Current matching state estimating method of power distribution network
A state estimation and distribution network technology, applied in the direction of measuring electricity, electrical components, circuit devices, etc., can solve the problem of low redundancy and only part, to meet the requirements of fast online calculation, good state estimation accuracy, and improve state estimation quality effect
Active Publication Date: 2014-04-16
FOSHAN POWER SUPPLY BUREAU GUANGDONG POWER GRID +1
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[0003] The purpose of the present invention is to propose a current-matched distribution network state estimation method. Aiming at the problem that the real-time measurement redundancy of the power distribution system is low and only part of the real-time current measurement is performed, the load power collected by the power billing system and the Quasi-real-time power measurement, automatically generating load pseudo-measurement, and then adjusting the load pseudo-measurement to make the estimated branch current consistent with the measured current measurement, providing a basic grid model for advanced applications of distribution networks
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[0022] The distribution network current matching state estimation method proposed by the present invention comprises the following steps:
[0023] (1) Since the distribution network operates radially, several areas can be divided with the branch where the current measurement is located, such as figure 1 shown. Each area contains a current measurement, which is a measurement area. According to the position of the current measurement, the depth-first search is used to establish the parent-child relationship between the measurement areas, that is, the downstream area is a sub-area of its direct upstream area. Perform independent current matching state estimation for each measurement area, and calculate the load and voltage distribution in this area. During the calculation process, the parent measurement area provides the estimated voltage value of the root node in the measurement area for the child measurement area, and the child measurement area provides the corresponding eq...
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The invention relates to a current matching state estimating method of a power distribution network, belonging to the technical field of power distribution network dispatching automation. The current matching state estimating method comprises the steps of: dividing the power distribution network into a plurality of current measurement regions, collecting a load power of a power distribution network platform area by a measurement system regularly, using an acquired power distribution network feeder root node voltage as a feeder root node voltage, using a load active power and a load reactive power acquired in the last time by the measurement system as an active power and a reactive power of a load point, and realizing state estimation of the power distribution network through a calculating process of matching current measurement. According to the current matching state estimating method, the real-time current measurement on a state estimation result fully-matching branch is ensured, the state estimation quality of the power distribution network can be improved, the requirement of rapid online calculation of the state estimation of the power distribution network is met, and the load pseudo measurement with similar accuracy in measurement can ensure better state estimation accuracy.
Description
technical field [0001] The invention relates to a method for estimating a distribution network current matching state, and belongs to the technical field of distribution network scheduling automation. Background technique [0002] State estimation is a key fundamental module of distribution management systems. The measurement configuration of the actual distribution network is still very poor. In addition to the voltage measurement of the root node, there is only real-time current measurement on the switch on the pole and the branch line. Real-time part load measurement. To build a smart distribution network, it is first necessary to realize the real-time perception of the operating state. The state estimation of the distribution network is to obtain a consistent and credible state of the entire network through limited measurement and calculation. The existing distribution network state estimation algorithm is difficult to be practically applied in the field of distributio...
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IPC IPC(8): H02J3/00G01R31/00
Inventor 吴文传张伯明张哲军孙宏斌巨云涛罗宇郭庆来
Owner FOSHAN POWER SUPPLY BUREAU GUANGDONG POWER GRID