JP3453949B2 - Support method for power system state estimation device - Google Patents
Support method for power system state estimation deviceInfo
- Publication number
- JP3453949B2 JP3453949B2 JP24836595A JP24836595A JP3453949B2 JP 3453949 B2 JP3453949 B2 JP 3453949B2 JP 24836595 A JP24836595 A JP 24836595A JP 24836595 A JP24836595 A JP 24836595A JP 3453949 B2 JP3453949 B2 JP 3453949B2
- Authority
- JP
- Japan
- Prior art keywords
- error
- standard deviation
- power system
- measurement
- system state
- 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 - Lifetime
Links
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、系統制御所等で用
いられる電力系統状態推定装置の支援方法に関し、詳し
くは、電力系統の複数地点に設置された電気量測定器か
ら得られるデータを基に、このデータの持つ誤差を圧縮
すると共に測定されていない地点の電気量を推定する機
能を備えた電力系統状態推定装置を対象として、その機
能検証等を行うための支援方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for supporting an electric power system state estimating device used in a power system control station or the like, and more specifically, based on data obtained from electric quantity measuring devices installed at a plurality of points in the electric power system. In addition, the present invention relates to a support method for performing functional verification and the like for a power system state estimation device having a function of compressing the error of this data and estimating the amount of electricity at an unmeasured point.
【０００２】[0002]
【従来の技術】この種の電力系統状態推定装置は、例え
ば社団法人電気学会発行の「電気工学ハンドブック（昭
和６３年度版）」第６１項等に示されている。系統制御
システムにおいて、電力系統状態推定装置を使用する場
合、実系統に適用する前に本装置の機能検証等の事前検
討を十分に行っておく必要があり、そのためには、電力
系統の各地点に設置された電気量測定器から測定値を得
る必要がある。2. Description of the Related Art This kind of power system state estimating device is shown, for example, in "Electrical Engineering Handbook (1988 edition)", Item 61, etc., published by The Institute of Electrical Engineers of Japan. When using a power system state estimation device in a power system control system, it is necessary to perform sufficient preliminary examination such as functional verification of this device before applying it to the actual power system. It is necessary to obtain the measured value from the electric quantity measuring device installed at.
【０００３】しかるに、事前検討の段階ではそれらの測
定値を入手することが一般に困難であるため、電気量測
定器の誤差の標準偏差（想定値）に基づいて正規分布状
に発生させた数値を測定誤差として潮流計算結果（真値
と仮定）に付加することにより測定値を作成し、この測
定値に基づいて電力系統状態推定装置の機能検証等を行
っている。However, since it is generally difficult to obtain the measured values at the preliminary examination stage, the values generated in a normal distribution form based on the standard deviation (estimated value) of the error of the electric quantity measuring device are used. A measurement value is created by adding it to the power flow calculation result (assumed to be a true value) as a measurement error, and the functional verification of the power system state estimation device is performed based on this measurement value.
【０００４】ここで、図４は電力系統状態推定装置とそ
の支援に用いられる従来の電力系統状態推定支援装置と
の関係及びデータの流れを示したものである。図におい
て、状態推定支援装置１００は、系統の接続状態やイン
ピーダンス等の系統固有の系統定数データと、想定され
たある運用状態における各母線の有効電力、無効電力及
び電圧等の系統状態データと、電気量測定器の誤差の標
準偏差データとを取り込み、状態推定装置２００が必要
とする測定値（測定値データ）を作成する。状態推定装
置２００は、この測定値データと前記系統定数データと
を取り込み、状態推定計算を行って状態推定結果データ
を作成する。Here, FIG. 4 shows the relationship between the power system state estimation device and the conventional power system state estimation support device used to support the same, and the data flow. In the figure, the state estimation support device 100 includes system-specific system constant data such as a system connection state and impedance, and system state data such as active power, reactive power, and voltage of each bus in an assumed certain operating state, The standard deviation data of the error of the electric quantity measuring device is taken in, and a measurement value (measurement value data) required by the state estimation device 200 is created. The state estimation device 200 takes in the measured value data and the system constant data, performs state estimation calculation, and creates state estimation result data.
【０００５】図５は従来の状態推定支援処理における測
定値作成方法を示すフローチャートである。以下、各ス
テップについて簡単に説明する。
系統定数の入力
系統の接続状態やインピーダンス等の系統固有の定数を
入力する。
系統状態の入力
ある運用状態を想定して各母線の有効電力、無効電力及
び電圧を入力する。FIG. 5 is a flowchart showing a method of creating a measured value in the conventional state estimation support processing. Hereinafter, each step will be briefly described. Input of system constants Input system constants such as system connection status and impedance. Input of system status Active power, reactive power and voltage of each bus are input assuming a certain operation status.
【０００６】潮流計算の実行
ある運用状態での各線路の有効電力潮流、無効電力潮流
及び負荷母線の電圧、発電機母線の無効電力を求めるた
めに、前述の，の入力データを用いて潮流計算を実
行する。潮流計算の方法には種々あるが、ここでは、非
線形連立方程式の一般解法の一つであるニュートンラフ
ソン法を用いている（例えば、上掲「電気工学ハンドブ
ック（昭和６３年度版）」第９１２項参照）。この潮流
計算結果を真値と仮定して、以後のステップにより測定
値を作成する。Execution of power flow calculation In order to obtain active power flow, reactive power flow and load bus voltage, and generator bus reactive power of each line in a certain operating state, the power flow calculation is performed by using the input data of the above. To execute. There are various methods for calculating the power flow, but here, the Newton-Raphson method, which is one of the general solution methods for nonlinear simultaneous equations, is used (for example, item 912 of "Electrical Engineering Handbook (1988)"). reference). This power flow calculation result is assumed to be a true value, and measurement values are created in the subsequent steps.
【０００７】測定地点情報の入力
電力系統に設置されている電気量測定器の位置（測定地
点）及び数（測定地点数）を入力する。
比例分誤差の標準偏差入力
正規分布状の誤差を作成する際に必要な、比例分誤差の
標準偏差を入力する。Input of Measurement Point Information The position (measurement point) and the number (number of measurement points) of the electricity quantity measuring devices installed in the power system are input. Input standard deviation of proportional error Input the standard deviation of proportional error, which is necessary when creating a normal distribution error.
【０００８】Ｉ＝測定地点数？
全測定地点の測定値を作成（Ｉ＝測定地点数）するま
で、以下の，のステップを繰返し実行する。ここ
で、Ｉは全測定地点の測定値を作成したかを判定するた
めのカウンタである。I = number of measurement points? The following steps are repeatedly executed until the measurement values at all measurement points are created (I = number of measurement points). Here, I is a counter for determining whether or not measurement values at all measurement points have been created.
【０００９】標準偏差を基に測定地点Ｉの誤差作成
（正規分布状）
上記で入力された標準偏差に基づいて測定地点＝Ｉに
おける誤差を作成する。
測定地点Ｉの測定値作成
上記の潮流計算により得られた測定地点＝Ｉにおける
真値と上記により得られた誤差を合成して、測定地点
＝Ｉにおける測定値を作成する。Creating an Error at Measurement Point I Based on Standard Deviation (Normal Distribution) An error at measurement point = I is created based on the standard deviation input above. Creation of Measurement Value at Measurement Point I The true value at the measurement point = I obtained by the above power flow calculation and the error obtained above are combined to create the measurement value at the measurement point = I.
【００１０】[0010]
【発明が解決しようとする課題】一般的に、電気量測定
器は電圧、電流、有効電力、無効電力のうち何れか二つ
以上のデータが得られるものを意味している。そして、
電気量の計測方法により瞬時値型と積分型との二種類に
分けることができ、例えば、有効電力、無効電力は積分
型、電圧、電流は瞬時値型となる。これらの電気量測定
器により得られる測定値には、測定器の持つ固有の誤差
（以下、固有分誤差という）と、測定される電気量の大
きさに比例する誤差（以下、比例分誤差という）との二
つが混合しており、通常、瞬時値型の電気量測定器より
も積分型の電気量測定器の方が原理的に誤差を多く含ん
でいる。Generally, an electric quantity measuring device means one which can obtain data of any two or more of voltage, current, active power and reactive power. And
It can be divided into two types, an instantaneous value type and an integral type, depending on the method of measuring the amount of electricity. For example, active power and reactive power are integral type, and voltage and current are instantaneous value type. The measurement values obtained by these electric quantity measuring devices include an error inherent to the measuring device (hereinafter referred to as an inherent error) and an error proportional to the magnitude of the measured electric amount (hereinafter referred to as a proportional error). ) And two are mixed, and in principle, the integral type electric quantity measuring device contains more errors in principle than the instantaneous value type electric quantity measuring device.
【００１１】電力系統状態推定装置の機能検証等を行う
ために、各電気量測定器による測定値を作成する場合、
従来では次のような問題がある。
（１）実際の電力系統には、瞬時値型及び積分型という
二種類の電気量測定器が混在しているので、これらのタ
イプ別に測定誤差を作成（算出）する必要があるが、各
測定地点の電気量測定器の種類を認識していないため、
タイプ別の測定誤差の作成が不可能である。In order to verify the function of the power system state estimating device, etc., when the measured values by each electric quantity measuring device are created,
Conventionally, there are the following problems. (1) Since two types of electric quantity measuring instruments, instantaneous value type and integral type, are mixed in the actual power system, it is necessary to create (calculate) the measurement error for each type. Since we do not know the type of electricity meter at the point,
It is impossible to create a measurement error for each type.
【００１２】（２）電気量の大きさを考慮せず、各地点
の電気量は一定であると仮定して測定器の持つ比例分誤
差の標準偏差に基づいて誤差を作成している。従って、
電気量の非常に小さい地点では誤差を相対的に多く含む
測定値となり、逆に電気量の非常に大きい地点では誤差
をほとんど含まない測定値となってしまう。(2) The error is created based on the standard deviation of the proportional error of the measuring device on the assumption that the amount of electricity at each point is constant without considering the magnitude of the amount of electricity. Therefore,
At a point where the quantity of electricity is very small, the measured value contains a relatively large amount of error, and on the contrary, at a point where the quantity of electricity is very large, the measured value hardly contains an error.
【００１３】（３）実系統で得られる測定値には、測定
地点の電気量がゼロであっても、測定器の持つ固有分誤
差により、あたかも電気量が存在しているような測定値
が得られる。しかし、従来の方法では、この固有分誤差
を想定した誤差を作成することができない。(3) In the measured value obtained in the actual system, even if the quantity of electricity at the measurement point is zero, there is a measured value as if the quantity of electricity were present due to the inherent error of the measuring instrument. can get. However, with the conventional method, it is not possible to create an error assuming this inherent error.
【００１４】本発明は上記課題を解決するためになされ
たもので、各種の電気量測定器から得られるデータの特
性を模擬して信頼性の高い測定値を作成し、従来よりも
現実的に機能検証等を行えるようにした電力系統状態推
定装置の支援方法を提供しようとするものである。The present invention has been made in order to solve the above-mentioned problems, and creates a highly reliable measured value by simulating the characteristics of data obtained from various electric quantity measuring devices, and is more realistic than in the past. It is intended to provide a support method for a power system state estimation device that enables functional verification and the like.
【００１５】[0015]
【課題を解決するための手段】上記課題を解決するた
め、請求項１記載の発明は、電力系統の複数の測定地点
に設置された電気量測定器による測定値を用いて電力系
統の状態を推定する電力系統状態推定装置の支援方法で
あって、前記状態推定装置の機能を検証するために、系
統定数及び系統状態に基づき潮流計算を実行し、その計
算結果を真値としてこの真値に正規分布状の測定誤差を
合成することにより各測定地点における電気量測定値を
算出するようにした支援方法において、電気量測定値の
大きさに比例する比例分誤差の標準偏差を電気量測定器
の種類（瞬時値型または積分型）別に設定し、これらの
標準偏差に基づいて電気量測定器の種類別に測定誤差を
作成するものである。これにより、電気量測定器のタイ
プ別に大きさの違った測定誤差を含む測定値を作成する
ことができる。In order to solve the above-mentioned problems, the invention according to claim 1 determines the state of the power system by using the measured values by the electricity quantity measuring devices installed at a plurality of measurement points of the power system. A method of assisting a power system state estimating device for estimating, wherein in order to verify the function of the state estimating device, a power flow calculation is executed based on a system constant and a system state, and the calculation result is set to a true value to obtain this true value. In the support method that calculates the electric quantity measurement value at each measurement point by combining the normal distribution measurement error, the standard deviation of the proportional error proportional to the magnitude of the electric quantity measurement value is used. Is set for each type (instantaneous value type or integral type), and a measurement error is created for each type of electrical quantity measuring device based on these standard deviations. As a result, it is possible to create a measurement value including a measurement error having a different size depending on the type of the electrical quantity measuring device.
【００１６】請求項２記載の発明は、請求項１記載の電
力系統状態推定装置の支援方法において、比例分誤差の
標準偏差を、電気量測定値の大きさに応じて演算するも
のである。これにより、電気量の大きさを考慮した標準
偏差に基づく測定誤差を含む測定値を作成することがで
きる。According to a second aspect of the present invention, in the method for supporting the power system state estimating apparatus according to the first aspect, the standard deviation of the proportional component error is calculated according to the magnitude of the measured electric quantity. As a result, it is possible to create a measurement value including a measurement error based on the standard deviation in consideration of the amount of electricity.
【００１７】請求項３記載の発明は、請求項１または２
記載の電力系統状態推定装置の支援方法において、電気
量測定値を作成するための測定誤差を、比例分誤差の標
準偏差と電気量測定器に固有の固有分誤差の標準偏差と
を合成した標準偏差に基づいて作成するものである。す
なわち、比例分誤差と固定分誤差とを合成した標準偏差
を基に測定誤差を作成し、この誤差を用いて測定値を作
成することにより、実際の電気量測定器の持つ比例分誤
差及び固定分誤差を混合した測定値を模擬することがで
きる。よって、電気量測定器から得られるデータの特性
を模擬して測定値を作成することにより、従来よりも現
実的な測定値を作成する支援方法を提供することが可能
になる。The invention according to claim 3 is the invention according to claim 1 or 2.
In the support method of the power system state estimation device described, in the measurement error for creating the electric quantity measurement value, the standard deviation of the proportional deviation error and the standard deviation of the eigenvalue error peculiar to the electric quantity measuring device are combined. It is created based on the deviation. That is, a measurement error is created based on a standard deviation that is a combination of a proportional error and a fixed error, and a measured value is created using this error. It is possible to simulate a measurement value in which minute errors are mixed. Therefore, by simulating the characteristics of the data obtained from the electric quantity measuring device and creating the measured value, it is possible to provide a support method for creating a more realistic measured value than before.
【００１８】[0018]
【発明の実施の形態】以下、図に沿って本発明の実施の
形態を説明する。図１は、請求項１，２，３に記載した
発明の実施形態による測定値作成方法のフローチャート
である。図１において、ステップＳ１〜Ｓ４は図５にお
ける各ステップ〜と共通であるため説明を省略し、
以下では、ステップＳ５〜Ｓ１３について説明する。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a flow chart of a measurement value creating method according to an embodiment of the invention described in claims 1, 2, and 3. In FIG. 1, steps S1 to S4 are common to each step in FIG.
Hereinafter, steps S5 to S13 will be described.
【００１９】・Ｓ５「測定器情報の入力」
このステップは、請求項１記載の発明の実施形態を実現
するためのものであり、測定地点１〜Ｉまでの各電気量
測定器のタイプ（瞬時値型か積分型か）を入力する。S5 “Input of measuring instrument information” This step is for realizing the embodiment of the invention described in claim 1, and is the type (instantaneous) of each electric quantity measuring instrument from measurement points 1 to I. Value type or integral type).
【００２０】・Ｓ６「比例分誤差の標準偏差入力（瞬時
値型及び積分型）」
このステップも、請求項１記載の発明の実施形態を実現
するためのものであり、正規分布状の誤差を作成する際
に必要な各電気量測定器の比例分誤差の標準偏差を、積
分型と瞬時値型との２種類のタイプに分類して入力す
る。S6 "Input of standard deviation of proportional error (instantaneous value type and integral type)" This step is also for realizing the embodiment of the invention described in claim 1, and the error of normal distribution form is The standard deviation of the proportional component error of each electric quantity measuring instrument required for creation is classified into two types, an integral type and an instantaneous value type, and input.
【００２１】・Ｓ７「固有分誤差の標準偏差入力」
このステップは、請求項３記載の発明の実施形態を実現
するためのものであり、電気量測定器の持つ固有分誤差
の標準偏差Ａを入力する。S7 “Input of standard deviation of eigencomponent error” This step is for realizing the embodiment of the invention described in claim 3, and the standard deviation A of eigencomponent error of the electric quantity measuring device is input.
【００２２】・Ｓ８「Ｉ＝測定地点数？」
全測定地点の測定値を作成（Ｉ＝測定地点数）するま
で、以下のステップＳ９〜Ｓ１３を繰返し実行する。こ
こで、Ｉは全測定地点の測定値を作成したかを判定する
ためのカウンタである。S8 "I = number of measurement points?" The following steps S9 to S13 are repeatedly executed until measurement values at all measurement points are created (I = number of measurement points). Here, I is a counter for determining whether or not measurement values at all measurement points have been created.
【００２３】・Ｓ９「測定器のタイプを検索し、標準偏
差を設定」
このステップは、請求項１記載の発明の実施形態を実現
するためのものであり、測定地点＝Ｉにおける電気量測
定器のタイプ（積分型または瞬時値型）を上記ステップ
Ｓ５の情報から検索し、標準偏差Ｂ＝比例分誤差の標準
偏差（積分型または瞬時値型）を設定する。S9 “Retrieve measurement device type and set standard deviation” This step is for realizing the embodiment of the invention described in claim 1, and the electric quantity measurement device at the measurement point = I The type (integral type or instantaneous value type) is searched from the information in step S5, and the standard deviation B = proportional error standard deviation (integral type or instantaneous value type) is set.
【００２４】・Ｓ１０「電気量の大きさに対する標準偏
差計算」
このステップは、請求項２記載の発明の実施形態を実現
するためのものである。図２は、標準偏差＝１０％及び
１％を設定し、誤差計算部にて１０００回誤差を作成し
た結果を示しており、その誤差を降順に並べたものであ
る。図において、ａ−１は標準偏差＝１％と設定して発
生させた誤差であり、誤差の分散は０．０１となってい
る。また、ａ−２は標準偏差＝１０％と設定して発生さ
せた誤差であり、誤差の分散は０．１となっている。S10 "Calculation of standard deviation for magnitude of electricity" This step is for realizing the embodiment of the invention described in claim 2. FIG. 2 shows the result of setting the standard deviation = 10% and 1% and creating an error 1000 times by the error calculating unit, and the errors are arranged in descending order. In the figure, a-1 is an error generated by setting the standard deviation = 1%, and the error dispersion is 0.01. Further, a-2 is an error generated by setting the standard deviation = 10%, and the error variance is 0.1.
【００２５】従来では、測定地点の測定器の比例分誤差
の標準偏差が１０％、真値が０．１であった場合、標準
偏差＝１０％のままで誤差を作成すると、真値の大きさ
に対して平均で１００％の誤差を含んだ測定値が作成さ
れてしまう。このような不都合が発生しないように、請
求項２の発明の実施形態では、電気量の大きさに対する
標準偏差Ｃ（＝標準偏差Ｂ×電気量の真値の大きさ）を
算出し、電気量の大きさを考慮した標準偏差を誤差計算
部に設定する。Conventionally, if the standard deviation of the proportional error of the measuring instrument at the measuring point is 10% and the true value is 0.1, if the error is created with the standard deviation of 10%, the true value becomes large. On the other hand, a measured value including an error of 100% on average is created. In order to prevent such an inconvenience from occurring, in the embodiment of the invention of claim 2, the standard deviation C (= standard deviation B × true value of the quantity of electricity) with respect to the magnitude of the quantity of electricity is calculated, and the quantity of electricity is calculated. The standard deviation considering the magnitude of is set in the error calculator.
【００２６】なお、表１は上記の説明を要約したもので
ある。Table 1 summarizes the above description.
【００２７】[0027]
【表１】 [Table 1]
【００２８】・Ｓ１１「比例分誤差と固有分誤差の標準
偏差を合成」
このステップは、請求項３記載の発明の実施形態を実現
するためのものである。図３は、標準偏差＝１０％及び
２０％を設定し、誤差計算部にて１０００回誤差を作成
した結果を示しており、その誤差を降順に並べたもので
ある。図において、ｂ−１は標準偏差＝１０％と設定し
て発生させた誤差であり、ｂ−２は標準偏差＝２０％と
設定して発生させた誤差である。また、ｂ−３は標準偏
差＝１０％と設定し、誤差計算部にて１０００回誤差を
計算したものを二つ作成してその二つの誤差を合計した
ものを降順に並べたものである。S11 "Synthesize standard deviation of proportional component error and eigencomponent error" This step is for realizing the embodiment of the invention described in claim 3. FIG. 3 shows the result of setting the standard deviations = 10% and 20% and creating an error 1000 times in the error calculation unit, and the errors are arranged in descending order. In the figure, b-1 is an error generated by setting standard deviation = 10%, and b-2 is an error generated by setting standard deviation = 20%. Further, b-3 is set by setting the standard deviation = 10%, creating two error values calculated 1000 times by the error calculation unit, and summing the two errors and arranging them in descending order.
【００２９】固有分誤差と比例分誤差とを含む測定値を
作成するには、個別に誤差を作成し、その誤差を合計し
て真値に加えれば良い。しかし、図からわかるように、
ｂ−２とｂ−３とはほぼ同じ結果となっており、比例分
誤差と固有分誤差とを個別に演算して合計しなくても、
最初から比例分誤差の標準偏差Ｃと固有分誤差の標準偏
差Ａとを合成した標準偏差Ｄ（＝Ｃ＋Ａ）を算出し、こ
の標準偏差Ｄに基づいて誤差計算を行うことにより、二
つの要因を含んだ誤差を同時に作成することが可能であ
り、演算処理を簡略化して演算時間を短縮することがで
きる。In order to create a measured value that includes an eigen component error and a proportional component error, it suffices to create the errors individually and add the errors and add them to the true value. However, as you can see from the figure,
b-2 and b-3 have almost the same result. Even if the proportional component error and the eigencomponent error are not individually calculated and summed,
From the beginning, a standard deviation D (= C + A) that is a combination of the standard deviation C of the proportional component error and the standard deviation A of the eigen component error is calculated, and the error is calculated based on this standard deviation D. The included error can be created at the same time, and the calculation process can be simplified and the calculation time can be shortened.
【００３０】・Ｓ１２「標準偏差を基に測定地点Ｉの誤
差作成（正規分布状）」
測定地点＝Ｉの標準偏差Ｄに基づき、測定地点＝Ｉにお
ける誤差を作成する。S12 "Creation of error at measurement point I based on standard deviation (normal distribution)" An error at measurement point = I is created based on standard deviation D of measurement point = I.
【００３１】・Ｓ１３「測定地点Ｉの測定値作成」
潮流計算により得られた測定地点＝Ｉの真値（仮定）と
上記ステップＳ１２において作成された測定地点＝Ｉの
誤差とを合わせて測定地点＝Ｉにおける測定値を作成す
る。S13 "Measurement value of measurement point I" The measurement point is obtained by combining the true value (assumed) of the measurement point = I obtained by the power flow calculation and the error of the measurement point = I created in step S12. = Make a measurement at I.
【００３２】[0032]
【発明の効果】以上のように、請求項１記載の発明によ
れば、電気量測定器のタイプ別に測定誤差を作成し、ま
た、請求項２記載の発明によれば、電気量である真値の
大きさを考慮した標準偏差に基づいて電気量の大きさに
比例した測定誤差を作成し、これらの誤差を用いて測定
値を作成することができる。また、請求項３記載の発明
においては、比例分誤差の標準偏差と固定分誤差の標準
偏差とを合成した標準偏差に基づいて測定誤差を作成
し、この誤差を用いて測定値を作成することができる。As described above, according to the first aspect of the invention, the measurement error is created for each type of the electricity quantity measuring device, and according to the second aspect of the invention, the true or false amount of electricity is calculated. It is possible to create a measurement error proportional to the magnitude of the quantity of electricity based on the standard deviation in consideration of the magnitude of the value, and use these errors to create the measurement value. In the invention according to claim 3, a measurement error is created based on a standard deviation that is a combination of the standard deviation of the proportional component error and the standard deviation of the fixed component error, and the measurement value is created using this error. You can
【００３３】このため、従来に比べて電気量測定器の種
別や電気量の大きさを考慮した信頼性の高い測定値を得
ることができ、電力系統状態推定装置の機能検証等に当
たり一層現実的な事前検証を行うことが可能になる。Therefore, it is possible to obtain a highly reliable measured value in consideration of the type of the electric quantity measuring device and the magnitude of the electric quantity as compared with the conventional one, and it is more realistic for the functional verification of the power system state estimating device. It is possible to perform various preliminary verifications.
【図１】請求項１，２，３の発明の実施形態による測定
値作成方法を示すフローチャートである。FIG. 1 is a flowchart showing a measurement value creating method according to an embodiment of the present invention.
【図２】各標準偏差に対する誤差の計算結果を示す図で
ある。FIG. 2 is a diagram showing a calculation result of an error with respect to each standard deviation.
【図３】各標準偏差に対する誤差の計算結果を示す図で
ある。FIG. 3 is a diagram showing a calculation result of an error with respect to each standard deviation.
【図４】状態推定支援装置と状態推定装置との関係及び
データの流れを示す図である。FIG. 4 is a diagram showing a relationship between a state estimation support device and a state estimation device and a data flow.
【図５】従来の状態推定支援処理における測定値作成方
法を示すフローチャートである。FIG. 5 is a flowchart showing a measurement value creation method in a conventional state estimation support process.
１００ 電力系統状態推定支援装置 ２００ 電力系統状態推定装置 100 power system state estimation support device 200 Power system state estimation device
フロントページの続き (56)参考文献 特開 平６−74996（ＪＰ，Ａ) 特開 昭60−82022（ＪＰ，Ａ) 特開 平３−270630（ＪＰ，Ａ) 特開 平７−294281（ＪＰ，Ａ) 特開 平５−161245（ＪＰ，Ａ) 特開 平４−183235（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) H02J 3/00 - 5/00 G01R 31/00 - 31/11 H02H 3/02 Continuation of front page (56) Reference JP-A-6-74996 (JP, A) JP-A-60-82022 (JP, A) JP-A-3-270630 (JP, A) JP-A-7-294281 (JP , A) JP 5-161245 (JP, A) JP 4-183235 (JP, A) (58) Fields investigated (Int.Cl. 7 , DB name) H02J 3/00-5/00 G01R 31/00-31/11 H02H 3/02
Claims (3)
電気量測定器による測定値を用いて電力系統の状態を推
定する電力系統状態推定装置の支援方法であって、前記
状態推定装置の機能を検証するために、系統定数及び系
統状態に基づき潮流計算を実行し、その計算結果を真値
としてこの真値に正規分布状の測定誤差を合成すること
により各測定地点における電気量測定値を作成するよう
にした支援方法において、 電気量測定値の大きさに比例する誤差としての比例分誤
差の標準偏差を電気量測定器の種類（瞬時値型または積
分型）別に設定し、これらの標準偏差に基づいて電気量
測定器の種類別に測定誤差を作成することを特徴とする
電力系統状態推定装置の支援方法。1. A support method for an electric power system state estimating device for estimating the state of an electric power system using measured values of electricity quantity measuring devices installed at a plurality of measuring points of the electric power system, the method comprising: In order to verify the function, the power flow calculation is executed based on the system constant and system state, and the calculation result is taken as the true value, and the measurement error in the normal distribution form is combined with this true value to measure the electrical quantity at each measurement point. In the support method that is designed to create, the standard deviation of the proportional error as an error proportional to the magnitude of the electricity quantity measurement value is set for each type of electricity quantity measuring instrument (instantaneous value type or integral type), and these A method for supporting a power system state estimation device, characterized in that a measurement error is created for each type of electrical quantity measuring device based on a standard deviation.
支援方法において、 比例分誤差の標準偏差を電気量測定値の大きさに応じて
演算することを特徴とする電力系統状態推定装置の支援
方法。2. The power system state estimating apparatus according to claim 1, wherein the standard deviation of the proportional error is calculated according to the magnitude of the electricity quantity measurement value. How to help.
定装置の支援方法において、 電気量測定値を作成するための測定誤差を、比例分誤差
の標準偏差と電気量測定器に固有の固有分誤差の標準偏
差とを合成した標準偏差に基づいて作成することを特徴
とする電力系統状態推定装置の支援方法。3. The method for supporting a power system state estimating device according to claim 1, wherein the measurement error for creating the electricity quantity measurement value is a standard deviation of the proportional component error and an intrinsic characteristic of the electricity quantity measuring device. A method for supporting an electric power system state estimating device, which is created based on a standard deviation obtained by combining a standard deviation of a minute error.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24836595A JP3453949B2 (en) | 1995-09-01 | 1995-09-01 | Support method for power system state estimation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24836595A JP3453949B2 (en) | 1995-09-01 | 1995-09-01 | Support method for power system state estimation device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0974677A JPH0974677A (en) | 1997-03-18 |
| JP3453949B2 true JP3453949B2 (en) | 2003-10-06 |
Family
ID=17177021
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24836595A Expired - Lifetime JP3453949B2 (en) | 1995-09-01 | 1995-09-01 | Support method for power system state estimation device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3453949B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104166060B (en) * | 2014-08-15 | 2017-01-04 | 国家电网公司 | A kind of robust state estimation method considering that large-scale wind power accesses |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4972623B2 (en) * | 2008-09-09 | 2012-07-11 | 株式会社日立製作所 | Distribution system state estimation apparatus, method and program |
| CN108767844B (en) * | 2018-04-25 | 2021-06-04 | 上海大学 | Self-adaptive state estimation method of networked multi-region power system under data injection attack |
-
1995
- 1995-09-01 JP JP24836595A patent/JP3453949B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104166060B (en) * | 2014-08-15 | 2017-01-04 | 国家电网公司 | A kind of robust state estimation method considering that large-scale wind power accesses |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0974677A (en) | 1997-03-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Wang et al. | A revised branch current-based distribution system state estimation algorithm and meter placement impact | |
| EP2798734B1 (en) | System and method for detecting generator incipient failures | |
| Das et al. | A fault locator for radial subtransmission and distribution lines | |
| Dirik et al. | A computation and metering method for harmonic emissions of individual consumers | |
| Arseneau et al. | Application of a three phase nonsinusoidal calibration system for testing energy and demand meters under simulated field conditions | |
| Geisler et al. | State estimation based external network solution for on-line security analysis | |
| Wang et al. | Real-time digital simulator of the electromagnetic transients of transmission lines with frequency dependence | |
| Xu et al. | Aggregate harmonic fingerprint models of PV inverters. part 1: Operation at different powers | |
| JP3453949B2 (en) | Support method for power system state estimation device | |
| JP4483622B2 (en) | Three-phase four-wire load simulator | |
| JP3461607B2 (en) | Method and apparatus for setting magnetic field influence coefficient | |
| JP3312172B2 (en) | Distribution line ground fault protection relay test method and apparatus | |
| JP3992665B2 (en) | Three-phase AC load simulator | |
| Yu et al. | A PC oriented interactive and graphical simulation package for power system study | |
| Kyriakides et al. | Estimation of synchronous generator parameters using an observer for damper currents and a graphical user interface | |
| CN112964923B (en) | Non-surrounding type current measuring method based on magnetic sensor array | |
| JP3514944B2 (en) | Power system simulator | |
| Artioli et al. | A general purpose software for distance monitoring and diagnosis of electrical machines | |
| CN114137360A (en) | Power distribution network fault positioning method and device and storage medium | |
| Veliz et al. | Determination of harmonic contributions using active filter: Theoretical and experimental results | |
| Kliman et al. | A demonstration of a sensorless torque meter for ac motors | |
| JPS6275278A (en) | Decision device for instrument accuracy | |
| CN108196211A (en) | A kind of number table automatic verification system | |
| Eisenbarth et al. | A data-driven method for estimating parameter uncertainty in PMU-based Power Plant Model Validation | |
| JP2005287128A (en) | Power system stability supervisory system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20030624 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080725 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080725 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090725 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090725 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100725 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110725 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110725 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120725 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120725 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130725 Year of fee payment: 10 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| EXPY | Cancellation because of completion of term |