電力損
失はコンバータ12、インバータ13での変換ロス（約10
％）だけとなる。従って従来に比べてはるかに効率の高
い試験用負荷設備を提供することができる。尚、負荷設
備４は必要に応じて第３図のようにトランス11を除去
し、コンバータ12をダイオードまたはサイリスタの整流
器で構成しても良い。In the device configured as described above, the AC power guided from the device under test 3 is once converted into DC power by the converter 12. At this time, converter 12 can freely set the load power factor based on the principle of an active filter. DC power output from converter 12 is converted to inverter
At 13, the voltage is adjusted and sent to the power supply side while synchronizing with the frequency of the power supply bus 2. The power to be sent can be freely controlled by setting the DC voltage of the converter 12 and the inverter 13 and creating a slight voltage difference therebetween. For this reason, it is optional to set test factors such as 0, 25, 50, 75, and 100% to create test data. Similarly, since the power factor can be set as described above, an arbitrary load power factor test is also possible. When the test is performed in this manner, most of the load power of the EUT 3 is returned to the AC power supply 1 side, and the power loss is caused by the conversion loss (about 10
%) Only. Therefore, it is possible to provide test load equipment which is much more efficient than in the past. The load equipment 4 may have a configuration in which the transformer 11 is removed as necessary as shown in FIG. 3 and the converter 12 is constituted by a rectifier of a diode or a thyristor.
H.発明の効果 以上のように本発明によれば半導体式コンバータ、イ
ンバータによって、負荷として用いた電力を電源側に返
還しながら負荷試験を行うようにしたので、次のような
優れた効果が得られる。H. Effects of the Invention As described above, according to the present invention, the semiconductor converter and the inverter perform the load test while returning the power used as the load to the power supply side. can get.
（１） 水抵抗器等のように単に電力を消費せず、試験
として用いた電力を電源側へ返還するので、極めて高効
率で省エネルギー設備が提供される。(1) Since the power used for the test is returned to the power supply side without simply consuming power as in a water resistor or the like, extremely high-efficiency energy-saving equipment is provided.
（２） 被負荷試験機の負荷率、負荷力率を随意に設定
でき且つ設定器１個で簡単に設定変更、調節ができるの
で、試験の段取りを短時間に行うことができスピードア
ップを図ることができる。これに対し水抵抗器では電極
昇降に時間を要し、その設定も精度高くできない。(2) Since the load factor and load power factor of the machine to be loaded can be set arbitrarily and can be easily changed and adjusted with a single setting device, test setup can be performed in a short time and speeding up can be achieved. be able to. On the other hand, in the case of the water resistor, it takes time to raise and lower the electrode, and the setting cannot be performed with high accuracy.
（３） 設定が電子式であるため精度、安定性とも高く
質の高い試験成績が得られる。一方水抵抗器では水の中
の塩分濃度、液温等で抵抗値が常に変化し、精度高く安
定した負荷を取り続けることが難しい。(3) Since the setting is of the electronic type, high-quality test results are obtained with high accuracy and stability. On the other hand, in a water resistor, the resistance value constantly changes depending on the salt concentration in the water, the liquid temperature, and the like, and it is difficult to maintain a stable load with high accuracy.
（４） 従来は、水抵抗器だけでは抵抗分しか取れず遅
れ力率負荷とするためには別のリアクトル及びその可変
設備（インダクションレギュレータ等）が必要となり、
段取りが複雑で調整が難しかった。その点本発明によれ
ば遅れ力率、進み力率が自在に設定でき、リアクトルの
ような負荷設備は不要である。(4) Conventionally, a water resistor alone can only take the resistance, and a separate reactor and its variable equipment (such as an induction regulator) are required to obtain a delayed power factor load.
The setup was complicated and difficult to adjust. In this regard, according to the present invention, the delay power factor and the advance power factor can be set freely, and load equipment such as a reactor is unnecessary.
（５） 本発明はインバータ式のため静止形で低騒音、
高効率であるため、例えば発電機等の返還法に代わる新
型負荷設備としてもリプレースできる。(5) The present invention is an inverter type, which is stationary and has low noise.
Because of its high efficiency, it can be replaced as a new type of load equipment that replaces the return method of a generator, for example.
第１図は本発明の実施例のシステム構成図、第２図は実
施例の負荷設備の一例を示す回路図、第３図は実施例の
負荷設備の他の例を示す回路図である。 １……交流電源、２……電源母線、３……被試験機、４
……負荷設備、10,15……しゃ断器、12……コンバー
タ、13……インバータ、14……インバータトランス。FIG. 1 is a system configuration diagram of an embodiment of the present invention, FIG. 2 is a circuit diagram showing an example of a load facility of the embodiment, and FIG. 3 is a circuit diagram showing another example of a load facility of the embodiment. 1 AC power supply 2 Power bus 3 Machine under test 4
…… Load equipment, 10,15 …… Circuit breaker, 12 …… Converter, 13 …… Inverter, 14 …… Inverter transformer.
Claims (1)
に、負荷として電気的に接続され、当該電気機器の諸特
性を試験する試験用負荷設備であって、 前記電気機器に電気的に接続され、交流電力を直流電力
に変換するとともに直流設定電圧を任意に設定すること
ができるコンバータと、 直流設定電圧を任意に設定することができ、前記コンバ
ータの出力電力を前記交流電源と同一周波数の交流電力
に変換し、前記交流電源に返還するインバータとを備え
たことを特徴とする試験用負荷設備。1. A test load facility electrically connected as a load to an electrical device to which output power of an AC power supply is supplied, for testing various characteristics of the electrical device, wherein the load device is electrically connected to the electrical device. A converter that can be connected to convert the AC power to DC power and set the DC set voltage arbitrarily; and that the DC set voltage can be set arbitrarily and that the output power of the converter is the same frequency as the AC power supply. And an inverter for converting the AC power into AC power and returning the AC power to the AC power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21470090A JP3049743B2 (en) | 1990-08-14 | 1990-08-14 | Test load equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21470090A JP3049743B2 (en) | 1990-08-14 | 1990-08-14 | Test load equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0495882A JPH0495882A (en) | 1992-03-27 |
| JP3049743B2 true JP3049743B2 (en) | 2000-06-05 |
Family
ID=16660158
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21470090A Expired - Fee Related JP3049743B2 (en) | 1990-08-14 | 1990-08-14 | Test load equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3049743B2 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04264271A (en) * | 1991-02-20 | 1992-09-21 | Toshiba Corp | Method for testing power converter |
| JPH04264270A (en) * | 1991-02-20 | 1992-09-21 | Toshiba Corp | Method for testing power converter |
| JPH081452B2 (en) * | 1992-02-07 | 1996-01-10 | 山菱電機株式会社 | Switching type simulated load device |
| JP4186110B2 (en) | 2003-07-31 | 2008-11-26 | 株式会社ジェイテクト | Steering device |
| JP5672713B2 (en) * | 2010-02-17 | 2015-02-18 | 富士電機株式会社 | Generator load test equipment |
| WO2012093492A1 (en) * | 2011-01-07 | 2012-07-12 | 東芝三菱電機産業システム株式会社 | Test equipment for rotary machine |
| CN106443441A (en) * | 2016-07-12 | 2017-02-22 | 广船国际有限公司 | Ship and maritime work platform medium-voltage power system load test device |
| CN115078881B (en) * | 2022-06-29 | 2024-01-19 | 苏州浪潮智能科技有限公司 | A power compensation loading test device and method |
-
1990
- 1990-08-14 JP JP21470090A patent/JP3049743B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0495882A (en) | 1992-03-27 |
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