Wind and solar power are non-dispatchable. Such power is normally sold before any other bids, at a pre-determined rate for each supplier. Any excess is sold to another grid operator, or stored, using pumped-storage hydroelectricity, or in the worst case, curtailed. Curtailment could potentially significantly impact solar power’s economic and environmental benefits at greater PV penetration levels. Allocation is done by bidding.
If you live in the greater Houston area, there are over 60 different energy suppliers competing for your business. Many of these providers have websites that are confusing and difficult to navigate, their rates buried in misleading advertising and dense jargon. Who has the time to sort through and keep track of options across all these different sites?
When it comes to pinpointing specific months rather than seasons, every part of the country has its own highest- and lowest-demand months. For example, hotter states, such as Texas, have their lowest demand anytime between December and March. When it comes to your own location, you can determine typical demand trends by taking a look at your area’s weather patterns or your billing records that showcase your personal monthly demand levels.
Excessive Total Harmonic Distortions (THD) and not unity Power Factor (PF) is costly at every level of the electricity market. Cost of PF and THD impact is difficult to estimate, but both can potentially cause heat, vibrations, malfunctioning and even meltdowns. Power factor is the ratio of real to apparent power in a power system. Drawing more current results in a lower power factor. Larger currents require costlier infrastructure to minimize power loss, so consumers with low power factors get charged a higher electricity rate by their utility. True power factor is made of displacement power factor and THD. Power quality is typically monitored at the transmission level. A spectrum of compensation devices mitigate bad outcomes, but improvements can be achieved only with real-time correction devices (old style switching type, modern low-speed DSP driven and near real-time). Most modern devices reduce problems, while maintaining return on investment and significant reduction of ground currents. Power quality problems can cause erroneous responses from many kinds of analog and digital equipment, where the response could be unpredictable.
Why are so many African power utilities effectively bankrupt? For one thing, they are incredibly inefficient. Efficiency can be improved by proper metering, investing in the system to reduce losses, improving collections and being able to cut off non-payers. This last one being easier if there is up-to-date metering and certain big players like government departments and military installations are also forced to obey the rules. These operational improvements and efficiencies will improve the supply of power but will not go far enough.
1. Contracts: Before, there were no contracts. You signed up or you didn’t. When it’s the only game in town, you have to play by their rules. Nowadays, you’ll see these ultra-fabulous rates bandied about but it’s only by carefully scrutinizing the fine print that you’ll discover those wonderful rates come with a one-year lock-down or other catches.
2. Fraud: Too many people have been victimized by glib sales reps with promises of cheap electricity flowing in an unending stream only to discover that, as is so often true, “it ain’t necessarily so”. They’ve been locked into unwanted term contracts or there’s a catch – some utilities will give you the great rate only if you meet a usage minimum; basically, the “rate” is, in actuality, a “bulk purchase” discounted fee – or they paid a deposit never to hear from the rep again.
Twenty-nine states have deregulated electricity, natural gas or both. That allows you to shop for the supply portion of your bill from alternative providers who may offer rates lower than the default supplier – usually a utility. Delivery services and billing will remain the responsibility of the local utility as they own the power lines and wires that keep the lights on.